DSP based sensorless control for induction motor using extended Kalman filter

This paper presents a method to realize the sensorless control of an induction motor using extended Kalman filter (EKF). With this method, the speed of an induction motor and rotor flux can be estimated based on the measured stator currents and voltages. The estimated speed is used for vector control and overall speed control. A DSP chip (TMS320F240) especially designed for controlling motors is used to enhance the performance of the control system. Simulations and experiments of the speed control for induction motor have been carried out to validate the speed estimation algorithm. The results of experiments show that the performance of the speed estimation is very good