Annular Stator Structure and Its Superconducting Motor

Abstract

The present application discloses an annular stator structure and a superconducting motor. The annular stator structure includes at least two iron cores forming an annular body, a plurality of windings, a plurality of support members, a plurality of fasteners, an insulating layer, a fixed outer ring, and a fixed inner ring. Each winding is sleeved on the annular body, and each support member is sleeved on the annular body. Each support member is provided with an installation groove, and one winding is arranged in each installation groove. The fasteners are used to fix adjacent two support members. The insulating layer covers and wraps the annular body, and the insulating layer is located between the winding and the annular body. The fixed outer ring is arranged around the plurality of support members and fixed to the outer diameter surfaces of the plurality of support members. The fixed inner ring is surrounded by the plurality of support members and fixed to the inner diameter surfaces of the plurality of support members. The superconducting motor includes the above-mentioned annular stator structure. Through the above arrangement, the space occupancy rate of the winding at the end can be reduced, so as to reduce the generation of ineffective magnetic fields at the stator end, thereby improving the motor power of the superconducting motor.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to an annular stator structure and a superconducting motor thereof. Background Art

[0002] A superconducting motor is a motor whose field winding is made of superconducting materials and which is wound with wires that can carry high-density currents in strong magnetic fields.

[0003] In the prior art, superconducting motors usually use linear armature windings, and the linear armature windings include straight segments and end windings. Among them, the straight segments of the windings are used to drive the rotor to rotate, that is, the magnetic field generated by the straight segments of the windings is an effective magnetic field, and the end windings are the parts of the windings that are cross-wound at the ends of the stator, and the magnetic field generated by the end windings cannot be used to drive the rotor to rotate, that is, the magnetic field generated by the end windings is an invalid magnetic field. However, this winding method at the ends of the stator will cause the end windings to occupy a large amount of space in the stator, thereby reducing the space occupancy rate of the straight segments of the windings, and then reducing the volume of the straight segments of the windings in the stator, resulting in a reduction in the effective magnetic field generated by the straight segments. In summary, the excessive space occupancy rate of the end windings in the linear armature windings in the prior art will lead to a reduction in the effective magnetic field density in the stator, thereby reducing the power of the superconducting motor.

[0004] Therefore, how to improve the power of superconducting motors is a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide a high-power annular stator structure and a superconducting motor thereof.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] A ring-shaped stator structure, comprising at least two iron cores constituting a ring body, a plurality of windings, a plurality of supports, a plurality of fasteners, an insulating layer, a fixed outer ring and a fixed inner ring. Each winding is sleeved on the ring body. Each support is a fan-shaped body, and each support is sleeved on the ring body. Each support is provided with a mounting groove, and the mounting groove penetrates the support along the axial direction of the ring body. A winding is arranged in each mounting groove, so that each winding is fixed through a mounting groove; each support is provided with a fixing groove on both sides along the circumference of the ring body, and the fixing grooves between two adjacent support members cooperate to form a fixing hole. Each fastener is passed through a fixing hole and connected to the fixing hole, so that two adjacent support members are fixed. The insulating layer covers and wraps the ring body, and the insulating layer is located between the winding and the ring body. The fixed outer ring is arranged around the plurality of supports and fixed to the outer diameter surface of the plurality of supports. The fixed inner ring is surrounded by the plurality of supports and fixed to the inner diameter surface of the plurality of supports.

[0008] Furthermore, a cooling groove is provided on the inner wall of the mounting groove, and the cooling groove penetrates the support member along the axial direction of the annular body, and the cooling groove is used to transport cooling liquid to cool the winding. The cooling groove is located on the inner wall of the mounting groove along the circumference of the annular body. The cooling groove is located at at least one end of the mounting groove along the radial direction of the annular body.

[0009] Furthermore, the annular stator structure comprises a cooling pipe, in which a coolant is built, and the cooling pipe is located in a cooling groove so that the coolant can cool the winding.

[0010] Furthermore, each support member is provided with a sleeve groove which penetrates the support member along the circumference of the annular body. The annular body is at least partially located in the sleeve groove and abuts or is connected to the inner wall of the sleeve groove. The cooling groove is located on at least one side of the sleeve groove along the radial direction of the annular body.

