發(fā)布時間：2018-10-15 21:11

【摘要】：為了應(yīng)對能源危機、環(huán)境惡化等問題,世界各國都在大力推廣高效節(jié)能的新能源電動汽車。隨著永磁材料價格的下降,電力電子技術(shù)的進步永磁同步電動機得以廣泛的應(yīng)用到了新能源汽車上,并且憑借其控制精度、高轉(zhuǎn)矩密度、良好的轉(zhuǎn)矩平穩(wěn)性以及低噪聲等特點越來越受到人們的重視。但是作為核心的調(diào)速系統(tǒng)卻依然不夠完善,傳統(tǒng)的直接轉(zhuǎn)矩控制系統(tǒng)存在著轉(zhuǎn)矩脈動嚴重,不能滿足人們對調(diào)速平穩(wěn)性的需求,嚴重阻礙了汽車工業(yè)的發(fā)展,故本文通過引入在傳統(tǒng)的直接轉(zhuǎn)矩調(diào)速系統(tǒng)上引入了矢量控制,利用其控制的精準性達到抑制轉(zhuǎn)矩脈動的目的,提高系統(tǒng)的穩(wěn)定性。本文主要概述了永磁同步電動機及其調(diào)速系統(tǒng)的發(fā)展及其應(yīng)用,建立了永磁同步電動機在不同坐標系上的數(shù)學(xué)模型,對永磁同步電動機的直接轉(zhuǎn)矩控制調(diào)速系統(tǒng)的轉(zhuǎn)矩脈動進行了分析、設(shè)計和改進。通過引入矢量控制進而達到抑制轉(zhuǎn)矩脈動的產(chǎn)生。同時對傳統(tǒng)的直接轉(zhuǎn)矩控制系統(tǒng)和改進后的基于矢量控制的直接轉(zhuǎn)矩控制系統(tǒng)進行了仿真對比。得出了改進后的系統(tǒng)的確能夠有效的抑制轉(zhuǎn)矩脈動的產(chǎn)生,證實了本次論文的設(shè)計是正確合理的,最后對進行改進后的控制系統(tǒng)進行了基于DSP的硬件電路設(shè)計,進一步的完善本次論文。本文在完成理論推導(dǎo),對轉(zhuǎn)矩脈動產(chǎn)生的原因進行充分分析之后借助MATLAB仿真平臺對改進前和改進后的系統(tǒng)進行仿真對比。驗證設(shè)計的合理性后進行了系統(tǒng)的軟硬件設(shè)計,對本文的不足之處進行了分析,和對未來的改進提出了一些思路。
[Abstract]:In order to deal with the problems of energy crisis and environmental deterioration, the countries all over the world are vigorously promoting new energy electric vehicles with high efficiency and energy saving. With the decrease of the price of permanent magnet materials, PMSM has been widely used in new energy vehicles with its control precision and high torque density. People pay more and more attention to the good torque stability and low noise. However, as the core of the speed regulation system, it is still not perfect. The traditional direct torque control system has serious torque ripple, which can not meet the need of speed regulation stability, and seriously hinders the development of automobile industry. In this paper, vector control is introduced into the traditional direct torque governing system, and the precision of the control is used to suppress the torque ripple and improve the stability of the system. In this paper, the development and application of permanent magnet synchronous motor (PMSM) and its speed regulating system are summarized, and the mathematical models of PMSM in different coordinate systems are established. The torque ripple of direct torque control system of permanent magnet synchronous motor (PMSM) is analyzed, designed and improved. The torque ripple is restrained by introducing vector control. At the same time, the traditional direct torque control system and the improved direct torque control system based on vector control are simulated and compared. It is concluded that the improved system can restrain torque ripple effectively, and the design of this paper is correct and reasonable. Finally, the hardware circuit of the improved control system is designed based on DSP. Further improve this paper. In this paper, after the theoretical derivation is completed, the causes of torque ripple are fully analyzed, and then the system before and after the improvement is simulated and compared with the MATLAB simulation platform. After verifying the rationality of the design, the software and hardware of the system are designed, the shortcomings of this paper are analyzed, and some ideas for future improvement are put forward.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM341;TP273

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本文編號：2273845