Circuit breaker equipped with permanent magnetic mechanism and speed control device and method for circuit breaker

Abstract

The invention provides a circuit breaker equipped with a permanent magnetic mechanism and a speed control device and method for the circuit breaker. The device comprises a permanent magnetic control module, a signal acquisition module and a high-speed digital processing module, wherein the signal acquisition module is used for acquiring a load state parameter of the circuit breaker; the high-speed digital processing module is used for looking up mechanical properties of the circuit breaker equipped with the permanent magnetic mechanism at that time according to a known corresponding relation table of a load state and the mechanical properties of the circuit breaker equipped with the permanent magnetic mechanism and adjusting and inputting a duty ratio of a PWM (pulse width modulation) wave of the circuit breaker equipped with the permanent magnetic mechanism; the permanent magnetic control module is used for controlling the opening / closing speed of the to-be-controlled circuit breaker equipped with the permanent magnetic mechanism according to the PWM wave subjected to duty ratio adjustment. Reasonable control on the opening / closing speed of the circuit breaker equipped with the permanent magnetic mechanism can be intelligently and reasonably realized, so that the influence of impact of the circuit breaker equipped with the permanent magnetic mechanism on service life of the circuit breaker equipped with the permanent magnetic mechanism is avoided and the mechanical life of the circuit breaker equipped with the permanent magnetic mechanism is prolonged.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a circuit breaker equipped with a permanent magnet mechanism and a speed regulation control device and method thereof. Background technique [0002] The circuit breaker with permanent magnet mechanism is a new type of operating mechanism vacuum circuit breaker that has gradually emerged in recent years. The characteristics of its permanent magnet mechanism are: driven by electromagnetic force and maintained by permanent magnetic force; Stable characteristics, strong expansibility, easy to realize the miniaturization and intelligentization of switchgear, so it is favored by scientific research institutes and manufacturing units, and it is one of the development trends of vacuum circuit breakers; during the closing operation of vacuum circuit breakers, The permanent magnet mechanism has a good force-closing stroke characteristic, which is very close to the closing operation r...

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to solve the problem that the closing / opening speed of the existing circuit breaker cannot be intelligently controlled, which seriously reduces the mechanical life of the circuit breaker, and provide a method that can realize the intelligent control of the closing / opening speed of the circuit breaker and prolong the mechanical life of the circuit breaker. Circuit breaker with permanent magnet mechanism and its speed regulation control device and method for long life

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