Electricite De France - Service National

Alsthom-atlantique

Gec Alsthom Sa

Alsthom

R. Graftaiux

Henri Nithart

Alain Fevrier

Jacques Maldy

Christian Bencharab

Michel Kiblaire

Patrick Bonnet

Robert Graftiaux

A superconducting conductor comprises a first fraction of prior-tinned strands (1, 3, 5, 7, 9, etc. . . . ) and an additional fraction of non-prior-tinned strands (2, 4, 6, 8, 10, etc., . . . ). The strands of the first fraction and of the additional fraction alternate regularly and are maintained in a coherent assembly after being assembled with transposition by heating to melt the layer of tin on the prior-tinned strands, with the tin from said layer then solidifying, thus providing substantially point adherence between the previously tinned strands while leaving channels (11, 12, etc. . . . ) inside the superconducitng conductor for cooling liquid circulation. The invention is also to a method of manufacturing such a superconducting conductor.

Superconducting conductor having multiple transposed strands with

A taping machine (10) for hot taping an electrical conductor (1), the machine comprising an outer ring (20) which is fixed so as not to rotate relative to the conductor and which receives the conductor to be insulated passing through the center thereof, and a rotating ring (30) rotating inside said fixed ring and carrying at least one reel (53) having pre-impregnated insulating tape (2) wound thereon, the taping machine and the conductor being caused to move relative to each other in translation while said rotating ring is simultaneously caused to rotate relative to the conductor to cause the, or each, tape to be helically wound around the conductor, said fixed ring including a peripheral channel (21) which is fed with hot air, and said rotating ring being provided with a rotating assembly (50) including a plate (51) for closing said peripheral channel, at least one spout rotating around said peripheral channel, and at least one associated heating nozzle (55) which is fed with hot air via said spout, with each tape running along a transfer passage of a corresponding heating nozzle. The invention is applicable to insulating and calibrating the dimensions of conductors for large electrical machines.

Taping machine for hot taping an electrical conductor

A flat multi-strand superconducting conductor with a separator. The conductor is constituted by transposed strands which form two layers (12, 14) on either side of an insulating separator (2, 3, 4) which is formed around a core (3, 4) including a continuous metal detector line so as to allow the transitions of the superconducting strands to be detected by measuring the voltage at the terminals of the conductor and compensating the induced voltage detected at the terminals of this detector line. Application to cryoalternators.

Flat multi-strand superconducting conductor with a separator

Growing community of inventors

Belfort, France

Henri Nithart