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

The Korean Institute of Power Electronics (전력전자학회)
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PWM Variable Carrier Generating Method for OEW PMSM with Dual Inverter and Current Ripple Analysis according to Zero Vector Position

듀얼 인버터 개방 권선형 영구자석 동기 전동기 제어를 위한 PWM 가변 캐리어 생성법 및 영벡터 위치에 따른 전류 리플 분석

  • Shim, Jae-Hoon (Dept. of Electrical and Computer Eng., Seoul Nat'l University, Electric Power Research Institute) ;
  • Choi, Hyeon-Gyu (Dept. of Electrical and Computer Eng., Seoul Nat'l University, Electric Power Research Institute) ;
  • Ha, Jung-Ik (Dept. of Electrical and Computer Eng., Seoul Nat'l University, Electric Power Research Institute)
  • Received : 2020.01.31
  • Accepted : 2020.04.07
  • Published : 2020.08.20
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Abstract

An open-end winding (OEW) permanent magnet synchronous motor with dual inverters can synthesize large voltages for a motor with the same DC link voltage. This ability has the advantage of reducing the use of DC/DC boost converters or high voltage batteries. However, zero-sequence voltage (ZSV), which is caused by the difference in the combined voltage between the primary and secondary inverters, can generate a zero-sequence current (ZSC) that increases system losses. Among the methods for eliminating this phenomenon, combining voltage vector eliminated ZSV cannot be accomplished by the conventional Pulse Width Modulation(PWM) method. In this study, a PWM carrier generation method using functionalization to generate a switching pattern to suppress ZSC is proposed and applied to analyze the control influence of the center-zero vector in the switching sequence about the current ripple.

Keywords

References

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