基于电磁谐振耦合无线能量传输系统分析与设计

发布时间：2018-12-31 10:15

【摘要】：自从电能大规模应用以来,电能的传输一直都采用有线传输。随着各种用电设备的增加,各种电线和充电线路杂乱无章、电线间的接触故障和接触火花等导致有线传输的缺点越来越多;另一方面,各种电动汽车充电问题、电气化铁路供电问题、物联网的大规模应用以及矿井下不适合有线供电的需求增多,导致人们开始寻找新的电能传输方式。迄今为止,电能的无线输送方式分为三种:电磁谐振耦合、电磁感应和微波方式。本文通过比较三种传输方式的优缺点,确定以电磁谐振耦合式无线能量传输为研究对象。磁谐振耦合能量传输范围仅限于磁场的近场,与微波和磁感应传输方式比较,磁谐振耦合效率适中、距离适中、功率适中。本文在理论分析的基础上,进行了无线能量传输系统设计,并通过制作实验装置进行了实验验证。首先从电磁谐振耦合的机理上进行梳理,从理论上分析了电路的电磁谐振性质和耦合性质;推导了功率和效率的计算表达式,从式中可以得到频率、直流电源电压、耦合系数、线圈特性、线圈之间距离和负载特性等对能量传输的影响,得出了最大功率和最大效率传输条件。然后对无线能量传输系统进行了系统设计,从理论上计算了发射、接收电路参数,利用电磁场仿真软件FEKO、ADS、数学分析工具Matlab等对发射、接收电路进行了仿真计算,将仿真数据与理论数据分析比较,确定了发射、接收线圈的制作参数。最后设计制作了发射线圈、开关电路、驱动电路、信号源和低压电源,通过实际测量数据,对影响磁谐振耦合能量传输的制约条件逐个进行分析,验证无线能量传输的可行性。根据实验所得数据,分析了存在问题,提出了增加中继线圈来提高能量传输的措施,并从实验中验证了方案的可行性,实现了电能的小功率无线传输。
[Abstract]:Since the large-scale application of electric energy, the transmission of electric energy has always been wired transmission. With the increase of various electrical equipment, various wires and charging lines are chaotic, and the contact faults and sparks between the wires lead to more and more shortcomings of wired transmission. On the other hand, a variety of electric vehicle charging problems, electrified railway power supply problems, the large-scale application of the Internet of things and the increase of the demand for underground coal mine unsuitable for cable power supply, people began to look for a new mode of power transmission. Up to now, there are three wireless transmission modes of electric energy: electromagnetic resonance coupling, electromagnetic induction and microwave. By comparing the advantages and disadvantages of the three transmission modes, the electromagnetic resonance coupled wireless energy transmission is chosen as the research object in this paper. The magnetic resonance coupling energy transmission range is limited to the near field of the magnetic field. Compared with microwave and magnetic induction transmission mode, the magnetic resonance coupling efficiency is moderate, the distance is moderate, and the power is moderate. Based on the theoretical analysis, the design of wireless energy transmission system is carried out, and the experimental device is made to verify it. Firstly, the mechanism of electromagnetic resonance coupling is combed, and the electromagnetic resonance property and coupling property of the circuit are analyzed theoretically. The expressions of power and efficiency are derived. The effects of frequency, DC power supply voltage, coupling coefficient, coil characteristics, distance between coils and load characteristics on energy transmission are obtained. The transmission conditions of maximum power and maximum efficiency are obtained. Then the wireless energy transmission system is designed, the parameters of the transmitting and receiving circuits are calculated theoretically, and the transmitting and receiving circuits are simulated and calculated by the electromagnetic field simulation software FEKO,ADS, mathematical analysis tool Matlab. The simulation data are compared with the theoretical data, and the fabrication parameters of the transmitting and receiving coils are determined. Finally, the transmitting coil, switching circuit, driving circuit, signal source and low-voltage power supply are designed and manufactured. Through the actual measurement data, the constraints affecting the magnetoresonance coupling energy transmission are analyzed one by one to verify the feasibility of wireless energy transmission. Based on the experimental data, the existing problems are analyzed, and the measures of increasing the trunk coil to improve the energy transmission are put forward. The feasibility of the scheme is verified in the experiment, and the low power wireless transmission of electric energy is realized.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

【参考文献】