Both inductive power transfer (IPT) and capacitive power transfer (CPT) have shown great potential in various applications, such as consumer electronics, industrial automatics, and transportation systems. It is well known the both IPT and CPT are based on the near-field coupling. However, there is no uniform near-field coupling theory for system analysis and design, especially for the coupler model, structure, and coupling mechanism. 1）This research is devoted to explore the duality between the inductive and capacitive couplers, and then build a uniform understanding for near-filed WPT. The research first proposes a uniform model for both kinds of couplers. This model is able to use independent circuit parameter to represent the stored energy and transferred energy. Based on the parameter sensitivity analysis, a uniform compensation theory is then proposed to avoid resonance frequency shift under coupling variation. 2）Meanwhile, this research explores the relationship between the coupler structure and coupler model, based on which the structure duality is discovered and used to develop novel coupler structure. 3） In this research, novel space multiplexing methods are proposed by sharing the coupling space of magnetic field and electric field. These approaches are able to further improve the power transfer capability within limited space. Overall, this research will build a uniform analysis and design methodology for near-field WPT. New coupeler structure and coupling mechanism can be discovered to meet the various application demands.

基于磁场或电场耦合谐振的无线电能传输技术在消费电子、工业自动化和轨道交通等领域应用广泛。两类技术本质上虽然都是近场耦合传能，但是耦合器在电路模型、几何结构、与能量耦合方式上差异明显，缺乏统一的理论指导其分析与设计。本研究旨在探索两类耦合器未知的相似性，形成对近场传能的统一认知，探索新型的耦合结构与方式。1）研究以耦合器电路模型为切入点，建立了统一的近场电路模型，并基于参数的敏感性分析提出了统一的补偿网路设计理论；2）研究通过分析耦合器的电路模型与几何结构的映射关系，巧妙地发现了两类耦合器的结构对偶性，并提出全新的耦合结构设计方法；3）研究还将通过电场与磁场的空间复用实现全新的能量耦合方式，突破单一场传能的限制，提高空间的能量密度。研究结果将形成统一的近场耦合器分析与设计方法，为不同的应用提供更丰富的结构设计方案与能量耦合方式，最终为形成统一的近场无线传能理论打下基础。