Rotating asynchronous converter
AssigneeABB AB
InventorsMats Leijon, Thorsten Shütte, Christian Sasse, Udo Fromm, Stefan G. Johansson
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Abstract
A rotating asynchronous converter and a generator device having a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second frequency f2. The converter has a rotor which rotates in dependence of the first and second frequencies f1, f2. The stators each have at least one winding formed of at least one current-carrying conductor, and an insulation system, formed of semiconducting layers each forming an equipotential surface, and a solid insulation between the semiconducting layers.
Claims36
A rotating asynchronous converter for connection of AC networks with equal or different frequencies, wherein the converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second frequency f2, wherein the converter also comprises a rotor which comprises two electrically and mechanically connected rotors, which are concentrically arranged with respect to said stators, and which rotates in dependence of the first and second frequencies f1, f2, and said converter further comprises an auxiliary device connected to said rotor, and in that at least one of said stators includes at least one winding forming at least one uninterrupted turn, said winding including a current-carrying conductor comprising a plurality of insulated conductive elements and at least one uninsulated conductive elements, and a magnetically permeable, electric field confining insulation covering surrounding the conductor, including an inner layer having semiconducting properties in electrical contact with the conductor, an insulation layer surrounding the inner layer in intimate contact with the inner layer and an outer layer having semiconducting properties surrounding the insulation layer and in intimate contact with the insulation layer, wherein each layer constitutes substantially an equipotential surface.
A generator device operable with variable rotational speed, wherein the generator device comprises a cylindrical stator connected to an AC network with a frequency f2, a first cylindrical rotor connected to a turbine, which rotates with a frequency f1, wherein said generator device comprises a rotor means being rotatable in dependence of the frequencies f1, f2, and said generator further comprises an auxiliary device mechanically connected to said rotor means, which rotor means comprises a first rotor and a second rotor, which rotors are hollow and electrically and mechanically connected, wherein said first rotor is arranged concentrically around said first cylindrical rotor and said second rotor is arranged concentrically around said cylindrical stator and said stator and said first cylindrical rotor each includes at least one winding forming at least one uninterrupted turn, said winding comprising at least one current-carrying conductor, a plurality of insulated conductive elements and at least one uninsulated conductive element and a magnetically permeable electric field confining insulation system, including an inner layer in intimate contact with the conductor, and an outer layer having semiconducting properties surrounding the insulating layer in intimate contact with the insulating layer, wherein each layer forms a substantially equipotential surface surrounding the conductor.
Dependencies are inferred from the claim text.