Abstract

A multi-physical parametric model of the induction machine and its pulse width modulation (PWM) supply was developed in order to predict its sound power level of electromagnetic origin at variable speed and load, and perform optimal design search including noise minimization. The electromagnetic model calculates the stator phase currents by the aid of a Simulink® PWM model and a multilayer single-phase equivalent circuit; it computes the air-gap radial flux density which is supposed to be the only source of acoustic noise. The mechanical and acoustic parts are based on a 2D cylindrical shell stator model. This paper presents some variable-speed simulations of a squirrel-cage traction machine, and demonstrates the ability of the simulation tool to investigate the role of harmonics in noise generation. Then, the possibility to use the Design of Experiments (DoE) method in order to find the leading variables on noise at variable speed is discussed. Finally, some PWM simulation results are presented and interpreted on the base of theoretical results.

Preprint and full paper

The pre-print can be downloaded here:

A fast noise predictive multiphysical model of the PWM controlled induction machine

Notes