EP 2905792 B1 20160921 - Device for reducing a magnetic unidirectional flux component in the core of a transformer
Title (en)
Device for reducing a magnetic unidirectional flux component in the core of a transformer
Title (de)
Vorrichtung zur Verringerung eines magnetischen Gleichfluss-Anteils im Kern eines Transformators
Title (fr)
Dispositif de réduction d'une part de flux continu magnétique dans le noyau d'un transformateur
Publication
Application
Priority
EP 14154070 A 20140206
Abstract (en)
[origin: WO2015117708A1] The invention relates to an apparatus for reducing a magnetic unidirectional flux component in the core of a transformer with at least three legs, in particular a three-phase transformer comprising at least one compensation winding per transformer leg, wherein the compensation windings are magnetically coupled to the core of the transformer. The apparatus is characterized in that - two compensation windings (K1-1, K1-2; K2-1, K2-2; K3-1, K3-2) are provided per leg, in each case the first compensation windings (K1-1, K2-1, K3-1) of a leg are connected together electrically in a first delta connection (1), - in each case the second compensation windings (K1-2, K2-2, K3-2) of a leg are connected together electrically in a second delta connection (2), - wherein the compensation windings (K1-1, K1-2; K3-1, K3-2) of at least one leg have different numbers of windings, - and wherein at least one switching unit (T) is arranged in series with the compensation windings for phase angle control.
IPC 8 full level
H01F 27/38 (2006.01); H01F 27/42 (2006.01); H01F 29/14 (2006.01); H03H 7/01 (2006.01); H03H 7/09 (2006.01)
CPC (source: EP US)
H01F 27/28 (2013.01 - US); H01F 27/38 (2013.01 - EP US); H01F 27/42 (2013.01 - EP US); H01F 29/14 (2013.01 - EP US); H01F 2029/143 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2905792 A1 20150812; EP 2905792 B1 20160921; CN 105993056 A 20161005; CN 105993056 B 20180119; EP 3103125 A1 20161214; US 10424435 B2 20190924; US 2017213643 A1 20170727; WO 2015117708 A1 20150813
DOCDB simple family (application)
EP 14154070 A 20140206; CN 201480075006 A 20141217; EP 14815679 A 20141217; EP 2014078173 W 20141217; US 201415117138 A 20141217