WO2016026260A1

WO2016026260A1 - Non-isolated voltage-stabilization and current-equalization circuit and power supply system

Info

Publication number: WO2016026260A1
Application number: PCT/CN2015/070134
Authority: WO
Inventors: 徐建生; 莫少勇; 张振兴
Original assignee: 华为技术有限公司
Priority date: 2014-08-20
Filing date: 2015-01-05
Publication date: 2016-02-25
Also published as: CN104201882B; CN104201882A

Abstract

A non-isolated voltage-stabilization and current-equalization circuit and a power supply system. In the non-isolated voltage-stabilization and current-equalization circuit, a first voltage-stabilization and current-equalization unit (200) outputs direct current output by a first inductor (L1) and loop current output by load (500) to the load and a second inductor (L2) in a freewheeling mode respectively, so that the value of the direct current output by the second inductor is equal to that of the direct current fed into the first inductor; a voltage sampling unit (300) and a current sampling unit (400) are respectively used to sample voltage output by the first voltage-stabilization and current-equalization unit and loop current output by the load, and feed back a voltage sampling signal (V_S) and a current sampling signal (I_S) to a first controller (100); and the first controller drives the first voltage-stabilization and current-equalization unit to adjust the output voltage and the output current of the non-isolated voltage-stabilization and current-equalization circuit according to the voltage sampling signal and the current sampling signal, so that steady output voltage and output current can be maintained without the limit of input voltage difference and the power supply efficiency is improved.

Description

Non-isolated voltage regulation current sharing circuit and power supply system

Technical field

The invention belongs to the technical field of power supply, and particularly relates to a non-isolated voltage-stabilizing current sharing circuit and a power supply system.

Background technique

At present, with the upgrading of communication equipment, its power demand is getting larger and larger, so the input current of the communication equipment also needs to be correspondingly increased. In order to meet the high current demand of the communication equipment, the communication equipment room usually uses multiple power supply lines in parallel to form an electric resource pool, and combines the currents in the multiple power supply lines to be output to the communication device, so as to be different. The communication device enables flexible power distribution. When the multiple power supply lines are used in parallel, the prior art provides a solution in which the current is performed by connecting an impedance adjustment circuit in series with each power supply line when the currents in the multiple power supply lines are combined and combined. Adjusting processing, the impedance adjusting circuit includes a variable resistor, which adjusts the resistance of the variable resistor according to the current on the power supply line to balance the impedance of the power supply line, thereby keeping the current of each power supply line stable Balance; when the input voltage difference of the power supply line is large, the heat loss will also increase, the temperature will increase accordingly, and some of the power will be converted into heat energy, and the power supply efficiency is low.

technical problem

It is an object of the present invention to provide a non-isolated voltage-stabilizing current sharing circuit, which aims to solve the problem of low power supply efficiency in the prior art when current balancing is implemented on a power supply line.

Technical solution

The present invention is implemented in such a manner that a non-isolated voltage-stabilizing current sharing circuit includes a first controller, and the non-isolated voltage-stabilizing current sharing circuit further includes:

a first inductor, a second inductor, a first regulated current sharing unit, a voltage sampling unit, and a current sampling unit;

The first end of the first inductor is connected to the first direct current, the first end of the second inductor is outputting the second direct current, and the second end of the first inductor and the second end of the second inductor are respectively connected a first input end and a second input end of the first voltage stabilizing current sharing unit, wherein an output end of the first voltage stabilizing current sharing unit outputs a direct current to a load, and an input end and an output end of the voltage sampling unit are respectively connected An output end of the first voltage stabilizing current sharing unit and the first controller, a first sampling end of the current sampling unit receives a loop current output by a load, and a second sampling end and an output end of the current sampling unit Connecting the loop end of the first voltage stabilizing current sharing unit and the first controller, and the first controller is further connected to a DC power regulating end of the first voltage stabilizing current sharing unit;

Discharging the first direct current to the first regulated current sharing unit, and the first regulated current sharing unit outputs the direct current outputted by the first inductor to The load, the loop current output by the load is continuously outputted to the second inductor through the first regulated current sharing unit, and the second inductor outputs the energy after the loop current is stored a direct current, the current value of the second direct current is equal to a current value of the first direct current; the voltage sampling unit samples an output voltage of the non-isolated stabilized current sharing circuit, and feeds back a voltage sampling signal to the a first controller, the current sampling unit performs current sampling on the loop current, and feeds back a current sampling signal to the first controller, the first controller according to the voltage sampling signal and the current sampling signal Outputting a first control signal to the first regulated current sharing unit; when an output voltage of the non-isolated regulated current sharing circuit is greater than a preset current sharing voltage value and/or the loop current is greater than a preset current sharing current value The first regulated current sharing unit reduces an output voltage and/or an output current of the non-isolated regulated current sharing circuit according to the first control signal; when the output of the non-isolated regulated current sharing circuit When the voltage is less than the preset current sharing voltage value and/or the loop current is less than the preset current sharing current value, the first voltage stabilizing current sharing unit increases the non-isolation according to the first control signal The output voltage and / or output current of the regulated current sharing circuit.

The present invention also provides a power supply system including a plurality of power supply circuits, a current shunt circuit, and a plurality of current sharing circuits, wherein the current shunt circuit shunts an output current of the power circuit and outputs the a current sharing circuit, wherein the current combining module in the current sharing circuit combines any two currents output by the current dividing circuit to output a first direct current; the power supply system further includes the above non-isolated And a voltage stabilizing current sharing circuit, wherein the first inductor in the non-isolated voltage stabilizing current sharing circuit is connected to the first direct current from the current combining module.

Beneficial effect

The invention adopts a non-isolated voltage-stabilizing current sharing circuit including a first inductor, a second inductor, a first voltage-stabilizing current sharing unit, a voltage sampling unit and a current sampling unit; the first voltage-stabilizing current sharing unit outputs the first inductance The loop currents of the direct current and the load output are respectively outputted to the load and the second inductor, and the symmetric energy storage of the first inductor and the second inductor ensures that the current value of the second direct current output of the second inductor is equal to the first inductor. The current value of the first direct current, the voltage sampling unit samples the output voltage of the first regulated current sharing unit, and feeds back the voltage sampling signal to the first controller, and at the same time, the current sampling unit performs current sampling on the loop current, and feeds back the current. Sampling the signal to the first controller, and then outputting, by the first controller, the first control signal according to the voltage sampling signal and the current sampling signal to drive the output of the first voltage-stabilizing current sharing unit to the non-isolated voltage-stabilizing current sharing circuit The voltage and output current are adjusted to maintain a stable output voltage and output current. Since the first controller can drive the first voltage-stabilizing current sharing unit to adjust the output voltage of the non-isolated voltage-stabilizing current sharing circuit in combination with the voltage sampling signal fed back by the voltage sampling unit, even if the input pressure difference changes, the current controller can still Maintains a stable output voltage to maintain a stable output voltage without being limited by the input voltage difference; and because the non-isolated regulated current sharing circuit has a stable output voltage, and there is no increase in input voltage difference A device with a corresponding increase in heat loss, so that the entire circuit consumes less reactive power due to voltage instability and heat loss during operation, thereby also improving power supply efficiency.

