A kind of winding method of superconducting magnet

Abstract

The invention relates to a method for winding a superconducting magnet. Two or more single cakes are used to wind two single cakes into double cakes from one strip. One side of each is provided with a protruding ring, and the other side is provided with a recessed part; 2) Winding double cakes: first, fix the position of a single cake spool, wind the strip from the end point to the fixed spool, And weld the strip and the contact surface of the bobbin together; secondly, synchronously rotate the fixed bobbin and the tape reel, and wind the strip on the fixed bobbin; thirdly, after the total length of the strip is determined, the strip is cut off and fixed Another single-cake spool, weld the truncated part of the strip on the single-cake spool, rotate the two single-cake spools synchronously, and wind the strip from one spool to the other spool; finally, when the strip of the two pies When the material length and the number of turns are equal, stop the synchronous rotation, fix one of the spools, translate and rotate the fixed single cake, so that the two single cakes overlap to form a transition layer; 3) Magnet assembly: the protruding ring of the double cake spool is inserted into the phase The recess adjacent to the double pie spool. The invention can be widely applied to the winding of various superconducting magnets.

Description

technical field [0001] The invention relates to the electrical engineering field of a superconducting magnet, in particular to a winding method of a superconducting magnet. Background technique [0002] In the process of the development of superconducting magnet winding technology, because the traditional solenoid winding method cannot meet the requirements of superconducting magnet winding in many cases, a pie-shaped coil winding method has appeared, which is mainly suitable for winding tape shaped conductors or conductors with square cross-sections. The earliest pie-shaped coils were single-wire single-cake coils. However, the resistance of superconducting magnets mainly comes from the resistance of the connection between the strips. The superconducting magnet assembled with single-wire single-cake coils uses a large number of pies. There are also many welding points between them, which will increase the loss and heat generation of the magnet, which is unfavorable to the ...

AI Technical Summary

Problems solved by technology

However, this winding method has higher requirements on the winding device. When winding the strip from the tape reel to the bobbin of the double pie coil, it is often necessary to have at least one tape reel that needs to rotate and revolve around the coil bobbin at the same time. Therefore, the general single-wire double-cake coil winding machine has a cumbersome design and a large volume, and due to the complex movement of the tape reel, it is difficult to maintain the tension of the strip during the winding process, which increases the complexity and uncertainty of winding.

In recent years, with the wide application of superconducting magnets, the winding technology of single-wire double-cake coils for superconducting strips has also been developed and improved. A variety of single-wire double-cake winding machines have been invented, but the structures are complex and all The goal is to achieve the double cake in the above winding direction

Therefore, although the winding quality of the coil is improved, some inherent shortcomings of this winding method cannot be avoided.

First of all, the end of the wire is on the outside of the cake, and due to its lack of fixed support, it is difficult to weld

Secondly, since the contact between the welding point and the magnet is not easy to do well, it is difficult to cool and protect it with conventional contact refrigeration.

Third, the transition circle between the two cakes is the innermost, with the smallest bending radius, and requires a certain in-plane deformation, which may affect the flow capacity of the strip.

Therefore, the existing single-wire double-cake coil winding technology has no substantial progress in improving the coil quality

Images