The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Zero Power Levitation Control of Hybrid Electro-Magnetic Levitation System by Load Observer

부하 상태관측기에 의한 하이브리드 부상 시스템의 제로 파워 부상 제어

  • 김윤현 (한양대 대학원 전기공학과) ;
  • 이주 (한양대 전자전기컴퓨터공학부)
  • Published : 2001.06.01
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Abstract

This paper introduces the scheme that improve the control performance of electromagnetic levitation system with zero power controller. Magnetic levitation is used widely, but the electromagnetic force has nonlinear characteristics because it is proportioned to a square of the magnetic flux density and it is in inverse proportion to a square of the airgap. So, it is complicate and difficult to control the electromagnetic force. Besides, it is more difficult to control if the equivalent gap is unknown in case of zero power control. Therefore, this paper proposed the hybrid electro-magnetic levitation control method in which the variable load is estimated by using a load observer and its system controlled at a new zero power equilibrium airgap position. Also it is confirmed that the proposed control method improve the control performance through simulation and experiment.

Keywords

References

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