CN204244079U - Modular power source primary side parallel current-equalizing circuit - Google Patents
Modular power source primary side parallel current-equalizing circuit Download PDFInfo
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- CN204244079U CN204244079U CN201420519424.4U CN201420519424U CN204244079U CN 204244079 U CN204244079 U CN 204244079U CN 201420519424 U CN201420519424 U CN 201420519424U CN 204244079 U CN204244079 U CN 204244079U
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Abstract
The utility model discloses a kind of modular power source primary side parallel current-equalizing circuit, comprise output rectification filter module, PWM control module, current sharing control module, optical coupler module, negative feedback module and multiple power module; Described output rectification filter module is electrically connected multiple power module; Described power module is connected by current sharing signal terminals; Described output rectification filter module is connected to input by transformer; Described primary earth terminal to be connected a sample resistance; Described PWM control module and current sharing control module electrical connection; And connect respectively between sample resistance and primary; Described PWM control module and current sharing control module input are electrically connected with the first optical coupler and the second optical coupler.Modular power source primary side parallel current-equalizing circuit of the present utility model, controls secondary side voltage by primary side, and then controls secondary side current, and other current module output currents of dynamic conditioning parallel system, reach current-sharing optimum efficiency simultaneously.
Description
Technical field
The utility model is specifically related to a kind of modular power source primary side parallel current-equalizing circuit.
Background technology
High power system adopts multiple stage switch power parallel to run and realizes, and is one of developing direction of current power technology; The modular power of parallel running can have lot of advantages, one is that low power power module can be combined into powerful power-supply system easily, and its capacity can arbitrary extension; Two is the Redundancy Design realizing power-supply system, improves its reliability; Three is that use occasion is unrestricted, combines as required, convenient, flexible.In principle, the high power system that multiple stage power sources in parallel is formed, should as separate unit power supply, under input bus and output loading situation, except the output voltage of system remain stable except, can also long-term, trouble-free reliability service.This electricity just requiring in system each power supply to bear, thermal stress are substantially suitable; That is, certain corresponding measure must be taked, ensure the difference of system not reason each power supply carrying situation, cause electric heating uneven and the vicious circle that causes, influential system characteristic and reliability service; Flow equalize technology is controlled the output current of parallel connection power supply each in system, and as far as possible all subsystem input total current, guarantees a kind of special measure of multiple stage power supply reliability service; Existing modular power source primary side parallel current-equalizing circuit current-sharing poor effect, reason is the control of secondary side current difficulty, is difficult to cooperation control in addition between multiple parallel electric source module.
Utility model content
(1) technical problem that will solve
For solving the problem, the utility model proposes a kind of modular power source primary side parallel current-equalizing circuit; Be intended to solve the problems such as current-sharing poor effect.
(2) technical scheme
Modular power source primary side parallel current-equalizing circuit of the present utility model, comprises output rectification filter module, PWM control module, current sharing control module, optical coupler module, negative feedback module and multiple power module; Described output rectification filter module is electrically connected multiple power module; Described power module is connected by current sharing signal terminals; Described output rectification filter module is connected to input by transformer; Described primary earth terminal to be connected a sample resistance; Described PWM control module and current sharing control module electrical connection; And connect respectively between sample resistance and primary; Described PWM control module and current sharing control module input are electrically connected with the first optical coupler and the second optical coupler; Described first optical coupler and the second optical coupler are connected to negative feedback module; Described negative feedback module is electrically connected to output rectification filter module; Described current sharing signal terminals is electrically connected to current sharing control module.
Further, described PWM control module side is also electrically connected with a field effect transistor; Source electrode and the drain electrode of described field effect transistor are connected between primary and sample resistance.
Further, described current sharing control module is by first order Current amplifier module and second level Current amplifier module composition; Described first order Current amplifier model calling sample resistance; Described second level Current amplifier model calling current sharing signal terminals; Described second level Current amplifier module output is connected to the first optical coupler.
Further, described one-level Current amplifier module input is serially connected with an inductance.
Further, described negative feedback module is that controllable accurate source of stable pressure and peripheral circuit thereof are formed by TL431.
(3) beneficial effect
The utility model compared with prior art, it has following beneficial effect: modular power source primary side parallel current-equalizing circuit of the present utility model, secondary side voltage is controlled by primary side, and then control secondary side current, other current module output currents of dynamic conditioning parallel system simultaneously, and not only adjust separately single power supply module, reach current-sharing optimum efficiency.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a application's part, does not form improper restriction of the present utility model, in the accompanying drawings:
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is current sharing control module of the present utility model, optical coupler module and negative feedback module circuit theory diagrams.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to restriction of the present utility model.
Modular power source primary side parallel current-equalizing circuit as depicted in figs. 1 and 2, comprises output rectification filter module, PWM control module, current sharing control module, optical coupler module, negative feedback module and multiple power module; Described output rectification filter module is electrically connected multiple power module; Described power module is connected by current sharing signal terminals; Described output rectification filter module is connected to input by transformer T1; The elementary earth terminal of described transformer T1 is connected a sample resistance RS; Described PWM control module and current sharing control module electrical connection; And respectively connect sample resistance RS and transformer T1 elementary between; Described PWM control module and current sharing control module input are electrically connected with the first optical coupler IC2 and the second optical coupler IC3; Described first optical coupler IC2 and the second optical coupler IC3 is connected to negative feedback module; Described negative feedback module is electrically connected to output rectification filter module; Described current sharing signal terminals is electrically connected to current sharing control module.
