Research On Power And Efficiency Of Inductively Coupled Power Transfer System

Inductively coupled power transfer system is based on the law of electromagnetic induction. Combined with modern power electronics inverter and capacitor reactive power compensation, the electrical energy from the primary side could effectively transmit to the secondary side through the air gap, which achieved the non-electrical power transmission between the two sides. At present, plenty of researches have been done on the subject both in China and abroad, some countries even put their research into practical applications.This paper focus on figuring out the characteristic of loosely coupled transformer in the inductively coupled power transfer system. Based on the three-dimensional finite element simulation method, parameters of the system are been analyzed and researched to increase its power and transmission efficiency. By analyzing circuit, simulation, and optimization design, the output power and transmission efficiency are improved.In the first place, this paper analyzed the basic working principle of inductively coupled power transfer system in the inductively coupled power transfer system. The simulation model of the loosely coupled transformer is established, and the three-dimensional finite element simulation method is used to calculating the electromagnetic parameters. The experimental platform of the inductively coupled power transfer system is built to evaluate the feasibility of the calculating results. With this method, the variation of the inductances in different air gap, transverse and longitudinal lateral distance of the loosely coupled transformer in inductively coupled power transfer system is studied. The magnetic field parameters are abstracted to the circuit model, so that the primary side and secondary side of the loosely coupled transformer is decoupled. The input power, output power and transmission efficiency of the system is studied at different frequencies in the resonant case. Integrated with the inductances, frequency, the system resistance, and load resistance, the design of inductively coupled power transfer system is considerably optimized.