EP1023738A2 - Procede de production d'une bobine en materiau supraconducteur haute temperature et bobine supraconductrice haute temperature a faible deperdition en courant alternatif - Google Patents

Procede de production d'une bobine en materiau supraconducteur haute temperature et bobine supraconductrice haute temperature a faible deperdition en courant alternatif

Info

Publication number
EP1023738A2
EP1023738A2 EP98949001A EP98949001A EP1023738A2 EP 1023738 A2 EP1023738 A2 EP 1023738A2 EP 98949001 A EP98949001 A EP 98949001A EP 98949001 A EP98949001 A EP 98949001A EP 1023738 A2 EP1023738 A2 EP 1023738A2
Authority
EP
European Patent Office
Prior art keywords
coil
superconducting
superconducting coil
coils
reinforcement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98949001A
Other languages
German (de)
English (en)
Other versions
EP1023738B1 (fr
Inventor
Jürgen EHRENBERG
Joachim Bock
Günter BROMMER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans Industrial Solutions GmbH
Original Assignee
Aventis Research and Technologies GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE1997144984 external-priority patent/DE19744984A1/de
Application filed by Aventis Research and Technologies GmbH and Co KG filed Critical Aventis Research and Technologies GmbH and Co KG
Publication of EP1023738A2 publication Critical patent/EP1023738A2/fr
Application granted granted Critical
Publication of EP1023738B1 publication Critical patent/EP1023738B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49014—Superconductor

