| Abstract |
The development of microprocessor-based control systems, of power semiconductors and of advanced control techniques has made it possible to obtain induction motor drives which are able to give a maximum power nearly constant in a large variation range of the speed and are characterized by a dynamic behavior much better than that of corresponding d.c. motor drives. To this end, field oriented control techniques have been used. The direct implementation of the field oriented control requires the determination of the rotor flux components, these later are
generally obtained by a state observer. The availability of an observer, characterized by a reduced sensitivity to the parametric variations, has aroused interest to use also more sophisticated control strategies based on exact linearization of the machine model by a non-linear feedback. After a short description of an approach that makes it possible to obtain a fully linearized model of the induction machine, the paper inquires into the possibility to identify some drive parameters by the adaptation mechanism. |
