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Multi-power-supply parallel current sharing control method based on online control

A flow control, multi-power technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of slow regulation speed, low accuracy of current sharing control, fast response adjustment, etc.

Active Publication Date: 2020-10-27
SHENZHEN JIANWANG TECH
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AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a multi-power supply parallel current sharing control method based on online control, which solves the problems of slow control speed and low accuracy of current sharing control in the prior art for parallel connection of multiple power supply modules. And the problem of not being able to quickly respond to adjustments with load changes

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Embodiment Construction

[0019] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0020] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field of the present invention. Terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not used to limit the present invention. The term "...

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Abstract

The invention discloses a multi-power-supply parallel current sharing control method based on online control. The method comprises the steps of line setting, online grouping and current sharing control. A plurality of power modules connected in parallel are uniformly connected to a control end through a control circuit in the form of a CAN bus; a required power supply module is selected from a plurality of power supply modules by the control end according to set working parameters, the power supply module is taken as a working group, a working current value of each working power supply moduleis collected in the working group during current-sharing control, then calculating is performed to obtain an average current value and a current-limiting value, and an output voltage and an output current are adjusted according to the current-limiting value. The method is rapid and concise in power supply module grouping, simple in current sharing control, good in current sharing performance, highin precision, fast in load dynamic response, stable in work and strong in anti-interference capability.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to an on-line control-based parallel current sharing control method for multiple power sources. Background technique [0002] With the continuous development of electronic technology, the market demand for high-power power supply is more and more extensive. However, the existing single modular power supply cannot meet the market demand. [0003] The parallel connection technology of power modules has the characteristics of flexible expansion, high power, high reliability, easy management and easy installation, which makes it rise rapidly in the power industry, and current sharing is particularly important in the parallel technology of power modules. [0004] In the prior art, the droop method is used to achieve current sharing. This method is relatively simple, and it is essentially an open-loop control. Therefore, the current sharing performance is poor, and the performance is eve...

Claims

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Application Information

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IPC IPC(8): H02M1/32H02M1/36H02M1/44
CPCH02M1/32H02M1/36H02M1/44
Inventor 张勇波谢勇
Owner SHENZHEN JIANWANG TECH
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