WO2016092882A1 - Élément de positionnement de bobines en double galette, procédé de fabrication de dispositif à aimant supraconducteur, et dispositif à aimant supraconducteur - Google Patents

Élément de positionnement de bobines en double galette, procédé de fabrication de dispositif à aimant supraconducteur, et dispositif à aimant supraconducteur Download PDF

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Publication number
WO2016092882A1
WO2016092882A1 PCT/JP2015/064731 JP2015064731W WO2016092882A1 WO 2016092882 A1 WO2016092882 A1 WO 2016092882A1 JP 2015064731 W JP2015064731 W JP 2015064731W WO 2016092882 A1 WO2016092882 A1 WO 2016092882A1
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Prior art keywords
coil
pancake coil
double
pancake
axis
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PCT/JP2015/064731
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English (en)
Japanese (ja)
Inventor
武志 井村
彰一 横山
松田　哲也
井上　達也
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三菱電機株式会社
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Priority to JP2016563537A priority Critical patent/JP6239148B2/ja
Publication of WO2016092882A1 publication Critical patent/WO2016092882A1/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 present invention relates to a double pancake for a superconducting electromagnet apparatus used in the field of acquiring an internal image of a living body and a molecular structure of a substance by utilizing a nuclear magnetic resonance phenomenon such as MRI (Magnetic Resonance Magnetic Resonance) and NMR (Nuclear Magnetic Resonance).
  • a double pancake coil positioning member used for positioning the coil, a superconducting electromagnet apparatus manufacturing method using the double pancake coil positioning member, and the double pancake coil positioning member are incorporated.
  • the present invention relates to a superconducting electromagnet apparatus.
  • a superconducting electromagnet apparatus that utilizes nuclear magnetic resonance phenomena such as MRI and NMR requires a high uniformity magnetic field on the order of several ppm at the center of the magnet, which is the imaging space inside the electromagnet.
  • the magnetic field fluctuates on the order of several tens to several hundred ppm if a superconducting coil position error occurs during the assembly of the superconducting coils.
  • the outer peripheral wall cylinder connected to the outer periphery of the superconducting coil is provided with a step with a smaller inner diameter at the deeper part of the center, and this step determines the position of the superconducting coil in the axial direction.
  • Such a superconducting electromagnet apparatus is known (see, for example, Patent Document 1).
  • a superconducting electromagnet apparatus in which a plurality of pancake coils are externally fitted to a cylindrical portion of a bobbin and a plurality of pancake coils are stacked (for example, see Patent Document 2).
  • JP 2008-034525 A Japanese Patent Laid-Open No. 06-151168
  • An object of the present invention is to solve such a problem, and there is no limitation on the outer diameter of the coil body due to the axial position, and there is no limitation on the position of the double pancake coil in the axial direction. It is an object of the present invention to provide a double pancake coil positioning member that can be arranged in a coil, reduces a positional error when the coil body is assembled, and obtains a highly uniform magnetic field in a magnet internal space.
  • Another object of the present invention is to obtain a method for manufacturing a superconducting electromagnet apparatus, in which a superconducting electromagnet apparatus is manufactured using the double punch coil positioning member.
  • an object is to obtain a superconducting electromagnet apparatus incorporating this double pancake coil positioning member.
  • Double pancake coil positioning member Double pan used for positioning the double pancake coil in a superconducting electromagnet apparatus in which a hollow cylindrical coil body formed by laminating a plurality of double pancake coils along the axis is housed in a vacuum vessel A cake coil positioning member,
  • Each of the double pancake coils includes a hollow disc-shaped insulating spacer, and a hollow disc-shaped first single pancake coil and a second single pancake provided on both sides of the insulating spacer in the direction of the axis.
  • Each of the insulating spacers has, at an inner diameter side end, a protruding portion that protrudes radially inward from the inner peripheral surface of each of the first single pancake coil and the second single pancake coil, and Arranged in the axial direction at a position that is the center of density of the current of the first single pancake coil and the current of the second single pancake coil;
  • a plurality of circumferentially extending grooves that are in surface contact with the inner peripheral surface of the coil body and are fitted into the protruding portions of the insulating spacers are formed on the outer peripheral surface at intervals along the direction of the axis. ing.
