CN103384199A - Power supply method, converter and Ethernet power supply system - Google Patents
Power supply method, converter and Ethernet power supply system Download PDFInfo
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- CN103384199A CN103384199A CN2011104596443A CN201110459644A CN103384199A CN 103384199 A CN103384199 A CN 103384199A CN 2011104596443 A CN2011104596443 A CN 2011104596443A CN 201110459644 A CN201110459644 A CN 201110459644A CN 103384199 A CN103384199 A CN 103384199A
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Abstract
The invention discloses a power supply method, a converter and an Ethernet power supply system. The power supply method is suitable for the Ethernet power supply system which comprises power sourcing equipment (PSE), a powered device (PD) and the converter which is composed of at least two power taking openings, at least one power supply opening and at least one converting circuit. The method comprises the steps that the converting circuit detects a power consumption value needed by the power supply opening, the input power needed by the power taken openings connected with the PSE is adjusted according to the power consumption value; after the input power needed by the power taken openings connected with a PSE connector is successfully adjusted, the power acquired by the power taking openings is processed in a combined mode, the combined power is output through the power supply opening, and accordingly electricity is provided for the PD. According to the scheme, the PSE can provide electricity for the PD with the needed power value higher than the power provided by a port of the PD.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method of supplying power to, transducer and Power over Ethernet system.
Background technology
PoE (Power over Ethernet, refer to Power over Ethernet) that in the situation that existing Ethernet connects up base frame without any changes, be some IP-based terminals, such as: IP phone machine, wireless local network connecting point AP, web camera etc., in the time of transmission of data signals, can also provide for described terminal the technology of direct current supply.In prior art, complete PoE system is included as the PSE (Power Sourcing Equipment, power supply unit) of ethernet client power devices and receives PSE load P D (Powered Device, power receiving equipment) two parts of power supply.
PSE is as power supply unit, it can be to PD power supply and signal transmission by common Ethernet, for the Ethernet of 10M/100M, the signal transmission only needs 4 lines (1,2,3,6), and remaining 4 line (4,5,7,8) will be as the power delivery cable.PD receives the supply power voltage from PSE, and utilizes this voltage to start working as power receiving equipment, no longer needs extra power supply adaptor, can save holistic cost and wiring like this.In prior art, the specific implementation of PoE system, as shown in Figure 1.The power supply process of PoE is generally: PSE is at the less voltage of port output, and then export another voltage, variation by two voltage corresponding current obtains a load impedance, if this load impedance within critical field, can judge the PD that has been connected to a standard so.After PD being detected, PSE can according to the size of load impedance, for PD classifies, and assess the required power loss of this PD, and then be its power supply.
Existing PSE is based on IEEE 802.3af standard, and namely each port of PSE supports that maximum power is 15W corresponding to IEEE 802.3af standard.When facing in the situation of the required power consumption of PD greater than 15W, existing PSE can't directly for this PD provides the power supply that meets power requirement, have significant limitation.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of method of supplying power to, transducer and Power over Ethernet system, powers as the PD of required power consumption number higher than power that its port is provided to realize PSE, and technical scheme is as follows:
A kind of method of supplying power to is applicable in the Power over Ethernet system, and described Power over Ethernet system comprises: power supply unit PSE, powered device PD and the transducer that is made of at least two power taking mouths, at least one power supply port and at least one change-over circuit; Described method comprises:
Described change-over circuit detects the required power consumption number of described power supply port, and regulates according to described power consumption number the required input power of power taking mouth that is connected with PSE;
After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output thinks that described PD powers.
Wherein, regulate the required input power of power taking mouth that is connected with PSE according to described power consumption number, be specially:
Described change-over circuit is regulated the input impedance of the power taking mouth that is connected with PSE, to regulate the described required input power of power taking mouth that is connected with PSE according to described power consumption number.
Accordingly, the embodiment of the present invention also provides a kind of transducer, is applicable in the Power over Ethernet system, and described Power over Ethernet system comprises: power supply unit PSE and powered device PD; Described transducer comprises: at least two power taking mouths, at least one power supply port and,
For detection of the required power consumption number of described power supply port, and regulate the required input power of power taking mouth that is connected with PSE according to described power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output is thought the change-over circuit that described PD powers.
The output of the corresponding load of power taking mouth that wherein, is connected with the PSE interface in described change-over circuit closes the Lu Houyu power supply port and is connected.
