Analysis and Design of an LC Parallel-Resonant DC-DC Converter for a Fuel Cell Used in an Electrical Vehicle

摘要

In this paper, the design methodology of a parallel-resonant LC converter for fuel cell applications in the electric vehicle is proposed in order to achieve high eficiency. Although the converter is unidirectional, it is interposed between the fuel cell and the DC link. Additionally, the converter is made up of two full bridges, an LC resonant filter and a planar transformer. The use of a high-frequency transformer enables to minimize the converter size and the weight, to produce a higher voltage in the secondary side from an input voltage (fuel cell) and to isolate the full bridges. Furthermore, the rectifier diodes operate with a zero-current switching. Therefore, an experimental converter prototype has been designed, simulated, built and tested in the laboratory. Finally, a prototype having 30V as an input and 150V as an output with 500W is designed to demonstrate and analyze the proposed converter.