| Wireless energy transfer system based on magnetic resonant coupling can make it possibleto reliably and flexibly transmit energy between non-contact electromagnetic assembly, usingelectromagnetic technology, high-frequency technique, power electronics technology andcoupling mode theory. Power supply and energy receiver assembly of this system have nophysical connections, so it overcomes many shortcomings brought by traditional energy transfersystem, and it has been opened up a new method for energy transfer. This work has importantscientific significance and research value.Wireless energy transfer technology based on magnetic resonant coupling utilizes theprinciple that two same resonant frequency objects tend to couple while interacting weakly withother off-resonant environmental objects. It has longer transfer distance and higher stability thanthe energy transfer based on electromagnetic inductive coupling, less energy loss and highertransfer efficiencythan microwave energytransfer.This paper mainly studies on the resonant frequency and its influence factor on theresonator in wireless energy transfer system based on magnetic resonant coupling throughsimulation and experiment. The following jobs are executed in this thesis:Based on coupling mode theory, the mode conversion and work efficiency, radiation lossefficiencyand absorption loss efficiency are analyzed.Numerical model of resonator is established and optimized by finite element software.Planar helical resonator is designed and the influence of height, radius and thickness of theplanar helical coil on resonant frequency is analyzed. Cubic film resonator is designed and theinfluence of the width of inner conductor layer on resonant frequencyis analyzed.Experiment of the cubic film resonator is carried out based on the theoretical and simulationanalysis. In the experiment, a light-emitting diode is lit when the distance between transmitterand receiver is within 30cm. |
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