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

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Compensation of Effects of DC-Link Ripple Voltages on Output Voltage of Two-Leg Three-Phase PWM Inverters

2-레그 3상 PWM 인버터의 출력전압에서 직류링크 리플전압의 영향 보상

  • 김영신 (영남대 대학원 전기공학과) ;
  • 이동춘 (영남대 공대 전기공학과) ;
  • 석줄기 (영남대 공대 전기공학과)
  • Published : 2006.01.01
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Abstract

In this paper, a simple scheme compensating for the effect of dc-link ripple voltages on output voltage of two-leg and three-phase PWM inverters is proposed, where single-phase half-bridge PWM convertor and two-leg inverter are used. The voltage at neutral point of the dc-link is controlled so that the upper-half of do-link voltage is equal to the lower-half voltage in average concept. However, the effect of the do-link ripple voltage results in the inverter output voltage and current distortion. This effect can be eliminated by introducing a compensation voltage in switching time calculation. Also, the inverter dead time should be compensated for sinusoidal output waveform. The proposed scheme has been verified by experimental results which were obtained from the V/F constant operation of the induction motor fed by two-leg inverter.

Keywords

References

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