CN202094631U - Plug-in type multichannel current equalizing interface circuit - Google Patents
Plug-in type multichannel current equalizing interface circuit Download PDFInfo
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- CN202094631U CN202094631U CN2011202097785U CN201120209778U CN202094631U CN 202094631 U CN202094631 U CN 202094631U CN 2011202097785 U CN2011202097785 U CN 2011202097785U CN 201120209778 U CN201120209778 U CN 201120209778U CN 202094631 U CN202094631 U CN 202094631U
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Abstract
A plug-in type multichannel current equalizing interface circuit comprises a main loop composed of a plurality of parallelly connected main loop channels, wherein each main loop channel is connected with a current equalizing control circuit for controlling work state of the main loop channel, the main loop channel comprises an input capacitor, the input capacitor is parallelly connected with an output voltage of a parallelly connected dc power supply module, a drain electrode of an N-MOS tube is simultaneously connected with a positive end of the output voltage of the parallelly connected dc power supply module and one end of a parallelly-connected branch of an auxiliary capacitor and an auxiliary resistor, the other end of the parallelly-connected branch of the auxiliary capacitor and the auxiliary resistor is connected with an anode of an auxiliary diode, a cathode of the auxiliary diode is simultaneously connected with one end of a source electrode of the N-MOS tube and one end of an inductor, the other end of the inductor is simultaneously connected with one end of an output capacitor and a positive end of the output voltage, the other end of the output capacitor is simultaneously connected with a negative end of the output voltage of the parallelly connected dc power supply module and a negative end of the output voltage, and two ends of the output voltage are parallelly connected with load resistors.
Description
Technical field
The utility model relates to the equal stream interface circuit of a kind of plug-in type multichannel.
Background technology
The parallel connection direct power-supply system is made up of a plurality of DC power supplier, and because of its stability, reliability height, advantage such as capacity extension is convenient, flexible, and use occasion is unrestricted has been widely used in fields such as communication, computer, electric power at present.Even but DC power supplier specification of the same race also can cause the inconsistent of output characteristic to each other because of components and parts tolerance and reason such as aging.This inconsistency can cause the unbalanced phenomena of parallel connection direct power-supply system, and promptly the higher DC power supplier of output voltage can be born bigger output current, and the DC power supplier that output voltage is lower is then born less output current.Under the serious situation, this unbalanced phenomena will injure the safe operation of whole parallel connection direct power-supply system.Therefore, the equal flow problem between each DC power supplier needs most solution in the parallel connection direct power-supply system.Thus, flow equalize technology arises at the historic moment.The plug-in type flow equalize technology is exactly wherein a kind of, promptly between parallel connection direct power module and load, insert equal stream interface circuit, solve current balance problem between different DC power supplier by this equal stream interface circuit, benefit is to reduce the coherence request of whole system to the parallel connection direct power module, realizes low cost and high flexibility.
Shown in Figure 1 is the equal stream interface circuit of existing a kind of plug-in type multichannel.It is made up of power major loop and control loop 2 parts.Major loop structure is very simple, is made up of n identical passage, and each passage is again mainly by input capacitance Cij, and N-MOS pipe Sj and inductance L j form (j=1...n, down together).Ij is in parallel with Cij for parallel connection direct power module output voltage V, the source electrode of Sj links to each other with the anode of Vij, the drain electrode of Sj links to each other with the end of Lj, the other end of Lj links to each other with the end of output capacitance Co and the anode of output voltage V o simultaneously, the other end of Co links to each other with the negative terminal of Vij and the negative terminal of Vo simultaneously, and load resistance R1 is parallel to the Vo two ends.Control loop is made up of n identical equalizing control circuit, links to each other with the major loop passage of correspondence respectively.Equalizing control circuit j has 6 external-connected ports, 5 port Vij wherein, vsj, vgj, vsenj, with Gndj respectively with the Vij anode of major loop passage j, the Sj source electrode, Sj gate pole, inductive current detection port vsenj, link to each other with the Vij negative terminal, 1 port vcsbusj then is connected on the sharing control bus vcsbus in addition.Equalizing control circuit j obtains equal stream information vcsbus by the sharing control bus, inductive current information vsenj according to equal stream information vcsbus and major loop passage j, adopt specific equal flow algorithm, output mos pipe differential driving signal vgj and vsj, the operating state of metal-oxide-semiconductor Sj in the control major loop passage (or conducting or by), the current i Lj of inductance L j is flow through in adjusting, thereby realizes the equilibrium of each parallel connection direct power module output current.But because the influence of metal-oxide-semiconductor Sj body diode conduction voltage drop in the major loop make the admissible inconsistency of parallel connection direct power module output voltage be restricted, so the equal stream interface circuit of this plug-in type multichannel is suitable for the parallel connection direct power-supply system of low pressure.
