中文摘要：

电动汽车以其显著的节能减排优势成为全球汽车工业的主要发展方向之一.车载充电机是电动汽车 的重要组成部分,作为电动汽车动力电池与电网之间的接口,高效率是其最重要的技术指标,同时还应减小其 对电网的谐波污染.设计的车载充电机采用 AC/DC到 DC/DC的两级隔离式电路结构：前级采用基于单周期控 制的单相 Boost-APFC电路,后级是移相全桥 ZVZCS变换器,同时副边辅助电路采用由电容和二极管组成的新 拓扑结构,可以进一步提高系统效率.另外,提出单-双环 充电切换的控制方法,来满足蓄电池的恒压-恒流充电 要求.为验证理论分析的正确性,在 Matlab/Simulink环境下对整个系统进行仿真,并采用 TMS320F2812控制芯 片完成 3 kW的样机实验.

英文摘要：

With significant advantage of energy saving and emissions reduction,electric vehicle（EY） has been one of the main development directions of the global automotive industry. On-board charger is a key component of EY and functions as the interface between EY battery and electric grid. High efficiency is the primary technical index for on-board charger, and so is the less harmonic pollution to the electric grid. In this paper, the two-stage AC/DC and DC/DC circuit structure with isolation is adopted. The first stage uses single phase Boost-APFC circuit with one-cycle control, the second stage is ZYZCS converter with phase-shifted full-bridge control. Meanwhile,the transformer secondary side auxiliary circuit adopts a new topology consists of capacitance and diode to achieve higher efficiency. Then,a control method of single-double loop charge switching is presented to meet vehicle battery constant voltage-current charging requirement. The correctness of theoretical analysis is verified by the entire charging system simulation in Matlab/ Simulink and the experiments of a 3 kW prototype using TMS320F2812DSP control chip.