电动汽车动态无线充电系统特性的研究

摘要

动态无线充电系统能显著减少电动汽车动力电池的质量与尺寸,具有广阔的应用前景.本文中首先基于分段式多发射导轨方案,建立了原边LCC阻抗匹配网络电动汽车动态无线充电系统的等效电路模型,进而推导出系统功率和效率的表达式;然后搭建实验平台并利用实际系统参数,研究以阻抗匹配网络补偿电容为代表的静态参数和动态无线充电过程中变化的动态互感参数对系统功率和效率特性的影响;最后通过实验对建立的模型和分析得到的结论进行了验证.%Dynamic wireless electric vehicle ( EV) charging system has the advantage of significantly re-ducing the weight and size of power batteries carried by EV with wide application prospects. In this paper, the e-quivalent circuit model for dynamic wireless EV charging system with primary side LCC impedance matching network is established first, based on segmented multi-track scheme, with expressions of system power and efficiency de-rived. Then, an experimental platform is built and the parameters of actual system are used to study the influences of system static parameters, with the compensation capacitor of impedance matching networks as representative, and the dynamic mutual inductance parameters changed in dynamic wireless charging process on the power and efficiency characteristics of system. Finally, experiments are conducted to verify the established model and corresponding anal-ysis conclusions drown.