ENVELPPE CYCLOCONVERTER BASED ON INTEGRAL HALF CYCLE SELECTION AND HALF CYCLE OMISSION TECHNIQUE

Abstract

This paper proposes a new three-phase envelope cycloconverter based on integral half cycle selection with selected half cycle omission (HCO) technique. The advantage of using this technique is to eliminate completely the dominant supply frequency harmonic component and other undesirable harmonic components that may present in the conventional frequency division cycloconverter output voltage waveforms. Total harmonic distortion is drastically reduced and the possible risk of supply short-circuit is effectively minimized. The output voltage and current of this converter are smooth compared with corresponding waveforms obtained by conventional converters.