三相感应电动机无速度传感器矢量控制系统中,电机参数变化(特别是转子电阻)影响矢量控制性能和速度辨识精度；而稳态下,由于转子磁链是常数,转速和转子电阻不能解耦,两者很难实现同时辨识.基于无速度传感器直接矢量控制系统,设计了独立于全阶状态观测器的积分改进型转子磁链观测器,动态时结合自适应递推最小二乘法对转子电阻进行辨识,系统能够在动态过程中实现对转速和转子电阻的同时辨识,该方法通过了仿真和实验验证.%In the speed sensorless control of the 3-phase induction motor,the machine parameters(especially rotor resistance) have a strong influence on the performance of vector control and precision of the speed estimation. In steady-state, it is known that the simultaneous estimation of the rotor speed and rotor resistance is impossible because the rotor flux is constant and rotor speed and rotor resistance can't be decoupled. A method of estimating simultaneously the motor speed and rotor resistance in the transient state based on direct field oriented vector control system without speed sensor was presented, and designed the modified integration of voltage flux observer which has no relationship with full-order observer and adaptive recursive least squares algorithm is used,and it is possible to estimate motor speed and rotor resistance simultaneously. The validity of the proposed method is verified by simulink and experiment.
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