EP0786141B1 - Bobine magnetique supraconductrice a profil variable - Google Patents

Bobine magnetique supraconductrice a profil variable Download PDF

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Publication number
EP0786141B1
EP0786141B1 EP95939529A EP95939529A EP0786141B1 EP 0786141 B1 EP0786141 B1 EP 0786141B1 EP 95939529 A EP95939529 A EP 95939529A EP 95939529 A EP95939529 A EP 95939529A EP 0786141 B1 EP0786141 B1 EP 0786141B1
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European Patent Office
Prior art keywords
pancake
longitudinal axis
individual
superconducting magnetic
magnetic coil
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EP95939529A
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German (de)
English (en)
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EP0786141B2 (fr
EP0786141A4 (fr
EP0786141A1 (fr
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Anthony J. Rodenbush
Alexis P. Malozemoff
Bruce B. Gamble
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American Superconductor Corp
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American Superconductor Corp
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Priority claimed from US08/323,494 external-priority patent/US5604473A/en
Priority claimed from US08/541,639 external-priority patent/US5581220A/en
Application filed by American Superconductor Corp filed Critical American Superconductor Corp
Priority to DE69531693.1T priority Critical patent/DE69531693T3/de
Publication of EP0786141A1 publication Critical patent/EP0786141A1/fr
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    • 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

Definitions

  • the invention relates to superconducting magnetic coils.
  • a superconductor can carry a electrical current density up to a critical current density (J c ) of the superconductor.
  • the critical current density is the current density at which the material loses its superconducting properties and reverts back to its normally conducting state.
  • Superconductors may be used to fabricate superconducting magnetic coils such as solenoids, racetrack magnets, multipole magnets, etc., in which the superconductor is wound into the shape of a coil.
  • the temperature of the coil is sufficiently low that the HTS conductor can exist in a superconducting state, the current carrying capacity as well as the magnitude of the magnetic field generated by the coil is significantly increased.
  • Typical superconducting materials include niobium-titanium, niobium-tin, and also copper oxide ceramics such as members of the rare-earth-copper-oxide family (i.e., YBCO), the thallium-barium-calcium-copper-oxide family (i.e., TBCCO), the mercury-barium-calcium-copper-oxide family (i.e., HgBCCO), and the bismuth-strontium-calcium-copper oxide family (i.e., BSCCO).
  • YBCO rare-earth-copper-oxide family
  • TBCCO thallium-barium-calcium-copper-oxide family
  • HgBCCO mercury-barium-calcium-copper-oxide family
  • BSCCO bismuth-strontium-calcium-copper oxide family
  • lead i.e., (Bi,Pb) 2 Sr 2 Ca 2 Cu 3 O x or Bi 2 Sr 2 Ca 2 Cu 3 O x (BSCCO 2223)
  • YBCO 123 Y 1 Ba 2 Cu 3 O 4
  • the superconductor in fabricating such superconducting magnetic coils, may be formed in the shape of a thin tape 5 which allows the conductor to be bent around the diameter of a core.
  • the thin tape is fabricated as a multi-filament composite superconductor including individual superconducting filaments 7 which extend substantially the length of the multi-filament composite conductor and are surrounded or supported by a matrix-forming material 8, which is typically silver or another noble metal. Although the matrix forming material conducts electricity, it is not superconducting. Together, the superconducting filaments and the matrix-forming material form the multi-filament composite conductor.
  • the superconducting filaments and the matrix-forming material are encased in an insulating layer (not shown).
  • the ratio of superconducting material to matrix-forming material is known as the "fill factor" and is generally less than 50%.
  • the tape may also be in other well-known forms including "powder-in-tube” (PIT) forms or coated tapes in which the superconductor is deposited on the surface of a tape-shaped substrate.
  • a magnetic coil can be wound with superconducting tape using generally one of two approaches.
  • the first approach known as layer winding
  • the superconductor is wound about a core with turns being wound one next to another until a first layer is formed. Subsequent layers are then wound on top of previous layers until the desired number of layers are wound on the core.
  • the superconductor tape is wound one turn on top of a preceding turn thereby forming a plane of turns perpendicular to the axis of the coil.
  • the pancake coils can be wound as double pancakes.
  • a superconducting magnetic coil assembly using pancake coils may include several coils, coaxially disposed along the length of the coil assembly.
  • the individual coils are interconnected using short lengths of superconducting wire or ribbon made from the superconducting materials of the type described above, for example, copper oxide ceramic.
