A Novel Application of Harmonics Spread Spectrum Technique for Acoustic Noise and Vibration Reduction of PMSM Drive

Rajesh M. Pindoriya,Rajeev Kumar,Bharat Singh Rajpurohit

doi:10.1109/access.2020.2999336

Abstract

This paper presents experimental investigation study of Acoustic Noise and Vibration (ANV) reduction in Permanent Magnet Synchronous Motor (PMSM) drives with a novel application of `harmonics spread spectrum technique'. In order to reduce the ANV of PMSM drives, the Random Pulse Width Modulation (RPWM) method is applied which distributes the power of harmonic noise in a wide range of discrete frequency spectrum. Furthermore, in-depth theoretical analysis is presented about the way RPWM improves torque ripples, vibration and acoustic noise in PMSM drives. The theoretical and experimental results obtained are used to draw the operational concept of the power electronics converters to reduce ANV; which is produced by PMSM drive. Time and frequency-domain analysis are carried out to examine the effects of change in the operating parameters such as pulse-width, etc. of the power electronics converters on the ANV. A small-scale laboratory set-up was developed for PMSM drive with low cost acoustic chamber for experimental investigations. Experimental results show significant reduction in ANV and torque ripples of the PMSM drive with the application of RPWM technique.

Highlights

The Permanent Magnet Synchronous Motors (PMSM) are the most promising drives in the industries
An extensive study of application of Random Pulse Width Modulation (RPWM) techniques, ‘random pulse position’, for PMSM based drive for reduction of Acoustic Noise and Vibration (ANV) seems absent from the reported literature
Since the torque harmonics/ripples are function of stator current time-harmonics/ripples which in turn contributes to production of ANV in PMSM. It is possible by employing spread spectrum RPWM technique, to spread out the frequency spectrum of the harmonic voltage, and current, towards higher order in such a way as to significantly damp lower order current time harmonics magnitude for torque ripple minimization

Summary

INTRODUCTION

The Permanent Magnet Synchronous Motors (PMSM) are the most promising drives in the industries. Pindoriya et al [13] in 2019 has presented that how power electronic converters inject harmonics and produce electromagnetic forces that produce ANV in PMSM drive and noise is radiated from motor structure to its surrounding. An extensive study of application of Random Pulse Width Modulation (RPWM) techniques, ‘random pulse position’, for PMSM based drive for reduction of Acoustic Noise and Vibration (ANV) seems absent from the reported literature. In this present paper, a novel control approach based on random PWM technique i.e. random pulse position has been discussed and implemented experimentally to validate its effectiveness in order to reduce the ANV in PMSM drive. Section-V presents the detailed simulation and experimental investigation of the PMSM drive for ANV reduction

SOURCES OF ACOUSTIC NOISE AND VIBRATION IN ELECTRIC DRIVES

SIMULATION AND EXPERIMENTAL INVESTIGATIONS

Findings

CONCLUSIONS