磁耦合谐振式电动汽车无线充电桩的电磁特性研究

针对电动汽车无线充电桩工作过程中的复杂电磁环境问题,研究了磁耦合谐振式无线充电桩逆变部分和耦合线圈的电磁特性. 给出了磁耦合谐振式线圈电场强度的理论推导,利用FEKO仿真软件对磁耦合线圈进行建模,并对其电场和磁场强度进行了分析,发现线圈的电场和磁场分布呈现一定对称性,且对称性在电场中更明显; 在发射线圈的圆心处,电场和磁场都达到峰值水平; 从发射线圈到接收线圈,电磁场呈先减小后增大的趋势.

Study on Electromagnetic Characteristics of Magnetically CoupledResonant Wireless Charging Piles for Electric Vehicles

Aiming at the complex electromagnetic environment in the working process of wireless charging piles for electric vehicles,the paper studies the electromagnetic characteristics of the inverting part and the coupling coil of the magnetic coupling resonant wireless charging pile,gives the theoretical derivation of the electric field strength of the magnetically coupled resonant coil,models the magnetic coupling coil by FEKO simulation software,and analyzes the electric and magnetic field strengths. Findings can be obtained that the electric field and magnetic field distribution of the coil exhibit a certain symmetry,and that the symmetry is more obvious in the electric field. At the center of the transmitting coil,both electric and magnetic fields reach peak levels. From the transmitting coil to the receiving coil,the electromagnetic field first decreases and then increases.