[0011] Furthermore, the fixing groove is arranged to penetrate the support member along the axial direction of the annular body, and the fixing groove and the sleeve groove at least partially overlap along the axial direction of the annular body.

[0012] Further, a section plane perpendicular to the axial direction of the annular body is defined, and the section of the fixing hole cut by the section plane is the fixed section. The fixed section is an n-gon, where n is an integer greater than 3. Alternatively, or the fixed section is a shape formed by at least one curve and at least one straight line. Alternatively, the fixed section is a shape formed by at least one curve.

[0013] Further, the fixing hole is a threaded hole, the fastener is provided with an external thread, and each fastener is threadedly connected to a fixing hole. Alternatively, the fixing hole is a through hole, and each fastener is interference fit with a fixing hole. Alternatively, the annular stator structure includes a plurality of connectors, each fastener includes a rod and a head, the minimum width of the head is greater than the aperture of the fixing hole, each rod is passed through a fixing hole and fixed to a connector, wherein the rod is provided with an external thread, and the connector is a nut.

[0014] Furthermore, the fastener and the support are both made of non-magnetic materials.

[0015] Furthermore, the winding is in the form of a hollow cuboid, and the hollow portion of the winding is used to sleeve the annular body, so that the winding can be arranged around the annular body.

[0016] To achieve the above objectives, this application adopts the following technical solutions:

[0017] A superconducting motor comprises the annular stator structure.

[0018] The above-mentioned annular stator structure and its superconducting motor can form an annular armature winding, and the winding does not need to be cross-wound at the stator end, thereby reducing the generation of ineffective magnetic field at the end of the winding, thereby increasing the magnetic field density of the effective magnetic field of the annular stator structure, and further increasing the motor power of the superconducting motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of the annular stator structure provided in an embodiment of the present application.

[0020] Figure 2 A schematic diagram of the internal structure of the annular stator structure provided in an embodiment of the present application.

[0021] Figure 3 This is a frequency spectrum distribution diagram of the maximum vibration displacement of the entire annular stator structure provided in an embodiment of the present application.

[0022] Figure 4 This is a frequency spectrum distribution diagram of the maximum vibration speed of the entire annular stator structure provided in an embodiment of the present application.

[0023] Figure 5 This is a frequency spectrum distribution diagram of the maximum vibration acceleration of the entire annular stator structure provided in an embodiment of the present application.

[0024] Figure 6 A vibration displacement simulation diagram of the annular stator structure provided in an embodiment of the present application when the vibration frequency of the annular stator structure is 100 Hz.

[0025] Figure 7 Schematic diagram of the combination of the support member, winding and fastener of the annular stator structure provided in an embodiment of the present application.

[0026] Figure 8 A stress simulation diagram of the annular stator structure provided in an embodiment of the present application when the vibration frequency of the annular stator structure is 100 Hz.

[0027] Fig. 9 A temperature diagram of the annular stator structure provided in an embodiment of the present application.

[0028] Fig.10 Schematic diagram of the fluid pressure of the coolant in the annular stator structure provided in an embodiment of the present application.

[0029] Fig.11 A schematic structural diagram of the annular stator structure from another perspective provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the specific implementation manner of the present application will be clearly and completely described below in conjunction with the drawings in the implementation manner of the present application.

[0031] It should be noted that the words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantitative limitation, but indicate the existence of at least one. "Multiple" or "several" means at least two. Unless otherwise specified, words such as "front", "back", "left", "right", "bottom" and / or "top" are only for the convenience of description and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0032] The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0033] like Figure 1 and Figure 2 As shown, the present application provides an annular stator structure 100, which includes an iron core 11, a plurality of windings 12, a plurality of supports 13, a plurality of fasteners 14, an insulating layer (not shown), a fixed outer ring 15 and a fixed inner ring 16. Specifically, the iron core 11 is used to form an annular body 111 to facilitate the formation of an annular armature winding. The winding 12 is used to generate an induced magnetic field, and each winding 12 is sleeved on the annular body 111. Each support member 13 is a fan-shaped body, and each support member 13 is sleeved on the annular body 111, and the support member 13 is used to support the winding 12. The fastener 14 is used to fix the support member 13. The insulating layer covers and wraps the annular body 111, and the insulating layer is used to insulate the annular stator structure 100 from the ground. The fixed outer ring 15 is used to fix the outer diameter surface 131 of the support member 13, and the fixed inner ring 16 is used to fix the inner diameter surface 132 of the support member 13. The outer diameter surface 131 of the support member 13 refers to the surface of the support member 13 away from the central axis of the annular body 111 , and the inner diameter surface 132 of the support member 13 refers to the surface of the support member 13 facing the central axis of the annular body 111 .

