Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Hybrid Sensor-less Control of Permanent Magnet Synchronous Motor in Low-speed Region

  • Yamamoto, Yasuhiro (Core Technology Department Division, Meidensha Corporation) ;
  • Funato, Hirohito (Dept. of Electrical and Electronics Engineering, Faculty of Engineering, Utsunomiya University) ;
  • Ogasawara, Satoshi (Division of Systems Science and Informatics, Hokkaido University)
  • Published : 2008.10.20
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Abstract

This paper proposes a method of improving the stability in sensor-less control of permanent magnet synchronous motors. The control method for low-speed region is divided into two: One is a high frequency method, which involves a problem of reverse rotation once misdetection of the permanent magnet polarity should occur, and another one is a current drive method, which has a problem that phase and speed oscillations are caused by quick speed changes. Hence, authors propose adoption of the current drive method for the basic control system with added compensation of stabilization by means of the high frequency method. This combination secures stable control with no risk of reversal and less vibration. In addition, authors have also considered a frequency separation filter of a shorter delay time so that current control performance will not lower even when high frequencies are introduced. This filter has achieved simplified compensation using repetitive characteristic through the utilization of the periodicity of high frequency current. Simulation and experiment have been conducted to verify that the stable performance of this system is improved.

Keywords

References

  1. T. Aihara, A. Toba, T. Yanase, "Sensor-less Torque Control of Salient-Pole Synchronous Motor at Zero Speed Operation", the 1996 Japan Industry Applications Society Conference, No. 170, pp.1-2, 1996
  2. P. L. Jansen, R. D. Lorenz, "Transducerless position and velocity estimation in induction and salient AC machines", IEEE Trans. Industry Application, Vol. 31, No. 2, pp. 1162-1169, March/April 1995
  3. M. Schroedl, "Sensorless control of AC machines at low speed and standstill based on the 'INFORM' method", Conf. Rec. of IEEE IAS. Annual Meeting, pp. 270-277, Oct. 1996
  4. S. Ogasawara, H. Akagi, "An approach to real-time position estimation at zero and low speed for PM motor based on saliency", in Proc. IEEE Ind. Appl. Soc. Annual Meeting, San Diego, CA, pp.29-35, Oct. 5-10, 1996
  5. N. Bianchi, S. Bolognani, "Influence of Rotor Geometry of an IPM Motor on Sensorless Control Feasibility", IEEE Trans. Industry Application, Vol. 43, No. 1, pp. 87-96, 2007 https://doi.org/10.1109/TIA.2006.887317