本文選題：磁耦合諧振 + 最佳諧振頻率��； 參考：《重慶大學》2017年碩士論文

【摘要】：近年來,耦合諧振傳輸技術因其效率高、對環(huán)境和人體安全危害小,以及中等傳遞距離等優(yōu)點而得到了快速的發(fā)展,并存在著廣闊的應用前景。雖有眾多學者對無線能量傳輸技術作了相關研究,取得了一系列不錯的成果,但整個系統(tǒng)最基本、最關鍵的問題卻沒能解決,甚至很少被業(yè)界所提及,那就是關系到系統(tǒng)工作性能的功效同步問題。本文致力于研究磁耦合諧振式無線電能傳輸系統(tǒng)在輸出最大功率的同時系統(tǒng)傳輸效率亦最大,即功效同步,實現(xiàn)無線電能傳輸系統(tǒng)的最佳傳輸,包括磁耦合傳輸子系統(tǒng)及其高頻供電電源系統(tǒng)的整體輸出功率和效率同步達到最大值。為解決該問題,首先利用集中參數(shù)的電路互感理論對兩線圈結構中的串串型(Series Series,SS)拓撲系統(tǒng)進行了建模分析,創(chuàng)新性地定義了功效同步因數(shù),總結了功效同步實現(xiàn)的理論條件。在功效同步因數(shù)ξ=1與ξ≠1兩類不同情況下,采用Math CAD仿真軟件分析了功率與效率關于負載的變化關系,有效證明了系統(tǒng)功率與效率同步的可能性。此外,分析推導出該理論同樣適合于非純阻性負載。SS系統(tǒng)研究結果表明,該結構系統(tǒng)雖能實現(xiàn)傳輸效率與傳輸功率的協(xié)同工作,但該系統(tǒng)功效同步負載及有效負載都較小,難以適應較大負載。為擴大系統(tǒng)功效同步負載及有效負載,接著以兩線圈中的串并型(Series Parallel,SP)拓撲系統(tǒng)為研究對象,建模分析中發(fā)現(xiàn),系統(tǒng)參數(shù)滿足ωC2RL=1時,可極大簡化分析過程。與SS系統(tǒng)相比,其功效同步負載及有效負載均有所提高,但傳輸效率與傳輸功率卻降低了�？紤]到插入中繼線圈可有效提升系統(tǒng)效率的特點,于是對單中繼線圈系統(tǒng)進行功效同步分析,研究結果表明該系統(tǒng)亦可實現(xiàn)功效同步,并且系統(tǒng)效率和功率都有一度程度的提高,與SS和SP系統(tǒng)相比,此結構系統(tǒng)更適合較大阻值的負載。通過對系統(tǒng)最佳頻率影響因素的研究分析,進一步驗證了該理論的正確性。為使系統(tǒng)獲得更高的傳輸效率和功率,對比研究了多種功率放大器,本文最終選用經典E類功放并制成系統(tǒng)功率源。最后,通過搭建無線電能傳輸實驗平臺,對SS結構及單中繼線圈系統(tǒng)功效同步理論進行了實驗驗證。實驗結果表明:兩線圈SS結構工作頻率為1.312 MHz時,系統(tǒng)剛好達到功效同步狀態(tài),此時傳輸效率高達86.7%,功率約為4.01 W;單中繼線圈系統(tǒng)傳輸效率最高約為89.5%,功率達4.31 W,對應的功效同步負載約為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，

本文編號：2085292