基于直接转矩的异步电机调速系统仿真 基于直接转矩的异步电机调速系统仿真 基于直接转矩的异步电机调速系统仿真 基于直接转矩的异步电机调速系统仿真
摘要 ： 直接转矩控制是一种高性能的交流电机调速技术 。 本文针对异步电机交流调速系统
的特点，利用空间矢量分析的方法，直接在定子坐标系下计算交流电机的磁链和转矩 ， 并
跟踪定子磁链和转矩 ， 采用定子磁场定向 ， 借助于离散的两点式调节产生 PWM 信号 ， 对逆
变器的开关状态进行最优控制 ， 从而获得高动态性能的转矩响应 。 直接转矩控制避免了矢
量控制中复杂的变换和参数运算，使控制结构变得简单。5259
本文首先介绍了电机调速系统的发展 、 直接转矩控制技术的特点及研究现状 ， 然后介
绍了直接转矩控制的基本工作原理 ， 接着在 MATLAB/ simulink 环境下搭建了定子磁链轨迹
近似圆形的异步电机直接转矩控制系统的仿真模型 ， 并详细介绍了该仿真模型各环节的具
体搭建过程 ， 从理论上验证了该方法的可行性 。 最后对仿真波形进行分析 ， 结果表明系统
性能与期望值相吻合，从而验证了该仿真系统的正确性。
关键词： 直接转矩控制；空间矢量 ；仿真； matlab
Simulation Simulation Simulation Simulation of of of of the the the the speed speed speed speed regulation regulation regulation regulation system system system system of of of of asynchronous asynchronous asynchronous asynchronous
motor motor motor motor based based based based onononon direct direct direct direct torque torque torque torque control control control control
Abstract: Abstract: Abstract: Abstract: Direct torque control is a high performance speed control technology of AC motor.In
this paper, in order to achieve high dynamic performance response of torque, according to the
characteristics of AC induction motor speed control system, the method of space vector had
been used,AC motor's flux and torque had been calculated in the stator coordinate directly,and
the stator flux linkage and torque had been kept track of ,the stator field orientation had been
used ， and PWM signal had been regulated with the help of discrete points to optimal control the
switch states of the inverter , .using the method of direct torque control,the computational
complexity of the transformation parameters in vector control had been avoided, and the control
structure became simple.
In this paper ,the development of the technology of motor speed control system , the
characteristics of direct torque control and its current situation had been first introduced, then
the basic principle of direct torque control had been introduced ,and then in the
MATLAB/ simulink environment , a simulation model of asynchronous motor direct torque
control system whose stator flux trajectory is approximation of a circular had been built ,and the
construction process of each link of the simulation model had been introduced in detail ,through which the feasibility of the method had been verified in theory.Finally the simulation
waveforms had been analyzed, the results that the system performance matches the expected
values had been shown, which verified the correctness of the simulation system.
Key Key Key Key Words: Words: Words: Words: direct torque control;space vector;simulation;matlab目录
1 绪论 .. 1
1.1 电机调速系统的发展 .. 1
1.2 电力电子元器件的发展 . 1
1.3 交流调速控制技术的发展  2
1.3.1 恒压频比控制与转差频率控制 .. 2
1.3.2 矢量控制 .. 2
1.3.3 直接转矩控制（ DTC ） . 3
1.3.4 自适应控制和智能控制在交流传动领域的应用 . 3
1.3.5 基于无速度传感器的交流传动控制技术 . 4 MATLAB基于直接转矩的异步电机调速系统仿真:http://www.751com.cn/zidonghua/lunwen_2222.html