无线充电汽车输能主回路研究与仿真对比

在电动汽车无线电能传输系统中,系统结构和参数直接影响输出功率和传输效率.为了获得较高的输出功率和传输效率,提出了一种串并-串并(SPSP)拓扑结构,基于电路理论分析了结构的输出功率和传输效率,并将该结构与SPS结构相比较.当网络工作在谐振状态时,给出了电路参数的设计方法,针对该传输条件比较了两种结构下的传输功率、效率随着频率、负载阻抗和传输距离的变化关系.仿真结果表明了SPSP结构相对于SPS结构的优越性,以及所提结构的合理性和设计方法的正确性.

Research and Simulation Comparison on Main Loop of Wireless Charging System for Electric Vehicles

The parameters and topology affect the output power and transmission efficiency in the wireless charging system for electric vehicles (EV).In order to obtain the high output power and transmission efficiency,a SPSP(serial-parallel-serial-parallel) topology is proposed.The output power and transmission efficiency of this structure are analyzed based on the circuit theory and the structure is compared with the SPS structure.The design method of the circuit parameters is given when network works in the resonant states.Aimed at this transmission condition,the relations of power and efficiency along with the change of frequency,load and distance between SPSP and SPS structures are studied.The simulations show the superiority of the SPSP structure relative to the SPS structure,and the rationality of the proposed structure and the correctness of the design method.