Stator structure, motor and equipment using the motor

Abstract

This application discloses a stator structure, a motor, and a device using the motor. The stator structure includes a stator core, multiple winding assemblies, and multiple fixing assemblies. The stator core includes at least two bent sections, which are sequentially connected to form a ring-shaped stator core. Each winding assembly is sleeved on the stator core circumferentially. Each fixing assembly is fixedly connected to the stator core, and the fixing assemblies are sequentially arranged circumferentially. At least one winding assembly is disposed between two adjacent fixing assemblies, thereby fixing the winding assemblies circumferentially. The motor includes the aforementioned stator structure. This design avoids wear caused by vibration of the winding assemblies along the circumferential direction of the stator core, thus improving the service life of the stator structure.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more particularly to a stator structure, a motor, and equipment using the motor. Background Technology

[0002] Motors can withstand higher voltages, thus reducing the current intensity when operating at rated power. Since current intensity is directly proportional to line losses, reducing the motor's current intensity reduces line losses, making the motor suitable for high-power applications. In existing technologies, the stator structure of a motor generates significant electromagnetic forces. If the internal components are not tightly connected, the windings are prone to vibration under these electromagnetic forces, affecting the stator's operational stability and reducing its lifespan. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide a stator structure, a motor, and a device using the motor, wherein the stator structure has a long service life.

[0004] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, embodiments of this application provide a stator structure, which includes a stator core, a plurality of winding assemblies, and a plurality of fixing assemblies. The stator core includes at least two bent sections, which are sequentially connected to form an annular stator core. Each winding assembly is sleeved on the stator core along its circumference. Each fixing assembly is fixedly connected to the stator core, and the fixing assemblies are sequentially arranged along the circumference of the stator core. At least one winding assembly is disposed between two adjacent fixing assemblies, such that the winding assemblies are fixed along the circumference of the stator core.

[0005] In one possible implementation, the fixing component includes a first fixing member that is annular and sleeved on the stator core circumferentially.

[0006] In one possible implementation, a gap is formed between two adjacent winding assemblies, and a first fixing member is located in the gap and connected to the two winding assemblies corresponding to the gap.

[0007] In one possible implementation, the fixing component includes a support formed on the outer diameter surface of the stator core.

[0008] In one possible implementation, each curved segment is provided with a support.

[0009] In one possible implementation, the support is located at the middle of the curved section along its circumference.

[0010] In one possible implementation, each curved segment is provided with multiple supports, which are arranged along the axial direction of the curved segment.

[0011] In one possible implementation, multiple supports are located at the middle of the curved section along its circumference.

[0012] In one possible implementation, the fixing assembly further includes a second fixing member, which is fixedly connected to the support to form a ring structure, with a portion of the stator core along its circumference located within the ring structure.

[0013] In one possible implementation, the second fixing member includes a first fixing part, a second fixing part, and a connecting part. One end of the first fixing part and one end of the second fixing part are connected by the connecting part. The other end of the first fixing part is connected to one side of the support part along the axial direction of the curved section, and the other end of the second fixing part is connected to the other side of the support part along the axial direction of the curved section. The first fixing part and the second fixing part are also connected to two winding assemblies on both sides of the support part, respectively.

[0014] In one possible implementation, the support portion is integrally formed with the stator core.

[0015] In one possible implementation, the fixing component further includes a first fixing member, which is annular and sleeved on the stator core along the circumference of the stator core. The support portion and the first fixing member are arranged at intervals along the circumference of the stator core. At least one winding assembly is provided between adjacent support portions and the first fixing member.

[0016] In one possible implementation, adjacent curved segments are interlocked.

[0017] In one possible implementation, a connecting protrusion is formed at one end of any curved segment and a connecting groove is formed at the other end, and two adjacent curved segments are connected by the connecting protrusion and the connecting groove.

[0018] In one possible implementation, arc-shaped grooves are formed at both ends of the curved section along its circumference, and the stator structure also includes a fixing post, which is inserted into the arc-shaped grooves of two adjacent curved sections so that the two adjacent curved sections are connected.

