异步电机论文：带电参数辨识的异步电机矢量控制系统研究.doc

异步电机论文：带电机参数辨识的异步电机矢量控制系统研究 【中文摘要】异步电机矢量控制是20世纪末期开始兴起的一种高性能的交流调速方法,但是其控制性能受电机参数影响,因此研究带参数辨识的矢量控制系统和电机电阻随温度的变化规律具有重要意义。本文从理论研究、算法设计、仿真验证和硬件实现等四个方面展开研究。论文首先分析了坐标变换的原理和异步电机的数学模型,研究了按转子磁链定向的的矢量控制系统,并建立了基于MATLAB/SIMULINK的异步电机矢量控制系统的仿真模型,分析了该系统的静态和动态性能。结合理论和仿真分析,进一步研究了电机参数变化对控制性能的影响,证明了参数辨识的必要性和重要意义。其次,研究了电机电阻自检测的方法。仿真表明该方法具有较高的准确性和可行性。研究了矢量控制系统的算法和带转子时间常数辨识矢量控制系统算法,并设计了转子时间常数观测器自适应算法,通过仿真验证了该算法具有准确和迅速的跟踪响应,能够随电机温度和磁场的变化改善矢量控制系统的性能。最后,针对一台2.2kW的异步电机实现了定、转子电阻的自检测,通过实验得到了定、转子电阻与温度的关系曲线,在室温已知的情况的可简化自检测过程,由温度曲线查询相应的冷态电阻值,确定矢量控制系统中电机参数初值。对转子时间常数失调的矢量控制系统进行了相关实验,结果表明在转子时间常数不准确的情况下,矢量控制系统的性能受到严重影响。实现了带转子时间常数辨识的矢量控制系统,实验表明该系统具有良好的静态和动态性能。 【英文摘要】Vector control system of asynchronous motor is one of the high performance AC Speed Regulation Systems. The control performance of the system is greatly depends on the accuracy of motor parameters.Therefore, research of vector control system with parameter identification has great significance for vector control system. The subject is comprohensively studied through analysis, arithmetic, simulations and experiments.Firstly, based on the principle of coordinate transformation and the asynchronous motor model, the rotor field-oriented vector control system is studied. After the simulation in Matlab platform, the results show that the system has good static and dynamic performance.and the importance of motor parameters is also discussed in the simulation.Secondly, self-tuning of motor resistance is studied. Simulation shows self-tuning have high precision.Research of the rotor field-oriented vector control system with online adaptive observer of rotor time constant is also carried out with the rotor time constant observer designed. Simulation shows the algorithm has good tracking performance, and the vector control system has good static and dynamic performance.Finally, self-tuning of motor resistance is carried out according to a 2.2kW motor at different temperatures, resistance and temperature curve is got as the result. Therefore, the re