GB2611050A - Methods of manufacturing a moulded, multi-coil cylindrical superconducting magnet structure - Google Patents
Methods of manufacturing a moulded, multi-coil cylindrical superconducting magnet structure Download PDFInfo
- Publication number
- GB2611050A GB2611050A GB2113577.7A GB202113577A GB2611050A GB 2611050 A GB2611050 A GB 2611050A GB 202113577 A GB202113577 A GB 202113577A GB 2611050 A GB2611050 A GB 2611050A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wrapper
- magnet assembly
- moulding cavity
- cylindrical
- flexible wrapper
- Prior art date
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- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 53
- 239000011347 resin Substances 0.000 claims abstract description 53
- 238000000465 moulding Methods 0.000 claims abstract description 27
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract 7
- 239000000463 material Substances 0.000 claims description 16
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 9
- 238000005304 joining Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 238000005470 impregnation Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 5
- 238000005520 cutting process Methods 0.000 claims 2
- 238000013459 approach Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 238000002595 magnetic resonance imaging Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004590 silicone sealant Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/048—Superconductive coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
A method for the manufacture of a multi-coil cylindrical superconducting magnet structure comprises placing a magnet assembly 60 comprising superconducting coils (50, Figure 1) into a moulding cavity; introducing a thermosetting resin into the moulding cavity to impregnate the coils; causing or allowing the thermosetting resin to harden; and removing the resulting structure from the moulding cavity. The magnet assembly is placed into the moulding cavity by placing the assembly with its axis vertical onto a base plate 130, providing a flexible wrapper 132 around the circumferentially outer surface of the magnet assembly, and sealing the joints between the magnet assembly, base plate and flexible wrapper to form the moulding cavity. The method preferably comprises securing an axial split 133 in the flexible wrapper using a securing strip 134. The magnet assembly may comprise a cylindrical mandrel 10 or a cylindrical former. A protective strip (162, Figure 4) or a wicking layer may be provided between the flexible wrapper and the magnet assembly.
Description
METHODS OF MANUFACTURING A MOULDED, MULTI-COIL CYLINDRICAL SUPERCONDUCTING MAGNET STRUCTURE The present invention relates to methods of manufacturing multi-coil cylindrical superconducting magnets, and to cylindrical superconducting magnets as may be manufactured by such methods. Such magnets may be employed as main magnetic field generators in magnetic resonance imaging (MRI) systems.
Conventionally, cylindrical superconducting magnets have been manufactured with formers. Formerless magnets, composed of alternating annular coils and annular spacers, are known. The present invention aims to provide simple, reliable manufacturing methods for manufacturing cylindrical superconducting magnets, and to provide improved cylindrical superconducting magnets as maybe manufactured by such methods. While the present invention is particularly described with reference to the manufacture of formerless magnets, it may also be applied to the manufacture of magnets in which superconducting coils are wound onto a former.
Aluminium or composite material formers are commonly used on "wet" magnets -those cooled by direct contact with a liquid cryogen -and "dry" magnets -those not cooled by direct contact with a liquid cryogen. Superconducting wire is wound onto a former, and can be left un-impregnated or can be impregnated with epoxy resin, for example. Such magnet structures can also be wet-wound, that is to say, wound using wire which is already coated in epoxy resin, rather than being vacuum impregnated after winding. While such use of a former gives good precision in coil size, shape and position, the formers are expensive and necessarily occupy space on the radially-inner surface of the coils, increasing the required diameter of the coils and moving the coils away from the imaging volume. Bearing in mind the required geometry of the coil layout, an increase in diameter of the coils carries with it a need for increased axial spacing between the coils. These effects increase the wire cost and the overall length of the magnet.
Externally sleeved coils have been employed, in which solenoids have external machined sleeves to constrain them and to reduce hoop stress. However, this approach may be found unsuitable for clinical MRI magnets due to increased cost.
Certain former-less coils are known, and may for example be known as "serially bonded magnets" or "SBM". SBM magnets can be assembled, for example, using individual coils stacked with annular spacers.
The present invention seeks to provide methods of manufacturing formerless, multi-coil, cylindrical superconducting magnets which are simpler and more precise than known methods, and may be employed at reduced cost as compared to known methods. The present invention also provides formerless, multi-coil, cylindrical superconducting magnets as may be produced by such methods.
