磁耦合谐振式无线电能传输系统传输功效的优化与研究

发布时间：2018-12-31 12:21

【摘要】：无线电能传输技术使人们对于电能的传输方式有了新的追求。由于传统有线输电方式存在着磨损、老化所带来的安全隐患,尤其在医疗领域、水下和矿井等特殊场合有线输电方式存在着诸多弊端,因此,迫切需要人们研究更为便捷的无线输电方式。相对于电磁感应式无线电能传输技术,磁耦合谐振式无线电能传输技术具有传输距离相对更远、传输效率较高等优势,迅速成为近年来国内外科研机构的研究热点。然而,实现更大功率更高效率更远距离的无线电能传输目的成为阻碍无线电能传输技术快速发展的瓶颈问题。针对此问题,首先本文介绍了无线电能传输技术的发展背景,对比了三种主流的无线电能传输方式的优缺点和应用领域,分析了无线电能传输技术的国内外研究现状;其次,利用耦合模理论阐述了磁耦合谐振式无线电能传输系统的传输机理,采用电路理论建立了磁耦合谐振式无线电能传输系统的电路模型,对电路模型中各个回路的电流与系统传输效率以及负载接收功率进行了解析计算;然后,阐述了确定磁耦合谐振式无线电能传输系统谐振频率的方法,仿真分析了磁耦合谐振式无线电能传输系统的频率分裂现象。通过对谐振器散射参数的仿真计算,研究分析了频率分裂对系统传输性能的影响,确定了系统的临界耦合状态、过耦合状态和欠耦合状态,分别提出了基于系统功率优化与系统效率优化的频率匹配策略;接着,分析了谐振器品质因数、耦合系数、空间位置以及谐振线圈的组合结构等对系统功效的影响,确定了负载获得最大功率的传输距离。而且,分别提出了基于系统功率优化和系统效率优化的负载匹配策略;最终,通过搭建实验样机对上述一系列基于系统功率优化与效率优化的策略方法进行了验证,并且设计了一辆小功率的无线供电轨道小车,达到了小车在行驶中供电的目的。本文为解决磁耦合谐振式无线电能传输系统传输功率与系统效率的优化问题提供了一定的理论支撑。
[Abstract]:Radio energy transmission technology makes people have a new pursuit for the mode of transmission of electric energy. Because the traditional cable transmission mode has many disadvantages, such as wear and tear and aging, especially in the medical field, underwater and mine, etc., the cable transmission mode has many disadvantages. There is an urgent need for people to study more convenient wireless transmission methods. Compared with the electromagnetic induction radio energy transmission technology, the magnetic coupling resonant radio energy transmission technology has the advantages of far distance and high transmission efficiency, so it has become the research hotspot of the domestic and foreign scientific research institutions in recent years. However, the realization of radio energy transmission with higher power, higher efficiency and longer distance becomes a bottleneck problem that hinders the rapid development of radio energy transmission technology. Aiming at this problem, firstly, this paper introduces the development background of radio energy transmission technology, compares the advantages and disadvantages of three mainstream radio energy transmission methods and their application fields, and analyzes the current research situation of radio energy transmission technology at home and abroad. Secondly, the transmission mechanism of the magnetically coupled resonant radio energy transmission system is expounded by using the coupling mode theory, and the circuit model of the magnetic coupling resonant radio energy transmission system is established by using the circuit theory. The current, system transmission efficiency and load receiving power of each circuit in the circuit model are calculated analytically. Then, the method of determining the resonant frequency of the magnetically coupled resonant radio energy transmission system is described, and the frequency splitting phenomenon of the magnetic coupling resonant radio energy transmission system is simulated and analyzed. By simulating the scattering parameters of resonator, the influence of frequency splitting on the transmission performance of the system is studied and analyzed, and the critical coupling state, over-coupling state and under-coupling state of the system are determined. The frequency matching strategy based on system power optimization and system efficiency optimization is proposed respectively. Then, the effects of the resonator quality factor, coupling coefficient, space position and the combined structure of the resonant coil on the efficiency of the system are analyzed, and the transmission distance of the maximum power of the load is determined. Furthermore, load matching strategies based on system power optimization and system efficiency optimization are proposed respectively. Finally, a series of strategy methods based on system power optimization and efficiency optimization are verified by building an experimental prototype, and a small power wireless power supply rail trolley is designed to achieve the purpose of power supply while the vehicle is running. This paper provides a theoretical support for the optimization of transmission power and system efficiency of the magnetic coupling resonant radio transmission system.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM724

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