无线电能传输小型局域网络的电磁建模及运行特性分析

Wireless power transfer (WPT) based on magnetic resonant coupling is a novel technology by which non-radiative and mid-range power transfer can be realized via the near field. WPT inevitably leads to a small-scale regional network with a certain amount of transmitters, receivers and repeaters. And nowadays there is a great lack of related analysis approaches because of its high-frequence and near-field features, which are quite different from those of microwave network and industrial frequency AC network. This proposal carries out comprehensive research for key electromagnetical model and power network model via the WPT principles and properties. The direct field-to-network analysis mode with implicit circuit thinking is proposed. The proposal research the time domain discrete geometry method (DGTD) that is suit for unstructual meshes for high- efficiency electromagnetic field computation, and apply DGTD into time-domain field analysis for local area network to establish an accurate electromagnetic network model, and then extract scattering parameters and its sensitiveness based on filed analysis, which can be utilized to guide the network operating performance analysis, such as power spatial and temporal distribution, frequency bifurcation phenomenon, and the impacts of moving and switching of the loads. Hence, the proposal provides robust theoretical analysis method to investigate the availability, reliability and stability of WPT local area network, and eventually promote the application and development of WPT technology in the area of smart home, wireless sensor network, home medical care and so on.

磁谐振式无线电能传输是利用近区磁场进行非辐射性、中距离输电的新型技术，在实际应用中必然存在一定数量供电端、负载端和中继端的区域小规模组网，但其高频、近场特性使得该局域网络与微波网络、工频交流网络等有显著不同的特性，当前缺乏有效的相关分析手段。本项研究从无线电能传输机理及特征出发，开展关键电磁模型、供电网络模型的综合性研究。项目提出隐含“路”的思想、直接从“场”到“网络”的分析模式，即研究适应于非结构化离散网格、高效率的电磁场时域离散几何法，将其应用于局域网络的电磁场时域分析，建立精确的网络电磁模型，并基于场分析提取出散射参数及其敏感度，指导网络电能分配时空、频率分叉、负载移动或投切影响等运行特性的分析，从而为探讨无线供电局域网络中供电有效性、可靠性与稳定性提供理论分析手段，最终促进无线电能传输技术在智能家居、无线传感网络、家庭医疗监护等领域的应用开展与快速发展。

磁谐振式无线电能传输是利用近区磁场进行非辐射性、中距离输电的新型技术，在实际应用中必然存在一定数量供电端、负载端和中继端的区域小规模组网，但其高频、近场特性使得该局域网络与微波网络、工频交流网络等有显著不同的特性，当前缺乏有效的相关分析手段。本项研究从无线电能传输机理及特征出发，开展关键电磁模型、供电网络模型的综合性研究。项目提出隐含“路”的思想、直接从“场”到“网络”的分析模式，即研究适应于非结构化离散网.格、高效率的电磁场时域离散几何法，将其应用于局域网络的电磁场时域分析，建立精确的网络电磁模型，并基于场分析提取出散射参数及其敏感度，指导网络电能分配时空、频率分叉、负载移动或投切影响等运行特性的分析，从而为探讨无线供电局域网络中供电有效性、可靠性与稳定性提供理论分析手段，最终促进无线电能传输技术在智能家居、无线传感网络、家庭医疗监护等领域的应用开展与快速发展。

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