The present invention aims to provide a method for the 25 manufacture of a multi-coil cylindrical superconducting magnet structure. The present invention accordingly provides methods as defined in the appended claims.
The above, and further, objects, characteristics and advantages of the present invention will become more apparent from the following discussion of certain embodiments thereof, given by way of non-limiting examples, in conjunction with the accompanying drawings, wherein: Fig. 1 shows a stage in the manufacture of a magnet structure with alternating coils and spacers in which layers of cloth are applied to a mandrel prior to winding of a coil thereon, so as to increase the diameter of a respective coil; Fig. 2 illustrates a stage in a method according to the present invention; Fig. 3 illustrates a later stage in the method of Fig. 2; and Fig. 4 illustrates a stage in another alternative method of the invention.
Fig. 1 schematically represents a mandrel 10 carrying coils 50 of superconducting wire wound on its radially outer surface 12. Radially outer surface 12 is rotationally symmetrical about axis A-A.
Annular spacers 20 of composite material are illustrated, between the coils 50 of superconducting wire. Annular spacers 20 may be positioned prior to winding of the superconducting coils 20, and serve to define annular spaces for winding of the superconducting wire to define the coils SO.
As shown in Fig. 1, layers of cloth 122 may be applied to the mandrel 10 prior to winding of a coil SO, so as to increase the diameter of the coil. The layers of cloth may be coated in uncured resin prior to winding onto the mandrel 10, a so-called "pre-preg" cloth; or may be wound dry and impregnated with resin during the same step that the coils 50 are impregnated with resin. Similarly, the same effect may be achieved by winding a filament of glass fibre or similar, which may be coated with uncured resin prior to winding, or may be wound dry and impregnated with resin during the same step that the coils are impregnated with resin. Once the cloth or filament 122 is wound to the required thickness over the mandrel 10, to provide the required inner diameter of the coil 50, wire is wound over the cloth or filament to constitute a superconducting coil 50.
Figs. 2-3 show a type of cylindrical mould which may be used for moulding superconducting magnet structures according to the present invention. Fig. 2 shows an example in perspective view, while Fig. 3 shows a variant of this embodiment in axial cross-section.
Magnet structure 60, including mandrel 10, coils 50 and spacers 20, is shown in Figs. 2-3. A base plate 130 is provided, to form a lower surface of a moulding cavity containing the magnet structure 60. Around the cylindrical radially outer surface of the magnet structure 60, is placed a flexible wrapper 132.
This may be a re-useable, essentially cylindrical, wrapper formed of stainless steel or another suitable material. It may have essentially parallel sides, as illustrated, or may be rolled or otherwise formed to a shape conformal to the outer surface of the magnet structure 60. The flexible wrapper 132 has an axial split 133 and will typically have a wall thickness of no more than about lmm and will hold a cylindrical shape of diameter larger than that of the outer surface of the magnet structure 60. The flexible wrapper is placed around the magnet structure 60, and a securing strip 134 is used to secure both sides of the split 133 and to complete a cylindrical shape of the wrapper 132. Fixation of the securing strip 134 to the wrapper 132 may involve flexing the wrapper 132 to reduce its diameter, to closely approximate the diameter of the magnet structure 60. Such flexing may result in a tendency for edges of the axial split 133 to move apart from one another, and such tension may be employed in a structure to retain joining strip 134 in position. The tension will tend to expand the diameter of wrapper 132, and once the mould is filled with resin, pressure from the resin will also tend to expand the diameter of wrapper 132. An arrangement of interlocking flanges on edges of the split 133 and the joining strip 134 may be provided, and may hold edges and strip in position as required for the moulding operation.
As shown in Fig. 3, retaining bands 166 may be placed around the cylindrical outer surface of the wrapper 132, to retain it in position. Retaining bands 166 may be disposable stainless steel banding, or glassfibre banding, or any material with suitable strength. Joints between wrapper 132 and base plate 130; and between edges of the split 133 and the joining strip 134 may be sealed by a temporary sealing means such as silicone sealant 168.
