通过分析磁共振耦合系统在低频状态时的耦合系数、谐振频率、线圈内阻等因素对无线电能传输系统传输效率及输出功率的影响,建立了驱动线圈和负载线圈在非谐振状态下的补偿电容与输出功率、传输效率之间的关系,并推导出了优化的补偿电容的简化计算方法.试验结果表明,文中提出的方法在功率优化和效率优化方面是有效的.
In this paper, by analyzing the effects of coupling coefficient, resonant frequency and coil resistance on the transfer efficiency and output power of magnetically-resonant coupling system in low-frequency state, the rela-tionship between the compensation capacitor of drive coil/load coil in non-resonant state and the output power as well as the transfer efficiency is established. In addition, a simplified calculation method of the optimized compen-sation capacitor is proposed. Experimental results show that the proposed method is adaptable and effective in power and efficiency optimization.