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Finite-element analysis characterisation of a switched reluctance motor with multitooth per stator pole

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3 Author(s)
Lindsay, J.F. ; Concordia University, Department of Electrical Engineering, Montreal, Canada ; Arumugam, R. ; Krishnan, R.

The paper describes the use of a 2-dimensional finite-element field analysis (FEA) to obtain N¿/i/ rotor position characteristics of a doubly salient switched reluctance motor. The stator and rotor have even but unequal numbers of poles. Unlike the single tooth per pole construction of the most common doubly salient pole motors, the motor considered for analysis has two teeth per stator pole. The increase in torque developed due to the multitooth stator pole configuration has been reported by Finch et al. in May 1984. An accurate knowledge of flux pattern inside the motor is essential to a machine designer for performance prediction. The complex configuration and material nonlinearities of the motor makes analytical methods of magnetic field analysis difficult. The numerical method (FEA) used gives a better understanding of the flux distribution inside the motor. The terminal inductance per phase, the flux linkage of each stator pole winding, and the components of the leakage inductances are determined for different rotor positions and excitation currents. The average torque developed by the motor is also determined under current forced conditions.

Published in:

Electric Power Applications, IEE Proceedings B  (Volume:133 ,  Issue: 6 )