本文選題：電動(dòng)汽車 + 無線充電��； 參考：《山東大學(xué)》2017年碩士論文

【摘要】：電動(dòng)汽車的大規(guī)模普及有助于緩解目前我國面臨的空氣污染和能源不足的問題。充電樁的不足卻大大地阻礙了電動(dòng)汽車的普及進(jìn)度。相較于傳統(tǒng)的有線充電裝置,電動(dòng)汽車無線充電系統(tǒng)具有占地少、安全度高、智能化水平高等優(yōu)勢,可以加快電動(dòng)汽車的推廣進(jìn)程。但電動(dòng)汽車無線充電系統(tǒng)依然面臨著額定功率較小,系統(tǒng)效率較低的問題,對(duì)電動(dòng)汽車無線充電系統(tǒng)傳輸特性的研究具有重要的現(xiàn)實(shí)意義。本文通過對(duì)諧振式電動(dòng)汽車無線充電系統(tǒng)的原理研究,找到影響系統(tǒng)傳輸功率特性和效率特性的相關(guān)參數(shù)。通過對(duì)各個(gè)參數(shù)與系統(tǒng)功率和系統(tǒng)效率的關(guān)系曲線的分析研究,找到影響傳輸性能最重要的兩個(gè)因素:磁耦合結(jié)構(gòu)和系統(tǒng)控制策略。借助ANSYS電磁仿真軟件對(duì)不同線圈形狀、不同線圈尺寸、有無磁芯等結(jié)構(gòu)的磁耦合機(jī)構(gòu)進(jìn)行建模,并繪制出在磁耦合機(jī)構(gòu)發(fā)生水平偏移時(shí)耦合系數(shù)的改變情況。篩選出性能較好的磁耦合結(jié)構(gòu),為實(shí)驗(yàn)平臺(tái)的搭建提供指導(dǎo)。分別對(duì)調(diào)壓式控制策略、調(diào)頻式控制策略、調(diào)占空比式控制策略的無線充電系統(tǒng)建立Simulink仿真模型,得到不同控制策略下系統(tǒng)的傳輸特性曲線。重點(diǎn)對(duì)采用調(diào)頻策略時(shí),高耦合系數(shù)下和低等效負(fù)載阻值下出現(xiàn)的功率傳輸曲線和效率傳輸曲線的頻率分裂現(xiàn)象加以研究。在實(shí)驗(yàn)平臺(tái)的搭建過程中,本文詳細(xì)論述了直流斬波環(huán)節(jié)、全橋逆變環(huán)節(jié)、磁耦合機(jī)構(gòu)、高頻整流環(huán)節(jié)、功率開關(guān)管驅(qū)動(dòng)電路的設(shè)計(jì)過程,并針對(duì)電感磁芯材料、二極管型號(hào)、功率開關(guān)管型號(hào)、線圈導(dǎo)線的選擇做了分析和說明。選用STM32f407芯片開發(fā)系統(tǒng)的控制電路,并通過無線通信系統(tǒng)連接本裝置的控制系統(tǒng)與車載電池管理系統(tǒng)(BMS)。在實(shí)驗(yàn)環(huán)節(jié),本文搭建的樣機(jī)在20cm垂直間隔下,最大傳輸功率達(dá)到了 6kW,最大傳輸效率達(dá)到90%左右。并通過實(shí)驗(yàn)對(duì)前文有關(guān)磁耦合結(jié)構(gòu)和控制策略部分的仿真結(jié)論進(jìn)行了驗(yàn)證,對(duì)比三種控制策略下的系統(tǒng)傳輸性能并提出需要進(jìn)一步提高和完善的方法。
[Abstract]:The large-scale popularization of electric vehicles helps to alleviate the problem of air pollution and energy shortage in our country. The shortage of the charging pile has greatly hindered the popularization of electric vehicles. Compared with the traditional cable charging device, the electric vehicle wireless charging system has the advantages of less land occupation, high safety and higher intelligence. In order to accelerate the promotion process of electric vehicles, the wireless charging system of electric vehicles still faces the problem of low rated power and low system efficiency. It is of great practical significance to study the transmission characteristics of the wireless charging system of electric vehicles. This paper finds the influence system through the study of the principle of the wireless charging system of the resonant electric vehicle. Through the analysis and study of the relation curves of the power and efficiency of the system, the two factors that affect the transmission performance are found: the magnetic coupling structure and the system control strategy. With the aid of ANSYS electromagnetic simulation software, the shape of different coils, the size of the coils, and the magnetic field are magnetic. The magnetic coupling mechanism of the core structure is modeled and the coupling coefficient changes when the magnetic coupling mechanism has horizontal migration. The magnetic coupling structure with better performance is selected to provide guidance for the construction of the experimental platform. The wireless charging system of the control strategy, the FM control strategy and the air ratio control strategy are respectively used. The Simulink simulation model is established and the transmission characteristic curve of the system under different control strategies is obtained. The focus is on the study of the power transmission curve and the frequency splitting phenomenon of the efficiency transmission curve under the high coupling coefficient and low equivalent load when the frequency modulation strategy is adopted. The design process of DC chopper link, full bridge inverter link, magnetic coupling mechanism, high frequency rectifier link, power switch tube drive circuit, and the selection of inductor core material, diode model, power switch tube model and coil conductor are analyzed and explained. The control circuit of STM32f407 chip development system is selected, and the wireless communication system is adopted. In the experiment link, the maximum transmission power of the prototype is up to 6kW and the maximum transmission efficiency reaches about 90% at the 20cm vertical interval, and the simulation conclusions about the magnetic coupling structure and the control strategy part of the previous article are verified by the experiment, and the contrast three is compared. The transmission performance of the system under different control strategies is proposed.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U469.72;TM724

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