Reduction of audible switching noise in induction motor drives using random position space vector PWM

Author

Na, S.-H. ; Jung, Y.G. ; Lim, Y.-C. ; Yang, S.H.

Author_Institution

Dept. of Electr. Eng., Chonnam Nat. Univ., Kwangju, South Korea

Volume

149

Issue

3

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

195

Lastpage

200

Abstract

Random pulse width modulation (RPWM) is a switching technique used to spread voltage and current harmonics over a wide frequency range. By using a randomly changing inverter switching frequency, the power spectrum of the electromagnetic acoustic noise can be spread to the wideband area. Wideband noise is much more comfortable and less annoying than narrowband noise. Thus, RPWM has been attracting interest as a method for the reduction of acoustic noise in inverter drive systems. A new RPPWM (random position space vector PWM) is proposed and implemented. Each of three phase pulses is located randomly in each switching interval. Along with randomisation of the PWM pulses, space vector modulation is also executed in a C167 microcontroller. Simulation and experimental results show that the voltage and current harmonics are spread to the wideband area and that the audible switching noise is reduced by using the proposed RPPWM method

Keywords

PWM invertors; acoustic noise; induction motor drives; microcontrollers; noise abatement; power conversion harmonics; switching circuits; C167 microcontroller; PWM pulses randomisation; audible switching noise reduction; current harmonics; electromagnetic acoustic noise; induction motor drives; power spectrum; random position space vector PWM; randomly changing inverter switching frequency; space vector modulation; switching technique; voltage harmonics; wide frequency range; wideband area;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20020244

Filename

1006957