磁谐振耦合无线能量传输机理及实验装置研究
发布时间：2018-08-02 13:01
【摘要】：磁谐振耦合式无线能量传输技术作为一种新型能量传输技术是近年来国内外科研机构的研究热点。该技术通过谐振线圈在特定工作频率下产生变化的高频磁场。当不同谐振线圈产生的磁场频率相同时,磁场发生共振,形成共振能量传输通道,实现能量的无线传输。相对于传统感应无线能量传输方式,其能量传输距离更远,且传输方向不受限制,因而具有更广阔的应用前景。 本文的研究内容包括磁谐振耦合无线能量传输基本原理分析,小型无线能量传输装置设计,影响能量传输的关键因素分析,系统各级效率分析等。基于上述理论分析,重点研究了一种优化的谐振线圈。 本文首先建立了磁谐振耦合式无线能量传输的数学模型,应用耦合模理论和电路理论的方法分别对系统进行了理论分析和计算,分析了系统的基本工作原理和能量传输通道；并且用MATLAB软件计算了谐振线圈的电压和电流,验证了所建等效电路模型的正确性。 谐振线圈是磁谐振耦合技术中的关键单元。本文比较了常见的平面螺旋型和圆柱型线圈的结构和磁场分布特点,采用平面螺旋型线圈作为谐振线圈。给出了平面螺旋型谐振线圈的一种优化设计方法——传输线模型法,包括结构参数优化设计、等效集总参数建模分析及计算。并将此算法用MATLAB程序实现,计算得出谐振线圈的等效电路参数和谐振频率；设计并制作了两个结构参数完全相同的平面螺旋型线圈,测量了其等效电路参数和本征频率,实测值与程序计算值误差在10%以内。 本文按照磁谐振耦合式无线能量传输的系统设计要点,以及谐振线圈频率、线圈空载品质因数、线圈之间的能量传输效率、系统整体传输效率、系统最远能量传输距离等评价指标,利用所设计线圈完成了一个小型磁谐振耦合式无线能量传输装置,并对该装置的电压电流波形、功率曲线等系统参数和实际工作效率进行了测试和计算,得到了系统能量传输效率与关键影响因素之间的关系曲线。实验表明,该装置在50cm距离下可以隔空点亮15w灯泡,系统整机效率达62%。
[Abstract]:As a new type of energy transmission technology, magnetic resonance coupled wireless energy transmission technology has been a hot research topic in domestic and foreign scientific research institutions in recent years. The technique uses resonant coils to produce a variable high-frequency magnetic field at a particular operating frequency. When the frequency of magnetic field produced by different resonant coils is the same, the magnetic field resonates and forms a resonant energy transmission channel to realize the wireless transmission of energy. Compared with the traditional inductive wireless energy transmission mode, its energy transmission distance is longer, and the transmission direction is unlimited, so it has a wider application prospect. The research contents of this paper include the basic principle analysis of the magnetic resonance coupling wireless energy transmission, the design of the small wireless energy transmission device, the analysis of the key factors affecting the energy transmission, and the analysis of the system efficiency at all levels. Based on the above theoretical analysis, an optimized resonant coil is studied. In this paper, the mathematical model of magnetic resonance coupled wireless energy transmission is established, the coupling mode theory and circuit theory are applied to analyze and calculate the system, and the basic working principle and energy transmission channel of the system are analyzed. The voltage and current of the resonant coil are calculated by MATLAB software, and the correctness of the equivalent circuit model is verified. The resonant coil is the key unit in the magnetic resonance coupling technology. In this paper, the structure and magnetic field distribution characteristics of planar helical coil and cylindrical coil are compared. The planar helical coil is used as resonant coil. In this paper, an optimal design method of planar helical resonant coils, transmission line model method, is presented, including structural parameter optimization, equivalent lumped parameter modeling, analysis and calculation. The equivalent circuit parameters and resonant frequencies of resonant coils are calculated by using MATLAB program, and two planar helical coils with identical structure parameters are designed and fabricated, and their equivalent circuit parameters and intrinsic frequencies are measured. The error between the measured value and the calculated value is less than 10%. In this paper, according to the key points of the system design of the magnetic resonance coupling wireless energy transmission, the frequency of the resonant coil, the quality factor of the coil without load, the energy transmission efficiency between the coils, the overall transmission efficiency of the system are discussed. The farthest energy transmission distance of the system is evaluated. A small magnetic resonance coupled wireless energy transmission device is completed by using the designed coil, and the voltage and current waveforms of the device are given. The system parameters such as power curve and actual working efficiency are measured and calculated, and the relationship between the system energy transmission efficiency and the key factors is obtained. The experiment shows that the device can light 15w light bulb in the distance of 50cm, and the efficiency of the whole system is 62%.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724
本文编号：2159518
[Abstract]:As a new type of energy transmission technology, magnetic resonance coupled wireless energy transmission technology has been a hot research topic in domestic and foreign scientific research institutions in recent years. The technique uses resonant coils to produce a variable high-frequency magnetic field at a particular operating frequency. When the frequency of magnetic field produced by different resonant coils is the same, the magnetic field resonates and forms a resonant energy transmission channel to realize the wireless transmission of energy. Compared with the traditional inductive wireless energy transmission mode, its energy transmission distance is longer, and the transmission direction is unlimited, so it has a wider application prospect. The research contents of this paper include the basic principle analysis of the magnetic resonance coupling wireless energy transmission, the design of the small wireless energy transmission device, the analysis of the key factors affecting the energy transmission, and the analysis of the system efficiency at all levels. Based on the above theoretical analysis, an optimized resonant coil is studied. In this paper, the mathematical model of magnetic resonance coupled wireless energy transmission is established, the coupling mode theory and circuit theory are applied to analyze and calculate the system, and the basic working principle and energy transmission channel of the system are analyzed. The voltage and current of the resonant coil are calculated by MATLAB software, and the correctness of the equivalent circuit model is verified. The resonant coil is the key unit in the magnetic resonance coupling technology. In this paper, the structure and magnetic field distribution characteristics of planar helical coil and cylindrical coil are compared. The planar helical coil is used as resonant coil. In this paper, an optimal design method of planar helical resonant coils, transmission line model method, is presented, including structural parameter optimization, equivalent lumped parameter modeling, analysis and calculation. The equivalent circuit parameters and resonant frequencies of resonant coils are calculated by using MATLAB program, and two planar helical coils with identical structure parameters are designed and fabricated, and their equivalent circuit parameters and intrinsic frequencies are measured. The error between the measured value and the calculated value is less than 10%. In this paper, according to the key points of the system design of the magnetic resonance coupling wireless energy transmission, the frequency of the resonant coil, the quality factor of the coil without load, the energy transmission efficiency between the coils, the overall transmission efficiency of the system are discussed. The farthest energy transmission distance of the system is evaluated. A small magnetic resonance coupled wireless energy transmission device is completed by using the designed coil, and the voltage and current waveforms of the device are given. The system parameters such as power curve and actual working efficiency are measured and calculated, and the relationship between the system energy transmission efficiency and the key factors is obtained. The experiment shows that the device can light 15w light bulb in the distance of 50cm, and the efficiency of the whole system is 62%.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724
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