| Abstract |
The introduction of a micro-processor into a command loop permits us to envisage new control structures. In line with this, we propose to set up modern adjusters to control the electro-magnetic torque in the synchronous machine fed by a PMW inverter. The first technique, called STATE SPACE FEEDBACK, consists in decomposing the dynamics of the procedure into two time scales, and in giving a reduced-order action model. This reduced-state model serve as a base for the construction of a dynamic flux observer. We next develop a state space feedback allowing control of the transitory evolution of state variables in a speed variator. The second technique, called ADAPTIV CONTROL, is concerned with setting-up an self tunning regulator ensuring adaptation of the regulator's parameters at the function point. This technique requires a line identification procedure which permits knowledge of the different coefficients of the equivalent-transfer function. |
