基于磁耦合谐振的无线电力传输系统特性研究

发布时间：2018-02-08 11:26

本文关键词： 磁耦合谐振无线电力传输非对称半桥逆变 ZVS　出处：《山东大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来,无线电力传输技术由于在特殊场合的广阔应用前景逐渐成为研究热点。在诸多无线电力传输技术中,磁耦合谐振无线电力传输技术与电磁感应和微波等方式相比,具有中等传输距离、传输效率高、对线圈错位不敏感等明显优势。磁耦合谐振无线电力传输技术现已有诸多相关研究成果,但大都为理论化研究且尚未成熟,距离实际应用还有很多关键问题亟待解决,如理论与模型尚不完善、在距离变化和负载变化情况下的性能稳定性、对周围环境的电磁干扰等。磁耦合谐振无线电力传输系统的传输性能,如功率、效率等,会受到诸多因素影响,各因素之间存在复杂的内在联系。针对各个因素对系统传输性能的影响规律,以及因素之间的相互关联规律,目前尚未有较为系统的研究成果,本文在建立磁耦合谐振无线电力传输系统互感模型的基础上,深入分析了各因素对系统的影响,为提高系统传输性能提供了理论基础。本文首先介绍了无线电力传输技术,并对比分析了其中的三种常见技术,总结了磁耦合谐振技术目前国内外的发展现状。建立了基于耦合模理论与电路理论的系统模型,对磁耦合谐振技术的内在能量传输机理进行了深入阐释,并分析了两种模型之间的相通性。在电路互感模型基础上,详细分析了自谐振频率、工作频率、传输距离、负载变动等因素对系统的功率与效率的影响。最后,本文采用非对称半桥逆变电路与矩形传输线圈,设计了自谐振频率约405kHz且能够工作在ZVS状态的无线电力传输硬件系统,成功点亮了50cm外40W的灯泡。为了验证理论分析的正确性,本文进行了实验验证,实验结果与理论分析具有较好的一致性。本文还针对磁耦合谐振技术对障碍物的穿透能力进行了实验研究,证明了传输性能对金属障碍物质较为敏感；而对非金属障碍物则具有较强穿透能力,能量传输不受其影响。
[Abstract]:In recent years, wireless power transmission technology with wide application in special occasions has become a research hotspot. In many wireless power transmission technology, compared to magnetic resonance coupling wireless power transmission technology with electromagnetic induction and microwave etc., with medium transmission distance, transmission efficiency is high, the coil is not sensitive to misalignment and other obvious advantages. The magnetic coupled resonant wireless power transmission technology has many related research results, but most of theoretical research and practical application of the distance is not yet mature, there are many key problems to be solved, such as the theory and the model is not perfect, the performance stability of distance change and load change, the ambient electromagnetic interference.
The transmission performance of magnetic resonance coupling wireless power transmission system such as power, efficiency, will be affected by many factors, there is complex relation between the various factors. The effects of various factors on the transmission performance of the system, related law and between factors, there is no study systematically, based on the establishment of this magnetic coupled resonant wireless power transmission system of transformer model, in-depth analysis of the influence of various factors on the system, provides a theoretical basis for improving the transmission performance of the system.
This paper first introduces the wireless power transmission technology, and comparative analysis of three kinds of common techniques, summarizes the current development status of coupled magnetic resonance technology at home and abroad. The system model is established by coupling mode theory and circuit theory based on the internal energy transfer mechanism of coupled magnetic resonance technology in-depth interpretation, and analysis similarities between the two models. Based on the circuit transformer model, detailed analysis of the self resonant frequency, frequency, transmission distance, influence power and efficiency of load changes and other factors on the system. Finally, this paper uses the asymmetric half bridge inverter circuit with rectangular transmission coil, design a wireless power transmission system hardware self resonant the frequency of about 405kHz and can work in the ZVS state, 50cm 40W successfully lit the lamp. In order to verify the correctness of theoretical analysis, this paper conducts an experiment, experimental results The results are in good agreement with the theoretical analysis.
In addition, the transmission capability of magnetic coupling resonance technology for obstacle is studied in this paper. It is proved that the transmission performance is more sensitive to metal obstacle material, while the non-metallic obstacle has strong penetration ability, and the energy transmission is not affected by it.

【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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