Quasi mutually coupled active impedance source converter — autotransformer type turns ratio

Abstract

The proliferation of mutually coupled Inductor to obtain high gain is getting attention for enhancing the boosting factor of impedance source converter. Reduced number of inductors required for the achieving high gain is the key feature. For mutually coupled inductor, the boost­ing factor is dependent on its turns ratio similar to a step up two winding transformer. To make effective turns greater than the two winding transformer, autotransformer is suggested. Therefore to achieve higher gain, the mutually coupled inductor are connected similiar like autotrans­former. Using autotransformer principle, this paper pro­poses a quasi Mutually Coupled Active Impedance Source Converter(QMCIAS) to achieve higher gain. The QMCIAS exhibits continuous input current which makes it suitable for PV applications. To validate the theoretical proposal, a prototype is designed and tested experimentally.