Wherein, described PWM control module side is also electrically connected with a field effect transistor Q1; The source electrode of described field effect transistor Q1 and drain electrode are connected between the elementary and sample resistance RS of transformer T1.Described current sharing control module is made up of first order Current amplifier module I C1A and second level Current amplifier module I C1B; Described first order Current amplifier module I C1A connects sample resistance RS; Described second level Current amplifier module I C1B connects current sharing signal terminals; Described second level Current amplifier module I C1B output is connected to the first optical coupler IC2.Described one-level Current amplifier module I C1A input is serially connected with an inductance L 1.Described negative feedback module is that controllable accurate source of stable pressure TL431 and peripheral circuit thereof are formed by TL431.
During work, because multiple power module is connected by current-sharing signal, association exports, and increases power output, when at a time power output increases the electric current of power module 1, its input current and primary side current also increase, the current signal IS that primary side sampling resistor RS samples also corresponding increase, IS amplifies through IC1A, then changes the negative feedback of power module 1 through IC1B and IC2, power module 1 output voltage is reduced, to reduce the power output of power module 1.Meanwhile, after power module current IS increases, system current-sharing signal also can correspondingly increase, and by the corresponding increase of the output voltage of other power modules in system, balances with power module 1 output voltage, the dynamic equilibrium of control system output voltage, reaches power module current-sharing and exports
Embodiment recited above is only be described preferred implementation of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection range of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (5)
1. a modular power source primary side parallel current-equalizing circuit, is characterized in that: comprise output rectification filter module, PWM control module, current sharing control module, optical coupler module, negative feedback module and multiple power module; Described output rectification filter module is electrically connected multiple power module; Described power module is connected by current sharing signal terminals; Described output rectification filter module is connected to input by transformer; Described transformer comprises elementary earth terminal, a sample resistance that the elementary earth terminal of described transformer is connected; Described PWM control module and current sharing control module electrical connection; And connect respectively between sample resistance and primary; Described PWM control module and current sharing control module input are electrically connected with the first optical coupler and the second optical coupler; Described first optical coupler and the second optical coupler are connected to negative feedback module; Described negative feedback module is electrically connected to output rectification filter module; Described current sharing signal terminals is electrically connected to current sharing control module.
2. modular power source primary side parallel current-equalizing circuit according to claim 1, is characterized in that: described PWM control module side is also electrically connected with a field effect transistor; Source electrode and the drain electrode of described field effect transistor are connected between primary and sample resistance.
3. modular power source primary side parallel current-equalizing circuit according to claim 1, is characterized in that: described current sharing control module is by first order Current amplifier module and second level Current amplifier module composition; Described first order Current amplifier model calling sample resistance; Described second level Current amplifier model calling current sharing signal terminals; Described second level Current amplifier module output is connected to the first optical coupler.
4. modular power source primary side parallel current-equalizing circuit according to claim 3, is characterized in that: described one-level Current amplifier module input is serially connected with an inductance.
5. modular power source primary side parallel current-equalizing circuit according to claim 1, is characterized in that: described negative feedback module is made up of TL431 controllable accurate source of stable pressure and peripheral circuit thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420519424.4U CN204244079U (en) | 2014-09-10 | 2014-09-10 | Modular power source primary side parallel current-equalizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420519424.4U CN204244079U (en) | 2014-09-10 | 2014-09-10 | Modular power source primary side parallel current-equalizing circuit |
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| Publication Number | Publication Date |
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| CN204244079U true CN204244079U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420519424.4U Expired - Fee Related CN204244079U (en) | 2014-09-10 | 2014-09-10 | Modular power source primary side parallel current-equalizing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245109A (en) * | 2015-11-05 | 2016-01-13 | 许继电气股份有限公司 | Clamp double submodule energy acquiring power supply device and energy acquiring control method |
| CN106787629A (en) * | 2017-02-15 | 2017-05-31 | 天水七四九电子有限公司 | A kind of circuit and method suitable for high power switching power supply parallel current-sharing |
| CN110045776A (en) * | 2019-04-29 | 2019-07-23 | 湖北三江航天万峰科技发展有限公司 | A kind of autonomous controllable type automatic flow equalization device of modular power source |
-
2014
- 2014-09-10 CN CN201420519424.4U patent/CN204244079U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245109A (en) * | 2015-11-05 | 2016-01-13 | 许继电气股份有限公司 | Clamp double submodule energy acquiring power supply device and energy acquiring control method |
| CN106787629A (en) * | 2017-02-15 | 2017-05-31 | 天水七四九电子有限公司 | A kind of circuit and method suitable for high power switching power supply parallel current-sharing |
| CN106787629B (en) * | 2017-02-15 | 2019-09-20 | 天水七四九电子有限公司 | A kind of route and method suitable for high power switching power supply parallel current-sharing |
| CN110045776A (en) * | 2019-04-29 | 2019-07-23 | 湖北三江航天万峰科技发展有限公司 | A kind of autonomous controllable type automatic flow equalization device of modular power source |
| CN110045776B (en) * | 2019-04-29 | 2020-11-06 | 湖北三江航天万峰科技发展有限公司 | Automatic current sharing device of autonomous controllable module power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20210910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |