Abstract
In this paper, a novel topology based on center-point-clamped circuit configuration for ac-ac power conversion has been presented. This converter introduces a unique methodology to clamp the voltage to the mid-point of the input transformer thus reducing voltage blocking requirements on the bi-directional switches employed in such direct ac-ac converter. Operating principles as well as dynamic analysis for the proposed converter have been presented in the paper. A feedback controller has been designed for closed loop control of the proposed center-point-clamped ac-ac converter. Simulation results presented in the paper verify that the proposed converter offers high power transfer efficiency compared to conventional ac-dc-ac converters, and smaller output voltage ripple along with reduced voltage stress on the bi-directional switches when compared to other direct ac-ac converters.
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