Summary of the invention
The utility model will solve the problem of the suitable parallel connection direct power-supply system electric pressure narrow range of the existing equal stream interface circuit of plug-in type multichannel, and a kind of equal stream interface circuit of plug-in type multichannel that is applicable to the parallel connection direct power-supply system of high pressure is provided.
The technical solution of the utility model:
The equal stream interface circuit of a kind of plug-in type multichannel, comprise major loop, described major loop is composed in parallel by a plurality of major loop passages, all be connected with the equalizing control circuit of its operating state of control on each described major loop passage, it is characterized in that: described major loop passage comprises input capacitance, the N-MOS pipe, auxiliary capacitor, auxiliary resistance, booster diode, inductance, output capacitance, described input capacitance is in parallel with parallel connection direct power module output voltage, the drain electrode while of described N-MOS pipe and the anode of parallel connection direct power module output voltage, one end of auxiliary capacitor and auxiliary resistance parallel branch links to each other, the other end of described auxiliary capacitor and auxiliary resistance parallel branch is connected with the anode of booster diode, the negative electrode while of described booster diode and the source electrode of described N-MOS pipe, one end of inductance links to each other, the other end while of described inductance and an end of output capacitance, the anode of output voltage links to each other, the other end while of described output capacitance and the negative terminal of parallel connection direct power module output voltage, the negative terminal of output voltage links to each other; The two ends of described output voltage are parallel with load resistance;
The gate pole of the parallel connection direct power module output voltage anode of described major loop passage, the source electrode of N-MOS pipe, N-MOS pipe, the detection port of inductive current, parallel connection direct power module output voltage negative terminal link to each other with corresponding external-connected port on the equalizing control circuit respectively, and described equalizing control circuit also is provided with an external-connected port that is connected with the sharing control bus.
Further, described equalizing control circuit comprises accessory power supply, current detection circuit, current control circuit, current programming circuit, metal-oxide-semiconductor drive circuit,
The various DC power supply voltages and the reference voltage that provide the work of equalizing control circuit remainder required is provided described accessory power supply, can boost or the conversion process of step-down to parallel connection direct power module output voltage according to actual needs;
Described current detection circuit is used to receive the inductive current information of the major loop passage that has converted voltage signal to and does suitably to handle, and again the current detecting result is flowed to current programming circuit and current control circuit;
Described current programming circuit is used for obtaining equal stream information by equal flow algorithm from the sharing control bus and produces the required reference voltage of current control circuit and this reference voltage is sent to current control circuit;
Current detecting result and reference voltage that described current control circuit is used for receiving compare, and provide the driving command that metal-oxide-semiconductor opens or closes, and this driving command is sent to the metal-oxide-semiconductor drive circuit;
Described metal-oxide-semiconductor drive circuit is used to carry out the metal-oxide-semiconductor driving command of current control circuit, the operating state of control metal-oxide-semiconductor.
Technical conceive of the present utility model is: for eliminating the body diode influence of N-MOS pipe in the major loop passage, adopt auxiliary capacitor, the connection in series-parallel branch road of auxiliary resistance and booster diode is managed drain-source structure extremely in parallel with N-MOS and is replaced original single metal-oxide-semiconductor, and adjust the connection of the N-MOS pipe drain-source utmost point and parallel connection direct power module output voltage and inductance, the drain electrode that is the N-MOS pipe links to each other with the anode of parallel connection direct power module output voltage and an end of auxiliary capacitor and auxiliary resistance parallel branch simultaneously, the other end of auxiliary capacitor and auxiliary resistance parallel branch links to each other with the anode of booster diode, and the negative electrode of booster diode links to each other with the source electrode of N-MOS pipe and an end of inductance simultaneously.Under the cooperation control of a plurality of equalizing control circuits, the major loop of the equal stream interface circuit of plug-in type multichannel can help the inconsistent parallel connection direct power module of a plurality of output characteristic to realize the output current equilibrium.
