CN102545899A - Current equalization control method for analog power module and digital power module hybrid plug power system - Google Patents
Current equalization control method for analog power module and digital power module hybrid plug power system Download PDFInfo
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Abstract
The invention discloses a current equalization control method for an analog power module and digital power module hybrid plug power system. The current equalization control method comprises the following steps of: tracking average output current of an analog power module in real time by using average output current of a digital power module; when the average output current of the digital power module is higher than the average current of a power system, automatically adjusting downwards output voltage of the digital power module through a monitoring unit, thereby keeping the average output current of the digital power module equal to the average output current of the analog power module; and when the average output current of the digital power module is lower than the average current of the power system, automatically adjusting upwards the output voltage of the digital power module through the monitoring unit, thereby keeping the average output current of the digital power module equal to the average output current of the analog power module. According to the current equalization control method, current equalization output of the analog power module and digital power module hybrid plug power system can be realized.
Description
Technical field
The present invention relates to power technique fields, particularly a kind of current-sharing control method of analog-and digital-power module mixed insertion power-supply system.
Background technology
The large power, electrically origin system adopts a plurality of power module parallel runnings to realize, is one of developing direction of present power technology.The modular power of parallel running has that capacity be prone to expand, reliability is high, use flexibly, be convenient to advantage such as maintenance; The core that realizes the power module parallel running is exactly a flow equalize technology, just current-sharing control method (being that each module mean allocation same current is given load).Power-supply system on the market generally comprises analog power module and digital power module, its current-sharing control method corresponding respectively analog quantity current-sharing control method and digital quantity current-sharing control method arranged.The constantly perfect of progressively reduction and Switching Power Supply Non-Linear Control Theory and method of controlling cost of digital module power supply; The digitlization of Switching Power Supply and digital current-sharing technology more and more become development trend; Particularly digital current-sharing have its flexibly programmed method, affected by environment little, circuit is succinct, communication speed is fast, can realize the advantages such as electrical isolation between the bus node, development speed is very fast.And the analog power module, its occupation rate of market is higher than the digital power module again.For analog power module and digital power module on the market are fully utilized; We adopt analog power module and digital power module to carry out the power-supply system of mixed insertion; Be about to the input parallel connection of analog power module and digital power module; Output parallel connection, its input are connected on interchange or the direct current network, and its output is given load or powered battery.But, carry out in the power-supply system of mixed insertion in analog power module and digital power module, analog power module and digital power module, its output impedance is unbalanced, can cause the problem of the output current maldistribution of each module.Be that low simulation of output impedance or digital power module are born more multiple current, in addition overload, the temperature of module is raise, thus the life-span of having reduced module; It is little that the high analog-and digital-module of output impedance is shared electric current, even no-load running; Like this, the fully loaded for a long time work of the power module that causes, the power module no-load running that has greatly reduces the efficient of system.Therefore, must take efficient system current-sharing measure, improve system effectiveness, increase the stability of a system and reliability, safeguards system is moved reliably and with long-term.
Summary of the invention
Technical problem to be solved by this invention is, overcomes above deficiency, and a kind of current-sharing control method of analog-and digital-power module mixed insertion power-supply system is provided.
In order to solve the problems of the technologies described above; Technical scheme of the present invention is: a kind of current-sharing control method of analog-and digital-power module mixed insertion power-supply system; Utilize the average output current I1 of digital power module to follow the average output current I2 of analog power module in real time; Wherein, the output capacity of each digital power module is identical, and the output capacity of each analog power module is identical; When the average output current I1 of digital power module is higher than the average current I of said power-supply system; Automatically turn down the output voltage of said digital power module through monitoring unit; To turn down the average output current of digital power module, make the average output current I1 of digital power module equal the average output current I2 of analog power module; When the average output current I1 of digital power module is lower than the average current I of said power-supply system; Automatically heighten the output voltage of said digital power module through monitoring unit; To heighten the average output current of digital power module, make the average output current I1 of digital power module equal the average output current I2 of analog power module; Wherein, I=(I1+I2)/2.
Further, said monitoring unit is arranged in the said digital power module.
Further, said monitoring unit is arranged in the said power-supply system.
Further, said monitoring unit is separately positioned in said digital power module and the power-supply system.
The present invention utilizes the average output current I1 of digital power module to follow the control method of the average output current I2 of analog power module in real time; Make the average output current I1 of digital power module equal the average output current I2 of analog power module; Be I1=I2, thereby make digital power module and analog power module mixed insertion power-supply system realize the purpose of current-sharing output.
