Speed Sensorless Rotor Flux Estimation in Vector Controlled Induction Motor Drive
نویسنده
چکیده
This paper presents a speed sensorless rotor flux estimation algorithm in a vector controlled induction motor drive. The proposed method is based on observing a newly defined state which replaces the unknown terms containing rotor flux and speed on right hand side of the state equation of the motor. A new mathematical model of the motor is derived after introducing the above mentioned sate. Rotor flux estimation is achieved using a modified Blaschke equation obtained after introducing the new state into the Blaschke equation. Rotor speed is computed using a simple equation derived using the newly defined state. Key-words: Induction motor, vector control, flux estimation, speed estimation, reduced order observer.
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