[0034] More specifically, at least two iron cores 11 are provided, and the annular body 111 is formed by splicing a plurality of iron cores 11. In this way, the winding 12 and the support member 13 can be sleeved on the annular body 111 from the splicing of the iron cores 11, so as to facilitate the assembly of the annular stator structure 100 and enable the annular stator structure 100 to form an annular armature winding.

[0035] Through the above arrangement, the annular armature winding can avoid the winding 12 from being cross-wound on the end of the annular stator structure 100, so as to reduce the volume of the winding 12 at the end of the annular stator structure 100, thereby reducing the ineffective magnetic field generated by the winding 12 at the end of the annular stator structure 100, so as to help improve the density of the effective magnetic field of the annular stator structure 100. At the same time, the above arrangement can reduce the space occupancy rate of the end of the annular stator structure 100, so as to help reduce the end volume of the annular stator structure 100, thereby reducing the overall volume of the annular stator structure 100, so as to further improve the magnetic field density of the effective magnetic field of the annular stator structure 100, thereby improving the power of the superconducting motor.

[0036] Secondly, the present application sets the insulating layer on the annular body 111, and there is no need to insulate the winding 12, thereby simplifying the insulation difficulty of the annular stator structure 100, which is beneficial to the insulation treatment of the annular stator structure 100, so as to facilitate the connection of the annular stator structure 100 with high voltage current, thereby increasing the magnetic field strength generated by the annular stator structure 100 and further increasing the power of the superconducting motor.

[0037] In addition, the present application can reduce the volume of the winding 12 at the end of the annular stator structure 100 by avoiding cross winding of the winding 12 at the end of the annular stator structure 100, thereby reducing the induced magnetic field strength generated by the winding 12 at the end of the annular stator structure 100, thereby avoiding the excessive induced magnetic field strength generated at the end, which leads to a reduction in the uniformity of the air gap in the annular stator structure 100, and avoids the above-mentioned reduction in air gap uniformity, which leads to a reduction in the uniformity of the overall magnetic field in the annular stator structure 100, thereby improving the operating stability of the superconducting motor. At the same time, it is beneficial to reduce the vibration of the superconducting motor during operation, so as to reduce the noise generated by the superconducting motor during operation.

[0038] It should be noted that the annular stator structure 100 of the present application can be applied to a superconducting motor or a common motor, and the present application does not limit this. In addition, the present application takes the annular stator structure 100 applied to a superconducting motor as an example for explanation.

[0039] like Figure 3 , Figure 4 and Figure 5 As shown, the vibration of the annular stator structure 100 is calculated using Ansys simulation software. Figure 3is a spectrum distribution diagram of the maximum vibration displacement of the annular stator structure 100 as a whole, Figure 3 The abscissa Frequency is the vibration frequency generated when the annular stator structure 100 is in operation, and the ordinate Amplitude is the maximum vibration displacement amplitude when the annular stator structure 100 is in operation. Figure 4 is a spectrum distribution diagram of the vibration velocity of the annular stator structure 100 as a whole, Figure 4 The horizontal coordinate Frequency is the vibration frequency generated when the annular stator structure 100 is running, and the vertical coordinate Amplitude is the maximum vibration speed change amplitude when the annular stator structure 100 is running. Figure 5 is a spectrum distribution diagram of the maximum vibration acceleration of the annular stator structure 100 as a whole, Figure 5 The horizontal axis Frequency is the vibration frequency generated when the annular stator structure 100 is running, and the vertical axis Amplitude is the amplitude of the vibration acceleration change when the annular stator structure 100 is running. Figure 3 , Figure 4 and Figure 5 It can be seen that when the vibration frequency of the annular stator structure 100 is 100 Hz, the vibration displacement amplitude, vibration velocity amplitude and vibration acceleration amplitude of the annular stator structure 100 are the largest. Therefore, by detecting the overall vibration condition of the annular stator structure 100 when the vibration frequency is 100 Hz, the maximum vibration displacement of the annular stator structure 100 can be obtained.

