CN105119483A - Switching power source parallel system - Google Patents
Switching power source parallel system Download PDFInfo
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- CN105119483A CN105119483A CN201510561571.7A CN201510561571A CN105119483A CN 105119483 A CN105119483 A CN 105119483A CN 201510561571 A CN201510561571 A CN 201510561571A CN 105119483 A CN105119483 A CN 105119483A
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Abstract
The invention discloses a switching power source parallel system. The switching power source parallel system includes the following components of: a master DC/DC power source module used for converting set voltage to first preset voltage and outputting master current to a load; a slave DC/DC power source module which is connected in parallel with the master DC/DC power source module and is used for converting set voltage to second preset voltage and outputting slave current to the load; a first Hall current sensor which is used for acquiring total current and generating first acquisition signals, wherein the total current is the sum of the master current and the master current; a second Hall current sensor which is used for acquiring the slave current and generating second acquisition signals; a control unit which is used for carrying out current shunting on the master DC/DC power source module and the slave DC/DC power source module according to a master-slave method, and carrying out closed-loop control on the slave current according to the first acquisition signals and second acquisition signals. The output current and the output power of the switching power source parallel system can be improved, and requirement of high-power loads can be satisfied.
Description
Technical field
The present invention relates to switch power technology field, particularly relate to a kind of switch power parallel system.
Background technology
Along with the fast development of power electronic technology, power technology is widely used in all trades and professions such as computer, industrial instruments.The requirement of all kinds of electronic system to power is also more and more higher, also increasing to the requirement of electric current.Due to the impact of the self performance such as semiconductor power device, magnetic material by formation power module, output current, the power of single switch power module are smaller, and a lot of electronic system needs larger electric current and power in prior art, visible, single switch power module can not meet the demand of high power load.
Therefore, how to provide a kind of Switching Power Supply that can meet high power load be those skilled in the art at present needs solve problem.
Summary of the invention
The object of this invention is to provide a kind of switch power parallel system, improve output current and the power output of switch power parallel system, meet the demand of high power load, achieve accurately effectively controlling switch power parallel system output current, improve the stability of switch power parallel system.
For solving the problems of the technologies described above, the invention provides a kind of switch power parallel system, comprising:
Main DC/DC power module, for given voltage transitions is become the first predeterminated voltage, and exports principal current to load;
From DC/DC power module, in parallel with described main DC/DC power module, for described given voltage transitions is become the second predeterminated voltage, and export from electric current to described load;
First Hall current sensor, for gathering total current, generates the first collection signal, and described first collection signal is sent to control unit, wherein, described total current be described principal current and described from electric current and;
Second Hall current sensor, for gathering from electric current described, generates the second collection signal, and described second collection signal is sent to described control unit;
Described control unit, for according to principal and subordinate method to described main DC/DC power module and describedly to shunt from DC/DC power module, and adopt closed-loop control to described from electric current according to described first collection signal and described second collection signal, make described principal current and meet predetermined current ratio from electric current.
Preferably, described main DC/DC power module is BUCK type power module, described from DC/DC power module be BUCK type power module.
Preferably, the described output from DC/DC power module also comprises:
Digital regulation resistance, regulates described digital regulation resistance according to described first collection signal and described second collection signal for described control unit, changes described from electric current, makes described principal current and meet predetermined current ratio from electric current.
Preferably, described switch power parallel system also comprises:
3rd Hall current sensor, for gathering described principal current, generating the 3rd collection signal, and described 3rd collection signal is sent to described control unit; Then:
Described control unit, also for adopting closed-loop control to described from electric current according to described second collection signal and described 3rd collection signal, making described principal current and meeting predetermined current ratio from electric current;
Described digital regulation resistance, also regulates described digital regulation resistance according to described second collection signal and described 3rd collection signal for described control unit, changes described from electric current, makes described principal current and meet predetermined current ratio from electric current.
Preferably, described switch power parallel system also comprises:
Supply module, for being system power supply voltage by described given voltage transitions, and being respectively described main DC/DC power module, describedly powering from DC/DC power module, described first Hall current sensor, described second Hall current sensor and described control unit.
