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:
Jul. 10, 2007
Filed:
Jul. 21, 2003
Applicants:
Håkan Swahn, Oskarshamn, SE;
Bertil Svensson, Västervik, SE;
Inventors:
Håkan Swahn, Oskarshamn, SE;
Bertil Svensson, Västervik, SE;
Assignee:
Sydkraft AB, Malmö, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02D 3/00 (2006.01); F02D 29/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and an apparatus are described for monitoring a rotating synchronous electric machine (), which comprises a rotor winding and a stator having a stator winding. The method comprises the steps of determining the stator winding current, determining the stator winding voltage, determining the rotor winding current, and estimating the temperature in at least two positions in the electric machine () using a model of the electric machine and the determined current and voltage values. An apparatus according to the invention is provided for carrying out the method.