Rotor of a superconducting rotating electric machine and superconducting rotating electric machine

Abstract

To suppress deterioration of characteristics of a superconducting wire caused by local strain induced by stress acting on a superconducting coil.SOLUTION: A rotor of a superconducting rotating electric machine according to an embodiment includes a winding mounting shaft, a superconducting coil arranged around the winding mounting shaft, a support ring arranged to surround the superconducting coil, and a support layer arranged in a space surrounded by the superconducting coil, and the winding mounting shaft, and the support ring, and supporting and fixing the superconducting coil.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Embodiments of the present invention relate to a rotor of a superconducting rotating electrical machine and a superconducting rotating electrical machine.

Background Art

[0002] In a rotor of a superconducting rotating electrical machine, superconducting coils are provided at respective parts of a winding attachment shaft. The superconducting coils function as field coils by being cooled to an operating temperature at which they become superconducting. As the structure of such a superconducting coil, one wound in an oval shape that is long in one direction is known. Further, in order to prevent a decrease in the critical current value due to magnetic flux lines penetrating the inside of such a superconducting coil, improve cooling efficiency, and improve the fixing strength of the coil, various spacers (such as a plate-shaped spacer arranged to be sandwiched in the gap between coils and a comb-shaped spacer arranged to be inserted from around the coil) are arranged for the superconducting coil.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The rotor of a superconducting rotating electric machine is subjected to torque in the circumferential direction relative to the rotational axis and centrifugal force in the radial direction relative to the rotational axis during rotation. At that time, the superconducting coil is subjected to very large and time-varying forces unique to rotating bodies. Specifically, during rotation, the superconducting coil is subjected to compressive stress in the rotational direction and tensile stress in the reversing direction due to the torque, and to tensile stress in the radial direction and compressive stress in the radial direction of the rotor axis due to the centrifugal force. In particular, if localized strain is introduced into the superconducting wire within the superconducting coil, the properties of the superconducting wire may deteriorate, potentially compromising the integrity of the superconducting rotor. Therefore, it is desirable to fix the superconducting coil so that it is not subjected to vibration or relative displacement due to the forces acting during rotation.

[0005] Conventional methods of arranging spacers can fix the superconducting coils, but they cannot solve the problems mentioned above. For example, if a spindle-shaped spacer is placed in the gap in the stacking direction of the coils, there is a gap between the coils in the areas where the spindle-shaped spacer is not present, and there is a risk that the superconducting coils may vibrate or experience relative displacement due to the force acting during rotation. Also, if a comb-shaped spacer is fitted into the coil, there are places where the corners of the comb-shaped spacer come into contact with the coil surface, and there is a risk that localized bending strain will be introduced starting from these points.

[0006] The problem that this invention aims to solve is to provide a rotor for a superconducting rotating electric machine and a superconducting rotating electric machine that can suppress the deterioration of the characteristics of superconducting wire material due to local strain introduced into the superconducting coil. [Means for solving the problem]

[0007] The rotor of the superconducting rotating electric machine according to this embodiment comprises a winding mounting shaft, a superconducting coil arranged around the winding mounting shaft, a support ring arranged to surround the winding mounting shaft, and a support layer arranged in the space surrounded by the superconducting coil, the winding mounting shaft, and the support ring, which supports and fixes the superconducting coil. The superconducting coil is filled with and impregnated with a resin layer, and the support layer is, continuously supporting the surface of the superconducting coil death Furthermore, the structure is configured such that when the superconducting coil is cooled to its operating temperature, the thermal contraction of the support layer is smaller than that of the surrounding components. [Effects of the Invention]

[0008] According to the present invention, it is possible to suppress the deterioration of the properties of superconducting wire material due to local strain introduced into the superconducting coil. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a cross-sectional view showing an example of the overall configuration of the rotor of a superconducting rotating electric machine according to the first embodiment. [Figure 2] Figure 2 is a cross-sectional view showing an example of the cross-sectional shape in section AA of the structure shown in Figure 1. [Figure 3] Figure 3 is a view showing an example of the shape of the structure shown in Figure 2 when viewed from the U direction. [Figure 4] Figure 4 is a cross-sectional view showing an example of the cross-sectional shape in a VV section of the structure shown in Figure 3. [Figure 5] Figure 5 is a cross-sectional view showing an example of the configuration of the superconducting wire 30 shown in Figure 4. [Figure 6] Figure 6 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the second embodiment (a modified example of the structure shown in Figure 2). [Figure 7] Figure 7 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the third embodiment (a modified example of the structure shown in Figure 6). [Figure 8] Figure 8 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the fourth embodiment (a modified example of the structure shown in Figure 7). [Figure 9] Figure 9 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the fifth embodiment (a modified example of the structure shown in Figure 8). [Modes for carrying out the invention]

[0010] Hereinafter, embodiments will be described with reference to the drawings.