[0019] In one possible implementation, the winding assembly includes multiple mutually abutting winding modules. Each winding module includes an annular winding and a support assembly. The annular winding is fixedly mounted around the support assembly, and the support assembly has a mounting opening. The support assembly is fitted onto the stator core circumferentially through the mounting opening, and the shape of the mounting opening matches the circumferential cross-section of the stator core, thereby fixing the winding assembly axially and radially along the stator core. With this configuration, the winding assembly can be fixed circumferentially, axially, and radially along the stator core by the support assembly and the fixing assembly, thereby further preventing vibration of the winding assembly and improving the service life of the stator structure.

[0020] In one possible implementation, the support assembly includes a first support member and a second support member, with an annular winding fixed between the first support member and the second support member, and both the first support member and the second support member being sleeved on the stator core along the circumference of the stator core.

[0021] In one possible implementation, the structure of the second support member is identical to that of the first support member and is a mirror image of each other.

[0022] In one possible implementation, the first support member includes a rectangular protrusion and two linear protrusions extending axially along the stator core. The two linear protrusions are located on both sides of the rectangular protrusion along the radial direction of the stator core, and an annular winding is wound around the rectangular protrusion and abuts against the two linear protrusions.

[0023] In one possible implementation, the rectangular protrusion has a through-hole that fits onto the stator core, and the through-hole forms at least a partial mounting opening.

[0024] In one possible implementation, in the same winding assembly, a first support located on one side of the stator core circumferentially is defined as a first side support, and a second support located on the other side of the stator core circumferentially is defined as a second side support. Both the first and second side supports have snap-fit ​​grooves on both sides along the axial direction of the stator core. Each fixing component has a snap-fit ​​structure. The two fixing components on both sides of the winding assembly along the circumferential direction of the stator core are defined as the first fixing component and the second fixing component. The first side support and the first fixing component are connected to the snap-fit ​​groove through the snap-fit ​​structure, and the second side support and the second fixing component are connected to the snap-fit ​​groove through the snap-fit ​​structure.

[0025] In one possible implementation, in the same winding assembly, two adjacent annular windings are connected by a connecting segment. The first and second supports, which are not connected to the fixed assembly, are defined as the third side supports. The third side supports have slots on both sides along the axial direction of the stator core, and the slots allow the connecting segment to pass through.

[0026] In one possible implementation, both the first side support and the second side support have chamfered structures extending along the axial direction of the stator core. The chamfered structures are located on the side of the first side support and the second side support that is close to the axis of the stator core. Both the first fixing component and the second fixing component have protruding structures, and each protruding structure abuts against a corresponding chamfered structure.

[0027] In one possible implementation, the annular winding includes two ends and two straight segments that abut against two linear protrusions respectively. One end of the two straight segments is connected by one end, and the other end of the two straight segments is connected by the other end. The first support is formed with two clamping protrusions for fixing the two ends respectively. The two clamping protrusions are located on both sides of the rectangular protrusion along the axial direction of the stator core.

[0028] In one possible implementation, each clamping protrusion is formed with at least one notch, the notch making each clamping protrusion have a toothed structure.

[0029] In one possible implementation, the notch can be filled with a cooling medium to cool the end.

[0030] In one possible implementation, a winding slot is formed between the linear protrusion and the rectangular protrusion to accommodate at least a portion of the annular winding. At least one cooling channel is provided on the sidewall of the winding slot. The cooling channel extends along the axial direction of the stator core, and the two ends of the cooling channel are respectively connected to the two side surfaces of the first support member along the axial direction of the stator core.

[0031] In one possible implementation, the maximum length of the cooling channel along the stator core axis is less than or equal to the minimum distance between the two ends of the annular winding along the stator core axis.

[0032] In one possible implementation, a cooling groove is formed on the surface of the first support member away from the stator core axis.

[0033] In one possible implementation, the first support member extends along the axial direction of the stator core on both sides to form two extension plates. The stator structure also includes phase-to-phase jumpers and grounding wires, and the extension plates are used to support the phase-to-phase jumpers and grounding wires.

