Communications - Scientific Letters of the University of Zilina 1999, 1(3):35-40 | DOI: 10.26552/com.C.1999.3.35-40

NFO speed control of induction motor without using shaft encoder

Petr Kadaník1
1 Department of Electrical Drives & Traction, Czech Technical University, Faculty of Electrotechnical Engineering, Czech Republic

This article focuses on the design and analysis of a speed-sensorless vector control of induction motor based upon a Natural Field Orientation (NFO). This method allows high-dynamic vector control of PWM VSI fed induction motor. The main merit of NFO is given by no requirement on any speed or position sensor. The presence of a tacho-generator or optical shaft encoder is commonly undesirable. These transducers significantly increase the costs and reduce the reliability and robustness of the overall system. The NFO method doesn't employ computationally extensive algorithms such as Model Reference Adaptive System or methods based on Kalman filter. Simulation results from a model-based computer-aided design approach using MATLAB/SIMULINK software will be presented.

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Published: September 30, 1999  Show citation

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Kadaník, P. (1999). NFO speed control of induction motor without using shaft encoder. Communications - Scientific Letters of the University of Zilina, 1(3), 35-40. doi: 10.26552/com.C.1999.3.35-40
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    References

    1. NOVOTNY, D. W. - LIPO, T. A.: Vector Control and Dynamics of AC Drives, New York 1996 Go to original source...
    2. JÖNSSON, R.: Natural Field Orientation (NFO) Provides Sensorless Control of AC Induction Servo Motors, PCIM Magazine, June 1995
    3. JÖNSSON, R. - LEONHARD, W.: Control of induction motor without a Mechanical sensor based on the principle of Natural Field Orientation, IPEC '95, April 1995, Yokohama

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