Effect of stator design parameters on PMSM vibration

Abstract

Environmental pollution, fossil fuel depletion, and global warming are some of the problems with conventional internal combustion engines that have sparked interest in electric vehicles. Traction source for electric vehicles is the electric motor. An electric vehicle can employ a variety of electric motors. Permanent magnet synchronous motors (PMSM) are commonly utilized in electric vehicles because of their high-power density, high efficiency, and low vibration and noise with high performance. Electric motor is one of the major contributors to vibration and noise in electric vehicles. Apart from the low-frequency noise produced by the conventional internal combustion engines, the electric motor produces high-frequency noise. Because the human ear is extremely sensitive in this frequency range, a severe noise sensation may result. Hence it is crucial to control vibration and noise in electric motor. Since noise is produced by vibrating surfaces, the vibration characteristics of the PMSM deserves attention. The goal of our project is to study different vibration mechanisms and solutions available in the literature for vibration control. Investigating the effect of stator design parameters on PMSM vibration is the main objective of our work. The parameters slot height and slot opening width are chosen for investigation in this work. To investigate the influence of slot height and slot opening width, three stator models with varying values of slot height and three stator models with varying values of slot opening width were built. Vibration analysis was performed on all models. The vibration analysis results of each model were compared to determine the effect of a design parameter on vibration. Keywords: Vibration and Noise, PMSM, Slot height, Slot opening width, Vibration analysis.