CN115762954A

CN115762954A - Magnetic control single crystal pulling superconducting magnet coil

Info

Publication number: CN115762954A
Application number: CN202211699800.8A
Authority: CN
Inventors: 高树良; 周敏; 沈安; 袁小元
Original assignee: Linton Kayex Technology Co Ltd
Current assignee: Linton Kayex Technology Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-03-07

Abstract

The invention relates to a magnetic control single crystal pulling superconducting magnet coil which structurally comprises a first coil group and a second coil group, wherein the first coil group and the second coil group are oppositely arranged and are both arc-shaped ring structures with the same structure, and the first coil group and the second coil group are respectively composed of six annular sub-coils. The invention has the advantages that: by adopting a six-coil structure, the winding difficulty of a single coil is effectively reduced, and the production efficiency is improved. Meanwhile, the stress of the six-coil structure is more reasonable, and the risk of quench of the coil in the operation process can be relieved. The method can improve the batch production efficiency of the magnetic control single crystal pulling magnet and reduce the production and maintenance cost.

Description

Magnetic control single crystal pulling superconducting magnet coil

Technical Field

The invention relates to a magnetic control single crystal pulling superconducting magnet coil, and belongs to the technical field of semiconductor production equipment.

Background

The high-purity monocrystalline silicon is widely applied to industries such as solar cells, integrated circuits, semiconductors and the like, and is one of key materials of high and new technology industries such as photovoltaic power generation, electronic information and the like.

In the prior art, a common magnet coil of the superconducting magnet for magnetically controlled single crystal pulling is 4 coils or more, the structure is complex, the utilization rate of a magnetic field is not high, and particularly, the utilization rate of the magnetic field is low due to the fact that magnetic fields between the coils of the 4 coils and the structures above are mutually offset, so that the consumption of the superconducting wire is large and the cost is high under the same magnetic field requirement.

CN210535437U a conduction cooling magnetic control single crystal pulling superconducting magnet device adopts a saddle-shaped coil, which can avoid the above problems and improve the utilization rate of the magnet. However, the magnet diameter of the magnetic control single crystal pulling is about 2m, and the coil is a saddle-shaped curved coil, so that the winding is difficult, the time consumption is high, and the production efficiency is low.

CN113889314A single crystal pulling superconducting magnet coil and superconducting magnet apparatus, two coil groups of sub-coil groups are arranged side by side to reduce the difficulty of winding, but there are still problems of unreasonable stress and insufficient improvement of production efficiency.

Disclosure of Invention

The invention provides a magnetic control single crystal pulling superconducting magnet coil, which aims to overcome the defects in the prior art, further reduce the winding difficulty and rationalize stress and improve the production efficiency.

The technical scheme of the invention is as follows: the utility model provides a single crystal superconducting magnet coil is drawn to magnetic control, its structure includes first coil group and second coil group, and first coil group and second coil group set up relatively and be the arc ring structure that the structure is the same, and first coil group and second coil group all comprise six annular sub-coils respectively.

Preferably, the current directions of two adjacent sub-coils in the first coil group and the second coil group are opposite.

Preferably, the six sub-coils in the first coil group and the second coil group have the same shape and size.

Preferably, the six sub-coils are arranged in an array in two rows and three columns.

Or, preferably, the six sub-coils are sequentially arranged in an array of three rows and two columns.

The invention has the advantages that: by adopting the six-coil structure, the winding difficulty of a single coil is effectively reduced, and the production efficiency is improved. Meanwhile, the stress of the six-coil structure is more reasonable, and the risk of quenching of the coil in the operation process can be relieved. The method can improve the batch production efficiency of the magnetic control single crystal pulling magnet and reduce the production and maintenance cost.

Drawings

Fig. 1 is a schematic structural diagram of a magnetron-pulled single crystal superconducting magnet coil according to the present invention.

In the figure, 1 is a first coil group, 2 is a second coil group, 3 is a first partial coil, 4 is a second partial coil, 5 is a third partial coil, 6 is a fourth partial coil, 7 is a fifth partial coil, and 8 is a sixth partial coil.

Detailed Description

The present invention will be described in further detail with reference to examples and specific embodiments.

As shown in fig. 1, a magnetic control single crystal pulling superconducting magnet coil includes a first coil group 1 and a second coil group 2, the first coil group 1 and the second coil group 2 are oppositely arranged and are both arc-shaped ring structures with the same structure, and the first coil group 1 and the second coil group 2 are respectively composed of six annular sub-coils distributed in an array.

First coil assembly 1 and second coil assembly 2 divide into six sub-coils with prior art saddle coil structure respectively, have kept saddle coil magnetic control and have drawn single crystal magnet magnetic field high-usage, the same magnetic field intensity B with the line less, the magnetic leakage field is low grade advantage, and the whole arc that is of coil assembly, shared space size is littleer than traditional solenoid coil, finally makes the shared spatial position of magnet littleer, and the magnet is finally more compact. And under the condition of generating the same central magnetic field B intensity, the magnetic leakage of the magnet with the six-coil structure is smaller, the influence on surrounding electromagnetic equipment and people is smaller, and the iron yoke material required for magnetic leakage protection by adopting magnetic shielding is greatly reduced.

In addition, the six-coil structure structurally divides the upper long arc side, the lower long arc side, the left long arc side and the right long arc side, and the coil is more reasonable in stress. When the coil is electrified and excited, the problem of quench of the superconducting coil caused by large stress and strain of the superconducting coil due to strong electromagnetic force is relieved, so that the magnetic control single crystal pulling magnet manufactured by six coils can run more stably and reliably. The six-coil structure facilitates quench protection, reduces the risk of coil burnout caused by accidental quench of the magnet, and is more convenient to replace the coil and lower in maintenance cost as the coil burnout condition exists.

The six-coil structure converts the space curved surface structure of the saddle-shaped coil into a six-coil plane structure, greatly reduces the winding difficulty of the saddle-shaped coil, has low production cost and is convenient for large-scale batch production.

The current directions between two adjacent sub-coils in the coil group are opposite.

After the coil groups consisting of the six sub-coils are connected in series, when current is introduced, the magnetic fields are mutually offset due to the fact that the operating currents of the sub-coils adjacent in the vertical direction and the transverse direction are opposite, and finally the coil groups form the consistent operating current similar to that of the saddle-shaped coil, so that the electromagnetic fields finally generated by the six-coil structure are consistent to that of the saddle-shaped coil.

The six sub-coils in the coil group are identical in shape and size.

Specifically, the six sub-coils are arranged in a two-row three-column array in sequence.

The six sub-coils can also be arranged in an array in three rows and two columns.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a single crystal superconducting magnet coil is drawn in magnetic control, its characterized in that includes first coil group (1) and second coil group (2), and first coil group (1) and second coil group (2) set up relatively and be the arc ring structure that the structure is the same, and first coil group (1) and second coil group (2) all comprise six annular sub-coils respectively.

2. A magnetron pulled single crystal superconducting magnet coil as claimed in claim 1 wherein the current direction between two adjacent sub-coils in the first coil group (1) and the second coil group (2) is opposite.

3. A magnetron pulled single crystal superconducting magnet coil according to claim 1, characterized in that the six sub-coils in the first coil group (1) and the second coil group (2) have the same shape and size.

4. A magnetron single crystal pulling superconducting magnet coil as claimed in claim 1 wherein the six sub-coils are arranged in a two row three column array.

5. A magnetron pulled single crystal superconducting magnet coil as claimed in claim 1 wherein said six sub-coils are arranged in an array of three rows and two columns in sequence.