基于DSP的异步电机矢量控制系统的研究与实现

发布时间：2018-06-04 03:46

本文选题：异步电机 + 灰色滑模　；参考：《河北工程大学》2015年硕士论文

【摘要】：上世纪中叶以来,随着功率器件的发展与更新换代,使得交流装置向着现代化、智能化的方向迈进。尤其是伴随着矢量控制理论的提出,交流电机取代直流电机已成为历史发展的必然。而基于矢量控制的异步电机在调速性能、响应时间和调速范围上具有无可比拟的优势,故一直是国内外学者研究的重点。本文主要针对异步电机矢量控制系统展开分析与研究,以TI公司生产的TMS320F28335 DSP为控制核心,进行系统的软、硬件的搭建,并充分利用空间电压矢量脉宽调制(SVPWM)技术对电磁磁场圆形轨迹进行跟踪,更好的实现了对采用矢量控制的异步电机的性能控制。本文首先介绍了研究的背景和现实意义,并对异步电机控制技术和矢量理论的发展进行了概括性介绍;然后,为了更直观明了地了解矢量理论把异步电机对定子电流矢量的控制转换为对两相旋转坐标系的电流控制的具体实现过程,运用数学知识对整个变换过程进行详细的数学公式推导,并在此基础上提出基于灰色滑模变结构控制算法的速度调节器,再通过对整个系统的建模仿真,验证了灰色滑模变结构控制策略在提高系统抗扰动等方面具有明显优势;然后完成对以DSP28335为核心控制芯片的异步电机矢量控制实验平台的搭建,主要设计的硬件电路包含主电路、控制电路、驱动电路、检测电路,并在此基础上给出了软件实现过程;最后,结合SVPWM技术进行控制算法实验,试验结果表明了该控制系统可以可靠有效的完成异步电机变频调速。
[Abstract]:Since the middle of the last century, with the development and renewal of power devices, AC devices have moved towards the direction of modernization and intelligence. Especially with the development of vector control theory, it has become a historical necessity for AC motor to replace DC motor. The induction motor based on vector control has unparalleled advantages in speed regulation performance, response time and speed range, so it has always been the focus of scholars at home and abroad. This paper mainly focuses on the analysis and research of the vector control system of asynchronous motor, taking the TMS320F28335 DSP produced by TI company as the control core to build the software and hardware of the system. And the space voltage vector pulse width modulation (SVPWM) technique is fully used to track the circular track of the electromagnetic field, which better realizes the performance control of the asynchronous motor with vector control. This paper first introduces the background and practical significance of the research, and introduces the development of asynchronous motor control technology and vector theory. In order to understand more intuitively the realization process of vector theory, the control of stator current vector of asynchronous motor is transformed into the current control of two-phase rotating coordinate system. The mathematical formula of the whole transformation process is deduced by using mathematical knowledge. On this basis, a speed regulator based on the grey sliding mode variable structure control algorithm is proposed, and then the whole system is modeled and simulated. It is verified that the grey sliding mode variable structure control strategy has obvious advantages in improving the anti-disturbance of the system, and then the experimental platform of vector control of asynchronous motor based on DSP28335 is built. The main hardware circuit includes main circuit, control circuit, drive circuit, detection circuit, and on the basis of this, the software realization process is given. Finally, the control algorithm experiment is carried out with SVPWM technology. The experimental results show that the control system can realize the frequency conversion speed regulation of asynchronous motor reliably and effectively.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM343

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