JP2013065834A - Superconductive coil body and superconductive apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a superconductive coil body and a superconductive apparatus which reduce loss.SOLUTION: A superconductive coil body 10 includes: inner peripheral coil bodies 12a, 12b that are coil body parts around which a superconducting wire rod 15 is wound; and a first magnetic material 13 that is a magnetic circuit member. The magnetic circuit member is disposed so as to face a surface (a surface of an upper part of the inner peripheral coil body 12a) positioned at the end surface side that intersects with a main surface of the superconducting wire rod 15 in the coil body part (the inner peripheral coil bodies 12a, 12b) and is made of a magnetic material. The magnetic circuit member (the first magnetic material 13) includes a facing surface which faces the surface of the coil body part (the inner peripheral coil bodies 12a, 12b). In the magnetic circuit member (the first magnetic material 13), end parts of the facing surface protrude to the outer side relative to the surface (the surface facing the first magnetic material 13) of the coil body part (the inner peripheral coil bodies 12a, 12b) and form protruding parts.

Description

  The present invention relates to a superconducting coil body and a superconducting device, and more specifically to a superconducting coil body and a superconducting device including a magnetic circuit member constituting a magnetic circuit.

  2. Description of the Related Art Conventionally, a superconducting coil configured by winding a superconducting wire is known (see, for example, Japanese Patent Application Laid-Open No. 2011-091094 (Patent Document 1)). In a superconducting coil, when a magnetic field is generated by passing an electric current, if magnetic flux lines of the magnetic field penetrate the main surface of the superconducting wire, there is a problem that the electrical characteristics of the superconducting coil deteriorate. More specific description will be given below.

  When an AC magnetic field is generated by passing an AC current through the superconducting coil, so-called AC loss such as hysteresis loss, coupling loss, and eddy current loss occurs. The magnitude of this AC loss is determined by the magnitude of the magnetic flux density in the magnetic field, but at the same time, the magnitude of the loss (AC loss) varies depending on the direction of the magnetic flux line with respect to the superconducting coil (specifically, the main surface of the superconducting wire). . For example, in a region where the magnetic flux density is high to some extent, the magnetic flux in the direction perpendicular to the main surface of the superconducting wire constituting the superconducting coil causes a loss that is 10 times greater than the magnetic flux horizontal to the main surface. There is. Here, the main surface of the superconducting wire means a surface having a relatively large surface area among the surfaces constituting the side surface of the superconducting wire when the superconducting wire is a tape-like wire.

  In the above-mentioned Japanese Patent Application Laid-Open No. 2011-091094, the main surface of the superconducting wire constituting the superconducting coil is inclined with respect to the central axis of the winding of the superconducting wire so as to be along the direction in which the magnetic flux lines expected to be generated extend. It has been proposed to reduce the proportion of magnetic flux lines penetrating the main surface of the superconducting wire.

JP 2011-091094 A

  However, there are cases where the ratio of magnetic flux lines penetrating the main surface of the superconducting wire cannot be sufficiently reduced only by adjusting the direction of the main surface of the superconducting wire in the superconducting coil as described above.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a superconducting coil body and a superconducting device capable of reducing loss.

  A superconducting coil body according to the present invention includes a coil main body wound with a superconducting wire and a magnetic circuit member. A magnetic circuit member is arrange | positioned so that it may oppose the surface located in the end surface side which cross | intersects the main surface of a superconducting wire in a coil main-body part, and consists of a magnetic body. The magnetic circuit member includes a facing surface that faces the surface of the coil main body, and a side surface that extends in a direction that is continuous with the facing surface and intersects the facing surface. The side surface is located at an end portion on the side close to the coil main body portion, and has a flat portion extending along the direction in which the main surface of the superconducting wire extends.

  In this case, the coil body portion and the magnetic circuit member constitute a part of the magnetic circuit, and the side surface of the magnetic circuit member has a flat portion closer to the coil body portion. In the region facing the facing surface of the circuit member, the direction of the magnetic flux lines extending from the magnetic circuit member to the coil body can be efficiently defined in a direction along the main surface of the superconducting wire of the coil body. That is, by arranging a magnetic circuit member made of a magnetic material on the end face side intersecting with the main surface of the superconducting wire of the coil main body, the magnetic flux can go around the center of the current flowing through the coil main body. The coil body and the magnetic circuit member are arranged so as to be able to do so. As a result, the direction of the magnetic flux generated by the current flowing in the coil main body can be induced in the direction along the main surface of the superconducting wire as described above. For this reason, the ratio of the magnetic flux line extended so that the main surface of a superconducting wire may be penetrated in a coil main-body part can be reduced effectively. Therefore, generation | occurrence | production of the loss in a superconducting coil resulting from presence of the magnetic flux line which penetrates the main surface of a superconducting wire can be suppressed.

  A superconducting device according to the present invention includes the superconducting coil body. In this case, a highly efficient superconducting device in which loss in the superconducting coil body is suppressed can be realized.

  According to this invention, generation | occurrence | production of the loss in a superconducting coil body can be suppressed effectively.

It is a cross-sectional schematic diagram which shows Embodiment 1 of the superconducting motor by this invention. It is a cross-sectional schematic diagram which shows the cooling container in which the superconducting coil body which comprises the superconducting motor shown in FIG. 1 was stored. FIG. 3 is a partial cross-sectional schematic diagram of the superconducting coil body shown in FIG. 2. FIG. 4 is a partial enlarged cross-sectional schematic view of the superconducting coil body shown in FIG. 3. It is a partial cross section schematic diagram of the superconducting coil body which comprises Embodiment 2 of the superconducting motor by this invention. It is a partial cross section schematic diagram of the superconducting coil body which comprises Embodiment 3 of the superconducting motor by this invention. It is a partial cross section schematic diagram of the superconducting coil body which comprises Embodiment 4 of the superconducting motor by this invention. It is a cross-sectional schematic diagram which shows Embodiment 5 of the superconducting motor by this invention. It is a cross-sectional schematic diagram which shows the cooling container in which the superconducting coil body which comprises the superconducting motor shown in FIG. 8 was stored. FIG. 10 is a schematic partial sectional view of the superconducting coil body shown in FIG. 9. It is a partial expanded cross-section schematic diagram of the superconducting coil body shown in FIG. FIG. 12 is a partial enlarged cross-sectional schematic diagram showing a modification of the superconducting coil body shown in FIG. 11. It is a partial cross section schematic diagram of the superconducting coil body which comprises Embodiment 6 of the superconducting motor by this invention. It is a partial cross section schematic diagram of the superconducting coil body which comprises Embodiment 7 of the superconducting motor by this invention. It is a partial cross section schematic diagram of the superconducting coil body which comprises Embodiment 8 of the superconducting motor by this invention. It is a schematic plan view of a superconducting coil body constituting Embodiment 9 of a superconducting motor according to the present invention. FIG. 17 is a partial cross-sectional schematic diagram of the superconducting coil body shown in FIG. 16. It is a perspective schematic diagram of the superconducting coil body which comprises Embodiment 10 of the superconducting motor by this invention. FIG. 19 is an exploded schematic view of the superconducting coil body shown in FIG. 18. FIG. 19 is a partial enlarged schematic view of the superconducting coil body shown in FIG. 18. FIG. 19 is a partial enlarged schematic view of the superconducting coil body shown in FIG. 18. It is a plane schematic diagram of the superconducting coil body constituting Embodiment 11 of the superconducting motor according to the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
A superconducting motor according to the present invention will be described with reference to FIGS.

