Abstract
In this paper, a family of RPWM techniques for the direct torque control (DTC) of open end winding induction motor (OEWIM) drive are presented. The conventional PWM inverters generate high harmonic content and concentrated power spectrum. Using RPWM techniques the harmonic spectrum of inverter is continuously distributed, and thus, the harmonic content in the current waveform is reduced, resulting reduction of ripple in electro-magnetic torque. The simulation results of the DTC of OEWIM drive prove the effectiveness of RPWM techniques in the reduction of the ripple and harmonic contents.
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