  • Double pancake coil positioning member Double pan used for positioning the double pancake coil in a superconducting electromagnet apparatus in which a hollow cylindrical coil body formed by laminating a plurality of double pancake coils along the axis is housed in a vacuum vessel A cake coil positioning member,
  • Each of the double pancake coils includes a hollow disc-shaped insulating spacer, and a hollow disc-shaped first single pancake coil and a second single pancake coil provided on both sides of the insulating spacer in the axial direction.
  • Each of the insulating spacers has, at an outer diameter side end portion, a protruding portion that protrudes radially outward from the outer peripheral surface of each of the first single pancake coil and the second single pancake coil, and Arranged in the axial direction at a position that is the center of density of the current of the first single pancake coil and the current of the second single pancake coil;
  • a plurality of circumferentially extending grooves that are in surface contact with the outer peripheral surface of the coil body and fit into the protruding portions of the insulating spacers are formed on the inner peripheral surface at intervals along the direction of the axis. ing.
  • the method of manufacturing a superconducting electromagnet device is as follows: A method of manufacturing an electroconductive magnet device using a double pancake coil positioning member, Laminating a plurality of double pancake coils along the axis; And a step of bringing the double pancake coil positioning member into surface contact with the coil body and inserting a groove into the protruding portion of each insulating spacer.
  • the superconducting electromagnet apparatus is: A vacuum vessel; A hollow cylindrical coil body configured by laminating a plurality of double pancake coils stored in the vacuum container along the direction of the axis, and A double pancake coil position in which a plurality of circumferentially extending grooves are formed on the outer peripheral surface at intervals along the axis direction, provided on the inner diameter side of the coil body along the axis.
  • a dispensing member, Each of the double pancake coils includes a hollow disc-shaped insulating spacer, and a hollow disc-shaped first single pancake coil and a second single pancake provided on both sides of the insulating spacer in the direction of the axis.
  • Each of the insulating spacers has, at an inner diameter side end portion, a protruding portion that protrudes radially inward from the inner peripheral surface of each of the first single pancake coil and the second single pancake coil, In the double pancake coil positioning member, the protrusion is inserted into the groove.
  • the superconducting electromagnet apparatus is: A vacuum vessel; A hollow cylindrical coil body configured by laminating a plurality of double pancake coils stored in the vacuum container along the direction of the axis, and A double pancake that is provided on the outer diameter side of the coil body along the axis, and in which a plurality of grooves extending in the circumferential direction are formed on the inner circumferential surface at intervals along the direction of the axis.
  • a coil positioning member, Each of the double pancake coils includes a hollow disc-shaped insulating spacer, and a hollow disc-shaped first single pancake coil and a second single pancake provided on both sides of the insulating spacer in the direction of the axis.
  • Each of the insulating spacers has, at an outer diameter side end portion, a protruding portion that protrudes radially outward from the outer peripheral surface of each of the first single pancake coil and the second single pancake coil, In the double pancake coil positioning member, the protrusion is inserted into the groove.
  • the double pancake coil positioning member According to the double pancake coil positioning member according to the present invention, a plurality of grooves that are in surface contact with the peripheral surface of the coil body and are fitted into the protruding portions of the respective insulating spacers are formed in the double pancake coil positioning member. Therefore, at the time of stacking and assembling a plurality of double pancake coils, by using this double pancake coil positioning member, the position of each double pancake coil is determined by the position of the groove. Accordingly, the positional error when the double pancake coils are stacked is reduced, thereby improving the deviation of the current center of the double pancake coils and reducing the magnetic field non-uniformity in the magnet internal space when manufacturing the superconducting electromagnet apparatus. It is possible to eliminate the adjustment work of the spatial uniformity by shimming or reduce the adjustment load.
