Development of an Circuit Breaker System Using a Linear Motor with Opposite Magnetic Poles

The high-thrust linear motor with a lightweight and high-strength mover was developed for operating circuit breakers. The linear motor is composed of a lightweight mover that has permanent magnets sandwiched between magnetic poles and an armature with a three-dimensional magnetic circuit. The specif...

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Bibliographic Details
Published in:Denki Gakkai ronbunshi. D, Sangyō ōyō bumonshi 2022/03/01, Vol.142(3), pp.214-221
Main Authors: Aoyama, Yasuaki, Hasegawa, Yu, Shiraishi, Katsuhiko, Hashimoto, Hiroaki, Urai, Hajime, Ebisawa, Daisuke
Format: Article
Language:Japanese
Subjects:
circuit breaker
Circuit breakers
Circuit design
direct drive
Electric motors
electrification
high response operation
high thrust drive
Lightweight
linear motor
Machine shops
Magnetic circuits
Magnetic poles
Permanent magnets
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Summary:The high-thrust linear motor with a lightweight and high-strength mover was developed for operating circuit breakers. The linear motor is composed of a lightweight mover that has permanent magnets sandwiched between magnetic poles and an armature with a three-dimensional magnetic circuit. The specifications and performance of the linear motor were determined to cut off current soundly. Then, a prototype of a fully electrically operated breaker using linear motor was investigated. The linear-motor-based operating mechanism designed for the circuit breaker reached the open-pole position in 13.2ms from the start of movement. However, the time from opening to 0.5 cycle was 9.0ms. In addition, the variation in breaking operation time was within 1ms, which was expected that stable controlled operation.
ISSN:0913-6339
2187-1094
1348-8163
2187-1108
DOI:10.1541/ieejias.142.214