[0040] like Figure 6 As shown, the maximum vibration displacement of the annular stator structure 100 is calculated using Ansys simulation software when the vibration frequency of the annular stator structure 100 is 100 Hz. As can be seen from the figure, when the vibration frequency is 100 Hz, the maximum vibration displacement of the annular stator structure 100 is 0.0032176 mm. It can be understood that the vibration displacement amplitude of the annular stator structure 100 of the present application is micron-level, which has little interference on the operation of the annular stator structure 100, thereby improving the operation stability of the annular stator structure 100 and the superconducting motor.

[0041] like Figure 2 and Figure 7As shown, in this embodiment, each support member 13 is provided with a mounting groove 133, and the mounting groove 133 penetrates the support member 13 along the axial direction of the annular body 111, and a winding 12 is arranged in each mounting groove 133, so that each winding 12 is fixed by a mounting groove 133. In this way, the winding 12 can be limited by the mounting groove 133, thereby improving the connection stability between the winding 12 and the support member 13. In addition, through the above-mentioned arrangement, the winding 12 can be prevented from being cross-wound and fixed at the end of the annular stator structure 100, which is conducive to improving the effective magnetic field density of the annular stator structure, thereby improving the power of the superconducting motor.

[0042] Specifically, each support member 13 is provided with fixing grooves 134 on both sides of the circumference of the annular body 111, and the fixing grooves 134 between two adjacent support members 13 cooperate to form fixing holes 135 (refer to Fig.11 ); Each fastener 14 is inserted into a fixing hole 135 and connected to the fixing hole 135, so that two adjacent support members 13 are fixed. In this way, the support member 13 is fixed by the cooperation of the fastener 14 and the fixing hole 135, so that the winding 12 can be fixed. Compared with fixing the winding 12 by bonding or other methods, the present application adopts the method of fixing the support member 13 and the fastener 14, which supports the winding 12 more stably, thereby facilitating improving the overall structural strength of the annular stator structure 100.

[0043] In some embodiments, a limiting groove 1111 is provided on the outer wall of the annular body 111 (see Figure 2 ), when the fastener 14 is inserted into the fixing hole 135, the fastener 14 is at least partially located in the limiting groove 1111. In this way, the limiting groove 1111 can support the fastener 14, and the fastener 14 can also limit the relative position of the annular body 111 and the support member 13 through the limiting groove 1111, so as to avoid the relative rotation of the annular body 111 and the support member 13 during the operation of the annular stator structure 100, thereby improving the operation stability of the annular stator structure 100.

[0044] More specifically, the insulating layer is located between the winding 12 and the annular body 111. This arrangement allows the insulating layer to not be directly wrapped around the winding 12 during insulation, thereby avoiding interference with the heat dissipation of the winding 12, thereby facilitating the heat dissipation efficiency of the winding 12 and improving the operating performance of the annular stator structure 100.

[0045] In this embodiment, the fixed outer ring 15 is arranged around the multiple support members 13 and fixed to the outer diameter surfaces 131 of the multiple support members 13. The fixed inner ring 16 is surrounded by the multiple support members 13 and fixed to the inner diameter surfaces 132 of the multiple support members 13. In some embodiments, the fixed outer ring 15 and the support members 13 can be interference connected, and the fixed inner ring 16 and the support members 13 can also be interference connected. Such a configuration can simplify the assembly process of the fixed outer ring 15 and the fixed inner ring 16 while limiting the support members 13, thereby improving the assembly efficiency of the annular stator structure 100.

[0046] It should be noted that the fixed outer ring 15 and the outer diameter surface 131 of the support member 13 can also be fixed by bonding, and the fixed inner ring 16 and the inner diameter surface 132 of the support member 13 can also be fixed by bonding. Therefore, the present application does not limit the connection method between the fixed outer ring 15 and the outer diameter surface 131 of the support member 13, and the connection method between the fixed inner ring 16 and the inner diameter surface 132 of the support member 13.

