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Senserless Speed and Position of Direct Field Orientation Control Induction Motor Drive

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Author(s): Mohammed Khalil Hussain

Journal: Al-Khawarizmi Engineering Journal
ISSN 1818-1171

Volume: 8;
Issue: 4;
Start page: 9;
Date: 2012;
Original page

Keywords: Sensorless | Direct Field Orientation Control | Kalman Filter | Complete order extended kalman filter | reduced order extended kalman filter.

ABSTRACT
Direct field-orientation Control (DFOC) of induction motor drives without mechanical speed sensors at the motor shaft has the attractions of low cost and high reliability. To replace the sensor, information on the rotor speed and position are extracted from measured stator currents and from voltages at motor terminals. In this paper presents direct field-orientation control (DFOC) with two type of kalman filter (complete order and reduced order extended kalman filter) to estimate flux, speed, torque and position. Simulated results show how good performance for reduced order extended kalman filter over that of complete order extended kalman filter in tracking performance and reduced time of state estimation.
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