无轴承异步电机三电平SVM-DTC系统研究

发布时间：2018-03-16 01:31

本文选题：无轴承异步电机　切入点：三电平　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：无轴承电机(Bearingless Motors),通过定子槽内极对数相差为一的两套绕组相互作用实现转子同时旋转和悬浮,从而改变了传统电机的支撑方式。与其他类型的无轴承电机相比,无轴承异步电机(Bearingless Induction Motors,BIM)结构简单、气隙均匀、齿槽脉动转矩低、易于弱磁控制等优点,适合在高速、真空、强腐蚀污染等恶劣环境下运行,是当前特种电力传动和无轴承电机领域的研究热点之一。本文在国家自然科学基金项目(51475214)和江苏省自然科学基金项目(BK20141301)的资助下,在分析BIM运行原理并建立其数学模型的基础上,针对直接转矩控制系统中的响应脉动大的问题,重点研究了BIM三电平的空间矢量直接转矩控制(Space Vector Modulation Direct Torque Control,SVM-DTC)和基于自抗扰控制器(Active Disturbance Rejection Controller,ADRC)优化的三电平SVM-DTC,具体内容如下:首先,阐述了BIM的研究背景、发展现状和发展趋势,介绍了多电平逆变器的基本理论及三电平逆变器的数学模型,并在此基础上将三电平SVM-DTC系统引入到BIM,在Matlab/Simulink平台中搭建了控制系统,对两电平和三电平SVM-DTC进行了仿真对比分析。其次,在介绍传统PID调节器和ADRC模型和原理的基础上,针对PID调节器的不足,设计了基于ADRC优化的转速调节器和转矩、磁链的闭环控制环节。建立了基于ADRC的BIM SVM-DTC系统并进行了仿真分析。仿真结果表明,系统响应超调降低,动态响应和抗干扰能力增强。最后,以TMS320F2812为主控芯片,分别设计了硬件和软件系统并构建了BIM数字控制系统实验平台,并进行了实验研究。实验结果表明,采用三电平SVM-DTC建立的系统转速和转矩响应脉动降低,具有良好的动、静态性能。
[Abstract]:Bearingless motors can rotate and suspend the rotor simultaneously through the interaction of two sets of windings with a logarithmic difference in the stator slot, thus changing the support mode of the traditional motor. Bearingless Induction motors (BIMs) has the advantages of simple structure, uniform air gap, low torque ripple and easy to be controlled by weak magnetic field. It is suitable for running in high speed, vacuum, strong corrosion pollution, etc. It is one of the research hotspots in the field of special electric power transmission and bearingless motor. This paper is supported by the National Natural Science Foundation of China (51475214) and the Natural Science Foundation of Jiangsu Province (BK20141301). On the basis of analyzing the operation principle of BIM and establishing its mathematical model, aiming at the problem of large response pulsation in direct torque control system, Space Vector Modulation Direct Torque Control (SVM-DTC) of BIM three-level and three-level SVM-DTC based on active Disturbance Rejection controller (ADRC-based) optimization are studied. The main contents are as follows: firstly, the research background, development status and development trend of BIM are described. The basic theory of multilevel inverter and the mathematical model of three-level inverter are introduced in this paper. On this basis, the three-level SVM-DTC system is introduced into the SVM-DTC, and the control system is built in the Matlab/Simulink platform. The simulation of two-level and three-level SVM-DTC is compared and analyzed. Secondly, on the basis of introducing the traditional PID regulator and ADRC model and principle, aiming at the deficiency of PID regulator, the speed regulator and torque based on ADRC optimization are designed. The BIM SVM-DTC system based on ADRC is established and simulated. The simulation results show that the system response overshoot is reduced, the dynamic response and anti-jamming ability is enhanced. Finally, the TMS320F2812 is used as the main control chip. The hardware and software systems are designed, and the experimental platform of BIM digital control system is constructed. The experimental results show that the system based on three-level SVM-DTC reduces the speed and torque ripple, and has good movement. Static performance.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM343;TP273

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