Abstract

Permanent magnet (PM) synchronous motors for automotive applications commonly use sintered rare- earth magnets in order to produce high power density and high efficiency. However, such magnets have the disadvantages of high cost and instability of the raw materials, which should be reduced. As one possible solution to this problem, this paper examined PM-assisted synchronous reluctance motors (PMASynRMs) with Dy- free bonded magnets. By using the high design flexibility of bonded magnets, the maximum torque and power of the proposed PMASynRM were higher than those of the conventional interior PM synchronous motor with sintered rare-earth magnets.

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