基于磁耦合谐振式无线供电系统的研究与设计

发布时间：2018-11-13 18:37

【摘要】：磁耦合谐振式无线供电技术是一种新型的无线电能传输技术,具有传输效率高、安全性能好的特点,克服了许多传统电能传输方式的不足,适用于中等传输距离,可以为几种便捷式电子产品同时充电。该技术可以降低充电设备的成本、有利于环境保护,因而可以应用许多领域,为现代高科技发展时代和人们的生活带来极大的方便。因此磁耦合谐振式无线供电技术的研究具有重要的学术意义和实用价值。本文详细分析了磁耦合谐振式无线供电系统的工作原理和系统结构,研究了作为磁耦合谐振式无线供电系统传输媒介的近区磁场。在此基础上,分析了磁耦合谐振式无线供电系统耦合模型。重点研究了无线供电系统的传输特性,影响系统传输特性的因素有：线圈参数、回路品质因数、耦合线圈的互感系数、系统的谐振频率等。在理论上对不同匝数线圈在不同谐振频率和距离下对系统传输特性的影响进行了分析,得到最优线圈匝数,最佳耦合距离和谐振频率。对无线供电系统进行了整体设计,包括发射端电路、耦合线圈、接收端电路的设计。对发射端高频逆变器电路进行选型,计算阻尼吸收电路参数；对接收端整流电路、滤波电路、稳压电路进行了具体设计和参数计算；对耦合线圈进行了优化设计；给出了无线供电系统结构。对无线供电系统进行了实验分析,以验证基于磁耦合谐振式无线供电系统的有效性。对系统测试结果表明了无线供电系统设计的合理性。驱动器输入输出波形、逆变器输出和发射线圈波形、空载电压波形、能量传输波形、整流电路输出波形、负载波形均满足设计要求。对耦合线圈在不同距离下进行了实际实验,验证了理论推导的正确性。频率优化实验表明所设计的无线供电系统当频率在一定范围内变化时,系统仍能稳定工作。电源电压变压实验表明,增加电源电压,能够有效地提高系统的效率和接收功率。综合实验表明,本文所设计的无线供电系统具有传输效率高、稳定等特点。
[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.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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