本文選題：非對稱耦合 + 軟開關(guān)��； 參考：《天津工業(yè)大學(xué)》2017年碩士論文

【摘要】：氣候變化,能源短缺等問題是人類社會面臨的長期問題。交通領(lǐng)域的尾氣排放、能源消耗等問題能否得到有效解決直接影響人類的生活質(zhì)量,被稱為綠色能源的電動汽車再次成為人們研究的焦點問題。無線電能傳輸(WPT)技術(shù)是一種安全,便捷有效的新型充電方式,可以作為電動汽車充電方式的有效補充。針對該技術(shù)的特點以及其中存在的一些問題,本文從系統(tǒng)的工作模式、拓撲結(jié)構(gòu)以及控制算法等方面進行了研究,并提出了改進方案。一、針對電磁場中耦合模理論和電場中的電路理論,建立無線電能傳輸技術(shù)的數(shù)學(xué)模型,并針對其中特有的傳輸特性的成因進行了討論。研究了系統(tǒng)功率最大值的臨界狀態(tài)以及系統(tǒng)出現(xiàn)頻率分裂現(xiàn)象的原因,同時探討了過耦合狀態(tài)下系統(tǒng)功效矛盾的產(chǎn)生機理。二、針對WPT系統(tǒng)的能效特性,提出了一套高能效及強魯棒性的無線電能傳輸電源方案。首先針對電網(wǎng)側(cè)諧波污染問題,設(shè)計了一種基于WPT系統(tǒng)的平均電流控制的功率因數(shù)校正方法對諧波污染進行改善,并對系統(tǒng)的功率因數(shù)校正部分進行了小信號數(shù)學(xué)模型建立,探討了滿足系統(tǒng)穩(wěn)定性的條件。同時基于WPT系統(tǒng)的頻率穩(wěn)定性問題,提出了一種基于PI控制的頻率追蹤方法,并建立了時域的閉環(huán)傳遞函數(shù),探討了頻率穩(wěn)定的先決條件。設(shè)計搭建了一套300W的實驗樣機系統(tǒng),對電源頻率跟蹤特性、功率穩(wěn)定特性以及系統(tǒng)距離特性和方向特性等進行了實驗分析。三、最后考慮IPT系統(tǒng)中多儲能諧振網(wǎng)絡(luò)非線性動力學(xué)特性,利用廣義狀態(tài)空間平均法,建立了無線電能傳輸系統(tǒng)的通用簡化模型,并且對外界擾動和各類不確定性因素造成的頻率穩(wěn)定問題進行研究。提出了一種基于發(fā)射端電流的改進自適應(yīng)跟蹤控制方法,利用自抗擾控制中將不確定性因素視為外擾的思想,在此基礎(chǔ)上設(shè)計了適用于感應(yīng)耦合式無線能量傳輸?shù)淖赃m應(yīng)跟蹤控制方案。通過仿真結(jié)果表明,此自適應(yīng)跟蹤控制器具有很強的魯棒性,可以在系統(tǒng)狀態(tài)參數(shù)或者輸入輸出量發(fā)生劇烈變化時,對系統(tǒng)發(fā)射端電路進行高速穩(wěn)定控制,具有很強的應(yīng)用價值。
[Abstract]:Climate change and energy shortage are long-term problems facing human society. Whether the problems of exhaust emissions and energy consumption in the field of transportation can be effectively solved directly affect the quality of human life, the electric vehicle (EV), which is called green energy, has once again become the focus of people's research. Radio energy transmission (WPTT) technology is a safe, convenient and effective new charging method, which can be used as an effective supplement to electric vehicle charging mode. Aiming at the characteristics of the technology and some problems, this paper studies the working mode, topology structure and control algorithm of the system, and puts forward an improved scheme. Firstly, the mathematical model of radio energy transmission technology is established according to the coupled mode theory in electromagnetic field and the circuit theory in electric field, and the causes of its special transmission characteristics are discussed. The critical state of the maximum power of the system and the cause of frequency splitting are studied, and the mechanism of the system efficiency contradiction under the over-coupling state is also discussed. Secondly, according to the energy efficiency characteristics of WPT system, a set of high energy efficiency and strong robustness radio energy transmission power supply scheme is proposed. Firstly, a power factor correction method based on the average current control of WPT system is designed to improve the harmonic pollution, and the small signal mathematical model of the power factor correction part of the system is established. The conditions satisfying the stability of the system are discussed. At the same time, based on the frequency stability of WPT system, a frequency tracking method based on Pi control is proposed, and the closed-loop transfer function in time domain is established, and the precondition of frequency stability is discussed. A 300W experimental prototype system is designed and built. The characteristics of power frequency tracking, power stability, system distance and direction are analyzed experimentally. Thirdly, considering the nonlinear dynamic characteristics of multi-energy storage resonance network in IPT system, the generalized state space averaging method is used to establish a general simplified model of radio energy transmission system. And the frequency stability problem caused by external disturbance and various uncertain factors is studied. An improved adaptive tracking control method based on emitter current is proposed. Based on this, an adaptive tracking control scheme for induction coupled wireless energy transmission is designed. The simulation results show that the adaptive tracking controller is robust and can be used to control the transmitter circuit at high speed when the system state parameters or input / output parameters change dramatically. It has strong application value.
【學(xué)位授予單位】：天津工業(yè)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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