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Direct-current arc extinguishing circuit and device

An arc-extinguishing circuit and arc-extinguishing technology, applied in circuits, electrical switches, electrical components, etc., can solve problems such as short electrical life of mechanical switches, achieve fast arc-extinguishing speed, reduce breaking voltage, and achieve good arc-extinguishing effect.

Active Publication Date: 2020-04-10
GUANGZHOU JINSHI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of short electrical life of the mechanical switch in the existing DC electric control system, and to provide a DC arc extinguishing circuit with good arc extinguishing effect, reduced mechanical switch breaking voltage (arc breaking voltage), and fast arc extinguishing speed. device

Method used

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  • Direct-current arc extinguishing circuit and device
  • Direct-current arc extinguishing circuit and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] Embodiment 1 of the DC arc extinguishing device of the present invention, such as image 3 Shown:

[0060] A DC arc extinguishing circuit, the mechanical switch K1 required for arc extinguishing is connected in series with the load RL1, including power semiconductor device TR1 (semi-controlled device, bidirectional thyristor) and capacitor C1, during the breaking process of mechanical switch K1, the power semiconductor device TR1 The potential difference between the two ends of the mechanical switch K1 is greater than 5 volts; the current passes through the power semiconductor device TR1 and the load RL1 for breaking and extinguishing the mechanical switch K1, and the current is the charging current of the capacitor C1.

[0061] A DC arc extinguishing device, which includes the aforementioned DC arc extinguishing circuit, and also includes a first semiconductor device Z1 (zener diode), the trigger electrode of the power semiconductor device TR1 passes through the first ...

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PUM

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Abstract

The invention relates to a direct-current arc extinguishing circuit and a direct-current arc extinguishing device, and in particular to a direct-current arc extinguishing circuit and a direct-currentarc extinguishing device which are suitable for quick arc extinguishing of mechanical contacts such as mechanical switches. The direct-current arc extinguishing circuit comprises a power semiconductordevice and a capacitor, the power semiconductor device is connected with the capacitor, and in the breaking process of the mechanical switch, the potential difference of the power semiconductor device at the two ends of the mechanical switch is larger than 5 volts; and a current passes through the power semiconductor device and the load and is used for breaking and arc extinguishing of the mechanical switch, and the current is a charging current or a discharging current of the capacitor. The arc extinguishing device is reasonable in design and has the advantages of low cost and high arc extinguishing speed.

Description

[0001] This application is a divisional application with an application date of July 18, 2018, an application number of 201810791947.7, and an application name of "DC arc extinguishing circuit and device". technical field [0002] The invention relates to a DC arc extinguishing circuit and device, especially a DC arc extinguishing circuit and device suitable for quickly extinguishing arcs on mechanical contacts such as mechanical switches, and can also be used for other breakpoints (such as fusing of fuses, plugs, etc.) Arc extinguishing between breakpoints and sockets, wire breakpoints). Background technique [0003] At present, in DC electric control systems such as new energy vehicles, rail transit, ships, etc., mechanical switches such as contactors (relays) are widely used to control the on and off of loads. Since DC has no zero point, its breaking arc is large, and there is a mechanical switch cost. High (high voltage contactor) and short electrical life, the greater t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/54H01H9/30
CPCH01H9/30H01H9/542H01H9/54H01H2009/546H01H9/547H01H9/548H01H33/596
Inventor 郭桥石
Owner GUANGZHOU JINSHI ELECTRONICS