Method and circuit for keeping constant power output of multiple power supply modules, and power supply module

A power module, constant power technology, applied in the field of switching power supply, can solve the problems of increasing circuit complexity, large drop in load regulation index, restrictions, etc., to achieve the effect of improving dynamic response capability and improving load regulation index

Inactive Publication Date: 2021-01-22
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Current sharing control is usually divided into two types: active current sharing and passive current sharing. Passive current sharing uses the droop characteristic that the output voltage of the power module decreases with the increase of load. It is simple and reliable, but the difference in load distribution increases with the increase of load. The load regulation index of the paralle

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  • Method and circuit for keeping constant power output of multiple power supply modules, and power supply module
  • Method and circuit for keeping constant power output of multiple power supply modules, and power supply module
  • Method and circuit for keeping constant power output of multiple power supply modules, and power supply module

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application.

[0025] Such as figure 1 As shown, the method for maintaining constant power output of multiple power supply modules provided by this application includes the following steps:

[0026] S1. Obtain the output current of each power module in the plurality of power modules;

[0027] S2, judging the relationship between the current output current of the power module and the rated current;

[0028] S3. When the output current is not greater than the rated current, the current power module outputs at a constant voltage; when the output current is greater than the rated current, reduce the output voltage of the current power module and increase the output current of the current power module to make the current power mo

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Abstract

The invention provides a method for keeping constant-power output of multiple power supply modules. The method comprises the following steps: acquiring output current of each power supply module in multiple power supply modules; judging the relationship between the output current of the current power supply module and rated current; when the output current is not greater than the rated current, making the current power supply module output at a constant voltage; and when the output current is greater than the rated current, reducing the output voltage of the current power supply module, and increasing the output current of the current power supply module to make the current power supply module output at constant power, so that constant power output can be realized when multiple power supply modules are output in parallel. According to the method provided by the invention, the complexity of the power supply module is not increased, and passive current sharing can be realized by only changing the output characteristics of the power supply module, so that the load regulation rate index of passive current sharing is improved, the internal control loop bandwidth of the power supply module is shared during parallel application, and the dynamic response capability during a periodic pulse load period is improved.

Description

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Claims

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Application Information

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Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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