DRAWINGS

1 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 1 of the present invention;

2 is a circuit diagram showing an example of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 2 of the present invention;

4 is a schematic circuit diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 2 of the present invention;

5 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 3 of the present invention;

6 is a circuit diagram showing an example of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 3 of the present invention;

7 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 4 of the present invention;

8 is a circuit diagram showing an example of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 4 of the present invention;

9 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit including a buck unit according to Embodiment 5 of the present invention;

10 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit including a buck unit according to Embodiment 5 of the present invention;

11 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit including a buck unit according to Embodiment 5 of the present invention;

12 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit including a buck unit according to Embodiment 5 of the present invention;

13 is an internal structural diagram of a buck unit in a non-isolated voltage stabilizing current sharing circuit according to Embodiment 5 of the present invention;

14 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 6 of the present invention;

15 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 6 of the present invention;

16 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 6 of the present invention;

17 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 6 of the present invention;

18 is an internal structural diagram of a buck unit in a non-isolated voltage stabilizing current sharing circuit according to Embodiment 6 of the present invention;

19 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

20 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

21 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

22 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

23 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

24 is a schematic structural diagram of a non-isolated voltage stabilizing current sharing circuit according to Embodiment 7 of the present invention;

25 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

26 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

27 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

28 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

29 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention;

FIG. 30 is a schematic structural diagram of a non-isolated voltage-stabilizing current sharing circuit according to Embodiment 7 of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The non-isolated voltage-stabilizing current sharing circuit provided by the embodiment of the present invention is described in detail below with reference to specific embodiments:

Embodiment 1:

FIG. 1 shows a non-isolated voltage-stabilizing current sharing circuit provided by this embodiment. For convenience of description, only parts related to the embodiment are shown, which are described in detail as follows:

The non-isolated regulated current sharing circuit includes a first controller 100, which may be a microcontroller or a pulse width modulator.

The non-isolated regulated current sharing circuit further includes a first inductor L1, a second inductor L2, a first regulated current sharing unit 200, a voltage sampling unit 300, and a current sampling unit 400.

The first end of the first inductor L1 is connected to the first direct current Vin+, the first end of the second inductor L2 is outputting the second direct current Vin-, and the second end of the first inductor L1 and the second end of the second inductor L2 are respectively connected The first input end and the second input end of the voltage stabilizing current sharing unit 200, the output end of the first voltage stabilizing current sharing unit 200 outputs DC power to the load 500, and the input end and the output end of the voltage sampling unit 300 are respectively connected to the first stable The output end of the voltage equalization unit 200 and the first controller 100, the first sampling end of the current sampling unit 400 receives the loop current output by the load 500, and the second sampling end and the output end of the current sampling unit 400 are respectively connected to the first voltage regulator. The loop end of the current sharing unit 200 and the first controller 100 are further connected to the DC power regulating end of the first voltage stabilizing current sharing unit 200.

The first inductor L1 stores the first DC power Vin+ and outputs the same to the first voltage stabilizing current unit 200. The first voltage stabilizing current unit 200 outputs the DC current outputted by the first inductor L1 to the load 500, and the load 500 The output loop current is continuously outputted to the second inductor L2 through the first regulated current sharing unit 200, and the second inductor L2 stores the second direct current Vin-, the current of the second direct current Vin- after storing the loop current. the first value is equal to the DC current value Vin +; output voltage sampling unit 300 to non-isolated current-regulator circuit (i.e., the output voltage direct current to the load 500) is sampled, and the sampled feedback voltage V _S to the first control signal The current sampling unit 400 samples the current of the loop current output by the load 500, and feeds back the current sampling signal I _S to the first controller 100. The first controller 100 outputs the first according to the voltage sampling signal and the current sampling signal. Controlling the signal Ctrl ₁ to the first regulated current sharing unit 200; when the output voltage of the non-isolated regulated current sharing circuit is greater than the preset current sharing voltage value and/or the loop current is greater than the preset current sharing current At the time of the flow, the first regulated current sharing unit 200 reduces the output voltage and/or the output current of the non-isolated regulated current sharing circuit according to the first control signal Ctrl ₁ ; when the output voltage of the non-isolated regulated current sharing circuit is less than the pre- When the current sharing voltage value and/or the loop current is less than the preset current sharing current value, the first voltage stabilizing current sharing unit 200 increases the output voltage of the non-isolated voltage regulating current sharing circuit according to the first control signal Ctrl ₁ and/or Or output current.

It can be seen from the above that the first end of the first inductor L1 and the first end of the second inductor L2 are equivalent to the positive end and the negative end of the power supply line, the positive end is connected to the first direct current Vin+, and the negative end is outputting the second direct current Vin- . The preset current sharing voltage value and the preset current sharing current value respectively refer to: non-isolated voltage regulation current flow when the non-isolated voltage-stabilizing current sharing circuit supplies power to the power supply line and needs to achieve voltage regulation and current balance. The output voltage value and output current value of the circuit.

In addition, in the above-described non-isolated voltage-stabilizing current sharing circuit, since the output voltage can be detected and the output voltage is adjusted according to the voltage sampling signal, the output voltage is not unstable due to the change of the input voltage difference. Therefore, the normal operation of the above non-isolated regulated current sharing circuit is not limited by the input voltage difference with respect to the prior art mentioned in the background art.

The power supply efficiency is actually related to the "stabilization of the output voltage" and the "heat loss of the device". The low power supply efficiency is caused by the excessive reactive power generated during the power supply, and the output voltage exceeds the line. When the rated voltage of the load can be increased, the reactive power is increased, and the heat loss of the device in the circuit is increased to increase the reactive power. In the above non-isolated voltage-stabilizing current sharing circuit, adjusting the output voltage in real time can stabilize the output voltage, thereby reducing the reactive power during power supply, and the device used in the non-isolated voltage-stabilizing current sharing circuit is not When the input pressure difference becomes large, the heat loss increases, and the reactive power at the time of power supply also decreases, so that the effect of improving the power supply efficiency can be achieved.

FIG. 2 shows an example circuit structure of the non-isolated voltage-stabilizing current sharing circuit provided by this embodiment. For convenience of description, only parts related to the embodiment are shown, which are as follows:

The first regulated current sharing unit 200 includes a first isolation transformer T1, a first switching transistor 201, a first freewheeling diode D1, and a second freewheeling diode D2.

The first end 1 of the primary winding of the first isolation transformer T1 is the DC regulation terminal of the first voltage stabilizing current sharing unit 200, and the second end 2 of the primary winding of the first isolation transformer T1 is coupled to the first controller 100. The first end 3 and the second end 4 of the secondary winding of the first isolation transformer T1 are respectively connected to the controlled end and the input end of the first switch tube 201, and the output end of the first switch tube 201 and the first freewheeling diode The common junction of the anode of D1 is the first input end of the first regulated current sharing unit 200, the input end of the first switching transistor 201 and the second freewheeling diode The common junction of the cathode of D2 is the second input end of the first voltage stabilizing current sharing unit 200, and the cathode of the first freewheeling diode D1 and the anode of the second freewheeling diode D2 are respectively the output of the first voltage stabilizing current sharing unit 200. End and loop side.

The first switch tube 201 can be a MOS tube (including an NMOS tube and a PMOS tube), and an IGBT (Isolated) Gate Bipolar Transistor, insulated gate bipolar thyristor or other semiconductor device with switching characteristics. In particular, when the first switch tube 201 is a MOS transistor or an IGBT, the gate, the source, and the drain of the MOS transistor or the IGBT are respectively the controlled end, the input end, and the output end of the first switch tube 201; For example, as shown in FIG. 2, the first switch tube 201 is specifically a PMOS tube Q1.

The voltage sampling unit 300 includes a first resistor R1 and a second resistor R2. The first end of the first resistor R1 is an input end of the voltage sampling unit 300, and the second end of the first resistor R1 and the first end of the second resistor R2 The common contact is the output of the voltage sampling unit 300, and the second end of the second resistor R2 is grounded.

The current sampling unit 400 includes a third resistor R3 and a differential amplifier U1. The common end of the first end of the third resistor R3 and the first input of the differential amplifier U1 is the first sampling end of the current sampling unit 400, and the third resistor R3 The common terminal of the second terminal and the second input terminal of the differential amplifier U1 is the second sampling terminal of the current sampling unit 400, the output terminal of the differential amplifier U1 is the output terminal of the current sampling unit 400, and the positive power terminal and the negative power terminal of the differential amplifier U1. Connect the DC power supply VCC and ground separately.

