Rotating electric machines with magnetic circuit for high voltage and method for manufacturing the same
OwnerMats Leijoninventor
Life of this patent
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Abstract
A rotating electric machine for direct connection to all types of high-voltage networks, in which the magnetic circuit adapted for high voltage comprises a rotor, stator and windings. The winding comprising a conductor surrounded by a solid insulation system. The invention also relates to a method for manufacturing the same.
Claims31
A rotating electric machine for high voltage comprising a stator, a rotor and windings, characterized in that at least one winding comprises one or more current-carrying conductor (2), wherein around each conductor there is arranged an inner layer with semiconducting properties and around the inner layer there is arranged a solid insulating part and around the insulating part there is arranged an outer layer with semiconducting properties.
A rotating electric machine according to any of the preceding claims, characterized in that the current-carrying conductor comprises a number of strands, said strands being insulated from each other, except a few strands that are uninsultated in order to secure electric contact with the inner semiconducting layer.
A rotating electric machine according to any of the preceding claims, characterized in that all the semiconducting layers disposed around the conductor are secured to the adjacent insulating part along essentially the whole of its contact surface.
A rotating electric machine with a magnetic circuit for high voltage comprising a magnetic core and a winding, characterized in that the winding comprises a cable comprising
- one or more current-carrying conductor (2),
- each conductor comprises a number of strands,
- around each strand there is arranged an inner semiconducting layer (3),
- around which is arranged an insulating layer (4) of solid, extruded insulation, around which is arranged an outer semiconducting layer (5).
A rotating electric machine for high voltage according to any one of the preceding claims, characterized in that the slots (10) are formed as a number of cylindrical openings (12), extending axially and radially outside one another, with a substantially circular cross section separated by a narrower waist portion (13) between the cylindrical openings.
A rotating electric machine for high voltage comprising a stator, a rotor and windings, characterized in that at least one winding comprises one or more coils and that the current-carrying conductors included in each coil are surrounded by insulation and that around the insulation which surrounds the conductor/conductors there is arranged an outer layer constituting an equipotential surface surrounding the conductor/conductors at both the coil side and the coil end.
A method for manufacturing a rotating electric machine comprising a magnetic core comprising slots, channels and the like, wherein these slots have at least one opening accessible from the outside of the magnetic core, and windings, characterized in that at least one winding is threaded into the opening such that the winding is formed while being mounted.
A method for manufacturing a magnetic circuit for a rotating electric machine, wherein the magnetic circuit is arranged in the stator and/or the rotor of the electric machine, which magnetic circuit comprises a magnetic core (8) with slots (10) for a winding (1) and wherein the slots are formed as cylindrical openings (12), extending axially and radially outside one another, with a substantially circular cross section, and that the method is characterized in that the winding comprises a cable which is threaded in the cylindrical openings.
Use of a rotating electric machine according to any of the preceding claims, characterized in that the machine can be operated with up to 100% overload for a period of time exceeding 15 minutes and up to about two hours.
Use of a rotating electric machine according to any of the preceding claims, characterized in that the rotating electric machine is directly connected to a power network via connecting devices and without an intermediate transformer between the machine and the network.
Dependencies are inferred from the claim text.