Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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An Improved Speed Estimation Scheme for Induction Motor Drive in the Field Weakening Region

  • Shin Myoung-Ho (Department of Electrical Engineering, Hanyang University) ;
  • Kim Dae-il (Department of Electrical Engineering, Hanyang University) ;
  • Hyun Dong-Seok (Department of Electrical Engineering, Hanyang University)
  • Published : 2001.10.01
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Abstract

In a conventional speed sensorless stator flux­oriented (SFO) induction machine drive system, the estimated speed is delayed in transients by the use of a low pass filter. This paper investigates the problem of a conventional speed sensorless SFO system due to the delay of the estimated speed in the field weakening region. In addition, this paper proposes a method to estimate exactly speed by using Kalman filter. The proposed method is verified by simulation and experiment with a 5-hp induction motor drive.

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