The embodiment of the present invention also provides a kind of Power over Ethernet system, comprising: power supply unit PSE and powered device PD; Also comprise: transducer:
Described transducer comprises:
At least two power taking mouths, at least one power supply port and, for detection of the required power consumption number of described power supply port, and regulate the required input power of power taking mouth that is connected with PSE according to described power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output is thought the change-over circuit that described PD powers.
The output of the corresponding load of power taking mouth that wherein, is connected with the PSE interface in described change-over circuit closes the Lu Houyu power supply port and is connected.
In the embodiment of the present invention, transducer is connected between PSE and PD; The required power consumption number of power supply port that in this transducer, the conversion electric circuit inspection is connected with PD, and regulate the required input power of power taking mouth that is connected with PSE according to this power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface is regulated successfully, the power that described power taking mouth is obtained merges, and export power after merging by power supply port, and then can realize that PSE powers for the PD of required power consumption number higher than power that its port provides.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do simple the introduction to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the connection diagram of PSE and PD in prior art;
The flow chart of a kind of method of supplying power to that Fig. 2 provides for the embodiment of the present invention;
The electrical block diagram of a kind of transducer that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is another structural representation of transducer shown in Figure 3.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
In order to realize PSE for the PD of required power consumption number higher than power that its port provides powers, the invention provides a kind of method of supplying power to, transducer and Power over Ethernet system.
At first the below is introduced a kind of method of supplying power to provided by the present invention.
Need to prove, method of supplying power to provided by the present invention, be applicable in a Power over Ethernet system, this Power over Ethernet system comprises: power supply unit PSE, powered device PD and the transducer that is made of at least two power taking mouths, at least one power supply port and at least one change-over circuit.Wherein, this transducer is arranged between PSE and PD, and at least two power taking mouths connect respectively a PSE interface, and a power supply port is connected with PD.Be understandable that, when the required power consumption number of PD does not provide power higher than the PSE interface, also can utilize this transducer.At this moment, a power taking mouth is connected with the PSE interface, a power supply port is connected with PD, and this transducer only plays the transfer effect.
As shown in Figure 2, a kind of method of supplying power to can comprise:
S101, the change-over circuit in this transducer detects the required power consumption number of power supply port that is connected with PD;
When PSE powered higher than the PD of power that its interface provides for required power consumption number, at first the change-over circuit in this transducer detected the required power consumption number of power supply port that is connected with this PD, and namely, this change-over circuit detects the required power consumption number of PD.
S102 regulates the required input power of power taking mouth that is connected with PSE according to this power consumption number;
After definite required power consumption number of this power supply port, regulate according to this power consumption number the required input power of power taking mouth that is connected with the PSE interface, so that the PSE input power required according to the power taking mouth carried out the adjusting of PSE interface power output, and then make the required input power of power taking mouth that PSE interface output connects of PSE.
Wherein, when the change-over circuit of this transducer is regulated the required input power of the power taking mouth that is connected with PSE at the power consumption number required according to PD, can the required input power of each power taking mouth that is connected with the PSE interface be set to equate, perhaps the required input power of each power taking mouth that is connected with the PSE interface is set to have other special ratios relations.For example: when two power taking mouths of transducer connect respectively a PSE interface, if it is 20W that change-over circuit detects the required power consumption number of PD, and the power that each PSE interface provides is 15W, at this moment, this change-over circuit can all be set to 10W with two required input powers of power taking mouth, and perhaps, the required input power of power taking mouth is set to 15W, and the required input power of another power taking mouth is set to 5W, and this is all rational.
Need to prove, when the power consumption number required according to PD regulated the required input power of the power taking mouth that is connected with PSE, can according to the different different input Power Distribution ratios of application scenarios selection, be not limited to mode provided by the present invention.
Those skilled in the art are understandable that, because PSE can regulate the power output that the PSE interface provides according to the input impedance of detected load, therefore, change-over circuit in this transducer can be regulated according to detected power consumption number the input impedance of the power taking mouth that is connected with the PSE interface, with the adjusting of realization to power taking mouth required input power, and then make PSE regulate according to the input impedance of power taking mouth the power that corresponding PSE interface provides.Same, this change-over circuit can each power taking mouth that is connected with the PSE interface input impedance be set to equate, so that the input power of each power taking mouth that is connected with the PSE interface equates, perhaps, this change-over circuit can each power taking mouth that is connected with the PSE interface input impedance be set to have other specific proportionate relationships so that the required input power of each power taking mouth that is connected with the PSE interface has this specific proportionate relationship.
