【摘要】：磁耦合諧振式無(wú)線電能傳輸技術(shù)作為一種新興的電能傳輸技術(shù)不僅應(yīng)用前景較大,傳輸距離較遠(yuǎn)而且還可以穿透障礙物。它彌補(bǔ)了傳統(tǒng)無(wú)線電能傳輸中的不足,提出了無(wú)線電能傳輸?shù)男路椒?具有重要的科學(xué)意義和研究?jī)r(jià)值。目前,磁耦合諧振式無(wú)線電能傳輸技術(shù)離大規(guī)模推廣還有一定的距離,該技術(shù)目前還存在一系列需要解決的問(wèn)題,功率和效率問(wèn)題就是其中之一。由于無(wú)線傳輸距離的改變、諧振線圈之間發(fā)生偏移以及負(fù)載發(fā)生改變等各方面因素都會(huì)影響整個(gè)傳輸系統(tǒng)的性能,尤其是導(dǎo)致系統(tǒng)的傳輸功率和效率大幅下降。本文針對(duì)上述問(wèn)題研究了過(guò)耦合情況下功率和效率下降的問(wèn)題以及頻率分裂不一致性,提出一種傳輸功率和效率同步的方法——自適應(yīng)頻率同步跟蹤控制方法。首先,本文對(duì)磁耦合諧振式無(wú)線電能傳輸系統(tǒng)的組成以及原理進(jìn)行分析,并對(duì)系統(tǒng)頻率特性進(jìn)行了研究。研究發(fā)現(xiàn)當(dāng)系統(tǒng)處于過(guò)耦合狀態(tài)時(shí),系統(tǒng)頻率會(huì)發(fā)生分裂,從而導(dǎo)致傳輸功率和效率大幅下降。在此基礎(chǔ)上,本文進(jìn)一步深入研究了過(guò)耦合狀態(tài)下功率最大值、效率最大值與頻率的關(guān)系,得出了在過(guò)耦合狀態(tài)下,系統(tǒng)傳輸功率最大值和效率最大值所對(duì)應(yīng)的頻率點(diǎn)不一致的結(jié)論。為系統(tǒng)功率效率同步跟蹤提供了理論依據(jù)。其次,在磁耦合諧振式無(wú)線電能傳輸原理的基礎(chǔ)上,設(shè)計(jì)了磁耦合諧振式無(wú)線電能傳輸頻率跟蹤實(shí)驗(yàn)系統(tǒng),主要包括DSP控制系統(tǒng)、DDS信號(hào)發(fā)生器、功率放大器、諧振器、整流電路、無(wú)線通信模塊和功率檢測(cè)電路。基于頻率跟蹤的宗旨及硬件設(shè)計(jì),本文對(duì)系統(tǒng)分裂狀態(tài)進(jìn)行擬合和數(shù)據(jù)分析之后,研究了三種優(yōu)化算法及其改進(jìn)方法,以提高頻率跟蹤的速度和精度,并通過(guò)matlab仿真驗(yàn)證其算法的可行性。最后通過(guò)結(jié)合無(wú)線通信裝置,利用植入DSP的改進(jìn)算法控制射頻源頻率同步跟蹤系統(tǒng)諧振頻率,從而提高過(guò)耦合工作狀態(tài)下負(fù)載端接收功率和效率。最后,通過(guò)搭建的頻率跟蹤控制系統(tǒng)實(shí)驗(yàn)平臺(tái)來(lái)驗(yàn)證理論的正確性。首先對(duì)系統(tǒng)功率和效率的不一致性進(jìn)行了實(shí)驗(yàn)驗(yàn)證。其次,針對(duì)在是否加入頻率跟蹤的兩種情況下,對(duì)功率最優(yōu)、效率最優(yōu)以及功率效率同步跟蹤進(jìn)行了實(shí)驗(yàn)研究。通過(guò)實(shí)驗(yàn)研究對(duì)提出的磁耦合諧振式無(wú)線電能傳輸系統(tǒng)頻率跟蹤控制方法的實(shí)時(shí)性、可靠性進(jìn)行了驗(yàn)證,從而進(jìn)一步豐富了無(wú)線電能傳輸技術(shù)的理論研究,促進(jìn)了實(shí)用產(chǎn)品的開(kāi)發(fā)。
[Abstract]:As a new kind of electric energy transmission technology, the magnetically coupled resonant radio energy transmission technology not only has a great application prospect, but also can penetrate obstacles. It makes up for the deficiency of traditional radio energy transmission, and puts forward a new method of radio energy transmission, which has important scientific significance and research value. At present, the technology of magnetically coupled resonant radio energy transmission is still far away from large-scale popularization. There are still a series of problems to be solved in this technology, among which power and efficiency are one of them. Because of the change of the wireless transmission distance, the deviation between the resonant coils and the change of the load will affect the performance of the whole transmission system, especially the transmission power and efficiency of the system will be greatly reduced. In this paper, the problem of power and efficiency decline and frequency splitting inconsistency under over-coupling is studied. An adaptive frequency synchronization tracking control method is proposed to synchronize transmission power and efficiency. Firstly, the composition and principle of the magnetic coupling resonant radio energy transmission system are analyzed, and the frequency characteristics of the system are studied. It is found that when the system is in an over-coupled state, the frequency of the system will split, resulting in a significant decrease in transmission power and efficiency. On this basis, the relationship between the maximum power, the maximum efficiency and the frequency in the over-coupling state is further studied in this paper, and it is concluded that in the over-coupling state, the relationship between the maximum power, the maximum efficiency and the frequency is obtained. The conclusion that the maximum transmission power and the maximum efficiency of the system are corresponding to the frequency point is inconsistent. It provides a theoretical basis for synchronous tracking of power efficiency. Secondly, on the basis of the principle of magnetic coupling resonance radio energy transmission, a frequency tracking experiment system of magnetic coupling resonant radio energy transmission is designed, which mainly includes DSP control system, DDS signal generator, power amplifier, resonator. Rectifier circuit, wireless communication module and power detection circuit. Based on the aim and hardware design of frequency tracking, after fitting and data analysis of the split state of the system, three optimization algorithms and their improved methods are studied to improve the speed and accuracy of frequency tracking. The feasibility of the algorithm is verified by matlab simulation. Finally, the resonant frequency of radio frequency synchronous tracking system is controlled by the improved algorithm of implanting DSP, which can improve the receiving power and efficiency of the load end under over-coupling operation. Finally, the experimental platform of frequency tracking control system is built to verify the correctness of the theory. Firstly, the inconsistency of power and efficiency of the system is verified experimentally. Secondly, the optimal power, the optimal efficiency and the synchronous tracking of power efficiency are studied under the condition of whether frequency tracking is added or not. The real-time and reliability of the proposed frequency tracking control method for the magnetic coupling resonant radio energy transmission system is verified by experimental research, which further enriches the theoretical research of radio energy transmission technology. Promote the development of practical products.
【學(xué)位授予單位】：天津工業(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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