What need special instruction is, metal-oxide-semiconductor in the equal stream interface circuit of this plug-in type multichannel is except can being that the N-MOS pipe can also be a P-MOS pipe, the position of metal-oxide-semiconductor high-endly can also be positioned at low side except being positioned at, and the parallel branch of auxiliary capacitor and auxiliary resistance and the position of booster diode are interchangeable.
The beneficial effects of the utility model mainly show: the scope of application of having widened the equal stream interface circuit of plug-in type multichannel, the parallel connection direct power-supply system that not only is fit to low pressure, but also be fit to the parallel connection direct power-supply system of high pressure, can provide current-sharing scheme low-cost, high flexibility for the inconsistent parallel connection direct power module of a plurality of output characteristic or solar battery group in parallel or multiple-connected battery group etc.
Description of drawings
Fig. 1 is the equal stream interface circuit figure of existing a kind of plug-in type multichannel.
Fig. 2 is a circuit diagram of the present utility model.
Fig. 3 is a kind of equalizing control circuit internal structure block diagram of the present utility model.
Fig. 4 is the major loop passage of a kind of specific embodiment of the present utility model and the circuit diagram of equalizing control circuit.
Fig. 5 is when Vi1＜Vik (k=2...n), the ideal operation oscillogram of a kind of specific embodiment of the present utility model.
Embodiment
With reference to Fig. 2, Fig. 3, the equal stream interface circuit of a kind of plug-in type multichannel, comprise major loop, described major loop is composed in parallel by a plurality of major loop passages, all be connected with the equalizing control circuit of its operating state of control on each described major loop passage, described major loop passage comprises input capacitance Cij, N-MOS manages Sj, auxiliary capacitor Caj, auxiliary resistance Raj, booster diode Daj, inductance L j, output capacitance Co (j=1...n, down together), described input capacitance Cij is in parallel with parallel connection direct power module output voltage V ij, the drain electrode while of described N-MOS pipe Sj and the anode of parallel connection direct power module output voltage V ij, auxiliary capacitor Caj links to each other with an end of auxiliary resistance Raj parallel branch, the other end of described auxiliary capacitor Caj and auxiliary resistance Raj parallel branch is connected with the anode of booster diode Daj, the negative electrode of described booster diode Daj is managed the source electrode of Sj simultaneously with described N-MOS, the end of inductance L j links to each other, the other end while of described inductance L j and the end of output capacitance Co, the anode of output voltage V o links to each other, the other end while of described output capacitance Co and the negative terminal of parallel connection direct power module output voltage V ij, the negative terminal of output voltage V o links to each other; The two ends of described output voltage V o are parallel with load resistance R1;
The gate pole of the source electrode of the parallel connection direct power module output voltage V ij anode of described major loop passage, N-MOS pipe Sj, N-MOS pipe Sj, the detection port of inductance L j current i Lj, parallel connection direct power module output voltage V ij negative terminal link to each other with corresponding external-connected port on the equalizing control circuit respectively, and described equalizing control circuit also is provided with an external-connected port vcsbusj who is connected with sharing control bus vcsbus.
Described equalizing control circuit comprises accessory power supply, current detection circuit, current control circuit, current programming circuit, metal-oxide-semiconductor drive circuit,
Described accessory power supply is used to provide the required various DC power supply voltages and the reference voltage of remainder work of equalizing control circuit, can boost or the conversion process of step-down to parallel connection direct power module output voltage V ij according to actual needs;
Described current detection circuit is used to receive the inductance L j current i Lj information of the major loop passage that has converted voltage signal to and does suitably to handle, and again current i Lj testing result is flowed to current programming circuit and current control circuit;
Described current programming circuit is used for obtaining equal stream information by equal flow algorithm from sharing control bus vcsbus and produces the required reference voltage of current control circuit and this reference voltage is sent to current control circuit;
Current i Lj testing result and reference voltage that described current control circuit is used for receiving compare, and provide the driving command that metal-oxide-semiconductor opens or closes, and this driving command is sent to the metal-oxide-semiconductor drive circuit;
Described metal-oxide-semiconductor drive circuit is used to carry out the metal-oxide-semiconductor driving command of current control circuit, the operating state of control metal-oxide-semiconductor Sj.