  1 and 2, a superconducting motor 100 according to the present invention includes a rotor that is a rotor and a stator that is a stator arranged around the rotor. The rotor includes a rotation shaft 118 extending in a major axis direction perpendicular to the paper surface of FIG. 1, a rotor shaft 116 connected to the rotation shaft 118 and disposed around the rotation shaft 118, and an outer surface of the rotor shaft 116. And four permanent magnets 120 arranged at equal intervals. The outer surface of the rotor shaft 116 has an arc shape in cross section. The permanent magnets 120 arranged at equal intervals in the circumferential direction of the outer surface of the rotor shaft 116 have a quadrangular cross-sectional shape. The permanent magnet 120 is arranged so as to extend along the extending direction of the rotating shaft 118 in a direction perpendicular to the paper surface of FIG. As the permanent magnet 120, for example, a neodymium magnet, a samarium magnet, a ferrite magnet, or the like can be used.

  A stator as a stator of the superconducting motor 100 is disposed around the rotor as shown in FIG. The stator includes a stator yoke 121, a stator core 123 formed so as to protrude from the inner peripheral side of the stator yoke 121 toward the rotor, a superconducting coil body 10 disposed so as to surround the outer periphery of the stator core 123, And a cooling container 107 that holds the superconducting coil body therein.

  The stator yoke 121 is disposed so as to surround the outer periphery of the rotor shaft 116. The inner surface of the stator yoke 121 has an arcuate cross-sectional shape (a cross-sectional shape in a plane perpendicular to the extending direction of the rotating shaft 118). Superconducting coil body 10 is arranged along the arcuate inner surface of stator yoke 121. The cooling container 107 has an opening in a region located at the center of the superconducting coil body 10 so that a part of the stator core 123 can be inserted. That is, the superconducting coil body 10 is disposed so as to surround the outer periphery of the stator core 123.

  The cooling container 107 includes a cooling container inner tank 105 that holds the refrigerant 117 and the superconducting coil body 10 therein, and a cooling container outer tank 106 that is disposed so as to surround the outer periphery of the cooling container inner tank 105. A gap is provided between the cooling vessel outer tub 106 and the cooling vessel inner tub 105, and the inside of the gap is substantially in a vacuum state. That is, the cooling container 107 is a heat insulating container.

  As shown in FIGS. 1 to 3, the superconducting coil body 10 includes inner peripheral coil bodies 12 a and 12 b that surround the outer periphery of the stator core 123, and an outer periphery that is disposed so as to surround the outer peripheral side of the inner peripheral coil bodies 12 a and 12 b. The first magnetic body 13 arranged to connect the coil bodies 11a and 11b, the upper end face of the inner peripheral coil body 12a, and the upper end face of the outer peripheral coil body 11a, and the lower end face of the inner peripheral coil body 12b 2nd magnetic body 14 arrange | positioned so that between the lower end surfaces of the outer periphery coil body 11b may be included. The inner peripheral coil bodies 12a and 12b and the outer peripheral coil bodies 11a and 11b are formed so as to surround the central axis 16 shown in FIG. The superconducting coil body 10 is formed so that the surfaces of the inner peripheral coil bodies 12a and 12b and the outer peripheral coil bodies 11a and 11b are inclined at a predetermined angle (for example, 20 °) with respect to the central axis 16. From another point of view, the longitudinal axis 131 of the superconducting coil body 10 in the cross section shown in FIG. 2 is arranged so as to be inclined at a predetermined angle (for example, 20 °) with respect to the central axis 130 of the stator core. . The inner peripheral coil bodies 12a and 12b and the outer peripheral coil bodies 11a and 11b are each configured by winding a tape-shaped superconducting wire 15. The inner peripheral coil bodies 12a and 12b are laminated so that the end surfaces of the superconducting wire 15 (end surfaces connected to the main surface) face each other. Further, the outer peripheral coil bodies 11a and 11b are also laminated so that the end surfaces (end surfaces continuous with the main surface) of the superconducting wire 15 are opposed to each other. In addition, although the structure where two coils called the inner periphery coil bodies 12a and 12b are laminated | stacked is shown here, only one inner circumference coil body is arrange | positioned, or three or more inner circumference coil bodies are laminated and arranged. You may do it. In addition, only one inner peripheral coil body may be disposed for the outer peripheral coil bodies 11a and 11b, or three or more outer peripheral coil bodies may be stacked and disposed.

  As shown in FIGS. 2 and 3, the first magnetic body 13 and the second magnetic body 14 have a cross-sectional shape bent like a fan shape. Further, when the superconducting coil body 10 is viewed in plan (when the superconducting coil body 10 is viewed from the direction along the central axis 16), the first magnetic body 13 and the second magnetic body 14 surround the periphery of the stator core 123. It has a shape (annular shape). Further, as shown in FIG. 4, the outer peripheral coil body 11b and the second magnetic body 14 are connected and fixed by a bonding agent 29 such as an adhesive. Such a bonding agent 29 is also disposed at a connection portion between the outer peripheral coil body 11 a and the inner peripheral coil bodies 12 a and 12 b, the second magnetic body 14, and the first magnetic body 13.

  As shown in FIGS. 2 and 3, in the superconducting coil body 10 constituting the superconducting motor 100 according to the present invention, inner coil bodies 12a and 12b, outer coil bodies 11a and 11b, a first magnetic body 13 and a second magnetic body. The body 14 constitutes a magnetic circuit. Further, as shown in FIG. 4, in the second magnetic body 14, the end portion of the end surface facing the outer coil body 11 b protrudes outward from the surface facing the second magnetic body 14 in the outer coil body 11 b. And the convex part 19 containing the edge part which protruded in this way opposes the inner periphery coil bodies 12a and 12b and the outer periphery coil bodies 11a and 11b in the 1st magnetic body 13 and the 2nd magnetic body 14, as shown in FIG. It is formed in each area to be. For this reason, especially in the boundary part of inner peripheral coil body 12a, 12b and outer peripheral coil body 11a, 11b, the 1st magnetic body 13, and the 2nd magnetic body 14, the surrounding magnetic flux line is changed from the convex part 19 to the 1st magnetic body 13. And it can be pulled into the second magnetic body 14. That is, generation of magnetic flux lines that penetrate the main surfaces 15a and 15b of the superconducting wire 15 at the boundary portion can be suppressed. For this reason, the loss in the superconducting coil body 10 is increased due to the generation of magnetic flux lines so as to penetrate the main surfaces 15a and 15b of the superconducting wire 15, and as a result, the performance of the superconducting coil body 10 deteriorates. The occurrence of such problems can be suppressed.

  As shown in FIGS. 3 and 4, in the first magnetic body 13 and the second magnetic body 14, the side surface 14 a that is continuous with the end surface facing either the inner peripheral coil bodies 12 a, 12 b or the outer peripheral coil bodies 11 a, 11 b. At the end portion, a surface portion 37 inclined with respect to the direction in which the main surfaces 15a and 15b of the superconducting wire 15 extend is formed. The surface portion 37 may be a flat surface or may have a curved shape as shown in FIG.

(Embodiment 2)
A second embodiment of the superconducting motor according to the present invention will be described with reference to FIG. FIG. 5 corresponds to FIG.

  The superconducting motor according to the second embodiment of the present invention basically has the same structure as the superconducting motor shown in FIGS. 1 to 4, but the structure of the superconducting coil body 10 is different. Specifically, as shown in FIG. 5, in the second embodiment of the superconducting motor according to the present invention, the first magnetic body 13 is composed of two separated magnetic bodies 23a and 23b. The magnetic body 23a is connected to the inner peripheral coil body 12a. The magnetic body 23b is connected to the outer peripheral coil body 11a. A gap 28 is formed between the magnetic body 23a and the magnetic body 23b. The second magnetic body 14 which is the other magnetic body is also composed of two magnetic bodies 24a and 24b. The magnetic body 24a is connected to the inner peripheral coil body 12a. The magnetic body 24b is connected to the outer coil body 11b. A gap 28 is formed between the magnetic body 24a and the magnetic body 24b. The width of the gap 28 is sufficiently narrow, for example, 0.1 mm or more and 5 mm or less.

