CN212935770U - Parallel current sharing functional circuit based on maximum current sharing method - Google Patents
Parallel current sharing functional circuit based on maximum current sharing method Download PDFInfo
- Publication number
- CN212935770U CN212935770U CN202021754503.5U CN202021754503U CN212935770U CN 212935770 U CN212935770 U CN 212935770U CN 202021754503 U CN202021754503 U CN 202021754503U CN 212935770 U CN212935770 U CN 212935770U
- Authority
- CN
- China
- Prior art keywords
- resistor
- current sharing
- diode
- magnetic core
- circuit based
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Power Conversion In General (AREA)
Abstract
The utility model discloses a parallel current-sharing functional circuit based on a maximum current-sharing method, relating to the field of high-voltage power supply converters; the magnetic core type magnetic core power supply comprises an operational amplifier U, a magnetic core inductance L, a diode D1, a diode D2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R5; the utility model discloses can distribute the electric current on average to each module, reduce the probability that the single-point became invalid, no matter the generating line that flow equalizes opens a way or the short circuit, all can not influence each power module autonomous working, and the interference killing feature of generating line is high.
Description
Technical Field
The utility model relates to a high voltage power supply converter especially relates to a parallelly connected function circuit that flow equalizes based on the method of flow equalizing the most greatly.
Background
In the use occasion of power larger than 120W, the power of a single rear film DC/DC converter module is difficult to meet the system requirement, and a plurality of modules are often required to be output in parallel for use, but the impedances in the modules are not necessarily completely consistent, so that the output currents distributed by the modules are different. Some modules output large current, and other modules output small current or even no current. The thermal stress of the module with large output current is increased, which may result in the reliability of the system being reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that impedance is different in the converter module and the problem that leads to the output current size difference that each module distributes in to the background art provides a parallelly connected function circuit that flow equalizes based on the maximum flow equalization method.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
a parallel current sharing function circuit based on a maximum current sharing method comprises an operational amplifier U, an inductor L with a magnetic core, a diode D1, a diode D2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R5;
wherein the content of the first and second substances,
the anode of diode D1 is connected to the M terminal of core inductor L,
the cathode of the diode D1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively,
the other end of the resistor R1 is respectively connected with the N end of the inductance L with the magnetic core and one end of the resistor R5,
the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the non-inverting input end of the operational amplifier U,
the other end of the resistor R3 is connected with VrefThe end is connected with the other end of the connecting rod,
the other end of the resistor R5 is respectively connected with the inverting input end of the operational amplifier U and one end of the resistor R4,
the other end of the resistor R4 is connected with the cathode of the diode D2 and the voltage VcomThe end is connected with the other end of the connecting rod,
the cathode of the diode D2 is connected to the output of the operational amplifier U.
As a further preferred aspect of the present invention, the operational amplifier is of a type CA3130, based on a maximum flow equalization method and a parallel flow equalization function circuit.
As a further preferred solution of the parallel current-sharing functional circuit based on the maximum current-sharing method of the present invention, the resistance of the resistor R1 is 5.5k Ω.
As a further preferred solution of the parallel current-sharing functional circuit based on the maximum current-sharing method, the resistance of the resistor R3 is 4k Ω.
As a further preferred solution of the parallel current-sharing functional circuit based on the maximum current-sharing method of the present invention, the resistance of the resistor R4 is 4.7k Ω.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect:
the utility model can distribute the current to each module evenly;
the utility model can reduce the single-point failure probability, and the independent work of each power module can not be influenced no matter the current-sharing bus is open or short-circuited;
the utility model has high anti-interference performance;
the utility model discloses a better redundancy can be realized to the method of flow equalizing the most greatly, can not influence entire system's operation because of the trouble of certain submodule piece.
Drawings
Fig. 1 is a circuit diagram of a parallel current-sharing functional circuit based on the maximum current-sharing method.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a parallel current sharing functional circuit based on the maximum current sharing method includes an operational amplifier U, an inductor L with a magnetic core, a diode D1, a diode D2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a resistor R5;
wherein the content of the first and second substances,
the anode of diode D1 is connected to the M terminal of core inductor L,
the cathode of the diode D1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively,
the other end of the resistor R1 is respectively connected with the N end of the inductance L with the magnetic core and one end of the resistor R5,
the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the non-inverting input end of the operational amplifier U,
the other end of the resistor R3 is connected with VrefEnd connectionThen, the first step is to connect the first step,
the other end of the resistor R5 is respectively connected with the inverting input end of the operational amplifier U and one end of the resistor R4,
the other end of the resistor R4 is connected with the cathode of the diode D2 and the voltage VcomThe end is connected with the other end of the connecting rod,
the cathode of the diode D2 is connected to the output of the operational amplifier U.
The model of the operational amplifier is CA 3130.
The resistance of the resistor R1 is 5.5k omega.
The resistance value of the resistor R3 is 4k omega.
