Design and Implementation of Triple Output Forward DC-DC Converter with Coupled Inductor as Post-regulator for Space Application

Abstract

Forward Converter is highly preferred for designing Power Supply Units in space applications, because of its simple structure and provides perfect isolation between input and output .The design of precision converters should take care of variation of the power supply voltage. In achieving Closed Loop implementation of DC-DC converter, Coupled Inductor is considered very effective as Post-regulator for Forward Converter. The proposed Inductor is designed on the basis of transformer and filter Inductor turns. Inductor designed in this manner provides faster response, better coupling and reduces leakage. This coupled Inductor design can be effectively utilized to other isolated topologies. The proposed topology can be used for space applications and it has been demonstrated experimentally delivering three outputs of the range 5V/4A,+15V/0.677A and -15V/0.677A from an input range of 18-50V, also with an efficiency of greater than 78% at full load.