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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.

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