Research On The Design And Transfer Characteristics Of A Magnetic Resonant Coupling Wireless Power Transfer Device

The magnetic resonance coupling wireless power transfer system uses the strong magnetic coupling resonance between the transmitter and receiver to transmit the electric energy,it has good transfer characteristics,it can be used in many special occasions.In this paper,the design and transfer characteristics of the system are studied,the main contents of this paper are as follows:This paper analyzes the working principle of several circuit structures,using the circuit theory to establish the topology structure of four kinds of circuit model,the characteristics of the four topologies are studied by simulation.The mathematical model of the system is also established by using the coupled mode theory,and then analyze the conditions of power to achieve complete exchange.Based on the principle of magnetic coupling resonance,a set of wireless power transfer device is designed,which is used to supply power for 12 V and 10 W bulbs.The experimental device mainly consist of a DC power supply,a high frequency inverter,coupling coils,a matching capacitor and a high frequency rectification circuit.The experimental device successfully lightened the load bulb,and realized the wireless powe transfer.The influence of frequency,resonant frequency,transmission distance,mutual inductance and load impedance on the transfer performance of the system is obtained by MATLAB simulation;The frequency characteristics of the system,the coupling of thecoils,the transmission distance and the penetrability of the system are studied by means of the experimental device.The frequency tracking control methods are studied in this paper.The system can be used to set up different closed loop circuits,which can effectively solve the adverse effects caused by frequency detuning,and ensure the system has better transmission characteristics.In this paper,through the design of the magnetic resonant coupling wireless power tranfer experimental device,the light bulbs are successfully illuminated.The transfer characteristics of the system are studied by simulation and experiment,and the results have some guiding significance for the following research and practice.