CN213988466U - High-temperature superconducting magnet coil for toroidal field of fusion reactor - Google Patents
High-temperature superconducting magnet coil for toroidal field of fusion reactor Download PDFInfo
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- CN213988466U CN213988466U CN202021998717.7U CN202021998717U CN213988466U CN 213988466 U CN213988466 U CN 213988466U CN 202021998717 U CN202021998717 U CN 202021998717U CN 213988466 U CN213988466 U CN 213988466U
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- 230000004927 fusion Effects 0.000 title claims abstract description 23
- 239000004020 conductor Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 9
- 238000005253 cladding Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 230000017105 transposition Effects 0.000 abstract description 4
- 238000004804 winding Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000012771 pancakes Nutrition 0.000 description 2
- 229910001174 tin-lead alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of high-temperature superconduction, in particular to a fusion reactor toroidal field high-temperature superconducting magnet coil, which comprises a plurality of D-shaped magnets with the same structure, wherein the vertical parts of all the D-shaped magnets are positioned at the center of a fusion reactor toroidal field magnet system and are uniformly arranged in a circular shape, and the D-shaped magnets are arranged in a radial symmetrical manner; the conductor with the common vertical plane transposition characteristic is introduced, and the conductor torsion angles of different magnetic field regions in the magnet are independently designed, so that the magnet can fully utilize the high current carrying capacity of the second generation high-temperature superconducting strip under the parallel field, the material consumption of the high-temperature superconducting strip is greatly reduced, and the construction cost of the magnet is reduced.
Description
Technical Field
The utility model belongs to the technical field of high temperature superconduction, concretely relates to fusion reactor hoop field high temperature superconducting magnet coil.
Background
The high-temperature superconducting strip has an operating temperature and a critical magnetic field which are far higher than those of low-temperature superconductors, and provides a better choice for building a high-magnetic-field magnet, such as a fusion reactor magnet, an accelerator magnet, a detector magnet and the like. The critical current of the high-temperature super-strip material has obvious anisotropy, the critical current is maximum when the direction of the magnetic field is parallel to the strip surface, the critical current is minimum when the direction of the magnetic field is vertical to the strip surface, the difference between the critical current and the magnetic field is multiplied, and the difference is increased along with the increase of the magnetic field.
For a high-temperature superconducting magnet which does not operate in a stable state, the high-temperature superconducting cable needs to be twisted in a transposition mode so as to reduce alternating current loss of the cable, the high-temperature superconducting cable with a common structure fully rotates a strip when being twisted, the strip surface normal line of the strip changes along the length direction of the strip constantly, and generally, all the strip normal lines are difficult to be always perpendicular to the magnetic field direction, so that the current carrying capacity of all the strips is difficult to be fully utilized, and the economy is poor. Patent CN 110246625A, CN 110706860 a is a typical rutherford cable, where high temperature super-stacked rectangular, round strands are spatially transposed at an angle, the tape surface in the strand rotates 360 ° in one cycle, when this type of cable is used for winding magnets, all the tapes will have a portion where the tape surface normal is parallel to the magnetic field, resulting in that only the minimum critical current of the tape can be utilized. Therefore, the current carrying capacity of the high-temperature superconducting strip under the parallel field is fully utilized, the using amount of the second generation high-temperature superconducting strip is greatly saved, and the construction cost of the high-temperature superconducting magnet with the strong magnetic field is reduced.
Patent CN 105637592 a mentions that each strip face of the high temperature superconducting magnet winding is substantially parallel to the magnetic field, while the stacked strips also need to be twisted and stranded, but the patent does not give a specific, executable method. With the development of the critical current promotion and cutting technology of the high-temperature superconducting tape, the circular conductor with smaller diameter is manufactured by using the high-temperature superconducting narrow band, the bending property of the circular conductor is close to that of a copper wire with the same diameter, the cable with the characteristic of common vertical plane transposition can be wound by fully utilizing the advantage, so that the high-temperature superconducting strong magnetic field magnet winding is designed and manufactured, the current carrying capacity of the second generation high-temperature superconducting tape under the parallel field can be fully utilized, and the construction cost of the high-temperature superconducting magnet with the strong magnetic field can be greatly reduced.
Disclosure of Invention
The utility model aims at providing a fusion reactor hoop field high temperature superconducting magnet coil aims at remedying the shortcoming that the current high temperature superconducting strong magnetic field magnet winding's strip current-carrying capacity utilization ratio is low.
