發(fā)布時(shí)間：2018-05-19 16:39

  本文選題：采煤機(jī) + 截割電機(jī)　； 參考：《遼寧工程技術(shù)大學(xué)》2015年碩士論文

【摘要】：煤炭資源從始至終都是我國基礎(chǔ)能源的中流砥柱,現(xiàn)代化以及機(jī)械化綜采環(huán)節(jié)中采煤機(jī)作為重要設(shè)備之一從早期的液壓牽引、鏈牽引進(jìn)一步發(fā)展到當(dāng)今先進(jìn)的電牽引、無鏈牽引,而電牽引技術(shù)由結(jié)構(gòu)繁瑣可靠性差的直流牽引到具有結(jié)構(gòu)簡(jiǎn)單、工作可靠、隔爆性能好等諸多優(yōu)點(diǎn)的交流牽引的快速發(fā)展,使本文關(guān)于采煤機(jī)截割電機(jī)變頻動(dòng)態(tài)特性研究與分析的工程實(shí)踐意義非常具有必要性。采煤機(jī)交流電機(jī)的關(guān)鍵技術(shù)難度之一為截割部驅(qū)動(dòng)電機(jī)的變頻調(diào)速系統(tǒng),本文將變頻過程主要分為整流和逆變兩個(gè)部分,選取MG750/1910-WD型采煤機(jī)為樣機(jī)將整流部分采用電壓空間矢量控制進(jìn)行分析,逆變部分則通過更為先進(jìn)新穎的直接轉(zhuǎn)矩控制方案。由于采煤機(jī)截割部負(fù)載特性作為對(duì)截割電機(jī)變頻動(dòng)態(tài)特性分析研究的基礎(chǔ),首先建立適于變頻系統(tǒng)的截割動(dòng)力學(xué)模型,并由此提出了截割負(fù)載的簡(jiǎn)化模型,使得下面的研究工作得以簡(jiǎn)單方便。之后對(duì)于截割電機(jī)建立了數(shù)學(xué)模型并據(jù)此描述出采煤機(jī)截割電機(jī)變頻機(jī)械特性,針對(duì)截割電機(jī)交流變頻的特點(diǎn)分析了其恒功率控制的動(dòng)態(tài)特性。而后詳細(xì)研究變頻系統(tǒng)中整流器及逆變器的基本原理,基于ASD800型變頻器,對(duì)PWM整流部分使用MATLAB/Simulink模型庫進(jìn)行建模仿真,分析研究了截割電機(jī)整流過程的變頻動(dòng)態(tài)特性。最后在逆變部分依據(jù)直接轉(zhuǎn)矩控制理論并依據(jù)其圓形磁鏈軌跡控制建立了加權(quán)磁鏈觀測(cè)模型,同樣通過Simulink的建模仿真截割電機(jī)變頻系統(tǒng),通過仿真結(jié)果分析了磁鏈、電流、轉(zhuǎn)速與轉(zhuǎn)矩的影響,得出采煤機(jī)截割電機(jī)變頻的動(dòng)態(tài)特性并完整的全面系統(tǒng)的分析,可作為采煤機(jī)的研發(fā)以及工礦實(shí)踐的參考依據(jù)。
[Abstract]:Coal resources are the mainstay of basic energy in our country from beginning to end. As one of the important equipments in modern and mechanized fully mechanized coal mining, shearer has further developed from early hydraulic traction and chain traction to modern advanced electric traction. There is no chain traction, and the electric traction technology develops rapidly from DC traction with complicated structure and low reliability to AC traction, which has many advantages such as simple structure, reliable work, good flameproof performance, etc. It is necessary to study and analyze the frequency conversion dynamic characteristics of shearer cutting motor in this paper. One of the key technical difficulties of AC motor of shearer is the frequency conversion speed regulation system driven by cutting part. In this paper, the frequency conversion process is mainly divided into two parts: rectifier and inverter. The rectifier part is analyzed by voltage space vector control and the inverter part is analyzed by a more advanced direct torque control scheme. Because the load characteristic of cutting part of shearer is the foundation of analyzing the frequency conversion dynamic characteristic of cutting motor, the cutting dynamic model suitable for frequency conversion system is established, and the simplified cutting load model is put forward. So that the following research work can be simple and convenient. Then the mathematical model of cutting motor is established and the frequency conversion mechanical characteristics of cutting motor of coal cutting machine are described. The dynamic characteristics of constant power control are analyzed according to the characteristics of AC frequency conversion of cutting motor. Then the basic principle of the rectifier and inverter in the frequency conversion system is studied in detail. Based on the ASD800 converter, the MATLAB/Simulink model library is used to model and simulate the rectifier part of the PWM, and the dynamic characteristics of the frequency conversion in the rectifying process of the cutting motor are analyzed and studied. Finally, based on the direct torque control theory and the circular flux locus control, the weighted flux observation model is established in the inverter part. The frequency conversion system of the cutting motor is simulated by Simulink, and the flux and current are analyzed by the simulation results. Under the influence of rotational speed and torque, the dynamic characteristics of frequency conversion of cutting motor of shearer and the comprehensive and systematic analysis are obtained, which can be used as a reference for the research and development of shearer and the practice of industry and mining.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD632.1

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本文編號(hào)：1910855