电动汽车LCC型无线充电电路特性分析

摘要

针对电动汽车无线充电输出功率小、传输效率低等缺点,在LCC型补偿拓扑基础上,给出电动汽车无线充电电路模型,得到效率与功率表达式.分析该电路模型传输效率、输出功率随松耦合变压器原副边间距、工作频率和等效负载之间的关系.构建实验样机,实验结果验证与理论分析中电路传输效率随变压器原、副边间距变化趋势的一致性.%Aiming for low transmission efficiency,small output power and other shortcomings of wireless charging system,the electric vehicle wireless charging circuit model was established to obtain the efficiency and power of expression based on LCC compensation topology. The relationship between circuit model transmission efficiency, output power and the non-contact power transformer primary,secondary distance,the frequency and load resistance were analyzed. And through structuring the experimental prototype,the theoretical analysis is verified in the wireless power transmission circuit that variation trend of transmission efficiency is consistent with the transformer air-gap ,and the feasibility of the theoretical analysis is proved in the actual circuit.