A Study on Reduction of Vibration Based on Decreased Cogging Torque for Interior Type Permanent Magnet Motor

This paper presents a reduction method of vibration based on decreased cogging torque for interior type permanent magnet motor. The vibration source which affects biggest in the vibration of the interior type permanent magnet motor is the force, cogging torque, of the radius direction in compliance with a magnetic energy from between stator and the rotor. The notch is established in the rotor because notch could be applied most easily to the interior type permanent magnet motor and maximizes a reduction effect of cogging torque. The prototype machine was produced to estimate the vibration reduction by decreasing the cogging torque. The measured result is estimated among several frequencies.