直接转矩变结构控制的无速度传感器交流感应电机系统  

Sensorless Induction Machine Drives Based on Direct Torque Variable Structure Control

作　　者：肖海峰[1,2] 贺昱耀[1] 李凯[1] 

机构地区：[1]西北工业大学,陕西西安710072 [2]西安航空学院,陕西西安710000

出　　处：《微特电机》2014年第1期63-65,68,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(61271143);陕西省自然科学基金项目(2011K09-16)

摘　　要：针对无速度传感器的交流感应电动机调速系统,提出了直接转矩控制与变结构控制相结合的新型策略。该策略采用线性滑模控制作为转矩、磁链调节方式,实现电机宽调速范围下的精确、鲁棒控制;同时,分别在定子及旋转磁链坐标系下设计观测器用于定、转子磁链估计,并对定子电阻实施在线辨识以提高观测精度,磁链估计过程不依赖于转子速度分量,具有良好的鲁棒特性。理论分析和仿真结果证明了该方法具有控制精度高、鲁棒性强、动态响应快等特点。Based on the mathematical model of the induction machine,a direct torque and variable structure control of sensorless induction-motor drives were presented. The drive employed a new torque andd flux regulator of linear and variable structure,wblch realized accurate and robust control in the entire speed range. At the same time,the stator and rotor flux were estimated in the stationatT and rotating flax frame of axes respectively. The observers of the model contains a rotor- speed-dependent term behavior. In order to improve accurate state estimation of the flux, the feasible solution for on-line stator resistance identification was employed. Theoretical analysis and MATLAB simulation results confirm the robustness, accuracy mad quick response of the drive.

关 键 词：交流感应电机 无速度传感器控制 滑模观测器 直接转矩控制 变结构控制 

分 类 号：TM34[电气工程—电机]