Embodiment
Describe in detail in the face of the present invention down:
Analog-and digital-power module mixed insertion power-supply system promptly comprises the analog power module and the digital power module of a plurality of parallel connections, and wherein, the output capacity of each digital power module is identical, and the output capacity of each analog power module is identical.In analog-and digital-power module mixed insertion power-supply system; Because the output voltage response speed of analog power module is fast; The current equalizing bus bar that connects of analog power module output through a plurality of parallel connections again makes the analog power module can reach the effect of current-sharing output fast, therefore; As long as make the average output current of digital power module follow the average output current of analog power module in real time, just can make power-supply system reach the purpose of current-sharing output.
The current-sharing control method of the analog-and digital-power module mixed insertion of the present invention power-supply system utilizes the average output current I1 of digital power module to follow the average output current I2 of analog power module in real time;
When the average output current I1 of digital power module is higher than the average current I of said power-supply system; Automatically turn down the output voltage of said digital power module through monitoring unit; To turn down the average output current of digital power module; Make the average output current I1 of digital power module equal the average output current I2 of analog power module, i.e. I1=I2;
When the average output current I1 of digital power module is lower than the average current I of said power-supply system; Automatically heighten the output voltage of said digital power module through monitoring unit; To heighten the average output current of digital power module; Make the average output current I1 of digital power module equal the average output current I2 of analog power module, i.e. I1=I2;
Wherein, I=(I1+I2)/2, the average current I1 of digital power module equal to be connected in parallel on the quantity of the total current of digital power module in the power-supply system divided by the digital power module; The average current I2 of analog power module equals to be connected in parallel on the quantity of the total current of the analog power module in the power-supply system divided by the analog power module.
Wherein, said monitoring unit can be arranged in the digital power module; Also can be arranged in the power-supply system; Can also be separately positioned in digital power module and the power-supply system.
When the monitoring unit setting is separately positioned in digital power module and the power-supply system; Its advantage is: when the monitoring unit in being arranged on the digital power module lost efficacy; Can be through being arranged on the output voltage of the monitoring unit adjustment digital power module in the power-supply system; Thereby the average output current I1 that makes the digital power module equals the average output current I2 of analog power module, i.e. I1=I2, thus realize the current-sharing output control of power-supply system; When the monitoring unit in being arranged on power-supply system lost efficacy; Can be through being arranged on the output voltage of the monitoring unit adjustment digital power module in the digital power module; Thereby the average output current I1 that makes the digital power module equals the average output current I2 of analog power module; Be I1=I2, with the purpose of the current-sharing output that realizes power-supply system.
For example: in analog-and digital-power module mixed insertion power-supply system; The load current of supposing this moment is 40A; We hope that analog-and digital-power module bears identical load (being the electric current of every group of analog power module output 10A, the electric current of every group of digital power module output 10A).Adopt 2 pool-sizes to be respectively the analog power module of 20A and digital power module that 2 pool-sizes are respectively 20A is that load provides electric current, at this moment, when said power-supply system starts; Because the response speed of analog power module is fast, the response speed of digital power module is slow, and the digital power module can not change its current value immediately; Then the output current of every group of analog power module is 20A, and every group of digital power module is because its response speed is slow; Therefore the output current of every group of digital power module is very little, is about 0A, and promptly the average output current of analog power module is 20A; The average output current of digital power module approximates 0A, and at this moment, total output current 40A of power-supply system is that 2 groups of analog power modules provide; Hence one can see that, and the output current of power-supply system analog power module and digital power module is unbalanced.At this moment, total output current of adjustment power-supply system is 40A, and promptly every group of analog-and digital-power module all is output as the electric current of 10A; Because the analog power module is fast owing to response speed, and the response speed of digital power module is slow, then the output current of every group of analog power module is 10A again; The output current of every group of digital power module approximates 0A, and promptly the average output current of digital power module approximates 0A, and the average output current of power-supply system is (10A+10A+0A+0A)/4=5A; Hence one can see that; The average output current of digital power module at this moment, is heightened the output voltage of digital power module less than the average output current of power-supply system through monitoring unit; Thereby make the average output current of digital power module be increased to 10A fast; Be 10A with the average output current of realization analog power module and the average output current of digital power module, thereby make power-supply system reach the purpose of current-sharing output, promptly the output current of every group of analog power module and every group of digital power module is 10A.
For another example: when load capacity was reduced to 20A by 40A, when each analog power module of adjustment power-supply system and digital power module were all exported 5A, the output current I2 of each analog power module can be reduced to 5A fast from 10A; And each digital power module still can keep original output current, i.e. I1=10A because response speed is slow; The output current that is power-supply system is unbalanced, and at this moment, the average output current of power-supply system is (10A+10A+5A+5A)/4=7.5A; Hence one can see that; The average output current 10A of digital power module at this moment, turns down the output voltage of digital power module greater than the average current 7.5A of power-supply system through monitoring unit; Thereby the average output current I1 that makes the digital power module equals the average output current I2 of analog power module and equals 5A; Be I1=I2=5A, thereby make power-supply system reach the purpose of current-sharing output, and reach the demand of load capacity.