[0047] like Figure 8 As shown, the maximum stress of the annular stator structure 100 is calculated using Ansys simulation software when the vibration frequency of the annular stator structure 100 is 100 Hz. It can be seen from the simulation results that the maximum stress of the annular stator structure 100 is only 5.2843 MPa, while the allowable upper limit of the internal stress of the existing solid insulating materials, such as laminates, fiberglass, epoxy and other materials, is generally at the level of 100 MPa, which is much greater than the maximum stress of the annular stator structure 100, 5.2843 MPa. Therefore, in terms of stress, the solid insulating material in the annular stator structure 100 of the present application is very stable, thereby further improving the operating stability of the annular stator structure 100.

[0048] like Figure 7 As shown, as an embodiment, a cooling groove 136 is provided on the inner wall of the mounting groove 133, and the cooling groove 136 penetrates the support member 13 axially along the annular body 111, and the cooling groove 136 is used to transport a coolant to cool the winding 12. In this way, the temperature of the winding 12 during operation can be reduced by the coolant in the cooling groove 136 to avoid damage to the winding 12 due to excessive temperature of the winding 12, thereby facilitating the improvement of the service life of the winding 12 and the operational stability of the winding 12. Secondly, the structure of the cooling groove 136 is simple, which can reduce the complexity of the manufacturing process of the annular stator structure 100, thereby improving the production efficiency of the annular stator structure 100.

[0049] Specifically, the cooling groove 136 is located on the inner wall of the mounting groove 133 along the circumferential direction of the annular body 111, and more specifically, the cooling groove 136 is located at least at one end of the mounting groove 133 along the radial direction of the annular body 111. In this way, by increasing the number of cooling grooves 136, the volume of the coolant in contact with the winding 12 can be increased, thereby improving the cooling effect of the coolant on the winding 12.

[0050] As an embodiment, the annular stator structure 100 includes a cooling pipe (not shown), the cooling pipe is filled with coolant, and the cooling pipe is located in the cooling groove 136 so that the coolant can cool the winding 12. In this way, the cooling pipe can avoid leakage of coolant, thereby improving the use safety of the annular stator structure 100.

[0051] It should be noted that the present application does not restrict whether to set up a cooling pipe, and it only needs to satisfy that the cooling groove 136 can flow the cooling liquid.

[0052] As an embodiment, each support member 13 is provided with a sleeve groove 137, which penetrates the support member 13 along the circumferential direction of the annular body 111, and the sleeve groove 137 is used to sleeve the support member 13 on the annular body 111. Specifically, the annular body 111 is at least partially located in the sleeve groove 137 and abuts or connects with the inner wall of the sleeve groove 137, and the cooling groove 136 is located on at least one side of the sleeve groove 137 along the radial direction of the annular body 111. In this way, along the radial direction of the annular body 111, the cooling groove 136 is in contact with at least one end of the winding 12, so that the coolant can be in contact with at least one end of the winding 12, thereby improving the cooling effect of the coolant on the winding 12.

[0053] like Fig. 9 As shown in FIG. 1 , when the cooling liquid is introduced into the cooling groove 136 and the flow rate of the cooling liquid entering the cooling groove 136 is 3 mm / s, the overall temperature field of the annular stator structure 100 is measured during operation. Fig. 9 It can be seen that the maximum temperature of the annular stator structure 100 of the present application is only 94.4 degrees Celsius, which is lower than the Class B insulation temperature of 130 degrees Celsius, so that the annular stator structure 100 of the present application meets the temperature requirements, thereby improving the operating stability of the annular stator structure 100.

[0054] It should be noted that Class B insulation temperature is the maximum allowable operating temperature of electrical equipment such as motors and transformers.

[0055] like Fig.10 As shown, when the cooling liquid is introduced into the cooling groove 136 and the flow rate of the cooling liquid at the point where the cooling liquid enters the cooling groove 136 is 3 mm / s, the fluid pressure of the cooling liquid is measured for the annular stator structure 100 during operation. Fig.10It can be seen that the maximum fluid pressure of the annular stator structure 100 of the present application does not exceed 600 Pa, which is the fluid pressure that can be achieved by the oil pump, which is beneficial to reducing the use cost of the annular stator structure 100.

