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The present paper presents an analysis regarding the influence of the form and arrangement of permanent magnets on the value of the cogging torque for a surface permanent magnet synchronous motor, designed for the direct drive of the wheels of a vehicle. There are taken into consideration influences caused by: the constructive form of the magnets, the ratio between the pole-arc and the pole-pitch,...
The paper presents a FEM numerical model of a permanent magnet synchronous motor used in electrical vehicles. The motor is mounted directly on the vehicle wheel and has 2p=28 poles, Z=21 slots. The stator winding is made of field coils wound around each tooth. This configuration allows obtaining high torques at low speeds, reduced motor size, high efficiency, short end coils, high slot fill factor...
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