Observers of the state of asynchronous electric drive based on the Kalman filter

In asynchronous electric drive control systems, a vector method of variable control is used to increase dynamic performance. At the same time, in order to reduce the cost of the control system, it is advisable to use various observers of the state of the coordinates of the electric drive. The purpose of the work is to study the operation of the Kalman filter as an observer of the state of variables of an asynchronous motor, as well as to check its sensitivity to variations in the parameters of the control object. To achieve this goal, methods of the theory of automatic control, including the method of state variables, were used. Numerical studies of processes in the identification system under development were performed in the MATLAB computing environment (SIMULINK application software package). The conducted studies have shown that the quality of the status identifier of an asynchronous motor having the lowest sensitivity to variations in its parameters is the Kalman filter in the variable stator current - rotor flow coupling, which makes it possible to recommend it for use as a state observer in sensorless asynchronous electric drive systems with vector control.