  Also with the first magnetic body 13 and the second magnetic body 14 configured as described above, the width of the gap 28 is sufficiently narrow, so that a magnetic circuit can be configured in the superconducting coil body 10. The same effect as that of the superconducting coil body 10 shown in FIGS. 1 to 4 can be obtained by the superconducting coil body 10 shown in FIG.

  Depending on the device configuration of the superconducting motor 100, only one of the first magnetic body 13 and the second magnetic body 14 is disposed, or at least one of the magnetic bodies 23a, 23b, 24a, 24b shown in FIG. It is good also as a structure which arrange | positions any one.

(Embodiment 3)
A third embodiment of the superconducting motor according to the present invention will be described with reference to FIG. FIG. 6 corresponds to FIG.

  The superconducting motor provided with the superconducting coil body 10 shown in FIG. 6 basically has the same structure as the superconducting motor 100 shown in FIGS. 1 to 4, but the shape of the superconducting coil body 10 is different. That is, in the superconducting coil body 10 shown in FIG. 6, as with the superconducting coil body 10 shown in FIGS. 1 to 4, the inner peripheral coil bodies 12 a, 12 b and The directions of the main surfaces of the superconducting wires 15 constituting the outer coil bodies 11a and 11b intersect each other. On the other hand, the end surfaces of the inner coil bodies 12a and 12b and the outer coil bodies 11a and 11b facing the first magnetic body 13 and the second magnetic body 14 are substantially perpendicular to the central axis 16 of the superconducting coil body 10. ing. Also with superconducting coil body 10 having such a configuration, it is possible to obtain the same effect as that of superconducting coil body 10 in the first embodiment described above.

(Embodiment 4)
A fourth embodiment of the superconducting motor according to the present invention will be described with reference to FIG. FIG. 7 corresponds to FIG.

  Embodiment 4 of the superconducting motor according to the present invention has the same configuration as that of superconducting motor 100 shown in FIGS. 1 to 4, but the structure of superconducting coil body 10 is different. That is, in the fourth embodiment of the superconducting motor according to the present invention, the superconducting coil body 10 is composed of the coil bodies 21a and 21b and one magnetic body 23 connected to the coil bodies 21a and 21b. The coil bodies 21a and 21b basically have the same structure as the inner peripheral coil bodies 12a and 12b or the outer peripheral coil bodies 11a and 11b shown in FIG. The magnetic body 23 has a C-shaped cross section as shown in FIG. 7, one end is connected to the upper end surface of the coil body 21a, and the other end is the lower end of the coil body 21b. Connected to the department. At both end portions of the magnetic body 23 described above, convex portions whose outer peripheral side surfaces protrude outward from the surfaces of the coil bodies 21a and 21b are formed. The surface portion 37 that is the outer peripheral side surface of the convex portion may be a curved surface as illustrated, or may be a flat surface. In the superconducting coil body 10 having such a cross-sectional shape, the coil bodies 21a and 21b and the magnetic body 23 constitute a magnetic circuit.

  Also with the superconducting coil body 10 having such a configuration, the same effect as that of the superconducting coil body 10 shown in FIG. 3 and the like can be obtained.

(Embodiment 5)
A superconducting motor according to the present invention will be described with reference to FIGS.

  Referring to FIGS. 8 and 9, superconducting motor 100 according to the present invention basically has the same structure as superconducting motor 100 shown in FIGS. 1 and 2. That is, superconducting motor 100 includes a rotor that is a rotor and a stator that is a stator disposed around the rotor. However, the configuration of the superconducting coil body 10 constituting the stator is different from the superconducting motor 100 shown in FIGS. 1 and 2. Hereinafter, superconducting coil body 10 in the present embodiment will be described with reference to FIGS. 9 to 11.

  As shown in FIGS. 9 to 11, the superconducting coil body 10 includes inner peripheral coil bodies 12 a and 12 b that surround the outer periphery of the stator core 123 and an outer periphery that is disposed so as to surround the outer peripheral side of the inner peripheral coil bodies 12 a and 12 b. The first magnetic body 13 arranged to connect the coil bodies 11a and 11b, the upper end face of the inner peripheral coil body 12a, and the upper end face of the outer peripheral coil body 11a, and the lower end face of the inner peripheral coil body 12b 2nd magnetic body 14 arrange | positioned so that between the lower end surfaces of the outer periphery coil body 11b may be included. In the superconducting coil body 10 shown in FIGS. 9 to 11, the shapes of the first magnetic body 13 and the second magnetic body 14 are different from those of the superconducting coil body 10 shown in FIGS.

  That is, as shown in FIG. 11, in the second magnetic body 14, the end of the side surface 14 a continuous with the end face facing the outer peripheral coil body 11 b is substantially in the extending direction of the main surfaces 15 a and 15 b of the superconducting wire 15. A flat portion 17 extending in parallel is formed. As shown in FIG. 10, the plane portion 17 is formed on the side surfaces of the first magnetic body 13 and the second magnetic body 14 in regions facing the inner peripheral coil bodies 12a and 12b and the outer peripheral coil bodies 11a and 11b, respectively. . Therefore, the main surfaces 15a and 15b of the superconducting wire 15 (see FIG. 11) particularly at the boundaries between the inner and outer coil bodies 12a and 12b and the outer coil bodies 11a and 11b and the first magnetic body 13 and the second magnetic body 14. The magnetic lines of force can extend substantially parallel to. That is, generation of magnetic flux lines that penetrate the main surfaces 15a and 15b of the superconducting wire 15 at the boundary portion can be suppressed. For this reason, the loss in the superconducting coil body 10 is increased due to the generation of magnetic flux lines so as to penetrate the main surfaces 15a and 15b of the superconducting wire 15, and as a result, the performance of the superconducting coil body 10 deteriorates. The occurrence of such problems can be suppressed.

  Further, as shown in FIG. 11, since the width of the second magnetic body 14 is wider than the width of the outer coil body 11b, it is outside the main surfaces 15a, 15b of the superconducting wire 15 constituting the outer coil body 11b. The second magnetic body 14 is formed with a protruding portion 19 protruding in the direction. By forming such a convex portion 19 in the second magnetic body 14, the magnetic flux lines existing around the outer peripheral coil body 11 b are transferred to the convex portion as in the superconducting coil body 10 shown in FIGS. 2 to 4. 19 to the inside of the second magnetic body 14. As a result, the possibility that the magnetic flux lines penetrate the main surfaces 15a and 15b of the superconducting wire 15 constituting the outer peripheral coil body 11b can be more reliably reduced.

  In addition, as shown in FIG. 12, you may make the width | variety of the 2nd magnetic body 14 substantially the same as the width | variety of the outer periphery coil body 11b. Further, in the second magnetic body 14, the end of the side surface 14 a continuous with the end face facing the outer peripheral coil body 11 b is located substantially on the same plane as the main surfaces 15 a and 15 b of the superconducting wire 15 (substantially A flat surface portion 17 is formed which extends parallel to the main surfaces 15a and 15b. The plane portion 17 is formed on the side surfaces of the first magnetic body 13 and the second magnetic body 14 in regions facing the inner peripheral coil bodies 12a and 12b and the outer peripheral coil bodies 11a and 11b, respectively. For this reason, superconductivity is similar to that of the superconducting coil body 10 shown in FIG. 11, particularly at the boundary between the inner and outer coil bodies 12a and 12b and the outer coil bodies 11a and 11b and the first magnetic body 13 and the second magnetic body 14. The magnetic lines of force can extend substantially parallel to the main surfaces 15a and 15b (see FIG. 12) of the wire 15. That is, generation of magnetic flux lines that penetrate the main surfaces 15a and 15b of the superconducting wire 15 at the boundary portion can be suppressed.

(Embodiment 6)
A sixth embodiment of a superconducting motor according to the present invention will be described with reference to FIG. FIG. 13 corresponds to FIG.

