基于LCLC-CL的大功率电场耦合式无线电能传输系统

AHigh Power Capacitive Power Transfer System With LCLC-CL Compensation

考虑到电场耦合式无线电能传输(CPT)系统的等效耦合电容通常只有pF数量级,且系统工作频率f直接影响输出功率。因此,CPT系统的额定输出功率往往较小,无法满足电动汽车充电桩等大功率用电需求。针对这一问题,提出了一种大功率CPT系统。该系统基于具有恒压输出特性的LCLC-CL拓扑结构,并且通过函数方程来优化系统参数,降低了耦合机构的驱动电压。在理论分析的基础上,搭建了相应的CPT系统实验平台,其功率传输间距为40 mm,等效耦合电容为31.7 pF。在输出功率为5 kW的情况下,直流到直流的效率为90.07%。实验结果表明,该拓扑传输大功率能量有效且可行。

Considering that the equivalent coupling capacitance of the capacitive power transmission(CPT) system is usually only on the range of pF,and the system operating frequency f directly affects the output power.Therefore,the output power of the CPT system is often low,which cannot meet the demand for high-power electricity such as electric vehicle charging piles.To slove this problem,this paper proposes a high-power CPT system.The system is based on the LCLC-CL topology with constant voltage output characteristics,and the system parameters are optimized through functional equations,which reduces the driving voltage of the coupling mechanism.Based on theoretical analysis,this paper builds a corresponding CPT system experimental platform,the power transmission distance is 40 mm,and the equivalent coupling capacitance is 31.7 pF.When the output power is 5 kW,the DC-DC efficiency is 90.07%.The experimental results indicate that this topology is effective and feasible for transmitting high-power energy.