[0034] In one possible implementation, the extension plate is formed with a grounding fixing groove located on the side of the extension plate away from the stator core axis, and the grounding wire is at least partially engaged in the grounding fixing groove.

[0035] In one possible implementation, each fixing component has a grounding groove formed on both sides along the axial direction of the stator core, and the grounding groove cooperates with the grounding fixing groove to fix at least part of the grounding wire.

[0036] In one possible implementation, the extension plate is formed with interphase fixing slots located on the side of the extension plate close to the stator core axis, and the interphase jumper wires are at least partially engaged in the interphase fixing slots.

[0037] In one possible implementation, each fixing component has phase-to-phase slots formed on both sides along the axial direction of the stator core, and the phase-to-phase slots cooperate with the phase-to-phase fixing slots to fix at least part of the phase-to-phase jumper wires.

[0038] In one possible implementation, the toroidal winding includes a multi-turn coil, an inter-turn insulation portion, an insulation layer, a filler layer, and a high-resistance anti-corona layer. An inter-turn insulation portion is provided between two adjacent coil turns. The insulation layer wraps the multi-turn coil and the inter-turn insulation portion. The filler layer fills the gap between the insulation layer and the multi-turn coil, as well as the gap between the insulation layer and the inter-turn insulation portion. The high-resistance anti-corona layer wraps around the insulation layer.

[0039] In one possible implementation, the stator core has chamfered portions on both sides along its axial direction. The chamfered portions are used to reduce the non-uniform electric field strength of the air in contact with the stator core. The chamfered portions are located at the junction of the inner diameter surface and the side surface of the stator core, and / or the chamfered portions are located at the junction of the outer diameter surface and the side surface of the stator core. The side surface is one side surface of the stator core along its axial direction.

[0040] In one possible implementation, the portion of the first fixing member located in the radial direction of the stator core does not contact the stator core, such that a cooling gap for cooling the stator core is formed between this portion and the stator core.

[0041] In one possible implementation, the fixing assembly has ventilation openings at both ends along the axial direction of the stator core, with one opening of the ventilation opening facing the stator core.

[0042] In one possible implementation, the stator structure further includes lead wire fixing devices for fixing the end leads of the winding assembly. The fixing assembly has fixing holes at both ends along the axial direction of the stator core, and each lead wire fixing device is connected to a fixing hole.

[0043] In one possible implementation, the lead wire fixing device includes a fixing post and a lead outlet, the fixing post being inserted into a fixing hole, and the lead outlet allowing the end lead wire to pass through and fixing the end lead wire.

[0044] In one possible implementation, the stator structure includes a stator housing surrounding a stator core, a winding assembly, and a fixing assembly, each fixing assembly abutting against the inner wall of the stator housing.

[0045] In one possible implementation, the inner wall of the stator housing has multiple fixing slots extending axially along the stator core, and each fixing component is at least partially engaged in one fixing slot.

[0046] Secondly, embodiments of this application provide an electric motor, which includes a rotor structure and the aforementioned stator structure, with the stator structure arranged around the rotor structure.

[0047] In one possible implementation, the motor is either a synchronous motor or an asynchronous motor.

[0048] In one possible implementation, the rotor structure is a superconducting rotor.

[0049] In one possible implementation, the rotor structure includes a rotor housing, a rotor shaft, a rotor core, a rotor winding, a first sealing space, and a second sealing space. The rotor housing encloses and forms a receiving space. The rotor shaft is at least partially located within the receiving space. The rotor core is located within the receiving space and surrounds the outside of the rotor shaft. The rotor winding is located within the receiving space and surrounds the outside of the rotor core. The first sealing space is located within the receiving space, surrounds the outside of the rotor shaft, and is used to receive a first refrigerant. The second sealing space is located within the receiving space, surrounds the outside of the first sealing space, and is used to receive a second refrigerant. The rotor core and rotor winding are located within the second sealing space.

[0050] In one possible implementation, the temperature of the first refrigerant is lower than the ambient temperature.

