CN101908762A - Pre-processing circuit for power supply - Google Patents
Pre-processing circuit for power supply Download PDFInfo
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- CN101908762A CN101908762A CN 201010241663 CN201010241663A CN101908762A CN 101908762 A CN101908762 A CN 101908762A CN 201010241663 CN201010241663 CN 201010241663 CN 201010241663 A CN201010241663 A CN 201010241663A CN 101908762 A CN101908762 A CN 101908762A
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Abstract
The invention relates to a pre-processing circuit for a power supply. The circuit comprises a spike killer circuit, a protective circuit, an isolating circuit and a control circuit, wherein the spike killer circuit is connected in parallel on a power transmission line at the power supply end; the protective circuit and the isolating circuit are connected in series on a power transmission line for a DC/DC conversion module; and the control circuit controls the state of the protective circuit. The pre-processing circuit for the power supply solves the technical problems of limited application range, high power loss and poor protective effect of the existing pre-processing circuit for the power supply and has the advantages of broad application range, low power loss, good protective effect and short response time.
Description
Technical field
The present invention relates to a kind of power source preprocessing circuit.
Background technology
Continuous progress and development along with air environment, overvoltage surge, transient peak surge etc. " electropollution " have become one and have had a strong impact on that power consumption equipment uses and the problem of the important realization that damages, certain model task requires development to satisfy the related request power supply to the aviation ruggedized computer, to have configuration flexibly simultaneously, satisfy the requirement of fail safe, thermal diffusivity, reliability and electromagnetic compatibility aspect.In certain airborne equipment computer, the major function of power module is to realize power source conversion, and the last supply voltage of machine is converted to the various direct voltages that computer needs.Because this model aircraft electric power thus supplied complexity, there are a series of problems such as conducted noise, magnetic field radiation interference, overvoltage surge, spike surge, under-voltage surge, wherein can cause the subject matter of catastrophe failures such as power module and electricity consumption module damage is overvoltage surge and spike surge, present different aircraft has dissimilar electric power systems, the standard of carrying out is also different, difference according to service condition, adopt preconditioning technique before the power transfer of the being everlasting functional module, commonly used have piezo-resistance (VSR) method and a TVS method.
Referring to Fig. 1, piezo-resistance (VSR) method can be by at the power module input and meet one group of piezo-resistance VSR (Voltage Sensitiv resistor) when output loading is light, and scheme is as shown in Figure 1 handled surge.Piezo-resistance VSR is an over-voltage protection element, shock resistance electric current very capable, and through-current capacity can reach 100A～20KA; Leakage current is lower than several to tens microamperes, working stability, and temperature coefficient of resistance is lower than 0.05%/℃.Piezo-resistance is to be the Metal-oxide-semicondutor ceramic component that main material is made with zinc oxide (ZnO), and its resistance value changes with the variation of voltage.
Referring to Fig. 2, transient state diode TVS (Transient Voltage Suppressor) method is when output loading is light, can seal in a two-port network at input, we will note the rated power (P) of resistance R here, satisfy the resistance power consumption (I when normal power supply input current (I)
2R) less than P.During surge, voltage will be clamped at the setting voltage of high-power TVS, and surge power is consumed on resistance (R) and the TVS pipe, reach our design load.This scheme is primarily aimed at the situation of small-power input, not only can suppress the overvoltage surge of short time, and can the transient suppression spike.
In actual applications, piezo-resistance (VSR) method and transient state diode (TVS) method can only be used in underloading, and range of application is narrow; Power loss is big during normal the use; The protection effect is limited; Also influence speed.
Summary of the invention
In order to solve existing power source preprocessing circuit range of application limitation, big, the bad technical problem of protection effect of power loss, the invention provides a kind of power source preprocessing circuit.
Technical scheme of the present invention is as follows:
A kind of power source preprocessing circuit, its special character is: this circuit comprises that spike suppresses circuit, protective circuit, buffer circuit, control circuit; Described spike suppresses circuit and is parallel on the power supply buses of feeder ear; Described protective circuit and buffer circuit are series on the power supply buses of DC/DC modular converter; The state of described control circuit control protection electric circuit.
Above-mentioned power source preprocessing circuit also comprises the accessory power supply that is used for to the control circuit power supply.
Above-mentioned accessory power supply comprises pressure unit 2.
