【电力电子】【2007.05】三相异步电动机的滑模矢量控制

本文为印度RourkelaOrissa国立技术研究所&＃xff08;作者&＃xff1a;SOBHACHANDRA BARIK&＃xff09;的硕士论文&＃xff0c;共85页。

滑模控制&＃xff08;SMC&＃xff09;是一种基于改变控制器结构响应系统状态变化&＃xff0c;以获得期望响应的鲁棒控制方案。利用高速开关控制动作在控制器的不同结构之间进行切换&＃xff0c;使系统的轨迹在状态空间中沿着选定的开关流形运动。

本文提出了一种新的无传感器矢量控制方案&＃xff0c;一方面&＃xff0c;该方案克服了速度传感器的必要性&＃xff0c;另一方面提出了一种新的变结构控制律&＃xff0c;该律采用积分滑动面来补偿系统中存在的不确定性。提出了一种带有滑模控制器的间接磁场定向感应电动机驱动系统&＃xff0c;该设计包括从测量的定子端电压和电流估算转子速度。在间接矢量控制系统中&＃xff0c;估计的速度被用于反馈&＃xff0c;从而在不使用轴安装传感器的情况下实现速度控制。为了保证闭环系统的稳定性&＃xff0c;提出了基于李亚普诺夫理论的稳定性分析方法&＃xff0c;同时证明了该控制方案在负载扰动和参数不确定性条件下的高性能。

Sliding Mode Control (SMC) is a robustcontrol scheme based on the concept of changing the structure of the controllerin response to the changing state of the system in order to obtain a desiredresponse. A high speed switching control action is used to switch betweendifferent structures of the controller and the trajectory of the system is forcedto move along a chosen switching manifold in the state space. This thesis workpresents a new sensorless vector control scheme consisting on the one hand of aspeed estimation algorithm which overcomes the necessity of the speed sensorand on the other hand of a novel variable structure control law with anintegral sliding surface that compensates the uncertainties that are present inthe system. In this work, an indirect field-oriented induction motor drive witha sliding-mode controller is presented. The design includes rotor speedestimation from measured stator terminal voltages and currents. The estimatedspeed is used as feedback in an indirect vector control system achieving thespeed control without the use of shaft mounted transducers. Stability analysisbased on Lyapunov theory is also presented, to guarantee the closed loopstability. The high performance of the control scheme under load disturbances andparameter uncertainties is also demonstrated.

1 引言
2 感应电动机的建模与磁场定向控制
3 无传感器滑模矢量控制
4 结果与讨论
5 未来工作展望与结论
附录A 开环控制数据
附录B 滑模控制数据

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