  • US-A-4499443 discloses high-field double pancake superconducting coils made from low temperature superconductor material, such as NB 3 Sn, there being description as to how the magnets are cooled to 4.2K with supercritical helium.
  • JP-A-61-0842404 discloses a superconducting magnet of double pancake coils having a uniform magnetic field at the centre of a magnetic coil.
  • a superconducting magnetic coil assembly comprising: at least a plurality of double pancake coils, coaxially disposed along a longitudinal axis of the coil assembly, each double pancake having a pair of individual pancake coils, each individual pancake coil including an anisotropic high temperature superconductor wound about a longitudinal axis of the coil assembly and defining a bore of the superconducting magnetic coil assembly, each double pancake coil electrically connected to an adjacent pancake coil, the coil assembly of electrically connected pancake coils having a varying radial cross section with respect to the longitudinal axis, wherein the bore is centered about the longitudinal axis.
  • the interfaces between the individual pancakes of the double pancakes preferably lie generally along the inner diameter of the coil assembly and are formed of the same continuous length of superconducting wire by virtue of special winding and construction techniques.
  • the electrical interconnections between double pancake coils, called “bridges" may be accomplished using relatively straight or “unbent” segments of a conducting tape-shaped material between the individual pancakes, of adjacent double pancake pairs, of substantially equal outer dimension.
  • the conducting material bridging the pancakes can be either a solid piece of totally superconducting material or, preferably, is a piece of composite superconducting wire contacting the pancakes through its metallic sheath or an etched piece of superconducting wire which contacts an etched outer layer of the pancake to form a fully superconducting joint.
  • the segments of superconducting wire may have a slight bend for following the outer contour of the pancake coil in the direction perpendicular to its longitudinal axis, the segments are essentially unbent (e.g., bent less than the thickness of one composite wire) along the longitudinal axis of the coil as they span the individual coils of adjacent double pancakes.
  • the superconducting magnetic coil assembly can have a non-uniform inner and/or outer dimension along its length for providing field shaping or field concentration while allowing the use of substantially unbent pieces of composite superconductor wire which provide a low loss electrical interconnection between the double pancake coils of the assembly.
  • Providing the electrical interconnection with a relatively unbent piece of superconducting wire increases both the electrical and mechanical reliability of the interconnections. This is, for the most part, due to the mechanical properties of the materials chosen to provide the desired superconducting characteristics. Such materials, like those of the copper oxide ceramic type, are generally intolerant of the application of large tensional forces (such as those created during a bending process) and may easily crack or break when excessively bent. Such materials are often characterized by their bend strain and critical strain values. The bend strain is equal to half the thickness of the conductor divided by the radius of the bend; while the critical strain of a conductor is defined as the amount of strain the material can support before experiencing a dramatic decrease in electrical performance.
  • the critical strain value is highly dependent on the formation process used to fabricate the conductor, and is typically between 0.05%-1.0%, depending on the process used. With an increase in bend strain comes a concomitant increase in resistance and increase in voltage across the joint. If the bend strain of a conductor exceeds the critical strain of a conductor, the resistance increases to the extent that the current-carrying capability of the conductor, and hence the maximum magnetic field generated by a coil, decreases significantly.
  • Particular embodiments of the invention may include one or more of the following features.
  • the outer dimension of the coil assembly varies along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • the outer dimension of adjacent double pancake coils may be monotonically non-increasing (i.e., is constant or decreases) along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • the outer dimension of adjacent double pancake coils may be monotonically non-decreasing (i.e., is constant or increases) along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • a first one of the pair of individual pancake coils of at least one of the double pancakes may have a differing outer dimension than the other individual pancake of the pair.
  • one or more of the double pancakes may have a pair of individual pancake coils with outer dimensions which are substantially the same, but different than the outer dimensions of pancakes of another double pancake coil of the coil assembly.
  • the inner dimension of the coil assembly may be varied along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • the inner dimension of adjacent double pancake coils may be monotonically non-increasing (i.e., is constant or decreases) along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • the inner dimension of adjacent double pancake coils may be monotonically non-decreasing (i.e., is constant or increases) along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • a first one of the pair of individual pancake coils of at least one of the double pancakes may have a differing inner dimension than the other individual pancake of the pair.
  • a portion of the superconductor wire connecting the pair of individual pancake coils may be rigidly affixed to the pancake coil of smaller inner dimension on a side surface adjacent the other of the pair of individual pancake coils to provide mechanical support to that portion bridging the individual pancake coils.
