DE1514707A1 - Superconducting coil - Google Patents

Description

SOCXEIE GEHESAtE DE CONS TRUGS IONS. ,.

Es ei mecantiques Ιοί 47U /

(.AISIHOM)

Frankfurt, 11th ".- Mivf" -1966 HE / P-FST / Bissingar / fi.

Superconducting coil

To achieve very high magnetic inductions it is known to use superconductors, ie a conductor material whose electrical resistance disappears at a certain very low temperature of the transition temperature. With the help of superconductors, large amounts of electrical energy can be stored without loss Superconducting coils have become known which consist of wound wires or tapes, but their production causes great difficulties since the conductor material generally used is very brittle. In addition, such coils have the disadvantage that the distribution of the currents depends on from the field is unsatisfactory .. 'Also' the coil is only very difficult - to-cool 'and in addition the fill factor is not iramer sufficient, (

The present invention relates to a superconducting coil, with the characteristic that foils made of superconducting material serve as windings in the direction of the winding axis have just happened to each other.

A few examples are now based on the figures Invention described in more detail. 1 shows a winding element from which the superconducting coil according to the invention is built up leaves.

BATH ORIGINAL. ? '· 909825/1268

No. Until 26/128

Pig. FIG. 2 shows an example of a superconducting coil which, according to the invention, is composed of several foils according to FIG. 1 is*

3 shows a section from a further embodiment of the coil according to the invention.

4 shows graphically the course of the critical current as a function of the critical magnetic field in a superconductor. According to Fig. 1, a turn consists of a disk 1, which is punched or recessed from a foil made of superconducting material. The disc 1 has in its center

% ^r

^{w area} the breakthrough 2, which determines the section in which a very high induction is to be achieved. Furthermore, the disk 1 has a radially extending slot and, with the exception of the segment-shaped section 5, is coated with an insulating or non-superconducting material.

The superconducting coil shown in Figo 2 is constructed by Aufein- _s andersohichten more of the winding elements shown in FIG. 1. The slots of two adjacent winding elements are so offset from one another, that each of the slot of a Windungselementes in the middle of the segment-shaped non-insulated portion 5 of the adjacent interturn \ elements comes to lie. The segment-shaped section 5 allows the current to pass from one turn to the next. Assuming that the current enters the coil through the lowest turn, it describes a spiral ', "'" as it passes through the successive turns, taking the path indicated by the arrows.

Fig. 3 shows several for the sake of clarity in an exploded view Form shown foils; which, after being pressed together according to a further invention a section

BAD ORIGINAL 909825/126 8; ·

■ V ^':. 3 Λ ■■■■■ ■, ■■■ ■ .; ^: ■■■. ■■ Req. No. Until 26/128 '~ jf' _- ~

form a superconducting coil. Me slides correspond in their shape exactly the disks 1 in FIG. 1. In this embodiment, however, a height disk 7 is complete on one side, the other 6, on the other hand, is not isolated. The non-insulated Söheiben 6 are stacked so that they form a spiral. The panes insulated on one side 7 form a second spiral sandwiched with the one previously described. The slots in discs 6 and 7 are offset from one another by 180 °.

To cool the foils and to transfer them into the supra * conductive state can be the described coil in a container in which the lowest temperatures can be generated ο

There are also other possibilities for this to happen the disk-shaped films described are conceivable, as well as also other forms of ffieklüng's elements than those with the radial Slotted disks are accessible ",

For the insulation of the superconducting materials used to build the inventive superconductor Coil-serving foils can preferably be conductive Material such as copper or aluminum is used will. This measure turns out to be particularly good effective * if the coil partially ito superconductivity loses, because through the copper fcssw * aluminum belae the Dissipated heat much more quickly; can »In a? superconducting coil distributed according to the invention see de *

the la fig 4 ^ raphiisöh depicted

feö kritiiehött Stromfö from the critical magnetic field * il flows for example aweiaö ift center of the Spale, where an amfeld H ₁ kerreeh%, «la Btroa Z _z and is üet Btioa Ig

Until 26/1 se. ' '- # -

greater than OCE to the magnetisichen PEiD H ₁ associated critical current I ,, so check -vergrößert the conductor resistance is in the current path of the current I _"o In.diesem case follows Stcom I ₂ a path with the resistor NuI1 _s wherein it, as much rom center away until it has reached a section where the prevailing magnetic field EL corresponds to a critical current of the size I «. _{The current is automatically set to 0} according to the dependence of the critical current on the critical magnetic field

A superconducting coil according to the invention has a good fill factor. Such coils can be made of foils made of a Fiob tin alloy (Nb, Sn). This material is very brittle and difficult to process, but it has very good superconducting properties _o -

3 claims

2 sheets of drawings with

4 figures

BATH ORIGINAL

909825/1268

Claims (9)

SOCIETE GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES (ALBTHOM) Erfο-Νγο Until 26/128 Frankfurt, March 11, 1966 HE / P ~ FST / Bissinger / fi Pat e η t a η s ρ r ü ο h e M J Superconducting coil, characterized in that foils made of superconducting material are used as inventions »which are evenly viewed one on top of the other in the λ direction of the weighing axis» 2 "Superconducting coil according to claim 1, characterized in that several identical ring-shaped foils made of superconducting material, provided at one point on their circumference with a radial slot, one surface of which with the exception of a section adjoining the radial slot with an insulating or non-superconducting Coating is provided, are layered on top of one another, the slot of one film coming to lie on the non-insulated portion of the adjacent film. (Figures 1 and 2). λ ο Superconducting coil according to claim 1, characterized in that several ring-shaped foils made of superconducting material provided with a radial slot with the same number of foils of the same type, but completely provided with an insulating or non-superconducting coating on one side, are layered helically inside one another, the slots of the non-insulated foils to which the insulated foils are offset by about 180 ° (Fig. 5). 9 09ö2 ^ / faee;