永磁同步电动机直接转矩控制系统的研究
发布时间：2018-10-15 21:11
【摘要】：为了应对能源危机、环境恶化等问题,世界各国都在大力推广高效节能的新能源电动汽车。随着永磁材料价格的下降,电力电子技术的进步永磁同步电动机得以广泛的应用到了新能源汽车上,并且凭借其控制精度、高转矩密度、良好的转矩平稳性以及低噪声等特点越来越受到人们的重视。但是作为核心的调速系统却依然不够完善,传统的直接转矩控制系统存在着转矩脉动严重,不能满足人们对调速平稳性的需求,严重阻碍了汽车工业的发展,故本文通过引入在传统的直接转矩调速系统上引入了矢量控制,利用其控制的精准性达到抑制转矩脉动的目的,提高系统的稳定性。本文主要概述了永磁同步电动机及其调速系统的发展及其应用,建立了永磁同步电动机在不同坐标系上的数学模型,对永磁同步电动机的直接转矩控制调速系统的转矩脉动进行了分析、设计和改进。通过引入矢量控制进而达到抑制转矩脉动的产生。同时对传统的直接转矩控制系统和改进后的基于矢量控制的直接转矩控制系统进行了仿真对比。得出了改进后的系统的确能够有效的抑制转矩脉动的产生,证实了本次论文的设计是正确合理的,最后对进行改进后的控制系统进行了基于DSP的硬件电路设计,进一步的完善本次论文。本文在完成理论推导,对转矩脉动产生的原因进行充分分析之后借助MATLAB仿真平台对改进前和改进后的系统进行仿真对比。验证设计的合理性后进行了系统的软硬件设计,对本文的不足之处进行了分析,和对未来的改进提出了一些思路。
[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.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341;TP273
本文编号：2273845
[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.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341;TP273
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