滑模变结构在异步电机DTC中的一种应用  

An Application of Sliding Mode Variable Structure in the DTC of Induction Motor

作　　者：杨欣[1] 吕振[1] 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105

出　　处：《微计算机信息》2011年第5期44-46,共3页Control & Automation

摘　　要：本文使用了一种新的基于滑模变结构的异步电机直接转矩控制技术。采用滑模变结构控制器来产生控制所需的任意大小和方向的电压空间矢量,取代传统DTC所采用的以滞环控制器和开关表来选择几个固定大小和方向的电压矢量的方法。并且采用基于滑模变结构的SMPWM来代替传统的SVPWM。这些技术的采用,使异步电机DTC系统的稳态和动态性能,以及对参数变化的鲁棒性得到极大提高,极大的改进了DTC的转矩脉动问题。本文前面先对该技术的算法原理进行阐述,然后使用Matlab/Simulink进行仿真验证。由结果可知本算法能够极大提高系统性能,理论分析正确。This paper presents a new DTC technique of induction motor based on sliding mode variable structure.It uses sliding mode controller to produce the desired voltage vectors which can have any size and direction.Instead of using hysteresis controller and switch table to produce the few fixed voltage vectors which the traditional DTC use.In addition,use SMPWM instead of conventional SVPWM.Due to the using of all techniques above,the steady and dynamic performance and the robust against the change of parameters are improved significantly,and the torque ripple is reduced highly.In this paper,first,describe the principle of this technique.Then,test it using Matlab/Simulink.The simulation results prove that this technique is accurate,and it can improve the performance significantly.

关 键 词：异步电动 直接转矩控制 滑模变结构控制 仿真 

分 类 号：TM921[电气工程—电力电子与电力传动]