A new type of coil structure called pan-shaped coil of wireless charging system based on magnetic resonance

2017 International Conference on New Energy and Future Energy System

Yue, Z.K.^1 ; Liu, Z.Z.^1 ; Hou, Y.J.^2 ; Zeng, H.^1 ; Liang, L.H.^1 ; Cui, S.^1

School of Electrical Engineering, Shandong University, Shandong Province Jinan

250061, China^1

Energy Research Institute, Shandong Academy of Sciences, Shandong Province Jinan

250014, China^2

关键词: Coil structures;    Coupling coefficient;    Magnetic field uniformities;    Radial direction;    Three dimension simulations;    Transmission power;    Transmitting coils;    Wireless charging system;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/93/1/012061/pdf
DOI  :  10.1088/1755-1315/93/1/012061

来源: IOP

【 摘 要 】

The problem that misalignment between the transmitting coil and the receiving coil significantly impairs the transmission power and efficiency of the system has been attached more and more attention. In order to improve the uniformity of the magnetic field between the two coils to solve this problem, a new type of coil called pan-shaped coil is proposed. Three-dimension simulation models of the planar-core coil and the pan-shaped coil are established using Ansoft Maxwell software. The coupling coefficient between the transmitting coil and the receiving coil is obtained by simulating the magnetic field with the receiving coil misalignment or not. And the maximum percentage difference strength along the radial direction which is defined as the magnetic field uniformity factor is calculated. According to the simulation results of the two kinds of coil structures, it is found that the new type of coil structure can obviously improve the uniformity of the magnetic field, coupling coefficient and power transmission properties between the transmitting coil and the receiving coil.