基于车载用燃料电池直流变换器的研究及应用

通过对燃料电池的特性及碳化硅(SiC)功率器件分析,研究适合车载用的高效率和高可靠性的燃料电池专用Boost变换器。通过对变换器的拓扑结构的优化、效率的提升及控制方法改进等方面研究,设计了一款电压变换比大的适合燃料电池运行要求的高效及可靠运行的变换器。试验样机测试证明,该变换器具有良好的动态和稳态控制特性、效率高,可实现燃料电池的稳定输出运行,有效保护了燃料电池,进一步延长了燃料电池寿命。

Research and Application of Automotive Fuel CellDC Converter Based on Vehicle

Through the analysis of the characteristics of fuel cells, the main research for vehiclemounted fuel cell power electronics converter was given. Through the optimization of the topology of the Boost converter, the improvement of the efficiency and the improvement of the control method, the design of an efficient and reliable converter suitable for the fuel cell with a large voltage conversion ratio was designed. Through experimental tests, it was proved that the converter could realize stable output operation of the fuel cell, effectively protect the fuel cell, further prolong the life of the fuel cell, and prevent the battery characteristics from being lowered.