Multi-physics modeling and optimization of a multi-V-shape IPM with concentrated winding

Abstract : In this paper a coupled multi-physics model is proposed for a multi-V-shape Interior Permanent Magnet (IPM) motor with concentrated winding. A non-linear magnetic model computes the flux density in the stator and the rotor and delivers the torque, the internal power factor and the internal voltage. It is coupled with an electrical model that computes the power factor and the voltage at the motor terminals by considering the resistance and the leakage inductance. A loss model is developed in order to calculate the copper and the iron losses. They are used as inputs to a thermal model that computes the temperature of the motor. Finally, a multi-objective optimization is carried out in order to design the motor for a high torque and low speed application.