摘要
直接转矩控制技术(DTC)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(Bang-Bang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。主要介绍了三相异步电动机直接转矩控制系统的控制原理,基于Matlab仿真平台建立三相异步电动机直接转矩控制系统的整体仿真模型以及该系统各组成的仿真模型。通过对轨迹的观测,检测是否达到控制要求,以检验直接转矩控制的效果。最后对仿真图进行分析,验证直接转矩控制技术的有效性和可靠性。
Direct torque control （DTC） wi th space vector anal ysi s method directly calculates and con-trols the torque and flux linkage of the motor under the stator coordinate;using stator magnetic field orien-tation and generating pulse width signal by discrete two-point control （Bang-Bang control）,the inverter switch state is directly under optimal contrl to obtain high dynamic performance of the torque.Introducing the control principle of direct torque control system of three -phase asynchronous motor,the simulation models of the whole and each part of three-phase asynchronous motor direct torque control system is es-tablished based on Matlab simulation platform.Through the observation to the trajectory,checking whether the control reauirements are satisfied,as to examine the effects of direct torque control.Finally, the simula-tion graph is analyzed to verify the effectiveness and reliability of the direct torque control technology..
出处
《微处理机》
2017年第6期78-81,共4页
Microprocessors
关键词
异步电机
直接转矩控制
定子磁链
空间矢量
MATLAB仿真
可靠性
Asynchronous motor
Direct torque control
Stat or flux l inkage
Space vector
Matlab sim-ulation
Reliability