The following describes the non-isolated voltage-stabilizing current sharing circuit shown in Figure 2 in combination with the working principle:

The first inductor L1 stores the DC power of the first DC power Vin+, and the DC power is outputted to the load 500 after being freewheeled by the first freewheeling diode D1, and the loop current output by the load 500 flows through the second freewheeling diode D2. Outputting to the second inductor L2, the second inductor L2 stores the second direct current Vin- after storing the loop current, and the current value of the first direct current Vin+ is caused by the symmetric energy storage of the first inductor L1 and the second inductor L2. A current value equal to the second direct current Vin-. At the same time, the first resistor R1 and the second resistor R2 perform voltage sampling on the direct current output to the load, and feed back the voltage sampling signal to the first controller 100, and the third resistor R3 samples the loop current of the load, and is The differential amplifier U1 differentially amplifies the sampling voltage across the third resistor R3 and outputs a corresponding current sampling signal to the first controller 100. The first controller 100 outputs the first according to the voltage sampling signal V _S and the current sampling signal I _S . The control signal Ctrl _{1 is} to the first isolation transformer T1, and the first control signal Ctrl ₁ is isolated by the first isolation transformer T1 to control the on-off state of the PMOS transistor Q1, and the PMOS transistor Q1 is corresponding to the first control signal Ctrl ₁ The duty cycle realizes the on-off operation, thereby adjusting the output voltage and the output current to ensure the stability of the output voltage and the output current. Specifically, when the output voltage of the non-isolated voltage-stabilizing current sharing circuit is greater than the preset current sharing voltage value and/or the loop current is greater than the preset current sharing current value, the duty ratio corresponding to the first control signal Ctrl1 is followed. When a certain duty cycle change value is decreased, the output voltage and/or output current of the non-isolated voltage-stabilizing current sharing circuit is also reduced correspondingly during the corresponding on-off operation of the PMOS transistor Q1; when non-isolated When the output voltage of the constant current sharing circuit is less than the preset current sharing voltage value and/or the loop current is less than the preset current sharing current value, the duty ratio corresponding to the first control signal Ctrl ₁ is according to a certain duty ratio. As the variation value increases, the output voltage and/or output current of the non-isolated voltage-stabilizing current sharing circuit is also increased correspondingly during the corresponding on-off operation of the PMOS transistor Q1.

In this embodiment, the non-isolated voltage-stabilizing current sharing circuit includes a first inductor L1, a second inductor L2, a first voltage stabilizing current sharing unit 200, a voltage sampling unit 300, and a current sampling unit 400, which have a simple circuit structure and a small volume. Low cost and high power density.

In addition, the switching duty ratio of the first switching transistor 201 is controlled by the first controller 100 to adjust the output voltage and the output current of the non-isolated voltage stabilizing current sharing circuit, so that the input voltage difference can be limited. Maintains stable output voltage and output current, and further improves power supply efficiency.

Embodiment 2:

The non-isolated voltage-stabilizing current sharing circuit provided in this embodiment is shown in FIG. 3, and further includes a third inductor L3, a fourth inductor L4, and a second. The voltage equalization unit 600.

The first end of the third inductor L3 and the first end of the fourth inductor L4 are respectively connected to the first end of the first inductor L1 and the first end of the second inductor L2, the second end of the third inductor L3 and the fourth inductor L4 The second terminal is connected to the first input end and the second input end of the second voltage stabilizing current sharing unit 600, and the DC power regulating end of the second voltage stabilizing current sharing unit 600 is connected to the first controller 100. The output end and the loop end of the flow unit 600 are respectively connected to the output end and the loop end of the first voltage stabilizing current sharing unit 200.

Under the control of the first controller, the first regulated current sharing unit 200 and the second regulated current sharing unit 600 alternately operate; the third inductor L3 stores the first direct current Vin+ and outputs the third direct current Vin+' to the first The second regulated current sharing unit 600, when the second regulated current sharing unit 600 is operated, the second regulated current sharing unit 600 outputs the third direct current Vin+' freewheeling output to the load 500, and the loop current output by the load 500 passes through the first The second regulated current sharing unit 600 is continuously outputted to the fourth inductor L4, and the fourth inductor L4 stores the fourth direct current Vin-' after storing the loop current, and the current value of the fourth direct current Vin-' is equal to the third direct current. The current value of Vin+'; the first controller 100 outputs the first control signal Ctrl ₁ and the second control signal Ctrl ₂ to the voltage sampling signal output by the voltage sampling unit 300 and the current sampling signal output by the current sampling unit 400, respectively. a regulated current sharing unit 200 and a second regulated current sharing unit 600; when the output voltage of the non-isolated regulated current sharing circuit is greater than a preset current sharing voltage value and/or the loop current output by the load 500 is greater than a preset current sharing Current value, the first voltage regulator Flow regulator unit 200 and the second equalizing unit 600 respectively according to the first control signal and second control signals Ctrl ₁ Ctrl ₂ operate alternately in order to reduce non-isolated current-regulator circuit output voltage and / or output current; when the non- When the output voltage of the isolated constant current sharing circuit is less than the preset current sharing voltage value and/or the loop current is less than the preset current sharing current value, the first voltage stabilizing current sharing unit 200 and the second voltage regulating current sharing unit 600 respectively The first control signal Ctrl ₁ and the second control signal Ctrl ₂ are alternately operated to increase the output voltage and/or output current of the non-isolated regulated current sharing circuit.

In this embodiment, the first voltage stabilizing current sharing unit 200 and the second voltage stabilizing current sharing unit 600 alternately adjust the output voltage and the output current to facilitate the non-isolated voltage-stabilizing current sharing circuit at the high current input and the load power. It can work stably when the demand is large.

4 shows an example circuit structure of the non-isolated voltage-stabilizing current sharing circuit provided in this embodiment, wherein the internal structures of the first voltage stabilizing unit 200, the voltage sampling unit 300, and the current sampling unit 400 are the same as those shown in FIG. Therefore, I will not repeat them.

For the second regulated current sharing unit 600, it includes a second isolation transformer T2, a second switching transistor 601, a third freewheeling diode D3, and a fourth freewheeling diode D4.

The first end 1 of the primary winding of the second isolating transformer T2 is the DC regulating end of the second regulated current sharing unit 600, and the second end 2 of the primary winding of the second isolating transformer T2 is connected to the ground of the first controller 100. The first end 3 and the second end 4 of the secondary winding of the second isolation transformer T2 are respectively connected to the controlled end and the input end of the second switch tube 601, and the output end of the second switch tube 601 and the third freewheeling diode D3 The common junction of the anode is the first input end of the second regulated current sharing unit 600, the input end of the second switching transistor 601 and the fourth freewheeling diode The common junction of the cathode of D4 is the second input end of the second regulated current sharing unit 600, and the cathode of the third freewheeling diode D3 and the anode of the fourth freewheeling diode D4 are respectively outputs of the second regulated current sharing unit 600. End and loop side.

The second switch tube 601 and the first switch tube 201 are the same type of semiconductor switch tubes, and the semiconductor switch tubes may be MOS tubes (including NMOS tubes and PMOS tubes), IGBTs or other semiconductor devices having switching characteristics, and When the semiconductor switching transistor is a MOS transistor or an IGBT, the gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled terminal, an input terminal and an output terminal of the semiconductor switching transistor. Since the first switch tube 201 is the same as that described in the first embodiment of the present invention, it will not be described herein. For the second switch tube 601, when the second switch tube 601 is a MOS tube or an IGBT, the gate, the source and the drain of the MOS tube or the IGBT are respectively the controlled end, the input end and the output of the second switch tube 601. end. In this embodiment, as shown in FIG. 4, the second switch tube 601 is specifically a PMOS tube Q2.

In this embodiment, the working principle of the second voltage stabilizing current sharing unit 600 is the same as that of the first voltage stabilizing current sharing unit 200, wherein the first switching tube 201 and the second switching tube 601 are according to the first controller 100. The output first control signal Ctrl ₁ and the second control signal Ctrl ₂ are alternately turned on, that is, when the PMOS transistor Q1 is turned on, the PMOS transistor Q2 is turned off; when the PMOS transistor Q1 is turned off, the PMOS transistor Q2 is turned on, so the first A regulated current sharing unit 200 and the second regulated current sharing unit 600 form a complementary regulated current sharing operating state, and control the output voltage and output current of the entire non-isolated regulated current sharing circuit to ensure the output voltage and The output current is stable.

