Optimization Design of Anti-offset of PCB Koch Snowflake Coil in Wireless Power Transfer System
摘要
At present, in order to reduce the positioning accuracy requirements of wireless power transmission (WPT) system, improving the anti-migration of magnetic coupling mechanism has become a research focus. In this paper, Koch Snowflake coil is proposed as the transceiver coil. Firstly, Koch Snowflake coil is optimized, and then the anti-bias performance of Koch Snowflake coil and circular coil is compared by finite element simulation. Through simulation analysis, it can be concluded that under the condition of the same coupling coefficient retention rate, the larger the area of the coil, that is, the stronger the anti-bias ability of the coil. Finally, the simulation results are verified by experiments. The results show that Koch coil has better coupling coefficient and anti-bias performance than circular coil in the range of offset distance. And with the increase of the offset distance, the reverse offset tends to be the same. The above results confirm the validity of the simulation results.