Abstract
We extend current research in the area of 'sensorless' control of induction motors by presenting two observers based on first- and second-order sliding mode control theories for the simultaneous estimation of flux and speed. We base the observers on the stator-flux model of the motor instead of the usual rotor-flux model mainly because of the uncertain rotor resistance that plays a significant role in the latter. By designing the observers as if they are sliding mode controllers, we lend the properties of parameter insensitive closed-loop dynamics and finite time convergence to the stator flux and speed estimation schemes. We also present simulation and experimental results to validate the operation of the observers.
Original language | English |
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Pages (from-to) | 1457-1464 |
Number of pages | 8 |
Journal | International Journal of Control |
Volume | 83 |
Issue number | 7 |
DOIs | |
State | Published - Jul 2010 |
Keywords
- induction motors
- observers
- sliding mode control
- stator-flux model
- super twisting algorithm