Switching tube protection circuit and switching device

A technology for protecting circuits and switching tubes, which is applied to emergency protection circuit devices, output power conversion devices, electrical components, etc., can solve problems such as damage to the switching tubes, and achieve the effect of protecting the switching tubes and improving operational reliability.

Pending Publication Date: 2021-05-28
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to solve the problem that the traditional switch tube is easily damaged due to unstable power supply, and provide a switch tube protection circuit and a switch device, which can achieve the effect of improving the operation reliability of the switch tube

Method used

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  • Switching tube protection circuit and switching device
  • Switching tube protection circuit and switching device

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Embodiment Construction

[0022] 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.

[0023] 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.

[0024] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element, or connected to the other element through an inte...

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PUM

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Abstract

The invention relates to a switching tube protection circuit and a switching device, the protection circuit comprises a sampling circuit, an absorption buffer loop and a processing circuit, the sampling circuit is connected with a first end and a second end of a switching tube, the absorption buffer loop is connected with the first end and the second end of the switching tube, and the processing circuit is connected with a control end of the switching tube, the sampling circuit and a control device. When the voltages of the first end and the second end of the switching tube are too high, the switching tube can be switched off through the processing circuit, and the voltage is absorbed by the absorption buffer loop, so that a voltage peak between the first end and the second end of the switching tube is avoided, the effect of protecting the switching tube is achieved, and the operation reliability of the switching tube is improved.

Description

technical field [0001] The present application relates to the technical field of circuit protection, in particular to a switch tube protection circuit and a switch device. Background technique [0002] Field effect transistor is an electronic device that uses electric field effect to control current, including source, gate and drain. FETs control current flow by applying a voltage to the gate, which in turn changes the conductivity between the drain and source. As a switch tube, field effect transistors have been widely used in various circuits. [0003] In the actual operation of the circuit, it is often encountered that the switch tube is damaged due to unstable power supply, especially during the debugging process, which is more likely to occur, causing serious electrical safety hazards. How to protect the switch tube from being damaged and improve the operation reliability of the switch tube is an urgent problem to be solved. Contents of the invention [0004] Based...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M1/34H02H7/12
CPCH02H7/1213H02M1/34H02M3/156
Inventor 程文峰曾云洪
Owner GREE ELECTRIC APPLIANCES INC
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