  • one or more of the double pancakes may have a pair of individual pancake coils with inner dimensions which are substantially the same, but different than the inner dimensions of pancakes of another double pancake coil of the coil assembly.
  • a coil assembly may include double pancakes formed of individual pancakes, each double pancake wound to have the same inner diameter. The double pancakes, however, all have different inner diameters, and are coaxially positioned along a longitudinal axis to provide a coil assembly with a variable inner diameter.
  • a superconducting magnetic coil assembly having a variable inner dimension may also have its outer dimension vary along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • the outer dimension of adjacent double pancake coils may monotonically decrease or increase along the longitudinal axis of the superconducting magnetic coil from a central region to end regions of the superconducting magnetic coil.
  • One of the pair of individual pancake coils of at least one of the double pancakes may have a differing outer dimension than the other individual pancake of the pair.
  • the double pancake coils may be circularly shaped with the electrical connections between individual pancake coils of adjacent double pancake coils of substantially equivalent outer diameters.
  • the double pancake coils may be racetrack or saddle-shaped (i.e., outermost radial regions which droop).
  • the superconductor is an anisotropic high temperature superconductor, such as a member of the bismuth (e.g., Bi 2 Sr 2 Ca 2 Cu 3 O x or, Bi 2 Sr 2 Ca 1 Cu 2 O x (BSCCO 2223 or BSCCO 2212)) or yttrium families of oxide superconductors.
  • the superconductor may be formed as a superconductor tape, using monofilament or multi-filament composite superconductor.
  • a multi-filament composite superconductor generally includes individual superconducting filaments which extend the length of the multi-filament composite conductor and are surrounded by a matrix-forming material.
  • the multi-filament composite superconductor may, in certain applications, be twisted.
  • Electrically conductive bridging segments formed, for example, as a superconductor tape comprising a composite superconductor material, may be used to provide the electrical connections between individual pancake coils of adjacent double pancake coils.
  • a method for providing a superconducting magnetic coil assembly having a varying radial cross section along a longitudinal axis of the coil assembly comprising the steps of:
  • a superconducting double pancake coil in another embodiment, includes a first pancake coil having a first inner dimension and a superconductor wound about a longitudinal axis of the coil, a second pancake coil, having a second inner dimension different than said first dimension and a superconductor wound about the longitudinal axis of the coil, wherein the first and second pancake coils are wound from a continuous length of superconducting material.
  • Double pancake coils with varying inner and outer diameters can be combined to provide a desired field distribution within a fixed volume, for example to accommodate a constrained shape or a particular superconductor volume requirement.
  • a magnetic field may be maximized while reducing the amount of superconductor at its end regions.
  • inner and/or outer dimensions may be selected to provide a substantially uniform or specially shaped magnetic field along its axial length.
  • a mechanically robust, high-performance superconducting coil assembly 10 combines multiple double “pancake” coils 12-17, here, six separate double pancake sections, each having co-wound composite conductors.
  • Each double "pancake” coil has co-wound conductors wound in parallel which are then stacked coaxially on top of each other.
  • the illustrated conductor is a high temperature copper oxide ceramic superconducting material, such as Bi 2 Sr 2 Ca 2 Cu 3 O x , commonly designated BSCCO 2223.
  • Each double pancake coil 12-17 includes a pancake coil 12a-17a having a diameter smaller than its associated pancake coil 12b-17b of the double pancake, the two coils of a pair being wound from the same continuous length of superconducting tape using the approach described below in conjunction with Fig. 4.
  • Double pancake coils 12-17 are shown in Figs. 2 and 3 as being circularly shaped; however, in other applications each double pancake may have other shapes commonly used for making magnetic coils, including racetrack and saddle-shaped coils.
  • An inner support tube 18 supports coils 12-17 with a first end member 19 attached to the top of inner support tube 18 and a second end member 20 threaded onto the opposite end of the inner support tube in order to compress the double "pancake" coils.
  • Inner support tube 18 and end members 19, 20 are fabricated from a nonmagnetic material, such as aluminum or plastic (for example, G-10). In some applications, inner support tube 18 and end members 19, 20 can be removed to form a freestanding coil assembly. The current is assumed to flow in a counter-clockwise direction as shown in Fig. 3, with the magnetic field vector 26 along the axis (Fig. 2) being generally normal to end member 19 (in the direction of longitudinal axis 29) which forms the top of coil assembly 10.
