作者:刘浩，李振杰，田育弘，宋文龙
Authors:LIUHao,LIZhenjie,TIANYuhong,SONGWenlong摘要:无线充电系统作为新型电能传输方式 , 虽然大幅度地改善电能传输的安全性、便捷性和灵活性 ,但是 由于无源元件的参数漂移与配谐误差等因素影响 ,实际应用时通常难以保证系统谐振状态 ,从而限制无线充电系 统的工作性能 。提出 一种采用磁通可控电感的无线充电系统动态调谐方法 ,具备连续可调、功耗较小以及结构简 单等特性 。首先 , 阐释失谐对无线充电系统输出功率的影响 ;其次 , 分析失谐检测电路与磁通可控电感的工 作原 理;最后 ,基于PLECS 电路仿真验证了采用磁通可控可变电感实现系统动态调谐的可行性 , 电容参数变化范围在 10% 以内时保证输出功率恒定。
Abstract:As a new power transmission mode , wireless charging system greatly improves the safety , convenience and flexibility of power transmission. However , due to the influence of factors such as parameter drift and harmonic matching error of passive components , it is usually difficult to ensure the resonance state of the system in practical application , which limits the working performance of wireless charging system. Therefore , this paper proposes a dynamic tuning method of wireless charging system using flux controllable inductor , which has the characteristics of continuous adjustment , low power consumption and simple structure. Firstly , the influence of detuning on the output power of wireless charging system is explained. Secondly , the working principle of detuning detection circuit and flux controllable inductor is analyzed. Finally , based on PLECS circuit simulation , the feasibility of using flux controllable inductor to realize dynamic tuning of the system is verified. When the variation range of capacitance parameters is less than 10% , the output power is guaranteed to be constant.

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