Research on High Efficiency and High Boost Ratio DC Converter for Fuel Cell

With the increasing shortage of traditional energy resources, new energy resources such as fuel cells are widely used. However, the front-end output voltage of new energy power generation system such as fuel cells is low, which can not directly supply power to the load. Therefore, an efficient DC converter with high boost ratio is needed to raise the voltage to the required level. The staggered parallel DC boost converter has the characteristics of small input current ripple and high voltage gain, which is very suitable for low voltage and high current input and high voltage output. Compared with Si Mosfet, SiC Mosfet has better on-state and on-switch characteristics. Based on the interleave and parallel Boost circuit topology, this paper used a 12-channel interleave and parallel scheme to calculate the selection of SiC Mosfet, SiC Diode, inductor and capacitor in detail, and designed a 150kW DC-DC converter on this basis.