Also as: when load capacity increases to 80A by 40A, each analog power module and the electric current that the digital power module is all exported 20A of adjustment power-supply system, the output current I2 of each analog power module can be increased to 20A fast from 10A; And each digital power module still can keep original output current, i.e. I1=10A because response speed is slow; The output current that is power-supply system is unbalanced; At this moment, the average output current of power-supply system is (20A+20A+10A+10A)/4=15A, and hence one can see that; The average output current 10A of digital power module is less than the average output current 15A of power-supply system; At this moment, heighten the output voltage of digital power module, thereby the average output current I2 that makes the average output current I1 of digital power module equal the analog power module equals 20A through monitoring unit; Be I1=I2=20A, thereby make power-supply system reach the purpose of current-sharing output.
In sum; The present invention utilizes the average output current I1 of digital power module to follow the control method of the average output current I2 of analog power module in real time; Make the average output current I1 of digital power module equal the average output current I2 of analog power module; Be I1=I2, thereby make digital power module and analog power module mixed insertion power-supply system realize the purpose of power-supply system current-sharing output.
The present invention; Be not limited to above-mentioned execution mode; Also can utilize total output current of digital power module to follow total output current of analog power module in real time; Make total output current of digital power module equal total output current of analog power module, thereby make digital power module and analog power module mixed insertion power-supply system realize what the power-supply system current-sharing was exported.
Claims (4)
1. the current-sharing control method of an analog-and digital-power module mixed insertion power-supply system; It is characterized in that; Utilize the average output current I1 of digital power module to follow the average output current I2 of analog power module in real time; Wherein, the output capacity of each digital power module is identical, and the output capacity of each analog power module is identical;
When the average output current I1 of digital power module is higher than the average current I of said power-supply system; Automatically turn down the output voltage of said digital power module through monitoring unit; To turn down the average output current of digital power module, make the average output current I1 of digital power module equal the average output current I2 of analog power module;
When the average output current I1 of digital power module is lower than the average current I of said power-supply system; Automatically heighten the output voltage of said digital power module through monitoring unit; To heighten the average output current of digital power module, make the average output current I1 of digital power module equal the average output current I2 of analog power module;
Wherein, I=(I1+I2)/2.
2. the current-sharing control method of analog-and digital-power module mixed insertion power-supply system according to claim 1 is characterized in that, said monitoring unit is arranged in the said digital power module.
3. the current-sharing control method of analog-and digital-power module mixed insertion power-supply system according to claim 1 is characterized in that said monitoring unit is arranged in the said power-supply system.
4. the current-sharing control method of analog-and digital-power module mixed insertion power-supply system according to claim 1 is characterized in that, said monitoring unit is separately positioned in said digital power module and the power-supply system.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103812508A (en) * | 2012-11-12 | 2014-05-21 | 中兴通讯股份有限公司 | Current sharing device, method and system |
| CN106104412A (en) * | 2014-04-14 | 2016-11-09 | 株式会社村田制作所 | Power-supply system |
| CN106169776A (en) * | 2016-06-30 | 2016-11-30 | 温州大学 | Take into account the parallel operation system power supply module number fuzzy control method of efficiency and current-sharing index |
| CN108563089A (en) * | 2018-02-06 | 2018-09-21 | 青岛海信激光显示股份有限公司 | Laser control device, the method and laser projection device for reducing laser noise |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103812508A (en) * | 2012-11-12 | 2014-05-21 | 中兴通讯股份有限公司 | Current sharing device, method and system |
| CN103812508B (en) * | 2012-11-12 | 2019-03-15 | 中兴通讯股份有限公司 | Current equalizer, method and system |
| CN106104412A (en) * | 2014-04-14 | 2016-11-09 | 株式会社村田制作所 | Power-supply system |
| CN106104412B (en) * | 2014-04-14 | 2018-12-04 | 株式会社村田制作所 | Power-supply system |
| CN106169776A (en) * | 2016-06-30 | 2016-11-30 | 温州大学 | Take into account the parallel operation system power supply module number fuzzy control method of efficiency and current-sharing index |
| CN108563089A (en) * | 2018-02-06 | 2018-09-21 | 青岛海信激光显示股份有限公司 | Laser control device, the method and laser projection device for reducing laser noise |
| CN108563089B (en) * | 2018-02-06 | 2021-05-18 | 青岛海信激光显示股份有限公司 | Laser control device, method for reducing noise of laser and laser projection equipment |
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