Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis of Torque Characteristics of Step Motor by FEM

유한요소법에 의한 스텝모터의 토크특성 해석

  • Bae, D.J. (R&D CENTER, HYUNDAI ELECTRICAL ENGINEERING CO.) ;
  • Lee, J.I. (R&D CENTER, HYUNDAI ELECTRICAL ENGINEERING CO.) ;
  • Lee, J.I. (R&D CENTER, HYUNDAI ELECTRICAL ENGINEERING CO.) ;
  • Park, H.J. (R&D CENTER, HYUNDAI ELECTRICAL ENGINEERING CO.) ;
  • Kim, J.K. (R&D CENTER, HYUNDAI ELECTRICAL ENGINEERING CO.) ;
  • Hahn, S.Y. (DEPT. OF ELECTRICAL ENG. SEOUL NATIONAL UNIVERSITY)
  • 배동진 (현대중전기(주) 기술연구소) ;
  • 이종인 (현대중전기(주) 기술연구소) ;
  • 이정일 (현대중전기(주) 기술연구소) ;
  • 박현준 (현대중전기(주) 기술연구소) ;
  • 김종구 (현대중전기(주) 기술연구소) ;
  • 한송엽 (서울대학교 전기공학과)
  • Published : 1993.07.18
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Abstract

The technique to design high performance small motors has been based on experimental data, which results from lots of cost, experience and time in manufacturing. Recently, as high-performance computer appears, many engineers use numerical methods to design and analyze electric machine. Since, the step motor which has very small air gap(0.02-0.05mm) is different from other electric machine in its structure. The shape of rotor teeth and stator teeth influence seriously on the torque characteristics. And it is operated over magnetic saturation point. Therefore, the design of step motor needs to solve nonlinear problem and to calculate magnetic field precisely. In this paper, we solve nonlinear problem by employing Finite Element Method and obtain torque-displacement characteristics for the design of step motor. We also manufacture VR step motor according to the obtained results, and measure some torque characteristics. Through comparing calculated results with experimental results, it is verified that FEM is very useful to design step motor, and the motor designed by our technique is improved in its step accuracy.

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