  • Short bridging segments 22 of superconducting material are used to electrically connect the individual double pancake coils 12-17 together in a series circuit and are formed of the same Bi 2 Sr 2 Ca 2 Cu 3 O x material used for winding the coils themselves. Alternatively, a heavier bridging material may be used. Furthermore, segments 22 interconnect adjacent double pancakes along interfaces where the outer diameters of the individual pancakes are substantially the same. For example, a segment 22 is shown bridging pancakes 12b and 13a of double pancakes 12 and 13, respectively.
  • Short bridging segments 22 are only required along the outer diameter of the coil assembly because the interfaces between pancakes of different diameters lie along the inner diameter of the coil assembly 10 where no "joint" exists by virtue of the double pancake winding technique described immediately below in conjunction with Fig. 4. By providing adjacent pancake coils of substantially the same outer diameter, the superconductor bridging segments need not be bent or otherwise tensioned, thereby avoiding the undesirable effects noted above.
  • a length of superconducting material (not shown) also connects one end of coil assembly 10 to one of the termination posts 24 located on end member 18 in order to supply current to coil assembly 10.
  • the bridging segments may be fabricated from metal, composite superconductor, or a pure superconductor.
  • the distribution of superconductor along the axial length of coil assembly 10 is not uniform but includes a greater amount of superconductor at central regions of the assembly than at end regions.
  • This configuration of double pancakes 12-17 is well suited for applications in which an increase in the magnetic field at a center region 23 of coil assembly 10 is desired and the level of magnetic field at outer end regions 25 of the coil is of less importance.
  • the level of magnetic field could be accomplished using a superconducting magnetic coil having a uniform outer diameter equal to that of the largest diameter pancake of coil assembly 10, for example, pancakes 14b and 15a, this magnetic field would have been achieved using a greater amount of superconductor, which is then required to be cooled, and therefore is less energy efficient.
  • seven double pancake coils were coaxially aligned along a longitudinal axis providing a superconducting magnetic coil assembly having a height of 7.0 cm (2.75 inches).
  • the seven double pancake coils were wound with BSCCO 2223/silver superconducting composite tape and all have an inner diameter of 1.125 inches defining the inner bore of the coil assembly.
  • Three of the seven double pancake coils were of the conventional type (i.e., individual pancakes of the same outer diameter) and have an outer diameter of about 15.2 cm (6.0 inches).
  • Two of the other seven double pancake coils were also of the conventional type and have an outer diameter (O.D.) of about 12.7 cm (5.0 inches). These two double pancake coils were positioned at each end of the coil assembly.
  • each of these two double pancake coils act as transition coils, and include an individual pancake having an outer diameter of 12.7 cm (5.0 inches) and an individual pancake having an outer diameter 15.2 cm (6.0 inches). Electrical interconnections between the double pancake coils were provided with short lengths of the same composite superconducting tape used to wind the double pancake coils.
  • This superconducting magnetic coil assembly provided a center axial magnetic field of 2.1 Tesla when cooled by a mechanical cryocooler at 27°K.
  • a mandrel 30 is first mounted on a winding shaft 32 which is mounted in lathe chuck 31.
  • a storage spool 36 is mounted on the winding shaft 32, and a first portion of the total length of tape 33, initially wrapped around spool 34 and needed for winding one of the pancakes (generally the larger diameter pancake), is wound onto the storage spool 36, resulting in the length of tape 33 being shared between the two spools.
  • the spool 34 mounted to the arm 35 contains the first portion of the length of tape 33, and the storage spool 36 containing the second portion of the tape 33 is secured so that it does not rotate relative to mandrel 30.
  • the cloth 37 wound on the insulation spool 38 is then mounted on the arm 35.
  • the mandrel is then rotated, and the cloth 37 is co-wound onto the mandrel 30 with the first portion of the tape 33 to form a single "pancake” coil.
  • Thermocouple wire is wrapped around the first "pancake” coil in order to secure it to the mandrel.
  • the winding shaft 32 is then removed from the lathe chuck 31, and the storage spool 36 containing the second portion of the length of tape 33 is mounted on arm 35.
  • a layer of insulating material is then placed against the first "pancake” coil, and the second half of the tape 33 and the cloth 37 are then co-wound on the mandrel 30 using the process described above.
  • Multiple layers of superconductor may be alternatingly wound with layers of insulating material to form the coils.
  • Layers of strengthening material may also be wound between the layers of superconductor.
