Research on Electromagnetic Vibration and Noise Suppression of PMaSynRM with Slotted Stator and Rotor

Permanent magnet assisted synchronous reluctance motor (PMaSynRM) has been widely concerned, but the research on the vibration and noise of this kind of motor is relatively limited. In addressing the problem of significant vibration noise caused by radial electromagnetic force waves in PMaSynRM, the research explored a motor vibration and noise suppression solution involving stator slotting and rotor magnetic isolation hole opening. The study analyzed the impact of different slotting parameters on the radial electromagnetic force and air gap magnetic flux density of the motor and compared it with the solution involving slotting of the stator teeth only and magnetic isolation hole opening of the rotor only. Finally, the modal, vibration response, and noise response of the motor after slotting are analyzed and verified. The results show that the amplitude of radial electromagnetic force and the total harmonic distortion rate of the air gap magnetic flux density of the motor are significantly reduced by opening the stator auxiliary slot and rotor magnetic isolation hole. The maximum vibration acceleration of the motor is reduced by 33.44 mm/s2, and the peak A-weighted sound pressure level of the motor decreases by 5.68 dBA. © 2024, Electromagnetics Academy. All rights reserved.