Fig. 4 has shown the part (j=1...n, down together) of the major loop passage j and the equalizing control circuit j of a kind of specific embodiment of the present utility model.Major loop passage j adopts series resistance Rsenj to detect inductive current iLj, obtains voltage vsenj.Among the major loop passage j shown in Figure 4, ij is in parallel with input capacitance Cij for parallel connection direct power module output voltage V, the drain electrode of N-MOS pipe Sj links to each other with the anode of Vij and an end of auxiliary capacitor Caj and auxiliary resistance Raj parallel branch simultaneously, the other end of Caj and Raj parallel branch links to each other with the anode of Daj, the negative electrode of Daj links to each other with the source electrode of Sj and the end of inductance L j simultaneously, the other end of Lj links to each other with the end of output capacitance Co and the anode of output voltage V o simultaneously, the other end of Co links to each other with the negative terminal of Vo and the end of detection resistance R senj simultaneously, the other end of Rsenj links to each other with the negative terminal of Vij, and load resistance R1 is parallel to the Vo two ends.Draw 5 external-connected port Vij (being the Vij anode), vgj (being the Sj gate pole), vsj (being the Sj source electrode), vsenj (being the detection port of inductive current iLj), Gndj (being the Vij negative terminal) among the major loop passage j, 5 external-connected ports of the same name with equalizing control circuit j mate one by one respectively.Equalizing control circuit j shown in Figure 4 is made up of accessory power supply j, current detection circuit j, current programming circuit j, current control circuit j, these 5 parts of metal-oxide-semiconductor drive circuit j.Accessory power supply j converts parallel connection direct power module output voltage V ij to Vccj and the Vddj power supply needs with the remainder that satisfies equalizing control circuit j, Vccj gives current detection circuit j, current programming circuit j, current control circuit j power supply, Vddj gives metal-oxide-semiconductor drive circuit j power supply, and reference voltage V ref1j that generation current programming circuit j is required and Vref2j (Vref1j＞Vcref2j).Current detection circuit j is made up of operational amplifier U1j, resistance R c1j and Rc2j, capacitor C c1j.The vsenj interface of major loop passage j links to each other with the normal phase input end of U1j, the end of Rc1j links to each other with the output of U1j, the other end while of Rc1j links to each other with an end of inverting input, Rc2j and the Cc1j parallel branch of U1j, the other end of Rc2j and Cc1j parallel branch links to each other with the Gndj interface of major loop passage j, U1j output voltage vcsenj.Current programming circuit j adopts minimum master slave mode to produce required reference voltage vcsref1j and the vcsref2j of current control circuit j, by operational amplifier U2j, U3j, U4j, diode Dcsenj, resistance R csenj, Rcs1j, Rcs2j, Rcs3j, Rcs4j, Rcs5j, Rcs6j, Rcs7j, Rcs8j, capacitor C cs1j, Ccs2j form.The normal phase input end of U2j is that the external-connected port vcsbusj (being connected on the sharing control bus vcsbus) of equalizing controller j links to each other with the anode of Dcsenj, an end and the sharing control bus interface vcsbusj of Rcsenj simultaneously, the negative electrode of Dcsenj links to each other with current detection circuit j output vcsenj, and the other end of Rcsenj links to each other with accessory power supply j output Vccj.The negative-phase input of U2j links to each other with the output of U2j, the end of Rcs1j and the end of Rcs5j simultaneously.The other end of Rcs1j links to each other with the normal phase input end of U3j and the end of Rcs2j simultaneously, and the other end of Rcs2j links to each other with accessory power supply j output Vref1j.The end of Rcs4j links to each other with the output vcsref1j of U3j, the other end of Rcs4j links to each other with the negative-phase input of U3j and an end of Ccs1j and Rcs3j parallel branch simultaneously, and the other end of Ccs1j and Rcs3j parallel branch links to each other with the external-connected port Gndj of major loop passage j.The other end of Rcs5j links to each other with the normal phase input end of U4j and the end of Rcs6j simultaneously, and the other end of Rcs6j links to each other with accessory power supply j output Vref2j.The end of Rcs8j links to each other with the output vcsref2j of U4j, the other end of Rcs8j links to each other with the negative-phase input of U4j and an end of Ccs2j and Rcs7j parallel branch simultaneously, and the other end of Ccs2j and Rcs7j parallel branch links to each other with the external-connected port Gndj of major loop path j.Current control circuit j adopts the chain rate that stagnates than control method, is made up of comparator U5j and U6j, rest-set flip-flop U7j.The output vcsenj of current detection circuit j is connected to the normal phase input end of U5j and the inverting input of U6j simultaneously, be connected to the inverting input of U5j by the reference voltage vcsref1j of current programming circuit j output, reference voltage vcsref2j is connected to the normal phase input end of U6j.The output of U5j is connected to the zero clearing input R (high level is effective) of U7j, and the output of U6j is connected to the set input S (high level is effective) of U7j.Control the switch command vgsj of metal-oxide-semiconductor Sj by the positive output end Q output of U7j.Metal-oxide-semiconductor drive circuit j is one and satisfies the level shifting circuit that Sj drives requirement, the output vgsj of U7j is through the level conversion of level shifting circuit j, export the 1 pair of logical relation differential driving signal consistent with vgsj respectively with major loop passage j in vgj link to each other with the vsj contact.
