A New Multi-Output Dc-Dc Converter for Electric Vehicle Application

Abstract: Multiport converters play a significant role in portable electronic and electric vehicle (EV) applications. In literature, different configurations of single-input multi-output (SIMO) converters are presented. Most of the SIMO converters generate the outputs with operating constraints on the duty ratio and charging of inductors. The cross- regulation problem is still a challenge in SIMO converters design. A SIMO topology is proposed in this study to overcome the limitations mentioned earlier. It can generate three different output voltages without constraint on the duty cycle and inductor currents. Cross regulation problems do not exist in the proposed topology, so the load voltage is not affected by the variation of output current. The loads are isolated from each other during control. In the laboratory, a 200 W prototype circuit is developed; simulation and experimental results are validated.

Keywords: Multiport converters, single input multi output converters, electric vehicles, DC-DC converter, cross- regulation.