Above-mentioned control circuit comprises voltage regulation unit 3 and the driver element 4 that connects successively, described voltage regulation unit 3 is to be used for providing stable voltage according to the driver element needs, and described driver element 4 is the foldings that are used for by the pressure differential protective circuit of self voltage and protective circuit output end voltage; The input of described voltage regulation unit 3 is connected with the pressure unit of accessory power supply 2, and the output of described driver element 4 is connected with protective circuit.
Above-mentioned protective circuit is made up of field effect transistor 5, the D termination bus of described field effect transistor 5, the input of the S termination buffer circuit of field effect transistor 5, the G termination control circuit of field effect transistor 5.
Above-mentioned spike suppresses circuit and is composed in series by two reverse Transient Suppression Diodes 1.
Above-mentioned isolated location is made up of isolating diode 6.
Foregoing circuit also comprises the fuse 7 that being used between feeder ear and spike inhibition circuit prevents that fault from spreading.
The advantage that has of the present invention:
1, applied range: the present invention in whole pre-process circuit spike is suppressed circuit and protective circuit combines, and both can finish the processing of spike surge, can finish the processing of overvoltage surge again, applied range.
2, power loss is little: the present invention is in the normal power supply scope, and spike suppresses circuit and is in open-circuit condition, the noenergy loss; Protective circuit is in the Low ESR conducting state, and conduction impedance is the milliohm level, and power loss is very low, satisfies the requirement of fail safe, thermal diffusivity and reliability aspect.
3, protection is effective: the mode that clamp circuit method of the present invention adopts comprehensive layering to handle step by step, and the spike surge that voltage is higher, the time is short suppresses circuit clamper, absorption by spike; Overvoltage surge that voltage is lower, the time is long and the unabsorbed peak voltage of spike inhibitor are by protective circuit clamper, absorption.
4, the response time is than very fast: the time of overvoltage surge of the present invention is Millisecond, and the response time that the spike in the clamp circuit method suppresses circuit, protective circuit is the microsecond level, satisfies the response time requirement to the overvoltage surge.
Description of drawings
Fig. 1 is existing piezo-resistance method circuit diagram;
Fig. 2 is the circuit diagram of existing transient state diode method;
Fig. 3 is the schematic diagram of power source preprocessing circuit of the present invention;
Fig. 4 is a power source preprocessing circuit principle schematic of the present invention;
Wherein Reference numeral is: 1-Transient Suppression Diode, 2-pressure unit, 3-voltage regulation unit, 4-driver element, 5-field effect cell, 6-isolating diode, 7-fuse.
Embodiment
As shown in Figure 3, the structure of whole electric power system is a feeder ear, power source preprocessing circuit, DC/DC modular converter and power consumption equipment, it is of the present invention that what relate generally to is power source preprocessing circuit, power source preprocessing circuit of the present invention comprise be used for clamper and absorb voltage higher, time is the spike inhibition circuit of short spike surge, be used for clamper and absorb voltage lower, overvoltage surge that time is long and spike suppress the protective circuit of the unabsorbed peak voltage of circuit, be used to isolate the buffer circuit of power consumption equipment and feeder ear fault delivery, be used for providing the control circuit of driving to protective circuit; Spike suppresses circuit and is parallel on the power supply buses of feeder ear; Protective circuit and buffer circuit are series on the power supply buses of DC/DC modular converter end; Control circuit is realized the control to the protective circuit state by the bus of feeder ear is sampled.
As shown in Figure 4: spike suppresses circuit and is composed in series by two reverse Transient Suppression Diodes 1.Protective circuit is made up of field effect transistor 7, the D termination bus of field effect transistor 5, the input of the S termination buffer circuit of field effect transistor 5, the G termination control circuit of field effect transistor 5.
For circuit structure is simple, is convenient to integrated power source preprocessing circuit of the present invention and also comprises the accessory power supply that is used for to the control circuit power supply.Accessory power supply comprises the pressure unit 2 that connects successively.
Control circuit comprises voltage regulation unit 3 and the driver element 4 that connects successively, voltage regulation unit 3 is to be used for providing stable voltage according to the driver element needs, and driver element 4 is the foldings that are used for by the pressure differential protective circuit of self voltage and protective circuit output end voltage; The input of voltage regulation unit 3 is connected with the pressure unit of accessory power supply 2, and the output of driver element 4 is connected with protective circuit.When being input as 28V, just be output as 12V through pressure unit 2, be output as 36V through voltage regulation unit 3 then, finish power supply by step-down and voltage stabilizing to driver element.
Isolated location is made up of isolating diode 6.Circuit also comprises the fuse 7 that being used between feeder ear and spike inhibition circuit prevents that fault from spreading.
