Current sharing control method, device and system for multi-phase parallel system

A flow control and paralleling technology, applied in the field of power supply, can solve the problems of increasing the complexity of the power supply system, and achieve the effect of avoiding the complexity, improving the performance, and avoiding the increase of the power supply system.

Active Publication Date: 2012-11-07
HUAWEI DIGITAL POWER TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, screening devices based on high-precision indicators will inevitably increase the implementation complexity of the power system

Method used

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  • Current sharing control method, device and system for multi-phase parallel system
  • Current sharing control method, device and system for multi-phase parallel system
  • Current sharing control method, device and system for multi-phase parallel system

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Embodiment Construction

[0024] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0025] figure 1 This is a flowchart of a multi-phase parallel current sharing control method provided by an embodiment of the present invention. Such as figure 1 As shown, the multi-phase parallel current sharing control method provided by this embodiment can be specifically applied to the current sharing control of a multi-phase para...

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Abstract

The embodiment of the invention discloses a current sharing control method, device and system for a multi-phase parallel system. The method comprises the following steps: detecting the output current of each phase of a power system; comparing the output current with preset current so as to determine that the phase with output current larger than the preset current is the phase required to be adjusted; and generating a current sharing control signal according to the preset current and the output current of the phase required to be adjusted, so as to control the output of the phase to control the delay conduction of a switch, thereby allowing the current output by the phase to be reduced. According to the method, the device and the system, the workload of selecting devices is avoided, which reduces the cost; and the current sharing control for the output current of the multi-phase parallel power system is realized, and the performance of the power system is improved.

Description

Technical field [0001] The embodiments of the present invention relate to power supply technology, and in particular to a multi-phase parallel current sharing control method, device and system. Background technique [0002] In high-power power supply systems, due to the influence of ripple current and heat dissipation, multi-phase parallel power supply technology is often used. The multi-phase parallel topology design will divide the power equally into each phase, and then need to calculate the parameters of each phase, but because the parameters between the phases cannot be consistent, there will be deviations, especially the deviation of magnetic components is about 5%. The capacitance deviation is also about 3%, and the difference in device parameters directly causes ripple, cost, protection, etc. to be difficult to control. Therefore, the current sharing control of the multi-phase parallel connection becomes a problem that the multi-phase parallel technology must face. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 徐金柱
Owner HUAWEI DIGITAL POWER TECH CO LTD
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