The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
Aug. 01, 1991
Jean Bavard, Lyons, FR;
Liming Wei, Villeurbanne, FR;
GEC Alsthom SA, Paris, FR;
Abstract
A method is provided for asynchronous motor control by closed-loop variation of magnetic induction flux as a function of a desired value in which the closed-loop variation includes flux measurement on the basis of measurement of motor voltage and current and determination of a measured flux value obtained using said measurements and characteristic parameters of said motor in accordance with the motor operating equations, the method including the steps of obtaining the measured flux for an arbitrarily fixed value of at least one of said parameters wich may significantly differ from the actual value thereof and of then correcting the desired value in order to compensate for this possible difference.