Design optimization for cogging torque minimization and efficiency maximization of a high-speed PM motor

This paper presents a 3-phase, 400 W, 14000 rpm, 2-pole/3-slot non-overlapping windings PM motor. In the design of the motor, Taguchi parameter method coupled with the finite element method (FEM) analysis is employed to minimize the level of cogging torque and maximize the efficiency of the motor. A mechanical analysis is carried out to investigate the mechanical feasibility of the rotor due to high-speed rotation, and a thermal analysis is conducted to obtain the temperature distributions within the motor. Test results from a prototype motor demonstrate that the motor is favorable regarding cogging torque minimization and efficiency maximization.