TCM monostable permanent magnet mechanism

Abstract

The invention discloses a TCM monostable permanent magnet mechanism, relating to the technical field of medium-voltage vacuum breaker production; two ends of a circular magnetic domain are connected with an upper magnetic domain and a lower magnetic domain respectively; a switching-in screw is penetrated on the upper magnetic domain; an opening screw is penetrated on the lower magnetic domain; an iron core is arranged in the circular magnetic domain; the inner ends of the switching-in screw and the opening screw are connected with the iron core respectively; a coil is arranged between the upper part of the iron core and the circular magnetic domain; an inner ring is arranged between the lower part of the iron core and the circular magnetic domain; a permanent magnet is arranged outside the inner ring; and an aluminum adjusting cushion is arranged on the outer side of the lower end of the iron core. The mechanism disclosed by The invention comprehensively embodies good matching of an operation mechanism of the monostable permanent magnet mechanism and vacuum arc extinguish chamber capacity characteristics and has excellent mechanical characteristics and electric characteristics and can give suitable switching-in speed and opening speed. The mechanism disclosed by The invention is characterized by easy process, few components, high reliability, normally one moving component and little fault source; and mechanical service life can reach to 30000 times to 100000 times easily.

Description

technical field [0001] The invention relates to the technical field of production of medium-voltage vacuum circuit breakers. Background technique [0002] At present, most of the bistable permanent magnet mechanisms are used in the market. When the bistable permanent magnet mechanism is used in conjunction with vacuum circuit breakers, it does not solve the problem of excessive mechanical parts and transmission components of traditional spring-operated circuit breakers. There have also been some problems in practical applications, the main ones being from design flaws. [0003] Its defect is as follows: 1, iron core material needs to use the silicon steel sheet that price is more expensive. Production costs are high. 2. The structure is complex and there are many parts, which cannot completely overcome mechanical failures. 3. The energy consumption of the opening operation is the same as that of the closing operation, both of which are relatively large. 4. The opening op...

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Problems solved by technology

[0003] Its defects are as follows: 1. The iron core material needs to use more expensive silicon steel sheet

high production cost

2. The structure is complex and there are many parts, which cannot completely overcome the mechanical failure

3. The energy consumption of the opening operation is the same as that of the closing operation, both of which are relatively large

4. The opening operation and closing operation and maintenance all rely on permanent magnetic force, which is difficult to solve the problem of saddle-shaped opening speed; it does not match the load characteristics of the vacuum switch

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