  Embodiment 6 of the superconducting motor according to the present invention basically has the same structure as the superconducting motor shown in FIGS. 8 to 11, but the structure of the superconducting coil body 10 is different. Specifically, as shown in FIG. 13, in the sixth embodiment of the superconducting motor according to the present invention, the first magnetic body 13 is composed of two separated magnetic bodies 23a and 23b. The magnetic body 23a is connected to the inner peripheral coil body 12a. The magnetic body 23b is connected to the outer peripheral coil body 11a. A gap 28 is formed between the magnetic body 23a and the magnetic body 23b. The second magnetic body 14 which is the other magnetic body is also composed of two magnetic bodies 24a and 24b. The magnetic body 24a is connected to the inner peripheral coil body 12a. The magnetic body 24b is connected to the outer coil body 11b. A gap 28 is formed between the magnetic body 24a and the magnetic body 24b. The width of the gap 28 is sufficiently narrow, for example, 0.1 mm or more and 5 mm or less.

  Also with the first magnetic body 13 and the second magnetic body 14 configured as described above, the width of the gap 28 is sufficiently narrow, so that a magnetic circuit can be configured in the superconducting coil body 10. The same effects as those of the superconducting coil body 10 shown in FIGS. 8 to 11 can be obtained by the superconducting coil body 10 shown in FIG.

  Depending on the device configuration of the superconducting motor 100, only one of the first magnetic body 13 and the second magnetic body 14 is disposed, as shown in FIG. 13, similarly to the superconducting coil body 10 shown in FIG. A configuration may be adopted in which at least one of the magnetic bodies 23a, 23b, 24a, and 24b is disposed.

(Embodiment 7)
A seventh embodiment of the superconducting motor according to the present invention will be described with reference to FIG. FIG. 14 corresponds to FIG.

  The superconducting motor provided with the superconducting coil body 10 shown in FIG. 14 basically has the same structure as the superconducting motor 100 shown in FIGS. 8 to 11, but the shape of the superconducting coil body 10 is different. That is, in the superconducting coil body 10 shown in FIG. 14, as with the superconducting coil body 10 shown in FIGS. 8 to 11, the inner peripheral coil bodies 12 a, 12 b and It arrange | positions so that the direction of the main surface of the superconducting wire 15 which comprises the outer periphery coil bodies 11a and 11b may cross | intersect. On the other hand, the end surfaces of the inner coil bodies 12a and 12b and the outer coil bodies 11a and 11b facing the first magnetic body 13 and the second magnetic body 14 are substantially perpendicular to the central axis 16 of the superconducting coil body 10. ing. Also with superconducting coil body 10 having such a configuration, it is possible to obtain the same effect as that of superconducting coil body 10 in the fifth embodiment described above.

(Embodiment 8)
With reference to FIG. 15, Embodiment 8 of the superconducting motor according to the present invention will be described. FIG. 15 corresponds to FIG.

  Embodiment 8 of the superconducting motor according to the present invention has the same configuration as that of superconducting motor 100 shown in FIGS. 8 to 11, but the structure of superconducting coil body 10 is different. In other words, in the eighth embodiment of the superconducting motor according to the present invention, the superconducting coil body 10 is composed of coil bodies 21a and 21b and one magnetic body 23 connected to the coil bodies 21a and 21b. The coil bodies 21a and 21b basically have the same structure as the inner circumference coil bodies 12a and 12b or the outer circumference coil bodies 11a and 11b shown in FIG. The magnetic body 23 has a C-shaped cross section as shown in FIG. 15, one end is connected to the upper end surface of the coil body 21a, and the other end is the lower end of the coil body 21b. Connected to the department. At both end portions of the magnetic body 23 described above, the outer peripheral side surfaces are flat portions 17 that extend in substantially the same direction as the direction in which the main surface of the superconducting wire 15 constituting the coil bodies 21a and 21b extends. In the superconducting coil body 10 having such a cross-sectional shape, the coil bodies 21a and 21b and the magnetic body 23 constitute a magnetic circuit.

  Also with the superconducting coil body 10 having such a configuration, the same effects as those of the superconducting coil body 10 shown in FIG. 10 and the like can be obtained.

(Embodiment 9)
A ninth embodiment of the superconducting motor according to the present invention will be described with reference to FIGS. FIG. 17 is a schematic cross-sectional view taken along line XVII-XVII in FIG. Moreover, the cross-sectional shape of the superconducting coil body in line segment III-III in FIG. 16 is the same as the cross-sectional shape of the superconducting coil body shown in FIG.

  Embodiment 9 of the superconducting motor according to the present invention basically has the same structure as the superconducting motor shown in FIGS. 1 to 4, but the structure of the superconducting coil body 10 is different. Specifically, as shown in FIGS. 16 and 17, in the ninth embodiment of the superconducting motor according to the present invention, the outer peripheral coil body 11a having an annular (for example, racetrack type or saddle type) planar shape and the inner The 1st magnetic body 13 arrange | positioned so that between the upper end surfaces of the surrounding coil body 12a may be formed by joining a some structural member. Although not shown in FIG. 16, the outer peripheral coil body 11 b and the inner peripheral coil body 12 a that are stacked with the outer peripheral coil body 11 a and the inner peripheral coil body 12 b that is stacked with the outer peripheral coil body 12 a (see FIG. 17). The second magnetic body is arranged so as to connect the lower end faces of the two.

  The first magnetic body 13 shown in FIG. 16 has a structure in which constituent members 13 a and 13 b having a bent shape and constituent members 13 c and 13 d extending in a substantially linear shape are joined at a joint portion 51. Each of the constituent members 13a to 13d is made of a magnetic material, and can be formed using an arbitrary magnetic material, like the first magnetic material 13 in each of the above-described embodiments.

  For example, regarding the constituent members 13a and 13b having bent shapes, the constituent members 13a and 13b having complicated shapes can be easily formed by using a soft magnetic material such as ferrite. Moreover, in the 1st magnetic body 13, you may change a constituent material in consideration of use conditions etc. about each of the structural members 13a-13d.

  Also, the second magnetic body not shown in FIG. 16 basically has the same structure as the first magnetic body 13 described above. That is, the second magnetic body includes two constituent members having a bent shape (the constituent member 14b in FIG. 17 and the constituent member 14b having substantially the same structure) and the constituent members 13c and 13d extending substantially linearly. Are joined at the joint.

  As shown in FIG. 17, in the bent portion of the superconducting coil body 10, the position of the inner peripheral coil body 12 b farther from the central axis 16 than the inner peripheral coil body 12 a with respect to the central axis 16 of the superconducting coil body 10. Is arranged. Further, the outer peripheral coil bodies 11 a and 11 b are also arranged at positions where the other outer peripheral coil body 11 b is separated from the central axis 16 than the outer peripheral coil body 11 a. Further, as can be seen from FIGS. 3 and 17, the inclination direction of the inner peripheral surface of the inner peripheral coil bodies 12 a and 12 b (the main surface of the superconducting wire 15) in the linear portion of the superconducting coil body 10 with respect to the central axis 16 is The linear portion of the superconducting coil body 10 shown in FIG. 3 and the bent portion of the superconducting coil body shown in FIG. 17 are in opposite directions.

  Also with the superconducting coil body 10 having such a configuration, the same effects as those of the superconducting coil body 10 shown in FIGS. 1 to 4 can be obtained. Furthermore, since at least one of the first magnetic body 13 and the second magnetic body is configured by joining a plurality of constituent members 13a to 13d as shown in FIG. 16, the use conditions of the superconducting coil body 10 The material of each of the plurality of constituent members 13a to 13d can be appropriately selected in consideration of the above. Therefore, the degree of freedom in designing the characteristics of the superconducting coil body 10 can be increased. Furthermore, regarding the constituent members 13a to 13d here, the material, the manufacturing method, and the like can be appropriately selected according to the respective shapes and the like, so that the superconducting coil body 10 can be easily manufactured.

