【作者】 杨德东；

【导师】 张忠；

【作者基本信息】 大连铁道学院 ， 交通信息工程及控制， 2003， 硕士

【摘要】 直接转矩控制技术是继矢量控制技术之后交流调速领域中新兴的控制技术，它采用空间矢量分析的方法，直接在定子坐标系下计算并控制交流电动机的转矩和磁链，采用定子磁场定向，借助于离散的两点式控制产生脉宽信号，直接对逆变器的开关状态进行最佳控制，以获得转矩的高动态性能。它省去了复杂的矢量变换与电动机数学模型的简化处理，具有动态反应迅速，结构简单，易于实现等优点。 本篇论文详细介绍了异步电动机直接转矩控制技术的原理，利用MATLAB语言中的SIMULINK模块和电力系统模块库(Power System Blockset)建立了异步电动机直接转矩控制系统的仿真模型。介绍了近年来直接转矩控制的发展以及与其它技术之间的融合。并举例说明了非线性控制理论、神经元网络控制理论、模糊控制理论在直接转矩控制技术中的应用。利用Visual Basic 6.0可视化编程语言对直接转矩控制系统的上位机通信监控程序进行了开发，使其完成了上下位机之间的数据传输，并可以实时地显示下位机传送过来的数据。对异步电动机直接转矩控制系统下位机进行了总体构思和设计，提出了总体设计方案，并对可能出现的问题进行了分析。更多还原

【Abstract】 The direct torque control theory is a kind of new control method after vector control theory in AC control field. It calculates and controls the torque and the flux of AC electromotor in stator coordinate using the voltage space vector. Adopting the stator magnetism field direction method, it recurs to discrete Pang-pang control producing Pulse Width Modulation signal and controls the switch state of the transductor when better quality steady-state performance is produced. Because complicated vector transform and the math model in AC drive is deduced, the method has the performance of quick reaction and design.This paper introduces the direct torque control theory in detail and uses SIMULINK and Power System Blockset in MATLAB building the direct torque control simulation model about asynchronous AC drive. It also introduces the development about direct torque control theory and practice about many kinds of control methods in direct torque control theory. For example, the non-linearity theory, nerve network control theory, fuzzy control theory are applied in the direct torque control theory. It uses Visual Basic 6.0 to develop the corresponding and watching program on the upper computer about direct torque control system of asynchronous induction motor. The program can finish the data transfer between the upper computer and lower controller, and show the data from upper controller in real time. It designs simply the lower controller, makes out the whole scheme and analyses some potential problem.更多还原