전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제62권3호
  • /
  • Pages.355-364
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  • 2013
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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3상 Z-소스 PWM 정류기의 입력 AC 전압 센서리스 제어

Input AC Voltage Sensorless Control for a Three-Phase Z-Source PWM Rectifier

  • 한근우 (전남대학교 전기공학과) ;
  • 정영국 (대불대학교 융합기술학부) ;
  • 임영철 (전남대학교 전기공학과)
  • Han, Keun-Woo (Dept. of Electrical Engineering, Chonnam National University) ;
  • Jung, Young-Gook (Dept. of Electrical Engineering, Daebul University) ;
  • Lim, Young-Cheol (Dept. of Electrical Engineering, Chonnam National University)
  • 투고 : 2012.12.24
  • 심사 : 2013.02.27
  • 발행 : 2013.03.01
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초록

Respect to the input AC voltage and output DC voltage, conventional three-phase PWM rectifier is classified as the voltage type rectifier with boost capability and the current type rectifier voltage with buck capability. Conventional PWM rectifier can not at the same time the boost and buck capability and its bridge is weak in the shoot- through state. These problems can be solved by Z-source PWM rectifier which has all characteristic of voltage and current type PWM rectifier. By shoot-through duty ratio control, the Z-source PWM rectifier can buck and boost at the same time, also, there is no need to consider the dead time. This paper proposes the input AC voltage sensorless control method of a three-phase Z-source PWM rectifier in order to accomplish the unity input power factor and output DC voltage control. The proposed method is estimated the input AC voltage by using input AC current and output DC voltage, hence, the sensor for the input AC voltage detection is no needed. comparison of the estimated and detected input AC voltage, estimated phase angle of the input voltage, the output DC voltage response for reference value, unity power factor, FFT(Fast Fourier Transform) of the estimated voltage and efficiency are verified by PSIM simulation.

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참고문헌

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