基于移相全桥的车载辅助充电DC-DC变换器设计

针对纯电动汽车辅助充电DC-DC变换器的设计问题,对纯电动汽车电气系统结构及DC-DC变换器的应用需求进行了分析。并根据实际需求设计了一款基于移相全桥拓扑的DC-DC变换器。该变换器通过在电路原边外加电感拓宽了电路的ZVS范围,通过在原边变压器及外加电感间增加两个箝位二极管抑制了电路的电压尖峰;同时副边采用同步整流技术进一步提升了电路效率。最后给出了电路关键参数的设计过程和控制的实现方法,并搭建了一台实验样机对理论分析进行了验证。研究结果表明,所设计的样机能够输出160 A电流并实现了轻载96%以上的效率。

Design of phase-shift full-bridge DC-DC converter with camping diodes as automotive auxiliary charger

Aiming at the design of the auxiliary charger DC-DC converter in electric vehicles(EVs), EV Electrical system structure and the application requirements of DC DC converter was analyzed. And based on the requirements, a Phase shift Full bridge DC DC converter was designed ,which achieves wide ZVS range and eliminates the voltage oscillation by introducing a resonant inductance and two clamping diodes in the primary side. Synchronous rectification was adopted in the secondary side for a higher efficiency. The design procedure of the key parameters and the control method of the converter were introduced. A prototype was built to verify the theoretical analysis. The results indicate that the prototype can output 160A current and achieve above 96% efficiency at light load. [ABSTRACT FROM AUTHOR]