  • the double pancake coil positioning member is brought into surface contact with the coil body, and each insulation Since the groove of the double pancake coil positioning member is inserted into the protrusion of the spacer, the time for laminating each double pancake coil can be shortened, and each double pancake coil is laminated with high positional accuracy by simple work. .
  • the protrusions of the respective insulating spacers are fitted in the grooves of the double pancake coil positioning members that are in surface contact with the peripheral surface of the coil body.
  • the cake coil is held at a predetermined position in the manufacturing process of the coil body and is fixed for a long period of time, thereby preventing the deviation of the current center of the double pancake coil for a long period of time, and the magnetic field uniformity of the magnet internal space for a long period of time. Can be secured.
  • FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is principal part side sectional drawing which shows the coil body of the superconducting electromagnet apparatus of Embodiment 2 of this invention. It is principal part sectional drawing which shows the modification of the coil body of FIG.
  • FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. It is a front view which shows the coil body of the superconducting electromagnet apparatus at the time of removing the double pancake coil positioning member from the superconducting electromagnet apparatus of Embodiment 4 of this invention.
  • FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11.
  • FIG. 1 is a front view showing a conventional MRI superconducting electromagnet apparatus 1
  • FIG. 2 is a side sectional view of FIG.
  • a coil body 4 composed of a plurality of superconducting coils is enclosed in a hollow cylindrical cryogenic container 6.
  • a magnet internal space 7 penetrating in the direction of the axis 5 of the coil body 4, and a subject for obtaining a cross-sectional image enters the magnet internal space 7.
  • the refrigerator 2 is attached to the upper part of the cryogenic container 6.
  • the refrigerator 2 is thermally connected to the coil body 4 via a conductive cooling member 3 penetrating the cryogenic container 6.
  • the superconducting coil forming the coil body 4 needs to be cooled below the critical temperature of the superconducting wire used in the superconducting coil in order to be in a superconducting state without resistance.
  • the coil body 4 is cooled below the critical temperature of the superconducting wire. Note that the inside of the cryogenic container 6 is in a vacuum state in order to reduce heat intrusion from outside air.
  • the MRI superconducting electromagnet apparatus 1 measures the nuclear magnetic resonance signal emitted by the hydrogen nuclear spin inside the subject due to the NMR phenomenon, thereby imaging the inside of the subject based on the hydrogen nucleus density.
  • the magnet internal space 7 into which the subject enters needs a magnetic field having high intensity, high stability, and high uniformity in the imaging space.
  • the magnetic field strength of the MRI apparatus used in clinical practice is 0.2 T or more, and the magnetic field strength of 1.5 T is mainstream at present.
  • a superconducting electromagnet using a superconducting coil capable of passing a large current as a magnet is used.
  • a highly uniform magnetic field of 2 ppm or less is generally required as a highly uniform magnetic field in the imaging space for obtaining a clear image.
  • a shim is performed to remove the magnetic field non-uniformity.
  • shim adjustment an additional coil is placed in the superconducting electromagnet device, and the magnetic field in the imaging space is determined by the current value of the added coil. Adjust the uniformity.
  • This additional coil may be a copper coil or a superconducting coil.
  • an iron piece or a superconducting piece having good magnetic properties is arranged on the outer wall portion of the magnet inner space 7 and is magnetized by the electromagnet to produce its own magnetic field.
  • the magnetic field uniformity in the imaging space is adjusted. Whichever shim adjustment method is used, an additional coil, an iron piece, and the like are required, and a shim adjustment operation is also required, which increases the manufacturing cost. Therefore, there is a need for a design method for the coil body 4 having a magnetic field uniformity of 2 ppm or less and a manufacturing method that reduces variations during superconducting electromagnet manufacture.
  • FIG. 3 shows an example of the deterioration of the magnetic field uniformity due to the manufacturing variation.
  • FIG. 3 shows an example of calculating the magnetic field non-uniformity when there is a position error in the direction of the axis 5 in one of the superconducting coils forming the coil body 4.