[0056] As an embodiment, the fixing groove 134 is arranged to penetrate the support member 13 along the axial direction of the annular body 111, and the fixing groove 134 and the sleeve groove 137 at least partially overlap along the axial direction of the annular body 111. In this way, the fixing groove 134 can utilize a part of the structure of the sleeve groove 137, so that there is no need to open a complete fixing groove 134 on the support member 13, which is conducive to simplifying the processing technology of the support member 13. In addition, it is also possible to avoid excessive grooving on the support member 13, which leads to a reduction in the structural strength of the support member 13, thereby facilitating the improvement of the overall structural strength of the annular stator structure 100.

[0057] like Fig.11 As shown, as an embodiment, a cross-sectional plane 101 perpendicular to the axial direction of the annular body 111 is defined, and the section of the fixing hole 135 cut by the cross-sectional plane 101 is a fixed section. Specifically, the fixed section is an n-gon, where n is an integer greater than 3. Such a configuration can make the fixed section polygonal. Exemplarily, the fixed section can be in a polygonal shape such as a triangle or a rectangle, and the polygonal shape can limit the movement of the fastener 14 in the fixing hole 135, so that the fastener 14 can fix the relative position of the adjacent support member 13, thereby improving the connection stability between the fastener 14 and the adjacent support member 13.

[0058] Alternatively, the fixed cross section is a shape formed by at least one curve and at least one straight line. Exemplarily, the fixed cross section is a semicircular shape. In this way, the fastener 14 can fix the relative positions of two adjacent support members 13 through the semicircular fixed cross section.

[0059] Alternatively, the fixed cross section is a shape formed by at least one curve. Exemplarily, the fixed cross section is circular. In this way, the fastener 14 can fix the relative positions of two adjacent support members 13 through the circular fixed cross section.

[0060] It should be noted that the fixed cross section of the present application is circular. It is understandable that the circular shape is simple, which is conducive to simplifying the processing technology of the fixing hole 135 and the fastener 14, thereby helping to improve the processing efficiency of the annular stator structure 100 and reduce the processing cost of the annular stator structure 100.

[0061] As an optional implementation, the fixing hole 135 is a threaded hole, the fastener 14 is provided with an external thread, and each fastener 14 is threadedly connected to a fixing hole 135. In this way, the fastener 14 can be connected to the support member 13 through the threaded connection between the fastener 14 and the fixing hole 135, thereby fixing the relative positions of two adjacent support members 13.

[0062] Alternatively, the fixing hole 135 is a through hole, and each fastener 14 is interference-fitted with a fixing hole 135. In this configuration, the connection between the fixing member and the fixing hole 135 can be achieved through the interference connection between the fixing member and the fixing hole 135, thereby simplifying the assembly process of the fixing member and the supporting member 13, thereby improving the assembly efficiency of the annular stator structure 100.

[0063] Alternatively, the annular stator structure 100 includes a plurality of connectors (not shown), each fastener 14 includes a rod and a head, the minimum width of the head is greater than the aperture of the fixing hole 135, each rod is passed through a fixing hole 135 and fixed to a connector, wherein the rod is provided with an external thread, and the connector is a nut. In this arrangement, the connection stability between the fastener 14 and the support member 13 can be improved through the threaded connection between the connector and the rod, and then the head is matched with the fixing hole 135, thereby improving the connection stability between the support members 13.

[0064] As an embodiment, the fastener 14 and the support member 13 are both made of non-magnetic materials. This arrangement can avoid the generation of an interfering magnetic field when the fastener 14 and the support member 13 are made of magnetic materials, thereby avoiding interference with the effective magnetic field generated by the winding 12, which is beneficial to improving the magnetic field strength of the annular stator structure 100.

[0065] As an embodiment, the winding 12 is a hollow cuboid, and the hollow part of the winding 12 is used to sleeve the annular body 111, so that the winding 12 can be arranged around the annular body 111. In this way, the hollow cuboid structure can extend the length of the straight section of the winding 12 to increase the effective magnetic field density generated by the winding 12. In addition, the straight section of the winding 12 can use the end space of the annular stator structure 100, thereby reducing the waste of the end space of the annular stator structure 100 and further improving the magnetic field density of the annular stator structure 100.