[0011] <First Embodiment> First, the first embodiment will be described.

[0012] (Basic Structure of Rotor in Superconducting Rotating Electric Machine) First, referring to FIGS. 1 and 2, the basic structure of the rotor of the superconducting rotating electric machine according to the first embodiment will be described.

[0013] FIG. 1 is a cross-sectional view showing an example of the overall configuration of the rotor of the superconducting rotating electric machine according to the first embodiment. FIG. 2 is a cross-sectional view showing an example of the cross-sectional shape in the A-A cross-section of the structure shown in FIG. 1.

[0014] Here, for the sake of easy understanding of the structure of the main part, the illustration of the refrigerant flow path, coil connection conductors, feeders, etc. is omitted, and a part of the dimensions of each part shown is made larger or smaller than the actual ones. Therefore, the size relationship of each part shown is different from the actual one.

[0015] The rotor 1 of the superconducting rotating electric machine shown in FIGS. 1 and 2 has a winding mounting shaft 12, a support ring 13, a rotor shaft or rotor core 11, a superconducting coil 20, a support layer 40, etc.

[0016] Around the rotor shaft or rotor core 11, a winding mounting shaft 12 for mounting the superconducting coils 20 at regular intervals in the circumferential direction is arranged, and the superconducting coils 20 are arranged at each part of the winding mounting shaft 12. A support ring 13 is provided around the winding mounting shaft 12. The support ring 13 is arranged so as to surround the periphery of the winding mounting shaft 12. Further, a support layer 40 for supporting and fixing the superconducting coils 20 is provided in the space surrounded by the superconducting coils 20, the winding mounting shaft 12, and the support ring 13.

[0017] The superconducting coil 20 is arranged to be point-symmetric with respect to the axis center of the rotor 1. Although FIGS. 1 and 2 show an example in which four superconducting coils 20 are arranged, there is no limitation on the number of superconducting coils 20. As long as two or more superconducting coils 20 are arranged to be point-symmetric, there is no limitation on the number.

[0018] The support layer 40 is arranged in the space surrounded by the winding attachment shaft 12 and the support ring 13 so as to support and fix the superconducting coil 20. In this example, the support layer 40 is configured to fill the space surrounded by the winding attachment shaft 12, the support ring 13, and the superconducting coil 20 without any gaps.

[0019] The support layer 40 may be formed, for example, by filling and impregnating a thermosetting resin such as a melamine resin, a urea resin, an epoxy resin, a silicone resin, or a phenol resin. However, it may also be formed by melting and filling / impregnating a low melting point metal or alloy, or it may be formed of a composite in which metal powder or oxide powder is dispersed in the thermosetting resin. By using such metal powder or oxide powder fillers, it is possible to easily adjust the thermal expansion coefficient and elastic modulus.

[0020] As long as the space surrounded by the winding attachment shaft 12 and the support ring 13 can be filled and the superconducting coil 20 can be supported and fixed, the support layer 40 may be formed using materials other than those described above.

[0021] It is desirable that the thermal expansion coefficient of the support layer 40 is smaller than the respective thermal expansion coefficients of the winding attachment shaft 12 and the support ring 13.

[0022] (Superconducting Coil 20 and its Surrounding Structure) FIG. 3 is a perspective view showing an example of the shape when the structure shown in FIG. 2 is viewed from the U direction. FIG. 4 is a cross-sectional view showing an example of the cross-sectional shape in the V-V cross-section of the structure shown in FIG. 3.

[0023] As shown in Figures 3 and 4, the superconducting coil 20 is formed by winding a high-temperature superconducting wire (hereinafter referred to as "superconducting wire 30") and an insulating member 24 in a spiral shape around a winding frame 21 (including the coil lead electrode 23). Insulating plates 22 are placed on the upper and lower surfaces of the resulting winding portion 26, and a resin layer 25 is filled and impregnated between the insulating plates 22 on these upper and lower surfaces and the winding portion 26 (superconducting wire 30 and insulating member 24).

