磁共振无线电力传输接收系统的研究与设计

发布时间：2018-07-08 11:36

本文选题：无线电力传输 + 磁共振耦合　；参考：《河北大学》2014年硕士论文

【摘要】：无线电力传输技术作为二十一世纪最受国际社会关注的技术之一，已经开始进入人们的生活。磁共振耦合无线电力传输技术因其在中距离上实现电能高效传输的特点，吸引了大量相关研究人员进行研究与探索。本文根据耦合模理论对磁共振耦合无线电力传输技术的工作原理及相关特性做了详细的理论分析，推导出了磁共振耦合无线电力传输系统的传输效率、耦合系数、品质因数等参数的计算公式，给出了发射线圈和接收线圈的设计依据，设计并制作了几组线圈，通过实际测试验证了所给依据的合理性。论文着重对磁共振耦合无线电力传输系统的传输特性进行了实验验证。所设计的线圈具有良好的方向性；系统在发射线圈和接收线圈同时发生谐振时，能获得很高的传输效率；存在频率分裂现象，即系统有两个关于中心频率对称的谐振频率，在这两个频率上都能获得最大的传输效率；随传输距离的增加，两谐振频率逐渐向中心频率靠拢，，且在高谐振频率点处的传输效率先增大后减小，而在低谐振频率点处，传输效率逐渐降低。文中提出了磁共振耦合无线电力传输系统的接收电路设计方案。采用二极管桥式整流电路实现射频到直流的转换，完成高频整。根据归一化低通滤波器参数设计出适合系统需求的低通滤波器。完成了实际电路的测试与系统调试，并点亮了1米外的3瓦灯泡。
[Abstract]:Wireless power transmission technology, as one of the most concerned technologies in the 21 century, has begun to enter people's lives. Magnetic resonance coupled wireless power transmission technology has attracted a large number of researchers to study and explore because of its high efficiency power transmission in middle distance. Based on the coupled mode theory, this paper makes a detailed theoretical analysis of the working principle and related characteristics of the magnetic resonance coupled wireless power transmission technology, and deduces the transmission efficiency and coupling coefficient of the magnetic resonance coupled wireless power transmission system. The design basis of transmitting coil and receiving coil is given. Several sets of coils are designed and made. The rationality of the basis is verified by practical test. The transmission characteristics of magnetic resonance coupled wireless power transmission system are verified experimentally in this paper. The designed coil has good directionality, the system can obtain high transmission efficiency when the transmitting coil and the receiving coil are resonant at the same time, and the frequency splitting phenomenon exists, that is, the system has two resonant frequencies about the center frequency symmetry. The maximum transmission efficiency can be obtained at both of these two frequencies. With the increase of transmission distance, the two resonant frequencies are gradually closer to the center frequency, and the transmission efficiency at the high resonant frequency point increases first and then decreases, while at the low resonant frequency point, the transmission efficiency increases firstly and then decreases at the low resonant frequency point. The transmission efficiency is decreasing gradually. In this paper, the receiving circuit design of magnetic resonance coupled wireless power transmission system is presented. Using diode bridge rectifier circuit to achieve RF to DC conversion, complete high-frequency integration. According to the normalized low pass filter parameters, a low pass filter suitable for the system requirement is designed. Completed the actual circuit testing and system debugging, and lit a 3-watt light bulb 1 meter away.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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