Certainly, the mode of regulating the required input power of the power taking mouth that is connected with PSE according to this power consumption number is not limited to mode provided by the present invention, can also select according to the practical application scene other power adjustments mode.
S103, after the required input power of the power taking mouth that is connected with the PSE interface was regulated successfully, the power that each power taking mouth is obtained merged processing;
Because a plurality of power taking mouths carry out the power taking action, and each power taking mouth obtains specific input power, to be that PD powers in order realizing by a power supply port, after the required input power of the power taking mouth that is connected with the PSE interface is regulated successfully, need to merge processing to the power that each power taking mouth obtains.
S104, the power after merging by this power supply port output thinks that this PD powers.
After the power that each power taking mouth is obtained merges processing, the power after can merging by this power supply port output, and then power for PD.
In the embodiment of the present invention, transducer is connected between PSE and PD; The required power consumption number of power supply port that in this transducer, the conversion electric circuit inspection is connected with PD, and regulate the required input power of power taking mouth that is connected with PSE according to this power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface is regulated successfully, the power that described power taking mouth is obtained merges, and export power after merging by power supply port, and then can realize that PSE powers for the PD of required power consumption number higher than power that its port provides.
Accordingly, the present invention also provides a kind of transducer, and it is applicable in the Power over Ethernet system, and this Power over Ethernet system comprises: power supply unit PSE and powered device PD; This transducer comprises: at least two power taking mouths, at least one power supply port and,
For detection of the required power consumption number of described power supply port, and regulate the required input power of power taking mouth that is connected with PSE according to described power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output is thought the change-over circuit that described PD powers.
Transducer provided by the present invention is arranged between PSE and PD, and at least two power taking mouths are connected with respectively a PSE interface, and a power supply port can be connected with PD.During the power that can provide higher than the PSE interface when the required power consumption number of PD, utilize this transducer realize PSE to the process of effective power supply of PD can for: the change-over circuit of this transducer detects the required power consumption number of power supply port that is connected with PD, namely, the required power consumption number of PD; After the required power consumption number of definite power supply port, regulate according to this power consumption number the required input power of power taking mouth that is connected with the PSE interface, so that the PSE power required according to the power taking mouth carries out the adjusting of PSE interface power output, and then make PSE output PSE interface connect the required power of power taking mouth; After the required input power of the power taking mouth that is connected with the PSE interface was regulated successfully, this change-over circuit merged processing with the power that each power taking mouth obtains, and then exported power after this merging by power supply port, finally was embodied as PD and powered.As seen, by utilizing transducer provided by the present invention, can realize that PSE powers for the PD of required power consumption number higher than power that its port provides.
Be understandable that, when the required power consumption number of PD does not provide power higher than the PSE interface, also can utilize transducer provided by the present invention.At this moment, a power taking mouth is connected with the PSE interface, a power supply port is connected with PD, and this transducer only plays the transfer effect.
Wherein, when the change-over circuit of this transducer is regulated the required input power of the power taking mouth that is connected with PSE at the power consumption number required according to PD, can the required input power of each power taking mouth that is connected with the PSE interface be set to equate, perhaps the required input power of each power taking mouth that is connected with the PSE interface is set to have other special ratios relations.For example: when two power taking mouths of transducer connect respectively a PSE interface, if it is 20W that change-over circuit detects the required power consumption number of PD, and the power that each PSE interface provides is 15W, at this moment, this change-over circuit can all be set to 10W with two required input powers of power taking mouth, and perhaps, the required input power of power taking mouth is set to 15W, and the required input power of another power taking mouth is set to 5W, and this is all rational.
Need to prove, when the power consumption number required according to PD regulated the required input power of the power taking mouth that is connected with PSE, can according to the different different input Power Distribution ratios of application scenarios selection, be not limited to mode provided by the present invention.