Embodiment:
Power source preprocessing circuit of the present invention mainly is at overvoltage surge and spike surge problem, and the surge voltage of spike surge is 600V to the maximum, and to continue maximum time be 10us, and the surge voltage of overvoltage surge is 80V to the maximum, and to continue maximum time be 50ms.Constitute, form reason, the mode that the clamp circuit method adopts comprehensive layering to handle step by step according to overvoltage surge and spike surge energy.28V powers just often, and spike suppresses circuit and presents open-circuit condition.
When the driver element output of control circuit just within the scope of voltage pressure difference in set point at the voltage at field effect transistor G place and field effect transistor S place; then the control protection electric circuit control protection electric circuit is in the Low ESR conducting state; the conduction impedance of protective circuit is the milliohm level; power loss is very low; power supply 28V voltage is not almost had influence, can guarantee normal power supply.
When the driver element output of control circuit is just within the scope of voltage pressure difference in set point at the voltage at field effect transistor G place and field effect transistor S place; just during the overtension at field effect transistor S place; the situation that the overvoltage surge just occurs; control circuit is in the clamping state of high resistant by the pressure differential protective circuit; absorption exceeds the energy of default definite value, is in the Low ESR conducting state afterwards again.
Specific as follows:
Wherein, overvoltage surge clamper principle of absorption is as follows: during the overvoltage surge (80V/50ms) of occur at feeder ear that voltage is lower, the time is long; spike suppresses circuit and presents open-circuit condition; the control circuit control protection electric circuit; make this circuit be in the clamping state of high resistant; absorption exceeds the energy of the default definite value of 32V, and protective circuit and shielded power consumption equipment are that series relationship can obtain formula 1, through the energy P of conversion protective circuit dissipation
ConsumptionWith power consumption equipment electric power P
Go outRelation can calculate by formula 2, according to this relation, just can be according to the device parameters in the power consumption equipment electric power flexible configuration protective circuit.
Spike surge clamper principle of absorption is as follows:
It is higher voltage to occur at feeder ear; time is during short spike surge (600V/10us); rely on the spike inhibition circuit of front end to come clamper to absorb the energy that exceeds set point (80V); it is relation in parallel with shielded power consumption equipment that spike suppresses circuit; the internal resistance meeting that spike suppresses circuit sharply diminishes; the high pressure branch of the overwhelming majority is poured off; requirement according to anti-peak voltage test; the internal impedance of power supply is 50 ohm; the peak voltage of spike test is 600V; setting is suppressed at the scope of 80V with peak voltage, and the impedance that spike suppresses circuit this moment can be obtained by formula 3:
Can obtain as calculated:
R
TVS=7.7 ohm
Can calculate the dissipation power P of spike inhibition this moment circuit according to formula 4
TVS:
According to design derate principle, the actual transient state maximum power of choosing Transient Suppression Diode is 1500W.According to the principle that the substep clamper absorbs,, then finish by the protective circuit that is connected in the current supply circuit for this part energy below the 80V.
Principle of the present invention:
Circuit provided by the present invention is according to " modularization " principle, the mode that layering is handled is step by step taken all factors into consideration in employing, between input of powering and power consumption equipment, seal in a step-down two port function circuit units, form a divider wall, supply lines is conducted the overvoltage surge and the spike surge of coming in present high-impedance state, this part high-risk energy is suppressed to consume, and under the normal power supply state, present low resistive state, power loss is very little, and maximum loss all is controlled in 2%.
Claims (8)
1. power source preprocessing circuit is characterized in that: this circuit comprises that spike suppresses circuit, protective circuit, buffer circuit, control circuit; Described spike suppresses circuit and is parallel on the power supply buses of feeder ear; Described protective circuit and buffer circuit are series on the power supply buses of DC/DC modular converter; The state of described control circuit control protection electric circuit.
2. power source preprocessing circuit according to claim 1 is characterized in that: described power source preprocessing circuit also comprises the accessory power supply that is used for to the control circuit power supply.
3. power source preprocessing circuit according to claim 1 and 2 is characterized in that: described accessory power supply comprises pressure unit (2).
4. power source preprocessing circuit according to claim 3, it is characterized in that: described control circuit comprises voltage regulation unit (3) and the driver element (4) that connects successively, described voltage regulation unit (3) is to be used for providing stable voltage according to the driver element needs, and described driver element (4) is the folding that is used for by the pressure differential protective circuit of self voltage and protective circuit output end voltage; The input of described voltage regulation unit (3) is connected with the pressure unit (2) of accessory power supply, and the output of described driver element (4) is connected with protective circuit.