[0051] In one possible implementation, the temperature of the first refrigerant is greater than the temperature of the second refrigerant.

[0052] In one possible implementation, the rotor structure further includes a first inner sealing layer, a first outer sealing layer, and two first end plates. The first outer sealing layer surrounds the outside of the first inner sealing layer. One of the first end plates is connected to one side of the first inner sealing layer along the rotor shaft axis and the other side of the first outer sealing layer along the rotor shaft axis. The other side of the first inner sealing layer and the other side of the first outer sealing layer are connected to the other first end plate. The first inner sealing layer, the first outer sealing layer, and the two first end plates surround each other to form a first sealing space.

[0053] In one possible implementation, the outer surface of the rotor shaft and the outer surface of the first inner sealing layer are defined as the first connecting outer surface, and the inner surface of the first inner sealing layer and the inner surface of the first outer sealing layer are defined as the first connecting inner surface. One of the first connecting inner surface and the first connecting outer surface is provided with multiple tooth structures, and the other is provided with multiple groove structures. Each tooth structure and a groove structure overlap radially along the rotor shaft. The rotor shaft and the first inner sealing layer, as well as the first inner sealing layer and the first outer sealing layer, are connected by the tooth structures and the groove structures.

[0054] In one possible implementation, the thickness of the tooth structure along the rotor axis radially is greater than the thickness of the groove structure along the rotor axis radially, so that a first sealing space is formed between the first inner sealing layer and the first outer sealing layer.

[0055] In one possible implementation, the rotor structure further includes a second inner sealing layer, a second outer sealing layer, and two second end plates. The second outer sealing layer surrounds the outside of the second inner sealing layer. One of the second end plates is connected to one side of the second inner sealing layer along the rotor shaft axis and the other side of the second outer sealing layer along the rotor shaft axis. The other side of the second inner sealing layer and the other side of the second outer sealing layer are connected to the other second end plate. The second inner sealing layer, the second outer sealing layer, and the two second end plates surround to form a second sealing space.

[0056] In one possible implementation, the outer surface of the first outer sealing layer and the outer surface of the second inner sealing layer are defined as the second connecting outer surface, and the inner surface of the second inner sealing layer and the inner surface of the second outer sealing layer are defined as the second connecting inner surface. One of the second connecting inner surface and the second connecting outer surface is provided with a plurality of tooth structures, and the other is provided with a plurality of groove structures. Each tooth structure and a groove structure overlap radially along the rotor shaft. The first outer sealing layer and the second inner sealing layer, as well as the second inner sealing layer and the second outer sealing layer, are connected by tooth structures and groove structures.

[0057] In one possible implementation, the thickness of the tooth structure along the rotor axis radially is greater than the thickness of the groove structure along the rotor axis radially, so that a second sealing space is formed between the second inner sealing layer and the second outer sealing layer.

[0058] In one possible implementation, the first inner sealing layer includes a plurality of first inner sealing portions and a plurality of first inner corrugated portions arranged axially along the rotor shaft, each of the first inner corrugated portions being connected between two adjacent first inner sealing portions.

[0059] In one possible implementation, the first outer sealing layer includes a plurality of first outer sealing portions and a plurality of first outer corrugated portions arranged axially along the rotor shaft, each of the first outer corrugated portions being connected between two adjacent first outer sealing portions.

[0060] In one possible implementation, the second inner sealing layer includes a plurality of second inner sealing portions and a plurality of second inner corrugated portions arranged axially along the rotor shaft, each second inner corrugated portion being connected between two adjacent second inner sealing portions.

[0061] In one possible implementation, the second outer sealing layer includes a plurality of second outer sealing portions and a plurality of second outer corrugated portions arranged axially along the rotor shaft, each second outer corrugated portion being connected between two adjacent second outer sealing portions.

