基于改进MRAS观测器无速度传感器感应电机转速估计方法  

Improved Speed Estimation Method Based on MRAS Observer for Sensorless Induction Motor

作　　者：王高林[1] 于泳[1] 陈伟[1] 徐殿国[1] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001

出　　处：《电气传动》2009年第1期15-18,共4页Electric Drive

摘　　要：为了提高无速度传感器感应电机矢量控制系统的低速性能,提出了一种改进的转速估计方法。由于转速自适应观测器是一个具有非线性并且较复杂的模型,将两相静止坐标系中的观测器输出误差系统变换到转子磁场旋转坐标系中,通过推导出的单输入单输出误差系统来得到满足观测器稳定性条件。同时对定子电阻进行在线辨识以提高系统的鲁棒性,采用了一种改进的定子电阻自适应率。通过11 kW感应电机无速度传感器转子磁场定向矢量控制实验平台验证了所提出方案的有效性。An improved speed estimation method was proposed to improve the performance of sensorless vector controlled induction motor drives. The observer error system is translated into synchronous reference frame to avoid the nonlinear and complicated dynamics of the estimator. And the stability conditions can be a- chieved through the single-input and single-output error system. To improved robustness of the observer, the stator resistance is identified synchronously based on an improved adaptive mechanism. The feasibility of the proposed scheme is verified by the experimental results of speed sensorless field-oriented vector controlled 11 kW induction motor.

关 键 词：感应电机 模型参考自适应系统 转速估计 定子电阻辨识 

分 类 号：TM346[电气工程—电机]