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:
Feb. 15, 2011
Filed:
Jun. 06, 2008
Tero Viitanen, Vantaa, FI;
Paulius Pieteris, Espoo, FI;
Esa Hautakorpi, Helsinki, FI;
ABB Oy, Helsinki, FI;
Abstract
A DC inductor comprising a core structure () comprising one or more magnetic gaps (), a coil () wound 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 DC inductor further comprises at least one magnetic slab () inserted to the core structure which forms the one or more magnetic gaps (), at least one supporting member () made of magnetic material extending from the core structure inside the core structure and supporting the at least one permanent magnet (), and that the at least one supporting member () is arranged to form a magnetic path for the at least one permanent magnet.