Abstract
This paper proposes a novel low-cost claw pole permanent magnet motor with soft magnetic composite (SMC) core and ferrite permanent magnet (PM). Since the ferrite PM is much cheaper than the rare earth PMs, the material cost of this motor can be reduced greatly. And the special spoke type rotor can make the ferrite PM produce very high air gap flux density in this motor. By using the SMC material, the claw pole stator and rotor core can be manufactured very easily. A 675 W 1.8 Nm claw pole motor is designed to replace the conventional permanent magnet synchronous motor (PMSM) in a refrigerator compressor. The finite element method (FEM) package ANSOFT and simplified magnetic network method are used to calculate the electromagnetic parameters of this motor. And the equivalent electric circuit is developed to predict the motor performance.
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