Torque Equation to Predict Torque Harmonic Characteristic of IPMSM According to Winding Arrangement, Number of Phases, and Pole-Slot Combination

This paper presents a novel torque equation to predict the harmonic characteristic of an interior permanent-magnet synchronous motor (IPMSM). The procedure for establishing proposed is as follows. First, we classify origins torque, phase, and slot harmonics. harmonics are then analyzed study relationship between generated in N S poles magnet. Second, establish consisting two terms phase In particular, part embodies new concept, namely number coil groups per wound adjacent slots express period stator magneto-motive force. Based on analysis results, applied IPMSM verify whether can consider three cases: winding arrangement, slot–pole combination, phases. aid initial design focusing low ripple characteristic.