The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
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A New Three-Phase Lead-Lag Random Pulse Position PWM Scheme for Decreasing Audible Acoustic Noise of Motor Drives

모터 구동 장치의 가청 소음 저감을 위한 새로운 3상 Lead-Lag 랜덤 펄스 위치 PWM 기법

  • 위석오 (전남대 공대 전기공학과) ;
  • 정영국 (대불대 공대 전기공학과 박사과정.) ;
  • 임영철 (전남대 공대 전기공학과.) ;
  • 나석환 ((주)하우 무선데이터통신)
  • Published : 2002.07.01
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Abstract

In this paper, a new Three-Phase Lead-Lag Random Pulse Position PWM(LL-RPWM) scheme is proposed and implemented for decreasing audible acoustic noise of motor drives. In the proposed RPWM(Random PWM), each of three phase pulses is located randomly in each switching interval. Based on the space vector modulation technique, the duty ratio of the pulses is calculated. Along with the randomization of the PWM pulses, we can obtain the effects of spread spectra of voltage, current as in the case of randomly changed switching frequency. To verify the validity of the proposed LL-RPWM, the simulation and experimental study was tried. Along with the randomization PWM pulses, the space vector modulation is also executed in the C167 micro-controller. The simulation and experimental results show that the voltage and current harmonics are spread to a wide band area and that the audible acoustic noise is reduced by the proposed RPWM method.

Keywords

References

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