Robust adaptive control of induction motors without flux measurements

Presents robust adaptive control technique for induction motors. The method is robust to parameter variations and the stability analysis is much simpler than other approaches such as Marine´s adaptive input-output linearization method. Another main advantage of the authors´ method is that they only require a reduced-order system to be linearly parametrizable (LP); the rest of the system dynamics can be highly nonlinear with no LP requirement. Full state feedback is not needed for implementation. In particular, the rotor flux measurement is not needed which consequently eliminates one of the major disadvantages in most induction motor control schemes. Load torque and rotor resistance can be unknown but bounded