Abb Research Ltd.

Abb Ab

Hitachi Energy Ltd

Hitachi Energy Switzerland Ag

Abb Schweiz Ag

Abb Power Grids Switzerland Ag

Nkt Hv Cables Gmbh

Rongsheng Liu

Gunnar Russberg

Olof Hjortstam

Christian Sasse

Rudi Velthuis

Patrick Meier

Mikael Dahlgren

Orlando Girlanda

Santanu Singha

Pan Min

Li Ming

Par Holmberg

Robert Sekula

Julia Viertel

Jedrzej Banaszczyk

Albert Jaksts

Leif A Pettersson

Tomasz Nowak

Bartlomiej Adamczyk

Marco Schneider

Anneli Jedenmalm

Johan Nyberg

Michal Kozupa

Sung-Woo Cho

Gerhard Brosig

Svante Söderholm

Gunilla Eken, Legal Representative

Vijaya Chandramouli

Katarina Wigginton

Harald Martini

Sung-Wo Cho

Bin Ma

The present disclosure relates to a support structure for at least one winding of an inductive device, in particular a power transformer, comprising a press structure configured to transfer and distribute an compression force from a holding structure to the at least one winding, an insulator structure configured to electrically insulate the holding structure from the at least one winding, and a coolant flow structure configured to guide and distribute a flow of a liquid coolant to or from different parts of the at least one winding. The press structure, the insulator structure and the coolant flow structure are formed as one integrated part comprising a polymer material. The integrated part comprises a plurality of orifices for passage of the liquid coolant from a first side facing the holding structure to a second side facing the at least one winding.

Support structure for at least one winding of a power transformer, power transformer and method for manufacturing

The present disclosure relates to a high-voltage (HV) bushing comprising a condenser core configured for surrounding a HV electrical conductor. The condenser core comprises an insulation material comprising wound layers of a permeable solid material impregnated with a thermo-reversible gel. The gel comprises an oil and a thickener, the oil comprising iso-paraffinic oil in an amount within the range of 0.1-100 wt % of the oil and the thickener comprising at least one copolymer in an amount within the range of 0.1-10 wt % of the gel.

Gel impregnated bushing

A direct current transmission system and a method for preparation including an electrical conductor layer, an inner semiconductive layer covering the conductor layer, an insulation layer provided on the semi-conductive layer including laminated polymer material and impregnated with a high viscosity fluid, and including an inner part, a middle part, an outer part, and an outer semi-conductive layer covering the insulation layer. The inner part has a first thickness, the middle part has a second thickness and the outer part has a third thickness, whereby the second thickness is greater than the first thickness and greater than the third thickness. The laminated polymer material within each part has a constant thickness and constant ratio of polymer to laminated material and wherein at least one of the parts has a thickness ratio of less than 35%.

Direct current (DC) transmission system comprising a thickness controlled laminated insulation layer and method of manufacturing

An electric insulation material for an electric device includes one or several electrical conductors and an electric insulation material arranged around the conductor or between the conductors, which insulation material is impregnated with a dielectric insulation liquid. The electric insulation material includes a main layer that is provided with a surface layer that has a dielectric constant that is lower than the dielectric constant of the main layer.

Electric insulation material, an electric device comprising the insulation material and a transformer

A distributed air gap material for a induction device in power systems for minimizing fringe losses, mechanical losses and noise in the core The distributed air gap material occupies a selected portion of the core and is formed of a finely divided magnetic material in a matrix of a dielectric material particles. The air gap material has a zone of transition in which the permeability values vary within the air gap material.

Induction devices with distributed air gaps

Growing community of inventors

Västerås, Sweden

Rongsheng Liu