【摘要】：自從電能大規(guī)模應(yīng)用以來,電能的傳輸一直都采用有線傳輸。隨著各種用電設(shè)備的增加,各種電線和充電線路雜亂無章、電線間的接觸故障和接觸火花等導(dǎo)致有線傳輸?shù)娜秉c越來越多;另一方面,各種電動汽車充電問題、電氣化鐵路供電問題、物聯(lián)網(wǎng)的大規(guī)模應(yīng)用以及礦井下不適合有線供電的需求增多,導(dǎo)致人們開始尋找新的電能傳輸方式。迄今為止,電能的無線輸送方式分為三種:電磁諧振耦合、電磁感應(yīng)和微波方式。本文通過比較三種傳輸方式的優(yōu)缺點,確定以電磁諧振耦合式無線能量傳輸為研究對象。磁諧振耦合能量傳輸范圍僅限于磁場的近場,與微波和磁感應(yīng)傳輸方式比較,磁諧振耦合效率適中、距離適中、功率適中。本文在理論分析的基礎(chǔ)上,進行了無線能量傳輸系統(tǒng)設(shè)計,并通過制作實驗裝置進行了實驗驗證。首先從電磁諧振耦合的機理上進行梳理,從理論上分析了電路的電磁諧振性質(zhì)和耦合性質(zhì);推導(dǎo)了功率和效率的計算表達式,從式中可以得到頻率、直流電源電壓、耦合系數(shù)、線圈特性、線圈之間距離和負(fù)載特性等對能量傳輸?shù)挠绊?得出了最大功率和最大效率傳輸條件。然后對無線能量傳輸系統(tǒng)進行了系統(tǒng)設(shè)計,從理論上計算了發(fā)射、接收電路參數(shù),利用電磁場仿真軟件FEKO、ADS、數(shù)學(xué)分析工具Matlab等對發(fā)射、接收電路進行了仿真計算,將仿真數(shù)據(jù)與理論數(shù)據(jù)分析比較,確定了發(fā)射、接收線圈的制作參數(shù)。最后設(shè)計制作了發(fā)射線圈、開關(guān)電路、驅(qū)動電路、信號源和低壓電源,通過實際測量數(shù)據(jù),對影響磁諧振耦合能量傳輸?shù)闹萍s條件逐個進行分析,驗證無線能量傳輸?shù)目尚行�。根�?jù)實驗所得數(shù)據(jù),分析了存在問題,提出了增加中繼線圈來提高能量傳輸?shù)拇胧?并從實驗中驗證了方案的可行性,實現(xiàn)了電能的小功率無線傳輸。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM724

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本文編號：2396430