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A non-polar arc extinguishing system for high voltage DC contactor

A high-voltage direct current and contactor technology, applied in the field of arc extinguishing system, can solve the problems of low on-load switching life, waste of installation space, and large device volume, etc., to improve on-load switching life, save installation space, and good arc extinguishing effect Effect

Active Publication Date: 2018-01-02
贵州振华群英电器有限公司(国营第八九一厂)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The arc extinguishing of existing conventional contactors mainly relies on increasing the gap and pressure of the contacts to improve the arc extinguishing ability, and its shortcomings are: (120-900) Vdc, (60-1000) A and above high-power load conditions The arc extinguishing effect is poor, the life of on-load switching is low, and the device is bulky, wasting installation space

Method used

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  • A non-polar arc extinguishing system for high voltage DC contactor
  • A non-polar arc extinguishing system for high voltage DC contactor
  • A non-polar arc extinguishing system for high voltage DC contactor

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Embodiment

[0019] A high-voltage DC contactor non-polar arc extinguishing system, as attached Figure 1-3 As shown, a contact chamber 4 is included, the bottom of the contact chamber 4 is provided with a movable contact 2, and the top is provided with two static contacts 3, and two permanent magnets 1 are respectively arranged in parallel on both sides of the static contact 3. The polarities of the permanent magnets 1 on the same side of a static contact 3 are opposite; wherein the direction of the magnetic field lines between the permanent magnets 1 on both sides of the same static contact 3 is perpendicular to the moving direction of the movable contact 2, and the same static contact 3 The polarities of the permanent magnets 1 on both sides are the same.

[0020] The lower surface of the permanent magnet 1 is lower than the upper surface of the movable contact 2 when the contacts are disconnected, and the upper surface of the permanent magnet 1 is higher than the lower surface of the s...

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Abstract

The invention discloses a non-polarity arc extinguishing system for a high-voltage DC contactor, which comprises a contact chamber (4), a movable contact (2) is arranged at the bottom of the contact chamber (4), and two static contacts are arranged at the top (3), two permanent magnets (1) are arranged in parallel on both sides of the static contact (3), and the polarities of the permanent magnets (1) on the same side of the two static contacts (3) are opposite; The direction of the magnetic force lines between the permanent magnets (1) on both sides of the contact (3) is perpendicular to the moving direction of the movable contact (2), and the polarities of the permanent magnets (1) on both sides of the same static contact (3) are the same. The invention has the beneficial effects of good arc extinguishing effect, high on-load switching life of the contactor, non-polar arc extinguishing, and small volume under the same capacity.

Description

technical field [0001] The invention relates to an arc-extinguishing system of a high-voltage direct-current contactor, in particular to a non-polar arc-extinguishing system of a high-voltage direct-current contactor. Background technique [0002] At present, DC power systems with (120-900) Vdc and (60-1000) A or more are used in electric vehicles, satellites, and space stations to reduce losses and provide higher power. Since DC does not have a zero-crossing point like AC, it cannot be extinguished naturally. Therefore, in the case of limited volume and weight, in order to improve the on-load switching capability of high-voltage DC contactors, it is necessary to solve the arc-extinguishing capability of its contact system. The arc extinguishing of existing conventional contactors mainly relies on increasing the gap and pressure of the contacts to improve the arc extinguishing ability, and its shortcomings are: (120-900) Vdc, (60-1000) A and above high-power load conditions ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/44
CPCH01H9/443
Inventor 肖斌赵瑞平朱正伟王宾文宝珠郑绍信
Owner 贵州振华群英电器有限公司(国营第八九一厂)
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