A permanent magnet motor capable of pole changing for variable speed drive

Abstract

For reduction of energy consumption, we developed a technique that varies the number of magnetic poles in a permanent-magnet (PM) motor in accordance with speed. In this paper, we propose a novel PM motor that can change the number of magnetic poles and produce two types of torque. When the motor operates with 8 poles, it produces a PM torque at low speeds… (More)

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