Series–series (SS) and series–parallel (SP) topologies are widely used in resonant inductive coupling wireless power transfer systems for various applications. However, the selection of an appropriate topology to achieve higher output power or higher efficiency is typically difficult because design optimization of the circuit parameters (e.g., characteristic impedance, load resistance, and mutual inductance) for each topology is generally separately discussed using different equivalent circuits with multiple resonance modes. Therefore, the purpose of this study involves proposing a simple strategy to select an appropriate topology. The proposed strategy is based on quasi-duality between the SS and SP topologies that are elucidated from the novel equivalent circuits derived using Lagrangian dynamics. Based on the quasi-duality, the output power and efficiency of the SP topology are calculated via the equivalent circuit of SS topology. Thus, the quasi-duality offers a simple comparison between the SS and SP topologies. The proposed strategy selects an appropriate topology by comparing only the equivalent ac load resistance, which is the ac resistance including the rectifying circuit and the load resistance, the characteristic impedance, and the ac load resistance that achieves the maximum efficiency or maximum output power of the SS topology. Experiments verify the appropriateness and effectiveness of the proposed strategy.

中文翻译：

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基于谐振电感耦合无线电能传输系统串串联和串并联拓扑之间拟对偶性的拓扑选择策略

串串联 (SS) 和串并联 (SP) 拓扑广泛用于各种应用的谐振电感耦合无线电力传输系统。然而，选择合适的拓扑以实现更高的输出功率或更高的效率通常很困难，因为每个拓扑的电路参数（例如，特性阻抗、负载电阻和互感）的设计优化通常使用不同的等效电路单独讨论具有多种共振模式。因此，本研究的目的是提出一个简单的策略来选择合适的拓扑。所提出的策略基于 SS 和 SP 拓扑之间的拟对偶性，这些拓扑是从使用拉格朗日动力学导出的新型等效电路中阐明的。基于拟对偶性，SP拓扑的输出功率和效率通过SS拓扑的等效电路计算。因此，准对偶性提供了 SS 和 SP 拓扑之间的简单比较。所提出的策略仅通过比较等效交流负载电阻来选择合适的拓扑结构，即包括整流电路和负载电阻在内的交流电阻、特性阻抗以及实现最大效率或最大输出功率的交流负载电阻。 SS 拓扑。实验验证了所提出策略的适当性和有效性。所提出的策略仅通过比较等效交流负载电阻来选择合适的拓扑结构，即包括整流电路和负载电阻在内的交流电阻、特性阻抗以及实现最大效率或最大输出功率的交流负载电阻。 SS 拓扑。实验验证了所提出策略的适当性和有效性。所提出的策略仅通过比较等效交流负载电阻来选择合适的拓扑结构，即包括整流电路和负载电阻在内的交流电阻、特性阻抗以及实现最大效率或最大输出功率的交流负载电阻。 SS 拓扑。实验验证了所提出策略的适当性和有效性。