(Embodiment 10)
A tenth embodiment of a superconducting motor according to the present invention will be described with reference to FIGS. 20 is a partially enlarged schematic view showing a bent portion of the superconducting coil body 10 shown in FIG. 18, and FIG. 21 is a schematic view showing a cross section of the bent portion of the superconducting coil body 10 shown in FIG. Yes.

  Embodiment 10 of the superconducting motor according to the present invention basically has the same structure as that of the superconducting motor using the superconducting coil body 10 shown in FIGS. 16 and 17, but the structure of the superconducting coil body 10 is different. Yes. Specifically, as shown in FIGS. 18 to 21, in the superconducting motor according to the tenth embodiment of the present invention, the superconducting coil body 10 has a so-called saddle shape, and further, the first magnetic body. 13 is constituted by two separated magnetic bodies 23a and 23b. The magnetic body 23 a is connected to the inner peripheral coil body 12. The magnetic body 23 b is connected to the outer coil body 11. A gap is formed between the magnetic body 23a and the magnetic body 23b.

  The second magnetic body 14 which is the other magnetic body is also composed of two magnetic bodies 24a and 24b. The magnetic body 24 a is connected to the inner peripheral coil body 12. The magnetic body 24 b is connected to the outer coil body 11. A gap is formed between the magnetic body 24a and the magnetic body 24b. The width of this gap is sufficiently narrow, and may be, for example, 0.1 mm or more and 5 mm or less, similarly to the superconducting coil body 10 shown in FIG.

  Each of the magnetic bodies 23 a, 23 b, 24 a, and 24 b described above is formed by joining a plurality of constituent members at the joint portion 51, similarly to the first magnetic body 13 of the superconducting coil body 10 shown in FIG. 16. . Further, the outer peripheral coil body 11 and the inner peripheral coil body 12 shown in FIGS. 18 to 21 may be configured by laminating superconducting wires, respectively, and the superconducting coil body 10 shown in FIGS. 1 to 3. As described above, a laminated coil in which a plurality of coil bodies each wound with a superconducting wire is laminated may be used.

  Since the gap between the magnetic bodies 23a and 23b and the gap between the magnetic bodies 24a and 24b are sufficiently narrow, the first magnetic body 13 and the second magnetic body 14 can constitute a magnetic circuit. Therefore, the superconducting coil body 10 shown in FIGS. 18 to 21 can obtain the same effects as those of the superconducting coil body 10 shown in FIGS. 16 and 17.

(Embodiment 11)
With reference to FIG. 22, Embodiment 11 of the superconducting motor according to the present invention will be described. FIG. 22 corresponds to FIG.

  Embodiment 11 of the superconducting motor according to the present invention basically has the same structure as that of the superconducting motor using the superconducting coil body 10 shown in FIGS. 16 and 17, but the structure of the superconducting coil body 10 is different. Yes. Specifically, as shown in FIG. 22, in the eleventh embodiment of the superconducting motor according to the present invention, the first magnetic body 13 (and the second magnetic body (not shown)) of the superconducting coil body 10 includes a plurality of constituent members. Are integrally formed as one member.

  Also with the superconducting coil body 10 having such a configuration, the same effects as those of the superconducting coil body 10 shown in FIGS. 1 to 4 can be obtained. Further, by configuring the first magnetic body 13 as a single member in this way, the magnetic or electrical characteristics of the first magnetic body 13 change locally (for example, a part having a different structure from the surrounding, such as a joint) Occurrence of such a problem that the characteristic changes locally).

  As the first magnetic body 13 (or the second magnetic body), for example, a sintered body obtained by molding and sintering a magnetic powder can be used. In addition, as the first magnetic body 13 (or the second magnetic body), it is possible to use a composite (a composite in which the magnetic powder is dispersed in the resin) obtained by mixing and solidifying a magnetic powder in a resin. . When a soft ferrite material is used as the material of the first magnetic body or the second magnetic body described above, it is desirable to use a material having a relatively high saturation magnetic flux density and a small loss during driving. For example, Hitachi Metals MB28D, ML33D, etc. are available. Sintered materials may be used as these materials, or materials formed by kneading with resin may be used.

  Further, a laminated body in which a plurality of plate-like magnetic bodies (for example, electromagnetic steel plates) pressed into a predetermined shape are stacked and fixed can also be used as the first magnetic body 13 (or the second magnetic body). Moreover, as the material constituting the first magnetic body 13 and the second magnetic body 14 in the above-described first to tenth embodiments of the present invention, the above-described sintered body, composite, or laminated body can be used.

  Here, although there is a part which overlaps with embodiment mentioned above, the characteristic structure of this invention is enumerated.

  A superconducting coil body 10 according to the present invention includes a coil main body (inner coil bodies 12a and 12b, coil bodies 21a and 21b) around which a superconducting wire 15 is wound, and a magnetic circuit member (first magnetic body 13 and magnetic body). 23). The magnetic circuit members (the first magnetic body 13 and the magnetic body 23) are located on the end face side intersecting with the main surface of the superconducting wire 15 in the coil main body (inner peripheral coil bodies 12a and 12b, coil bodies 21a and 21b). It arrange | positions so that it may oppose the surface (The surface which opposes the 1st magnetic body 13 or the magnetic body 23, for example, the upper surface of the inner peripheral coil body 12a), and consists of a magnetic body. The magnetic circuit member (first magnetic body 13, magnetic body 23) includes a facing surface that faces the surface of the coil main body (inner peripheral coil bodies 12a, 12b, coil bodies 21a, 21b). In the magnetic circuit member (the first magnetic body 13 and the magnetic body 23), the end of the opposing surface is the surface (the first magnetic body 13) of the coil main body (the inner peripheral coil bodies 12a and 12b and the coil bodies 21a and 21b). Alternatively, the convex portion 19 is configured to protrude outward from the surface facing the magnetic body 23.

  In this way, the magnetic flux lines generated around the superconducting coil body 10 can be guided to be drawn into the end portion of the opposing surface of the magnetic circuit member (the convex portion 19 protruding outward from the coil body portion). The possibility that the magnetic flux lines penetrate the main surfaces 15a and 15b of the superconducting wire 15 can be reduced. Therefore, it is possible to suppress occurrence of loss in superconducting coil body 10 due to the presence of magnetic flux lines penetrating main surfaces 15a and 15b of superconducting wire 15.

  In the superconducting coil body 10, the magnetic circuit member (the first magnetic body 13 and the magnetic body 23) includes a side surface that is continuous with the opposing surface and extends in a direction intersecting the opposing surface. As shown in FIGS. 1-7, the said side surface is located in the edge part near the coil main-body part (inner circumference coil bodies 12a and 12b, coil bodies 21a and 21b), and the main surface of the superconducting wire 15 extends. You may have the inclination part (surface part 37) inclined with respect to a direction. The width of the magnetic circuit member (the first magnetic body 13 and the magnetic body 23) in the inclined portion may increase as it approaches the coil main body (inner peripheral coil bodies 12a and 12b, coil bodies 21a and 21b). In this case, the magnetic flux lines can be more effectively drawn into the convex portion 19 including the surface portion 37.

  In the superconducting coil body 10, the magnetic circuit member (the first magnetic body 13 and the magnetic body 23) includes a side surface that is continuous with the opposing surface and extends in a direction intersecting the opposing surface. As shown in FIGS. 8-15, the said side surface is located in the edge part near the coil main-body part (inner circumference coil bodies 12a and 12b, coil bodies 21a and 21b), and the main surface of the superconducting wire 15 is extended. You may have the plane part 17 extended along a direction. In this case, in the region where the coil main body portion and the magnetic circuit member face each other, the direction of the magnetic flux lines extending from the first magnetic body 13 and the magnetic body 23 toward the inner peripheral coil bodies 12a and 12b or the coil bodies 21a and 21b is illustrated. 11 can be efficiently defined in the direction along the main surfaces 15a and 15b of the superconducting wire 15 as shown in FIG.

