Abb Research Ltd.

Abb Schweiz Ag

Abb Technology Ag

Abb Power Grids Switzerland Ag

Abb Corporate Research Ltd.

Hitachi Energy Switzerland Ag

Martin Carlen

Benjamin Weber

Felix Greuter

Jens Tepper

Frank Cornelius

Lars Liljestrand

Marcos Bockholt

Lise Donzel

Xavier Kornmann

Thorsten Steinmetz

Tommy Holmgren

Charles W Johnson

Andrej Krivda

Burak Esenlik

Bernardo Galletti

Arthouros Iordanidis

Jasmin Smajic

Thomas Christen

Yong Wang

Wolfgang Mönig

Michael Luckey

Andrzej Rybak

Henning Fuhrmann

Jedrzej Banaszczyk

Jong-Yun Lim

Stéphane Schaal

Christian Ohler

Dierk Bormann

Karel Bilek

Hans-J&uuml;rg Wiesmann

Peter Br&uuml;esch

Joseph Connolly

Dennis Young-Cannon

Irma Buschmann

Jiahua Zhang

Claudio Ibarra

Lukasz Bachorz

Philipp Buttgenbach

Lars E Schmidt

Yong Wand

Philipp Buttenbach

Thomas Hartmann

Joel Kern

A longitudinal voltage regulator includes: a voltage source for generating an additional voltage; and a transformer for coupling the additional voltage into an input voltage. The transformer both generates the additional voltage and couples the additional voltage into the input voltage. In an embodiment, the transformer has an input winding and an output winding.

Longitudinal voltage regulator

A dry transformer load switch, and transformer having such switch, has a hollow insulation cylinder extending longitudinally about a virtual center axis and has a plurality of connection contacts arranged along the inner circumference thereof, and a radially oriented main contact arranged in the interior of the hollow insulation cylinder so as to be rotatable about the center axis and which, with a corresponding rotary movement, can be optionally electrically connected by the radially outer end thereof to one of the connection contacts. In a hollow-cylindrical space about the center axis that is defined by the radially inner and outer end of the main contact, there is a barrier shield, which can be rotated together with the main contact about the axis.

Dry transformer load switch

A transformer arrangement and transformer for mitigating transient voltage oscillations. The transformer included a transformer core enclosing at least one core leg. A winding is wound around one of the at least one core leg. The winding extends from a first winding terminal to a second winding terminal and includes a first winding section along a first conductor extending from the first winding terminal to a first intermediate end point, and a second winding section along a second conductor extending from a second intermediate end point to the second winding terminal. The transformer arrangement further includes an external passive electric component connected between the first intermediate end point and either the second intermediate end point or the second winding terminal arranged to decrease an effective difference between capacitive and inductive voltage distributions between the intermediate end points such that transient voltage oscillations in the winding are mitigated.

Transformer arrangement for mitigating transient voltage oscillations

An on-load tap-changer for dry transformers, having an electric insulating hollow casing extending around a virtual axis, wherein several electric contact sections are foreseen along a path on the inner surface of the hollow casing, which are electrically joined through the wall of the hollow casing and a selector contact in the inner of the cylinder which is moveable along the path and that's outer end is selectively connectable with one of the contact sections by a respective movement. Respective cables are foreseen to electrically connect the contact sections from the radial outer side of the hollow casing, wherein at least some of the cables have a respective surrounding outer insulation at least at their respective connected end.

On-load tap changer for dry transformers and dry transformer

According to an embodiment, the invention provides a voltage control system for medium voltage applications. The voltage control system provides a booster-transformer and a feeder-transformer, each of the booster-transformer and the feeder-transformer having a respective primary winding and a secondary winding, wherein the secondary winding of the feeder-transformer is electrically connected with the primary winding of the booster-transformer by an intermediate circuit. The voltage control system also includes a connection device configured to connect the secondary winding of the booster transformer with an electrical energy supply network in order that the secondary winding of the booster transformer is connected in series with a transmission line having a voltage that is to be controlled.