Those skilled in the art are understandable that, because PSE regulates according to the input impedance of detected load the power output that the PSE interface provides, therefore, change-over circuit in this transducer can be regulated according to detected power consumption number the input impedance of the power taking mouth that is connected with the PSE interface, with the adjusting of realization to power taking mouth required input power, and then make PSE regulate according to the input impedance of power taking mouth the power that corresponding PSE interface provides.Same, this change-over circuit can each power taking mouth that is connected with the PSE interface input impedance be set to equate, so that the input power of each power taking mouth that is connected with the PSE interface is identical, perhaps, this change-over circuit can each power taking mouth that is connected with the PSE interface input impedance be set to have other specific proportionate relationships so that the required input power of each power taking mouth that is connected with the PSE interface has this specific proportionate relationship.
Further, because a plurality of power taking mouths carry out the power taking action, and each power taking mouth obtains specific input power, be that PD powers in order to realize by a power supply port, the output of the corresponding load of power taking mouth that is connected with the PSE interface in this change-over circuit closes the Lu Houyu power supply port and is connected, and merges processing to realize the power that the power taking mouth is obtained.Certainly, the mode that the power that the power taking mouth is obtained merges is not limited to the mode that the present embodiment provides.
Below in conjunction with a specific embodiment, transducer provided by the present invention is introduced.
Transducer as shown in Figure 3, Figure 4, the change-over circuit that it has the first power taking mouth Port1, the second power taking mouth Port2, power supply port Port3 and is made of power taking part and power pack.The first power taking mouth Port1 be connected power taking mouth Port2 and connect respectively a PES interface of PSE power supply unit, this power supply port Port3 connects the PD power receiving equipment.The main different brackets of controlling the input impedance of the first load P D1 and the second load P D2 by mid-span method and the power taking of end cross-over connection method of this power taking part, and after the input power of the first power taking mouth Port1 and the second power taking mouth Port2 is closed the road in the first load P D1 and the second load P D2 rear end, the input power pack.This power pack is provided with a PSE control chip, this PSE control chip can detect the required power consumption number of PD power receiving equipment that power supply port Port3 connects, and regulate respectively the input impedance of the first load P D1 and the second load P D2 according to this power consumption number, realizing regulating respectively the purpose of the required input power of the first power taking mouth Port1 and the second power taking mouth Port2, and then make the PSE power supply unit be respectively the first power taking mouth Port1 and the second power taking mouth Port2 improves required power.
Wherein, the first power taking mouth Port1 is the functional area, and the second power taking mouth Port2 is the auxiliary power supply mouth.Namely, this first power taking mouth Port1 is connected with the PSE interface by 8 complete lines, both can transmission of data signals with realization, and again can transmission of electric signals; And this second power taking mouth Port2 only utilizes 4 lines (4,5,7,8) transmission of electric signals.Be understandable that, in actual applications, the first power taking mouth Port1 and the second power taking mouth Port2 can support FE interface and GE interface, and just the port way to take power is different.
Wherein, utilize this transducer to realize that the PSE power supply unit for required power consumption number higher than the process of the PD supplying power for powered device of power that its port provides is:
(1) two PE interfaces are connected with the second power taking mouth Port2 with the first power taking mouth Port1 respectively, the PD power receiving equipment is connected with power supply port Port3;
(2) during initial condition, the first load P D1 and the second load P D2 are the input impedance grade of acquiescence: 0 grade;
(3) when the PSE control chip detects the required power consumption number of PD by power supply port Port3, according to determined power consumption number and according to certain power division ratio, regulate respectively the input impedance of the first load P D1 and the second load P D2, so that corresponding the first power taking mouth Port1 and the second required input power of power taking mouth Port2 corresponding to the second load P D2 of the first load P D1 is not more than the power that the PE interface provides, and the first power taking mouth Port1 and the second power taking mouth Port2 required input power summation are not less than the required power consumption number of PD equipment;
(4) after the PSE control chip detected the first load P D1 and the second load P D2 and all indicates power supply OK, the PSE control chip obtained the power that merges after processing, and opens the MOS switch, to the PD supplying power for powered device that is connected with power supply port Port3.
Further, when the PSE control chip detects power supply port Port3 connected PD power receiving equipment when abnormal, the MOS switch will be turned off initiatively, with protection PD power receiving equipment.After the PD power receiving equipment was normal, the PSE control chip reopened the MOS switch again to the PD supplying power for powered device.
Need explanation but, when the PSE control chip during not to power supply port Port3 connected PD supplying power for powered device, this transducer only needs the power consumption of microampere order, can work to guarantee the PSE control chip: the power supply port Port3 connected PD power receiving equipment that detects is carried out the power consumption classification get final product.
