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Analysis of hysteresis in resonance-based position estimation of switched reluctance drives

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3 Author(s)
Geldhof, K. ; Dept. Electr. Energy, Syst. & Autom., Ghent Univ., Ghent, Belgium ; Sergeant, P. ; Melkebeek, J.

In switched reluctance motors, rotor position information can be extracted from the measurement of position-dependent phase voltage resonances. Due to hysteresis in the magnetic core of the machine, subsequently triggered resonances can exhibit different resonance waveforms, even when the rotor is held at a constant angular position. In order to analyze the influence of hysteresis, a finite-difference model of a magnetic lamination is coupled with a Preisach model. A good correspondence is obtained between simulated and measured time-domain resonance waveforms. The model is used to predict the impact of hysteresis on the sensorless position estimation.

Published in:

Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on

Date of Conference:

9-12 May 2010