【摘要】：美國麻省理工學(xué)院的科學(xué)家于2007年提出磁諧振耦合無線電能傳輸技術(shù)(wireless power transmission, WPT),該技術(shù)克服了電磁感應(yīng)式和微波式無線電能傳輸?shù)墓逃腥秉c,成為研究熱點。磁諧振耦合無線電能傳輸技術(shù)能夠在米級范圍內(nèi)實現(xiàn)能量的高效率傳輸,且不受周圍非導(dǎo)磁材料的影響。經(jīng)過多年的研究,磁諧振耦合無線電能傳輸技術(shù)得到了長足發(fā)展,其理論分析和實驗研究方法都在不斷完善,但該技術(shù)離實際應(yīng)用還有差距。本文針對系統(tǒng)中的耦合線圈和高頻電源進(jìn)行詳細(xì)分析,具體研究內(nèi)容如下： (1)詳細(xì)介紹了諧振式無線電能傳輸?shù)墓ぷ髟�、基本結(jié)構(gòu)及等效電路。通過近場理論將線圈磁場分為近區(qū)場和遠(yuǎn)區(qū)場,并指出系統(tǒng)的傳輸范圍在近區(qū)場；利用耦合模理論分析得出系統(tǒng)高效工作的條件是兩個耦合線圈具有相同的本征頻率,且當(dāng)兩個耦合線圈具有較大的耦合系數(shù)時,將導(dǎo)致系統(tǒng)的操作頻率與線圈本征頻率出現(xiàn)差別：建立兩線圈結(jié)構(gòu)和四線圈結(jié)構(gòu)耦合模型的等效電路,推導(dǎo)出系統(tǒng)參數(shù)與傳輸功率、傳輸效率的關(guān)系表達(dá)式。 (2)諧振式無線電能傳輸系統(tǒng)耦合線圈的優(yōu)化設(shè)計。以系統(tǒng)等效電路模型為依據(jù)設(shè)計并制作了一個無線電能傳輸裝置,通過實驗驗證所推導(dǎo)公式的準(zhǔn)確性；研究指出四線圈結(jié)構(gòu)的線圈互感對系統(tǒng)傳輸性能有重要影響,通過調(diào)節(jié)電源線圈與發(fā)射線圈,負(fù)載線圈與接收線圈之間的互感,能使系統(tǒng)的負(fù)載適應(yīng)能力和傳輸距離得到明顯優(yōu)化；文中指出當(dāng)傳輸距離較近時存在頻率分裂現(xiàn)象,此時采用頻率跟蹤技術(shù)能使系統(tǒng)傳輸性能得到優(yōu)化；最后通過增加中繼線圈有效提高系統(tǒng)的傳輸距離。 (3)高頻電源的設(shè)計與分析。首先闡述了E類放大電路的工作原理、參數(shù)設(shè)計步驟,并介紹了開關(guān)管的選取要求、驅(qū)動電路的設(shè)計以及元件選型,接著利用Capture CIS對所設(shè)計電路進(jìn)行仿真分析,最后通過實驗對其進(jìn)行驗證,實驗中通過增加一個磁環(huán)變壓器,有效地解決了電源模塊與無線電能傳輸模塊之間參數(shù)匹配困難的問題,實驗結(jié)果表明,本文所設(shè)計E類放大電路能夠輸出17.69W的功率,且傳輸效率達(dá)到88.45%。
[Abstract]:In 2007, scientists at MIT put forward the magnetic resonance coupled radio energy transmission technology (wireless power transmission, WPT), which has overcome the inherent shortcomings of electromagnetic induction and microwave radio energy transmission, and has become a research focus. The magnetic resonance coupled radio energy transmission technology can realize the efficient transmission of energy in the range of meters, and is not affected by the surrounding non-conductive materials. After many years of research, the magnetic resonance coupling radio energy transmission technology has made great progress, its theoretical analysis and experimental research methods are constantly improving, but there is still a gap between the technology and the practical application. In this paper, the coupling coil and high frequency power supply in the system are analyzed in detail. The specific research contents are as follows: (1) the working principle, basic structure and equivalent circuit of resonant radio energy transmission are introduced in detail. Through the theory of near field, the magnetic field of coil is divided into near field and far field, and it is pointed out that the transmission range of the system is in the near field. By using the coupling mode theory, it is concluded that the condition for the efficient operation of the system is that the two coupling coils have the same intrinsic frequency, and when the two coupling coils have a large coupling coefficient, The operating frequency of the system is different from the intrinsic frequency of the coil: the equivalent circuit of the coupling model of the two-coil structure and the four-coil structure is established, and the expression of the relationship between the system parameters and the transmission power and transmission efficiency is derived. (2) the optimal design of coupling coil in resonant radio transmission system. Based on the equivalent circuit model of the system, a radio energy transmission device is designed and fabricated, and the accuracy of the derived formula is verified by experiments. It is pointed out that the coil mutual inductance of the four-coil structure has an important influence on the transmission performance of the system, by adjusting the mutual inductance between the power supply coil and the transmitting coil, the load coil and the receiving coil. The load adaptability and transmission distance of the system can be obviously optimized. It is pointed out that there is frequency division when the transmission distance is close, and the transmission performance of the system can be optimized by using frequency tracking technology. Finally, the transmission distance of the system can be effectively improved by increasing the relay coil. (3) the design and analysis of high frequency power supply. Firstly, the working principle and parameter design steps of class E amplifier circuit are described, and the selection requirements of switch tube, the design of driving circuit and the selection of components are introduced, and then the designed circuit is simulated and analyzed by Capture CIS. Finally, it is verified by experiments. By adding a magnetic ring transformer in the experiment, the problem of parameter matching between power supply module and radio energy transmission module is effectively solved. The experimental results show that the problem of parameter matching between power supply module and radio energy transmission module is effectively solved. The E amplifier designed in this paper can output 17.69W power, and the transmission efficiency is 88.45%.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM724

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