ANN Based Closed loop control scheme for transformer less DC – DC Converter

Abstract

A bidirectional DC-DC Converter by using sliding mode controller is designed and simulated in this paper. The proposed converter employs a coupled inductor with same winding turns in primary and secondary sides. In step-up mode, to achieve high step-up voltage gain, the primary and secondary windings of the coupled inductor are charged in parallel and discharged in series. In step-down mode, to achieve high step-down voltage gain, the primary and secondary windings of the coupled inductor are charged in series and discharged in parallel. The structure of the proposed converter is very simple. Thus, the proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional boos/buck converter. The operating principle and efficiency analysis are discussed in detail. Finally, a 14/42-V circuit in closed loop mode is designed and simulated to verify the performance for the automobile battery system.
Keywords
Bidirectional dc-dc converter; Sliding Mode Controller; coupled inductor