The operation principle of circuit shown in Figure 4 is roughly as follows:
Suppose to have n parallel connection direct power module, its output voltage is respectively Vi1 to Vin, wherein with the Vi1 minimum, i.e. and Vi1＜Vik (k=2...n, down with).Under minimum master slave mode and hysteresis current control, major loop passage 1 will be as holotype, and promptly N-MOS manages S1 with conducting always, output voltage V o ≈ Vi1.And major loop passage k will be as from pattern, and promptly N-MOS pipe Sk turn-on and turn-off are periodically regulated iLk and kept basically identical with iL1, the realization current-sharing.Detailed process is as follows: because the Vi1 minimum causes iL1 minimum in load current distributes, corresponding vcsen1 is also minimum, so the voltage vcsbus ≈ vcsen1 (being minimum master slave mode) on the sharing control bus.Parameters such as RcsljRcs2j, the Rcs3j among the appropriate design equalizing control circuit j, Rcs4j, Rcs5j, Rcs6j, Rcs7j, Rcs8j, can make reference voltage vcsref1j=vcsbus+Vreflj, vcsref2j=vcsbus+Vref2j, wherein Vreflj＞Vref2j (j=1...n).Because vcsen1＜vcsref21, vgs1 will be a high level always, make the S1 conducting always in the major loop passage 1.For major loop passage k, when vcsenk＞vcsref1k, equalizing control circuit k drives Sk to be ended, Vik, Cak, Rak, Dak, Lk, Co, R1 and Rsenk form the loop among the major loop passage k, the Cak charging, inductance L k both end voltage vLk ≈ Vik-vcak-Vi1＜0 (vcaj is an auxiliary capacitor Cak both end voltage), Lk discharge, iLk reduces, and vcsenk reduces thereupon.When vcsenk＜vcsref2k, equalizing control circuit k drives the Sk conducting, Vik, Sk, Lk, Co, R1 and Rsenk form the loop among the major loop passage k, and Cak and Rak form another loop, and Cak discharges by Rak, inductance L k both end voltage vLk ≈ Vik-Vi1＞0, the Lk charging, iLk increases, and vcsenk increases until vcsenk＞vcsref1k thereupon, Sk will be cut off once more, and major loop passage k enters next cycle period.Adopt method for controlling hysteresis loop current, the variation of iLk is limited in the interval, keeps basically identical with iL1 all the time.When Cak is enough big, can be similar to and think that vcak is constant.The effect of Rak is to absorb excess energy, makes Cak both end voltage vcak maintain certain level.Each main ideal operation waveform of foregoing circuit as shown in Figure 5.
The described content of this specification embodiment only is enumerating the way of realization of utility model design; protection range of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection range of the present utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (2)
1. equal stream interface circuit of plug-in type multichannel, comprise major loop, described major loop is composed in parallel by a plurality of major loop passages, all be connected with the equalizing control circuit of its operating state of control on each described major loop passage, it is characterized in that: described major loop passage comprises input capacitance, the N-MOS pipe, auxiliary capacitor, auxiliary resistance, booster diode, inductance, output capacitance, described input capacitance is in parallel with parallel connection direct power module output voltage, the drain electrode while of described N-MOS pipe and the anode of parallel connection direct power module output voltage, one end of auxiliary capacitor and auxiliary resistance parallel branch links to each other, the other end of described auxiliary capacitor and auxiliary resistance parallel branch is connected with the anode of booster diode, the negative electrode while of described booster diode and the source electrode of described N-MOS pipe, one end of inductance links to each other, the other end while of described inductance and an end of output capacitance, the anode of output voltage links to each other, the other end while of described output capacitance and the negative terminal of parallel connection direct power module output voltage, the negative terminal of output voltage links to each other; The two ends of described output voltage are parallel with load resistance;
The gate pole of the parallel connection direct power module output voltage anode of described major loop passage, the source electrode of N-MOS pipe, N-MOS pipe, the detection port of inductive current, parallel connection direct power module output voltage negative terminal link to each other with corresponding external-connected port on the equalizing control circuit respectively, and described equalizing control circuit also is provided with an external-connected port that is connected with the sharing control bus.
