%0 Journal Article
%T 基于滑模变结构的异步电机直接转矩控制系统研究<br>Research on Asynchronous Motor Direct Torque Control System Based on Sliding Mode Variable Structure
%A 王剑平
%A 程攀
%A 张果
%A 向凤红
%A 毛剑琳
%J 机械科学与技术
%D 2015
%X 针对异步电机传统直接转矩控制系统转矩脉动过大,及电机参数变化和负载波动等因素使调速性能变差的问题,提出了用滑模变结构速度调节器代替传统的PI速度调节器,并根据异步电机在同步静止坐标系下的数学模型和滑模变结构理论设计了一种基于转矩误差和磁链误差的滑模控制器,利用获得的参考电压矢量,通过空间电压矢量调制得到逆变器开关控制信号。MATLAB仿真验证了该控制策略能有效减小转矩脉动和磁链脉动,在保证逆变器开关频率恒定的同时,对系统参数摄动和外部干扰表现出较强的鲁棒性。<br>On the fact of the torque ripple is larger in the traditional direct torque control(DTC)system of the asynchronous motor and the problems of speed performance is made slow by the changing motor parameters and the loading fluctuations,this article puts forward a new idea. In same words, the idea is that the traditional PI controller is replaced by speed controller of sliding mode variable structure (SMVS). What is more, according to the mathematical models of induction motor in synchronous rotation coordinates and control theory of sliding mode variable structure, we propose a new variable structure sliding mode controller based on torque and flux errors. Using the reference voltage vectors which are the outputs of the controller,the switching control signals of the inverter are generated by space vector PWM(SVPWM) technology. The MATLAB simulation verifies that the proposed control scheme significantly reduces torque and flux ripple,ensures the inverter switching frequency to be fixed,and it also has strong robustness to motor parameter and disturbance
%K 异步电机
%K 速度调节器
%K 滑模变结构
%K 直接转矩控制
%K 电压空间矢量&lt
%K br&gt
%K angular velocity
%K computer simulation
%K controllers
%K errors
%K lyapunov functions
%K mathematical models
%K MATLAB
%K motors
%K pulse width modulation
%K robustness (control systems)
%K sliding mode control
%K switching frequency
%K torque control
%K trajectories
%K variable structure control
%K vectors
%K asynchronous
%K control system
%K loading
%K robustness
%K sliding mode variable structure
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6244.shtml