EP 0058905 B1 19841017 - TRANSFORMER OR INDUCTANCE COOLED BY INSULATING LIQUID, METHOD AND DEVICE FOR MANUFACTURING THEM
Title (en)
TRANSFORMER OR INDUCTANCE COOLED BY INSULATING LIQUID, METHOD AND DEVICE FOR MANUFACTURING THEM
Publication
Application
Priority
SE 8101197 A 19810224
Abstract (en)
[origin: US4477790A] An electrical inductive apparatus, for example a transformer or a reactor, comprises a core and at least one winding wound around the core and formed of a plurality of superimposed turns of sheet-formed electrically-conducting material. The winding includes at least one element which, together with a surface of at least one of the turns of the winding, defines a plurality of channels for conducting an electrically-insulating fluid in contact with a part of said surface. These channels are defined between adjacent pairs of a plurality of connected together elongated spacing means of the element which are arranged in substantially parallel spaced relationship and which contact said surface. Each spacing means has a thickness which increases from a central region of the spacing means towards each of its opposite ends. This enables the turns of the winding to be flared out at their opposite ends in a suitable manner with respect to the electrical properties of the winding. The element may be manufactured from a sheet of insulating material by profile sawing in a processor-controlled sawing machine.
IPC 1-7
IPC 8 full level
H01F 27/28 (2006.01); H01F 27/32 (2006.01); H01F 41/06 (2006.01); H01F 41/12 (2006.01)
CPC (source: EP US)
H01F 27/322 (2013.01 - EP US); H01F 41/125 (2013.01 - EP US); Y10T 29/4902 (2015.01 - EP US)
Citation (examination)
DE 3029416 A1 19810326 - ASEA AB [SE]
Designated contracting state (EPC)
BE CH DE FR GB LI
DOCDB simple family (publication)
EP 0058905 A1 19820901; EP 0058905 B1 19841017; CA 1182876 A 19850219; DE 3260979 D1 19841122; JP S57155711 A 19820925; NO 820539 L 19820825; SE 428979 B 19830801; SE 8101197 L 19820825; US 4477790 A 19841016; ZA 821169 B 19830126
DOCDB simple family (application)
EP 82101098 A 19820215; CA 396879 A 19820223; DE 3260979 T 19820215; JP 2803982 A 19820223; NO 820539 A 19820222; SE 8101197 A 19810224; US 35125582 A 19820222; ZA 821169 A 19820223