新型无传感器感应电动机直接转矩控制系统

Direct torque control system of a new type of sensorless induction motor

针对电机安装机械传感器不便的问题提出了新的速度辨识方法.从自适应控制原理和扩展卡尔曼滤波算法原理入手,将这两种不同的观测器应用于异步电机直接转矩控制,并对其进行研究和比较,找出各自的优缺点,利用Matlab/Simulink构建了系统的模型并进行仿真研究.结果表明:在负载变化、噪声抑制等方面EKF优于MARS;在状态观测方面,采用MARS优于EKF.

In terms of the inconvenient problem of motor installation mechanical sensor, a new speed identifi- cation method was put forward. Starting with the adaptive control principle and extended Kalman filtering al- gorithm principle, the two different observers were applied to induction motor direct torque control, and through the research and comparison, their advantages and disadvantages were found out. Using Matlab/ Simulink to construct the system model and the simulation, the results show that in the load change, noise suppression, etc is better than that of EKF MARS, while in the state observation, the MARS is better than that of EKF.