A kind of switch power parallel system provided by the invention, comprise main DC/DC power module, from DC/DC power module, the first Hall current sensor, the second Hall current sensor and control unit, by by main DC/DC power module and be together in parallel from DC/DC power module, control unit foundation principal and subordinate method is to main DC/DC power module and shunt from DC/DC power module, improve output current and the power output of switch power parallel system, meet the demand of high power load.
In addition, control unit also adopts closed-loop control according to the first collection signal and the second collection signal to from electric current, make main current and meet predetermined current ratio from electric current, achieve accurately effectively controlling switch power parallel system output current, improve the stability of switch power parallel system.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in prior art and embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of switch power parallel system provided by the invention;
Fig. 2 is the structural representation of another kind of switch power parallel system provided by the invention.
Embodiment
Core of the present invention is to provide a kind of switch power parallel system, improve output current and the power output of switch power parallel system, meet the demand of high power load, achieve accurately effectively controlling switch power parallel system output current, improve the stability of switch power parallel system.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of switch power parallel system provided by the invention, and this switch power parallel system comprises:
Main DC/DC power module 11, for given voltage transitions is become the first predeterminated voltage, and exports principal current to load;
From DC/DC power module 12, in parallel with main DC/DC power module 11, for given voltage transitions is become the second predeterminated voltage, and export from electric current to load;
Be understandable that, control unit 15 adopts principal and subordinate's method to main DC/DC power module 11 and shunts from DC/DC power module 12, make main current and from electric current according to according to predetermined current specific output.Principal current and from electric current sum input load R, improves output current and the power output of switch power parallel system, meets the demand of high power load.
First Hall current sensor 13, for gathering total current, generates the first collection signal, and the first collection signal is sent to control unit 15, wherein, total current be principal current and from electric current and;
Be understandable that, here total current gathered, generate the first collection signal, and the first collection signal is sent to control unit 15; On the one hand, control unit 15 is facilitated directly to judge whether total current meets the demand of load R; On the other hand, control unit 15 according to total current and cited below from electric current, then can obtain by Kirchhoff's law the principal current that main DC/DC power module 11 exports, and then can obtain principal current and the current ratio from electric current.
Second Hall current sensor 14, for gathering from electric current, generates the second collection signal, and the second collection signal is sent to control unit 15;
Control unit 15, for according to principal and subordinate method to main DC/DC power module 11 and shunt from DC/DC power module 12, and adopt closed-loop control according to the first collection signal and the second collection signal to from electric current, make main current and meet predetermined current ratio from electric current.
Be understandable that, after control unit 15 receives the first collection signal of the first Hall current sensor 13 transmission and the second collection signal of the second Hall current sensor 14 transmission, can obtain main DC/DC power module 11 and from DC/DC power module 12 export total current and from DC/DC power module 12 export from electric current, the principal current of main DC/DC power module 11 output can be obtained by Kirchhoff's law, and then principal current and the current ratio from electric current can be obtained, this current ratio and predetermined current ratio compare by control unit 15 again, if unequal, then control unit 15 regulates the voltage from DC/DC power module 12 output, change further from electric current, thus the adjustment achieved principal current and the current ratio from electric current, this close loop negative feedback is utilized to control finally to realize principal current and equal predetermined current ratio from the current ratio of electric current.
A kind of switch power parallel system provided by the invention, comprise main DC/DC power module, from DC/DC power module, the first Hall current sensor, the second Hall current sensor and control unit, by by main DC/DC power module and be together in parallel from DC/DC power module, control unit foundation principal and subordinate method is to main DC/DC power module and shunt from DC/DC power module, improve output current and the power output of switch power parallel system, meet the demand of high power load.
In addition, control unit also adopts closed-loop control according to the first collection signal and the second collection signal to from electric current, make main current and meet predetermined current ratio from electric current, achieve accurately effectively controlling switch power parallel system output current, improve the stability of switch power parallel system.
Embodiment two
Please refer to Fig. 2, Fig. 2 is the structural representation of another kind of switch power parallel system provided by the invention; The switch power parallel system that the present embodiment provides is on the basis of a upper embodiment:
As preferably, main DC/DC power module 11 is BUCK type power module, is BUCK type power module from DC/DC power module 12.
