【摘要】：無(wú)線電能傳輸技術(shù)使人們對(duì)于電能的傳輸方式有了新的追求。由于傳統(tǒng)有線輸電方式存在著磨損、老化所帶來(lái)的安全隱患,尤其在醫(yī)療領(lǐng)域、水下和礦井等特殊場(chǎng)合有線輸電方式存在著諸多弊端,因此,迫切需要人們研究更為便捷的無(wú)線輸電方式。相對(duì)于電磁感應(yīng)式無(wú)線電能傳輸技術(shù),磁耦合諧振式無(wú)線電能傳輸技術(shù)具有傳輸距離相對(duì)更遠(yuǎn)、傳輸效率較高等優(yōu)勢(shì),迅速成為近年來(lái)國(guó)內(nèi)外科研機(jī)構(gòu)的研究熱點(diǎn)。然而,實(shí)現(xiàn)更大功率更高效率更遠(yuǎn)距離的無(wú)線電能傳輸目的成為阻礙無(wú)線電能傳輸技術(shù)快速發(fā)展的瓶頸問(wèn)題。針對(duì)此問(wèn)題,首先本文介紹了無(wú)線電能傳輸技術(shù)的發(fā)展背景,對(duì)比了三種主流的無(wú)線電能傳輸方式的優(yōu)缺點(diǎn)和應(yīng)用領(lǐng)域,分析了無(wú)線電能傳輸技術(shù)的國(guó)內(nèi)外研究現(xiàn)狀;其次,利用耦合模理論闡述了磁耦合諧振式無(wú)線電能傳輸系統(tǒng)的傳輸機(jī)理,采用電路理論建立了磁耦合諧振式無(wú)線電能傳輸系統(tǒng)的電路模型,對(duì)電路模型中各個(gè)回路的電流與系統(tǒng)傳輸效率以及負(fù)載接收功率進(jìn)行了解析計(jì)算;然后,闡述了確定磁耦合諧振式無(wú)線電能傳輸系統(tǒng)諧振頻率的方法,仿真分析了磁耦合諧振式無(wú)線電能傳輸系統(tǒng)的頻率分裂現(xiàn)象。通過(guò)對(duì)諧振器散射參數(shù)的仿真計(jì)算,研究分析了頻率分裂對(duì)系統(tǒng)傳輸性能的影響,確定了系統(tǒng)的臨界耦合狀態(tài)、過(guò)耦合狀態(tài)和欠耦合狀態(tài),分別提出了基于系統(tǒng)功率優(yōu)化與系統(tǒng)效率優(yōu)化的頻率匹配策略;接著,分析了諧振器品質(zhì)因數(shù)、耦合系數(shù)、空間位置以及諧振線圈的組合結(jié)構(gòu)等對(duì)系統(tǒng)功效的影響,確定了負(fù)載獲得最大功率的傳輸距離。而且,分別提出了基于系統(tǒng)功率優(yōu)化和系統(tǒng)效率優(yōu)化的負(fù)載匹配策略;最終,通過(guò)搭建實(shí)驗(yàn)樣機(jī)對(duì)上述一系列基于系統(tǒng)功率優(yōu)化與效率優(yōu)化的策略方法進(jìn)行了驗(yàn)證,并且設(shè)計(jì)了一輛小功率的無(wú)線供電軌道小車(chē),達(dá)到了小車(chē)在行駛中供電的目的。本文為解決磁耦合諧振式無(wú)線電能傳輸系統(tǒng)傳輸功率與系統(tǒng)效率的優(yōu)化問(wèn)題提供了一定的理論支撐。
[Abstract]:Radio energy transmission technology makes people have a new pursuit for the mode of transmission of electric energy. Because the traditional cable transmission mode has many disadvantages, such as wear and tear and aging, especially in the medical field, underwater and mine, etc., the cable transmission mode has many disadvantages. There is an urgent need for people to study more convenient wireless transmission methods. Compared with the electromagnetic induction radio energy transmission technology, the magnetic coupling resonant radio energy transmission technology has the advantages of far distance and high transmission efficiency, so it has become the research hotspot of the domestic and foreign scientific research institutions in recent years. However, the realization of radio energy transmission with higher power, higher efficiency and longer distance becomes a bottleneck problem that hinders the rapid development of radio energy transmission technology. Aiming at this problem, firstly, this paper introduces the development background of radio energy transmission technology, compares the advantages and disadvantages of three mainstream radio energy transmission methods and their application fields, and analyzes the current research situation of radio energy transmission technology at home and abroad. Secondly, the transmission mechanism of the magnetically coupled resonant radio energy transmission system is expounded by using the coupling mode theory, and the circuit model of the magnetic coupling resonant radio energy transmission system is established by using the circuit theory. The current, system transmission efficiency and load receiving power of each circuit in the circuit model are calculated analytically. Then, the method of determining the resonant frequency of the magnetically coupled resonant radio energy transmission system is described, and the frequency splitting phenomenon of the magnetic coupling resonant radio energy transmission system is simulated and analyzed. By simulating the scattering parameters of resonator, the influence of frequency splitting on the transmission performance of the system is studied and analyzed, and the critical coupling state, over-coupling state and under-coupling state of the system are determined. The frequency matching strategy based on system power optimization and system efficiency optimization is proposed respectively. Then, the effects of the resonator quality factor, coupling coefficient, space position and the combined structure of the resonant coil on the efficiency of the system are analyzed, and the transmission distance of the maximum power of the load is determined. Furthermore, load matching strategies based on system power optimization and system efficiency optimization are proposed respectively. Finally, a series of strategy methods based on system power optimization and efficiency optimization are verified by building an experimental prototype, and a small power wireless power supply rail trolley is designed to achieve the purpose of power supply while the vehicle is running. This paper provides a theoretical support for the optimization of transmission power and system efficiency of the magnetic coupling resonant radio transmission system.
【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM724

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