Simulation and experimental analysis of electromagnetic vibration and noise for vehicle permanent magnetic synchronous electrical motors

An electromagnetic vibration and noise simulation method of an 8 poles-48 slots vehicle permanent magnetic synchronous electrical motor were analyzed on wide open throttle (WOT) condition, which was then validated by a bench test in an anechoic chamber. Firstly, an anisotropic material stator core and a stator system model were established, and anisotropic material parameter sensitivity analys is was carried out. Modal results of the stator system were validated by a modal impact test. Secondly, for the 2in1 system including the permanent magnetic synchronous electrical motor and an electrical drive axle, an electromagnetic, structural and acoustic multi-physical coupled model was built. Based on three-dimensional distributed electromagnetic force excitation, electromagnetic noise was predicted on WOT and accelerating condition and electromagnetic noise characteristics were analyzed. Finally, the electromagnetic, structural and acoustic multi-physical coupled model of the permanent magnetic electrical motor was validated by bench test results in the anechoic chamber. The mechanism of the 48th order cut peak level problem at 2 000 r/min was clarified emphatically. The research achievements will contribute to vehicle permanent magnetic synchronous electrical motor design and mechanism analysis of electromagnetic vibration and noise. © 2022, Editorial Office of Journal of Vibration and Shock. All right reserved.