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DC power supply and charging circuit thereof

A technology of DC power supply and charging circuit, which is applied in the field of automation and can solve problems such as low power conversion efficiency

Pending Publication Date: 2021-02-26
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to address the problem of low power conversion efficiency of the traditional DC power supply and its charging circuit, and provide a DC power supply and its charging circuit to achieve the effect of improving the power conversion efficiency

Method used

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  • DC power supply and charging circuit thereof
  • DC power supply and charging circuit thereof
  • DC power supply and charging circuit thereof

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0021] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. ...

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Abstract

The invention relates to a DC power supply and a charging circuit thereof. The charging circuit of the DC power supply comprises a first voltage division unit, a control unit, a switch unit, a secondvoltage division unit, an energy storage unit and a shunt unit. The first voltage division unit is connected with a pre-stage circuit, the energy storage unit is connected with a post-stage circuit, and the second voltage division unit is connected with the energy storage unit. The control unit is connected with the first voltage division unit and the second voltage division unit, and is also connected with the control end of the switch unit; the first end of the shunt unit is connected with the pre-stage circuit, the second end of the shunt unit is connected with the energy storage unit, thefirst end of the switch unit is connected with the first end of the shunt unit, and the second end of the switch unit is connected with the second end of the shunt unit; and when the sampling voltageof the second voltage division unit is larger than that of the first voltage division unit, the control unit enables the switch unit to be closed, the shunt unit is short-circuited, energy consumptionof the shunt unit can be reduced, and power conversion efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of automation, in particular to a DC power supply and a charging circuit thereof. Background technique [0002] For loads that need to be powered by DC, it is usually necessary to use a DC power supply to provide them with working power. In the traditional DC power supply charging circuit, because the energy storage capacitor is equivalent to a short circuit state at the moment of power-on, a large surge current will be generated, which will not only increase the current stress of each device in the charging circuit, but also affect the current stress of each device in the previous stage circuit. Current stress, which affects the reliability of the DC power supply. In order to limit the inrush current, a resistor is usually connected to the main circuit between the pre-stage circuit and the energy storage capacitor. However, due to the existence of this resistor, additional loss will be added when...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/00304
Inventor 谭亮李秋莲曾云洪
Owner GREE ELECTRIC APPLIANCES INC
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