  • the spatial uniformity satisfies 2 ppm or less, but the spatial uniformity deteriorates to 100 ppm or more just by causing an error of 0.5 mm in the superconducting coil. ing.
  • the influence of the position error in the direction of the axis 5 of the superconducting coil on the spatial uniformity is large, and a method for assembling the superconducting coil with a smaller error is required.
  • FIG. 4 is a front view showing the coil body 4 of the superconducting electromagnet apparatus 1 according to Embodiment 1 of the present invention
  • FIG. 5 is a cross-sectional view taken along the line VV in FIG.
  • the hollow cylindrical coil body 4 is configured by arranging a plurality of double pancake coils 13 on the same axis 5 at the same interval.
  • Each double pancake coil 13 has the same single axis 5 and an inner diameter of a hollow disc-shaped first single pancake coil 11a and second single pancake coil 11b wound with a high-temperature superconducting wire.
  • a hollow disc-like shape which is disposed between the first single pancake coil 11a and the second single pancake coil 11b and has the same axis 5 as the first and second single pancake coils 11a and 11b.
  • the insulating spacer 12 is used.
  • the adjacent double pancake coils 13 have the same axis 5 and inner diameter, but have different outer diameters.
  • Each insulating spacer 12 has an inner diameter smaller than the inner diameters of the first and second single pancake coils 11a, 11b, and the first and second single pancake coils 11a, 11b at the inner diameter side end portions over the entire circumference. Projecting portion 12a projecting radially inward.
  • each double pancake coil positioning member 21 On the inner diameter side of the coil body 4, three double pancake coil positioning members 21 are provided that are equally spaced along the circumferential direction and extend over the entire area of the coil body 4 along the direction of the axis 5.
  • Each double pancake coil positioning member 21 having a bowl-shaped cross section is formed with grooves 21a at equal intervals of 120 ° along the direction of the axis 5 on the outer peripheral surface and extending over the entire region in the circumferential direction. .
  • each double pancake coil 13 By inserting the groove 21 a into the protruding portion 12 a of the insulating spacer 12, each double pancake coil 13 is positioned and fixed with a smaller error in the direction of the axis 5 and the radial direction.
  • the depth of the groove 21a is larger than the height of the protruding portion 12a.
  • the double pancake coil positioning member 21 is made of, for example, stainless steel or glass epoxy resin.
  • the double pancake coil 13 is manufactured such that the current center 31 is located at the center of the insulating spacer 12 in the direction of the axis 5 of the insulating spacer 12.
  • the current center 31 of the double pancake coil 13 is a position that is the center of the density of the current of the first single pancake coil 11a and the current of the second single pancake coil 11b.
  • the single pancake coil 11a and the second single pancake coil 11b are composed of superconducting wires having the same width and wound in the same turn, whereby the current center 31 of the double pancake coil 13 is an insulating spacer. It is in the center in the direction of 12 axes 5.
  • the protruding portions 12a of the insulating spacers 12 are fitted into the grooves 21a of the double pancake coil positioning member 21 in surface contact with the inner peripheral surface of the coil body 4.
  • the double pancake coil positioning member 21 is in surface contact with the inner peripheral surface of the coil body 4, and a plurality of circumferentially extending grooves 21a that are fitted into the protruding portions 12a of the respective insulating spacers 12 are formed on the outer peripheral surface. Therefore, at the time of stacking and assembling the plurality of double pancake coils 13, by using this double pancake coil positioning member 21, the position of each double pancake coil 13 is determined by the position of the groove 21a.
  • the positional error when the double pancake coils 13 are stacked can be reduced, whereby the deviation of the current center 31 of the double pancake coils 13 can be improved, and the magnetic field in the magnet internal space 7 can be reduced when the superconducting electromagnet apparatus 1 is manufactured.
  • the uniformity can be reduced, and the adjustment work of the spatial uniformity by shimming can be eliminated or the adjustment load can be reduced.