The technical scheme of the utility model as follows:
a fusion reactor toroidal field high-temperature superconducting magnet coil comprises a plurality of D-shaped magnets with the same structure, wherein the vertical parts of all the D-shaped magnets are positioned in the center of a fusion reactor toroidal field magnet system and are uniformly arranged in a circular shape, and the D-shaped magnets are arranged in a radial symmetrical manner;
the section of the D-shaped magnet is rectangular, and the D-shaped magnet consists of a framework with a D-shaped appearance and a plurality of conductors which are positioned in the framework and have the same bending direction with the framework;
the conductors are arranged in a matrix shape in the cross section direction in the framework;
a semicircular channel is processed in the framework along the D-shaped bending direction, and the radius of the semicircular channel is matched with the radius of the section circle of the conductor;
the inner wall of the semicircular channel is provided with a positioning groove; the surface of the conductor is provided with a positioning edge strip; the positioning groove is matched with the positioning edge strip, so that the conductor is placed in the semicircular groove channel.
The framework is divided into a plurality of parts along the D-shaped direction, and the parts comprise an embedded framework and a connecting framework; each part of embedded framework and the conductors embedded in the embedded framework form a double-pancake coil; the connection framework is arranged between the double-cake coils.
The connecting surface of the embedding framework and the connecting framework is processed with a semicircular groove along the D-shaped bending direction, the embedding framework is connected with the connecting framework, and the conductor is positioned at the part surrounded by the semicircular groove on the connecting surface of the two parts of frameworks.
The outer surface of the connecting skeleton at the edge is smooth, namely the surface of the D-shaped magnet.
The D-shaped magnet is divided into 3 parts, namely 3 double-pancake coils are arranged, the adjacent double-pancake coils are connected through a connecting framework, and two rows of conductors are embedded into each double-pancake coil.
The conductor comprises an inner cable frame, a strand wound outside the cable frame and a metal sheath surrounding the outside of the strand, and a positioning edge strip is processed on the outer wall of the metal sheath.
The strand comprises a cladding metal and an internal tape, and the tape is a stacked conductor made of a high-temperature superconducting material.
The high-temperature superconducting material is second-generation high-temperature superconducting REBCO.
The specification of the strip is 1-5mm in width and 0.05-0.2mm in thickness.
The cladding metal material of the strand is tin, lead, tin-lead alloy, gold, aluminum or copper.
The invention has the following remarkable effects:
compared with the prior art, the invention has the beneficial effects that:
1. when the high-intensity magnetic high-temperature superconducting magnet coil is designed, the conductor with the common vertical plane transposition characteristic is introduced, and the conductor torsion angles of different magnetic field regions in the magnet are independently designed, so that the magnet can fully utilize the high current carrying capacity of second-generation high-temperature superconducting strips in parallel fields, the material consumption of the high-temperature superconducting strips is greatly reduced, and the construction cost of the magnet is reduced.
2. The coil is assembled by adopting a plurality of double-cake coils in parallel, and a semicircular groove is formed in the double-cake framework, so that a conductor can be twisted necessarily when the coil is wound, and the conductor strip surface is kept parallel to a magnetic field in the area where the conductor strip surface is located or has a minimum included angle.
The positioning grooves are arranged in the semicircular grooves of the double-cake frameworks through magnetic field analysis, the positioning edge strips are arranged on the surfaces of the conductors through testing, and the strip planes in the conductors are fully arranged according to the expected direction through the positioning grooves and the positioning edge strips in the winding process, so that the superconducting strip planes in the conductors are kept parallel to or have the minimum included angle with the magnetic field of the area where the superconducting strip planes are located.
Drawings
FIG. 1 is a schematic diagram of a fusion reactor toroidal field magnet system magnet coil;
FIG. 2a is a schematic cross-sectional view of a D-shaped magnet;
FIG. 2b is a schematic view of the bobbin distribution and double pancake coils;
FIG. 2c is a schematic cross-sectional view of the bobbin arrangement and the double-pancake coil;
FIG. 3 is a schematic view of a conductor;
FIG. 4 is a schematic view of a strand;
in the figure: 1. a fusion reactor toroidal field magnet system; a D-shaped magnet; 3. a cross section; 4. double-pancake coils; 5. a framework; 5-1, a semicircular groove; 5-2, positioning a groove; 6. a conductor; 6-1, positioning edge strips; 7. a strand; 8. a strip of material; 9. a cable framework; 10. a metal sheath.
