Non-Isolated Three Port DC-DC Converter with Soft Switching Technique*

In this Paper, a three-port DC-DC boost converter with soft switching is proposed. The suggested converter provides a unidirectional power port for input power supply and a bidirectional power port for energy storage element in a single structure. Supplying output load and charging/discharging of the battery can be done through the input source. Both switches used in this converter are turned on in zero voltage switching (ZVS) mode; thus, the loss of switching is reduced significantly. For soft switching, a lossless active snubber is used. A simple controller is used for power management, which will provide continuous power injection to the load. In this converter, based on the power demand in the load, three different operational modes are introduced, which every three of them are studied in this paper and the relating simulation results are presented.