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This paper deals with a novel autotransformer based improved power quality eighteen-pulse ac-dc converter feeding vector controlled induction motor drives (VCIMD's). The design of the proposed autotransformer is presented along with the necessary modifications required for making it suitable for retrofit applications, where presently a 6-pulse diode bridge(More)
This paper presents the design and analysis of a star connected autotransformer based twelve-phase AC-DC converter for improving power quality at the point of common coupling (PCC) in direct torque controlled induction motor drives (DTCIMDs). A star connected autotransformer with five windings per phase is used to realize the twelve-phase AC-DC converter.(More)
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