磁谐振中距离无线电能传输及关键科学问题

阐述了磁谐振中距离无线电能传输的3种方式及可能的物理解释;对磁谐振中距离无线电能传输系统的主要参数,即传输距离、传输效率、传输功率和谐振频率进行分析,指出现阶段可能达到的极限参数。分析表明,传输距离主要受磁谐振耦合无线电能传输原理的限制,系统效率主要受功率放大器效率和传输效率的限制,传输功率的大小主要受电磁环境要求的限制,而谐振频率的选取受传输距离、传输功率、功率放大器和频率管制等的制约。最后对无线电能传输的电磁环境问题进行了分析。

Key Problems of Midrange Wireless Power Transfer via Magnetic Resonances

In this paper, three kinds of magnetic resonant coupling wireless power transfer (WPT) are presented, and their physical models are explained. Additionally, the key parameters of magnetic resonant coupling WPT, which include transfer distance, system efficiency, transfer power and resonant frequency, are analyzed and their possible ultimate values in the state of art are proposed. It can be concluded that the transfer distance is mainly limited by the physical principles of magnetic resonant coupling WPT, the system efficiency mainly limited by the efficiency of power amplifier and transfer efficiency, the transfer power mainly limited by the restrictions of electromagnetic fields (EMFs), and the selection of resonant frequency mainly restrained by transfer distance, transfer power, power amplifier and the regulation of frequency. In the end, the EMF of wireless power transfer is analyzed.