The resistance of the resistor R4 is 4.7k omega.
As shown in fig. 1, the current sharing circuit is substantially an adder composed of operational amplifiers. Based on the virtual-off characteristics of the operational amplifier, equations (1) and (2) can be obtained:
and because the operational amplifier has the virtual short characteristic, V+＝V-Equation (3) is available:
when a plurality of modules are used in parallel, the current equalizing buses of all the modules are connected together, and the module V with the maximum output currentB_PeakBecomes larger, as shown in formula (3), VcomThe module is the master module. For the other modules at this time, VcomIncreasing, V of the operational amplifier in each sub-module-Greater than V+The operational amplifier outputs low level, the output voltage of the sub-module rises, and the output current becomes large, thereby achieving the purpose of current sharing.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;
and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A parallel current sharing function circuit based on a maximum current sharing method is characterized in that: the magnetic core type magnetic core power supply comprises an operational amplifier U, a magnetic core inductance L, a diode D1, a diode D2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R5;
wherein, the anode of the diode D1 is connected with the M end of the magnetic core inductance L,
the cathode of the diode D1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively,
the other end of the resistor R1 is respectively connected with the N end of the inductance L with the magnetic core and one end of the resistor R5,
the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the non-inverting input end of the operational amplifier U,
the other end of the resistor R3 is connected with VrefThe end is connected with the other end of the connecting rod,
the other end of the resistor R5 is respectively connected with the inverting input end of the operational amplifier U and one end of the resistor R4,
the other end of the resistor R4Respectively connected with the cathode of the diode D2 and VcomThe end is connected with the other end of the connecting rod,
the cathode of the diode D2 is connected to the output of the operational amplifier U.
2. The parallel current sharing functional circuit based on the maximum current sharing method according to claim 1, wherein: the model of the operational amplifier is CA 3130.
3. The parallel current sharing functional circuit based on the maximum current sharing method according to claim 1, wherein: the resistance of the resistor R1 is 5.5k omega.
4. The parallel current sharing functional circuit based on the maximum current sharing method according to claim 1, wherein: the resistance value of the resistor R3 is 4k omega.
5. The parallel current sharing functional circuit based on the maximum current sharing method according to claim 1, wherein: the resistance of the resistor R4 is 4.7k omega.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021754503.5U CN212935770U (en) | 2020-08-20 | 2020-08-20 | Parallel current sharing functional circuit based on maximum current sharing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021754503.5U CN212935770U (en) | 2020-08-20 | 2020-08-20 | Parallel current sharing functional circuit based on maximum current sharing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212935770U true CN212935770U (en) | 2021-04-09 |
Family
ID=75299773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021754503.5U Expired - Fee Related CN212935770U (en) | 2020-08-20 | 2020-08-20 | Parallel current sharing functional circuit based on maximum current sharing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212935770U (en) |
-
2020
- 2020-08-20 CN CN202021754503.5U patent/CN212935770U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206099366U (en) | Ambipolar photovoltaic power generation system | |
| CN110542786B (en) | Current sharing control method, device and equipment and computer readable storage medium | |
| CN110535333B (en) | Switch power supply output parallel current-sharing control circuit and switch power supply system | |
| CN108964418B (en) | Voltage sampling circuit and circuit system | |
| CN212935770U (en) | Parallel current sharing functional circuit based on maximum current sharing method | |
| CN212518763U (en) | Power supply current-sharing controller | |
| CN107332675B (en) | PoE equipment without network transformer | |
| US20230170793A1 (en) | Three-wire dc-dc converter and parallel power supply system | |
| CN108306353B (en) | Improved multi-module parallel digital current sharing system and method | |
| CN214412583U (en) | Power supply current equalizing circuit, power supply module, power supply system and computer equipment | |
| KR102307824B1 (en) | Power supply and its current equalization method | |
| CN209692608U (en) | A kind of high power VPX power supply with redundancy | |
| CN112105138A (en) | Electronic component parallel current-sharing circuit, design method and PCB | |
| CN107294733B (en) | Power over Ethernet isolation device | |
| CN112821741A (en) | Power supply current equalizing circuit, power supply module, power supply system and computer equipment | |
| CN211180687U (en) | Current-sharing power supply | |
| CN218664854U (en) | A step-down return circuit for elevator overhauls device | |
| CN111786554B (en) | Boost power conversion device | |
| CN216016697U (en) | Power supply current equalizing circuit and power supply module | |
| CN210405267U (en) | Level conversion system | |
| CN217689822U (en) | One-way differential drive circuit | |
| CN220586169U (en) | Busbar capacitance voltage equalizing circuit of photovoltaic inverter | |
| CN218633702U (en) | EMC radiation reduction circuit | |
| CN106787833B (en) | Power supply circuit with DC/DC conversion module | |
| CN217934390U (en) | Quick plugging structure of large-current power supply module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210409 Termination date: 20210820 |