Definitions

  • the invention relates to a method for producing a coil from a high-temperature superconductor material.
  • Superconducting coils are used for the assembly of transformers for high currents with a current strength of usually far more than 50 A, of magnets especially for research purposes, in high energy physics, in ore separators, in the manufacture of semiconductor materials and for medical purposes such as e.g. MRI scanners and resistive current limiters are required.
  • Coils that are constructed from wound superconducting wire usually have a coil length of 50 mm to 110 mm and a length of the superconducting wire from 40 mm to 80 m, for example a coil outer diameter of 49 mm and for example a coil inner diameter of 13 mm.
  • Low-temperature superconducting coils mostly contain niobium titanium, niobium tin or niobium aluminum. Today, such coils mostly serve as magnets at the temperature of the liquid helium of 4.2 K or of liquid nitrogen at 77 K.
  • These magnet systems can be used as high-temperature superconducting insert coils in superconducting magnets together with low-temperature superconducting coils in DC operation.
  • These magnet systems are preferably used to build up very homogeneous magnetic fields and are used in particular in MRI. They are also a prerequisite for building strong magnetic deflection fields in particle accelerators.
  • AC coils in transformers can also be used as AC coils in transformers to serve as secondary or primary coils in core or sheath transformers for AC voltage conversion.
  • Superconducting coils can also be used as resistive current limiters, especially with alternating current, in order to avoid the occurrence of high short-circuit currents, particularly in power plants, and to prevent destruction of system parts such as generators and transformers.
  • the extremely short response times are particularly advantageous here.
  • the fewest superconducting coils are used in practice today. They are wound from a high-temperature superconducting wire that was manufactured using the Oxide Powder-in-Tube (OPIT) process.
  • the metal sheathing usually consists of an alloy with an electrically conductive noble metal, which in use leads to the fact that a certain part of the transported current leads to the formation of shielding currents and thus leads to additional electrical losses, the alternating current losses.
  • AC power loss energy is converted into heat and must then by the Cooling can be removed.
  • the polarity of the alternating current also changes the magnetic self-fields constantly; the energy dissipated - called hysteretic losses - contributes significantly to the AC losses.
  • Thin wire filaments lead to lower AC losses than thick wall thicknesses. The AC losses are therefore essentially dependent on the frequency and the wall thickness or the diameter of the superconducting bodies or filaments.
  • Coils are usually produced with OPIT wire, which, due to the wire dimensions, can only carry relatively small currents of the order of up to 20 A, so that usually a large number of windings are required.
  • they can be manufactured with high-temperature superconducting wires that were manufactured using the OPIT process.
  • the OPIT process particularly fine-grained powders with the chemical composition of a superconductor are poured into a tube containing predominantly silver and reduced in cross-section, for example by rolling, compacted, textured, annealed and converted to the desired superconductor material or further crystallized.
  • These wires often have a diameter of 0.1 to 0.3 mm including their metal sheath. They are almost always covered with a silver-containing metal tube.
  • the process is comparatively complex and takes a very long time overall; the pure process time is usually more than 1 month today.
  • the coils made from this have the disadvantage that their production is very complex and - due to the quality of the superconductor powder used and the subsequent steps of the mechanical and thermal treatment - very large differences in performance occur up to the loss of superconducting properties at 77 K.
  • the superconductivity breaks down and the superconductor becomes the normal conductor. This is related to the increased heating of the conductor and possibly the melting of the superconducting material.
  • High-temperature superconductor materials based on YBCO would be particularly advantageous for use in coils because of their particularly favorable values of the critical current density and current carrying capacity; however, they have so far not been able to be drawn out to form wires.
  • US 4,970,483 describes a coil made of YBCO which i.a. was produced by isostatic pressing and sintering of a pipe section and subsequent sawing, no stabilization being used in the processing. Therefore, the handling and processing of such coils must be carried out with extreme caution and is subject to a high risk of irreparable damage being introduced.
  • the object was therefore to propose a method for producing superconducting coils with which it is possible to produce largely or completely crack-free superconducting coils from solid materials, and to further improve the coils with regard to their superconducting properties.
  • These coils should preferably have no metallic sheathing.
  • a shaped body made of a pre-fired, sintered or after-annealed superconducting material can be used.
  • the process steps of pre-baking such as calcining, Sintems and possibly the Afterglow, which are carried out in a single fire or in several, possibly repeated, sub-steps are carried out in order to obtain a high-quality superconductor material.
  • a high-quality superconducting material that has a high proportion of one or more superconducting phases can already be assumed at the beginning of the method according to the invention.
  • the superconducting material preferably contains at least one of the superconducting phases with a composition essentially based on (Bi.Pb) -Ea-Cu-O, (Y, SE) -Ea-Cu-O or (TI, Pb) - (Ea , Y) -Cu-0, where Ea stands for alkaline earth elements and in particular for Ba, Ca or / and Sr.
  • the phases that occur in particular have a composition of approximately (Bi, Pb) 2 (Sr, Ca) 2 C Ul O x , (Bi, Pb) 2 (Sr, Ca) 3 Cu 2 O x ., (Bi, Pb ) 2 (Sr, Ca) 4 Cu 3 O x ,, (Y, SE) 1 Ba 2 Cu 3 O y, (Ba Y.SE ⁇ ⁇ u ⁇ y., (TI, Pb) 2 (Ba Ca) 2 Cu 1 O z ,, (TI, Pb) 2 (Ca , Ba) 3 Cu 2 O 2 ,,