Be understandable that, this transducer can realize supporting two 802.3af interfaces to the power devices of a 802.3at standard; Simultaneously, by reequiping this transducer also to realize that two 802.3af interfaces are to the nonstandard interface power supply that more high-power demand is arranged.
Need to prove, the described transducer of this specific embodiment is only as a kind of example, should not consist of the restriction to the present invention program.
Accordingly, the present invention also provides a kind of Power over Ethernet system, comprising: power supply unit PSE and powered device PD; Also comprise: transducer:
Described transducer comprises:
At least two power taking mouths, at least one power supply port and,
For detection of the required power consumption number of described power supply port, and regulate the required input power of power taking mouth that is connected with PSE according to described power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output is thought the change-over circuit that described PD powers.
In Power over Ethernet provided by the present invention system, transducer is connected between PSE and PD; The required power consumption number of power supply port that in this transducer, the conversion electric circuit inspection is connected with PD, and regulate the required input power of power taking mouth that is connected with PSE according to this power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface is regulated successfully, the power that described power taking mouth is obtained merges, and export power after merging by power supply port, and then can realize that PSE powers for the PD of required power consumption number higher than power that its port provides.
Be understandable that, because a plurality of power taking mouths carry out the power taking action, and each power taking mouth obtains specific input power, be that PD powers in order to realize by a power supply port, after the required input power of the power taking mouth that is connected with the PSE interface is regulated successfully, need to merge processing to the power that each power taking mouth obtains.Therefore, the output of the corresponding load of power taking mouth that is connected with the PSE interface in this change-over circuit can close the Lu Houyu power supply port and be connected, and realizes the power that each power taking mouth obtains is merged with this.Certainly, the mode that the power that the power taking mouth is obtained merges is not limited to the mode that the embodiment of the present invention provides.
The above is only the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. method of supplying power to, it is characterized in that, be applicable in the Power over Ethernet system, described Power over Ethernet system comprises: power supply unit PSE, powered device PD and the transducer that is made of at least two power taking mouths, at least one power supply port and at least one change-over circuit; Described method comprises:
Described change-over circuit detects the required power consumption number of described power supply port, and regulates according to described power consumption number the required input power of power taking mouth that is connected with PSE;
After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output thinks that described PD powers.
2. method according to claim 1, is characterized in that, regulates the required input power of power taking mouth that is connected with PSE according to described power consumption number, is specially:
Described change-over circuit is regulated the input impedance of the power taking mouth that is connected with PSE, to regulate the described required input power of power taking mouth that is connected with PSE according to described power consumption number.
3. transducer is applicable in the Power over Ethernet system, and described Power over Ethernet system comprises: power supply unit PSE and powered device PD; It is characterized in that, described transducer comprises: at least two power taking mouths, at least one power supply port and,
For detection of the required power consumption number of described power supply port, and regulate the required input power of power taking mouth that is connected with PSE according to described power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output is thought the change-over circuit that described PD powers.
4. transducer according to claim 3, is characterized in that, the output of the corresponding load of power taking mouth that is connected with the PSE interface in described change-over circuit closes the Lu Houyu power supply port and is connected.
5. a Power over Ethernet system, comprising: power supply unit PSE and powered device PD; It is characterized in that, also comprise: transducer:
Described transducer comprises:
At least two power taking mouths, at least one power supply port and, for detection of the required power consumption number of described power supply port, and regulate the required input power of power taking mouth that is connected with PSE according to described power consumption number; After the required input power of the described power taking mouth that is connected with the PSE interface was regulated successfully, the power that described power taking mouth is obtained merged processing, and the power after merging by described power supply port output is thought the change-over circuit that described PD powers.
6. system according to claim 5, is characterized in that, the output of the corresponding load of power taking mouth that is connected with the PSE interface in described change-over circuit closes the Lu Houyu power supply port and is connected.
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| CN105357017A (en) * | 2015-11-16 | 2016-02-24 | 上海斐讯数据通信技术有限公司 | System and method for stabilizing POE (power over Ethernet) power supply voltage |
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| CN107135082A (en) * | 2017-04-28 | 2017-09-05 | 上海斐讯数据通信技术有限公司 | A kind of system and method powered jointly using two power supply end equipments |
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| WO2018035810A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳市大疆创新科技有限公司 | Card reader |
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