Embodiment 3:

The non-isolated voltage-stabilizing current sharing circuit provided in this embodiment is shown in FIG. 5, wherein the first voltage-stabilizing current sharing unit 200 further has a first continuation. The first freewheeling control terminal and the second freewheeling control terminal of the first voltage stabilizing current sharing unit 200 are also connected to the first controller 100.

FIG. 6 shows an example circuit structure of the non-isolated voltage-stabilizing current sharing circuit provided by this embodiment, wherein the internal structures of the voltage sampling unit 300 and the current sampling unit 400 are the same as those shown in FIG. 2, and therefore will not be described again.

For the first regulated current sharing unit 200, as shown in FIG. 6, it includes a third isolation transformer T3, a third switching transistor 203, a fourth isolation transformer T4, a fourth switching transistor 204, and a fifth switching transistor 205.

The first end 1 of the primary winding of the third isolation transformer T3 is the DC regulation terminal of the first regulated current sharing unit 200, and the second end 2 of the primary winding of the third isolation transformer T3 is connected to the first controller 100. The first end 3 and the second end 4 of the secondary winding of the third isolation transformer T3 are respectively connected to the controlled end and the input end of the third switch tube 203, and the output end of the third switch tube 203 and the fourth switch tube 204 The common contact at the input end is the first input end of the first regulated current sharing unit 200, and the common contact between the input end of the third switching tube 203 and the output end of the fifth switching tube 205 is the second of the first regulated current sharing unit 200. At the input end, the first end 1 of the primary winding of the fourth isolation transformer T4 is the first freewheeling control terminal of the first regulated current sharing unit 200, and the second end 2 of the primary winding of the fourth isolation transformer T4 is connected to the first control The first end 3 and the second end 4 of the secondary winding of the fourth isolation transformer T4 are respectively connected to the controlled end and the input end of the fourth switch tube 204, and the controlled end of the fifth switch tube 205 is connected to the ground. The second freewheeling control terminal of the first regulated current sharing unit 200, and the output end of the fourth switching transistor 204 Input terminal of the fifth switch 205 are respectively a first flow regulator and a circuit output terminal 200 of the end unit.

The third switch tube 203, the fourth switch tube 204, and the fifth switch tube 205 are the same type of semiconductor switch tubes, and the semiconductor switch tubes can be MOS tubes (including NMOS tubes and PMOS tubes), IGBTs, or other switching characteristics. The semiconductor device, and when the semiconductor switching transistor is a MOS transistor or an IGBT, the gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled end, an input end and an output end of the semiconductor switching tube. In particular, when the third switching transistor 203 is a MOS transistor or an IGBT, the gate, the source, and the drain of the MOS transistor or the IGBT are respectively the controlled terminal, the input terminal, and the output terminal of the third switching transistor 203; similarly, When the fourth switch tube 204 is a MOS transistor or an IGBT, the gate, the source and the drain of the MOS transistor or the IGBT are respectively the controlled end, the input end and the output end of the fourth switch tube 204; when the fifth switch tube 205 When it is a MOS tube or IGBT, The gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled end, an input end and an output end of the fifth switch tube 205. In this embodiment, as shown in FIG. 6, the third switch tube 203, the fourth switch tube 204, and the fifth switch tube 205 are specifically a PMOS transistor Q3, a PMOS transistor Q4, and a PMOS transistor Q5.

The following describes the non-isolated voltage-stabilizing current sharing circuit shown in Figure 6 in combination with the working principle:

The first inductor L1 stores and stores the first DC power Vin+, and the freewheeling control signal outputted by the first controller 100 is isolated by the fourth isolation transformer T4 to drive the PMOS transistor Q4 to conduct, for the first inductor L1. The output DC power is continuously discharged and output to the load 500, and the freewheeling control signal outputted by the first controller 100 drives the PMOS transistor Q6 to be turned on to re-current the loop current outputted by the load 500 and output to the second inductor L2. The second inductor L2 stores the current of the loop and outputs the second direct current Vin-, and the current value of the second direct current Vin- is equal to the first direct current Vin+ due to the symmetric energy storage of the first inductor L1 and the second inductor L2. Current value. At the same time, the first resistor R1 and the second resistor R2 perform voltage sampling on the direct current output to the load, and feed back the voltage sampling signal to the first controller 100, and the third resistor R3 samples the loop current of the load, and the differential amplifier is used. U1 differentially amplifies the sampling voltage across the third resistor R3 and outputs a corresponding current sampling signal to the first controller 100. The first controller 100 outputs the first control signal according to the voltage sampling signal V _S and the current sampling signal I _{S .} Ctrl ₁ to the first isolation transformer T1, the first control signal Ctrl ₁ is isolated by the first isolation transformer T1 to control the on-off state of the PMOS transistor Q3, and the PMOS transistor Q3 is corresponding to the first control signal Ctrl ₁ The air ratio achieves the on-off operation, thereby adjusting the output voltage and the output current to ensure the stability of the output voltage and the output current. Specifically, when the output voltage of the non-isolated voltage-stabilizing current sharing circuit is greater than the preset current sharing voltage value and/or the loop current is greater than the preset current sharing current value, the duty ratio corresponding to the first control signal Ctrl ₁ According to a certain duty cycle change value, the output voltage and/or output current of the non-isolated voltage-stabilizing current sharing circuit can be correspondingly reduced during the corresponding on-off operation of the PMOS transistor Q3; When the output voltage of the isolated constant current sharing circuit is less than the preset current sharing voltage value and/or the loop current is less than the preset current sharing current value, the duty ratio corresponding to the first control signal Ctrl ₁ will be according to a certain duty cycle. When the ratio change value is increased, the output voltage and/or output current of the non-isolated voltage-stabilizing current sharing circuit is also increased correspondingly during the corresponding on-off operation of the PMOS transistor Q3.

In this embodiment, by using the fourth switching tube 204 and the fifth switching tube 205 to achieve the freewheeling action, the conduction loss can be further reduced, the power supply efficiency can be improved, and the non-isolated voltage-stabilizing current sharing circuit is suitable for the input current. Application scenario.

Embodiment 4:

The non-isolated voltage-stabilizing current sharing circuit provided in this embodiment is shown in FIG. 7 , and further includes a fifth inductor L5, a sixth inductor L6, and a third. Regulated current sharing unit 700.

The first end of the fifth inductor L5 and the first end of the sixth inductor L6 are respectively connected to the first end of the first inductor L1 and the first end of the second inductor L2, and the second end of the fifth inductor L5 and the sixth inductor L6 The second end of the third regulated current sharing unit 700 is connected to the first input end and the second input end of the third regulated current sharing unit 700, and the DC power regulating end of the third regulated current sharing unit 700, the first freewheeling control end, and the second freewheeling control The terminal is connected to the first controller 100, and the output end and the loop end of the third regulated current sharing unit 700 are respectively connected to the output end and the loop end of the first voltage stabilizing current sharing unit 200.

Under the control of the first controller 100, the first regulated current sharing unit 200 and the third regulated current sharing unit 700 alternately operate; the fifth inductor L5 stores the first direct current Vin+ and outputs the fifth direct current Vin+' Up to the third regulated current sharing unit 700, when the third regulated current sharing unit 700 is in operation, the third regulated current sharing unit 700 continuously outputs the fifth direct current Vin+'' to the load 500, and the circuit output by the load 500 The current is continuously outputted to the sixth inductor L6 through the third regulated current sharing unit 700, and the sixth inductor L6 stores the sixth direct current Vin-'', and the current of the sixth direct current Vin-'' Vin + is equal to the current value of the fifth DC ''; a first controller 100 outputs a third control signal Ctrl ₃ ₁ outputs a first control signal when the Ctrl; a first controller 100 according to the voltage sampling unit 300 samples the voltage output signal and The current sampling signal output by the current sampling unit 400 outputs the first control signal Ctrl ₁ and the third control signal Ctrl ₃ to the first regulated current sharing unit 200 and the third regulated current sharing unit 700, respectively; The output voltage of the circuit is greater than the preset current sharing voltage value When / or the load circuit current 500 output from the average flow greater than a preset current value, a first current-regulator unit 200 and the third current-regulator unit 700 respectively according to the first control signal and third control signals Ctrl ₁ Ctrl ₃ Alternating to reduce the output voltage and/or output current of the non-isolated regulated current sharing circuit; when the output voltage of the non-isolated regulated current sharing circuit is less than the preset current sharing voltage value and/or the loop current is less than the preset current When the current value is current, the first voltage stabilizing current sharing unit 200 and the third voltage stabilizing current sharing unit 700 respectively operate according to the first control signal Ctrl ₁ and the third control signal Ctrl ₃ to increase the non-isolated voltage stabilizing current sharing circuit. Output voltage and / or output current.

