异步电动机变结构模型参考自适应观测器设计  

A Novel Sensorless Vector Control Based on Variable Structure Model Reference Adaptive Observer for Induction Motor

作　　者：刘彬[1] 

机构地区：[1]辽宁石化职业技术学院,锦州121000

出　　处：《微特电机》2016年第12期93-97,共5页Small & Special Electrical Machines

摘　　要：为了提高异步电动机调速系统的动态品质,在传统等速趋近率的基础上设计了一种新型趋近律,该方法能够根据系统状态距离平衡点的远近而自适应调整等速趋近律速度,并将该方法应用于速度控制器的设计。另外,为了获得异步电动机的转速信息,设计了一种基于变结构模型参考自适应系统(Variable Structure Model Reference Adaptive System,VS-MRAS)的无传感器矢量控制系统,该方法将滑模速度控制器和VS-MRAS算法相结合,提出了一种适用异步电动机无传感器矢量控制系统的复合控制策略。仿真和实验结果表明,该算法能够有效地提高系统的静态、动态特性与鲁棒性。To improve dynamic quality of asynchronous motor speed servo system, a novel reaching law method was de- signed to solve the existing problem in traditional equal-speed reaching law, which could adaptively adjust according to the state variables＂ distance to the equilibrium position. Moreover, the principle of variable structure model reference adaptive system （VS-MRAS） was employed to obtain the rotor speed information based on asynchronous motor mathematical model, and the hybrid control technology combining with sliding-mode speed controller and VS-MRAS method was designed to im- prove the control performance, which was suitable for sensorless vector control of asynchronous motor speed servo system. Simulation and experiment results show that the novel hybrid controller can improve steady, dynamic performances and ro- bustness of speed servo system obviously, compared with traditional PI speed controller.

关 键 词：异步电动机 无传感器矢量控制 变结构模型参考自适应系统 趋近律方法 

分 类 号：TM343[电气工程—电机]