磁耦合谐振式无线电能传输系统功效同步研究

发布时间：2018-06-30 06:22

  本文选题：磁耦合谐振 + 最佳谐振频率　； 参考：《重庆大学》2017年硕士论文

【摘要】：近年来,耦合谐振传输技术因其效率高、对环境和人体安全危害小,以及中等传递距离等优点而得到了快速的发展,并存在着广阔的应用前景。虽有众多学者对无线能量传输技术作了相关研究,取得了一系列不错的成果,但整个系统最基本、最关键的问题却没能解决,甚至很少被业界所提及,那就是关系到系统工作性能的功效同步问题。本文致力于研究磁耦合谐振式无线电能传输系统在输出最大功率的同时系统传输效率亦最大,即功效同步,实现无线电能传输系统的最佳传输,包括磁耦合传输子系统及其高频供电电源系统的整体输出功率和效率同步达到最大值。为解决该问题,首先利用集中参数的电路互感理论对两线圈结构中的串串型(Series Series,SS)拓扑系统进行了建模分析,创新性地定义了功效同步因数,总结了功效同步实现的理论条件。在功效同步因数ξ=1与ξ≠1两类不同情况下,采用Math CAD仿真软件分析了功率与效率关于负载的变化关系,有效证明了系统功率与效率同步的可能性。此外,分析推导出该理论同样适合于非纯阻性负载。SS系统研究结果表明,该结构系统虽能实现传输效率与传输功率的协同工作,但该系统功效同步负载及有效负载都较小,难以适应较大负载。为扩大系统功效同步负载及有效负载,接着以两线圈中的串并型(Series Parallel,SP)拓扑系统为研究对象,建模分析中发现,系统参数满足ωC2RL=1时,可极大简化分析过程。与SS系统相比,其功效同步负载及有效负载均有所提高,但传输效率与传输功率却降低了。考虑到插入中继线圈可有效提升系统效率的特点,于是对单中继线圈系统进行功效同步分析,研究结果表明该系统亦可实现功效同步,并且系统效率和功率都有一度程度的提高,与SS和SP系统相比,此结构系统更适合较大阻值的负载。通过对系统最佳频率影响因素的研究分析,进一步验证了该理论的正确性。为使系统获得更高的传输效率和功率,对比研究了多种功率放大器,本文最终选用经典E类功放并制成系统功率源。最后,通过搭建无线电能传输实验平台,对SS结构及单中继线圈系统功效同步理论进行了实验验证。实验结果表明:两线圈SS结构工作频率为1.312 MHz时,系统刚好达到功效同步状态,此时传输效率高达86.7%,功率约为4.01 W;单中继线圈系统传输效率最高约为89.5%,功率达4.31 W,对应的功效同步负载约为64.8Ω。
[Abstract]:In recent years, coupling resonant transmission technology has been developed rapidly because of its high efficiency, small harm to environment and human safety, and medium transmission distance, and has a broad application prospect. Although many scholars have made relevant research on wireless energy transmission technology and achieved a series of good results, the most basic and critical problems of the whole system have not been solved, or even rarely mentioned by the industry. That is related to the performance of the system to synchronize the effectiveness of the problem. This paper is devoted to the study of the maximum power output and the maximum transmission efficiency of the magnetically coupled resonant radio energy transmission system, that is, the efficiency synchronization, and the realization of the optimal transmission of the wireless power transmission system. The overall output power and efficiency of the magnetic coupling transmission subsystem and its high frequency power supply system are up to the maximum. In order to solve this problem, the series SS topology system in the two-coil structure is modeled and analyzed by means of the circuit mutual inductance theory with concentrated parameters, and the efficiency synchronization factor is innovatively defined, and the theoretical conditions for the realization of the efficiency synchronization are summarized. Under two different conditions of efficacy synchronization factor 尉 1 and 尉 鈮，

本文编号：2085292