Abstract
This paper presents a synchronized voltage mode analog control strategy for a multi-port dc-dc converter. The proposed control strategy provides simultaneous dual regulated output voltages for boost and buck modes of operation from a single input. The dynamics of the multi-port DC-DC converter is modeled with small signal analysis. A type-II and a type-III compensators are designed for the boost mode and for the buck mode operation of the converter respectively. The control strategy is experimentally validated using a laboratory prototype for a boost output of 60V and buck output of 15V for an input voltage of 30V with an output power of 150W. The closed loop performance of the converter is demonstrated for a load change of 2A and input voltage variation of ±5V i.e., ±15% line voltage variation.
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