  • the superconducting material contains, in addition to the superconducting phase or phases, one or more compounds which only melt above 950 ° C and not below decompose at 950 ° C, especially on BaSO 4 , SrSO 4 and / or (Ba, Sr) SO 4 .
  • a superconductor material that textures as strongly as possible and is oriented as far as possible in such a way that the platelet planes which correspond to the plane of the best superconductivity are largely aligned in the direction of the course of the coil is particularly preferred. This is possible in particular if a molded body produced in the melt casting process, in particular a centrifugal casting process, is used. Shaped bodies which are produced by a process as described in DE-A-38 30 092, EP-A-0 451 532, EP-A-0 462 409 or / and EP-A-0 477 493 are particularly suitable; due to their quotation, these publications are considered to be fully included in the description.
  • the starting geometry of the superconducting molded body is a rod or a tube, a cuboid, a cuboid with strongly rounded edge areas or a similar geometry, especially with a substantially cylindrical outer geometry.
  • Solid bodies can be converted into corresponding hollow bodies by mechanical processing.
  • the molded body should possibly have a wall thickness that is as uniform as possible, in particular a cylindrical cavity concentric to the outer surface. In principle, however, other cross sections can also be used for the molded body and the cavity.
  • the cavity does not have to be concentric with the outer surface and does not have to have a uniform wall thickness.
  • the coil to be manufactured usually has a cylindrical or essentially cylindrical basic shape. This coil may have deviations in shape and angle, in particular with regard to the deviation from the roundness of a cylinder and the deviation from the right angle of the cylinder axis from the plane from which an angle of the coil path is determined.
  • the method according to the invention serves for the production of superconducting coils or spirals from hollow bodies, which can contain different superconducting materials and can have different geometries, but especially for the production of high-temperature superconducting coils (HTSL coils), e.g. based on bismuth strontium calcium copper oxide.
  • the coils can be made from tubes or similar hollow or solid bodies and preferably have contact surfaces at their ends, which are preferably formed from silver sheets. However, these contacts can also have burned-in metal contacts, sheet metal contacts based on metals other than silver or possibly no electrically conductive contact surfaces.
  • Superconducting bodies of the type and geometry described generally have a total electrical resistance of ⁇ 0.1 ohm, measured at room temperature, which should be checked by means of a 2-point measurement before starting the actual work. Since tubular bodies, which were made from oxide superconductor materials, have predominantly ceramic properties, they are in Usually susceptible to cracking and breakage, especially in the case of further mechanical processing. For this reason, it is necessary to stabilize the superconducting bodies or, in the case of further thermal treatment, superconducting bodies, preferably BSCCO tubes, at least on the outside, if necessary also on the inside, by appropriate measures.
  • an external stabilization is preferably applied to the surface of the superconductor tube before the introduction of incisions or averages to produce the coil turns.
  • This external stabilization can be achieved by wrapping the tubular body with suitable, self-adhesive tapes, with adhesive-soaked, organic or inorganic fabrics (e.g. cotton layers, glass fiber mats, hemp cord), with self-curing single or multi-component adhesive mixtures (e.g. styrene resins, epoxy resins), with composite materials based on organic - and / or inorganic adhesive and fabric components (e.g.
  • a holder can be fitted, which is mainly used to clamp the superconductor tube in appropriate tools or machine tools (e.g. Vice, lathe). It is preferably fitted into a cylindrical cavity.
  • the fitting of a bracket is particularly recommended for pipe diameters greater than approximately 30 to 120 mm outer diameter or for pipe wall thicknesses smaller than approximately 5 mm, but is dependent both on the raw breaking strength of the material, as well as the forces and geometry used. Since this holder has to absorb large forces, in particular shear forces caused by mechanical machining operations, it should expediently consist of a thick-walled metallic tube, a solid metal rod or a thick metallic threaded tube.
  • brackets should protrude at least 100 mm beyond the respective ends of the superconductor tube in order to be able to fulfill their function as a clamping aid.
  • connection of the superconducting tube with the holder located therein can be carried out, for example, as follows: a) by filling the space with self-curing single- and / or multi-component adhesive mixtures, with low-melting metals or / and metal alloys, with plastics, wax or / and - after Paint preparation or similar sealing - with inorganic binder systems, b) by wrapping the holder with self-adhesive tapes and / or composite systems made of organic or inorganic fabrics, preferably combined with self-curing organic or inorganic adhesives, until a precisely fitting cylinder has been created the superconducting pipe section can be glued on, c) by screwing on a cylinder section made of wood, metal, alloy or plastic with an internal bore, which can be pushed over the holder and is manufactured to fit the inside diameter of the superconducting pipe t, so that it can then be glued to it, d) by inserting a flexible cylinder section, for example made of soft foam plastic or polys
  • the intended thread course with a corresponding pitch can be recorded on the outer reinforcement or the outer surface of the molded body.
  • the superconducting material can either be cut immediately along the specified spiral course, e.g. by sawing, turning or milling or especially in the case of thin walls of the superconducting tube after removing the corresponding external reinforcement in the area of the spiral marking e.g. by dissolving the superconductor material in suitable acids or alkalis or - after filling the outer cuts and removing the inner core - by turning off the superconducting material until the filling compound applied from the outside becomes visible.
