Polygon Connected 15-Phase AC-DC Converter for Power Quality Improvement

This paper presents a polygon connected autotransformer based 15-phase ac-dc converter for power quality improvement in vector controlled induction motor drives (VCIMD's). The proposed multi-phase ac-dc converter is based on a polygon connected autotransformer, designed for producing 15-phase voltages for effective harmonic reduction. The effect of load variation on drive is also studied to demonstrate the effectiveness of the proposed ac-dc converter. A set of power quality indices on input ac mains and on dc bus is also presented.