  • Other approaches for forming the double pancake coils, such as the well-known react-and-wind method may also be used.
  • the arrangement of double pancake coils described above and shown in Figs 2 and 3 provides a relatively energy efficient superconducting coil assembly where the magnetic field is high at the center of the coil.
  • the concept of the invention can also be used to provide a superconducting magnetic coil, wound with an anisotropic superconductor material, where the objective is to achieve uniformity of the current carrying capacity of the coil across its axial length.
  • the outer diameters of double pancakes 60-65 become increasingly larger from a center region 67 of the coil to the end regions 69 in order to compensate for the decrease in current carrying capacity which is related to the magnitude of the perpendicular component of the magnetic field.
  • the perpendicular component of the magnetic field is at a minimum in the central region of the coil where the lines are generally parallel with the longitudinal axis of the coil and becomes increasingly perpendicular at end regions where the flux lines bend around to close the loop.
  • any arrangement of pairs of pancake coils where the outer diameter of adjacent pancakes are substantially the same can be used to provide the desired magnetic field characteristic of the coil assembly.
  • coil assemblies having double pancakes wound to have pancakes of different diameters can be used equally as well with individual pancakes or with double pancake coils of uniform outer diameter.
  • the coil assemblies may have a longitudinal, outer diameter profile which, from a central region of the coil, increases or decreases along the longitudinal axis toward the end regions of the coil.
  • the outer diameter profile may be stepped up and down along the axis of the coil to provide any desired field shaping profile or to accommodate a constrained geometry, such as the rotor coil of a motor.
  • the concept of the invention is also applicable to superconducting magnetic coils of various shapes including racetrack magnets, solenoids and multipole magnets.
  • a coil assembly with this arrangement may be provided using, for example, double pancakes having the same outer diameter, but each having a different inner diameter (the individual pancakes of each double pancake having the same inner diameter).
  • the double pancakes are then positioned along a longitudinal axis of the coil assembly so that, for example, the inner diameter of the assembly monotonically increases or decreases along the axis.
  • double pancake coils positioned along a longitudinal axis 100 of their respective coil assemblies 80, 90, have individual pancakes of different inner diameter.
  • Short lengths of bridging segments 81 are used to electrically interconnect the adjacent double pancakes of different inner diameter at interfaces along the outer diameter of the coil.
  • an inner support tube may or may not be used to support the individual double pancakes.
  • superconducting magnetic coil assembly 80 includes pancake coils 82-87 arranged so that their inner diameters decrease from a center region 88 of the coil to end regions 89.
  • Such an arrangement might be desirable for superconductive motor or superconducting accelerometer applications.
  • one or more stators may be manufactured using superconducting double pancakes having a varying inner diameter like that shown in Fig. 6. In this way, the stators can closely follow the outer shape of the rotor positioned within the inner bore.
  • a superconducting magnetic coil assembly 90 includes pancake coils 92-97 with their inner diameters increasing from a center region 98 to end regions 99.
  • a coil having this arrangement might be attractive in magnetic resonance imaging and chemical spectroscopy applications.
  • the individual pancake coils 92a-92b, 97a-97b which make up outer pancake coils 92 and 97, respectively are of the configuration, described above in conjunction with Figs. 2 and 3. That is, the inner diameters of these double pancake coils are substantially constant, with different outer diameters.
  • Pancake coils 82-87 and 93-96 of Figs. 6 and 7, respectively, are wound in the same general manner as described in conjunction with Fig. 4.
  • the mandrel would be configured to have portions with different outer diameters, each for accommodating winding of the individual pancakes of the double pancake. For example, a first portion of the superconducting tape is wound over a first outer diameter portion of the mandrel to form the first of the "single" pancake coils. The remaining tape on the storage spool is then moved to the arm and the second of the two individual pancakes is wound over the second different outer diameter portion of the mandrel.
  • a guide or track element may be provided to lend support to the tape at the transition between individual pancakes.
  • Such a guide element may be necessary to reduce possible fracturing of the tape or bending strains which can adversely effect the current carrying capability of the tape.
  • a side view of a representative one of the double pancake coils of coil assembly 90 shows the interface between the individuals pancakes 94a and 94b of double pancake 94.
  • a spiral portion 102 of the superconducting tape unwinds from the inner diameter of pancake 94a to the inner diameter of 94b.
  • the spiral portion 102 of the tape is rigidly fixed to inner side surface 104 of pancake 94b to provide mechanical support to the spiral portion.
