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. 11, 2011
Filed:
May. 19, 2008
Applicants:
Tero Viitanen, Vantaa, FI;
Paulius Pieteris, Espoo, FI;
Inventors:
Tero Viitanen, Vantaa, FI;
Paulius Pieteris, Espoo, FI;
Assignee:
ABB Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 21/00 (2006.01); H01F 17/06 (2006.01); H01F 27/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
A DC inductor comprising a core structure () comprising one or more magnetic gaps (), a coil () inserted on the core structure (), at least one permanent magnet () positioned in the core structure, the magnetization of the permanent magnet () opposing the magnetization producible by the coil (). The core structure is adapted to form a main flux path and an auxiliary flux path, where the main flux path is adapted to carry the main magnetic flux producible by the coil, wherein the auxiliary flux path comprises a magnetic gap and is adapted to lead magnetic flux past the at least one permanent magnet ().