[0024] The insulating board 22 is formed from, for example, insulating films such as polyimide, polyester polyurethane, polyamide, polyamide-imide, and polyvinyl formal; thermosetting resins such as phenolic resin, urea resin, and melamine resin; glass fiber reinforced plastic (GFRP) and carbon fiber reinforced plastic (CFRP), thereby improving the insulating protection and mechanical strength of the winding portion 26.

[0025] (Composition of superconducting wire 30) Figure 5 shows an example of the configuration of the superconducting wire 30 shown in Figure 4.

[0026] The superconducting wire 30 is composed of a thin-film multilayer wire in which a stabilizing layer 35 is applied to a multilayer film structure in which an intermediate layer 32, an RE (rare earth element) based oxide superconducting layer 33, and a protective layer 34 are laminated on a tape-shaped metal substrate 31.

[0027] The tape-shaped metal substrate 31 is formed from, for example, stainless steel or a nickel-based alloy such as Hastelloy (registered trademark).

[0028] The intermediate layer 32 is a layer that plays a role in improving the orientation of the oxide superconducting layer 33 and preventing diffusion, and is formed from, for example, magnesium oxide.

[0029] The oxide superconducting layer 33 is a layer that exhibits superconductivity (hereinafter referred to as the "superconducting layer"), for example, the RE123 system (RE1Ba2Cu3O y This is a superconducting thin film having ). RE is a rare earth element, such as Nd, Gd, Ho, Sm, or Y.

[0030] The protective layer 34 is a layer provided for the purpose of protecting the superconducting layer from oxidation, etc., and is formed from Ag or the like.

[0031] The stabilization layer 35 is provided to divert excess current when it flows through the superconducting layer, thereby preventing the superconducting layer from burning, and is made of, for example, copper.

[0032] Furthermore, the superconducting wire 30 has a strength in the wire thickness direction (perpendicular to the plane, direction of thin film lamination) that is an order of magnitude smaller than its strength in the wire width direction and longitudinal direction (in-plane direction). If cracks occur within the superconducting layer or delamination occurs, the superconducting properties will deteriorate.

[0033] In the first embodiment, as described above, since the support layer 40 is provided in the space surrounded by the winding mounting shaft 12, the support ring 13, and the superconducting coil 20, the superconducting coil 20 can be mechanically and firmly supported via the support layer 40, thereby suppressing vibration and relative displacement during rotation. Furthermore, since the surface of the superconducting coil 20 is continuously supported, it is possible to prevent the introduction of localized bending strain.

[0034] Furthermore, in the first embodiment, if the thermal expansion coefficient of the support layer 40 is configured to be smaller than that of the winding mounting shaft 12 and the support ring 13, as described above, then when the superconducting coil 20 is cooled to the operating temperature, the thermal contraction of the support layer 40 is smaller than that of the surrounding members. As a result, compressive stress acts isotropically on the superconducting coil 20 from the support layer 40, allowing for stronger support of the superconducting coil 20. Therefore, vibration and relative displacement can be prevented from being applied to the superconducting coil 20 during rotation, and localized bending strain can be prevented from being introduced into the superconducting wire 30.

[0035] Therefore, according to the first embodiment, it is possible to suppress the deterioration of the characteristics of the superconducting wire 30 due to the stress acting on the superconducting coil 20, and to provide a rotor 1 and superconducting rotating electric machine that maintain soundness.

[0036] <Second Embodiment> Next, a second embodiment will be described. In the following, the explanation of parts common to the first embodiment will be omitted, and the explanation will focus on the parts that differ from the first embodiment.

[0037] Figure 6 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the second embodiment (a modified example of the structure shown in Figure 2).

[0038] The difference between the rotor 1 according to this second embodiment and the rotor 1 according to the first embodiment described above is that the support layer 40 consists of a first support structure 41 arranged around the winding mounting shaft 12 and the superconducting coil 20, and a first filler 43 arranged between the first support structure 41 and the support ring 13.

[0039] In other words, in the configuration shown in Figure 2, the superconducting coil 20 is supported and fixed to the winding mounting shaft 12 by the first support structure 41, and the superconducting coil 20 is supported and fixed to the first support structure 41 and the support ring 13 by the first filler 43.

