Design and Implementation of Single-Input-Multi-Output DC-DC Converter Topology for Auxiliary Power Modules of Electric Vehicle

Abstract

A compact DC-DC converter is required as an auxiliary power module in Electric Vehicles (EVs) to power the onboard electric motor and other auxiliaries. Most of the existing multi-port converters have limitations on duty ratio, charging currents of the inductor (iL1>iL2 or iL1<iL2), output voltages (V01>V02 or V01<V02), and the issue of cross-regulation during load variation. This paper presents a multi-port DC-DC converter with Single-Input Multiple-Output (SIMO) to circumvent all these limitations. The proposed topology generates independent outputs without affecting the other loads during the operation. It is observed that cross-regulation is effectively eliminated while controlling the loads. The control of the converter is simple without any duty ratio and inductor current charging constraints. The validity of the proposed converter has been verified by using a prototype with a 100W rating and delivers two output voltages of 24V and 14.4V at duty ratios of 50% and 30% with an input voltage of 48V. It can be extended to multiple outputs. The simulation and experimental results are analyzed to prove the effectiveness of this auxiliary power module for EV applications.

Coupled inductor‐based triple output bi‐polar converter with duty cycle estimation

“…Many such applications have already been discussed in literature. Other papers [1][2][3][4][5] discuss positive dual output converter topologies and their control techniques. In Ray et al's 1 paper, control switch of a conventional boost converter is replaced by series connected switches, but conduction loss is higher as both switches are operated together to get dual outputs.…”

“…In Ray et al's 1 paper, control switch of a conventional boost converter is replaced by series connected switches, but conduction loss is higher as both switches are operated together to get dual outputs. Dhananjaya et al 2 described a converter with step down outputs, but topology extension with boost or bi‐polar outputs is not possible. This paper 3 explains a single switch converter but with dual outputs.…”

Grid and Solar Photovoltaic Sources Assisted Charging System for Electric Vehicles

“…Battery charging using non-isolated topologies of the DC-DC converters has been observed for medium-level and high-power appliances or instruments [16]. The boost converter and interleaved boost converters are used to charge the batteries of electric vehicles with medium and lower DC-link voltages [17][18][19]. The dc voltage gain ratings of CUK converters and buck-boost converters are lower.…”