  • the superconducting material is susceptible to cracking and breakage, it is recommended that the incorporated cuts preferably decay immediately to stabilize the coil.
  • one of the following adhesive systems can be applied to the outer surfaces of the superconductor material. Both the filling of the incisions / averages, as well as the application on the outer surfaces is referred to below as external reinforcement.
  • the application on the inner surfaces of the cavity is called internal reinforcement.
  • These reinforcements are expediently carried out, for example, by using self-curing single- or multi-component adhesive systems, which can be mixed with fine ceramic powders such as aluminum nitride, silicon nitride, aluminum oxide and / or silicon dioxide.
  • organic adhesive systems such as glue can also be used mixed with wood flour or fine cotton or hemp cords, which are inserted or inserted into the cuts and then glued.
  • inorganic-based adhesive systems such as gypsum or cement mixtures can also be used, again provided that a lacquer impregnation or coating has been carried out beforehand, such as from plastic melts made of polyethylene PE or polyvinyl chloride PVC.
  • the holder located inside the tubular coil is removed and, if necessary, the internal reinforcement. If an indirect severing of the superconductor material by further internal twisting is provided, the filling of any cuts that are already free is not necessary. Otherwise, the cut gaps are preferably filled with appropriate materials, as has already been done with the outer cuts. If necessary, the outer reinforcement which projects beyond the outer diameter of the coil and / or the inner reinforcement which projects beyond the inner diameter of the coil is partially or completely processed. The (remaining) external and / or internal reinforcement can also be removed from the user if necessary.
  • the external reinforcement can connect the coil turns outside the incisions / averages between the coil turns or / and directly between the coil turns, and / or an internal reinforcement can mechanically reinforce.
  • the use of a reinforcement, in which the spaces between the adjacent coil turns are not filled, is favorable for better cooling. Conversely, it is favorable for the mechanical stability to have filled exactly these gaps between the adjacent coil courses, since coils in the alternating field generally vibrate and are therefore mechanically stressed. The filling of these gaps must, however, essentially be done with a non-conductive material in order not to increase eddy currents. However, the finished coil must be reinforced at least in the spaces, on the outside diameter or on the inside diameter.
  • the external stabilization can be removed from the surface of the superconducting coil or spiral - that is to say at the contact surfaces for the electrical connection - and the total electrical resistance value of the coil at room temperature can then be repeated using a 2- Point measurement can be determined in order to test them for impairment, in particular due to cracks and / or cracks. If necessary, it is recommended to reapply an external reinforcement afterwards, possibly on the metallized contact areas, for reasons of stability.
  • coils with correspondingly different diameters can be selected, the windings of which can be held at their ends at a sufficient distance - at least 0.1 mm, preferably at least 0.3 mm - from one another and can be connected without interrupting the superconducting material.
  • This can be done, for example, using a method as described in EP-A-0 442 289; due to its quotation, this publication is considered to be fully included in the description.
  • non-conductive or metallic reinforcements in particular in the area around the joints, can be advantageous in order to increase the mechanical stability.
  • mono-, bi- or multifilament coils can be produced by making incisions in a shaped body in such a way that the resulting shaped body has the geometry of a mono-, bi- or multifilament coil.
  • the incisions are advantageously made along the predetermined spiral course by means of mechanical separating processes such as sawing, milling, drilling, turning, etc. and then filled in with one of the adhesive combinations already described.
  • a coil end is preferably divided by sawing, milling, drilling, turning, etc. after the separation work described above has been carried out in such a way that - after the opposite coil end has been cut in at other points - opposing spiral paths are created.
  • incisions in a shaped body for bi- or multifilament coils is advantageous compared to the joining of monofilament or, for example, in a special case of two bifilar coils, that possible quality losses at the joint are avoided.
  • Rectangular cross sections of the bobbin courses do not interfere in principle. For mechanical reasons, however, it is advantageous if the edges of the coil turns are broken (chamfering or rounding). Because of the magnetic properties, round, preferably circular, or approximately octagonal cross-sections of the bobbin courses are preferred, but cause considerable additional effort in the production.
  • Bi- or multifilament coils mechanically machined out of a single molded body can be of advantage over assembled monofilar coils if, when joining, it is not possible to make the joint homogeneous and similar to the surrounding superconducting material. For example, non-high-temperature superconducting areas in the joint can be avoided.
  • Bifilar or multifilar coils which were produced by arranging the incisions in a shaped body or by joining coils of different sizes, have the advantage that the magnetic fields of the opposite coil sections can reduce or cancel each other; this can further reduce induction and AC loss.
  • bi- or multifilament coils in which at least one "monofilar” coil has a smaller inside and / or outside diameter than at least one other "monofilar” coil associated therewith and applies in particular to such bi- or multifilament coils in which at least one coil has an outer diameter that is smaller than the inner diameter of at least one other coil connected with it, as well as for bi- or multifilar coils in which the coil turns of several connected coils have the same or approximately the same inner or / and have an outside diameter and in which the coil turns of the various "monofilar” coils alternate regularly in the longitudinal direction of the coil. In the latter type, the same inside and outside diameters are preferred for manufacturing reasons.
