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Thrust Performance Improvement of a Linear Induction Motor

  • Lee, Hyung-Woo ;
  • Park, Chan-Bae ;
  • Lee, Byung-Song
  • Received : 2010.05.14
  • Accepted : 2010.06.22
  • Published : 2011.01.01

Abstract

The end effect of a linear induction motor (LIM) has been known for several decades, especially in high speed operation. The exit part of the primary is not dealt as extensively as the entry part because of its minor effect. However, the exit part is one of the keys to weaken the dolphin effect, which occurs in high speed operation. In this paper, the concept of the virtual primary core is introduced, and chamfering of the primary outlet teeth is proposed to minimize the longitudinal end effect at the exit zone. For this, LIM for the high-speed train is designed and analyzed by using finite element method. Results confirm that chamfering can improve thrust performance effectively.

Keywords

End effect;Dolphin effect;LIM;Linear motor;Virtual primary core

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