Title :
Minimization of acoustic noise in variable speed induction motors using a modified PWM drive
Author :
Garcia-Otero, Singli ; Devaney, Michael
Author_Institution :
Coop. Dev. Energy Program, Fort Valley State College, Fort Valley, GA, USA
Abstract :
This paper describes an effective way of reducing acoustic noise in a motor supplied from an adjustable speed PWM drive. The PWM patterns are selected to eliminate the most acoustically sensitive harmonics in the motor´s vibration spectra. This permits the PWM drive to use more economical yet slower switching devices while maintaining quiet operation. This method is applicable to both voltage source and current source inverters since the current waveform is used as the basis for eliminating the objectionable harmonics
Keywords :
acoustic noise; harmonics; induction motors; invertors; noise abatement; pulse width modulation; variable speed drives; PWM patterns; acoustic noise minimisation; acoustically sensitive harmonics; current source inverters; current waveform; modified PWM drive; variable speed induction motors; vibration spectra; voltage source inverters; Acoustic noise; Bridge circuits; Induction motors; Power electronics; Pulse width modulation; Pulse width modulation inverters; Semiconductor device noise; Switching circuits; Switching frequency; Vibrations;
Journal_Title :
Industry Applications, IEEE Transactions on
