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:
Mar. 22, 2011
Filed:
Nov. 02, 2004
Jochen Mast, Heidelberg, DE;
Jean Schutz, Heidelberg, DE;
Jens Helfrich, Speyer, DE;
Guntram Scheible, Hirschberg, DE;
Colin Luthardt, Vaesteras, SE;
Jochen Mast, Heidelberg, DE;
Jean Schutz, Heidelberg, DE;
Jens Helfrich, Speyer, DE;
Guntram Scheible, Hirschberg, DE;
Colin Luthardt, Vaesteras, SE;
ABB Research Ltd, Zurich, CH;
Abstract
The invention relates to a variable transformer comprising at least one primary winding and at least one secondary winding which can be rotated in relation thereto. The primary winding and the secondary winding are subdivided into at least two winding sections. The winding sections interlock in a comb-like manner and the flow of current of directly opposite winding sections is directed in the respective opposite direction.