As preferably, also comprise from the output of DC/DC power module 12:
Digital regulation resistance 17, regulates digital regulation resistance 17 according to the first collection signal and the second collection signal for control unit 15, changes from electric current, makes main current and meets predetermined current ratio from electric current.
Be understandable that, after control unit 15 receives the first collection signal of the first Hall current sensor 13 transmission and the second collection signal of the second Hall current sensor 14 transmission, can obtain main DC/DC power module 11 and from DC/DC power module 12 export total current and from DC/DC power module 12 export from electric current, the principal current of main DC/DC power module 11 output can be obtained by Kirchhoff's law, and then principal current and the current ratio from electric current can be obtained, this current ratio and predetermined current ratio compare by control unit 15 again, if unequal, then control unit 15 carries out adjustment change by control figure potentiometer 17 to the output voltage from DC/DC power module 12, also namely to changing from electric current of exporting from DC/DC power module 12, thus the adjustment achieved principal current and the current ratio from electric current, finally realize principal current and equal predetermined current ratio from the current ratio of electric current.
Further, resistance R1 can also be provided with from the output of DC/DC power module 12, play the effect of point pressure balanced.When changing from the output voltage of DC/DC power module 12, resistance R1 cooperates with digital regulation resistance 17 and carries out dividing potential drop, makes the voltage of resistance R1 rear end equal with the output end voltage of main DC/DC power module 11, ensures the stable of this switch power parallel system.
In addition, the output of main DC/DC power module 11 also can arrange resistance R2, plays the effect of point pressure balanced, ensures the stable of the voltage of resistance R2 rear end, ensures the stable of this switch power parallel system further.
As preferably, switch power parallel system also comprises:
3rd Hall current sensor 16, for gathering principal current, generating the 3rd collection signal, and the 3rd collection signal is sent to control unit 15; Then:
Control unit 15, also for adopting closed-loop control according to the second collection signal and the 3rd collection signal to from electric current, making main current and meeting predetermined current ratio from electric current;
Digital regulation resistance 17, also regulates digital regulation resistance 17 according to the second collection signal and the 3rd collection signal for control unit 15, changes from electric current, makes main current and meets predetermined current ratio from electric current.
Be understandable that, because adopt the 3rd Hall current sensor 16 directly to gather principal current, generate the 3rd collection signal, and the 3rd collection signal is sent to control unit 15; Thus eliminate control unit 15 and calculate this step of principal current by total current with from electric current, control unit 15 direct basis second collection signal and the 3rd collection signal regulate digital regulation resistance 17, change from electric current, make main current and meet predetermined current ratio from electric current, simplify algorithm, improve the governing speed of control unit 15 pairs of switch power parallel systems.
As preferably, switch power parallel system also comprises:
Supply module, for being system power supply voltage by given voltage transitions, and being respectively main DC/DC power module 11, powering from DC/DC power module 12, first Hall current sensor 13, second Hall current sensor 14 and control unit 15.
A kind of switch power parallel system provided by the invention, on the basis of embodiment one, also comprise the 3rd Hall current sensor, because adopt the 3rd Hall current sensor directly to gather principal current, generate the 3rd collection signal, and the 3rd collection signal is sent to control unit; Thus eliminate control unit and calculate this step of principal current by total current with from electric current, control unit direct basis second collection signal and the 3rd collection signal regulate digital regulation resistance, change from electric current, make main current and meet predetermined current ratio from electric current, simplify algorithm, improve the governing speed of control unit to switch power parallel system.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
Also it should be noted that, in this manual, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a switch power parallel system, is characterized in that, comprising:
Main DC/DC power module, for given voltage transitions is become the first predeterminated voltage, and exports principal current to load;
From DC/DC power module, in parallel with described main DC/DC power module, for described given voltage transitions is become the second predeterminated voltage, and export from electric current to described load;
First Hall current sensor, for gathering total current, generates the first collection signal, and described first collection signal is sent to control unit, wherein, described total current be described principal current and described from electric current and;
Second Hall current sensor, for gathering from electric current described, generates the second collection signal, and described second collection signal is sent to described control unit;
Described control unit, for according to principal and subordinate method to described main DC/DC power module and describedly to shunt from DC/DC power module, and adopt closed-loop control to described from electric current according to described first collection signal and described second collection signal, make described principal current and meet predetermined current ratio from electric current.
