【摘要】：永磁同步電動機用永磁體取代電勵磁同步電動機轉(zhuǎn)子中的勵磁繞組,具有很多優(yōu)點：體積小、質(zhì)量輕；功率因數(shù)高、效率高；磁通密度高、動態(tài)響應(yīng)快；可靠性高；具有嚴格的轉(zhuǎn)速同步性和寬調(diào)速范圍。因此,永磁同步電動機得到了十分廣泛的應(yīng)用,并在電力傳動領(lǐng)域發(fā)揮著越來越重要的作用。本論文以山西省自然科學基金項目“變頻器供電時永磁同步電動機轉(zhuǎn)矩脈動的減小及優(yōu)化設(shè)計”為背景,從控制理論方面對永磁同步電動機進行了研究。 本文選用內(nèi)埋式永磁同步電機進行控制研究,在分析了永磁同步電機數(shù)學模型和矢量控制原理基礎(chǔ)上,采用id=0的控制方式和空間矢量脈寬調(diào)制技術(shù),在MATLAB/SIMULINK上建立了永磁同步電動機電流、轉(zhuǎn)速雙閉環(huán)矢量控制系統(tǒng)仿真模型,對矢量控制系統(tǒng)的性能進行了仿真研究,仿真結(jié)果表明該系統(tǒng)具有良好的靜動態(tài)性能,與理論分析一致。 研究了永磁同步電動機的弱磁控制原理,對不同的弱磁區(qū)域進行了分析研究,選用梯度下降法作為弱磁控制的方法,在矢量控制系統(tǒng)仿真模型的基礎(chǔ)上,加入了最大轉(zhuǎn)矩電流比(MTPA)模塊和電流參考值修正模塊,搭建永磁同步電動機的弱磁調(diào)速系統(tǒng)仿真模型,并對仿真實驗結(jié)果進行了分析,證明了該方法的可行性。 對永磁同步電動機初始定位原理進行了介紹,并在實驗平臺上驗證該方法的正確性,選用增量式光電碼盤對轉(zhuǎn)速進行檢測,并采用M法進行轉(zhuǎn)速的計算,實驗結(jié)果與理論分析一致。 本文介紹了永磁同步電動機矢量控制系統(tǒng)的硬、軟件實現(xiàn),和矢量控制系統(tǒng)軟件總體設(shè)計、結(jié)構(gòu),利用TI公司生產(chǎn)的TMS320LF2812型DSP芯片,進行永磁同步電動機矢量控制系統(tǒng)的軟件設(shè)計,按照模塊化編程思想,編寫了永磁同步電動機矢量控制系統(tǒng)的應(yīng)用程序。對本實驗系統(tǒng)的硬件總體結(jié)構(gòu)和采樣電路進行了介紹,最后在實驗臺上對系統(tǒng)性能進行了實驗驗證,實現(xiàn)了永磁同步電動機的矢量控制,為以后弱磁調(diào)速實驗研究奠定了基礎(chǔ)。
[Abstract]:Permanent magnet is used to replace the excitation winding in the rotor of electrically excited synchronous motor, which has many advantages: small volume, light mass, high power factor, high efficiency, high flux density, fast dynamic response, high reliability, high flux density, high dynamic response and high reliability. With strict speed synchronization and wide speed range. Therefore, permanent magnet synchronous motor (PMSM) has been widely used and plays a more and more important role in the field of electric power transmission. Based on the project of Shanxi Natural Science Foundation, "torque ripple reduction and optimal Design of permanent Magnet synchronous Motor (PMSM) supplied by Frequency Converter", the control theory of PMSM is studied in this paper. In this paper, the embedded permanent magnet synchronous motor (PMSM) is selected for control research. On the basis of analyzing the mathematical model and vector control principle of PMSM, the control mode of id=0 and the space vector pulse width modulation technology are adopted. The simulation model of double closed loop vector control system of permanent magnet synchronous motor (PMSM) is established on MATLAB/SIMULINK. The performance of the vector control system is simulated. The simulation results show that the system has good static and dynamic performance. It is consistent with the theoretical analysis. In this paper, the principle of magnetic weakening control of permanent magnet synchronous motor (PMSM) is studied, and the different weak magnetic regions are analyzed. The gradient descent method is chosen as the weak magnetic control method. Based on the simulation model of vector control system, The maximum torque / current ratio (MTPA) module and the current reference correction module are added to build the simulation model of the permanent magnet synchronous motor (PMSM). The simulation results are analyzed and the feasibility of the method is proved. The principle of initial positioning of permanent magnet synchronous motor (PMSM) is introduced, and the correctness of the method is verified on the experimental platform. The rotational speed is detected by incremental photoelectric code plate, and the rotational speed is calculated by M method. The experimental results are consistent with the theoretical analysis. This paper introduces the hardware and software realization of the vector control system of permanent magnet synchronous motor, and the overall design and structure of the vector control system software. It uses the TMS320LF2812 DSP chip produced by TI Company. The software design of vector control system for permanent magnet synchronous motor (PMSM) is carried out, and the application program of PMSM vector control system is compiled according to the idea of modular programming. The hardware structure and sampling circuit of the experiment system are introduced. Finally, the performance of the system is verified on the test bench, and the vector control of the permanent magnet synchronous motor is realized, which lays a foundation for the later research on the weak magnetic field speed regulation experiment.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM341

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