A permanent magnet mechanism with adjustable closing and opening time and its adjustment method

Abstract

The invention belongs to the technical field of electrical switches, and relates to a permanent magnetic mechanism capable of adjusting the switching on-off time and an adjusting method thereof. The permanent magnetic mechanism comprises a permanent magnetic mechanism, and an outer yoke, an upper yoke, a lower yoke, a moving core, a core back cover, a pull rod, a switching-off spring, a contact spring, an adjusting nut, a locking nut, an inner yoke, a coil, and a permanent magnet, all of which are arranged inside the permanent magnetic mechanism. The outer yoke is arranged at the outer side of the permanent magnetic mechanism, the upper yoke and the lower yoke are fixedly installed at the upper and lower ends of the outer yoke, the switching-off spring is arranged in a cavity formed by the moving core, the core back cover and the upper yoke, and the contact spring is arranged between the lower end of a stepped circle at the upper end of the pull rod and the core back cover. By adopting the permanent magnetic mechanism of the invention, the switching on-off time can be adjusted, the time of tripping protection can be effectively shortened, and the quickness of line quick-break protection is ensured. The permanent magnetic mechanism and the adjusting method are especially suitable for a circuit break of which both the switching-off spring and the contact spring participate in the switching-on / off process and which is equipped with multiple permanent magnetic mechanisms, and are applicable to the field of electric power.

Description

technical field [0001] The invention belongs to the technical field of electrical switches, and is particularly designed to a permanent magnet mechanism capable of adjusting closing and opening time. Background technique [0002] In the field of intelligent distribution network, fast protection circuit breakers are widely used. The reason is that the distribution network line can be segmented and demarcated, and the power failure range can be controlled to a minimum by relying on the coordination of protection time steps in the event of a fault. The faulty circuit breaker can quickly isolate the faulty area, shorten the fault finding time, reduce the power failure radius, and quickly restore the normal power supply in the non-faulty area. It is of great significance to build a self-healing automation system network. However, all of this depends on the accurate judgment of the circuit breaker protection system and the reliable snap-action performance of the circuit breaker op...

AI Technical Summary

Problems solved by technology

This method can change the closing and opening time within a certain range and realize the synchronism of the circuit breaker, but it has certain limitations.

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