  • a superconducting coil assembly 110 includes double pancake coils 114-119 positioned along a longitudinal axis 112 of the coil assembly.
  • each double pancake includes a pair of individual pancake coils having the same inner and outer diameters.
  • adjacent double pancakes of coil assembly 110 have differing inner diameters, thereby providing a coil assembly of varying inner diameter.
  • the inner diameter of the coil assembly may vary to accommodate any constrained shape or superconductor volume requirement, including as shown here, an inner diameter which increases from a center region to end regions of the coil assembly.
  • the approach described above in conjunction with Fig. 4 may be used to form each of the double pancakes 114-119.
  • Such coils can be arranged to provide a field with a high level of homogeneity or one with a high magnitude level at a specific area.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Particle Accelerators (AREA)

Claims (32)

  1. Ensemble de bobines magnétiques supraconductrices comprenant :
    au moins une pluralité de bobines plates ou galettes disposées coaxialement le long d'un axe longitudinal de l'ensemble de bobines, chaque double galette ayant une paire de galettes individuelles, chaque galette individuelle comprenant un supraconducteur anisotrope à température élevée enroulé autour d'un axe longitudinal de l'ensemble de bobines et définissant un orifice de l'ensemble de bobines magnétiques supraconductrices, chaque double galette étant connectée électriquement à une galette adjacente, l'ensemble de bobines formé de galettes connectées électriquement ayant une section transversale radiale variable par rapport à l'axe longitudinal, autour duquel l'orifice est centré.
  2. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel chaque galette individuelle comprend un bord interne parallèle à l'axe longitudinal et un espacement entre un bord interne des galettes individuelles et l'axe longitudinal varie le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  3. Ensemble de bobines magnétiques supraconductrices selon la revendication 2, dans lequel l'espacement entre le bord interne des galettes individuelles et l'axe longitudinal n'augmente pas de manière monotone le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  4. Ensemble de bobines magnétiques supraconductrices selon la revendication 2, dans lequel l'espacement entre le bord interne des galettes individuelles et l'axe longitudinal ne diminue pas de manière monotone le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  5. Ensemble de bobines magnétiques supraconductrices selon la revendication 2, dans lequel chaque galette individuelle comprend un bord externe parallèle à l'axe longitudinal et un espacement entre un bord externe des galettes individuelles et l'axe longitudinal varie le long le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  6. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel chaque galette individuelle comprend un bord externe parallèle à l'axe longitudinal et un espacement entre un bord externe des galettes individuelles et l'axe longitudinal varie le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  7. Ensemble de bobines magnétiques supraconductrices selon la revendication 6, dans lequel l'espacement entre le bord externe des galettes individuelles et l'axe longitudinal n'augmente pas de manière monotone le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  8. Ensemble de bobines magnétiques supraconductrices selon la revendication 6, dans lequel l'espacement entre le bord externe des galettes individuelles et l'axe longitudinal ne diminue pas de manière monotone le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  9. Ensemble de bobines magnétiques supraconductrices selon la revendication 5, dans lequel l'espacement entre le bord externe des galettes individuelles et l'axe longitudinal augmente le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  10. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel chaque galette individuelle comprend un bord interne parallèle à l'axe longitudinal, et un espacement entre un bord interne des galettes individuelles et l'axe longitudinal varie le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice et une première de la paire de galettes individuelles d'au moins l'une des doubles galettes a un espacement entre un bord interne et l'axe longitudinal différent de l'autre galette individuelle de la paire.
  11. Ensemble de bobines magnétiques supraconductrices selon la revendication 10, dans lequel une partie du supraconducteur connectant la paire de galettes individuelles est fixée de manière rigide à la galette de moindre dimensions internes sur une surface latérale adjacente à l'autre de la paire de galettes individuelles.
  12. Ensemble de bobines magnétiques supraconductrices selon la revendication 2, dans lequel une première de la paire de galettes individuelles d'au moins l'un des doubles galettes a un espacement entre le bord interne de la galette individuelle et l'axe longitudinal sensiblement la même que l'autre galette individuelle de la paire, l'espacement entre un bord interne et l'axe longitudinal de la au moins un double galette étant différent de l'espacement entre un bord interne des galettes individuelles et l'axe longitudinal d'au moins une autre double galette de l'ensemble de bobines.
