Design guideline of the isolated DC-DC converter in green power applications

This paper presents the general design guideline of the isolated DC-DC converter used in green power applications. At the beginning of the paper, the circuit candidates are compared with each other, and one optimized circuit topology is proposed based on the circuit and stability characteristic analysis of the controlled and uncontrolled rectifier. The operating modes, peak current and power transfer ability of the selected circuits are fully analyzed. The design guideline of the DC-DC converter is presented based on the analysis. The experimental results of a 5 kW DC-DC converter in fuel cell inverter system are shown to support the analysis and illustrations. The simulation result of a proposed circuit is also shown to support all the analysis.