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The cogging torque of variable flux reluctance machines (VFRMs) is usually large, which will result in undesired vibrations and acoustic noises. This paper introduces several methods to reduce the cogging torque of VFRMs including asymmetrical rotor teeth, circumferential rotor teeth pairing, rotor teeth shaping and rotor dummy slots. First, the cogging torque of VFRMs are analytically calculated,...
In this paper, a hybrid speed controller based on proportional integral (PI) controller and artificial neural network(ANN) is proposed as a speed controller for an indirect field oriented induction motor vector control system. The new controller has self-learning and self-organization capabilities. Its parameters are adjusted online according to back propagation (BP) algorithm. The weighting coefficients...
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