With the magnet structure 60, base plate 130 and wrapper 132 in place and defining a mould, and once the sealant 168 is cured, resin may be introduced into the cavity between mandrel 10 and wrapper 132. As illustrated, a resin port 136 may be provided towards a lower extremity of joining strip 134. Resin may be introduced through the resin port 136 to fill the mould.
Alternatively, a resin port may be provided towards a lower extremity of wrapper 132, although such an arrangement may interfere with the symmetry of the wrapper 132.
Fig. 4 shows, in axial cross-section, another mould arrangement which may be used in methods of the present invention. The arrangement bears resemblance to the arrangement of Figs. 23. In this arrangement, base plate 150 carries a resin port 152. As shown at 154, the magnet structure 160 may be shaped to avoid blocking the resin port 152.
Rather than a flexible, re-useable tool such as wrapper 132 of Figs. 2-3, the method illustrated by Fig. 4 employs a single-use flexible wrapper 156. In a preferred embodiment, the wrapper 156 may be of heat-shrinking material formed into a 35 tube: example materials include PVC or other polyolefins.
Preparation of the magnet structure may proceed as follows: magnet structure 160 is first wrapped in a porous FIFE stripping layer 158, which will be used later on to separate the magnet structure 160 from waste parts. A felt wicking 5 layer 160 is then wrapped around the porous FIFE stripping layer 158. The wrapper 156 is then placed around the felt wicking layer 160. As mentioned, in some embodiments, the wrapper is of a heat-shrinking material. In such embodiments, heat-shrinking material is heated, for example with a hand-10 held heat gun, or in an oven, and shrinks until it fits snugly around the felt wicking layer 160. In other embodiments, a stretchy wrapping film is wrapped around the felt wicking layer 160 to form the wrapper 136. Preferably, prior to fitting the wrapper 156, a robust protective strip 162, for example of 0.5mm thick stainless steel, is placed axially, between the magnet structure 160 and the porous PTFE stripping layer 158. Such protective strip 162 will function as a protection for the magnet structure 160 once resin impregnation of the magnet structure is complete, and the resin cured, as a knife may be used against the protective strip 162, to cut through and remove waste layers without damaging the magnet structure 160.
The material used for wrapper 156 may seal sufficiently against the base plate 150 to prevent resin from escaping; or a layer of temporary sealant, such as silicone sealant, may be applied to a surface of the base plate 150 before the wrapper is applied, so as to form a resin-tight seal between the base plate 150 and the wrapper 156. Once the wrapper 156 is applied, and any sealant used is cured, uncured resin is introduced into the resin port 152. Resin flows upwards through felt wicking layer 160 and impregnates coils, spacer material and any open spaces. The mandrel 10 forms a radially inner cylindrical surface of the moulding cavity. The resin is introduced through resin port 152 and through felt wicking 35 layer 160 until it reaches a flood level 166, representing full impregnation of the magnet structure 60. The resin is then caused or allowed to cure. Once the resin has cured, the wrapper 156, felt 160 and porous FIFE stripping layer 158 may be cut and peeled away, for example by running a knife against protective strip 162, leaving a completed magnet structure 160. According to a feature of certain embodiments of the present invention, the coils 50 are impregnated and moulded in a single step, to their final shape.
While the present invention is particularly described with reference to the manufacture of formerless magnets, it may also be applied to the manufacture of magnets in which superconducting coils are wound onto a former. In such embodiments, the former will take the place of the described mandrel 10 as an inner cylindrical wall of the moulding cavity; but the former will not be removed from the coils after moulding.
In some conventional manufacturing methods, stripping of cured resin was required: mechanical removal of excess resin from certain locations before proceeding with a following step in the manufacturing method. By avoiding the need to perform such mechanical stripping steps, a faster and less labour-intensive manufacturing method is provided.
An effect of moulding the coil assembly to its final shape means that impregnating resins of relatively high glass transition temperature Tg may be used. The resin degrades in strength above its glass transition temperature. Below the glass transition temperature, the resin behaves elastically. An advantage in using an impregnating resin of relatively high Tg lies in increased mechanical robustness when magnets are shipped "warm" -that is to say, at ambient temperature rather than intentionally cooled. "Warm" shipping is used, for example, for "dry" magnets, or magnets with a very low cryogen inventory in operation. The moulding method of the present invention enables a substantial reduction in the use of resin and dramatically minimises the required clean-up. This is important in the case of resins of high Tg, which become brittle at temperatures conventionally used for resin cleanup. For example, in the case of a conventional resin, heating to temperatures above 40°C softens the resins so unwanted parts can be relatively easily removed from the coil. With high Tg resins, however, they would be brittle at such temperatures and would be difficult to remove. Attempting to remove parts of such resins in a conventional manner could cause damage to the coil.
