本文關(guān)鍵詞：磁耦合諧振式高溫超導(dǎo)無(wú)線傳能仿真與實(shí)驗(yàn)研究　出處：《西南交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 無(wú)線電能傳輸技術(shù) 諧振式 高溫超導(dǎo) 傳輸特性 耦合模理論

【摘要】：隨著無(wú)線電能傳輸技術(shù)新理論的提出和電力電子器件性能不斷地提高,無(wú)線電能傳輸技術(shù)由于其較遠(yuǎn)距離的傳輸特征重新獲得了許多研究團(tuán)隊(duì)的關(guān)注。同時(shí)其可以替代導(dǎo)線連接充電和受電弓滑動(dòng)接觸供電方式,避免直接接觸產(chǎn)生的導(dǎo)線磨損、積碳和接觸火花等問(wèn)題,提高了供電的安全和可靠性。利用線圈間諧振的方式能夠高效的傳輸能量和超導(dǎo)線圈的低損耗等特點(diǎn),本文進(jìn)行了關(guān)于系統(tǒng)的頻率特性、負(fù)載特性、傳輸特性的研究及不同結(jié)構(gòu)對(duì)于系統(tǒng)電氣性能的影響的分析。首先,本文介紹了無(wú)線電能傳輸?shù)娜N類型及其基本工作原理,說(shuō)明了超導(dǎo)材料在諧振式無(wú)線傳能中的應(yīng)用優(yōu)勢(shì),推導(dǎo)了四種常見(jiàn)電路結(jié)構(gòu)的接收端和發(fā)射端補(bǔ)償電容值,得到了只有SS式電路結(jié)構(gòu)其補(bǔ)償電容值不受負(fù)載電阻值、互感系數(shù)及線圈參數(shù)的影響的結(jié)論。并介紹了耦合模理論及其分析方法,對(duì)比了 SS式結(jié)構(gòu)分別基于電路分析和耦合模理論得到的傳輸效率,驗(yàn)證了該理論分析方法的可行性。針對(duì)本文所研究的陣列式無(wú)線傳能系統(tǒng),基于電路分析原理推導(dǎo)了系統(tǒng)傳輸效率的表達(dá)公式,分析了影響系統(tǒng)傳輸效率的參數(shù)關(guān)系,公式表明合適的負(fù)載電阻值和接收線圈位置能夠提高系統(tǒng)的傳輸效率。其次,考慮到超導(dǎo)材料電導(dǎo)率的非線性,由E-J經(jīng)驗(yàn)公式推導(dǎo)出其電阻率與電壓的表達(dá)公式,并采用四引線法實(shí)驗(yàn)測(cè)試得到超導(dǎo)材料的重要參數(shù)一一臨界電流密度,然后將公式的離散點(diǎn)數(shù)據(jù)寫入材料庫(kù)來(lái)定義超導(dǎo)線圈的特殊性質(zhì)。在以矢量磁位A構(gòu)建電磁場(chǎng)方程的有限元仿真軟件中,優(yōu)化了線圈模型,建立了三維的仿真模型,研究了靜態(tài)下負(fù)載電阻、工作頻率和發(fā)射線圈之間間距等參數(shù)分別與系統(tǒng)輸出功率和傳輸效率的影響關(guān)系,仿真結(jié)果表明:合適的負(fù)載電阻值可使傳輸效率達(dá)到最大值;同時(shí)合理的發(fā)射線圈間距的結(jié)構(gòu)對(duì)于負(fù)載功率的穩(wěn)定性有一定的幫助。之后,在此仿真模型基礎(chǔ)上通過(guò)動(dòng)態(tài)仿真研究了引入速度變量對(duì)系統(tǒng)動(dòng)態(tài)充電產(chǎn)生的影響,結(jié)果表明發(fā)射線圈緊密排列反而促進(jìn)負(fù)載功率的穩(wěn)定。最后,在上述理論研究和仿真分析的基礎(chǔ)上,搭建了陣列式高溫超導(dǎo)無(wú)線電能傳輸?shù)膶?shí)驗(yàn)平臺(tái),進(jìn)行了相關(guān)的無(wú)線電能傳輸實(shí)驗(yàn)測(cè)試,完成了在不同電路參數(shù)(電源工作頻率、占空比和負(fù)載電阻)和實(shí)驗(yàn)結(jié)構(gòu)(發(fā)射線圈間的間距)下的數(shù)據(jù)采集,分析了電路參數(shù)與系統(tǒng)傳輸效率之間的關(guān)系及實(shí)驗(yàn)結(jié)構(gòu)對(duì)于系統(tǒng)負(fù)載端電能接收穩(wěn)定性的影響,實(shí)驗(yàn)驗(yàn)證了準(zhǔn)靜態(tài)測(cè)試過(guò)程中合適的發(fā)射線圈間距的結(jié)構(gòu)能夠使負(fù)載電阻的接收功率隨接收線圈位置變化保持穩(wěn)定的結(jié)論。
[Abstract]:With the development of the new theory of radio energy transmission and the improvement of power electronic device performance. Radio energy transmission technology has gained the attention of many research teams because of its long distance transmission characteristics. At the same time, it can replace wire connection charging and pantograph sliding contact power supply. The safety and reliability of power supply can be improved by avoiding wire wear, carbon deposition and contact spark caused by direct contact. The energy transmission and the low loss of superconducting coil can be efficiently transmitted by the way of resonance between coils. In this paper, the frequency characteristics, load characteristics, transmission characteristics of the system and the effects of different structures on the electrical performance of the system are analyzed. In this paper, three types of radio energy transmission and their basic working principles are introduced, and the advantages of superconducting materials in resonant wireless energy transmission are explained. The compensation capacitance values of the receiver and transmitter of four common circuit structures are deduced, and the compensation capacitance value of SS circuit structure is not