  • a coil according to the invention can be used as a semifinished product for the production of high-temperature superconducting transformers, windings, magnets, current limits or current supplies.
  • Such coils can be used as transformer coils on the secondary side of a transformer or as current-limiting coils, also in e.g. bifilar version, can be used as resistive current limiters. They can also be used to reinforce the magnetic field of an external magnet, particularly in the center of the coil, as internal coils, while the outer sections of the coil can also be wound from wires, because the magnetic field generated by superconducting wire windings in the inner part of the coil leaves, may not be sufficiently strong.
  • Coils with cross sections other than 5 x 5 mm can also be used to measure the AC loss, since the cross sections can be converted accordingly.
  • a high-temperature superconducting BSCCO tube with an inner diameter of 103 mm, an outer diameter of 113 mm and a length of 100 mm was used to produce the HTSL coil.
  • Silver contacts with a height of 20 mm were located at the respective ends of the BSCCO tube.
  • the total electrical resistance of the tube determined by means of a 2-point measurement at room temperature, was 0.1 ohm. After this resistance measurement, the The outer surface of the BSCCO pipe is tightly wrapped with TESA 4651 insulating tape. Then the metal bracket was positioned and centered in the inner part of the tube. The entire tube interior was then foamed with a mixture of isocyanate and polyether polyol. After one hour, the resulting excess polyurethane rigid foam material was removed.
  • the saw cuts were also filled with a mixture of polystyrene investment and aluminum nitride powder 1: 1. After the inner saw cut filling had set, the insulating tape on the outside was removed and the total electrical resistance was measured again at room temperature. This had a final value of 1.6 ohms.
  • the critical current density of the coil was 476 A / cm 2 at 77 K.
  • a BSCCO tube with the specification as in Example 1 was again used to produce the HTSL coil.
  • the outer surface of the tube was now provided with a 5 mm thick jacket made of glass fiber fabric and epoxy resin.
  • the metal holder was attached, the interior of the pipe was foamed, the thread profile was recorded, the BSCCO material was sawn in and the saw cuts were filled with the styrene investment material.
  • Aluminum nitride powder mixture as described in Example 1. After the filling compound had hardened, the HTSL spiral test piece was clamped in a lathe and the epoxy glass fiber composite jacket and the protruding, hardened filling compound were removed. The metal holder and the hard foam core were then removed as described in Example 1. The measurement of the final resistance showed a value of 1.8 ohms.
  • a BSCCO tube was again used to produce the HTSL coil, as described in Example 1.
  • the interior of the pipe was coated with a layer of lacquer.
  • the metal bracket was positioned and centered.
  • the interior of the pipe was filled with a plaster of Paris.
  • the further processing was carried out as described in Example 1.
  • the hardened gypsum mass was removed from the interior of the spiral pipe using a small chisel.
  • the measured final resistance value of the coil was 1.6 ohms.
  • the critical current density of the coil was 778 548 A / cm 2 .
  • a BSCCO tube in accordance with the specification described under Example 1 was again used to produce the HTSL coil. Then the total resistance was measured and the tightly stretched insulating tape layer was applied to the outer surface of the BSCCO pipe. Then the positioning of the metal bracket was carried out, which was now additionally equipped with a thread and had a diameter of 30 mm. Now a cylindrical plastic flexible foam body was inserted in such a way that the cylinder provided with an inner opening was placed on the metal holder and lowered along it into the interior of the tube. The diameter of the inner opening of the plastic cylinder was equal to the outer diameter of the metal holder, whereas the outer diameter of the cylinder was 2 mm larger than the inner diameter of the BSCCO pipe.
  • the length of the flexible plastic foam body was 10 mm longer than the length of the superconducting tube.
  • the plastic flexible foam body was then pressed together by means of a nut which was passed through the thread of the metal holder, so that the BSCCO tube was stiffened from the inside by means of this process.
  • the processing according to Example 1 was continued. After the backfilling of the saw cuts had been completed, the flexible foam plastic body was removed from the interior of the coil so that the finishing work described in Example 1 could be carried out.
  • the final value of the total electrical resistance was 1.9 ohms.
  • a BSCCO tube was used again in accordance with the specification described in Example 1. The measurement of the total resistance and the processing were also carried out as listed under Example 1. However, the saw cuts in this example were backfilled with a mixture of styrene investment and aluminum oxide powder in a ratio of 1: 1. The final resistance of the HTSL coil was 1.8 ohms.
  • Example 5 but using an epoxy resin-aluminum nitride powder mixture in a ratio of 1: 1.
  • the final resistance value of the HTSL coil was 1.7 ohms.
  • Example 8 As described in Example 1, but without silver contact surfaces at the ends of the BSCCO tube. Final resistance value of the HTSL coil 1.9 ohms.
  • Example 8 As described in Example 1, but without silver contact surfaces at the ends of the BSCCO tube. Final resistance value of the HTSL coil 1.9 ohms.
  • Example 2 Corresponding to Example 1, but using a BSCCO tube with an inside diameter of 55 mm, an outside diameter of 70 mm and a length of 200 mm. The height of the silver contacts at the ends of the tube was 20 mm. The final resistance value after processing was 1.1 ohms.
  • the critical current density J c of the coils of the examples listed above was at least 100 A / cm 2 at 77 K, preferably at least 400 A / cm 2 and particularly preferably at least 500 A / cm 2 , at 64 K at least 400 A / cm 2 and at 4 K at least 2000 A / cm 2 or preferably at least 5000 A / cm 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