[0062] In one possible implementation, the rotor shaft forms a plurality of shaft fixing holes, the first inner sealing layer forms a plurality of first inner sealing holes penetrating the first inner sealing layer, the first outer sealing layer forms a plurality of first outer sealing holes penetrating the first outer sealing layer, the second inner sealing part forms a plurality of second inner sealing holes penetrating the second inner sealing layer, and the rotor core forms a plurality of core fixing holes penetrating the rotor core. Each shaft fixing hole overlaps with a first inner sealing hole, a first outer sealing hole, a second inner sealing hole, and a core fixing hole along the radial direction of the rotor shaft and communicates with each other to form a fixing channel. The rotor structure also includes multiple fixed columns, each of which is installed in a fixed channel.

[0063] In one possible implementation, each fixed column includes an inner cylinder, a middle cylinder, an outer cylinder, and a filling column. The middle tube includes a middle tube sleeve part and a middle tube fixing part. The middle tube sleeve part is located inside the inner tube, and the middle tube fixing part is located outside the inner tube. The outer cylinder includes an outer cylinder sleeve part and an outer cylinder fixing part. The outer cylinder sleeve part is located inside the middle cylinder, and the outer cylinder fixing part is located outside the middle cylinder. The filling column includes a filling column sleeve and a filling column fixing part. The filling column sleeve is located inside the outer cylinder, and the filling column fixing part is located outside the outer cylinder. At least a portion of the inner cylinder is connected to the first inner sealing layer, the middle cylinder fixing part is connected to the first outer sealing layer, the outer cylinder fixing part is connected to the second inner sealing layer, and the filling column fixing part is located inside the iron core fixing hole.

[0064] In one possible implementation, the inner cylinder is essentially a hollow cylinder sealed at one end, and the filling column sleeve, the outer cylinder sleeve, the middle cylinder sleeve, and the inner cylinder at least partially overlap along the radial direction of the inner cylinder.

[0065] In one possible implementation, the rotor structure further includes a fixing bolt, at least a portion of which is located within and connected to the core fixing hole, and the fixing bolt also abuts against the end of the filler column fixing portion away from the filler column sleeve portion.

[0066] In one possible implementation, the rotor structure further includes a heat insulation layer assembly, which includes at least one of a first heat insulation layer, a second heat insulation layer, and a third heat insulation layer. The first heat insulation layer is located between the rotor shaft and the first inner sealing layer, the second heat insulation layer is located between the first outer sealing layer and the second inner sealing layer, and the third heat insulation layer is located between the first inner sealing layer and the first outer sealing layer.

[0067] In one possible implementation, a first heat-insulating vacuum layer is formed between the rotor shaft and the first heat-insulating layer, and a second heat-insulating vacuum layer is formed between the first outer sealing layer and the second heat-insulating layer.

[0068] In one possible implementation, the outer surface of the rotor shaft, the outer surface of the first heat insulation layer, the outer surface of the first inner sealing layer, the outer surface of the third heat insulation layer, the outer surface of the first outer sealing layer, the outer surface of the second heat insulation layer, and the outer surface of the second inner sealing layer are defined as the third connecting outer surface. The inner surfaces of the first insulation layer, the first inner sealing layer, the third insulation layer, the first outer sealing layer, the second insulation layer, the second inner sealing layer, and the second outer sealing layer are defined as the third connecting inner surface. One of the inner surface and the outer surface of the third connection is provided with multiple convex tooth structures, and the other is provided with multiple groove structures. Each convex tooth structure and a groove structure overlap radially along the rotor shaft. The rotor shaft is connected to the first heat insulation layer, the first heat insulation layer and the first inner sealing layer, the first inner sealing layer and the third heat insulation layer, the third heat insulation layer and the first outer sealing layer, the first outer sealing layer and the second heat insulation layer, the second heat insulation layer and the second inner sealing layer, and the second inner sealing layer and the second outer sealing layer through the convex tooth structure and the groove structure. The thickness of the toothed structure along the rotor axis radially is greater than the thickness of the grooved structure along the rotor axis radially.

