ABSTRACT
The doubly fed induction motor (DFIM) can be controlled from either a stator or a rotor voltage sid;, however, controlling the motor from the rotor voltage side using field-oriented control leads to undesirable oscillations at the output of the mechanical speed even by increasing the Proportional integral controller gains. A robust nonlinear controller is applied to a reduced dynamical model of doubly fed induction motor, which is based on the input-output feedback linearization technique to enhance the performance of the motor, and since the load torque is unmeasured and has to be compensated using observers. The wound rotor doubly fed asynchronous machine has been the subject of most research primarily for its operation as a generator in applications of wind energy. The chapter describes a Multi-input Multi-output robust nonlinear controller based on the technique of linearization to adjust the speed of the DFIM is introduced and applied with a load torque observer in order to estimate the unmeasured load disturbance.