  • each double pancake coil 13 is held at a predetermined position in the manufacturing process of the coil body 4 and is fixed for a long period of time, thereby preventing the shift of the current center 31 of the double pancake coil for a long period of time.
  • the magnetic field uniformity of the internal space 7 can be ensured over a long period of time.
  • a plurality of double pancake coils 13 are laminated along the axis 5, and then the double pancake coils 13 are brought into surface contact with the coil body 4, and each insulating spacer Since the groove 21a of the double pancake coil positioning member 21 is inserted into the 12 protruding portions 12a, the double pancake coils 13 are stacked with high positional accuracy by a short simple operation.
  • a plurality of double pancake coils 13 are stacked along the axis 5, and then three double pancake coil positioning members 21 are arranged on the donut-shaped coil body 4. They are in surface contact from the inside and are arranged at equal intervals along the circumferential direction. Therefore, each double pancake coil 13 is more reliably positioned and fixed at a predetermined position.
  • the first single pancake coil 11a and the second single pancake coil 11b have the same inner diameter, and the groove 21a is formed by the protrusion 12a. Deeper than height. Therefore, when the groove 21a of the double pancake coil positioning member 21 is fitted into the protruding portion 12a of each insulating spacer 12, the outer peripheral surface of the double coil coil positioning member 21 is necessarily the first and second singles.
  • the inner peripheral surface of the coil body 4 is uniform over the entire area in the direction of the axis 5 and the inner space 7 of the magnet inner space 7 due to the radial displacement of the double pancake coil 1 is in surface contact with the inner peripheral surfaces of the pancake coils 11a and 11b. The deterioration of the magnetic field uniformity in the imaging space can be prevented.
  • the superconducting wire which comprises the 1st and 2nd single pancake coils 11a and 11b is a high temperature superconducting wire, the temperature which should cool the single pancake coils 11a and 11b becomes high, and the capability of the refrigerator 2 Can be lowered. Therefore, it becomes possible to constitute the superconducting electromagnet apparatus 1 with a cheaper refrigerator 2, and the manufacturing cost can be suppressed.
  • FIG. FIG. 6 is a side sectional view showing the main part of the superconducting electromagnet apparatus 1 according to Embodiment 2 of the present invention.
  • a cooling plate 15 is provided on one side surface in the direction of the axis 5 of each double pancake coil 13 with both side surfaces sandwiched between first and second insulating plates 14a and 14b and bonded to each other. It has been.
  • the second single pancake coil 11b is bonded to the first insulating plate 14a.
  • the radially outer end of the cooling plate 15 protrudes radially outward from the first and second insulating plates 14 a and 14 b and is thermally connected to the conductive cooling member 3.
  • Other configurations are the same as those of the superconducting electromagnet apparatus 1 of the first embodiment.
  • each double pancake coil 13 is efficiently cooled because the cold heat from the refrigerator 2 is conducted through the cooling plate 15.
  • the insulating plate 14b is also disposed outside the cooling plate 15, the insulating plate 14b may be omitted.
  • each double pancake coil 13 is thermally connected to the conductive cooling member 3 via a pair of cooling plates 15, respectively.
  • the double pancake coil 13 is efficiently cooled.
  • FIG. FIG. 8 is a front view showing the coil body 4 of the superconducting electromagnet apparatus 1 according to Embodiment 3 of the present invention.
  • a double pancake coil positioning member 22 is also arranged on the outer diameter side.
  • Each first single pancake coil 11a and each second single pancake coil 11b of this embodiment have the same inner diameter and outer diameter.
  • the insulating spacer 12, which is a component of the coil body 4 has an inner diameter that is smaller than the outer diameter of the first and second single pancake coils 11 a and 11 b, and the first is formed at the inner diameter side end portion over the entire circumference.
  • the insulating spacer 12 has an outer diameter that is larger than the outer diameter of the first and second single pancake coils 11a and 11b, and the first and second single spacers are formed on the outer diameter side end portions over the entire circumference. It has the protrusion part 12b which protruded in the diameter outward direction from the internal peripheral surface of the pancake coils 11a and 11b.
