Abstract
This article deals with autotransformer based multipulse AC-DC converters feeding vector controlled induction motor drives (VCIMDs) for improving power quality at the point of common coupling (PCC). The proposed 24-pulse AC-DC converter is realized on the principle of DC ripple re-injection technique for pulse multiplication and harmonic mitigation. The design of the autotransformer is given for the proposed AC-DC converter for making it suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of the proposed AC-DC converter. The test results, along with simulated results, on a developed laboratory prototype are presented to validate the design and model of the proposed 24-pulse AC-DC converter.
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