适用于汽车电源系统的全桥推挽式双向DC-DC变换器

Bidirectional DC-DC Converter with Full-bridge/Pushpull Circuit for Automobile Electric Power Systems

近年来,带有超级电容器的储能系统受到广泛的关注和研究,逐渐发展成为电子化汽车的电源系统。本文提出了一种全桥推挽式双向DC-DC变换器及其控制方法,通过实验验证,该系统能够实现低压大电流超级电容侧和高压弱电流传动和蓄电池侧之间充分的充放电操作。此外,利用零电压(ZVS)技术,在高压侧设置无损耗缓冲电容和在低压大电流超级电容侧设置同步整流器,可以大大减小传导损耗和电压/电流浪涌。

In recent years,energy storage systems assisted by super capacitor have been widely researched and developed to progress power systems for the electronic vehicles.In this paper,a full-bridge/push-pull circuit-based bidirectional DC-DC converter and its control methods are proposed.From the results of detailed experimental demonstration,the proposed system is able to perform adequate charge and discharge operation between low-voltage high-current super capacitor side and high-voltage low-current side with drive train and main battery.Furthermore, conduction losses and voltage/current surge are drastically reduced by ZVS operation with loss-less snubber capacitor in high voltage side as well as the synchronous rectification in low-voltage high-current super capacitor side.