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:
Oct. 10, 2006
Filed:
Feb. 02, 2004
Alain Lacaze, Essert, FR;
Alain Lacaze, Essert, FR;
ALSTOM Technology Ltd., Baden, CH;
Abstract
A very simple and reliable process for cancelling the reaction field () induced by a rotor () is proposed, wherein the rotor () is rotating in a static magnetic field () in a static outer core (), and wherein the rotor () comprises at least two conductors () aligned substantially parallel to the axis () of the rotor (). The armature reaction () is cancelled by means of a set of auxiliary windings () located on the static outer core () wherein said auxiliary windings () are fed with a direct current (DC) cancelling the reaction field (). Preferentially, the process is applied to a brushless exciter and the auxiliary windings () have the same geometry as the conductors () of the rotor () and are all equally fed with a direct current corresponding to the current induced in the conductors () of the rotor () when the rotor is rotating in the static magnetic field ().