Abb Ab

Abb Research Ltd.

Asea Brown Boveri Ab

Swedish Neutral Ab

Thorsten Schütte

Christian Sasse

Mats Leijon

Udo Fromm

Par Holmberg

Peter Carstensen

Andrew Maxwell

Leif A Pettersson

Klaus Winter

Albert Jaksts

Jan Brangefalt

Christer I Törnkvist

Tommaso Auletta

A device including a corona shield, and at least one support element for connecting the corona shield to a high voltage apparatus. The at least one support element includes a semiconducting polymer, which, when in operation, acts as a resistance between the corona shield and the high voltage apparatus. Furthermore the support element is arranged to fix the corona shield to the high voltage apparatus.

Device for decreased risk of dielectric breakdown in high voltage apparatuses

The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f, and a second stator connected to a second AC network with a second frequency f. The converter also comprises a rotor means which rotates in dependence of the first and second frequencies f, f. The stators each comprises at least one winding, wherein each winding comprises at least one current-carrying conductor, and each winding comprises an insulation system, which comprises on the one hand at least two semiconducting layers, wherein each layer constitutes substantially an equipotential surface, and on the other hand between them is arranged a solid insulation.

Rotating asynchronous converter and a generator device

A power or regulating transformer with voltage regulator includes regulating windings made of a flexible conductor having an electric field containing mechanism that forces the electric field due to the current in the winding to be contained within the flexible conductor. Since virtually no electric field is to be found outside the flexible conductor of the regulating winding, the regulating winding may be formed without having to consider the electric field distribution, thus providing for a transformer with a favorable regulating winding design.

Transformer with voltage regulating means

A rotating asynchronous converter for connection of AC network with equal or different frequencies employs a first stator connected to a first AC network with a first frequency and a second stator connected to a second AC network with a second frequency, and a rotor which rotates in response to the first and second frequencies. The converter has at least one winding formed of a cable, including a conductor and a magnetically permeable, electric field confining insulating covering surrounding the conductor.

A power transformer having at least one high voltage winding and one low voltage winding. Each of the windings includes at least one current-carrying conductor, a first layer having semiconducting properties provided around said conductor, a solid insulating layer provided around said first layer, and a second layer having semiconducting properties provided around said insulating layer. The windings are intermixed such that turns of the high voltage winding are mixed with turns of the low voltage winding.

Transformer

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Västerås, Sweden

Thorsten Schütte