DE2240282C3 - Superconductor and process for its manufacture - Google Patents

Description

The invention relates to a superconductor according to the preamble of claim 1, in particular one Superconductor with high mechanical resistance that can withstand strong electromagnetic stress. Such a superconductor is known from DE-AS 12 74 703.

It is known to manufacture a superconductor from a plurality of superconducting wires, each of which surrounded by an insulating jacket and stranded in such a way that a stranded cable is formed; by extrusion this cable is then surrounded by a sheath made of an aluminum alloy, which gives it a gives good mechanical resistance.

However, the extrusion is difficult to carry out, especially when the stranded cable is made of wires consists of fine metal veins

The invention makes it possible to avoid these disadvantages.

The invention relates to a superconductor consisting of a large number of stranded superconductors Wires and an outer sheath made of a high mechanical resistance Material surrounding the strand, characterized in that the strand is made of a layer inside the sheath is surrounded by plastic.

With regard to features of preferred embodiments of the invention, reference is made to the subclaims referenced. This exemplary embodiment will now be explained in more detail with reference to the drawing.

F i g. 1 shows schematically a strand of superconducting Wires used to manufacture the conductor according to the invention

Fig.2 is a schematic cross section of the invention Head.

In Fig. 1 illustrates a strand 4 consisting of a

ίο number of stranded superconducting wires 1 exists Each wire 1 shown in FIG. 1 is shown in cross section consists of a plurality of superconducting wires 10, surrounded by a metal pipe 11 of high electrical conductivity at normal temperature; this tube can be made of aluminum, copper, gold, silver or the like. The wire is with everyone Temperature conductive.

The superconducting wires have, for example, a diameter between IC and 50 micrometers, and the The thickness of the tube 11 is between 50 and 100 micrometers.

Each wire 1 is surrounded by a sheath 12 made of an electrically insulating material such as synthetic resin.

The wires 1 are each stranded in threes to form strands 2; these strands 2 are also twisted in threes, which form the strands 3, which in turn form the actual stranded cable 4 by stranding three strands, the FIG. 2 shows in section.

The stranded cable 4 from the individual wires 1 is then surrounded by a layer 13 of plastic, at which it can be, for example, polyethylene, a polymerizable synthetic resin or the like.

This layer gives the stranded cable 4 strength and compactness. Otherwise it becomes a relative regular and constant position of the wires 1 is guaranteed and a constant diameter is achieved.

The stranded cable surrounding the layer becomes

surrounded by a jacket 14 made of an aluminum alloy and extruded is applied. The presence of the layer 13 also facilitates extrusion.

In addition to the superconducting wires, the stranded cable can have at least one high mechanical wire Have resistance wire, which gives the whole an additional mechanical strength.

The conductor according to the invention is suitable for the transmission of large alternating currents with very low currents Losses.

1 sheet of drawings

Claims (3)

Patent claims: 1. Superconductor consisting of a large number of stranded superconducting wires and one Outer sheath made of a material with high mechanical resistance that covers the stranded wire surrounds, characterized in that the braid (4) inside the sheath by a layer (13) is surrounded by plastic 2. Superconductor according to claim 1, characterized in that it is the plastic polymerizable synthetic resin or polyethylene. 3. A method for producing a superconductor according to claim 1, characterized in that according to Embedding the strand (4) in the layer (13) made of plastic and an outer sheath (14) by extrusion is applied to the layer.