基于dsPIC33E的电动汽车充电机的研究与设计

摘要

设计了一种适合于混合动力汽车充电的充电系统，输入为单相交流市电，为了满足相应的国家标准和充电机的功能需求，采用了AC/DC和DC/DC相结合的拓扑结构作为充电机的主拓扑，并利用低成本控制器dsPIC33E进行控制。在对上述主电路拓扑的工作原理进行分析的基础上，给出了部分关键参数的设计方法，并分别设计了前后级电路的控制策略。为了防止在后级DC/DC电路输出模式切换时引起振荡而设计了一种切换方法。最后在理论分析的基础上进行了仿真和实验研究，仿真和实验结果验证了所设计的充电机的可行性。实际测试中实验样机的输入功率因数达到98%以上，且能获得稳定性、动态性良好的输出。%A kind of charging system,which is suitable for hybrid vehicle,is designed. The input of the prototype is single phase AC power. In order to meet corresponding national standards and functional requirments of chager ,a circuit structure combined with AC/DC and DC/DC is adopted as the primary topology of the chager ,and the low cost MCU dsPIC33E is used. The design method of several key parameters and the corresponding control strategies are given based on the analysis of the principle of the main circuit topology which mentioned above. A switching method is presented in order to prevent oscillation caused by the switching of the rear stage DC/DC output mode. Fi⁃nally,simulation and experiments are implemented based on the theoretical analysis,the simulation and experi⁃ments results verify the feasibility of the design of the novel vehicle charger. The actual test input power factor of the prototype is more than 98%,and the good stability and dynamics of the outputs are obtained.