In this embodiment, the first voltage stabilizing current sharing unit 200 and the third voltage stabilizing current sharing unit 700 alternately adjust the output voltage and the output current to help the non-isolated voltage-stabilizing current sharing circuit at the high current input and the load power. It can work stably when the demand is large.

FIG. 8 shows an example circuit structure of the non-isolated voltage-stabilizing current sharing circuit provided by the embodiment, wherein the internal structures of the first voltage stabilizing unit 200, the voltage sampling unit 300, and the current sampling unit 400 are the same as those shown in FIG. Therefore, I will not repeat them.

For the third regulated current sharing unit 700, the fifth isolation transformer T5, the sixth switching tube 701, the sixth isolation transformer T6, the seventh switching tube 702, and the eighth switching tube 703 are included.

The first end 1 of the primary winding of the fifth isolation transformer T5 is the DC regulation terminal of the third regulated current sharing unit 700, and the second end 2 of the primary winding of the fifth isolation transformer T5 is connected to the first controller 100 The first end 3 and the second end 4 of the secondary winding of the fifth isolation transformer T5 are respectively connected to the controlled end and the input end of the sixth switch tube 701, and the output end of the sixth switch tube 701 and the seventh switch tube 702 The common contact at the input end is the first input end of the third regulated current sharing unit 700, and the common contact between the input end of the sixth switching tube 701 and the output end of the eighth switching tube 703 is the second of the third regulated current sharing unit 700. At the input end, the first end 1 of the primary winding of the sixth isolation transformer T6 is the first freewheeling control terminal of the third regulated current sharing unit 700, and the second end 2 of the primary winding of the sixth isolation transformer T6 is connected to the first control The first end 3 and the second end 4 of the secondary winding of the sixth isolation transformer T6 are respectively connected to the controlled end and the input end of the seventh switch tube 702, and the controlled end of the eighth switch tube 703 is connected to the ground. The second freewheeling control terminal of the third regulated current sharing unit 700, the output of the seventh switching transistor 702 Input terminal of the eighth switch 703 are respectively regulated third stream output unit 700 and the end of the loop.

The third switch tube 203, the fourth switch tube 204, the fifth switch tube 205, the sixth switch tube 701, the seventh switch tube 702, and the eighth switch tube 703 are the same type of semiconductor switch tubes, and the semiconductor switch tubes can be It is a MOS transistor (including an NMOS transistor and a PMOS transistor), an IGBT, or another semiconductor device having a switching characteristic, and when the semiconductor switching transistor is a MOS transistor or an IGBT, the gate, the source, and the drain of the MOS transistor or the IGBT are respectively The controlled end, the input end and the output end of the semiconductor switch tube. The third switch tube 203, the fourth switch tube 204, and the fifth switch tube 205 are the same as those described in the third embodiment of the present invention, and details are not described herein again. For the sixth switch 701, the seventh switch 702, and the eighth switch 703, when the sixth switch 701 is a MOS transistor or an IGBT, the gate, the source, and the drain of the MOS transistor or the IGBT are respectively sixth. The controlled end, the input end and the output end of the switch tube 701. Similarly, when the seventh switch tube 702 is a MOS tube or an IGBT, the gate, the source and the drain of the MOS tube or the IGBT are respectively the seventh switch tube 702. The controlled terminal, the input terminal and the output terminal; when the eighth switch transistor 703 is a MOS transistor or an IGBT, the gate, the source and the drain of the MOS transistor or the IGBT are respectively controlled ends and inputs of the eighth switch transistor 703 End and output. In this embodiment, as shown in FIG. 8, the sixth switch tube 701, the seventh switch tube 702, and the eighth switch tube 703 are specifically a PMOS transistor Q6, a PMOS transistor Q7, and a PMOS transistor Q8.

In this embodiment, the working principle of the third regulated current sharing unit 700 is the same as that of the first regulated current sharing unit 200. The third switching tube 203 and the sixth switching tube 701 are configured according to the first controller 100. The output first control signal Ctrl ₁ and the third control signal Ctrl ₃ are alternately turned on, that is, when the PMOS transistor Q3 is turned on, the PMOS transistor Q6 is turned off; when the PMOS transistor Q3 is turned off, the PMOS transistor Q6 is turned on, so the first The regulated current sharing unit 200 and the third regulated current sharing unit 700 form a complementary regulated current sharing working state, and control the output voltage and output current of the entire non-isolated voltage balanced current sharing circuit to ensure the output voltage and output. The current is stable.

In addition, in this embodiment, by using the fourth switching tube 204, the fifth switching tube 205, the seventh switching tube 702, and the eighth switching tube 703 to achieve the freewheeling action, the conduction loss can be further reduced, thereby improving the power supply efficiency.

Embodiment 5:

The non-isolated voltage-stabilizing current sharing circuits provided in this embodiment are respectively shown in FIG. 9, FIG. 10, FIG. 11, and FIG. 12, and the non-isolated voltage-stabilizing current sharing circuits shown in FIG. 9, FIG. 10, FIG. 11, and FIG. Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 1, FIG. 3, FIG. 5 and FIG. 7, the step-down unit 800 is further included, and the input end and the circuit end of the buck unit 800 are respectively connected to the first The output of the constant current sharing unit 200 and the current sampling unit At the first sampling end of 400, the buck unit 800 steps down the DC power input to the input terminal and outputs it through its output terminal.

As shown in FIG. 13, the buck unit 800 includes a ninth switch 801, a seventh inductor L7, a first diode D11, a first capacitor C11, and a second controller 802.

The input end of the ninth switch 801 is the input end of the buck unit 800, and the output end of the ninth switch 801 is connected to the cathode of the first diode D11 to the first end of the seventh inductor L7, and the seventh inductor L7 The common end of the second end of the first capacitor C11 is the output end of the buck unit 800, and the common junction of the anode of the first diode D11 and the second end of the first capacitor C11 is the buck unit 800. At the loop end, the controlled end of the ninth switch 801 is connected to the second controller 802.

The ninth switch 801, the seventh inductor L7, the first diode D11, and the first capacitor C11 constitute a buck buck circuit, and the buck buck circuit inputs the input of the ninth switch 801. The DC power is stepped down and output to the load, and the step-down ratio is determined by the second controller 802. The second controller 802 outputs a control signal to drive the ninth switch tube 801 to perform the on-off operation according to the corresponding duty ratio, so The switching duty ratio of the nine-switch 801 determines the step-down ratio of the buck buck circuit.

The ninth switch tube 801 can be a MOS transistor (including an NMOS transistor and a PMOS transistor), an IGBT, or other semiconductor device having a switching characteristic. When the ninth switch 801 is a MOS transistor or an IGBT, the gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled terminal, an input terminal, and an output terminal of the ninth switch transistor 801. The second controller 802 can be a microcontroller or a pulse width modulator.

In summary, in the embodiment, by adding the above-mentioned buck unit 800 to the non-isolated voltage stabilizing current sharing circuit, the buck processing can be realized under the condition of high input voltage to output the direct current corresponding to the load working voltage range, so The non-isolated regulated current sharing circuit provided by the embodiment can be applied to both low input voltage (such as 48V low voltage) and high input voltage (such as 400V high voltage) application scenarios.

Example 6:

In the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 9, FIG. 10, FIG. 11 and FIG. 12, the non-isolated voltage-stabilizing current sharing circuit provided in this embodiment is as shown in FIG. 14, FIG. 15, FIG. 16 and FIG. As shown in FIG. 17, the buck unit 800 further has a buck control terminal, and the buck control terminal of the buck unit 800 is connected to the first controller 100.

