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 (like i-{L1} > i-{L2} > i-{L3} or i-{L1} < i-{L2} < i-{L3} ). Cross regulation problems do not exist in the proposed topology, so the load voltage V-{01} ( V-{02} ) ( V-{03} ) is not affected by the variation of output current i-{03} ( i-{02} ) ( i-{01} ). 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.