Aiming at the problems of heavy shielding layer and temperature rise of magnetic coupling structure in sensor wireless power transfer system a gradual shielding layer structure applied to sensor wireless power transfer system is proposed.The application of gradual change shielding layer can improve the flexibility of the system and reduce the interference of temperature rise on sensor performance.The traditional ring shielding layer can not only improve the efficiency

but also reduce the flexibility of the system and increase the temperature rise of the magnetic coupling structure.Through the simulation

the transmission efficiency

magnetic shielding effect and temperature distribution of the system with gradient shielding layer and ring shielding layer are compared.The results show that the system efficiency with gradient shielding layer is reduced by 15 % compared with the system with ring ferrite

but the weight of magnetic coupling structure is reduced by 43 %; the stable temperature rise of magnetic coupling structure with gradient shielding layer is reduced by 17 %

and the temperature distribution is more uniform

which has higher flexibility and security.