Aiming at the problems of low efficiency and potential safety hazard of items sorting in traditional logistics industry

a straight line type Halbach array coil structure is proposed

and its structure is optimized

it is applied to wireless charging type sorting system of the robot.This coil can effectively improve the efficiency of power transfer between the coil.Firstly

the mathematical model of magnetic coupling mechanism for wireless power transmission is established

which is used to analyze the relationship between transmission efficiency and magnetic induction intensity

magnetic flux and voltage received by the receiver coil.Then COMSOL finite element simulation software is used to build different magnetic coupling coil structure models

which is used to compared and analyse the influence of magnetic coupling coil structure changes on coil parameters.Finally

a system test platform is built to verify the optimization scheme of the magnetic coupling mechanism.Test results show that the Halbach array coil structure designed has higher transmission efficiency and is more suitable for wireless charging of the sorting robots.