Undervoltage protection circuit

A technology of undervoltage protection and circuit, which is applied in the field of automatic control and can solve problems such as load damage

Pending Publication Date: 2021-03-02
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides an undervoltage protection circuit to overcome the problem that the load is damaged due to the abnormal working state of the load during undervoltage

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Embodiment Construction

[0033] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0034] In order to avoid damage to the load caused by the abnormal working state of the load in the undervoltage state, the embodiment of the present application proposes the following technical idea: provide an undervoltage protection circuit, and when the undervoltage occurs, the control circuit is turned off, so that The load stops working, thereby avoidin...

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PUM

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Abstract

An embodiment of the invention provides an undervoltage protection circuit, which comprises a power supply, a control circuit, a switching circuit and a load, wherein the control circuit is respectively connected with the switching circuit and the power supply, and is used for controlling the switching-on or switching-off of the switching circuit; the load is connected with the switch circuit andthe power supply, and the switch circuit is used for controlling power-on or power-off of the load; when a power supply voltage is greater than or equal to a preset voltage, the control circuit is switched on, the switch circuit is switched on, and the load is electrified; and when the power supply voltage is smaller than the preset voltage, the control circuit is switched off, the switching circuit is switched off and the load is powered off. The switching circuit is controlled by the control circuit, and the load is controlled by the switching circuit, so that undervoltage protection of theload is effectively realized when the power supply voltage is smaller than the preset voltage.

Description

technical field [0001] The embodiment of the present application relates to an automatic control technology, and in particular to an undervoltage protection circuit. Background technique [0002] When the load is working, the load usually needs to be connected to a power supply, wherein the power supply can supply power to the load so that the load can work. [0003] Wherein, the power supply for power supply can be, for example, a DC power supply. In the scenario where the DC power supply is used for power supply, when the voltage of the DC power supply is normal or high, the load can work normally; however, when the voltage of the DC power supply is low, the load Will be in an abnormal working state, wherein, when the load is in an abnormal working state, it will cause the load to be damaged. Contents of the invention [0004] The embodiment of the present application provides an undervoltage protection circuit to overcome the problem that the load is damaged due to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/24
CPCH02H3/243
Inventor 吕凤龙张正兴张跃增
Owner WEICHAI POWER CO LTD
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