Research on Shield Structure of Inductively Coupled Power Transfer System

In the working process of the loosely coupled transformer in the wireless power transmission(WPT) system, the reliability of the receiving circuit and the transmitting circuit of the system was reduced due to the electromagnetic radiation, which has certain influence on the surrounding life safety. For this reason, four shielding layers' structure and size of loosely coupled transformer were designed, based on the 1kW Inductively Coupled Power Transfer system. By using the finite element simulation software, the shielding effect at the horizontal position 10mm below the transmitting coil and the vertical position 150mm outside it was compared and analyzed respectively. Then the fill ratio of the fan shield was optimized. Finally, a experiment platform of the system was built, and some shielding layers were experimentally verified.