本文選題：磁耦合諧振 + 無線電能傳輸　； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：近年來,無線電能傳輸(WPT)技術(shù)不斷發(fā)展,逐漸成為國內(nèi)外學(xué)術(shù)界關(guān)注的熱點(diǎn)技術(shù)。作為無線電能傳輸技術(shù)發(fā)展的新方向,磁耦合諧振式WPT技術(shù)具有可實(shí)現(xiàn)中遠(yuǎn)距離電能傳輸、效率高、輻射小和非磁性物體對系統(tǒng)影響小等特點(diǎn)。磁耦合諧振式WPT技術(shù)在便攜式電子設(shè)備、智能家居以及電動汽車等軌道交通領(lǐng)域都有廣闊的應(yīng)用前景。目前,國內(nèi)外專家學(xué)者已經(jīng)針對磁耦合諧振式WPT技術(shù)展開研究,并取得一定成果,但有些問題尚未進(jìn)行系統(tǒng)性研究。例如,磁耦合諧振式WPT系統(tǒng)在移動狀態(tài)下,線圈的電磁分析和優(yōu)化設(shè)計(jì)。本文正是基于這個問題進(jìn)行研究分析,磁耦合線圈的設(shè)計(jì)直接影響WPT的性能,是WPT系統(tǒng)研究的核心內(nèi)容。以電動汽車為例,首先分析磁耦合諧振式WPT系統(tǒng)結(jié)構(gòu)和電能傳輸過程。然后采用互感模型理論,建立等效電路模型,并通過Maxwell仿真進(jìn)行電磁分析。最后以提高系統(tǒng)效率,增強(qiáng)抗偏移能力,降低系統(tǒng)輻射為目標(biāo)對線圈進(jìn)行優(yōu)化設(shè)計(jì)。本文的主要研究工作如下:(1)采用互感理論模型分析WPT過程,對比分析選擇串聯(lián)-串聯(lián)諧振補(bǔ)償結(jié)構(gòu),建立系統(tǒng)等效電路模型,在此基礎(chǔ)上分析功率效率特性、頻率特性、距離特性和方向特性這四個基本特性。(2)耦合線圈的優(yōu)化設(shè)計(jì)以提高系統(tǒng)傳輸效率、增強(qiáng)抗偏移能力和降低輻射為優(yōu)化目標(biāo)。在已有模型基礎(chǔ)上,通過Matlab仿真計(jì)算效率等參數(shù)最優(yōu)值,優(yōu)化設(shè)計(jì)線圈參數(shù)。優(yōu)化設(shè)計(jì)主要是針對耦合線圈參數(shù)和結(jié)構(gòu)進(jìn)行優(yōu)化。結(jié)構(gòu)優(yōu)化包括對比分析選擇抗偏移能力好的矩形平面螺旋結(jié)構(gòu)作為耦合線圈結(jié)構(gòu),加入平面磁芯結(jié)構(gòu)提高耦合系數(shù)。(3)通過Maxwell仿真軟件,對WPT過程中耦合線圈抗偏移能力進(jìn)行電磁仿真和分析,得到線圈最優(yōu)傳輸距離和平面磁芯結(jié)構(gòu)最優(yōu)位置。(4)根據(jù)優(yōu)化后參數(shù)計(jì)算可得耦合線圈實(shí)體模型參數(shù),繞制耦合線圈,搭建系統(tǒng)實(shí)驗(yàn)平臺,對優(yōu)化后線圈進(jìn)行實(shí)驗(yàn)分析。實(shí)驗(yàn)可得優(yōu)化后線圈系統(tǒng)傳輸效率提高12%,抗偏移能力最大可提高57.6%。本文的研究不僅研究了磁耦合諧振式WPT系統(tǒng)在移動狀態(tài)下的電磁分布,而且對磁耦合線圈進(jìn)行了優(yōu)化設(shè)計(jì)。本文的研究成果為無線充電過程中存在位置偏移導(dǎo)致效率降低的問題提供解決思路,為便攜式電子產(chǎn)品和電動汽車無線充電的應(yīng)用提供理論基礎(chǔ)。
[Abstract]:In recent years, wireless energy transmission (WPTT) technology has been developing, and has gradually become a hot topic in academic circles at home and abroad. As a new direction in the development of radio energy transmission technology, the magnetically coupled resonant WPT technology has the characteristics of medium and long distance power transmission, high efficiency, small radiation and small influence of non-magnetic objects on the system. Magnetic coupling resonant WPT technology has a wide application prospect in portable electronic devices, smart home and electric vehicles and other rail transit fields. At present, experts and scholars at home and abroad have carried out research on magnetically coupled resonance (WPT) technology, and some achievements have been made, but some problems have not been systematically studied. For example, the electromagnetic analysis and optimization design of magnetic coupling resonant WPT system in moving state. The design of magnetic coupling coil directly affects the performance of WPT and is the core of WPT system research. Taking electric vehicle as an example, the structure of magnetic coupling resonant WPT system and the process of electric power transmission are analyzed. Then, the equivalent circuit model is established by using mutual inductance model theory, and electromagnetic analysis is carried out by Maxwell simulation. Finally, the coil is optimized to improve system efficiency, enhance anti-migration ability and reduce system radiation. The main work of this paper is as follows: (1) the WPT process is analyzed by using the mutual inductance theory model, the series resonant compensation structure is compared and the equivalent circuit model of the system is established. On this basis, the power efficiency characteristics and frequency characteristics are analyzed. The optimization design of the coupling coil is to improve the transmission efficiency, enhance the anti-migration ability and reduce the radiation. Based on the existing models, the parameters of coil are optimized by Matlab simulation. The optimization design is mainly aimed at the optimization of the coupling coil parameters and structure. Structural optimization includes comparative analysis of rectangular planar helical structure with good anti-migration ability as coupling coil structure and adding planar magnetic core structure to increase coupling coefficient by Maxwell simulation software. Through electromagnetic simulation and analysis of the anti-offset ability of coupling coil in WPT process, the optimal transmission distance of coil and the optimal position of planar core structure are obtained. The solid model parameters of coupling coil can be calculated according to the optimized parameters, and the coupling coil can be wound. The system experiment platform is built and the optimized coil is analyzed experimentally. The experimental results show that the transmission efficiency of the coil system is improved by 12 and the maximum anti-offset ability is increased by 57.6 percent. In this paper, not only the electromagnetic distribution of the magnetically coupled resonant WPT system under moving state is studied, but also the optimization design of the magnetically coupled coil is carried out. The research results in this paper provide a theoretical basis for the application of wireless charging of portable electronic products and electric vehicles.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM724

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