  In addition, the superconducting coil body 10 according to the present invention includes a coil main body (inner coil bodies 12a and 12b, coil bodies 21a and 21b) around which a superconducting wire 15 is wound, and a magnetic circuit member (first magnetic body 13, Magnetic body 23). The magnetic circuit members (the first magnetic body 13 and the magnetic body 23) are located on the end face side intersecting with the main surface of the superconducting wire 15 in the coil main body (inner peripheral coil bodies 12a and 12b, coil bodies 21a and 21b). It arrange | positions so that it may oppose the surface (The surface which opposes the 1st magnetic body 13 or the magnetic body 23, for example, the upper surface of the inner peripheral coil body 12a), and consists of a magnetic body. The magnetic circuit member (the first magnetic body 13 and the magnetic body 23) includes a facing surface facing the surface of the coil body (inner peripheral coil bodies 12a and 12b, coil bodies 21a and 21b), a facing surface connected to the facing surface, and And side surfaces extending in the intersecting direction. The side surface has a flat surface portion 17 that is located at an end portion on the side close to the coil main body (inner peripheral coil bodies 12a and 12b, coil bodies 21a and 21b) and extends along the direction in which the main surface of the superconducting wire 15 extends.

  In this case, the coil main body (inner peripheral coil bodies 12a and 12b, coil bodies 21a and 21b) and the magnetic circuit members (first magnetic body 13 and magnetic body 23) constitute a part of the magnetic circuit, and Since the side surface of the magnetic circuit member such as the magnetic body 13 or the magnetic body 23 has the flat portion 17 near the coil body portion, the first magnetic body 13 is formed in the region where the coil body portion and the magnetic circuit member face each other. The direction of the magnetic flux lines extending from the magnetic body 23 toward the inner peripheral coil bodies 12a and 12b or the coil bodies 21a and 21b is efficiently increased in the direction along the main surfaces 15a and 15b of the superconducting wire 15 as shown in FIG. Can be prescribed. For this reason, the ratio of the magnetic flux lines extending so as to penetrate the main surface of the superconducting wire 15 in the coil main body can be effectively reduced. Therefore, it is possible to suppress occurrence of loss in superconducting coil body 10 due to the presence of magnetic flux lines penetrating main surfaces 15a and 15b of superconducting wire 15. Note that the length of the flat portion 17 (the length in the direction in which the magnetic flux lines extend) can be, for example, 10% to 100% of the width of the superconducting wire 15.

  In the superconducting coil body 10, as shown in FIGS. 10, 11, 13 to 15, etc., in the magnetic circuit member (first magnetic body 13, magnetic body 23), the end portion of the opposing surface (inner coil body) 12a, 12b or the end of the surface facing the coil bodies 21a, 21b) may be a convex portion 19 protruding outward from the surface of the coil main body. The protruding height of the convex portion 19 from the surfaces of the inner peripheral coil bodies 12a and 12b may be, for example, 0.1 mm or more. In this case, the magnetic flux lines generated around the superconducting coil body 10 can be guided so as to be drawn into the end portion of the opposing surface of the magnetic circuit member (the convex portion 19 protruding outward from the coil main body portion). Can reduce the possibility of penetrating the main surfaces 15a, 15b of the superconducting wire 15. In addition, it is preferable to make the protrusion height of the protrusion 19 (for example, the height of the protrusion 19 in a direction perpendicular to the surface of the inner peripheral coil body 12a) as large as possible. Therefore, for example, the height of the convex portion 19 may be increased to a height at which the superconducting coil body 10 is in contact with the inner wall of the cooling container.

  In the superconducting coil body 10, the magnetic circuit member (first magnetic body 13) is composed of a plurality of magnetic body members (magnetic bodies 23 a and 23 b) arranged with a gap 28 therebetween as shown in FIGS. 5 and 13. It may be. If the gap 28 is sufficiently small, the degree of leakage of magnetic flux lines from the gap 28 is extremely small. Therefore, the magnetic circuit member (first magnetic body 13) and the coil main body (inner coil bodies 12a, 12b) It is possible to construct a magnetic circuit. Further, the gap 28 is disposed at a position away from the superconducting coil body 10, so that it passes through the superconducting coil body 10 and the first magnetic body 13 without affecting the direction of the magnetic flux lines near the superconducting coil body 10. The absolute value of the magnetic flux density can be reduced. That is, there is an effect of reducing loss.

  In the superconducting coil body 10, the coil body (inner coil bodies 12a, 12b, coil bodies 21a, 21b) is located on the opposite side of the surface (the upper surface of the inner coil body 12a, the upper surface of the coil body 21a). The other surface (the lower surface of the inner peripheral coil body 12b, the lower surface of the coil body 21b) is included. The superconducting coil body 10 may be disposed so as to face the other surface of the coil main body, and may include another magnetic circuit member (second magnetic body 14) made of a magnetic body.

  In this case, by configuring the coil main body portion to be sandwiched between the first magnetic body 13 and the second magnetic body 14, a magnetic circuit can be reliably configured with these members.

  In the superconducting coil body 10, the other magnetic circuit member (second magnetic body 14) is the other surface of the coil main body (inner coil bodies 12a, 12b, coil bodies 21a, 21b) (lower part of the inner coil body 12b). Other opposing surfaces that oppose the surface, the lower surface of the coil body 21b). In the other magnetic circuit member (second magnetic body 14), the end of the other facing surface is the other surface (inner coil body 12b) of the coil body (inner coil bodies 12a, 12b, coil bodies 21a, 21b). Or the lower surface of the coil body 21b). In this case, in the region where the lower surface of the inner peripheral coil body 12b or the lower surface of the coil body 21b and the second magnetic body 14 face each other, the magnetic flux lines protrude from the end portion of the other facing surface (outward from the coil body portion). The second magnetic body 14 can be guided to be drawn into the convex portion 19). For this reason, the possibility that the magnetic flux lines penetrate the main surfaces 15a and 15b of the superconducting wire 15 can be reduced.

  In the superconducting coil body 10, the other magnetic circuit member (second magnetic body 14) includes another side surface 14 a that continues to the other facing surface and extends in a direction intersecting with the other facing surface. The other side surface 14a is located at an end portion on the side close to the coil main body (inner peripheral coil bodies 12a, 12b, coil bodies 21a, 21b) and is inclined with respect to the direction in which the main surface of the superconducting wire 15 extends. (Surface portion 37) may be provided. In this case, the magnetic flux lines can be more effectively drawn into the convex portion 19 including the surface portion 37.

  In the superconducting coil body 10, the other magnetic circuit member (second magnetic body 14) includes another side surface 14 a that continues to the other facing surface and extends in a direction intersecting with the other facing surface. The other side surface 14a is located at an end portion on the side close to the coil main body (inner peripheral coil bodies 12a, 12b, coil bodies 21a, 21b) and extends along the direction in which the main surface of the superconducting wire 15 extends. You may have. In this case, in the region where the coil body portion and the second magnetic body 14 face each other, the direction of the magnetic flux lines extending from the second magnetic body 14 toward the inner peripheral coil bodies 12a and 12b or the coil bodies 21a and 21b is shown in FIG. As shown, the superconducting wire 15 can be efficiently defined in the direction along the main surfaces 15a and 15b.

  In the superconducting coil body 10, the other magnetic circuit member (second magnetic body 14) includes a plurality of magnetic members (magnetic bodies 24 a, 24 a) arranged with a gap 28 therebetween as shown in FIGS. 5 and 13. 24b).

  In the superconducting coil body 10, as shown in FIGS. 7 and 15, the magnetic circuit member and the other magnetic circuit member may be connected and integrated (the magnetic circuit member and the other magnetic circuit member are magnetic bodies). 23 may be configured). In this case, the magnetic circuit can be reliably formed by the coil body (coil bodies 21a, 21b) and the magnetic body 23 in which the magnetic circuit member and the other magnetic circuit member are integrated. For this reason, possibility that the magnetic flux line | wire which penetrates the main surface of the superconducting wire 15 will generate | occur | produce with respect to a coil main-body part (coil body 21a, 21b) can be reduced.

