Search

A non‐linear robust output feedback control is designed for a sixth‐order model of an induction motor. The control uses only measurement of the rotor position and stator currents. It contains two observers, a second‐order observer to estimate the rotor flux from the stator current and a third‐order high‐gain observer to estimate the rotor speed and acceleration from its position. The control is robust to uncertainties in the rotor and stator resistances, and a bounded time‐varying load torque. It guarantees that the speed tracking error can be made arbitrarily small by choice of certain design parameters. Moreover, when the speed reference and load torque and constant, it ensures asymptotic regulation. The controller is applied, via simulation, to a benchmark example. Copyright © 2000 John Wiley & Sons, Ltd.

Proposes a non-linear control method for speed regulation of induction motors. Features of induction motors; Findings of studies conducted.