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AssigneeC.R.F. Societa Consortile per Azioni
InventorsRoberto Maceratini, Giovanni Barba
Estimating the term…
The control device carries out a control of the induction machine based upon a flux estimation performed by means of a Luenberger state observer, the estimation error of which can be defined by means of a matrix having a plurality of eigenvalues, the magnitude of each of which is proportional to the magnitude of a respective pole of the induction machine, and the phase of each of which is rotated with respect to the phase of the corresponding pole of the induction machine by a given angle of rotation.
A control device (4) for a wide speed range induction machine (1), carrying out a control based upon a flux estimation performed by means of a Luenberger state observer (6), said induction machine (1) having a plurality of poles (p), and said Luenberger state observer (6) having an estimation error definable by means of a matrix (Ao) having a plurality of eigenvalues (po), the magnitude of each of the eigenvalues (po) of said estimation-error matrix (Ao) being correlated to the magnitude of a corresponding pole (p) of said induction machine (1);
A method for positioning the eigenvalues (po) of a Luenberger state observer (6) implemented in a control device (4) for a wide speed range induction machine (1) to perform an estimation of the flux of said induction machine (1), said induction machine (1) having a plurality of poles (p), and the estimation error of said Luenberger state observer (6) being definable by means of a matrix (Ao) having a plurality of eigenvalues (Po), said method comprising the step of correlating the magnitude of each of the eigenvalues (po) of said estimation-error matrix (Ao) to the magnitude of a method being characterized in that it further comprises the step of modifying the phase of each of the eigenvalues (po) of said estimation-error matrix (Ao) with respect to the phase of the corresponding pole (p) of said induction machine (1) according to a pre-set relation.
Dependencies are inferred from the claim text.