Comparison of torque ripple due to difference of embedded form of magnets

Abstract

　In recent years, the shift from gasoline cars to electric vehicles is accelerating. As a motor mounted in a car, can be interior permanent magnet types synchronous motor (IPMSM) miniaturized and has high output, so it is commonly used. However, there is a weak point that torque ripple is larger than other motors. This will cause deterioration of the comfort of the car. Therefore, I aimed to reduce the torque ripple without lowering the torque by optimizing the rotor shape of the motor using electromagnetic field analysis.