affected by the load resistance value. The effect of mutual inductance and coil parameters on the transmission efficiency of the SS structure is compared by introducing the coupling mode theory and its analysis method. The results show that the SS structure is based on the circuit analysis and the coupled mode theory respectively. The feasibility of the theoretical analysis method is verified. Based on the circuit analysis principle, the expression formula of system transmission efficiency is derived for the array wireless energy transmission system studied in this paper. The relationship between the parameters affecting the transmission efficiency of the system is analyzed. The formula shows that the proper load resistance and the position of the receiving coil can improve the transmission efficiency of the system. Secondly, considering the nonlinearity of the conductivity of the superconducting material. The expressions of resistivity and voltage are derived from the E-J empirical formula, and the critical current density, which is an important parameter of superconducting material, is obtained by four-lead method. Then the discrete point data of the formula are written to the material library to define the special properties of the superconducting coil. The coil model is optimized in the finite element simulation software which uses vector magnetic potential A to construct the electromagnetic field equation. A three-dimensional simulation model is established to study the relationship between the parameters of load resistance, working frequency and the distance between transmitting coils and the output power and transmission efficiency of the system under static condition. The simulation results show that the maximum transmission efficiency can be achieved with the appropriate load resistance. At the same time, the reasonable structure of the transmitting coil spacing is helpful to the stability of the load power. On the basis of the simulation model, the influence of introducing velocity variables on the dynamic charging of the system is studied through dynamic simulation. The results show that the tight alignment of the transmitting coils promotes the stability of the load power. On the basis of the above theoretical research and simulation analysis, the experimental platform of array HTS radio energy transmission is built, and the related radio energy transmission experimental test is carried out. The data acquisition is completed under different circuit parameters (power supply frequency duty cycle and load resistance) and experimental structure (distance between transmitting coils). The relationship between the circuit parameters and the transmission efficiency of the system and the influence of the experimental structure on the stability of the power receiving system at the load end are analyzed. The experimental results show that the proper structure of the distance between the transmitting coils during the quasi-static test can keep the receiving power of the load resistor stable with the change of the position of the receiving coil.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM724

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