Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Study of the Method of Calculating Maximum Voltage for Flux-Weakening Operation of Interior Permanent Magnet Synchronous Motor

매입형 영구자석 동기전동기의 약계자 제어를 위한 최대전압 선정에 관한 연구

  • Kim, Jang-Mok (Korea Electric Power Corporation Research Institute) ;
  • Kim, Su-Yeol (Korea Electric Power Corporation Research Institute) ;
  • Ryu, Ho-Seon (Korea Electric Power Corporation Research Institute) ;
  • An, Yong Ho (Korea Electric Power Corporation Research Institute) ;
  • Yoon, Gi Gab (Korea Electric Power Corporation Research Institute) ;
  • Lim, Ik-Hun (Korea Electric Power Corporation Research Institute) ;
  • Jun, Hyang-Sig (Korea Aerospace Industries, LTD.)
  • 김장목 (한국전력공사 전력연구원) ;
  • 김수열 (한국전력공사 전력연구원) ;
  • 류호선 (한국전력공사 전력연구원) ;
  • 안용호 (한국전력공사 전력연구원) ;
  • 윤기갑 (한국전력공사 전력연구원) ;
  • 임익헌 (한국전력공사 전력연구원) ;
  • 전향식 (한국항공우주사업(주))
  • Received : 2000.02.22
  • Accepted : 2000.03.21
  • Published : 2000.06.30
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Abstract

The constraint conditions are the stator voltage and the stator current to operate the motor in the flux weakening region. The maximum current is limited by the inverter current rating and the machine thermal rating. Given DC link voltage to control the motor in the flux weakening the maximum voltage is determined by considering PWM strategy, dead time, voltage drop of the inverter switching device, and the margin of the voltage for current forcing. In this paper, the new method to determine the available maximum voltage is derived by the quantitative method and by considering the factors of the voltage drop. The proposed method to determine the maximum voltage is very useful to improve the stability of the motor system and to enlarge the speed operation region in the flux weakening operation. Therefore the utility of the maximum voltage is increased.

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