  As shown in FIGS. 1 to 6, 8 to 11, 13 and 15, the superconducting coil body 10 is arranged so as to surround the outer periphery of the coil main body, and the outer peripheral side around which the superconducting wire 15 is wound. You may further provide the coil main-body part (peripheral coil body 11a, 11b). The outer coil body (outer coil bodies 11a and 11b) has a surface (upper surface of the outer coil body 11a) located on the end surface side intersecting with the main surface of the superconducting wire 15, and the other located on the opposite side of the surface. Surface (lower surface of the outer peripheral coil body 11b). The magnetic circuit member (first magnetic body 13) may include an outer peripheral side facing surface facing the surface (upper surface of the outer peripheral coil body 11a) in the outer peripheral coil body (outer coil bodies 11a and 11b). . In the magnetic circuit member (first magnetic body 13), the end portion of the outer peripheral facing surface protrudes outward (in the direction in which the outer peripheral facing surface extends) from the surface of the outer peripheral coil body (the outer peripheral coil bodies 11a and 11b). It may be. The other magnetic circuit member (second magnetic body 14) may include another outer peripheral facing surface that faces the other surface of the outer peripheral coil body (outer peripheral coil bodies 11a and 11b). In the other magnetic circuit member (second magnetic body 14), the end portion of the other outer peripheral facing surface is the other surface of the outer peripheral coil body (the outer peripheral coil bodies 11a and 11b) (the lower surface of the outer peripheral coil body 11b). You may protrude outward.

  Further, the superconducting coil body 10 is disposed so as to surround the outer periphery of the coil main body, as shown in FIGS. 8 to 14, and the outer coil body (outer coil bodies 11 a and 11 b) around which the superconducting wire is wound. May be further provided. The outer coil body (outer coil bodies 11a and 11b) has a surface (upper surface of the outer coil body 11a) located on the end surface side intersecting with the main surface of the superconducting wire 15, and the other located on the opposite side of the surface. The surface (the lower surface of the outer peripheral coil body 11b) may be included. The magnetic circuit member (first magnetic body 13) is connected to the outer peripheral side facing surface facing the surface (the upper surface of the outer peripheral coil body 11a) of the outer peripheral side coil main body, and the outer peripheral side facing surface and intersects the outer peripheral side facing surface. An outer peripheral side surface extending in the direction (a side surface of the portion of the first magnetic body 13 facing the outer peripheral coil body 11a) may be included. In the magnetic circuit member (the first magnetic body 13 and the magnetic body 23), the outer peripheral side surface is located at the end near the outer peripheral coil main body (the outer peripheral coil bodies 11a and 11b). You may have the plane part 17 extended along the direction where main surface 15a, 15b of the superconducting wire 15 which comprises is extended. The other magnetic circuit member (second magnetic body 14) includes an outer peripheral side opposing surface that opposes the other surface (the lower surface of the outer peripheral coil body 11b) of the outer peripheral coil body (the outer peripheral coil bodies 11a and 11b), Other outer peripheral side surfaces that extend in a direction intersecting with the other outer peripheral facing surface may be included. In the other magnetic circuit member (second magnetic body 14), the other outer peripheral side surface is located at the end portion on the side close to the outer peripheral side coil body (outer peripheral coil bodies 11a and 11b) as shown in FIG. Moreover, you may have the plane part 17 extended along the direction where main surface 15a, 15b of the superconducting wire 15 which comprises an outer peripheral side coil main-body part extends.

  In this case, the coil main body (inner peripheral coil bodies 12a and 12b) and the outer peripheral coil main body (outer coil bodies 11a and 11b) are arranged concentrically around the central axis 16, and these coil main bodies and Since the magnetic circuit member (first magnetic body 13) and the other magnetic circuit member (second magnetic body 14) are arranged so as to connect to the outer peripheral side coil main body portion, these coil main body portions (inner peripheral coil body 12a) are arranged. 12b), a magnetic circuit member (first magnetic body 13), an outer coil body (outer coil bodies 11a and 11b), and another magnetic circuit member (second magnetic body 14) can form a magnetic circuit. . As a result, since the generation of magnetic flux lines that penetrate the main surfaces 15a and 15b of the superconducting wire 15 constituting the coil main body and the outer coil body can be more reliably suppressed, loss due to the presence of the magnetic flux lines. Can be suppressed.

  In the superconducting coil body 10, the magnetic circuit members (first magnetic body 13, magnetic body 23) and other magnetic circuit members (second magnetic body 14) are formed by laminating a plurality of plate-like magnetic bodies (for example, electromagnetic steel plates). A laminated body may be sufficient. In this case, since the first magnetic body 13, the magnetic body 23, and the second magnetic body 14 can be formed by processing, for example, an electromagnetic steel plate, a heat treatment for sintering or the like to manufacture the first magnetic body 13 or the like. As a result, the manufacturing cost of the superconducting coil body 10 can be reduced.

  In the superconducting coil body 10, the magnetic circuit members (first magnetic body 13, magnetic body 23) and other magnetic circuit members (second magnetic body 14) may be sintered bodies obtained by sintering a magnetic material. Good. In this case, the first magnetic body 13, the magnetic body 23, and the second magnetic body 14 having any shape can be obtained by molding the magnetic material into a predetermined shape and then sintering it. Therefore, the degree of freedom in designing the shapes of the first magnetic body 13, the magnetic body 23, and the second magnetic body 14 can be increased.

  In the superconducting coil body 10, the magnetic circuit members (first magnetic body 13, magnetic body 23) and other magnetic circuit members (second magnetic body 14) may be a composite of a magnetic material and a resin. . In this case, the first magnetic material in which the magnetic material is dispersedly arranged in the resin is obtained by containing the magnetic material (for example, powder made of the magnetic material) in the resin and solidifying it into an arbitrary shape (for example, molding). The body 13 can be easily obtained.

  In the superconducting coil body 10, the magnetic circuit members (first magnetic body 13, magnetic body 23) and other magnetic circuit members (second magnetic body 14) are composed of a plurality of constituent members as shown in FIGS. A joined body obtained by joining (for example, a plurality of constituent members 13a to 13d shown in FIG. 16) may be used. In this case, about the 1st magnetic body 13, etc., the said 1st magnetic body 13 can be formed by forming a some structural member first and joining these structural members. Therefore, even if the first magnetic body 13 or the like has a complicated shape, the first magnetic body 13 or the like having a complicated shape can be easily formed as the constituent members 13a to 13d can be manufactured for each part that can be easily formed. it can.

  Moreover, the material and manufacturing method can be changed for every structural member 13a-13d in consideration of the use conditions of the superconducting coil body 10, and the like. As a result, the characteristics of the superconducting device including the superconducting coil body 10 can be improved.

  A superconducting motor 100 as a superconducting device according to the present invention includes the superconducting coil body 10. In this case, a highly efficient superconducting motor 100 in which loss in the superconducting coil body 10 is suppressed can be realized.

(Example)
In order to confirm the effect of the present invention, the following simulation was performed. Specifically, the loss (so-called AC loss) is calculated by simulation for three types of superconducting coil bodies, and a configuration showing the minimum AC loss value is experimentally obtained. The values were compared.

(Consideration)
Example superconducting coil body:
The configuration of the superconducting coil body 10 shown in FIG. 10 was adopted. Specifically, the inner peripheral coil bodies 12a and 12b and the outer peripheral coil bodies 11a and 11b all have 28 turns, and the size of the superconducting wire 15 constituting these coil bodies is width: 4.65 mm, thickness: 0.31 mm. The electrical resistance per coil total length was 1 × 10 ⁻⁵ Ω.