L'invention concerne un procédé permettant de produire une bobine supraconductrice, selon lequel un corps moulé réalisé dans un matériau supraconducteur ou qui le devient suite à un traitement thermique ultérieur, est recouvert d'éléments de renforcement et est muni d'autres éléments lui conférant sa forme géométrique voulue. L'invention concerne en outre une bobine supraconductrice réalisée selon l'invention, à faible déperdition en courant alternatif et à base de matériau supraconducteur, très texturée et orientée de manière que les plans des lamelles soient dirigés dans une large mesure dans le sens du cours de la bobine, ladite bobine étant ébauchée à partir d'une pièce supraconductrice massive.
EP98949001A 1997-10-13 1998-10-01 Procede de production d'une bobine en materiau supraconducteur haute temperature et bobine supraconductrice haute temperature a faible deperdition en courant alternatif Expired - Lifetime EP1023738B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE1997144984 DE19744984A1 (de) 1997-10-13 1997-10-13 Verfahren zur Herstellung einer Spule aus einem Hochtemperatursupraleitermaterial und hochtemperatursupraleitende Spule mit geringem Wechselstromverlust
DE19744984 1997-10-13
DE19841636 1998-09-11
DE19841636 1998-09-11
PCT/EP1998/006262 WO1999022386A2 (fr) 1997-10-13 1998-10-01 Procede de production d'une bobine en materiau supraconducteur haute temperature et bobine supraconductrice haute temperature a faible deperdition en courant alternatif

