Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

A New Space Vector Random PWM Scheme for Induction Motor Drives

  • Kim Hoe-Geun (Dept. of Electrical Engrg. (RRC-HECS) Chonnam National University) ;
  • Na Seok-Hwan (Dept. of Electrical Engrg. (RRC-HECS) Chonnam National University) ;
  • Lim Young-Cheol (Dept. of Electrical Engrg. (RRC-HECS) Chonnam National University) ;
  • Jung Young-Gook (Dept. of Electrical Engrg. Daebul University)
  • Published : 2001.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

The RPWM (Random· Pulse Width Modulation) is a switching technique to spread the voltage and current harmonics over a wide frequency area. By using randomly changing switching frequency of the inverter, the power spectrum of the electromagnetic acoustic noise can be spread to the wide-band area. The wide­band noise is much more comfortable and less annoying than the narrow-band one. So, the RPWM has been attracting interest as an excellent method for the reduction of acoustic noise on the inverter drive system. In this paper 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 the randomization of PWM pulses, the space vector modulation is also executed in the C167 micro-controller. The experimental results show that the voltage and current harmonics are spread to a wide band area and that the audible switching noise is reduced by the proposed RPPWM method.

Keywords