DESIGN OF KALMAN FILTER FOR INDUCTION MOTOR DRIVE

Abstract

In this project, design and simulation of standard and extended versions of Kalman’s filter (KF) for rotor flux estimation in a voltage source inverter fed vector controlled induction motor drive is presented and described. The complete field oriented control scheme of the induction motor drive incorporating the KF, EKF is simulated in MATLAB for a 50 hp, 460V, 50Hz, 1440rpm squirrel-cage Induction Motor(IM). The performances of the proposed observer based IM drive are analyzed. The estimated results show that the EKF based Flux observer gives better performance of IM drive in comparison to the Standard Kalman’s Filter based observer. However its performance depends on an accurate choice of process and measurement noise covariance matrices. Methodology to create KF, EKF for online identification of induction motor parameters are also described in details.The Extended Kalman Filter can be used for combined state and parameter estimation by treating selected parameters as extr...