Design And Study On Two Load Wireless Power Transmission System Based On Electromagnetic Resonance Coupling

Recently, progress in the studies of resonant wireless power transmission pushes rapid development of the wireless power transmission. Compared with magnetic-induction wireless power transmission, the resonant one can reach longer transmission distance and compared with microwave and laser wireless power transmission, the resonant one can pass through barriers to transmit power with less radiation and higher safety. Medium-power wireless power transmission is of great importance in the medium distance.This thesis, by comparing 4 kinds of circuit topology of resonant wireless power transmission system, provides support for the design of circuit experiment. In the simulation software ADS(Advanced Design System), SS(Series-Series)-structure circuit model is contracted. In this thesis, it’s frequency characteristic, load characteristic and distance characteristic are analyzed to provide guidance for the circuit designing. For the multi-load circuit model, the power and efficiency formula are to be deduced to analyze the power and efficiency of load of different places by using Matlab. By comparing bridge inverter circuit with high-frequency power amplifier, Class E power amplifier is chosen as the high-frequency power source of the experimental device, which is able to be emulated in the emulation software Saber in order to optimize the circuit parameter, analyzing the design of the key parameter in the Class E power amplifier. Designing the signal-produced circuit and drive circuit, choosing appropriate switch tube designing PCB, and making and completing the debugging of high-frequency power source are all the procedures of the whole experiment. Transmitting coil and receiving coil are designed to make the corresponding coil.In the last step, the experiment platform is set up for multi-load resonant wireless power transmission to achieve wireless transmission of the power. Meanwhile, with the data actually measured in the experiment, factors influencing the transmission of resonant wireless power have been verified and analyzed, during which two 5-watt LED bulbs are lighted.PCB coil has been designed to solve the problem that ductile coil can change the parameter. Meanwhile, it points out the probability of integration of PCB coil and micro matin of the system. Considering the short distance of transmission, using repeating coil, enlarging the semi diameter of the coil or using solenoid coil as the transmitting terminal to promote transmission distance can achieve more satisfactory result.