High-performance single-input three-output DC-DC high gain converter for fuel cell-based electric vehicles

摘要

The electric vehicle (EV) requirement has various glitches and solutions in EV technology. Alternate energy that delivers the required power to the EVs is derived from the fuel cell with high performance. Nevertheless, the output voltage obtained from the fuel cell system is very less, and it is not enough to drive the motor of the EVs. The DC-DC converter increases the output voltage of the fuel cell system, and the EV also requires a different output voltage for the entire system. The DC-DC converter for fuel cell-based EVs requires high voltage gain with high conversion efficiency. However, the converter based on single-input three-output (SITO) DC-DC unidirectional converter can reduce loss and the cost of the system, and hence the overall efficiency. In this paper, a new single power-switch-based SITO converter topology is proposed to improve the voltage gain and conversion efficiency. The converter presented in this paper acts as a front-end DC-DC converter for the DC-AC inverter, and it supplies power to the auxiliary DC loads or for charging the auxiliary battery in EV. The converter has a single-stage voltage multiplier cell with a voltage clamp circuit to improve the voltage gain with soft-switching to reduce the loss, and hence the efficiency. The proposed converter is operated with a single MOSFET switch which delivers three different output levels with less voltage stress across the switch is the main feature of the proposed converter. The theoretical analysis is validated through the experimental results, and results verify that the proposed converter is best suitable for EV applications.