5. power source preprocessing circuit according to claim 4; it is characterized in that: described protective circuit is made up of field effect transistor (5); the D termination bus of described field effect transistor (5), the input of the S termination buffer circuit of field effect transistor (5), the G termination control circuit of field effect transistor (5).
6. power source preprocessing circuit according to claim 5 is characterized in that: described spike suppresses circuit and is composed in series by two reverse Transient Suppression Diodes (1).
7. power source preprocessing circuit according to claim 6 is characterized in that: described isolated location is made up of isolating diode (6).
8. power source preprocessing circuit according to claim 7 is characterized in that: described circuit also comprises the fuse (7) that being used between feeder ear and spike inhibition circuit prevents that fault from spreading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010241663 CN101908762A (en) | 2009-12-22 | 2010-07-30 | Pre-processing circuit for power supply |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910311999A CN101771267A (en) | 2009-12-22 | 2009-12-22 | Power source preprocessing circuit |
| CN200910311999.0 | 2009-12-22 | ||
| CN 201010241663 CN101908762A (en) | 2009-12-22 | 2010-07-30 | Pre-processing circuit for power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101908762A true CN101908762A (en) | 2010-12-08 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910311999A Pending CN101771267A (en) | 2009-12-22 | 2009-12-22 | Power source preprocessing circuit |
| CN 201010241663 Pending CN101908762A (en) | 2009-12-22 | 2010-07-30 | Pre-processing circuit for power supply |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910311999A Pending CN101771267A (en) | 2009-12-22 | 2009-12-22 | Power source preprocessing circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013107320A1 (en) * | 2012-01-20 | 2013-07-25 | 华为技术有限公司 | Surge protection circuit |
| CN103997203A (en) * | 2014-05-28 | 2014-08-20 | 国家电网公司 | Power circuit of electric distribution device temperature rise monitoring device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105302267A (en) * | 2015-12-09 | 2016-02-03 | 浪潮电子信息产业股份有限公司 | Method for reducing surge voltage of power input end of server system |
| US11711003B2 (en) * | 2019-05-31 | 2023-07-25 | MagniX USA, Inc. | High voltage converter for use as electric power supply |
| CN112532031B (en) * | 2020-11-25 | 2023-05-26 | 浪潮电子信息产业股份有限公司 | Computer equipment and surge voltage protection circuit thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6157529A (en) * | 1984-10-24 | 2000-12-05 | Ahuja; Om | Basic surge protector |
| CN2919641Y (en) * | 2006-06-02 | 2007-07-04 | 中国科学院长春光学精密机械与物理研究所 | DC power supply surging suppresser |
| CN101383508A (en) * | 2008-10-27 | 2009-03-11 | 摩比天线技术（深圳）有限公司 | Lightning protection circuit and antenna apparatus |
| CN101499654A (en) * | 2008-10-23 | 2009-08-05 | 天水华天微电子股份有限公司 | Instant voltage peak and instant voltage surge suppressor |
-
2009
- 2009-12-22 CN CN200910311999A patent/CN101771267A/en active Pending
-
2010
- 2010-07-30 CN CN 201010241663 patent/CN101908762A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6157529A (en) * | 1984-10-24 | 2000-12-05 | Ahuja; Om | Basic surge protector |
| CN2919641Y (en) * | 2006-06-02 | 2007-07-04 | 中国科学院长春光学精密机械与物理研究所 | DC power supply surging suppresser |
| CN101499654A (en) * | 2008-10-23 | 2009-08-05 | 天水华天微电子股份有限公司 | Instant voltage peak and instant voltage surge suppressor |
| CN101383508A (en) * | 2008-10-27 | 2009-03-11 | 摩比天线技术（深圳）有限公司 | Lightning protection circuit and antenna apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013107320A1 (en) * | 2012-01-20 | 2013-07-25 | 华为技术有限公司 | Surge protection circuit |
| US9350164B2 (en) | 2012-01-20 | 2016-05-24 | Huawei Technologies Co., Ltd. | Surge protection circuit |
| CN103997203A (en) * | 2014-05-28 | 2014-08-20 | 国家电网公司 | Power circuit of electric distribution device temperature rise monitoring device |
| CN103997203B (en) * | 2014-05-28 | 2017-03-15 | 国家电网公司 | The power circuit of distribution net equipment temperature rise monitoring device |
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| Publication number | Publication date |
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| CN101771267A (en) | 2010-07-07 |
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Application publication date: 20101208 |