Voltage control system

A transformer and a method of manufacturing a transformer are disclosed. The transformer can include a transformer core with at least three core limbs which are arranged in parallel with respect to one another and perpendicular to corner points of an area spanned by a polygon, and wherein axial end regions of each of the at least three core limbs transition into a respective yoke segment arranged transversely with respect to the axial end regions. Main windings can be arranged around each of the at least three core limbs in a hollow-cylindrical winding region. A magnetic cross section of a respective core limb can be greater than a magnetic cross section of the respective yoke segment. Additional windings can be electrically connected to a respective main winding and can be arranged around each of the respective yoke segments.

Transformer

The disclosure relates to an amorphous transformer core including at least one transformer core disc with a plurality of layers of strip-like amorphous core material arranged concentrically around at least one winding window. At least one heat dissipating plate extends into an interior of the amorphous transformer core and is fed from there into at least one heat exchange region outside the amorphous transformer core. This can enhance dissipation of heat energy which is produced inside the amorphous transformer core.

Amorphous transformer core

A transformer of dry design is disclosed having a core composed of amorphous material, which is sensitive to mechanical loads, having at least one winding former which surrounds the core and is in each case formed from at least one primary winding and secondary winding, and having at least one holding apparatus. A method for transformer production is also disclosed, wherein the holding apparatus is used to fix the at least one primary winding and secondary winding in each case and for this purpose it acts on each of the end faces of the at least one winding former.

Power transformer with amorphous core

An electrical transformer is disclosed which includes an enclosure; a magnetic core assembly arranged within the enclosure, the magnetic core assembly having a first core limb, a second core limb and a third core limb; and three coil assemblies having a first coil assembly, a second coil assembly, and a third coil assembly. At least two diaphragms are arranged within the enclosure, the diaphragms being essentially sealed to a first outermost coil of the first coil assembly, and arranged for guiding a cooling fluid in series through a first inner fluid duct, a second inner fluid duct, a third inner fluid duct and an extra-coil volume along outsides of third, second and first outermost coil coils of the third, second and first coil assemblies.

Electrical transformer with diaphragm and method of cooling same

an exemplary film includes a base having an electrically insulating polymer which carries on one or both surfaces a sequence of electrically conductive coated areas which are separated by non-coated interstices. The film, which can include a superposition of films arranged one above another, can be shaped to form a capacitor. The capacitor can include a plurality of parallel electrodes which are insulated from each other. Each electrode can include one or more electrode layers formed by the coated areas that are separated by dielectric layers formed by sections of the base.

Film, a capacitor, a voltage transformer and a method of using a capacitor

The capacitor according to the invention is wound from at least one film ( ) comprising a carrier film ( )&mdash;serving as dielectric&mdash;with at least one conductor layer ( ). It has an internal series circuit. The latter is brought about by the conductor layer ( ) applied on the dielectric or the conductor layers being divided into sectors ( ) which are mutually arranged and, if appropriate, connected to one another in such a way that a plurality of series-connected elementary capacitors are formed. It is distinguished essentially by the fact that a current path structure is formed on the sectors, the conductor layer ( ) having a high sheet resistance for the purpose of reducing breakdown-governed capacitance losses and the current paths ( ) of the current path structure having a significantly reduced sheet resistance for the purpose of reducing the total sheet resistance.

Film capacitor and film for a film capacitor

Foil for a foil capacitor and foil capacitor

A capacitor electrode includes a film base member having connection means located thereon so that the capacitor electrode may be connected to an external component, and a segmented metallized layer connected to the connection means, the metallized layer being made of metallized segments interconnected by current gates. The segmented,metallized layer has a thickness which varies or differs continuously along a length thereof, and the current gates have a width which increases as the thickness of the segmented metallized layer decreases.

Electronic components

Growing community of inventors

Niederrohrdorf, Switzerland

Martin Carlen