  Further, as the sizes of the first magnetic body 13 and the second magnetic body 14, the width of the surface facing the outer peripheral coil bodies 11a and 11b and the inner peripheral coil bodies 12a and 12b shown in FIG. 10 is set to 6.34 mm. For the magnetic characteristics of the first magnetic body 13 and the second magnetic body 14, a physical property library of electrical steel sheets mounted on the software used for the simulation was used.

Superconducting coil body of Comparative Example 1:
Without using a magnetic material, the superconducting coil was divided into two stages, and the angle formed by the main surface of the superconducting wire at each stage with respect to the central axis of the coil was changed so as to be as much as possible in the direction of the magnetic flux lines. A superconducting wire having the same conditions as the superconducting wire constituting the superconducting coil body of the above example was used, and the total number of turns at each stage was the same as that of the superconducting coil body of the above example.

Superconducting coil body of Comparative Example 2:
Using the superconducting wire under the same conditions as the superconducting coil body of the above-described embodiment, the outer peripheral coil bodies 11a, 11b and the inner peripheral coil bodies 12a, 12b are arranged in an annular state. The outer peripheral coil bodies 11a and 11b and the inner peripheral coil bodies 12a and 12b were arranged. This is because the magnetic flux lines formed by these coil bodies are arranged in a circular shape when viewed in the cross section shown in FIG. 10, and the superconductivity constituting the coil body and the direction in which the magnetic flux lines extend. This is because the main surface of the wire is arranged as parallel as possible. And the plate-shaped magnetic body was arrange | positioned so that the circumference | surroundings of these outer periphery coil bodies 11a and 11b and the inner periphery coil bodies 12a and 12b may be enclosed from four directions. These magnetic bodies are provided in order to attract external magnetic flux lines and prevent the external magnetic flux lines from entering the coil body.

(Examination method)
With respect to the systems of the above-described Examples and Comparative Examples 1 and 2, the AC loss value was obtained by simulation while appropriately changing the arrangement and size of the magnetic body and the arrangement of the coil body. In addition, as a common condition of the simulation at this time, a current value per wire rod: 172 A (crest value), a motor rotation speed of 735 rpm, and the like were used. The software used in the simulation is JMAG.

(result)
As a result of the above simulation, the minimum AC loss value was 179 W in the system of the example of the present invention. On the other hand, the minimum AC loss value for the system of Comparative Example 1 was 446 W, and the minimum AC loss value for the system of Comparative Example 2 was 238 W. Thus, it was shown that the system of the embodiment of the present invention can reduce the AC loss most.

  It should be understood that the embodiments and examples disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is particularly advantageously applied to superconducting equipment such as a superconducting motor using a superconducting coil.

  DESCRIPTION OF SYMBOLS 10 Superconducting coil body, 11, 11a, 11b Outer coil body, 12, 12a, 12b Inner coil body, 13 1st magnetic body, 13a-13d, 14b Constituent member, 14 2nd magnetic body, 14a Side surface, 15 Superconducting wire 15a main surface, 16, 130 central axis, 17 plane portion, 19 convex portion, 21a, 21b coil body, 23, 23a, 23b, 24a, 24b magnetic body, 28 gap, 29 bonding agent, 37 surface portion, 51 bonding Part, 100 superconducting motor, 105 cooling container inner tank, 106 cooling container outer tank, 107 cooling container, 116 rotor shaft, 117 refrigerant, 118 rotating shaft, 120 permanent magnet, 121 stator yoke, 123 stator core, 131 longitudinal axis.

Claims (20)

A coil body wound with a superconducting wire,
In the coil main body portion, the magnetic circuit member is disposed so as to face the surface located on the end surface side intersecting with the main surface of the superconducting wire, and includes a magnetic body.
The magnetic circuit member includes a facing surface facing the surface of the coil main body,
In the magnetic circuit member, the end portion of the facing surface is a superconducting coil body that protrudes outward from the surface of the coil body portion. The magnetic circuit member includes a side surface that extends in a direction that is continuous with the opposing surface and intersects the opposing surface,
2. The superconducting coil body according to claim 1, wherein the side surface has an inclined portion that is located at an end portion on a side close to the coil main body portion and is inclined with respect to a direction in which the main surface of the superconducting wire extends. The magnetic circuit member includes a side surface that extends in a direction that is continuous with the opposing surface and intersects the opposing surface,
2. The superconducting coil body according to claim 1, wherein the side surface has a flat portion located at an end portion on a side close to the coil main body portion and extending along a direction in which the main surface of the superconducting wire extends.   The superconducting coil body according to any one of claims 1 to 3, wherein the magnetic circuit member is composed of a plurality of magnetic members disposed with a gap therebetween. The coil body includes an other surface located on the opposite side of the surface,
The superconducting coil body according to any one of claims 1 to 4, further comprising another magnetic circuit member made of a magnetic body and disposed so as to face the other surface of the coil main body. The other magnetic circuit member includes another facing surface that faces the other surface of the coil body portion,
6. The superconducting coil body according to claim 5, wherein, in the other magnetic circuit member, an end portion of the other facing surface protrudes outward from the other surface of the coil main body portion. The other magnetic circuit member includes another side surface extending in a direction intersecting with the other facing surface and continuing to the other facing surface,
The superconducting coil body according to claim 6, wherein the other side surface has an inclined portion that is located at an end portion on a side close to the coil main body portion and is inclined with respect to a direction in which the main surface of the superconducting wire extends. The other magnetic circuit member includes another side surface extending in a direction intersecting with the other facing surface and continuing to the other facing surface,
The superconducting coil body according to claim 6, wherein the other side surface is located at an end portion on a side close to the coil main body portion and has a flat portion extending along a direction in which the main surface of the superconducting wire extends.   The superconducting coil body according to any one of claims 5 to 8, wherein the other magnetic circuit member is composed of a plurality of magnetic members arranged with a gap therebetween.   The superconducting coil body according to any one of claims 5 to 8, wherein the magnetic circuit member and the other magnetic circuit member are connected and integrated. It is arranged so as to surround the outer periphery of the coil body part, further comprising an outer coil side coil body part wound with a superconducting wire,
The outer peripheral coil body includes a surface located on the end face side intersecting with the main surface of the superconducting wire, and the other surface located on the opposite side of the surface,
The magnetic circuit member includes an outer peripheral side opposing surface that opposes the surface of the outer peripheral coil body portion,
In the magnetic circuit member, an end portion of the outer peripheral side facing surface protrudes outward from the surface of the outer peripheral coil body portion,
The other magnetic circuit member includes another outer peripheral facing surface that faces the other surface of the outer peripheral coil body portion,
9. The other magnetic circuit member according to claim 5, wherein an end portion of the other outer peripheral facing surface protrudes outward from the other surface of the outer peripheral coil body portion. Superconducting coil body.   The superconducting coil body according to any one of claims 5 to 11, wherein the other magnetic circuit member is a laminated body in which a plurality of plate-like magnetic bodies are laminated.   The superconducting coil body according to any one of claims 5 to 11, wherein the other magnetic circuit member is a sintered body obtained by sintering a magnetic material.   The superconducting coil body according to any one of claims 5 to 11, wherein the other magnetic circuit member is a composite of a magnetic material and a resin.   The superconducting coil body according to any one of claims 1 to 14, wherein the other magnetic circuit member is a joined body obtained by joining a plurality of constituent members.   The superconducting coil body according to any one of claims 1 to 15, wherein the magnetic circuit member is a laminated body in which a plurality of plate-like magnetic bodies are laminated.   The superconducting coil body according to any one of claims 1 to 15, wherein the magnetic circuit member is a sintered body obtained by sintering a magnetic material.   The superconducting coil body according to any one of claims 1 to 15, wherein the magnetic circuit member is a composite of a magnetic material and a resin.   The superconducting coil body according to any one of claims 1 to 18, wherein the magnetic circuit member is a joined body obtained by joining a plurality of constituent members. A superconducting device comprising the superconducting coil body according to claim 1.

Images