[0040] The first support structure 41 is configured to fill the space surrounded by the winding mounting shaft 12 and the superconducting coil 20 without any gaps, and the first filler 43 is configured to fill the space surrounded by the support ring 13 and the superconducting coil 20 without any gaps. These first support structures 41 and the first filler 43 may be made of a thermosetting resin, a low-melting-point metal or alloy, or a composite in which metal powder or oxide powder is dispersed in a thermosetting resin, similar to the support layer 40. The support layer 40 may be made of a material other than those mentioned above, as long as it can fill the space surrounded by the winding mounting shaft 12 and the support ring 13 without any gaps and support and fix the superconducting coil 20. Furthermore, the first support structure 41 and the first filler 43 may be made of the same material, or different materials may be used in combination.

[0041] Furthermore, it is desirable that the thermal expansion coefficients of the first support structure 41 and the first filler 43 are smaller than the thermal expansion coefficients of the winding mounting shaft 12 and the support ring 13, respectively, and it is also desirable that the thermal expansion coefficient of the first support structure 41 is smaller than the thermal expansion coefficient of the first filler 43.

[0042] In the second embodiment, the first support structure 41 can be provided in the space surrounded by the winding mounting shaft 12 and the superconducting coil 20 before the support ring 13 is positioned. This improves workability during assembly and allows the first support structure 41 to be provided while visually confirming its position, resulting in a first support structure 41 that adheres more tightly to the surface of the superconducting coil 20 without any gaps.

[0043] Furthermore, in the second embodiment, since different materials can be used for the first support structure 41 and the first filler 43, the degree of freedom in material selection is improved, and the adjustment of the coefficient of thermal expansion becomes easier.

[0044] Furthermore, if the thermal expansion coefficients of the first support structure 41 and the first filler 43 are configured to be smaller than those of the winding mounting shaft 12 and the support ring 13, respectively, when the superconducting coil 20 is cooled to its operating temperature, the thermal contraction of the support layer 40 is smaller than that of the surrounding members. As a result, compressive stress acts isotropically on the superconducting coil 20 from the first support structure 41 and the first filler 43, allowing the superconducting coil 20 to be supported more firmly.

[0045] Furthermore, if the thermal expansion coefficient of the first support structure 41 is configured to be smaller than that of the first packing material 43, compressive stress will act more isotropically on the superconducting coil 20 from the first support structure 41 and the first packing material 43, allowing the superconducting coil 20 to be supported more firmly.

[0046] Therefore, in the second embodiment, vibration and relative displacement applied to the superconducting coil 20 during rotation can be suppressed, and since the surface of the superconducting coil 20 is continuously supported, localized bending strain can be prevented.

[0047] Therefore, according to the second embodiment, the deterioration of the characteristics of the superconducting wire 30 due to stress acting on the superconducting coil 20 can be further suppressed, and a rotor 1 and superconducting rotating electric machine with maintained integrity can be provided.

[0048] <Third Embodiment> Next, a third embodiment will be described. In the following, the explanation of parts common to the first and second embodiments will be omitted, and the focus will be on the parts that differ from the first and second embodiments.

[0049] Figure 7 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the third embodiment (a modified example of the structure shown in Figure 6).

[0050] The difference between the rotor 1 of this third embodiment and the rotor 1 of the first and second embodiments described above is that the support layer 40 consists of a second support structure 42 arranged to be in contact with the outer diameter side of the superconducting coil 20 of the rotor 1, and a second filler 44 arranged in the space between the superconducting coil 20, the winding mounting shaft 12, the support ring 13, and the second support structure 42.

[0051] In other words, in the configuration shown in Figure 7, the superconducting coil 20 is supported and fixed to the winding mounting shaft 12 and support ring 13 by the second support structure 42 and the second filler 44.

[0052] The second support structure 42 is a structure that is incorporated before the second filler 44 during the assembly of the rotor 1. It may be formed from, for example, glass fiber reinforced plastic (GFRP) and carbon fiber reinforced plastic (CFRP), or from a composite material in which an insulating film such as polyimide, polyester polyurethane, polyamide, polyamide-imide, and polyvinyl formal is attached to the surface of an Al-based alloy, Cu-based alloy, stainless steel, etc., or a thermosetting resin such as phenolic resin, urea resin, and melamine resin is applied. It is desirable that the surface of the second support structure 42 that is in contact with the superconducting coil 20 (the surface of the second support structure 42 on the inner diameter side of the rotor 1) matches the shape of the surface of the superconducting coil 20. It is also desirable that the elastic modulus of the second support structure 42 is greater than that of the second filler 44.

