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Firstly, to minimize the ripples of the electric magnetic torque and flux linkage produced in the conventional direct torque control (DTC) system for permanent magnet synchronous motors (PMSM); this paper proposes a expected space vector modulation (ESVM) strategy of DTC. The expected voltage was produced by SVM. PI controller was used in flux and torque controller, instead of hysteresis comparator...
As a motor designed for electric vehicles (EVs), the stator-doubly-fed doubly salient (SDFDS) motor has the advantage of regulating the field flux independently and effectively. To satisfy the demands of high efficiency and fast torque response in wide range of velocity for EVs, a loss model based controller (LMC) is used to realize the on-line efficiency optimization and high dynamic response of...
In this paper, we compare the aluminum die-cast bar with copper die-cast bar and we study the optimal design of copper die-cast rotor bars of three phase induction motors with respect to the values of starting torque, efficiency. The study is base on the Taguchi method and the finite element analysis of the three phase induction motor where the rotor slots. The Taguchi method has been widely used...
In electricity net, three-phase induction motor is the main load, actually, the running motors are mostly working under light-load or zero-load condition. The paper analyzes the changes of the loss and stator current of the motor during voltage-reduce and theoretically proves that stator current of motor is basically of the minimum value when the loss of motor is least, therefore, it is possible to...
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