Electromagnetics, Structural Harmonics and Acoustics Coupled Simulation on the Stator of an Electric Motor

Abstract

Electric motors and generators produce vibrations and noise associated with many physical mechanisms. In this study, we look at the vibrations and noise produced by the transient electromagnetic forces on the stator of a permanent magnet motor. In the first stage, electromagnetic simulation is carried out to calculate the forces per tooth segment of the stator. The harmonic orders of the electromagnetic forces are then calculated using Fourier analysis, and forces are mapped to the mechanical harmonic analysis of the second stage. As a third stage, the vibrations of the structure are used to drive the boundary of acoustic domain to predict the noise. Finally, optimization studies are made over the complete system to improve the motor design and reduce noise. A simulation environment (ANSYS Workbench) is used to integrate a seamless workflow.

Magnetic Vibration in Induction Motor Caused by Supply Voltage Distortion

“…Magnetic vibration is a problem for almost all medium-and high-power electric motors [1][2][3][4][5]. It causes adverse events: a change in the harmonic composition of the supply current [6,7], bearing wear [8], acoustic noise [9,10], an increase in power consumption [11,12] and the destruction of electric motors [13,14]. This problem occurs in the electric drive [15,16] and generators, including wind turbines [17,18].…”

Thermal and Mechanical Analysis of a 72/48 Switched Reluctance Motor for Low-Speed Direct-Drive Mining Applications

“…The calculation of motor natural frequencies is necessary for the vibration of SRM [17]. Using a simulation environment ANSYS-Workbench, the acoustic noise and vibration created by the transient electromagnetic forces on the stator of an electric machine were presented previously [28]. However, the water jacket (WJ) optimization design has not been intensely studied and requires further research [2].…”