A monostable permanent magnet actuator

Abstract

A monostable permanent magnet actuator comprises a movable iron core assembly, an opening coil, a permanent magnet and a static iron core assembly, wherein the movable iron core assembly comprises a movable iron core and a driving rod, and the driving rod is fixed on the movable iron core; the static iron core assembly comprises an inner static iron core, an outer static iron core and a mechanismfixing plate, wherein the inner static iron core and the outer static iron core are fixed on the mechanism fixing plate, and the inner static iron core is positioned inside the outer static iron core,the permanent magnet is positioned between the inner static iron core and the outer static iron core, and the opening coil is positioned between the inner static iron core and the outer static iron core; the lower end of the driving rod passes through the inner static iron core, the opening spring is put on the driving rod, the upper end of the opening spring is vertically pressed against the movable iron core, the lower end of the opening spring is vertically pressed against the inner static iron core, the opening spring comprises an inner spring and an outer spring, the inner spring is arranged in the outer spring, and the inner spring is opposite to the outer spring in rotation direction. The mechanism has the advantages of simple structure, high reliability, fast opening speed, low energy consumption and zero maintenance.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a monostable permanent magnet operating mechanism of the circuit breaker. Background technique [0002] At present, in the field of power system power distribution, the operating mechanism of the circuit breaker usually has three types: electromagnetic type, spring type and permanent magnet type. In comparison, the permanent magnet operating mechanism has the advantages of simple structure, few parts, long life and frequent operation. The permanent magnet operating mechanism is divided into two types: bistable and monostable. Among them, the monostable permanent magnet operating mechanism is increasingly attracting people's attention due to its high reliability, fast opening speed, low energy consumption, and maintenance-free. focus on. The opening process of the monostable permanent magnet operating mechanism is to pass a reverse current into the coil to offset the holding force of the per...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing monostable permanent magnet operating mechanism, such as complex structure, low reliability, slow opening speed and high energy consumption, the present invention provides a simple structure, high reliability, fast opening speed Fast, low energy consumption, maintenance-free monostable permanent magnet operating mechanism

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