The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Analysis of Common Mode Voltages at Diode Rectifier/Z-Source Inverter System

다이오드 정류기/Z-소스 인버터 시스템의 공통모드 전압 해석

  • 트란콴빈 (울산대 대학원 전기공학과) ;
  • 전태원 (울산대 전기전자정보시스템공학부) ;
  • 이홍희 (울산대 전기전자정보시스템공학부)
  • Published : 2009.08.20
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Abstract

In this paper, when ac motors are driven by the diode rectifier/Z-source inverter system, the common-mode voltages of system are analyzed in details under both the shoot-through state and non-shoot-through state through equivalent circuits. Then a modified space vector modulation strategy is suggested for attenuating the negative common-mode voltage by eliminating the zero voltage vector, and also controlling the shoot-through time. Through the simulation studies with PSIM and experiments with 32-bit DSP, it is verified that the negative common-mode voltage can be reduced by more than 50%.

본 논문은 다이오드 정류기와 Z-소스 인버터로 교류전동기 구동 시 암 단락 (shoot-through) 상태와 비 암 단락 상태를 나누어 각각 등가회로를 구성하고 공통모드 전압을 분석한다. 음의 값의 공통모드 전압을 감소시키기 위하여 암 단락 시간 제어와 함께 영전압 벡터인가 구간을 제거하는 변형 공간벡터변조기법을 제시한다. PSIM과 32-비트 DSP를 사용한 실험 및 시뮬레이션 결과를 통하여 음의 공통모드전압이 50%이상 감소됨을 확인하였다.

Keywords

References

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