[0053] The second packing material 44 may be composed of a thermosetting resin, a low-melting-point metal or alloy, or a composite in which metal powder or oxide powder is dispersed in a thermosetting resin, similar to the support layer 40 and the first packing material 43. The support layer 40 may be constructed using materials other than those mentioned above, as long as they can completely fill the space surrounded by the winding mounting shaft 12 and the support ring 13 and support and fix the superconducting coil 20.

[0054] In the third embodiment, the second support structure 42 and the second filler 44 support and fix the superconducting coil 20 to the winding mounting shaft 12 and the support ring 13, which facilitates the formation of a support layer 40 between the superconducting coil 20 and the support ring 13, and suppresses the generation of air gaps between the support layer 40 and the superconducting coil 20. Therefore, it is effective in preventing vibration and relative displacement from being applied to the superconducting coil 20 during rotation, and in preventing the introduction of localized bending strain.

[0055] Furthermore, if the elastic modulus of the second support structure 42 is configured to be greater than that of the second filler 44, the mechanical strength of the support layer 40 will be greater than in the first and second embodiments, resulting in stronger support and fixation of the superconducting coil 20. Therefore, this is effective in preventing vibration and relative displacement from being applied to the superconducting coil 20 during rotation, and in preventing the introduction of localized bending strain.

[0056] Therefore, according to the third embodiment, the deterioration of the characteristics of the superconducting wire 30 due to stress acting on the superconducting coil 20 can be further suppressed, and a rotor 1 and superconducting rotating electric machine with maintained soundness can be provided.

[0057] <Fourth Embodiment> Next, a fourth embodiment will be described. In the following, the explanation of parts common to the third embodiment will be omitted, and the explanation will focus on the parts that differ from the third embodiment.

[0058] Figure 8 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the fourth embodiment (a modified example of the structure shown in Figure 7).

[0059] Figure 8 is a radial cross-sectional view showing an example of the configuration of the rotor 1 of a superconducting rotating electric machine according to the fourth embodiment.

[0060] The difference between the rotor 1 of this fourth embodiment and the rotor 1 of the third embodiment described above is that the shape of the outer diameter side of the second support structure 42 of the rotor 1 has been changed. Specifically, a curved portion 42R is provided on a part of the surface of the outer diameter side of the rotor 1 of the second support structure 42, and the curved portion 42R and the inner surface of the support ring 13 are configured to be in surface contact. Specifically, the radius of curvature of the curved portion 42R is configured to match the inner diameter of the support ring 13.

[0061] In the fourth embodiment, a curved portion 42R is provided on a part of the outer diameter side surface of the second support structure 42 on the rotor 1 side, and the radius of curvature of the curved portion 42R of the second support structure 42 is configured to match the inner diameter of the support ring 13. As a result, the second support structure 42 makes surface contact with the support ring 13, which acts to suppress the generation of stress concentration areas due to centrifugal force.

[0062] Therefore, according to the fourth embodiment, since it acts to suppress the generation of stress concentration areas on the surface of the superconducting coil 20 due to centrifugal force, the deterioration of the characteristics of the superconducting wire 30 due to the stress acting on the superconducting coil 20 can be further suppressed, and a rotor 1 and superconducting rotating electric machine with better soundness can be provided.

[0063] <Fifth Embodiment> Next, a fifth embodiment will be described. In the following, the explanation of parts common to the third and fourth embodiments will be omitted, and the explanation will focus on the parts that differ from the third and fourth embodiments.

[0064] Figure 9 is a cross-sectional view showing an example of the rotor structure of a superconducting rotating electric machine according to the fifth embodiment (a modified example of the structure shown in Figure 8).

[0065] The difference between the rotor 1 according to this fifth embodiment and the rotor 1 according to the third and fourth embodiments described above is that the second support structure 42 and the winding mounting shaft 12 are mechanically fixed together by a fastening member 45.

[0066] The fastening member 45 may consist of, for example, a helicoil or screw hole provided on the winding mounting shaft 12 and a bolt for fastening. The fastening member 45 is configured to apply compressive stress to the superconducting coil 20 via the second support structure 42 and the winding mounting shaft 12.