The low Tg resins conventionally used limit the peak allowable temperatures during a quench. The required design limitations that this imposes adds to the wire cost, magnet mass and the cost of the quench propagation system. Such requirements are eased by the use of a high-Tg resin, as may be enabled by the present invention.
Manufacture of superconducting coil assemblies by the methods proposed in the present application may allow reductions in cost and time for manufacturing of resin-impregnated superconducting coil assemblies.
The present invention provides a moulding approach that uses a re-usable flexible outer mould wall or a single-use wrapper performing an equivalent function. Both of these approaches are close-fitting and minimise the amount of resin on the radially outer surface of the coils 50 and spacers 20. Little resin removal in terms of clean-up is required.
The present invention means that resin strip processes may be simplified or omitted. The shape of the moulding cavity closely approximates to the shape of the magnet structure, and so the moulding process of the present invention may be regarded as a "near net-shape" moulding process. The moulding process provided by the present invention enables manufacture of a superconducting magnet assembly which reduces material 5 cost and reduces the coil structure manufacturing time due to the elimination of the need for multiple resin stripping operations, which conventionally included re-heating of the coil structure prior to resin stripping. The near net-shape moulding process also allows the use of high Tg resin systems. 10 According to embodiments of the present invention, the superconducting coil magnet structure 60 may be moulded, which enables the use of dry reinforcement material in The volumes between coils, which become spacers 20. Such dry materials are much cheaper than the use of cured composites which is conventional.
In superconducting magnet assemblies according to the present invention, manufacture of the cold mass, that is, the equipment which is held at a cryogenic temperature below the relevant superconducting transition temperature, in use, can be optimised to reduce material cost, labour hours, manufacturing lead-time, logistics costs.
Claims (14)
- CLAIMS: 1. A method for the manufacture of a multi-coil cylindrical superconducting magnet structure, comprising the steps of: -placing a magnet assembly (60; 160), comprising superconducting coils (50) into a moulding cavity; - introducing a thermosetting resin into the moulding cavity to Impregnate the superconducting coils (50); - causing or allowing the thermosetting resin to harden; and 10 -removing the resulting structure from the moulding cavity, characterised in that the step of placing the magnet assembly into a moulding cavity comprises the steps of: - placing the magnet assembly with its axis vertical, onto a base plate (130; 150); -providing a flexible wrapper (132; 156) around the circumferentially outer surface of the magnet assembly; - sealing joints between the magnet assembly, the base plate and the flexible wrapper, to form the moulding cavity.
- 2. A method according to claim 1 wherein the flexible wrapper comprises a re-useable, essentially cylindrical, flexible wrapper (132, 134) having an axial split (133) and of diameter larger than the outer diameter of the magnet structure (60).
- 3. A method according to claim 2, wherein the flexible wrapper has sides formed to a shape conformal to the outer surface of the magnet structure.
- 4. A method according to claim 2, wherein the flexible wrapper 30 has essentially parallel sides.
- 5. A method according to any of claims 2-4, further comprising the step of securing both sides of the split (133) and thereby completing a cylindrical shape of the wrapper using a securing 35 strip (134).II
- 6. A method according to claim 5 wherein the step of securing both sides of the split comprises flexing the wrapper (132) to reduce its diameter, to closely approximate the diameter of the magnet structure (60).
- 7. A method according to claim 6, wherein an arrangement of interlocking flanges are provided on edges of the axial split (133) and the joining strip (134), and hold the edges of the 10 split and the joining strip in position.
- 8. A method according to claim 1 wherein the flexible wrapper is a disposable single-use flexible wrapper (156), and the step of removing the resulting structure from the moulding cavity comprises cutting away the disposable single-use wrapper.
