Abstract
While dc drive is supplied from ac utility, ac to dc conversion can be achieved by using ac-dc converter. But this conversion is affected by harmonics causing high Total Harmonic Distortion (THD) which suffers from the fact that the performance of dc drive gets affected. Harmonic mitigation of the input side voltage of dc drives can be achieved up to a notable range by using single tuned passive filter. In this paper, harmonics developed in case of three phase ac-dc converter based self-excited dc shunt motor is analyzed and also with a view to achieving prominent improvement in THD which is less than 10% according to IEEE standards 519–1992, single tuned passive filter is initialized. The simulation setup of this work using single tuned passive filter demonstrates the significant improvement of THD in comparison with the simulation arrangement without using filter. Moreover, the comparative analysis of speed of self-excited de shunt motor with and without single tuned passive filter is a major concern of this work with reduced THD without trading off much of the speed.
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