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:
May. 18, 2004
Filed:
Jan. 24, 2003
Bertil Berggren, Vasteras, SE;
Mons Hölleland, Vasteras, SE;
Mats Leijon, Vasteras, SE;
Maria Lundmark, Vasteras, SE;
Ole-Morten Midtgård, Oslo, NO;
Bengt Rothman, Vasteras, SE;
Eivind Sande, Oslo, NO;
Marco Sipi, Vasteras, SE;
Roald Sporild, Vettre, NO;
Kirsti S. Svensen, Borgen, NO;
ABB AB, Vasteras, SE;
Abstract
For a method of operating of a synchronous compensator including a rotating electric machine including a rotor and a stator with at least one winding with a solid insulation enclosing the electric field, relevant parameters for temperature conditions in the rotor are determined, and during over-excited operation, to temporarily enlarge the field of operation of the synchronous compensator, cooling of the rotor is forced depending on a rotor temperature value determined from the parameters. The synchronous compensator measures parameters relevant for the temperature conditions of the rotor. A mechanism is also provided to force the cooling of the rotor depending on rotor temperature values determined from the parameters during over-excited operation of the electric machine.