  13. Ensemble de bobines magnétiques supraconductrices selon la revendication 12, dans lequel chacune de la paire de galettes individuelles de chaque double galette a un espacement entre un bord intérieur et l'axe longitudinal qui est sensiblement le même que l'autre galette individuelle de la paire, au moins une double galette ayant un espacement entre un bord interne de la galette individuelle et l'axe longitudinal différent d'un autre double galette de l'ensemble de bobines.
  14. Ensemble de bobines magnétiques supraconductrices selon la revendication 2, dans lequel chaque galette individuelle comprend un bord externe parallèle à l'axe longitudinal et une première de la paire de galettes individuelles d'au moins l'une des doubles galettes a un espacement entre un bord externe de la galette individuelle et l'axe longitudinal différent de l'autre galette individuelle de la paire.
  15. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel les galettes individuelles de chaque double galette sont connectées électriquement à une galette individuelle d'une double galette adjacente le long d'un bord externe de la double galette adjacente.
  16. Ensemble de bobines magnétiques supraconductrices selon la revendication 15, dans lequel chaque galette individuelle comprend un bord externe parallèle à l'axe longitudinal et un espacement entre le bord externe de doubles galettes adjacentes et l'axe longitudinal n'augmente pas de manière monotone le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  17. Ensemble de bobines magnétiques supraconductrices selon la revendication 15, dans lequel chaque galette individuelle comprend un bord externe parallèle à l'axe longitudinal et un espacement compris entre le bord externe de galettes individuelles et l'axe longitudinal de doubles galettes adjacentes ne diminue pas de manière monotone le long de l'axe longitudinal de la bobine magnétique supraconductrice d'une région centrale à des régions d'extrémité de la bobine magnétique supraconductrice.
  18. Ensemble de bobines magnétiques supraconductrices selon la revendication 15, dans lequel chaque galette individuelle comprend un bord externe parallèle à l'axe longitudinal et une première de la paire de galettes individuelles d'au moins l'une des doubles galettes a un espacement entre le bord externe de la galette individuelle et l'axe longitudinal différent de l'autre galette individuelle de la paire.
  19. Ensemble de bobines magnétiques supraconductrices selon la revendication 15, dans lequel chaque galette individuelle comprend un bord externe parallèle à l'axe longitudinal et une première de la paire de galettes individuelles d'au moins l'une des doubles galettes a un espacement entre le bord externe de la galette individuelle et l'axe longitudinal sensiblement le même que l'autre galette individuelle de la paire, l'espacement entre le bord externe de la galette individuelle et l'axe longitudinal de la moins une double galette étant différent de l'espacement entre un bord externe des galettes individuelles et l'axe longitudinal d'au moins une autre double galette de l'ensemble de bobines.
  20. Ensemble de bobines magnétiques supraconductrices selon la revendication 19, dans lequel chacune de la paire de galettes individuelles de chaque double galette a un espacement entre le bord externe de la galette individuelle et l'axe longitudinal sensiblement le même que l'autre galette individuelle de la paire, au moins un double galette ayant un espacement entre un bord externe des galettes individuelles et l'axe longitudinal différent d'une autre double galette de l'ensemble de bobines.
  21. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel les doubles galettes ont une forme circulaire.
  22. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel les doubles galettes sont en forme de pistes de courses.
  23. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel les doubles galettes ont une forme de selle.
  24. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel le supraconducteur anisotrope à haute température est un élément de la famille des supraconducteurs d'oxyde de bismuth.
  25. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel le supraconducteur anisotrope à haute température est un élément de la famille des supraconducteurs d'oxydes d'yttrium.
  26. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel le supraconducteur se présente sous la forme d'un ruban supraconducteur comprenant un supraconducteur composite multifilamentaire comprenant des filaments supraconducteurs individuels qui s'étendent sur la longueur du conducteur composite multifilamentaire et sont entourés ou supportés par un matériau formant matrice.
  27. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel des segments de pontage conducteurs de l'électricité fournissent les connexions électriques entre les galettes individuelles de doubles galettes adjacentes.
  28. Ensemble de bobines magnétiques supraconductrices selon la revendication 27, dans lequel les segments de pontage conducteurs de l'électricité se présentent sous la forme d'un ruban supraconducteur comprenant un matériau supraconducteur composite.
  29. Ensemble de bobines magnétiques supraconductrices selon la revendication 1, dans lequel au moins l'une des doubles galettes comprend une paire de galettes enroulées autour de l'axe longitudinal à partir d'une longueur continue de matériau supraconducteur.
