한국철도학회논문집 (Journal of the Korean Society for Railway)

  • 제20권5호
  • /
  • Pages.588-594
  • /
  • 2017
  • /
  • 1738-6225(pISSN)
  • /
  • 2288-2235(eISSN)
한국철도학회 (The Korean Society for Railway)
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고속철도 추진용 5상 영구자석 저감형 동기전동기의 최적설계

Optimal Design of Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor for High Speed Railroad Traction System

  • Baek, Jeihoon (School of Electrical, Electronics and Communication Engineering, Korea University of Technology & Education) ;
  • Kim, Myung Yong (Metropolitan Transportation Research Center, Korea Railroad Research Institute) ;
  • Yi, Kyung-Pyo (Metropolitan Transportation Research Center, Korea Railroad Research Institute)
  • 투고 : 2017.08.10
  • 심사 : 2017.08.23
  • 발행 : 2017.10.31
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초록

영구자석 저감형 동기전동기는 기존의 고속철도 추진용 유도기보다 높은 효율과 출력밀도를 보이고, 일반적인 영구자석 동기전동기에 비해 자석 사용량을 줄여 가격을 낮출 수 있다. 또한 5상 구동 시스템을 사용할 경우 3상 시스템에 비해 낮은 토크리플과 높은 출력밀도를 가지게 된다. 이러한 특성으로 인해 5상 영구자석 저감형 동기전동기는 고속철도 추진용 전동기로 적합한 특성을 가진다. 본 연구에서는 집중상수모델과 유전알고리즘을 이용하여 3상 및 5상 영구자석 저감형 동기전동기 3kw 축소모델을 최적설계하고 이들의 특성을 비교하였다. 또한 유한요소해석을 이용하여 최종 보정설계를 진행한 3상 및 5상 전동기를 제작하고 실험을 통해 해석값을 검증하였다.

Permanent magnet assisted synchronous reluctance motors (PMa-SynRM) show higher efficiency and power density compared to conventional induction motors for high speed railroad traction systems. Furthermore, 5-phase PMa-SynRMs have lower torque ripple and higher power density than 3-phase systems. Therefore, the 5-phase PMa-SynRM is suitable for high-speed railway traction systems. In this study, 3kw 3-phase and 5-phase PMa-SynRM models were optimized using lumped parameter model and genetic algorithm, and their characteristics were compared. The optimized models are fine-tuned using finite element analysis. The final models of the 3-phase and 5-phase PMa-SynRMs are fabricated and tested to verify the analysis results.

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참고문헌

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