Simulation analysis on detachable transformer in contactless electrical energy transmission system

Contactless electrical energy transmission system (CEET) which can work under atrocious conditions realizes contactless transmission between power and loads. It is necessary to improve the efficiency of the detachable transformer, as it plays an important role in the system. Based on the structure and work principle of the system, related parameters are analyzed in this paper. Detachable transformer is designed and simulated using finite element method (FEM). The influence of horizontal and vertical displacement between primary and secondary side on coupling performance of the system is investigated. The coupling rate decreases when the airgap and horizontal displacement increases and the length of airgap has more remarkable influence on coupling rate. The coupling rates result from 2D simulation is a little higher than 3D simulation results.