Abstract
An enhancement in dynamic performance of a traditional direct torque control (DTC) drive can be achieved by a robust speed control algorithm while the steady state performance depends upon an efficient flux estimation algorithm. In this paper a conventional PI controller in the speed control loop is replaced by a sliding mode speed controller and a modified low pass filter based digital integration algorithm with tunable cut off frequency is proposed for flux estimation. The proposed study is investigated through simulation and experimentally validated on a test drive.
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