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The paper summarises the authors' reported and ongoing research on both modelling and on sensorless control and power-factor improvement of switched-reluctance-machine (SRM) drives. The paper presents four models of SRMs: the piecewise-interpolation model using a two-dimensional (2-D) bicubic spline, an analytical model based on the 2-D least-squares technique, a cross hybrid model based on the 2-D bicubic and 2-D bilinear splines, and the coupling model taking account of mutual coupling. These four models are validated by simulations and experiments. An estimation scheme of the initial rotor position at standstill and a sensorless control scheme at low and high speeds are also developed. In addition, the authors have studied the effect of the control and output parameters on power factor in SRM drives. Consequently, a new control strategy and two real-time schemes for improving the power factor have been developed.
Xue et al. (Fri,) studied this question.
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