Analysis and design of magnetic coupling structure in wireless power transmission system

Wireless power transfer (WPT) technology are hot topic in current researches in SMPS. This paper focuses on the structure of magnetic coupling system, which regarded as the most significant part in WPT system. A new magnetic structure with good position robust and low flux leakage to nearby space was proposed comparing to the traditional spiral structure. The simulation results, magnetic evaluation results and test results verified the proposed magnetic structure is more suitable for the cases in which the receive devices could offset horizontally.