Abstract：In multi-load and multi-coil wireless power transfer (WPT) systems, the magnetic cross-coupling of transmission coils leads to complex system modeling and multi-load constant voltage design. Therefore, this paper proposes a multi-layer isolating scheme to decouple the unexpected coupling between coils. In the proposed isolating scheme, the sandwich isolating scheme, namely Ferrite-Aluminum-Ferrite, is applied to eliminate the magnetic cross-decoupling of the coaxial coils. In addition, the double-layer isolating scheme, namely Ferrite-Aluminum, is used to eliminate the magnetic cross-coupling of non-coaxial coils. Applying the proposed isolating scheme to a six-coil WPT system with three loads, the mutual inductances of the unexpected coupling coils are reduced to less than 6%, while the mutual inductances of the expected coupling coils have certain enhancement. Furthermore, multi-load constant voltage is achieved by using passive compensated network (PCN) in the proposed WPT system. Lastly, the experimental results show that the maximum output voltage deviation of each load in the range of 10~100Ω is no more than 9.3% of its designed value.
卢伟国, 陈伟铭, 李慧荣. 多负载多线圈无线电能传输系统各路输出的恒压特性设计[J]. 电工技术学报, 2019, 34(6): 1137-1147.
Lu Weiguo, Chen Weiming, Li Huirong. Multi-Load Constant Voltage Design for Multi-Load and Multi-Coil Wireless Power Transfer System. Transactions of China Electrotechnical Society, 2019, 34(6): 1137-1147.
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IEEE Transactions on Power Electronics, 2017, 32(4): 3240-3250. 通信作者:卢伟国男,1977年生,博士,博士生导师,研究方向为无线电能传输和电力电子系统及其控制.E-mail: luweiguo@cqu.edu.cn
2019, Vol. 34 
