A Mutual Inductance Approach for Optimization （优化的互感系数的方法）.pdf

2014 Texas Symposium on Wireless and Microwave Circuits and Systems, Waco, TX April 4 2014 A Mutual Inductance Approach for Optimization of Wireless Energy Transmission Minh Quoc Nguyen, Peter Woods, Zachariah Hughes, Young-Sik Seo, Smitha Rao, and J.-C. Chiao Electrical Engineering Department, The University of Texas at Arlington, Texas, USA Abstract—This work introduces a new approach of optimizing ` the efficiency of a wireless power transmission system in terms of L M L2 M I 1 1 I2 mutual inductance. A circuit model was developed in PSpice to simulate the effect of mutual inductance by inductive coupling on V M V power transfer efficiency. Experiments were conducted at 1.3 1 2 MHz with variations of distance between coils and coil sizes to change the mutual inductance in the equivalent circuit. Experimental results agreed well with the simulation model. The optimal mutual inductance to reach maximum power transfer (a) ` efficiency for the inductive coupling system driven by a class-E amplifier was identified with respect to different coil sizes and 2