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. 07, 2008
Filed:
Dec. 27, 2005
Applicant:
Mats AF Klercker Alakula, Käviinge, SE;
Inventor:
Mats AF Klercker Alakula, Käviinge, SE;
Assignee:
Forskarpatent I SYD AB, Lund, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 15/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a transformer being protected against direct current induced by geomagnetic flux changes, so called zero sequence current, whereby it comprises at least one compensation winding for direct current on the transformer core to compensate for undesired magnetization, by adding a current opposite to the direction of the magnetization caused by the zero sequence current carried by the alternating current to be transformed to reduce high magnetization saturation levels.