  • the double pancake coil positioning member 22 having a bowl-shaped cross section is formed with grooves extending in the circumferential direction at equal intervals along the axis 5 on the inner peripheral surface.
  • Each double pancake coil 13 is positioned and fixed by a double pancake coil positioning member 22 by fitting this groove into the protruding portion 12 b of the insulating spacer 12. The depth of the groove is larger than the height of the protrusion 12b.
  • the outer diameters of the first and second single pancake coils 11a and 11b are necessarily the same.
  • Other configurations are the same as those of the superconducting electromagnet apparatus 1 of the first embodiment.
  • the double pancake coil positioning members 21 and 22 are arranged on both the inner diameter side and the outer diameter side of the coil body 4, so that Compared with each other, the displacement of the axis 5 and the radial direction of each double pancake coil 13 can be prevented more reliably, and the deterioration of the magnetic field uniformity of the imaging space of the magnet internal space 7 can be further prevented.
  • the cooling plate 15 and the insulating plates 14a and 14b described in the second embodiment are arranged on one side or both sides of the side surface in the direction of the axis 5 of the double pancake coil 13. You may arrange in.
  • FIG. 9 is a front view showing the coil body 4 of the superconducting electromagnet apparatus 1 according to Embodiment 4 of the present invention
  • FIG. 10 is a cross-sectional view taken along line XX in FIG.
  • the radial dimensions of the first single pancake coil 11a and the second single pancake coil 11b, which are components of the double pancake coil 13 are different.
  • the first and second single pancake coils 11a and 11b facing each other in the adjacent double pancake coil 13 have the same radial dimension.
  • the hollow disc-shaped insulating space 12 which is a component of the double pancake coil 13
  • a protruding portion 12a protruding inward from the inner diameter surface of the first and second single pancake coils 11a, 11b. is doing.
  • a cutout portion 12c is formed in a part of the protruding portion 12a of the insulating spacer 12 so as to be flush with the inner diameter surfaces of the first and second single pancake coils 11a and 11b.
  • the first single pancake coil 11a and the second single pancake coil 11b facing each other through the insulating spacer 12 are electrically connected by a first connecting wire 23a at a notch 12c.
  • the adjacent double pancake coil 13 has the same radial dimension, the first single pancake coil 11 a and the second single pancake coil 11 b being the second outer diameter surface of the double pancake coil 13. It is electrically connected by the connecting wire 23b.
  • the first and second connection wires 23a and 23b are preferably superconducting wires, but may be non-superconducting wires such as copper wires. Other configurations are the same as those of the superconducting electromagnet apparatus 1 of the first embodiment.
  • the superconducting electromagnet apparatus 1 of the fourth embodiment even when the radial dimensions of the first single pancake coil 11a and the second single pancake coil 11b which are constituent elements of the double pancake coil 13 are different. Since the first connecting member 23a can be connected at the notch 12c of the insulating spacer 12, the design freedom of the shape of the double pancake coil 13 is increased, and the imaging space of the magnet internal space 7 can be increased accordingly. The design of the magnetic field uniformity becomes easy, and the amount of superconducting wire used can be reduced.
  • the double pancake coil positioning members 21 and 22 are fixed to the coil body 4 with an adhesive, for example.
  • the double pancake coil positioning members 21 and 22 can also be used as jigs for stacking and assembling the double pancake coil 13.
  • the double pancake coil positioning members 21 and 22 are removed from the coil body 4.
  • 11 is a front view showing the coil body 4 with the double pancake coil positioning member 21 shown in FIG. 9 removed
  • FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. is there.
  • the double pancake coil positioning members 21 and 22 When used as a jig, the double pancake coil positioning members 21 and 22 are in surface contact with the coil body 4 and are fitted into the protrusions 12a and 12b of the insulating spacers 12 and extend in the circumferential direction. Since the plurality of grooves 21a are formed on the peripheral surface, at the time of stacking and assembling the plurality of double pancake coils 13, by using this double pancake coil positioning member, the position of each double pancake coil 13 is changed to the groove. It is determined at the position 21a.
