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異步電機與直流電機互饋試驗系統(tǒng)的研究

發(fā)布時間:2018-06-05 22:04

  本文選題:異步電機 + 直流電機; 參考:《西南交通大學》2017年碩士論文


【摘要】:軌道交通是一種高效、快捷的運輸方式,我國擁有世界上最長的軌道交通線路,軌道交通產(chǎn)業(yè)也成為我國支柱產(chǎn)業(yè)之一。因此,我國需要大量培養(yǎng)軌道交通電力牽引技術方面的人才。目前我國開設有牽引相關專業(yè)的高校有幾十余所,電力牽引課程是其核心課程,但是適用于試驗教學相關設備相對缺乏,一定程度上影響教學效果。開發(fā)電力牽引相關試驗教學設備滿足目前我國高校的教學需求十分迫切。本文結合"電力機車電力牽引傳動控制教學系統(tǒng)"項目,開展異步電機與直流電機互饋試驗系統(tǒng)的研究,并開發(fā)樣機。結合項目主要完成以下工作:異步電機與直流電機互饋試驗系統(tǒng)的主電路結構與工作原理。分析了試驗系統(tǒng)直流電機與異步電機分別在牽引試驗的工作原理;詳細闡述了交直傳動系統(tǒng)中三段經(jīng)濟半控橋的主電路結構和工作原理;其次,分析了交流傳動系統(tǒng)中的四象限整流器的主電路拓撲,根據(jù)定義的開關函數(shù)建立了數(shù)學模型并分析工作原理,在此基礎上分析了引入電壓前饋的電壓、電流雙閉環(huán)控制策略;最后,論文詳細分析了 SVPWM調(diào)制方式的實現(xiàn)以及異步電機基于轉子磁場定向的矢量控制進行了研究。試驗系統(tǒng)平臺的主電流參數(shù)和控制電路設計。根據(jù)項目設計和性能指標,分別針對交直傳動系統(tǒng)和交直交傳動系統(tǒng)的牽引變壓器、功率器件、三段經(jīng)濟半控橋中的平波電抗器、四象限整流器中的儲能電感以及中間直流環(huán)節(jié)取消二次諧振電路下的支撐電容進行參數(shù)設計和器件選型;此外,根據(jù)功率器件性能分別設計了 SCR與IGBT的驅動電路、直流電機勵磁可調(diào)電路、電機轉速采樣電路以及電壓與電流采樣電路。轉子磁鏈全階觀測器的設計和試驗系統(tǒng)仿真。針對傳統(tǒng)的轉子磁鏈觀測器的電壓和電流模型受電機參數(shù)變化影響大的問題,本文設計了一種轉子磁鏈全階觀測器,基于MATLAB/Simulink仿真對比了三種磁鏈觀測器在電機定轉子電阻參數(shù)變化時,轉子磁鏈全階觀測器具有抗干擾性強的優(yōu)點;此外,依據(jù)試驗系統(tǒng)設計的主電路參數(shù)分別搭建了交直傳動和交直交傳動系統(tǒng)仿真平臺,通過仿真結果驗證了直流電機與異步電機分別在牽引、制動工況下的工作原理和參數(shù)設計的可行性。異步電機與直流電機互饋試驗系統(tǒng)平臺性能驗證。搭建好基于實驗室開發(fā)的DSP+FPGA控制器的互饋試驗系統(tǒng)平臺,通過程序開發(fā)對樣機性能進行調(diào)試,進行了異步電機與直流電機互饋試驗。實驗分析表明:(1)試驗系統(tǒng)平臺能真實的反映交直傳動系統(tǒng)和交直交傳動系統(tǒng)的性能和特征,滿足試驗教學的目的;(2)了解交直交傳動相對于交直傳動的優(yōu)越性,將能量回饋電網(wǎng)的設計方案,達到節(jié)能的效果。
[Abstract]:Rail transportation is a kind of efficient and fast transportation mode. China has the longest rail transit line in the world, and the rail transportation industry has become one of the pillar industries in China. Therefore, our country needs a large number of talents to train the electric traction technology of rail transportation. At present, there are more than ten colleges and universities in China with traction related specialties. The course of traction is the core course, but it is suitable for the relative lack of related equipment in test and teaching. It has a certain influence on the teaching effect. It is very urgent to develop the teaching equipment of electric traction related test teaching. This paper combines the project of "electric locomotive power traction and transmission control teaching system" and develops asynchronous motor. With the research of the DC motor mutual feed test system and the development of the prototype, the main circuit structure and working principle of the asynchronous motor and the DC motor mutual feed test system are mainly completed. The working principle of the DC motor and the asynchronous motor in the traction test is analyzed, and the three in the transmission system is expounded in detail. The main circuit structure and working principle of the section economic semi control bridge are introduced. Secondly, the main circuit topology of the four quadrant rectifier in the AC drive system is analyzed. The mathematical model is established and the working principle is analyzed according to the defined switching function. On this basis, the electric voltage and current double closed loop control strategy are introduced. Finally, the paper is detailed. The realization of the SVPWM modulation mode and the vector control based on the rotor magnetic field orientation are studied. The main current parameters and the control circuit of the test system platform are designed. According to the project design and performance indicators, the traction transformers, power devices, and three segments of the AC drive system and the AC transmission system are respectively targeted. The flat wave reactor in the semi controlled bridge, the energy storage inductor in the four quadrant rectifier and the support capacitor in the intermediate DC link to cancel the support capacitance under the two resonant circuit are designed for parameter design and device selection. In addition, the driving circuit of SCR and IGBT is designed according to the performance of the power device, the adjustable circuit of the DC motor excitation and the sampling circuit of the motor speed are used. And voltage and current sampling circuit. Design and Simulation of full order observer of rotor flux. Aiming at the problem that the voltage and current model of the conventional rotor flux observer is affected by the change of motor parameters, a full order observer of rotor flux is designed in this paper. Based on MATLAB/ Simulink simulation, three kinds of flux observer are compared. When the parameters of the stator and rotor resistance change, the full order observer of the rotor flux has the advantage of strong anti-interference. In addition, according to the main circuit parameters designed by the test system, the simulation platform of the AC direct transmission and the AC direct transmission system is set up respectively. The simulation results verify the work of the DC motor and the asynchronous motor under the condition of traction and braking, respectively. The feasibility of making the principle and parameter design. The performance verification of the asynchronous motor and the DC motor mutual feed test system platform. The mutual feed test system platform based on the DSP+FPGA controller developed in the laboratory is set up. The performance of the prototype is debugged through the program development, and the mutual feed test of the asynchronous motor and the DC motor is carried out. The experimental analysis shows that (1) test The system platform can truly reflect the performance and characteristics of the transmission system and the cross direct transmission system, and meet the purpose of experimental teaching. (2) understanding the superiority of cross direct transmission relative to the cross direct transmission, and giving feedback to the design scheme of the power grid to achieve the effect of energy saving.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM343;TM33

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