基于磁耦合諧振式無線供電系統(tǒng)的研究與設(shè)計
[Abstract]:Magnetic coupling resonant wireless power supply technology is a new type of radio energy transmission technology, which has the characteristics of high transmission efficiency and good security performance. It overcomes the shortcomings of many traditional power transmission modes and is suitable for medium transmission distance. Several convenient electronic products can be charged at the same time. This technology can reduce the cost of charging equipment and is beneficial to environmental protection, so it can be applied in many fields and bring great convenience to modern high-tech development era and people's life. Therefore, the research of magnetic coupling resonant wireless power supply technology has important academic significance and practical value. In this paper, the working principle and system structure of the magnetic coupling resonant wireless power supply system are analyzed in detail, and the near region magnetic field which is used as the transmission medium of the magnetic coupling resonance type wireless power supply system is studied. On this basis, the coupling model of magnetic coupling resonant wireless power supply system is analyzed. The transmission characteristics of wireless power supply system are mainly studied. The factors influencing the transmission characteristics are: coil parameters, loop quality factor, mutual inductance coefficient of coupling coils, resonance frequency of the system, and so on. In this paper, the influence of different turns on the transmission characteristics of the system at different resonant frequencies and distances is analyzed theoretically, and the optimal number of coils, the optimum coupling distance and the resonant frequency are obtained. The wireless power supply system is designed, including transmitter circuit, coupling coil and receiver circuit. The parameters of the damping absorption circuit are calculated, the rectifier circuit, filter circuit and voltage stabilizer circuit are designed and calculated, and the coupling coil is optimized. The structure of wireless power supply system is given. The experimental analysis of wireless power supply system is carried out to verify the effectiveness of the wireless power supply system based on magnetic coupling resonance. The test results show that the design of wireless power supply system is reasonable. Driver input and output waveform, inverter output and transmit coil waveform, no-load voltage waveform, energy transmission waveform, rectifier circuit output waveform, load waveform all meet the design requirements. Experiments on coupling coils at different distances have been carried out to verify the correctness of the theoretical derivation. Frequency optimization experiments show that the designed wireless power supply system can work stably when the frequency varies within a certain range. The power supply voltage conversion experiment shows that increasing the supply voltage can effectively improve the efficiency and the receiving power of the system. Comprehensive experiments show that the wireless power supply system designed in this paper has the characteristics of high transmission efficiency and stability.
【學(xué)位授予單位】:東北大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM724
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