摘要随着科技的发展，我们所处的时代发生着日新月异的变化，无论是日常生活，还是工程生产，这些变化无处不在，无时无刻不在悄然发生着。就电力电子领域来说，微电子技术、半导体技术、计算机控制技术在上个世纪都是不可想象的，而如今它们的进步和发展速度令我们有些措手不及。最为明显的要数在工厂应用最为广泛的电动机的变化了,它是所有机器运行的基础。如今的电机体积庞大，转速调节的精度却极高，这有赖于交流电动机调速技术的极大进步。20世纪70年代矢量控制技术从学术界提出并被大规模研究，开启了交流电机转速调控的新时代，自此，电机调速技术开始大步迈进。到了80年代德国科学家又提出了一个新理论——直接转矩控制理论，该理论又推动交流电动机调速系统的性能向前迈进了一大步，在有些方面甚至可以赶上直流电动机调速系统。而我们所熟知且应用最为广泛的以鼠笼异步电机为代表的交流电动机，因其构造简单、性能稳定、使用周期长等优点，使得交流电动机比直流电动机更适用应用于直接转矩控制系统中，达到精确调速、立即响应的目的。75958

本篇论文着重针对交流电机中使用最为广泛的三相交流异步电机展开介绍，利用仿真的方法直观地展现出DTC的工作特性和优势，并对该系统在实际应用操作中的可行性作进一步的论证。

毕业论文关键词：DTC  交流电机  仿真

Research On Direct Torque Control System of Induction Motor

Abstract  With the development of science and technology, whether it is in daily life, or production engineering, these changes are everywhere, constantly does not quietly undergoing。 In the field of power electronics and microelectronics technology, semiconductor technology, computer control technology in the last century is unthinkable, and now their progress and development speed makes us somewhat be caught off guard。 The most obvious changes to number in plant applications most motors are widely changes the。 Today's motor bulky, has high speed regulation precision, which depends on AC motor speed control technology, great progress in 20th century 70 In vector control technology appears to open a new era of AC motor speed regulation, since then, motor speed regulation technology began to stride。 In the 1980s German scientists and put forward a new theory -- the theory of direct torque control, the theoretical and promote the performance of AC motor speed governing system with a big step forward, in some ways even can catch up with the DC motor speed control system。 And we are familiar with and used most widely in squirrel cage asynchronous motor as the representative of the AC motor, due to its simple structure, stable operation advantages, so the AC motor than DC motors for direct torque control theory, accurate speed regulation 。

   This paper emphatically for AC motor using the three-phase AC asynchronous motor start about,and the method of simulation shows clearly that the direct torque control system characteristics and advantages, and further proof of the feasibility of the system in the actual operation。

Key Words: DTC  asynchronous motor  simulation

目  录

摘  要 I

Abstract II

1 绪论 1

1。1电机调速技术的发展概况 1

1。2直接转矩控制的发展现状 2

1。3本文所做的工作 3

2 直接转矩控制理论 4

2。1概述