  • the error in the position of the double pancake coils 13 when stacked can be reduced, thereby preventing the deviation of the current center 31 of the double pancake coils 13, and the magnetic field in the magnet internal space 7 can be reduced when the superconducting electromagnet apparatus 1 is manufactured.
  • the uniformity can be reduced, and the adjustment work of the spatial uniformity by shimming can be eliminated or the adjustment load can be reduced.
  • each double pancake coil 13 includes a hollow disk-shaped insulating spacer 12 and a hollow disk-shaped first provided on both sides in the direction of the axis 5 of the insulating spacer 12. 1 single pancake coil 11a and second single pancake coil 11b.
  • the insulating spacer 12, the first single pancake coil 11a, and the second single pancake coil 11b have the same axis 5 respectively.
  • each insulating spacer 12 has a protruding portion 12b that protrudes radially outward from the outer peripheral surface of the first single pancake coil 11a and the second single pancake coil 11b at the outer diameter side end.
  • the double pancake coil positioning member 22 is in surface contact with the outer peripheral surface of the coil body 4 and the protruding portions 12b of the insulating spacers 12. Fitting the, the plurality of grooves extending in the circumferential direction are formed on the inner peripheral surface.
  • the gap is not necessarily required.
  • an insulating plate is inserted into the gap and bonded.
  • a filler such as an epoxy agent may be inserted to fill the gap.
  • an insulating plate may be disposed on all side surfaces of the double pancake coil 13 in the direction of the axis 5 and the space between the adjacent insulating plates may be filled with a filler.
  • the number of double pancake coil positioning members 21 and 22 may be four or more.
  • the number of double pancake coil positioning members 21 and 22 may be one or two.
  • the inner diameters of the first single pancake coil and the second single pancake coil are the same, and the position of the double pancake coil is determined.
  • the outer peripheral surface of the member 21 has the same diameter in the entire direction in the direction of the axis 5, but this is an example.
  • a double pancake coil positioning member whose outer peripheral surface is in surface contact with this inner diameter surface is provided. Use it.
  • the double pancake coil positioning member 22 disposed on the outer diameter side of the coil body 4 is the same as the double pancake coil positioning member 21.
  • a double pancake coil positioning member whose inner peripheral surface is in surface contact with the outer peripheral surface may be used.

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  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

La présente invention concerne un dispositif à aimant supraconducteur qui est pourvu : d'une chambre à vide ; d'un corps à bobines logé dans cette chambre à vide et constitué par stratification d'une pluralité de bobines en double galette ; et d'un élément de positionnement de bobines en double galette disposé sur un côté circulaire intérieur du corps à bobines. Cet élément de positionnement de bobines en double galette comporte une pluralité de canaux s'étendant dans la direction circonférentielle formés sur sa surface périphérique extérieure à intervalles le long de la direction d'une ligne axiale des bobines, et une partie saillante d'un élément d'espacement isolant est ajustée dans chacun de ces canaux.
PCT/JP2015/064731 2014-12-09 2015-05-22 Élément de positionnement de bobines en double galette, procédé de fabrication de dispositif à aimant supraconducteur, et dispositif à aimant supraconducteur WO2016092882A1 (fr)

Priority Applications (1)

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JP2016563537A JP6239148B2 (ja) 2014-12-09 2015-05-22 ダブルパンケーキコイル位置出し部材、超電導電磁石装置の製造方法及び超電導電磁石装置

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JP2014248786 2014-12-09
JP2014-248786 2014-12-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101866985B1 (ko) * 2017-05-12 2018-07-19 한국표준과학연구원 유냉식 전자석
JP2019207916A (ja) * 2018-05-28 2019-12-05 住友電気工業株式会社 超電導コイル体および超電導機器
JP7142811B1 (ja) * 2022-03-08 2022-09-27 三菱電機株式会社 位置出し部材並びに超電導マグネット及び超電導マグネットの製造方法

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