基于协同理论的异步电机控制策略研究
发布时间：2018-10-30 11:09
【摘要】：电机作为传动系统中动力设备,在工程中应用广泛。异步电机由于结构简单、价格低廉、运行可靠等优点在传动系统中占据着十分重要的地位,因此其控制策略一直是国内外学者研究的热点。随着现代控制理论的不断发展和完善,异步电机调速系统的动静态性能得到了极大的提高。本文在传统的矢量控制基础上,结合协同理论对异步电机控制策略进行了研究。本文首先根据坐标变换理论建立了异步电机在三种坐标系下的动态数学模型和旋转坐标系下的状态方程。其次,对电压空间矢量控制和电流滞环比较控制的原理和特性进行了分析,研究了基于转子磁场定向的矢量控制系统。然后,引入协同理论和流形的概念,以二阶线性系统为例阐述了基于协同理论的控制算法求解过程。结合状态空间方程,对异步电机的控制算法进行研究,推导出定子电压和定子电流给定值的数学解析解。通过搭建模型对电机转速闭环、磁链闭环控制进行仿真,并且对电机定转子电阻变化时协同控制系统的动静态性能进行了分析,验证了协同控制算法良好的鲁棒性。同时,因算法中含有负载转矩的瞬时值,引入了林伯格转矩观测器。最后,在理论分析的基础上,通过异步电机实验平台,对电机转速进行了闭环实验,验证了协同控制算法的正确性和可行性。
[Abstract]:As power equipment in transmission system, motor is widely used in engineering. Because of the advantages of simple structure, low price and reliable operation, asynchronous motor occupies a very important position in the transmission system, so its control strategy has been a hot research topic of domestic and foreign scholars. With the development and perfection of modern control theory, the dynamic and dynamic performance of asynchronous motor speed regulating system has been greatly improved. Based on the traditional vector control, the control strategy of asynchronous motor is studied in this paper. In this paper, the dynamic mathematical model of asynchronous motor in three coordinate systems and the equation of state in rotating coordinate system are established according to the coordinate transformation theory. Secondly, the principle and characteristics of voltage space vector control and current hysteresis comparison control are analyzed, and the vector control system based on rotor magnetic field orientation is studied. Then, the cooperative theory and the concept of manifold are introduced. Taking the second-order linear system as an example, the solving process of the control algorithm based on the cooperative theory is described. Based on the state space equation, the control algorithm of induction motor is studied, and the mathematical analytical solution of stator voltage and stator current is derived. The simulation of motor speed closed-loop and flux chain closed-loop control is carried out by building a model, and the dynamic and static performance of the cooperative control system is analyzed when the resistance of stator and rotor changes. The good robustness of the cooperative control algorithm is verified. At the same time, because the algorithm contains the instantaneous value of load torque, the Linberg torque observer is introduced. Finally, on the basis of theoretical analysis, the closed-loop experiment of motor speed is carried out on the experimental platform of asynchronous motor, which verifies the correctness and feasibility of the cooperative control algorithm.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM343
本文编号：2299839
[Abstract]:As power equipment in transmission system, motor is widely used in engineering. Because of the advantages of simple structure, low price and reliable operation, asynchronous motor occupies a very important position in the transmission system, so its control strategy has been a hot research topic of domestic and foreign scholars. With the development and perfection of modern control theory, the dynamic and dynamic performance of asynchronous motor speed regulating system has been greatly improved. Based on the traditional vector control, the control strategy of asynchronous motor is studied in this paper. In this paper, the dynamic mathematical model of asynchronous motor in three coordinate systems and the equation of state in rotating coordinate system are established according to the coordinate transformation theory. Secondly, the principle and characteristics of voltage space vector control and current hysteresis comparison control are analyzed, and the vector control system based on rotor magnetic field orientation is studied. Then, the cooperative theory and the concept of manifold are introduced. Taking the second-order linear system as an example, the solving process of the control algorithm based on the cooperative theory is described. Based on the state space equation, the control algorithm of induction motor is studied, and the mathematical analytical solution of stator voltage and stator current is derived. The simulation of motor speed closed-loop and flux chain closed-loop control is carried out by building a model, and the dynamic and static performance of the cooperative control system is analyzed when the resistance of stator and rotor changes. The good robustness of the cooperative control algorithm is verified. At the same time, because the algorithm contains the instantaneous value of load torque, the Linberg torque observer is introduced. Finally, on the basis of theoretical analysis, the closed-loop experiment of motor speed is carried out on the experimental platform of asynchronous motor, which verifies the correctness and feasibility of the cooperative control algorithm.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM343
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