As shown in FIG. 18, the buck unit 800 includes a tenth switch 803, an eighth inductor L8, a second diode D12, and a second capacitor C12.

The input end of the tenth switch 803 is the input end of the buck unit 800, the output end of the tenth switch 803 and the cathode of the second diode D12 are connected to the first end of the eighth inductor L8, and the eighth inductor L8 The common junction of the second end and the first end of the second capacitor C12 is the output end of the buck unit 800, and the common junction of the anode of the second diode D12 and the second end of the second capacitor C12 is the buck unit 800 At the loop end, the controlled end of the tenth switch 803 is the buck control terminal of the buck unit 800.

The tenth switch tube 803, the eighth inductor L8, the second diode D12, and the second capacitor C12 constitute a buck buck circuit, and the buck buck circuit inputs the input end of the tenth switch tube 803. The DC power is stepped down and output to the load, and the step-down ratio is determined by the first controller 100. The first controller 100 outputs a control signal to drive the tenth switch tube 803 to perform the on-off operation according to the corresponding duty ratio, so The switching duty of the ten-switch 803 determines the step-down ratio of the buck buck circuit.

The tenth switch tube 803 may be a MOS transistor (including an NMOS transistor and a PMOS transistor), an IGBT, or other semiconductor device having a switching characteristic. When the tenth switch 803 is a MOS transistor or an IGBT, the gate, the source and the drain of the MOS transistor or the IGBT are respectively the controlled end, the input end and the output end of the tenth switch tube 803.

Example 7:

3, 3, 5, 7, 9, 10, 11, 12, 14, 15, 16, and 17 The non-isolated voltage-stabilizing current sharing circuit provided in this embodiment further includes a filter capacitor C1.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 1, as shown in FIG. 19, the filter capacitor C1 is connected between the output end and the loop end of the first voltage-stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output from the current sharing unit 200 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 3, as shown in FIG. 20, the filter capacitor C1 is connected between the output end and the loop end of the first voltage-stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output by the current sharing unit 200 and the second voltage stabilizing current sharing unit 600 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 5, as shown in FIG. 21, the filter capacitor C1 is connected between the output end and the loop end of the first voltage-stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output from the current sharing unit 200 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 7, as shown in FIG. 22, the filter capacitor C1 is connected between the output end and the loop end of the first voltage-stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output by the current sharing unit 200 and the third voltage stabilizing current sharing unit 700 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 9, as shown in FIG. 23, the filter capacitor C1 is connected between the output end and the loop end of the first voltage-stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output from the current sharing unit 200 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 10, as shown in FIG. 24, the filter capacitor C1 is connected between the output end and the loop end of the first voltage stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output by the current sharing unit 200 and the second voltage stabilizing current sharing unit 600 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 11, as shown in FIG. 25, the filter capacitor C1 is connected between the output end and the loop end of the first voltage-stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output from the current sharing unit 200 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 12, as shown in FIG. 26, the filter capacitor C1 is connected between the output end and the loop end of the first voltage stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output by the current sharing unit 200 and the third voltage stabilizing current sharing unit 700 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 14, as shown in FIG. 27, the filter capacitor C1 is connected between the output end and the loop end of the first regulated current sharing unit 200, and the filter capacitor C1 is applied to the first voltage regulator. The DC power output from the current sharing unit 200 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 15, as shown in FIG. 28, the filter capacitor C1 is connected between the output end and the loop end of the first voltage-stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output by the current sharing unit 200 and the second voltage stabilizing current sharing unit 600 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 16, as shown in FIG. 29, the filter capacitor C1 is connected between the output end and the loop end of the first regulated current sharing unit 200, and the filter capacitor C1 is applied to the first voltage regulator. The DC power output from the current sharing unit 200 performs filtering processing.

Based on the non-isolated voltage-stabilizing current sharing circuit shown in FIG. 17, as shown in FIG. 30, the filter capacitor C1 is connected between the output end and the loop end of the first voltage stabilizing current sharing unit 200, and the filter capacitor C1 is connected to the first voltage regulator. The DC power output by the current sharing unit 200 and the third voltage stabilizing current sharing unit 700 performs filtering processing. In summary, the non-isolated voltage-stabilizing current sharing circuit provided by the embodiment of the invention can maintain a stable output voltage and output current without being limited by the input voltage difference, thereby improving the power supply efficiency.

The utility model comprises an existing plurality of power supply circuits, a current shunt circuit and a plurality of current sharing current circuits, wherein the current shunt circuit shunts the output current of the power supply circuit and outputs the current to the current sharing current circuit, and the current sharing in the current sharing current circuit The circuit module combines any two currents output by the current shunt circuit to output a first direct current Vin+. The power supply system further includes a non-isolated voltage-stabilizing current sharing circuit as shown in FIG. 1 to FIG. 30. The first inductor L1 in the non-isolated voltage-stabilizing current sharing circuit is connected to the first direct current power Vin+ from the current combining module.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A non-isolated voltage-stabilizing current sharing circuit includes a first controller, wherein the non-isolated voltage-stabilizing current sharing circuit further includes:

a first inductor, a second inductor, a first regulated current sharing unit, a voltage sampling unit, and a current sampling unit;

The first end of the first inductor is connected to the first direct current, the first end of the second inductor is outputting the second direct current, and the second end of the first inductor and the second end of the second inductor are respectively connected a first input end and a second input end of the first voltage stabilizing current sharing unit, wherein an output end of the first voltage stabilizing current sharing unit outputs a direct current to a load, and an input end and an output end of the voltage sampling unit are respectively connected An output end of the first voltage stabilizing current sharing unit and the first controller, a first sampling end of the current sampling unit receives a loop current output by a load, and a second sampling end and an output end of the current sampling unit Connecting the loop end of the first voltage stabilizing current sharing unit and the first controller, and the first controller is further connected to a DC power regulating end of the first voltage stabilizing current sharing unit;

Discharging the first direct current to the first regulated current sharing unit, and the first regulated current sharing unit outputs the direct current outputted by the first inductor to The load, the loop current output by the load is continuously outputted to the second inductor through the first regulated current sharing unit, and the second inductor outputs the energy after the loop current is stored a direct current, the current value of the second direct current is equal to a current value of the first direct current; the voltage sampling unit samples an output voltage of the non-isolated stabilized current sharing circuit, and feeds back a voltage sampling signal to the a first controller, the current sampling unit performs current sampling on the loop current, and feeds back a current sampling signal to the first controller, the first controller according to the voltage sampling signal and the current sampling signal Outputting a first control signal to the first regulated current sharing unit; when an output voltage of the non-isolated regulated current sharing circuit is greater than a preset current sharing voltage value and/or the loop current is greater than a preset current sharing current value The first regulated current sharing unit reduces an output voltage and/or an output current of the non-isolated regulated current sharing circuit according to the first control signal; when the output of the non-isolated regulated current sharing circuit When the voltage is less than the preset current sharing voltage value and/or the loop current is less than the preset current sharing current value, the first voltage stabilizing current sharing unit increases the non-isolation according to the first control signal The output voltage and / or output current of the regulated current sharing circuit.
The non-isolated voltage-stabilizing current sharing circuit of claim 1 , wherein the non-isolated voltage-stabilizing current sharing circuit further comprises a third inductor, a fourth inductor, and a second voltage-stabilizing current sharing unit;

The first end of the third inductor and the first end of the fourth inductor are respectively connected to the first end of the first inductor and the first end of the second inductor, and the second end of the third inductor And the second end of the fourth inductor is respectively connected to the first input end and the second input end of the second voltage stabilizing current sharing unit, and the DC power regulating end of the second voltage stabilizing current sharing unit is connected to the first The controller is connected, and the output end and the loop end of the second voltage stabilizing current sharing unit are respectively connected to the output end and the loop end of the first voltage stabilizing current sharing unit;

