High-Frequency Effect Analysis and Optimization Design of WPT Magnetic Coupling Mechanism

The efficiency of wireless energy transmission coupling mechanism can be improved to some extent by increasing the operating frequency, but at the same time, the efficiency is reduced due to the influence of the high-frequency effect, so the research and optimization of the high-frequency effect are indispensable. This paper studies the high-frequency characteristics of the magnetic coupling mechanism in regard to the working frequency and the internal resistance of the coil. Theoretical analysis and simulation of skin effect and proximity effect are carried out. On this basis, the impact of skin effect is reduced by means of optimizing the wire material, it is proved that the high-frequency characteristics of the Litz wire are good, and it is more suitable for the wire material of the coupling mechanism. The winding mode of coil is optimized, and it is proved that single and ring winding methods can effectively reduce the effect of proximity effect.