| In recent years, as more and more traditional wire transmission can not meet the requirements of many special occasions, because of this benefit making the wireless transmission technology has the rapid development. Wireless transmission technology allows transmission and power supply to revolutionary changes, both to avoid the influence of the wire cable transmission of electrical energy, but also eliminates the need for electronic products for battery-dependent, greatly improving the flexibility of electrical equipment draw power, not only more safe and convenient, but also more beautiful and environmentally friendly. Wireless power transmission technology has many advantages and broad prospects, favored countries researchers. Magnetically coupled resonance wireless power transmission technology with high transmission efficiency, less impact of coil position, etc., suitable for medium-distance wireless power transmission.Domestic and international research community research on magnetically coupled resonance of wireless transmission technology focused on how to improve the system transmission power and transmission efficiency, so that the wireless transmission technology has been rapid development, however the technology is not mature.high-energy, high efficiency, stable transmission of electrical energy still need to invest more in research. It has a close relationship of the two parameters of power and efficiency of transmission characteristics of the system, the relative position of the coil, so the transmission medium.This article firstly introduced the three common wireless transmission technology simply, summed up the advantages and disadvantages, and introduces the development status of magnetically coupled resonant wireless power transmission technology domestic and abroad; For s-s-type electromagnetic coupling resonance wireless power transfer circuit topology are established model of coupled-mode theory and circuit theory model, in-depth understanding of the magnetically coupled resonance theory and working mechanism of wireless transmission technology; then the various factors which affect the transmission characteristics were studied through model analysis with MATLAB, PSpice simulation analysis of the natural frequency coils, mutual inductance and coupling coefficient, affect the transmission distance, load, coil parameters on transmission characteristics, optimum natural frequency power fPout max,optimum power mutual inductance MPout max, optimum power load RPout mas,load optimum efficiency Rηmax,optimum power distance parameters dPout max, provided the basis for system optimization design, optimization and design put forward the corresponding solutions for the needs of different electromagnetic resonant coupling wireless power transmission system.The hardware design of the system to do a detailed introduction and use hardware circuit design of the experimental apparatus; a series of experiments and analysis of experimental data, the factors affecting magnetically coupled resonance of wireless transmission technology transmission characteristics were analyzed to verify. |
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