Title: Integrated platform for motor stator sound power determination

Authors: John G. Cherng; Wenchen Huang; Zhengxiong Wang; Peiran Ding

Addresses: Mechanical Engineering Department, University of Michigan-Dearborn, 4901 Evergreen Road, Dearborn, MI 48128, USA ' Mechanical Engineering Department, University of Michigan-Dearborn, 4901 Evergreen Road, Dearborn, MI 48128, USA ' Mechanical Engineering Department, University of Michigan-Dearborn, 4901 Evergreen Road, Dearborn, MI 48128, USA ' ANSYS, Inc., Atrium One, Suite 350, 900 Victors Way, Ann Arbor, MI 48108, USA

Abstract: This paper presents a unique approach for integrating the electromagnetic forces of a motor with the sound pressure level radiated from its stator frame. In addition, the effects of the inverter's pulse-width modulation (PWM) carrier frequency on the level of radiated noise are analysed. Four ANSYS modules, namely, Simplorer, Maxwell, Mechanical, and Acoustics, are used to develop the control circuit, to calculate the electromagnetic forces of the motor, to simulate the mechanical structure of the stator frame, and, finally, to predict the radiated noise. A Prius 2004 internal permanent magnet motor was selected for the study due to the availability of this motor's design details. An optimum PWM frequency was identified and a trap filter was designed for the noise reduction. A simple experiment setup was built to validate the correlation of the PWM switching frequency with the motor's radiated noise.

Keywords: PWM frequency; pulse width modulation; harmonics; motor noise; ANSYS; hybrid vehicles; Toyota Prius 2004; PMSM; permanent magnet synchronous motor; motor stator sound power; hybrid electric vehicles; HEVs; electromagnetic forces; sound pressure levels; simulation; trap filter; noise reduction; vehicle noise.

DOI: 10.1504/IJVP.2016.078559

International Journal of Vehicle Performance, 2016 Vol.2 No.3, pp.253 - 274

Received: 30 Aug 2015
Accepted: 29 Mar 2016

Published online: 17 Aug 2016 *

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