[0067] In the fifth embodiment, the second support structure 42 and the winding mounting shaft 12 are mechanically fixed by the fastening member 45, so that the superconducting coil 20 can be mechanically supported more firmly and acts to reduce the bending stress acting on the superconducting coil 20 due to centrifugal force.

[0068] Therefore, according to the fifth embodiment, the same effects as the third embodiment can be obtained, and because the centrifugal force reduces the bending stress acting on the superconducting coil 20, the deterioration of the characteristics of the superconducting wire 30 due to the stress acting on the superconducting coil 20 can be further suppressed, and a rotor 1 and superconducting rotating electric machine with better soundness can be provided.

[0069] As described in detail above, according to the embodiment, it is possible to suppress the deterioration of the characteristics of the superconducting wire due to local strain introduced into the superconducting coil.

[0070] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0071] 1...Rotor, 11...Rotor shaft or rotor core, 12...Winding mounting shaft, 13...Support ring, 20...Superconducting coil, 21...Winding frame, 22...Insulating plate, 23...Coil lead electrode, 24...Insulating member, 25...Resin layer, 26...Winding section, 30...High-temperature superconducting wire (superconducting wire), 31...Metal substrate, 32...Intermediate layer, 33...Oxide superconducting layer, 34...Protective layer, 35...Stabilizing layer, 40...Support layer, 41...First support structure, 42...Second support structure, 42R...Curved surface section, 43...First filler, 44...Second filler, 45...Fastening member.

Claims

1. Winding mounting shaft and A superconducting coil arranged around the winding mounting shaft, A support ring is positioned to surround the winding mounting shaft, A support layer is arranged in the space surrounded by the superconducting coil, the winding mounting shaft, and the support ring, and supports and fixes the superconducting coil. It is equipped with, The superconducting coil is filled with and impregnated with a resin layer, and the support layer continuously supports the surface of the superconducting coil. The superconducting coil is configured such that when it is cooled to its operating temperature, the thermal contraction of the support layer is smaller than that of the surrounding components. Rotor of a superconducting rotating electric machine.

2. The thermal expansion coefficient of the support layer is smaller than the thermal expansion coefficients of the winding mounting shaft and the support ring, respectively. The rotor of the superconducting rotating electric machine according to claim 1.

3. The support layer comprises a first support structure arranged around the winding mounting shaft and the superconducting coil, and a first filler arranged between the first support structure and the support ring. The rotor of the superconducting rotating electric machine according to claim 1.

4. The thermal expansion coefficients of the first support structure and the first filler are smaller than the thermal expansion coefficients of the winding mounting shaft and the support ring, respectively. The rotor of the superconducting rotating electric machine according to claim 3.

5. The thermal expansion coefficient of the first support structure is smaller than the thermal expansion coefficient of the first filler. The rotor of the superconducting rotating electric machine according to claim 4.

6. The support layer comprises a second support structure arranged to be in contact with the outer diameter side of the rotor of the superconducting coil, and a second filler arranged in the space between the superconducting coil, the winding mounting shaft, the support ring, and the second support structure. The rotor of the superconducting rotating electric machine according to claim 1.

7. The elastic modulus of the second support structure is greater than the elastic modulus of the second filler. The rotor of the superconducting rotating electric machine according to claim 6.

8. A curved portion is provided on a part of the surface on the outer diameter side of the rotor of the second support structure. The curved surface and the inner surface of the support ring are in surface contact. The rotor of the superconducting rotating electric machine according to claim 6.

9. The radius of curvature of the curved portion matches the inner diameter of the support ring. The rotor of a superconducting rotating electric machine according to claim 8.

10. Winding mounting shaft and A superconducting coil arranged around the winding mounting shaft, A support ring is positioned to surround the winding mounting shaft, A support layer is arranged in the space surrounded by the superconducting coil, the winding mounting shaft, and the support ring, and supports and fixes the superconducting coil. It is equipped with, The support layer comprises a second support structure arranged to be in contact with the outer diameter side of the rotor of the superconducting coil, and a second filler arranged in the space between the superconducting coil, the winding mounting shaft, the support ring, and the second support structure. The second support structure and the winding mounting shaft are configured to be mechanically fixed together by a fastening member. Rotor of a superconducting rotating electric machine.

11. A superconducting rotating electric machine configured using the rotor of a superconducting rotating electric machine according to any one of claims 1 to 10.

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