中文摘要：

多单机充电模块并联运行方式在充电后期或是在给电池容量较小的电动汽车充电时，各充电模块均处于轻载状态，且充电电源效率低下，谐波污染严重．为此，文中研制了一款基于DSP4-CPLD的ZVZCS大功率电动汽车充电电源模块，搭建了输出功率可达288kW（600V／480A）的实验平台，并提出了一种新型的并联控制策略，该控制策略确保始终以最少的充电模块提供电动汽车所需的充电电流（电压）．实验结果表明：单机运行时，充电电源的效率在满载时最高可达96．5％；多单机并联运行时，运用上述控制策略可使充电电源效率始终保持在90．0％以上．

英文摘要：

When multiple charging modules operate in parallel, there exists such problems as low efficiency, serious harmonic pollution and light load in the later charging stage or in the case of charging electric cars with smaller battery capacity. In order to solve this problem, a ZVZCS high-power charging power supply module for electric ve- hicles is developed based on DSP ＋ CPLD, and an experiment platform with an output power of 288 kW （600 V/ 480 A） is constructed. Then, a novel parallel control strategy is proposed to ensure the charging current （voltage） for electric vehicles with the least charging modules. Experimental results show that, when a single module runs, the charging power efficiency is up to 96.5 % under a full load ; and that, when multiple modules runs in parallel, the charging power efficiency always maintains at above 90.0% , which means that the proposed parallel control strategy is correct and feasible.