通过三级磁场中继增强距离的感应电能传输系统(英文)

Three-Stages Magnetic Field Repeater for Extending the Range of Inductive Power Transfer

针对生物医电应用要求较远传输距离的需求,本文提出了一种新型的无线电能传输系统结构,在能量发射线圈与能量拾取线圈之间增加了两个能量中继器,每个中继器均包含了两个线圈。比较了中继器采用串联调谐和并联调谐结构的特点,分析了对推挽式全谐振变换器工作频率的影响。搭建了实验系统并进行了相关实验,实验结果证明了本文所提出的系统能够在传输6W额定功率情况下,实现高达85%的传输效率,并使得总的传输距离达到了15cm。

This paper presents a wireless power transfer system including a primary power transmitter, a three stage power repeater with two middle coils, and a power receiver for a biomedical rotary application that needs an extended power transfer range. The characteristics of series tuned and parallel tuned power repeaters are compared, and their operating frequency variations in relation to a push pull full resonant converter are analyzed based on the reflected impedances of the power repeaters. The system is fully built and tested, and the experimental results show that the proposed wireless power supply can transfer 6 watts of power at the rated AC load resistance across a combined range of 15 cm at a power efficiency of 85%.