CN201256121Y

CN201256121Y - Permanent magnet mechanism for large capacity vacuum circuit breaker

Info

Publication number: CN201256121Y
Application number: CNU2008200299437U
Authority: CN
Inventors: 田利民
Original assignee: 田利民
Current assignee: XINJIANG MME ELECTRIC HOLDINGS CO., LTD.
Priority date: 2008-08-02
Filing date: 2008-08-02
Publication date: 2009-06-10
Anticipated expiration: 2018-08-02

Abstract

A permanent magnet structure for high-capacity vacuum circuit breakers comprises a magnetic yoke, a coil, a movable iron core and a permanent magnet, wherein the magnetic yoke is a metal frame used as a framework of the overall permanent magnet structure, the coil is fixed in the magnetic yoke frame, the movable iron core is arranged in the middle of the coil, two ends of the movable iron core are mounted at two ends of the magnetic yoke, and the permanent magnet is fixed at an end portion of the magnetic yoke or the movable iron core. The utility model has the advantages of greatly increasing brake breaking speed of vacuum circuit beakers through the method, and further solving the problem of low brake breaking speed of the permanent magnet structure in high-capacity vacuum circuit breakers.

Description

The large-capacity vacuum circuit breaker permanent magnet mechanism

Technical field

The utility model belongs to technical field of electricity, particularly the permanent magnet mechanism in the high-voltage switch gear.

Background technology

In recent years, the used for high-voltage switch permanent magnet mechanism receives much concern, but because the influence of itself structure can't reach the desired desirable opening velocity of vacuum interrupter, has influenced its application of cut-offfing at big capacity.The tradition permanent magnet mechanism is divided into bistable state and monostable (is seen Fig. 1 a; 1b).No matter bistable state and monostable, permanent magnet 4 all is at moving iron core 3 middle parts, coil 2 is positioned at moving iron core 3 ends.Permanent magnet is for closing the total body in branch position in the bistable operation principle, and permanent magnet is connected in the magnetic loop during combined floodgate.Owing to the effect of combined floodgate magnetic loop, stoped the iron core movement velocity that movement velocity is reduced during separating brake.Otherwise close a floodgate.

Summary of the invention

The utility model purpose provides a kind of large-capacity vacuum circuit breaker permanent magnet mechanism, to improve permanent magnet mechanism divide-shut brake speed, solves the big capacity of vacuum circuit-breaker and cut-offs problem.

Technical solutions of the utility model are: the large-capacity vacuum circuit breaker permanent magnet mechanism, comprise yoke, coil, moving iron core and permanent magnet, yoke is a metal framework and as the support body of whole permanent magnet mechanism, coil stationary is in the yoke framework, moving iron core is positioned in the middle of the coil and two ends are installed in the yoke two ends, and the permanent magnet of the utility model permanent magnet mechanism is fixed on the end of yoke end or moving iron core.

The equal fixed permanent magnet of an end fixed permanent magnet or two ends at yoke or moving iron core.

The fixed form of permanent magnet can take following any one:

Permanent magnet is fixedly connected on the end face of moving iron core;

Permanent magnet is embedded in the end of yoke.

The utility model advantage is to improve the opening velocity of vacuum circuit-breaker greatly by the method, solves the low problem of permanent magnet mechanism opening velocity in large-capacity vacuum circuit breaker.It is more extensive that permanent magnet mechanism is used, and the exploitation manufacturing of China's vacuum circuit-breaker permanent magnet mechanism is taken its place in the front ranks of the world.

Description of drawings

Fig. 1 is existing permanent magnet mechanism schematic diagram, and wherein Fig. 1 (a) is a bistable structure; Fig. 1 (b) is a monostable configuration.

Fig. 2 adds the magnetic loop schematic diagram for the utility model permanent magnet mechanism at moving iron core, and wherein Fig. 2 (a) is a bistable structure; Fig. 2 (b) is a monostable configuration.

Fig. 3 adds the magnetic loop schematic diagram for the utility model permanent magnet mechanism at static iron core (yoke), and wherein Fig. 3 (a) is a bistable structure; Fig. 3 (b) is a monostable configuration.

Embodiment

Embodiment 1: shown in Fig. 2 (a) and Fig. 2 (b), and no matter bistable state or monostable configuration, permanent magnet 4 is fixed on moving iron core 3 ends, and coil 2 is positioned at moving iron core 3 ends and together is installed in yoke (1).

Embodiment 2: shown in Fig. 3 (a) and Fig. 3 (b), and no matter bistable state or monostable configuration, permanent magnet 4 is fixed on yoke 1 (static iron core) end (one or both ends are all fixed), and coil 2 is positioned at moving iron core 3 ends and together is installed in yoke (1).

Claims

1, large-capacity vacuum circuit breaker permanent magnet mechanism, comprise yoke (1), coil (2), moving iron core (3) and permanent magnet (4), yoke (1) is a metal framework and as the support body of whole permanent magnet mechanism, coil (2) is fixed in yoke (1) framework, moving iron core (3) is positioned in the middle of the coil (2) and two ends are installed in yoke (1) two ends, it is characterized in that permanent magnet (4) is fixed on the end of yoke (1) end or moving iron core (3).

2, permanent magnet mechanism according to claim 1 is characterized in that the equal fixed permanent magnet of end fixed permanent magnet (4) or two ends (4) at yoke (1) or moving iron core (3).

3, permanent magnet mechanism according to claim 2 is characterized in that permanent magnet (4) is to be fixedly connected on the end face of moving iron core (3).

4, permanent magnet mechanism according to claim 2 is characterized in that permanent magnet (4) is the end that is embedded in yoke (1).