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DC electronic arc-extinguishing device

An electronic arc extinguishing and capacitor technology, applied in the electrical field, can solve the problems of easy burnout and short electrical life of mechanical switches, and achieve the effects of high reliability, low cost and reasonable design.

Inactive Publication Date: 2015-12-23
GUANGZHOU JINSHI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in electrical control systems such as automobiles and electric power, mechanical switches such as relays and contactors are widely used to control the on-off of loads. Due to the existence of bouncing arcs and breaking arcs in mechanical switches, the mechanical switches are easy to burn out and the electrical life is reduced. short disadvantage

Method used

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  • DC electronic arc-extinguishing device
  • DC electronic arc-extinguishing device

Examples

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Embodiment 1

[0024] In the DC electronic arc extinguishing device of Embodiment 1, the control circuit (A) is connected to the main circuit of the power semiconductor device Q1 through the capacitor C1. Since the capacitor has the characteristics of communicating AC and blocking DC, the DC electronic arc extinguishing device of the present invention does not need static sampling current, and When the mechanical switch operates, due to the sudden change of the voltage at both ends of the main circuit of the power semiconductor device Q1, a larger sampling current can be obtained through the capacitor, or a resistor can be used instead of the capacitor, but there will be a static sampling current, and the fuse part F1 can be used in this device. When the power semiconductor device breaks down and is damaged, the main circuit of the power semiconductor device can be automatically fused without affecting the load; the power semiconductor device can use full-control semiconductor devices such as ...

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Abstract

The invention discloses a DC electronic arc-extinguishing device which belongs to the field of electricity, particularly a DC electronic arc-extinguishing device suitable for extinguishing arc for a mechanical switch. The DC electronic arc-extinguishing device comprises a power semiconductor device which is parallelly connected with both ends of the mechanical switch in need of arc extinguishing, and is characterized in that a control end of the power semiconductor device is connected with a control circuit, a main loop of the power semiconductor device is connected with the control circuit through a capacitor or a resistor, voltage variations at both ends of the main loop of the power semiconductor device are connected to the control circuit through a capacitor or a resistor, and the control circuit generates a pulse control signal to control the power semiconductor device to be switched on. The DC electronic arc-extinguishing device has the advantages of extremely short switching-on time required by the power semiconductor device, low cost and high reliability.

Description

technical field [0001] The DC electronic arc extinguishing device of the present invention belongs to the electrical field, in particular a DC electronic arc extinguishing device suitable for use in relays, contactors, circuit breakers and other mechanical switches as DC arc extinguishing. Background technique [0002] At present, in electrical control systems such as automobiles and electric power, mechanical switches such as relays and contactors are widely used to control the on-off of loads. Due to the existence of bouncing arcs and breaking arcs in mechanical switches, the mechanical switches are easy to burn out and the electrical life is reduced. short downside. Contents of the invention [0003] The purpose of the present invention is to avoid the disadvantages of the existing electronic arc extinguishing device and provide a DC electronic arc extinguishing device which can be applied to various mechanical switch electronic arc extinguishing, has short conduction t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/30
CPCH01H9/30
Inventor 郭桥石赖斌龙邓达
Owner GUANGZHOU JINSHI ELECTRONICS
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