[0066] The present application also provides a superconducting motor (not shown), which includes the above-mentioned annular stator structure 100. The annular stator structure 100 can increase the magnetic field density of the effective magnetic field, thereby increasing the power intensity of the superconducting motor. It can also reduce the vibration generated during the operation of the superconducting motor, thereby improving the operating stability of the superconducting motor.

[0067] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A ring-shaped stator structure, characterized in that: include: At least two iron cores forming a ring body; A plurality of windings, each of the windings being sleeved on the annular body; A plurality of support members, each of which is in a sector shape and is sleeved on the annular body, each of which is provided with a mounting groove, the mounting groove axially passing through the support member along the annular body, and each of which is provided with a winding, so that each of the windings is fixed by one of the mounting grooves; each of which is provided with a fixing groove on both sides of the circumference of the annular body, and the fixing grooves between two adjacent support members cooperate to form a fixing hole; A plurality of fasteners, each of which is passed through one of the fixing holes and connected to the fixing hole, so as to fix two adjacent support members; an insulating layer, the insulating layer covers and wraps the annular body, and the insulating layer is located between the winding and the annular body; A fixed outer ring, which is disposed around the plurality of support members and fixed to the outer diameter surfaces of the plurality of support members; A fixed inner ring is surrounded by the plurality of support members and fixed to inner diameter surfaces of the plurality of support members.

2. The annular stator structure according to claim 1, characterized in that: A cooling groove is provided on the inner wall of the mounting groove, the cooling groove penetrates the support member axially along the annular body, and the cooling groove is used to transport cooling liquid to cool the winding; The cooling groove is located on the inner wall of the mounting groove along the circumference of the annular body; The cooling groove is located at at least one end of the mounting groove along the radial direction of the annular body.

3. The annular stator structure according to claim 2, characterized in that: The annular stator structure comprises a cooling pipe, wherein the cooling pipe is filled with a cooling liquid, and the cooling pipe is located in the cooling groove so that the cooling liquid can cool the winding.

4. The annular stator structure according to claim 2, characterized in that: Each of the support members is provided with a sleeve groove, which penetrates the support member along the circumferential direction of the annular body. The annular body is at least partially located in the sleeve groove and abuts or is connected to the inner wall of the sleeve groove. The cooling groove is located on at least one side of the sleeve groove along the radial direction of the annular body.

5. The annular stator structure according to claim 4, characterized in that: The fixing groove is arranged to penetrate the support member along the axial direction of the annular body, and the fixing groove and the sleeve groove at least partially overlap along the axial direction of the annular body.

6. The annular stator structure according to claim 1, characterized in that: A section plane perpendicular to the axial direction of the annular body is defined, and the section of the fixing hole cut by the section plane is the fixing section; The fixed cross section is an n-gon, wherein n is an integer greater than 3; Or the fixed cross section is a shape formed by at least one curve and at least one straight line; Or the fixed cross section is a shape formed by at least one curve.

7. The annular stator structure according to claim 1, characterized in that: The fixing hole is a threaded hole, the fastener is provided with an external thread, and each fastener is threadedly connected to one of the fixing holes; Or, the fixing hole is a through hole, and each of the fasteners is interference fit with one of the fixing holes; Alternatively, the annular stator structure includes a plurality of fasteners, each of which includes a rod and a head, the minimum width of the head being greater than the aperture of the fixing hole, each of the rods being passed through a fixing hole and fixed to a connecting member, wherein the rod is provided with an external thread, and the connecting member is a nut.

8. The annular stator structure according to claim 1, characterized in that: The fastener and the support are both made of non-magnetic materials.

9. The annular stator structure according to claim 1, characterized in that: The winding is in the form of a hollow cuboid, and the hollow portion of the winding is used to sleeve the annular body, so that the winding can be arranged around the annular body.

10. A superconducting motor, characterized in that: The superconducting motor comprises the annular stator structure according to any one of claims 1 to 9.

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