燃料电池电动车用隔离Boost全桥变换器的研究

Isolated Boost Full Bridge Converter for Fuel Cell Electric Vehicle

针对燃料电池电动车辅助能源系统低压大功率、大升压比的特点,分析了几种隔离变换器方案,这几种方案均难以做到大功率应用。为此,提出了采用隔离Boost全桥变换器拓扑方案可有效地解决上述技术难点。文中介绍了该方案的原理,详细分析了控制系统,给出了数字化控制的实现方法和主电路关键参数的设计。为了验证上述方案的正确性,设计了5 kW,24 V输入300 V输出的隔离Boost全桥变换器。实验结果表明,系统具有良好的动态和静态性能,能有效地应用于电动汽车等领域。

Several isolated power converters are analyzed for applications of the low input voltage, the high output voltage, and the high power of an auxiliary power system in a fuel cell electric vehicle. All converters are difficult to be used in the high power application. The proposed isolated Boost full bridge converter can solve the above problems. The principle of the converter is introduced and the control system is analyzed. And the digitally controlled method and the key parameter design method are given. To verify the correction of the proposed scheme, a 24 V （input）, 300 V （output）, 5 kW converter is developed. Experimental results show that fine static and dynamic performances are achieved.