  30. Procédé pour mettre en oeuvre un ensemble de bobines magnétiques supraconductrices ayant une section transversale radiale variable le long d'un axe longitudinal de l'ensemble de bobines comprenant les étapes suivantes :
    a) on met en oeuvre des doubles galettes, chacune comprenant une paire de galettes enroulées à partir d'une longueur continue d'un supraconducteur anisotrope à haute température autour de l'axe longitudinal de l'ensemble de bobines, chaque galette individuelle comprenant un bord externe et un bord interne tous deux parallèles à l'axe longitudinal, et au moins l'une desdites doubles galettes comprenant une paire de galettes ayant un espacement différent entre un bord interne des galettes individuelles et l'axe longitudinal;
    b) on positionne coaxialement les doubles galettes le long de l'axe longitudinal de sorte qu'au moins une galette de chaque double galette ait un espacement entre un bord externe de la galette individuelle et l'axe longitudinal sensiblement égal à un espacement entre un bord externe de la galette individuelle et l'axe longitudinal d'une galette adjacente d'une double galette adjacente; et
    c) on connecte électriquement la au moins une galette de chaque double galette à la galette de la double galette adjacente ayant un espacement sensiblement égal entre un bord externe de la galette individuelle et l'axe longitudinal.
  31. Procédé selon la revendication 30 comprenant en outre l'étape de fixation rigide d'une partie du supraconducteur connectant la paire de galettes à la galette ayant un espacement plus petit entre un bord interne de la galette individuelle et l'axe longitudinal sur une surface latérale adjacente à l'autre de la paire de galettes individuelles.
  32. Procédé selon la revendication 30, comprenant en outre l'étape de connexion des doubles galettes avec une longueur sensiblement non repliée de matériau supraconducteur.
EP95939529.4A 1994-10-13 1995-10-13 Bobine magnetique supraconductrice a profil variable Expired - Lifetime EP0786141B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE69531693.1T DE69531693T3 (de) 1994-10-13 1995-10-13 Supraleitende magnetspule mit variablem profil

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US32282594A 1994-10-13 1994-10-13
US08/323,494 US5604473A (en) 1994-10-13 1994-10-13 Shaped superconducting magnetic coil
US322825 1994-10-13
US323494 1994-10-13
US541639 1995-10-10
US08/541,639 US5581220A (en) 1994-10-13 1995-10-10 Variable profile superconducting magnetic coil
PCT/US1995/013359 WO1996012288A1 (fr) 1994-10-13 1995-10-13 Bobine magnetique supraconductrice a profil variable

Publications (4)

Publication Number Publication Date
EP0786141A1 EP0786141A1 (fr) 1997-07-30
EP0786141A4 EP0786141A4 (fr) 1997-12-17
EP0786141B1 true EP0786141B1 (fr) 2003-09-03
EP0786141B2 EP0786141B2 (fr) 2013-10-23

Family

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EP (1) EP0786141B2 (fr)
JP (1) JPH10507589A (fr)
CN (1) CN1088246C (fr)
AU (1) AU694296B2 (fr)
CA (1) CA2201715A1 (fr)
DE (1) DE69531693T3 (fr)
NZ (1) NZ296653A (fr)
WO (1) WO1996012288A1 (fr)

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JP2007073623A (ja) * 2005-09-05 2007-03-22 Kobe Steel Ltd 超電導コイル製造用巻枠および超電導ソレノイド巻コイル
JP5201551B2 (ja) * 2008-08-06 2013-06-05 株式会社Ｉｈｉ 超電導コイル及び磁場発生装置
JP5198193B2 (ja) * 2008-09-12 2013-05-15 株式会社神戸製鋼所 超電導マグネットおよびその製造方法
JP6199628B2 (ja) * 2013-06-28 2017-09-20 株式会社東芝 超電導コイル装置
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Also Published As

Publication number Publication date
CN1088246C (zh) 2002-07-24
WO1996012288A1 (fr) 1996-04-25
CN1160454A (zh) 1997-09-24
DE69531693D1 (de) 2003-10-09
NZ296653A (en) 1999-01-28
AU4131496A (en) 1996-05-06
EP0786141B2 (fr) 2013-10-23
DE69531693T2 (de) 2004-07-15
EP0786141A4 (fr) 1997-12-17
DE69531693T3 (de) 2014-04-10
EP0786141A1 (fr) 1997-07-30
CA2201715A1 (fr) 1996-04-25
AU694296B2 (en) 1998-07-16
JPH10507589A (ja) 1998-07-21

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