本文選題：電勵(lì)磁同步電動(dòng)機(jī) + 三電平逆變器　； 參考：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文

【摘要】：隨著現(xiàn)代電力電子技術(shù)的成熟、微機(jī)控制技術(shù)與大規(guī)模集成電路的發(fā)展,電勵(lì)磁同步電動(dòng)機(jī)因其工作效率高、過載能力強(qiáng)和功率因數(shù)可調(diào)等優(yōu)點(diǎn)在電力拖動(dòng)領(lǐng)域內(nèi)被廣泛使用。本文以電勵(lì)磁同步電動(dòng)機(jī)作為研究對(duì)象,對(duì)基于氣隙磁鏈定向的矢量控制系統(tǒng)、狀態(tài)觀測(cè)器等進(jìn)行分析與研究。本文使用三電平NPC電壓源型交-直-交變頻器驅(qū)動(dòng)電勵(lì)磁同步電動(dòng)機(jī),對(duì)三電平逆變器的拓?fù)湓砑皩?shí)現(xiàn)方法進(jìn)行研究,并對(duì)三電平逆變器輸出的階梯波電壓進(jìn)行重構(gòu)。針對(duì)NPC電壓源型三電平逆變器中點(diǎn)電位不平衡問題,分析其不平衡原因,給出一種基于改變正負(fù)小矢量作用時(shí)間從而實(shí)現(xiàn)中點(diǎn)電位平衡的控制方法。本文以坐標(biāo)變換和矢量控制理論為依托,推導(dǎo)電勵(lì)磁同步電動(dòng)機(jī)在靜止坐標(biāo)系和旋轉(zhuǎn)坐標(biāo)系下的數(shù)學(xué)模型,分析和研究電勵(lì)磁同步電動(dòng)機(jī)氣隙磁鏈定向的基本原理。采用典型I型系統(tǒng)和典型II型系統(tǒng)對(duì)基于氣隙磁鏈定向的控制系統(tǒng)的轉(zhuǎn)速閉環(huán)和磁鏈閉環(huán)分別進(jìn)行傳遞函數(shù)推導(dǎo)與控制器參數(shù)設(shè)計(jì),對(duì)解耦前和解耦后的MT軸定子電流環(huán)進(jìn)行重點(diǎn)研究。并通過搭建仿真模型,對(duì)所設(shè)計(jì)的各個(gè)環(huán)節(jié)進(jìn)行仿真驗(yàn)證和分析。磁鏈的準(zhǔn)確獲取是電動(dòng)機(jī)矢量控制和速度觀測(cè)的核心之一,本文結(jié)合現(xiàn)代控制理論相關(guān)知識(shí)與電勵(lì)磁同步電動(dòng)機(jī)數(shù)學(xué)模型給出狀態(tài)磁鏈觀測(cè)器,并對(duì)降階磁鏈觀測(cè)器和全階磁鏈觀測(cè)器進(jìn)行研究,兩者均是使用狀態(tài)重構(gòu)的方法對(duì)電動(dòng)機(jī)磁鏈進(jìn)行觀測(cè)。將狀態(tài)磁鏈觀測(cè)器與模型參考自適應(yīng)法相結(jié)合給出一種基于狀態(tài)磁鏈觀測(cè)器的模型參考自適應(yīng)法,該方法以模型參考自適應(yīng)原理為基礎(chǔ),以電動(dòng)機(jī)自身參數(shù)作為參考模型并以狀態(tài)觀測(cè)器作為可調(diào)模型,從而實(shí)現(xiàn)電勵(lì)磁同步電動(dòng)機(jī)的轉(zhuǎn)速辨識(shí)。最后基于實(shí)驗(yàn)室現(xiàn)有資源,搭建了基于三電平NPC電壓源型交-直-交變頻器的電勵(lì)磁同步電動(dòng)機(jī)調(diào)速系統(tǒng)實(shí)驗(yàn)平臺(tái),完成主電路器件的選型和程序的編寫,并對(duì)相關(guān)理論進(jìn)行實(shí)驗(yàn)驗(yàn)證。
[Abstract]:With the maturity of modern power electronics technology, the development of microcomputer control technology and large-scale integrated circuit, the electroexcitation synchronous motor is widely used in the field of electric drive because of its high efficiency, strong overload ability and adjustable power factor. In this paper, the vector control system and state observer based on air-gap flux linkage orientation are analyzed and studied based on electrically excited synchronous motor (EMSM). In this paper, the three-level NPC voltage-source AC-DC-AC inverter is used to drive the electrically excited synchronous motor. The topology principle and realization method of the three-level inverter are studied, and the step wave voltage output from the three-level inverter is reconstructed. Aiming at the problem of neutral point potential imbalance in NPC three-level inverter with voltage source, this paper analyzes the causes of the imbalance, and presents a control method based on changing the action time of positive and negative small vectors to realize neutral point potential balance. Based on the coordinate transformation and vector control theory, this paper analyzes and studies the basic principle of air-gap flux linkage orientation of electrically excited synchronous motor based on the mathematical model of electrically excited synchronous motor in static coordinate system and rotating coordinate system. The transfer function and the controller parameters of the control system based on the air-gap flux orientation are derived by the transfer function of the typical type I system and the typical type II system, respectively. The stator current loop of MT axis before and after decoupling is studied in detail. And through building simulation model, the design of each link simulation verification and analysis. The accurate acquisition of flux is one of the core of vector control and speed observation of motor. In this paper, a state flux observer is presented based on the relevant knowledge of modern control theory and mathematical model of electrically excited synchronous motor. The reduced-order flux observer and the full-order flux observer are studied. Both of them use the method of state reconstruction to observe the flux of motor. Combining the state flux observer with the model reference adaptive method, a model reference adaptive method based on the state flux observer is proposed, which is based on the model reference adaptive principle. The speed identification of electrically excited synchronous motor is realized by taking the parameters of the motor as the reference model and the state observer as the adjustable model. Finally, based on the existing resources of the laboratory, the experiment platform of the electro-excitation synchronous motor speed regulation system based on the three-level NPC voltage source AC-DC-AC converter is built, which completes the selection of the main circuit device and the programming of the program. The related theories are verified by experiments.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM341

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本文編號(hào)：2074259