In the magnetic resonant wireless power transfer (WPT) technology, system topology is the main factor that determines the WPT characteristics of the system, and recently, various system topologies based on various composite resonant circuits are being applied in WPT applications. This paper groups the composite resonant circuit-based WPT systems into one family and conducts a comprehensive investigation on their topologies and characteristics. First, characteristics of the composite resonant circuits, which are the fundamental circuits of transmitter and receiver of these systems, are investigated; in the process, a calculation method of resonant frequency, current ratio, and quality factor of these circuits are presented and the characteristics of these parameters are clarified. Second, based on that, the composite resonant circuit-based WPT systems are investigated. Possible topologies of these systems are explored and an equivalent system model of these systems is proposed. Based on that, characteristics evaluation expressions of these systems are derived and the optimal design guide of these systems is discussed. Finally, experimental prototypes are constructed and the proposed theory is verified by experiment results.

中文翻译：

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基于复合谐振电路的无线电力传输系统的综合研究

在磁谐振无线电力传输（WPT）技术中，系统拓扑结构是决定系统WPT特性的主要因素，最近，基于各种复合谐振电路的各种系统拓扑结构正在WPT应用中得到应用。本文将基于复合谐振电路的 WPT 系统归为一类，并对其拓扑结构和特性进行了全面调查。首先，研究了作为这些系统的发射机和接收机的基本电路的复合谐振电路的特性；在此过程中，给出了这些电路的谐振频率、电流比和品质因数的计算方法，并阐明了这些参数的特点。其次，在此基础上，研究了基于复合谐振电路的 WPT 系统。探索了这些系统的可能拓扑结构，并提出了这些系统的等效系统模型。在此基础上，推导了这些系统的特性评价表达式，并讨论了这些系统的优化设计指南。最后，构建了实验原型，并通过实验结果验证了所提出的理论。