2. the equal stream interface circuit of a kind of plug-in type multichannel according to claim 1, it is characterized in that: described equalizing control circuit comprises accessory power supply, current detection circuit, current control circuit, current programming circuit, metal-oxide-semiconductor drive circuit,
The various DC power supply voltages and the reference voltage that provide the work of equalizing control circuit remainder required is provided described accessory power supply, can boost or the conversion process of step-down to parallel connection direct power module output voltage according to actual needs;
Described current detection circuit is used to receive the inductive current information of the major loop passage that has converted voltage signal to and does suitably to handle, and again the current detecting result is flowed to current programming circuit and current control circuit;
Described current programming circuit is used for obtaining equal stream information by equal flow algorithm from the sharing control bus and produces the required reference voltage of current control circuit and this reference voltage is sent to current control circuit;
Current detecting result and reference voltage that described current control circuit is used for receiving compare, and provide the driving command that metal-oxide-semiconductor opens or closes, and this driving command is sent to the metal-oxide-semiconductor drive circuit;
Described metal-oxide-semiconductor drive circuit is used to carry out the metal-oxide-semiconductor driving command of current control circuit, the operating state of control metal-oxide-semiconductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202097785U CN202094631U (en) | 2011-06-20 | 2011-06-20 | Plug-in type multichannel current equalizing interface circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202097785U CN202094631U (en) | 2011-06-20 | 2011-06-20 | Plug-in type multichannel current equalizing interface circuit |
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| CN202094631U true CN202094631U (en) | 2011-12-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222905A (en) * | 2011-06-20 | 2011-10-19 | 浙江工业大学 | Plug-in multi-passage current sharing interface circuit |
| CN103138574A (en) * | 2013-03-20 | 2013-06-05 | 成都芯源系统有限公司 | Current equalizing system |
| CN103199694A (en) * | 2013-03-27 | 2013-07-10 | 北京工业大学 | Switching power supply with automatic current sharing function |
| CN104506037A (en) * | 2015-01-21 | 2015-04-08 | 哈尔滨工程大学 | Parallel outer ring flow equalizing control method for DC/DC convertor |
| TWI505591B (en) * | 2012-12-10 | 2015-10-21 | Sansha Electric Mfg Co Ltd | Parallel operation of the power supply unit |
-
2011
- 2011-06-20 CN CN2011202097785U patent/CN202094631U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222905A (en) * | 2011-06-20 | 2011-10-19 | 浙江工业大学 | Plug-in multi-passage current sharing interface circuit |
| CN102222905B (en) * | 2011-06-20 | 2013-11-13 | 浙江工业大学 | Plug-in multi-passage current sharing interface circuit |
| TWI505591B (en) * | 2012-12-10 | 2015-10-21 | Sansha Electric Mfg Co Ltd | Parallel operation of the power supply unit |
| CN103138574A (en) * | 2013-03-20 | 2013-06-05 | 成都芯源系统有限公司 | Current equalizing system |
| CN103138574B (en) * | 2013-03-20 | 2015-04-01 | 成都芯源系统有限公司 | Current equalizing system |
| CN103199694A (en) * | 2013-03-27 | 2013-07-10 | 北京工业大学 | Switching power supply with automatic current sharing function |
| CN104506037A (en) * | 2015-01-21 | 2015-04-08 | 哈尔滨工程大学 | Parallel outer ring flow equalizing control method for DC/DC convertor |
| CN104506037B (en) * | 2015-01-21 | 2017-11-21 | 哈尔滨工程大学 | A kind of DC/DC converters parallel connection outer shroud current-sharing control method |
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