磁谐振式无线电能传输系统谐振器的磁场分析.pdf

20 13 年 电 工 技 术 学 报 Vol.2 8 Sup.1 第28 卷增刊 1 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY 2013 磁谐振式无线电能传输系统谐振器的 磁场分析 黄学良 吉青晶 曹伟杰 谭林林 周亚龙 （东南大学电气工程学院 南京 210096 ） 摘要 对于大功率无线电能传输，其电压、电流相对较高，需要考虑周围磁场强度。文中首 先从等效电路的角度分析了发射与接收端的电流相角关系；然后在得到圆形电流磁场形式的基础 上，将螺旋形谐振器近似等效成圆形电流的叠加，给出磁场的解析式。通过电磁场的有限元仿真， 得出两线圈空间内形成磁场的分布。仿真结果显示磁场主要集中在两线圈之间，且随距离衰减较 大。最后对一个实际工作的系统进行了测试，结果显示两线圈电流谐振时相位相差 90 °，测量得 到的磁场与仿真结果符合的较好。 关键词：无线电能传输 谐振器 磁场强度 仿真 测量 中图分类号：TM154 ；TM46 The Magnetic Field Simulation and Measurement of Resonator in Wireless Power Transmission Based on Magnetic Resonant Coupling Huang Xueliang Ji Qingjing Cao Weijie Tan Linlin Zhou Yalong （Southeast University Nanjing 210096 China ） Abstract For a wireless power transmission in high power, as its high voltage and current, the magnetic field intensity should be considered. Here, firstly, from the angle of equival ent circuit, the phase angle relationship between transmitting terminal and receiving end was discussed. Secondly, we supposed that the spiral coil is approximate equivalent with superposition of single circular ，and then the analytic magnetic field expression of spiral pipe was obtained basing on getting the magnetic field of single circular. Finally, this paper used the electromagnetic finite element simulation to get the magnetic field distribution in the space. The results show that the magnetic field is almost in the space between the coils, and it attenuates faster as the distance becoming longer. In the end, the magnetic field of a working system was measured, the results show t