A new topology of DC-DC Converter with Bidirectional Power Flow Capability Coupled with a Nine Multilevel Inverter for EV Applications

As the growth of battery powered electric vehicles is increasing, a high boost in the DC voltage is essential before interfacing the high gain converter to the grid through an inverter. Apart from this, the role choppers in PV systems and energy storage purposes also serves good. The input current among inductors can be shared by paralleling the converters, making the power electronic systems to be highly reliable and efficient. This paper discusses the circuit model and performance of a bidirectional chopper with coupled inductor for electric vehicle applications. The coupled inductor operates as the filter inductor for non-isolated part of the converter and as a transformer for the isolated converter topology. The reduction of switching voltage stress across the power semiconductor devices is achieved by series connection of two switch bridges. This converter is further tested with a nine level inverter. The bidirectional converter designed for electric vehicles is further interfaced with a multilevel inverter (nine level). The implementation of the converter design is simulated using MATLAB/SIMULINK.