电场耦合无线电能传输系统耦合机构研究

发布时间：2018-05-24 01:50

本文选题：无线电能传输 + 电场耦合　；参考：《重庆大学》2014年硕士论文

【摘要】：电场耦合电能传输（ECPT）技术作为无线电能传输技术的一种，因其独特的优势得到了越来越多国内外科研机构和政府的重视。该技术综合利用现代电力电子技术、微电子技术、电场仿真等技术，借助现代控制理论和方法，实现电能的无线传输。耦合机构作为ECPT系统的核心部件，其结构、参数与特性直接关系到系统的灵活性、传输功率、效率以及整个系统的性能。目前关于ECPT耦合机构的研究已经取得一定的进展，但是仍然存在灵活度差，传输功率及效率低等缺点。本文针对灵活度差的问题，提出了一种新型的耦合机构，并对其进行了优化，此外，为了提升系统功率和效率，分别对耦合机构电介质、电极材料、厚度进行了研究。首先，对ECPT耦合机构的国内外现状进行了研究，详细分析了几种典型的耦合机构，并基于电磁场仿真软件Maxwell建立了各自的仿真模型，对各自的电场分布进行了仿真分析，总结了这几种典型耦合机构的特点以及应用场合。其次，针对目前ECPT耦合机构普遍存在的灵活性不足的问题，提出了新型圆盘耦合机构。在耦合面积确定的情况下，以等效耦合电容最大化为目标对其进行了参数优化。在此基础之上，研究了拾取端与发射端错位情况下的交叉耦合，给出了偏移距离在一定范围内，耦合机构的输出输入电压比关于偏移距离的函数表达式，并与传统圆盘式耦合机构进行了对比分析。另外，在对该耦合机构进行了电场仿真分析的基础之上，提出了一种对拾取电极进行边缘倒角以优化耦合机构电场分布的方法。对于ECPT耦合机构的功效提升，本文首先对电介质的主要参数进行了分析；对于两种具有典型代表的电介质空气和PZT，，分析了各自的最大输出电压、工作频率范围，以及介质损耗；讨论了混合介质的等效耦合电容；对电极的厚度以及材料进行了简要的分析。以上分析可为耦合机构的工程设计提供一定的理论指导。最后基于Matlab/Simulink仿真平台，建立了仿真模型，针对新型圆盘耦合机构处于完全耦合、偏移距离1.5以及偏移距离2三种情况分别对系统进行了仿真分析。在理论研究以及仿真分析的基础之上，搭建了实验装置，给出了实验结果，并进行了实验分析。
[Abstract]:As a kind of radio energy transmission technology, electric field coupled power transmission (ECPT) technology has been paid more and more attention to by scientific research institutions and governments at home and abroad because of its unique advantages. This technology synthetically utilizes modern power electronics technology, microelectronics technology, electric field simulation technology and so on, and realizes the wireless transmission of electric energy with the aid of modern control theory and method. As the core component of ECPT system, the structure, parameters and characteristics of coupling mechanism are directly related to the flexibility, transmission power, efficiency and performance of the whole system. At present, some progress has been made in the study of ECPT coupling mechanism, but there are still some shortcomings such as poor flexibility, low transmission power and efficiency. In order to improve the power and efficiency of the system, a novel coupling mechanism is proposed and optimized. In addition, the dielectric, electrode material and thickness of the coupling mechanism are studied respectively in order to improve the power and efficiency of the system. Firstly, the current situation of ECPT coupling mechanism at home and abroad is studied, several typical coupling mechanisms are analyzed in detail, and their simulation models are established based on electromagnetic field simulation software Maxwell, and their electric field distribution is simulated and analyzed. The characteristics and applications of these typical coupling mechanisms are summarized. Secondly, a new type of disk coupling mechanism is proposed to solve the problem of lack of flexibility of ECPT coupling mechanism. When the coupling area is determined, the parameters are optimized to maximize the equivalent coupling capacitance. On this basis, the cross-coupling between the pickup and the transmitter is studied, and the functional expression of the output input voltage ratio of the coupling mechanism in a certain range of offset distance is given. It is compared with the traditional disk coupling mechanism. In addition, on the basis of the electric field simulation analysis of the coupling mechanism, a method of optimizing the electric field distribution of the coupling mechanism by using the edge chamfering of the pickup electrode is proposed. For the efficiency improvement of ECPT coupling mechanism, the main parameters of dielectric are analyzed firstly, the maximum output voltage, operating frequency range and dielectric loss of two typical dielectric air and PZT are analyzed. The equivalent coupling capacitance of the mixed medium is discussed, the electrode thickness and material are analyzed briefly. The above analysis can provide some theoretical guidance for the engineering design of coupling mechanism. Finally, based on the Matlab/Simulink simulation platform, the simulation model is established. The system is simulated and analyzed in three cases: the new disk coupling mechanism is fully coupled, the offset distance is 1.5 and the offset distance is two. On the basis of theoretical research and simulation analysis, the experimental device is built, the experimental results are given, and the experimental analysis is carried out.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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