2. switch power parallel system as claimed in claim 1, it is characterized in that, described main DC/DC power module is BUCK type power module, described from DC/DC power module be BUCK type power module.
3. switch power parallel system as claimed in claim 1, it is characterized in that, the described output from DC/DC power module also comprises:
Digital regulation resistance, regulates described digital regulation resistance according to described first collection signal and described second collection signal for described control unit, changes described from electric current, makes described principal current and meet predetermined current ratio from electric current.
4. switch power parallel system as claimed in claim 3, it is characterized in that, described switch power parallel system also comprises:
3rd Hall current sensor, for gathering described principal current, generating the 3rd collection signal, and described 3rd collection signal is sent to described control unit; Then:
Described control unit, also for adopting closed-loop control to described from electric current according to described second collection signal and described 3rd collection signal, making described principal current and meeting predetermined current ratio from electric current;
Described digital regulation resistance, also regulates described digital regulation resistance according to described second collection signal and described 3rd collection signal for described control unit, changes described from electric current, makes described principal current and meet predetermined current ratio from electric current.
5. the switch power parallel system as described in any one of claim 1-4, is characterized in that, described switch power parallel system also comprises:
Supply module, for being system power supply voltage by described given voltage transitions, and being respectively described main DC/DC power module, describedly powering from DC/DC power module, described first Hall current sensor, described second Hall current sensor and described control unit.
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| CN201510561571.7A CN105119483A (en) | 2015-09-06 | 2015-09-06 | Switching power source parallel system |
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| CN201510561571.7A CN105119483A (en) | 2015-09-06 | 2015-09-06 | Switching power source parallel system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106230252A (en) * | 2016-10-10 | 2016-12-14 | 哈尔滨龙计测试技术开发公司 | A kind of high-precision high-power DC source |
| CN107294375A (en) * | 2015-09-14 | 2017-10-24 | 广东欧珀移动通信有限公司 | A kind of intelligent DC conversion equipment and application system |
| CN111130337A (en) * | 2019-12-03 | 2020-05-08 | 浪潮金融信息技术有限公司 | Audio isolation noise reduction scheme based on power isolation |
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| CN203522527U (en) * | 2013-06-07 | 2014-04-02 | 昆明理工大学 | Power supply system with switching power supplies connected in parallel |
| CN203967755U (en) * | 2014-07-29 | 2014-11-26 | 株洲南车时代电气股份有限公司 | A kind of power supply parallel operation sharing control system |
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Patent Citations (3)
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| CN1286519A (en) * | 1999-08-26 | 2001-03-07 | 朗迅科技公司 | Distributing panel capable of installing power supply module with multifunctional control lead |
| CN203522527U (en) * | 2013-06-07 | 2014-04-02 | 昆明理工大学 | Power supply system with switching power supplies connected in parallel |
| CN203967755U (en) * | 2014-07-29 | 2014-11-26 | 株洲南车时代电气股份有限公司 | A kind of power supply parallel operation sharing control system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294375A (en) * | 2015-09-14 | 2017-10-24 | 广东欧珀移动通信有限公司 | A kind of intelligent DC conversion equipment and application system |
| CN107294375B (en) * | 2015-09-14 | 2019-05-21 | Oppo广东移动通信有限公司 | A kind of intelligent DC conversion equipment and application system |
| CN106230252A (en) * | 2016-10-10 | 2016-12-14 | 哈尔滨龙计测试技术开发公司 | A kind of high-precision high-power DC source |
| CN106230252B (en) * | 2016-10-10 | 2018-08-31 | 哈尔滨龙计测试技术开发公司 | A kind of high-precision high-power DC power supply |
| CN111130337A (en) * | 2019-12-03 | 2020-05-08 | 浪潮金融信息技术有限公司 | Audio isolation noise reduction scheme based on power isolation |
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