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A stepped wave clipping and arc extinguishing method and an arc extinguisher

An arc extinguisher and wave cutting technology, which is applied to emergency protection circuit devices, electrical components, and electrical switches for limiting overcurrent/overvoltage, etc., can solve problems such as reducing the service life of contacts, avoid arcing, Improve the effect, work reliably

Pending Publication Date: 2019-01-11
李振奎
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This arc extinguishing method changes the atmospheric environment prone to arcing into a vacuum environment with good insulation, but it cannot change the sudden electric field on the contacts, and there is still the problem of reducing the service life of the contacts

Method used

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  • A stepped wave clipping and arc extinguishing method and an arc extinguisher
  • A stepped wave clipping and arc extinguishing method and an arc extinguisher

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] In the present invention, referring to the order of getting electricity, the side that gets electricity first is defined as the front side, and the side that gets electricity later is defined as the rear side accordingly.

[0033] The gist of the present invention is that more than two arc-extinguishing branches are connected in parallel on the main switch connected in series in the main circuit, and each arc-extinguishing branch is connected in series with an auxiliary switch for controlling the on-off of the arc-extinguishing branch; When the power supply of the main circuit is turned on, first turn on the auxiliary switches in sequence, so that each arc-extinguishing branch is gradually connected, and then turn on the main switch; Open each auxiliary switch to gradually disconnect each arc extinguishing branch.

[0034] The...

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Abstract

The invention provides a stepped wave clipping and arc extinguishing method and an arc extinguisher and belongs to the technical field of emergency protection circuit devices. The invention comprisesa main switch connected in series in a main loop, and is characterized in that more than two arc-extinguishing branches are connected in parallel to the main switch, auxiliary switches for controllingthe arc-extinguishing branches on and off are connected in series in each arc-extinguishing branch, the auxiliary switches are connected with a timing control circuit, and the timing control circuitautomatically sequentially controls the on and off of each arc-extinguishing branch through the auxiliary switches. By controlling the turn-on or turn-off sequence of the main switch and each auxiliary switch, the arc extinguisher can make the starting current increase step by step when the power supply is turned on, realizing the soft start while weakening the impact on the power network caused by the instantaneous sharp increase of the starting current; and the arc extinguisher can control the turn-on or turn-off sequence of the main switch and each auxiliary switch. When the power supply isdisconnected, each arc-extinguishing branch realizes the step release of the electric field energy at the switch contact, weakens the current surge and avoids the arc starting.

Description

technical field [0001] The invention belongs to the technical field of emergency protection circuit devices, and in particular relates to a stepped wave cutting arc extinguishing method and an arc extinguisher. Background technique [0002] In daily production and life, switching electrical appliances basically complete the power switch in an instant, and a large part of them are high-voltage electrical appliances. These electrical appliances usually use switches such as relays to control the on-off of their power supply lines. Due to the existence of current, the contacts of the switch are prone to arcing and thermal deformation during the disconnection process, resulting in poor contact, affecting its service life, and even causing fire. [0003] In order to reduce the phenomenon of arcing, people invented the arc chute. When an arc is generated between the contacts, the arc is pulled into the arc chute under the contraction force of the magnetic force line, and the grid o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H01H9/30
CPCH02H9/02H01H9/30
Inventor 李振奎李圆
Owner 李振奎
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