Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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A Simple Current Ripple Reduction Method for B4 Inverters

  • Lee, Dong-Myung (School of Electronic and Electrical Engineering, Hongik University) ;
  • Park, Jae-Bum (Dept. of Electrical and Computer Engineering, Texas A&M University) ;
  • Toliyat, Hamid A. (Dept. of Electrical and Computer Engineering, Texas A&M University)
  • Received : 2012.09.09
  • Accepted : 2013.03.20
  • Published : 2013.09.01
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Abstract

This paper proposes a simple current compensation method to improve the control performance of B4 inverters. Four-switch inverters so called B4 inverters employ only four switches. They have a split dc-link and one phase of three-phase motors is connected to the center-tap of split dc-link capacitors in B4 inverters. The voltage ripples in the center tap of the dc-link generate unbalanced three-phase voltages causing current ripples. To solve this problem, this paper presents a simple compensation method that adjusts switching times considering dc-link voltage ripples. The validity of the proposed method is verified by simulations and experiments carried out with a 1 HP induction machine.

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References

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