未知负载和转子电阻的交流感应电机自适应控制

Adaptive Control of Induction Motors with Unknown Load and Rotor Resistance

基于自适应观测控制器设计了三相交流感应电机调速系统,该控制器在未知电机转子电阻和负载及不需要测量磁链情况下,可同时且不受限制地单独控制电机转速(转矩)和磁链.控制器只测量转速、电压和电流信号自适应估计磁链和未知参数.用该控制方法设计了两相坐标轴磁场定向电机模型,系统不存在非线性,因此适合离散化和DSP系统的数字实现.

An observer based adaptive controller is designed for variable speed three phase AC induction motors. The proposed controller allows for simultaneous and independent control of the speed （torque） and the flux of the motor without requiring the measurement of the flux, and without the knowledge of the rotor resistance and the motor load. The controller adaptively estimates the flux variables and the unknown parameters, using only the measured speed, voltage and current signals. The control strategy is designed for the equivalent two phase field oriented model of the motor. Therefore,it does not have stiff nonlinearities and,hence,it is suitable for the discretization and digital implementation with DSPs.