Publications (2)

Publication Number Publication Date
EP1023738A2 true EP1023738A2 (fr) 2000-08-02
EP1023738B1 EP1023738B1 (fr) 2007-03-21

Family

ID=26040760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98949001A Expired - Lifetime EP1023738B1 (fr) 1997-10-13 1998-10-01 Procede de production d'une bobine en materiau supraconducteur haute temperature et bobine supraconductrice haute temperature a faible deperdition en courant alternatif

Country Status (6)

Country Link
US (1) US6646528B2 (fr)
EP (1) EP1023738B1 (fr)
JP (1) JP4362009B2 (fr)
CA (1) CA2305500C (fr)
DE (1) DE59813951D1 (fr)
WO (1) WO1999022386A2 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125429B4 (de) * 2001-05-25 2004-06-17 Bruker Biospin Gmbh Supraleitfähige Höchstfeldmagnetspule mit HTS-Spulensektion und Herstellungsverfahren
GB0209892D0 (en) * 2002-04-30 2002-06-05 Oxford Instr Superconductivity Imaging assembly
EP1408519B1 (fr) * 2002-10-04 2007-12-05 Nexans Amenée de courant pour dispositifs supraconducteurs
EP1406272A1 (fr) * 2002-10-04 2004-04-07 Nexans Amenée de courant pour dispositifs supraconducteurs
DE102004043988B3 (de) * 2004-09-11 2006-05-11 Bruker Biospin Gmbh Supraleitfähige Magnetspulenanrordnung
EP1681731A1 (fr) * 2005-01-12 2006-07-19 Nexans Limiteur de courant supraconducteur compact dans une configuration d'enroulement à faible inductance
DE102008011317A1 (de) 2008-02-27 2009-09-03 Nexans Monofilare supraleitende Spule
US7919435B2 (en) 2008-09-30 2011-04-05 Ut-Battelle, Llc Superconductor films with improved flux pinning and reduced AC losses
US8221909B2 (en) * 2009-12-29 2012-07-17 Ut-Battelle, Llc Phase-separated, epitaxial composite cap layers for electronic device applications and method of making the same
US8486864B2 (en) * 2009-12-29 2013-07-16 Ut-Battelle, Llc Method for producing microstructured templates and their use in providing pinning enhancements in superconducting films deposited thereon
EP2586586A1 (fr) * 2011-10-24 2013-05-01 GE Energy Power Conversion Technology Ltd Éléments de support de bobines
DE102014206506A1 (de) * 2014-04-04 2015-10-08 Siemens Aktiengesellschaft Elektrische Spuleneinrichtung mit wenigstens zwei Teilspulen und Verfahren zur Herstellung
DE102018205588A1 (de) * 2018-04-12 2019-10-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines gewendelten Körpers
EP3961661B1 (fr) 2020-08-31 2022-09-28 Bruker Switzerland AG Renforcement d'une bobine magnétique supraconductrice
US12567539B2 (en) * 2021-05-07 2026-03-03 Applied Materials, Inc. Methods for forming a high current inductor and non-transitory computer readable medium
EP4300123B1 (fr) * 2022-06-29 2025-10-29 Siemens Healthcare Limited Scanner à résonance magnétique doté d'une bobine de gradient blindée passivement

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63250881A (ja) 1987-04-07 1988-10-18 Semiconductor Energy Lab Co Ltd 超電導体の作製方法
US5011823A (en) * 1987-06-12 1991-04-30 At&T Bell Laboratories Fabrication of oxide superconductors by melt growth method
FR2628256A1 (fr) 1988-03-07 1989-09-08 Comp Generale Electricite Conducteur assimilable a un bobinage, en materiau supraconducteur
DE3830092A1 (de) 1988-09-03 1990-03-15 Hoechst Ag Verfahren zur herstellung eines hochtemperatursupraleiters sowie daraus bestehende formkoerper
US5356868A (en) * 1989-07-03 1994-10-18 Gte Laboratories Incorporated Highly oriented superconductor oxide ceramic platelets and process for the production thereof
US5021398A (en) * 1989-10-26 1991-06-04 Amp Incorporated Method of forming patterned oxide superconducting films
US5221661A (en) * 1990-01-17 1993-06-22 Rockwell International Corporation Method of depositing a superconducting Bi2 Sr2 CaCu2 O8
US5112801A (en) * 1990-01-24 1992-05-12 The United States Of America As Represented By The United States Department Of Energy Mechanical alignment of particles for use in fabricating superconducting and permanent magnetic materials
US5057488A (en) * 1990-02-12 1991-10-15 General Electric Company Synthesis of Bi-Pb-Ca-Sr-Cu-O superconductive material
DE4019368A1 (de) * 1990-06-18 1991-12-19 Hoechst Ag Verfahren zur herstellung rohrfoermiger formteile aus hochtemperatur-supraleiter-material sowie eine anlage zu seiner durchfuehrung
US5453494A (en) * 1990-07-06 1995-09-26 Advanced Technology Materials, Inc. Metal complex source reagents for MOCVD
JPH0812820B2 (ja) * 1992-04-02 1996-02-07 新日本製鐵株式会社 超電導マグネット
US5531015A (en) * 1994-01-28 1996-07-02 American Superconductor Corporation Method of making superconducting wind-and-react coils

