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Contacts with cathode spot trap structure contact pieces, DC vacuum arc extinguisher and DC vacuum contactor

A vacuum interrupter and cathode spot technology, which is applied to high-voltage air circuit breakers, high-voltage/high-current switches, electrical components, etc., can solve the problems of not realizing direct current breaking of vacuum circuit breakers, so as to promote wide application, Increase the vacuum arc voltage and promote the effect of extinguishing

Active Publication Date: 2020-04-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing vacuum circuit breakers are mainly used in AC current loop systems. In addition, vacuum switches also have certain applications in the topological structure of DC current breaking. However, the direct breaking of DC current by vacuum circuit breakers has not yet been realized.

Method used

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  • Contacts with cathode spot trap structure contact pieces, DC vacuum arc extinguisher and DC vacuum contactor
  • Contacts with cathode spot trap structure contact pieces, DC vacuum arc extinguisher and DC vacuum contactor
  • Contacts with cathode spot trap structure contact pieces, DC vacuum arc extinguisher and DC vacuum contactor

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] figure 1 with figure 2 They are respectively a schematic diagram and an axial sectional view of a contact sheet with a cathode spot trap structure of the present invention. Such as figure 1 with figure 2As shown, the present invention has a contact sheet with a cathode spot trap structure, including a static side contact combination structure 201 and a moving side contact combination structure 202; the static side contact combination structure 201 includes a static side conductive rod (101), the static side contact structure (102) welded on one end of the static side conductive rod (101), and the static side contact piece with the cathode spot trap structure welded on the end of the static side contact structure (102) (103); the moving side contact combination structure 202 includes a moving side conductive rod (106), a m...

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Abstract

The invention discloses a contact with a contact piece of a cathode spot trap structure, a direct-current vacuum arc-extinguishing chamber and a direct-current vacuum contactor. The contact comprisesa moving-side contact combination structure and a static-side contact combination structure. The moving-side contact combination structure is welded at one end of a moving-side conducting rod. A moving-side contact piece is welded at the end part of the moving-side contact structure. The static-side contact combination structure comprises a static-side contact structure welded at one end of a static side conducting rod and a static-side contact piece welded at the end part of the static-side contact structure. Cathode spot trap structures are respectively arranged on the moving-side contact piece and the static-side contact piece. Each cathode spot trap structure is provided with a plurality of open pores in an annular contact piece. Through the arrangement of the cathode spot trap structures, the fluctuation of cathode spots on the surface of the contact piece is facilitated. The extinguishing of cathode spots is accelerated, and the vacuum arc voltage is effectively improved. The invention also provides the direct-current vacuum arc-extinguishing chamber and the direct-current vacuum contactor provided with the contact piece of the cathode spot trap structure.

Description

technical field [0001] The invention belongs to the technical field of vacuum circuit breakers and vacuum direct current breaking, and in particular relates to a contact with a contact piece of a cathode spot trap structure, a direct current vacuum interrupter and a direct current vacuum contactor. Background technique [0002] With the rapid development of related research and application in the field of direct current at home and abroad, there is a huge market demand for medium and low voltage direct current circuit breakers. Compared with AC power supply systems, DC transmission technology has unique technical advantages in the field of large-capacity, long-distance power transmission and distribution. Although the theory of DC transmission is relatively mature, compared with the flexible and diverse methods of AC transmission system, the development of DC transmission technology has been greatly limited and restricted. The main reason is the lack of practical, convenient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/664
CPCH01H33/664H01H33/6642
Inventor 马慧刘志远耿英三王建华孙丽琼王静怡胡飞良
Owner XI AN JIAOTONG UNIV
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