Magnetic Field Shielding Optimization Based on Wireless Charging

For the design of wireless charging magnetic coupling coil, the principle is explained and the loss calculation analysis is carried out, and the loss calculation method of the magnetic coupling coil, magnetic core and shielding plate is analyzed. This paper uses the finite element method to model and design the target parameters of the magnetic coupling mechanism, compare and calculate the mass proportion of each component of the magnetic coupling mechanism, and optimize the magnetic core mass proportion. The magnetic permeability and loss curve of nanocrystalline materials and ferrite materials are compared and analyzed in detail. This paper proposes to use high permeability and low loss nanocrystalline materials to optimize the thickness of the magnetic core. Through the optimization scheme, it can be seen that the quality of the magnetic core is reduced by about 51%, and the transmission efficiency of the magnetic coupling coil remains basically unchanged. Co-simulation has been used to verify the influence of the optimization scheme on the transmission efficiency. The results show that the optimization of the magnetic core does not have a significant impact on the system efficiency, to achieve the intended purpose of the design.