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:
Nov. 04, 2008
Filed:
Feb. 01, 2008
Philippe Stefanutti, Choisy, FR;
Harry Zueger, Chatelaine/Geneva, CH;
Nicolas Hugo, Geneva, CH;
Georges Dormia, Douvaine, FR;
Bernard Descollaz, Annemasse, FR;
Philippe Stefanutti, Choisy, FR;
Harry Zueger, Chatelaine/Geneva, CH;
Nicolas Hugo, Geneva, CH;
Georges Dormia, Douvaine, FR;
Bernard Descollaz, Annemasse, FR;
ABB Technology AG, Zurich, CH;
Abstract
The present disclosure is concerned with a multilevel converter including a transformer arrangement comprising at least two transformer units, each with primary and secondary windings and a transformer core structure. The latter are merged into one shared transformer core comprising at least one return limb that is part of the closed magnetic flux paths of the at least two transformer units. Sharing return limbs among individual transformer units, in particular when fed with primary voltage signals that have a certain phase shift between each other, helps to reduce the volume and weight as compared to an individual transformer core structure for each of the transformer units. The multilevel converter is beneficially used in railway traction applications.