Detailed Description
The present invention will be further explained with reference to the drawings and the detailed description.
As shown in fig. 1, the magnet coil of the fusion reactor toroidal field magnet system 1 is composed of 16D-shaped magnets 2 of the same structure, which are symmetrically arranged.
The internal structure of the D-shaped magnet 2 is shown in fig. 2a, 2b and 2 c.
The section 3 of the D-shaped magnet 2 is rectangular, and the D-shaped magnet 2 consists of a framework 5 with the D-shaped appearance and a plurality of conductors 6 which are positioned inside the framework 5 and have the same bending direction with the framework 5.
The conductors 6 are arranged in a matrix in the direction of the cross section inside the skeleton 5. The portion between the conductors 6 is also the skeleton 5, i.e. the conductors 6 are embedded inside the skeleton 5.
In order to fix the conductor 6 in the former 5, the former 1 is divided into several parts along the direction of the D-shape, including an embedded former and a connecting former.
Each part of the embedded bobbin and the conductors 6 embedded therein together constitute a double pancake coil 4. The connection framework is arranged between the double-cake coils 4.
The connecting surface of the embedding framework and the connecting framework is provided with a semicircular groove 5-1 along the D-shaped bending direction, the radius of the semicircular groove 5-1 is matched with the radius of the section circle of the conductor 6, so that the two parts of frameworks are connected, and the conductor 6 can be positioned at the part surrounded by the semicircular groove 5-1 on the connecting surface of the two parts of frameworks.
The outer surface of the connecting skeleton at the edge is of course smooth, i.e. the surface of the D-shaped magnet 2.
In the embodiment, as shown in fig. 2a, the D-shaped magnet 2 is divided into 3 parts, that is, 3 double-pancake coils 4 are provided, and the adjacent double-pancake coils 4 are connected through a connecting framework. Each double-pancake coil 4 embeds two rows of conductors 6.
As shown in fig. 3, the conductor 6 is a high temperature superconducting cable, and includes an inner cable former 9, a strand 7 wound outside the cable former 9, and a metal sheath 10 surrounding the strand 7, and a positioning edge strip 6-1 is processed on the outer wall of the metal sheath 10.
As shown in fig. 4, the strands 7 comprise a clad metal and an inner tape 8, the number of layers of the tape 8 being 5-50.
The strip 8 is a stacked conductor made of high-temperature superconducting material, and the specification of the strip 8 is 1-5mm in width and 0.05-0.2mm in thickness. The strip 8 is selected as a second generation high temperature superconducting material (REBCO) with the specification of 1-5mm width and 0.05-0.2mm thickness.
The cladding metal material of the strand 4 is tin, lead, tin-lead alloy, gold, aluminum or copper.
And a positioning groove 5-2 is processed on the inner wall of the semicircular groove 5-1 and is used for matching with a positioning edge 6-1 on the surface of the conductor 6 when a coil is wound.
The semicircular groove 5-1 is used for positioning the conductor 6 and simultaneously realizing the torsion of the wound conductor 6, so that the belt surface direction of the high-temperature superconducting tape 8 in the semicircular groove is parallel to the magnetic field at the position or has the minimum included angle.
The inner wall of the semicircular groove 5-1 is provided with a positioning groove 5-2 which is used for matching with a positioning edge 6-1 on the surface of the conductor 6 when a coil is wound.
The positioning groove 5-2 and the positioning edge strip 6-1 are arranged to ensure that the belt surfaces of the high-temperature superconducting tapes 8 in the conductor 6 are arranged in the expected direction when the high-temperature superconducting coil is wound.
Claims (9)
1. A fusion reactor toroidal field high temperature superconducting magnet coil is characterized in that: the magnetic field fusion reactor comprises a plurality of D-shaped magnets (2) with the same structure, wherein the vertical parts of all the D-shaped magnets (2) are positioned at the center of a fusion reactor annular field magnet system and are uniformly arranged in a circular shape, and the D-shaped magnets (2) are arranged in a radial and symmetrical manner;
the section (3) of the D-shaped magnet (2) is rectangular, and the D-shaped magnet (2) consists of a framework (5) with a D-shaped appearance and a plurality of conductors (6) which are positioned in the framework (5) and have the same bending direction with the framework (5);
the conductors (6) are arranged in a matrix form in the cross section direction in the framework (5);
a semicircular channel (5-1) is processed in the framework (5) along the D-shaped bending direction, and the radius of the semicircular channel (5-1) is matched with the radius of the section circle of the high-temperature superconducting conductor (6);
a positioning groove (5-2) is processed on the inner wall of the semicircular channel (5-1); the surface of the conductor (6) is provided with a positioning edge strip (6-1); the positioning groove (5-2) is matched with the positioning edge strip (6-1) so that the conductor (6) is placed in the semicircular groove channel (5-1).
