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:
Dec. 07, 2010
Filed:
Jul. 03, 2008
Nicklas Södö, Vaasa, FI;
Nicklas Södö, Vaasa, FI;
Vacon Oy J, Vaasa, FI;
Abstract
DC choke arrangement of a power transformer, especially of a frequency converter, provided with a DC circuit and connected to an AC electricity network, to limit the harmonics of the network current taken by an appliance from the AC network, in which DC choke arrangement is at least one choke (Ldc+, Ldc−), which is arranged in the magnetic core, which contains pillar parts and yoke parts (), in which one or more permanent magnets () are arranged in the magnetic core of the choke, and in which the permanent magnet is positioned at an angle with respect to the longitudinal direction of the part or parts of the magnetic core such that the cross-sectional area of the permanent magnet is greater than the cross-sectional area of the part of the magnetic core in question or the parts of the magnetic core in question.