The first voltage stabilizing current sharing unit and the second voltage stabilizing current sharing unit are alternately operated under the control of the first controller; the third inductor is configured to store the energy after the first direct current is stored. Three direct current to the second regulated current sharing unit, when the second regulated current sharing unit is operated, the second regulated current sharing unit outputs the third direct current to the load, The loop current outputted by the load is continuously outputted to the fourth inductor through the second regulated current sharing unit, and the fourth inductor stores the fourth direct current after storing the loop current, the fourth The current value of the direct current is equal to the current value of the third direct current; the first controller outputs the first control signal and the second control signal to the first according to the voltage sampling signal and the current sampling signal respectively a regulated current sharing unit and the second regulated current sharing unit; when an output voltage of the non-isolated regulated current sharing circuit is greater than the preset current sharing voltage value and/or the loop current is greater than the preset When the current is equal to the current value, the first regulated current sharing And the second regulated current sharing unit alternately operates according to the first control signal and the second control signal to reduce an output voltage and/or an output current of the non-isolated regulated current sharing circuit; When the output voltage of the non-isolated voltage stabilizing current sharing circuit is less than the preset current sharing voltage value and/or the loop current is less than the preset current sharing current value, the first voltage stabilizing current sharing unit and the The second regulated current sharing unit alternates between the first control signal and the second control signal to increase an output voltage and/or an output current of the non-isolated regulated current sharing circuit, respectively.
The non-isolated voltage stabilizing current sharing circuit according to claim 1, wherein the first freewheeling control terminal and the second freewheeling control terminal of the first regulated current sharing unit are further connected to the first controller connection.
The non-isolated voltage-stabilizing current sharing circuit of claim 3, wherein the non-isolated voltage-stabilizing current sharing circuit further comprises a fifth inductor, a sixth inductor, and a third regulated current sharing unit;

The first end of the fifth inductor and the first end of the sixth inductor are respectively connected to the first end of the first inductor and the first end of the second inductor, and the second end of the fifth inductor And the second end of the sixth inductor is respectively connected to the first input end and the second input end of the third voltage stabilizing current sharing unit, and the DC power regulating end of the third voltage stabilizing current sharing unit and the first freewheeling The control terminal and the second freewheeling control terminal are both connected to the first controller, and the output end and the loop end of the third voltage stabilizing current sharing unit are respectively connected to the output end and the loop end of the first voltage stabilizing current sharing unit ;

The first voltage stabilizing current sharing unit and the third voltage stabilizing current sharing unit are alternately operated under the control of the first controller; the fifth inductor performs energy storage and outputting the first direct current Five direct current to the third regulated current sharing unit, when the third regulated current sharing unit is operated, the third regulated current sharing unit outputs the fifth direct current freewheeling to the load, The loop current outputted by the load is continuously outputted to the sixth inductor through the third regulated current sharing unit, and the sixth inductor stores the sixth direct current after storing the loop current, the sixth The current value of the direct current is equal to the current value of the fifth direct current; the first controller outputs the first control signal and the third control signal to the first according to the voltage sampling signal and the current sampling signal respectively a regulated current sharing unit and the third regulated current sharing unit; when an output voltage of the non-isolated regulated current sharing circuit is greater than the preset current sharing voltage value and/or the loop current is greater than the preset When the current is equal to the current value, the first regulated current sharing And the third regulated current sharing unit alternately operates according to the first control signal and the third control signal to reduce an output voltage and/or an output current of the non-isolated regulated current sharing circuit; When the output voltage of the non-isolated voltage stabilizing current sharing circuit is less than the preset current sharing voltage value and/or the loop current is less than the preset current sharing current value, the first voltage stabilizing current sharing unit and the The third regulated current sharing unit alternates between the first control signal and the third control signal to increase an output voltage and/or an output current of the non-isolated regulated current sharing circuit, respectively.
The non-isolated voltage-stabilizing current sharing circuit according to any one of claims 1 to 4, wherein the non-isolated voltage-stabilizing current sharing circuit further comprises a filter capacitor, wherein the filter capacitor is connected to the first voltage regulator Between the output of the current sharing unit and the loop end.
The non-isolated voltage-stabilizing current sharing circuit according to any one of claims 1 to 4, wherein the non-isolated voltage-stabilizing current sharing circuit further comprises a buck unit, an input end and a loop end of the buck unit The output end of the first voltage stabilizing current sharing unit and the first sampling end of the current sampling unit are respectively connected, and the buck unit performs a step-down processing on the DC power input to the input end thereof and outputs the output through the output end thereof.
The non-isolated voltage-stabilizing current sharing circuit according to claim 6, wherein the non-isolated voltage-stabilizing current sharing circuit further comprises a filter capacitor, wherein the filter capacitor is connected to an output of the first voltage-stabilizing current sharing unit Between the end and the loop end.
The non-isolated voltage stabilizing current sharing circuit according to claim 6, wherein the buck control terminal of the buck unit is further connected to the first controller.
The non-isolated voltage-stabilizing current sharing circuit according to claim 8, wherein the non-isolated voltage-stabilizing current sharing circuit further comprises a filter capacitor, wherein the filter capacitor is connected to an output of the first voltage-stabilizing current sharing unit Between the end and the loop end.
The non-isolated voltage stabilizing current sharing circuit of claim 1 , wherein the first voltage stabilizing current sharing unit comprises:

a first isolation transformer, a first switching transistor, a first freewheeling diode, and a second freewheeling diode;

a first end of the primary winding of the first isolation transformer is a DC power regulation end of the first voltage stabilizing current sharing unit, and a second end of the primary winding of the first isolation transformer is connected to the first controller The first end and the second end of the secondary winding of the first isolation transformer are respectively connected to the controlled end and the input end of the first switch tube, and the output end of the first switch tube and the first end a common junction of an anode of a freewheeling diode is a first input end of the first voltage stabilizing current sharing unit, and a common junction of an input end of the first switching transistor and a cathode of the second freewheeling diode is The second input end of the first voltage stabilizing current sharing unit, the cathode of the first freewheeling diode and the anode of the second freewheeling diode are respectively an output end and a loop end of the first voltage stabilizing current sharing unit.
The non-isolated voltage stabilizing current sharing circuit according to claim 2, wherein the structure of the first voltage stabilizing current sharing unit is the same as the structure of the second voltage stabilizing current sharing unit;

The first regulated current sharing unit includes:

a first isolation transformer, a first switching transistor, a first freewheeling diode, and a second freewheeling diode;

a first end of the primary winding of the first isolation transformer is a DC power regulation end of the first voltage stabilizing current sharing unit, and a second end of the primary winding of the first isolation transformer is connected to the first controller The first end and the second end of the secondary winding of the first isolation transformer are respectively connected to the controlled end and the input end of the first switch tube, and the output end of the first switch tube and the first end a common junction of an anode of a freewheeling diode is a first input end of the first voltage stabilizing current sharing unit, and a common junction of an input end of the first switching transistor and a cathode of the second freewheeling diode is a second input end of the first voltage stabilizing current sharing unit, a cathode of the first freewheeling diode and an anode of the second freewheeling diode respectively being an output end and a loop end of the first voltage stabilizing current sharing unit;