- 9. A method according to claim 6, wherein the disposable single-use flexible wrapper comprises a heat-shrinking 20 material formed into a tube, and the method further comprises heating the heat-shrinking material.
- 10. A method according to claim 8, wherein the disposable single-use flexible wrapper comprises a stretchy wrapping film.
- 11. A method according to any preceding claim which further comprises providing a wicking Layer between the magnet assembly (160) and the wrapper (132, 134; 156).
- 12. A method according to claim 8 which further comprises placing a protective strip (162) between the magnet assembly (160) and the wrapper (156), for preventing damage to the magnet assembly (160) when cutting away the wrapper.
- 13. A method according to any preceding claim, wherein the magnet assembly (60; 160) comprises a cylindrical mandrel (10), onto which annular spacers of composite filler material are formed by winding strips of filler cloth (46) around the mandrel (10) into axial sections (18) and superconducting coils (50) are formed by winding superconducting wire onto the mandrel (10) in axial sections between the wound strips of filler cloth, prior to the impregnation by the thermosetting resin, whereby annular spacers are formed of a composite filler material comprising the filler cloth, impregnated with the thermosetting resin; and wherein the mandrel (10) forms a radially inner cylindrical surface of the moulding cavity.
- 14. A method according to any of claims 1-12, wherein the magnet assembly (60; 160) comprises a cylindrical former, onto which superconducting coils (50) are formed by winding superconducting wire, prior to the impregnation by the thermosetting resin; and wherein the former forms a radially inner surface of the moulding cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2113577.7A GB2611050B (en) | 2021-09-23 | 2021-09-23 | Methods of manufacturing a moulded, multi-coil cylindrical superconducting magnet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2113577.7A GB2611050B (en) | 2021-09-23 | 2021-09-23 | Methods of manufacturing a moulded, multi-coil cylindrical superconducting magnet structure |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB202113577D0 GB202113577D0 (en) | 2021-11-10 |
| GB2611050A true GB2611050A (en) | 2023-03-29 |
| GB2611050B GB2611050B (en) | 2024-07-10 |
Family
ID=78399715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2113577.7A Active GB2611050B (en) | 2021-09-23 | 2021-09-23 | Methods of manufacturing a moulded, multi-coil cylindrical superconducting magnet structure |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2611050B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3633140A (en) * | 1970-08-26 | 1972-01-04 | Chemetron Corp | Dry insulated transformer |
| US5167715A (en) * | 1991-03-04 | 1992-12-01 | General Electric Company | Apparatus and method for impregnating superconductor windings |
| WO2011102513A1 (en) * | 2010-02-22 | 2011-08-25 | ジャパンスーパーコンダクタテクノロジー株式会社 | Method for impregnating superconducting coil |
| GB2487925A (en) * | 2011-02-08 | 2012-08-15 | Siemens Plc | Strap-on winding pockets used in forming an electromagnet |
| US20130176090A1 (en) * | 2010-05-26 | 2013-07-11 | Simon James CALVERT | Solenoidal magnets composed of multiple axially aligned coils |
| GB2519811A (en) * | 2013-10-31 | 2015-05-06 | Siemens Plc | Superconducting magnet assembly |
-
2021
- 2021-09-23 GB GB2113577.7A patent/GB2611050B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3633140A (en) * | 1970-08-26 | 1972-01-04 | Chemetron Corp | Dry insulated transformer |
| US5167715A (en) * | 1991-03-04 | 1992-12-01 | General Electric Company | Apparatus and method for impregnating superconductor windings |
| WO2011102513A1 (en) * | 2010-02-22 | 2011-08-25 | ジャパンスーパーコンダクタテクノロジー株式会社 | Method for impregnating superconducting coil |
| US20130176090A1 (en) * | 2010-05-26 | 2013-07-11 | Simon James CALVERT | Solenoidal magnets composed of multiple axially aligned coils |
| GB2487925A (en) * | 2011-02-08 | 2012-08-15 | Siemens Plc | Strap-on winding pockets used in forming an electromagnet |
| GB2519811A (en) * | 2013-10-31 | 2015-05-06 | Siemens Plc | Superconducting magnet assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2611050B (en) | 2024-07-10 |
| GB202113577D0 (en) | 2021-11-10 |
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