AN ENHANCED DC-DC MULTI PORT CONVERTER FOR ELECTRIC VEHICLE APPLICATIONS

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 crossregulation 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 iL1 > iL2 > iL3 or iL1 < iL2 < iL3). Cross regulation problems do not exist in the proposed topology, so the load voltage V01 (V02) (V03) is not affected by the variation of output current i03 (i02) (i01). 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.