The second regulated current sharing unit includes:

a second isolation transformer, a second switching transistor, a third freewheeling diode, and a fourth freewheeling diode;

a first end of the primary winding of the second isolation transformer is a DC regulation terminal of the second regulated current sharing unit, and a second end of the primary winding of the second isolation transformer is connected to the first controller The first end and the second end of the secondary winding of the second isolation transformer are respectively connected to the controlled end and the input end of the second switch tube, and the output end of the second switch tube and the first end a common junction of the anode of the three freewheeling diode is a first input end of the second regulated current sharing unit, and a common junction of an input end of the second switching transistor and a cathode of the fourth freewheeling diode is The second input end of the second regulated current sharing unit, the cathode of the third freewheeling diode and the anode of the fourth freewheeling diode are respectively an output end and a loop end of the second regulated current sharing unit.
The non-isolated voltage stabilizing current sharing circuit of claim 3, wherein the first voltage stabilizing current sharing unit comprises:

a third isolation transformer, a third switching tube, a fourth isolation transformer, a fourth switching tube and a fifth switching tube;

a first end of the primary winding of the third isolation transformer is a DC regulation terminal of the first voltage stabilizing current sharing unit, and a second end of the primary winding of the third isolation transformer is connected to the first controller The first end and the second end of the secondary winding of the third isolation transformer are respectively connected to the controlled end and the input end of the third switch tube, and the output end of the third switch tube and the first end a common contact of the input end of the four switch tubes is a first input end of the first voltage stabilizing current sharing unit, and a common contact point between the input end of the third switch tube and the output end of the fifth switch tube is the first a second input end of the voltage stabilizing current sharing unit, a first end of the primary winding of the fourth isolation transformer is a first freewheeling control end of the first regulated current sharing unit, and a primary of the fourth isolation transformer a second end of the winding and the first controller are connected to the ground, and the first end and the second end of the secondary winding of the fourth isolation transformer are respectively connected to the controlled end and the input end of the fourth switch tube The controlled end of the fifth switch tube is the first regulated current sharing unit The control input of the second freewheel terminal, an output terminal of the fourth switch and the fifth switch are respectively the first tube current-regulator unit and the output terminal end of the loop.
The non-isolated voltage stabilizing current sharing circuit according to claim 4, wherein the structure of the first voltage stabilizing current sharing unit is the same as the structure of the third voltage stabilizing current sharing unit;

The first regulated current sharing unit includes:

a third isolation transformer, a third switching tube, a fourth isolation transformer, a fourth switching tube and a fifth switching tube;

a first end of the primary winding of the third isolation transformer is a DC regulation terminal of the first voltage stabilizing current sharing unit, and a second end of the primary winding of the third isolation transformer is connected to the first controller The first end and the second end of the secondary winding of the third isolation transformer are respectively connected to the controlled end and the input end of the third switch tube, and the output end of the third switch tube and the first end a common contact of the input end of the four switch tubes is a first input end of the first voltage stabilizing current sharing unit, and a common contact point between the input end of the third switch tube and the output end of the fifth switch tube is the first a second input end of the voltage stabilizing current sharing unit, a first end of the primary winding of the fourth isolation transformer is a first freewheeling control end of the first regulated current sharing unit, and a primary of the fourth isolation transformer a second end of the winding and the first controller are connected to the ground, and the first end and the second end of the secondary winding of the fourth isolation transformer are respectively connected to the controlled end and the input end of the fourth switch tube The controlled end of the fifth switch tube is the first regulated current sharing unit A second freewheeling control terminal, the output terminal of the fourth switch and an input terminal of the fifth switch tube are respectively the first flow regulator and an output terminal end of the loop unit;

The third regulated current sharing unit includes:

a fifth isolation transformer, a sixth switching tube, a sixth isolation transformer, a seventh switching tube and an eighth switching tube;

a first end of the primary winding of the fifth isolation transformer is a DC regulation terminal of the third regulated current sharing unit, and a second end of the primary winding of the fifth isolation transformer is connected to the first controller The first end and the second end of the secondary winding of the fifth isolation transformer are respectively connected to the controlled end and the input end of the sixth switch tube, and the output end of the sixth switch tube and the first end a common contact of the input end of the seventh switch tube is a first input end of the third regulated current sharing unit, and a common contact point between the input end of the sixth switch tube and the output end of the eighth switch tube is the third a second input end of the constant current sharing unit, a first end of the primary winding of the sixth isolation transformer is a first freewheeling control end of the third regulated current sharing unit, and a primary of the sixth isolation transformer a second end of the winding and the first controller are connected to the ground, and the first end and the second end of the secondary winding of the sixth isolation transformer are respectively connected to the controlled end and the input end of the seventh switch tube The controlled end of the eighth switch tube is the third regulated current sharing unit The control input of the second freewheel terminal, an output terminal of said seventh switch and the eighth switch are respectively the third current-regulator unit and the output terminal end of the loop.
The non-isolated voltage-stabilizing current sharing circuit according to any one of claims 1 to 4, wherein the voltage sampling unit comprises a first resistor and a second resistor, and the first end of the first resistor is the The input end of the voltage sampling unit, the common end of the second end of the first resistor and the first end of the second resistor is an output end of the voltage sampling unit, and the second end of the second resistor is grounded.
The non-isolated voltage stabilizing current sharing circuit according to any one of claims 1 to 4, wherein the current sampling unit comprises a third resistor and a differential amplifier, the first end of the third resistor and the difference a common junction of the first input end of the amplifier is a first sampling end of the current sampling unit, and a common junction of the second end of the third resistor and the second input end of the differential amplifier is a second of the current sampling unit At the sampling end, an output end of the differential amplifier is an output end of the current sampling unit, and a positive power supply terminal and a negative power supply terminal of the differential amplifier are respectively connected to a DC power supply and a ground.
The non-isolated voltage-stabilizing current sharing circuit according to claim 6, wherein the step-down unit comprises:

a ninth switch tube, a seventh inductor, a first diode, a first capacitor, and a second controller;

An input end of the ninth switch is an input end of the buck unit, and an output end of the ninth switch is connected to a cathode of the first diode to a first end of the seventh inductor a common junction of the second end of the seventh inductor and the first end of the first capacitor is an output end of the buck unit, an anode of the first diode and a first capacitor The common junction of the two ends is the loop end of the buck unit, and the controlled end of the ninth switch is connected to the second controller.
The non-isolated voltage-stabilizing current sharing circuit according to claim 8, wherein the step-down unit comprises:

a tenth switch tube, an eighth inductor, a second diode, and a second capacitor;

An input end of the tenth switch tube is an input end of the buck unit, and an output end of the tenth switch tube is connected to a cathode of the second diode to a first end of the eighth inductor a common junction of the second end of the eighth inductor and the first end of the second capacitor is an output end of the buck unit, and an anode of the second diode and a second capacitor The common junction of the two ends is the loop end of the buck unit, and the controlled end of the tenth switch is the buck control end of the buck unit.
The non-isolated voltage-stabilizing current sharing circuit according to claim 10, wherein the first switching transistor is a MOS transistor or an IGBT;

The gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled end, an input end and an output end of the first switch tube.
The non-isolated voltage-stabilizing current sharing circuit according to claim 11, wherein the first switching transistor and the second switching transistor are the same type of semiconductor switching transistor, and the semiconductor switching transistor is a MOS transistor or an IGBT. The gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled end, an input end and an output end of the semiconductor switch tube.
The non-isolated voltage stabilizing current sharing circuit according to claim 12, wherein said third switching transistor, said fourth switching transistor and said fifth switching transistor are the same type of semiconductor switching transistor, said semiconductor The switching transistor is a MOS transistor or an IGBT, and the gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled end, an input end and an output end of the semiconductor switching tube
The non-isolated voltage stabilizing current sharing circuit according to claim 13, wherein said third switching transistor, said fourth switching transistor, said fifth switching transistor, said sixth switching transistor, said said The seventh switch tube and the eighth switch tube are the same type of semiconductor switch tube, the semiconductor switch tube is a MOS tube or an IGBT, and the gate, the source and the drain of the MOS tube or the IGBT are respectively The controlled end, the input end and the output end of the semiconductor switch tube.
The non-isolated voltage-stabilizing current sharing circuit according to claim 16, wherein the ninth switching transistor is a MOS transistor or an IGBT;

The gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled end, an input end and an output end of the ninth switch tube.
The non-isolated voltage-stabilizing current sharing circuit according to claim 17, wherein the tenth switching transistor is a MOS transistor or an IGBT;

The gate, the source and the drain of the MOS transistor or the IGBT are respectively a controlled end, an input end and an output end of the tenth switch tube.
A power supply system includes a plurality of power supply circuits, a current shunt circuit, and a plurality of current sharing circuits, wherein the current shunt circuit shunts an output current of the power supply circuit and outputs the current to the current sharing circuit. The current combining module in the current sharing circuit combines any two currents output by the current dividing circuit to output a first direct current, wherein the power supply system further includes the 4. The non-isolated voltage-stabilizing current sharing circuit according to any one of clauses 7 to 13, wherein the first inductor in the non-isolated voltage-stabilizing current sharing circuit is connected to the first one from the current combining module. DC power.