A Novel Single Switched High Gain Isolated DC-DC Converter for Electrical Vehicles and Charging Applications

In this paper, a novel configuration of a single switched Buck-boost DC-DC converter is presented with a switched coupled inductor cell. This topology is developed in such a way that it is best suitable for electric vehicles and their charging applications. It has captivating properties like continuous input current, an optimal power factor correction technique and the possibility of providing a wide voltage gain with no limitation on the range of the duty cycle. The presented topology is configured with less number of components, and it also incorporates coupled inductor, which isolates the source from the load with different ground and also helps to reduce the switching voltage stress. In this paper, the central emphasis is given to the design and analysis of a presented topology, and the converter performance is examined and compared with other recent topologies. The simulations were conducted using PSIM software with a 100 W power level at 60 kHz frequency. To ensure the presented topology operates in Buck-Boost mode, Converter is tested using input voltage levels of 20 V and 300 V to maintain a constant output voltage of 240 volts at the corresponding duty ratios.