Analysis of vibration of permanent magnet synchronous motor with distributed winding for the PWM method of voltage source inverters

This paper presents an evaluation of noise and vibration in a distributed winding permanent magnet synchronous motor driven by voltage source pulse width modulation (PWM) inverters. The permanent magnet synchronous motor (PMSM) is widely used as an important driving source in a variety of fields. However, it generates electromagnetic noise and vibration because of PWM inverters. This paper describes the frequency of the electromagnetic noise caused by a distributed winding PMSM. We investigated the electromagnetic force generating the noise by using a couple of analyses between a circuit simulator and a two-dimensional finite element analysis (2-D FEM). It is found that the electromagnetic noise and vibration results from an electromagnetic force spaced at the 0th order of space harmonics. In addition, the electromagnetic noise and vibration mode of this element are demonstrated in the experiment.