2. A fusion reactor toroidal field high temperature superconducting magnet coil as claimed in claim 1, wherein: the framework (5) is divided into a plurality of parts along the D-shaped direction, and the parts comprise an embedded framework and a connecting framework; each part of the embedded framework and the conductors (6) embedded in the embedded framework form a double-pancake coil (4); a connecting framework is arranged between the double-cake coils (4).
3. A fusion reactor toroidal field high temperature superconducting magnet coil as claimed in claim 2, wherein: the connecting surface of the embedded framework and the connecting framework is provided with a semicircular groove (5-1) along the D-shaped bending direction, the embedded framework is connected with the connecting framework, and the conductor (6) is positioned at the part surrounded by the semicircular groove (5-1) on the connecting surface of the two parts of frameworks.
4. A fusion reactor toroidal field high temperature superconducting magnet coil as claimed in claim 3, wherein: the outer surface of the connecting skeleton at the edge is smooth, namely the surface of the D-shaped magnet (2).
5. A fusion reactor toroidal field high temperature superconducting magnet coil as claimed in claim 3, wherein: the D-shaped magnet (2) is divided into 3 parts, namely 3 double-cake coils (4), the adjacent double-cake coils (4) are connected through a connecting framework, and two rows of conductors (6) are embedded into each double-cake coil (4).
6. A fusion reactor toroidal field high temperature superconducting magnet coil as claimed in claim 3, wherein: the conductor (6) comprises an internal cable frame (9), a strand (7) wound outside the cable frame (9) and a metal sheath (10) surrounding the outside of the strand (7), and positioning edge strips (6-1) are machined on the outer wall of the metal sheath (10).
7. The toroidal field high temperature superconducting magnet coil of a fusion reactor as claimed in claim 6, wherein: the folded yarn (7) comprises a cladding metal and an internal strip (8), wherein the strip (8) is a stacked conductor made of a high-temperature superconducting material.
8. A fusion reactor toroidal field high temperature superconducting magnet coil as claimed in claim 7, wherein: the high-temperature superconducting material is a second-generation high-temperature superconducting material REBCO.
9. A fusion reactor toroidal field high temperature superconducting magnet coil as claimed in claim 7, wherein: the specification of the strip (8) is 1-5mm in width and 0.05-0.2mm in thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021998717.7U CN213988466U (en) | 2020-09-14 | 2020-09-14 | High-temperature superconducting magnet coil for toroidal field of fusion reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021998717.7U CN213988466U (en) | 2020-09-14 | 2020-09-14 | High-temperature superconducting magnet coil for toroidal field of fusion reactor |
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| CN213988466U true CN213988466U (en) | 2021-08-17 |
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| CN202021998717.7U Withdrawn - After Issue CN213988466U (en) | 2020-09-14 | 2020-09-14 | High-temperature superconducting magnet coil for toroidal field of fusion reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038036A (en) * | 2020-09-14 | 2020-12-04 | 核工业西南物理研究院 | Fusion reactor toroidal field high-temperature superconducting magnet coil and winding method |
| CN114360841A (en) * | 2021-11-30 | 2022-04-15 | 核工业西南物理研究院 | Detachable large-current plate type annular field magnet coil |
-
2020
- 2020-09-14 CN CN202021998717.7U patent/CN213988466U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038036A (en) * | 2020-09-14 | 2020-12-04 | 核工业西南物理研究院 | Fusion reactor toroidal field high-temperature superconducting magnet coil and winding method |
| CN112038036B (en) * | 2020-09-14 | 2024-07-16 | 核工业西南物理研究院 | Fusion reactor circumferential field high-temperature superconducting magnet coil and winding method |
| CN114360841A (en) * | 2021-11-30 | 2022-04-15 | 核工业西南物理研究院 | Detachable large-current plate type annular field magnet coil |
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Granted publication date: 20210817 Effective date of abandoning: 20240716 |