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.

Keywords

• Multiport converters
• single input multi output converters