JPS5990905A - Insulated superconductive wire - Google Patents

Abstract

PURPOSE:To obtain a stable superconductive coil which is free from short- circuiting between the adjacent turns of the coil wire and is efficiently cooled by a refrigerant, by partially coating the surface of a superconductive wire with a thin insulator before an insulating tape is spirally wound on the wire at a spacing. CONSTITUTION:The surface of a superconductive wire 1 of circular cross-section is longitudinally coated with a thin insulator having a width substantially equal to a half of the circumference of the wire 1, e.g., a tape 2 with a thickness on the order of 0.15mm. which is formed by coating a polyimide film with a thermosetting resin. An insulating tape 3 larger in thickness than the tape 2 is spirally wound on the periphery of the wire 1 at a spacing. A coil made from such insulated superconductive wire will be free from short-circuiting between the adjacent turns of the wire 1 owing to the existence of the thin insulator 2 if the portions of the wire 1 which are not coated with the spiral insulating tape 3 should contact each other. Moreover, the surface of the wire 1 is partially exposed, and the exposed portion contacts, for example, liquid helium, thereby allowing efficient cooling.

Description

[Detailed description of the invention] The present invention relates to an insulated superconducting wire.

Superconducting wires are used by applying some kind of electrical insulation on the surface in order to prevent electrical 'AO' circuits during winding. 1, i.e. cooling by a refrigerant, e.g.
In order to ensure sufficient JI, it is necessary to insert a spacer between the windings F11 and 7 when winding the coil to create a flow path for liquid helium, or to limit the insulation of the superconducting wire to only a portion of the wire. J, C cold 7JI because the part without insulation comes into contact with liquid helium! ] - My husband is made (to be).

One method is to wrap an insulating tape 3, which also serves as a spacer, on the surface of the superconducting wire in a spiral shape at intervals of 110 times as shown in FIG. 1. However, this method - When oil is wound, the parts without the insulating tape 3 come into contact with each other, resulting in a short circuit between the lines.

The present invention has been made with the object of overcoming the above-mentioned drawbacks of the prior art and providing a novel insulated superconducting wire that is free from the risk of short circuits between wires.

According to the present invention, such a method involves peeling off the insulating tape in a spiral shape at intervals and then attaching the superelectric 39F before applying it.
11 on the surface of 11? Insulator C should be partially covered;
13 ＜Especially can be achieved in Nitto.

This is explained by referring to Figures 2 to 7 [Explanation 1] Figure 2 is...1
The surface of the superconducting wire 1 in the shape of a superconductor is
A thin insulating material with a width equivalent to 100 mm, such as a polyimide film coated with thermosetting t'l'l#I resin, has a thickness of 0.
．． It is vertically splinted with tape 2 of 15 mm culm thickness) and insulating tape 3 (thicker than tape 2) is placed around the circumference in a spiral shape with intervals of 4J'U and 111 threads.

Figure 3 shows two Arp 2 with a width of about one-third of the circumference.
This is a case where the surface of the superconducting wire 1 is coated at approximately symmetrical positions.

If such an insulated superconducting wire is wound into a coil, there is no risk of a short circuit between the wires due to the presence of the thin insulator 2 due to the portions without spiral insulation coming into contact with each other.

Moreover, a part of the surface of the superconducting wire is exposed, and since the surface is in contact with a refrigerant, for example 4.1 liquid helium, the cooling is carried out and stability ↑(1 can be ensured.

Figures 4 to 6 (, 1) When applied to a superconducting wire with a rectangular cross section, Figure 4 shows people Arp 2 in the intelligence part of 411.
Gall! l has been overturned.

It is applied to the surface of the long side of J and i, and covers a part of C, as in the case of Fig. 4.

3. Part of the long side of one of the long sides of Figure 1 and 1 is 12 and 12.

9' Go to Figure 14 - As with any of the examples in Figure 6, Figures 1, 2, and 3 show stable insulation with no short circuit between wires even when the coil is wound. A superconducting wire is obtained.

Above J: If this invention is j, there will be no short circuit between lines,
Toshisada is able to obtain a stable superconducting coil that is well cooled by a refrigerant.

In addition, although the case of unraveling insulator binding C organic film is shown, this is IJ Fukai 71 No., woven fabric or other fibrous material impregnated with insulating resin, and Yu, namel coating. C
It may also be an oxide of copper, aluminum, etc. that constitutes the surface of the superconducting wire.

[Brief explanation of the drawing]

Figure 111 shows an example of conventional superconducting wire! 1 and 2 to 6 are perspective views illustrating superconducting wires according to the present invention. 1: Superconducting wire, 22I conflict insulator, 3: Insulated Arp. To r'D ￥S 5 Same 2nd mouth 4th mouth et al.

Claims (1)

[Claims] An insulated superconducting wire whose surface is partially covered with a thin insulator and whose outer periphery is wound with insulating tape in a spiral shape (J) at intervals.