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9922386A2 *

Also Published As

Publication number Publication date
US20020173429A1 (en) 2002-11-21
WO1999022386A3 (fr) 1999-08-05
CA2305500C (fr) 2008-01-22
DE59813951D1 (de) 2007-05-03
JP4362009B2 (ja) 2009-11-11
US6646528B2 (en) 2003-11-11
CA2305500A1 (fr) 1999-05-06
WO1999022386A2 (fr) 1999-05-06
JP2001521295A (ja) 2001-11-06
EP1023738B1 (fr) 2007-03-21

Similar Documents

Publication Publication Date Title
EP1023738B1 (fr) Procede de production d'une bobine en materiau supraconducteur haute temperature et bobine supraconductrice haute temperature a faible deperdition en courant alternatif
DE3855717T2 (de) Supraleitender Draht und Verfahren zu seiner Herstellung
DE2654924C2 (de) Supraleitendes Verbundkabel und Verfahren zu dessen Herstellung
DE69032253T2 (de) Oxidischer Supraleiter
DE3887910T2 (de) Verfahren zur Herstellung eines Drahtes aus supraleitendem Oxid und damit hergestellter Draht.
DE3203222C2 (de) Knüppel zur Herstellung eines drahtförmigen Supraleiters
DE3851070T2 (de) Verfahren zur Herstellung eines Oxid-Verbindungssupraleiterfadens.
DE69422746T2 (de) Hochtemperatur-supraleitender Kabelleiter aus oxidischem Supraleiter
DE3851180T2 (de) Verfahren zur Herstellung oxidkeramischer supraleitender Fäden.
DE3853089T2 (de) Supraleitender Draht und Verfahren zu seiner Herstellung.
DE102008049672B4 (de) Supraleiterverbund mit einem Kern oder mit mehreren Filamenten, die jeweils eine MgB2-Phase aufweisen, sowie Vorprodukt und Verfahren zur Herstellung eines Supraleiterverbundes
DE1640527B1 (de) Supraleiterzusammenbau
DE3883558T2 (de) Elektrizität und Licht leitender zusammengesetzter Draht.
DE3045277C2 (de) Supraleiter
DE1284502B (de) Verfahren zur Herstellung eines supraleitenden Drahtes
DE1917084A1 (de) Elektrischer Leiter
DE1690534C3 (de) KupferumhuUter band- oder drahtfönniger Supraleiter
DE925486C (de) Magnetische Schalenkoerper, insbesondere zur Belastung von Fernmeldekreisen, und Verfahren zu ihrer Herstellung
DE68904784T2 (de) Leiter fuer eine spule aus supraleitendem material.
WO1998056048A1 (fr) Corps de moulage en materiau supraconducteur texture et procede permettant de le produire
DE60127339T2 (de) Multifilament-Oxidsupraleiterdraht und Herstellungsverfahren dafür sowie verdrillter Oxidsupraleiterdraht und Herstellungsverfahren dafür
DE19744984A1 (de) Verfahren zur Herstellung einer Spule aus einem Hochtemperatursupraleitermaterial und hochtemperatursupraleitende Spule mit geringem Wechselstromverlust
DE10249550A1 (de) Supraleitender Kabelleiter mit SEBCO-beschichteten Leiterelementen
DE69014437T3 (de) Verfahren zur herstellung eines supraleitfähigen drahts vom keramischen typ.
DE3245903C2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000515

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE ES FR GB IT LI LU NL

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NEXANS SUPERCONDUCTORS GMBH

17Q First examination report despatched

Effective date: 20040524

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB IT LI LU NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070321

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59813951

Country of ref document: DE

Date of ref document: 20070503

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070604

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070702

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: CRONIN INTELLECTUAL PROPERTY

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20071227

BERE Be: lapsed

Owner name: NEXANS SUPERCONDUCTORS G.M.B.H.

Effective date: 20071031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071001

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20111024

Year of fee payment: 14

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121031

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121031

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20141021

Year of fee payment: 17

Ref country code: FR

Payment date: 20141022

Year of fee payment: 17

Ref country code: DE

Payment date: 20141022

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20141030

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59813951

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20151001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151001

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151001

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151102