[0069] In one possible implementation, the first heat insulation layer includes a plurality of first heat insulation portions distributed along the rotor shaft axial direction, with a gap between adjacent first heat insulation portions; The second heat insulation layer includes multiple second heat insulation portions distributed along the rotor shaft axis, with a gap between adjacent second heat insulation portions; The third insulation layer includes multiple third insulation sections distributed along the rotor shaft axis, with a gap between adjacent third insulation sections.

[0070] In one possible implementation, the first insulation layer forms a plurality of first insulation holes penetrating the first insulation layer, the second insulation layer forms a plurality of second insulation holes penetrating the second insulation layer, and the third insulation layer forms a plurality of third insulation holes penetrating the third insulation layer. Each shaft fixing hole, along with a first heat insulation hole, a first inner sealing hole, a third heat insulation hole, a first outer sealing hole, a second heat insulation hole, a second inner sealing hole, and a core fixing hole, overlaps radially along the rotor shaft and intersects with each other to form a fixing channel.

[0071] In one possible implementation, the rotor housing includes a rotor shell layer and two rotor end plates connected to both sides of the rotor shell layer along the rotor shaft axis.

[0072] In one possible implementation, the rotor shell comprises, from the inside out, a support layer, a shell sealing layer, a shielding layer, and a reinforcing layer, with the two rotor end plates respectively connected to both sides of the shell sealing layer along the rotor shaft axis.

[0073] In one possible implementation, the rotor housing surrounds the outside of the second sealed space and forms a rotor vacuum layer between the first sealed space and the second sealed space.

[0074] In one possible implementation, the support layer is located between the second sealing space and the housing sealing layer.

[0075] In one possible implementation, the support layer has a porous structure, the shielding layer is made of metal, and the reinforcement layer is a fiber-reinforced layer.

[0076] Thirdly, embodiments of this application provide a device that includes the aforementioned motor.

[0077] In one possible implementation, the device is a high-temperature superconducting synchronous condenser, which is used for reactive power compensation in power systems.

[0078] The aforementioned stator structure fixes the fixing component to the stator core, keeping the relative position of the fixing component and the stator core constant. This allows multiple winding assemblies to be pressed together by the fixing component along the circumference of the stator core, thus keeping the relative position of the multiple winding assemblies and the stator core constant along the circumference of the stator core. This prevents the winding assemblies from vibrating along the circumference of the stator core, thereby avoiding wear caused by vibration and improving the service life of the stator structure. Attached Figure Description

[0079] Figure 1 This is a schematic diagram of the stator structure provided in an embodiment of this application.

[0080] Figure 2 This is a schematic diagram of the structure of the first stator core provided in the embodiments of this application.

[0081] Figure 3 An exploded view of the bent section, winding assembly, and first fixing member of the stator structure provided in the embodiments of this application.

[0082] Figure 4 This is a front truncated view of a portion of the stator structure provided in an embodiment of this application.

[0083] Figure 5 This is a schematic diagram of the structure of a second type of stator core provided in the embodiments of this application.

[0084] Figure 6An exploded view of the second type of stator core and winding assembly provided in the embodiments of this application.

[0085] Figure 7 An exploded view of the third type of stator core and winding assembly provided in the embodiments of this application.

[0086] Figure 8 An exploded view of the second stator core, second fixing member, and winding assembly of the stator structure provided in the embodiments of this application.

[0087] Figure 9 This is an assembly drawing of the second stator core and the second fixing member of the stator structure provided in the embodiments of this application.

[0088] Figure 10 This is a schematic diagram of the stator core, fixing assembly, and winding assembly provided in the embodiments of this application.

[0089] Figure 11 An assembly drawing of the bent section, first fixing member, second fixing member, and winding assembly of the stator structure provided in the embodiments of this application.

[0090] Figure 12 An exploded view of the first type of bent segment of the stator structure provided in the embodiments of this application.

[0091] Figure 13 This is a schematic diagram of the stator housing provided in an embodiment of this application.

[0092] Figure 14 An exploded view of the second type of bent section and fixing column of the stator structure provided in the embodiments of this application.

[0093] Figure 15 This is a schematic diagram of the winding module of the stator structure provided in the embodiments of this application.

[0094] Figure 16 A cross-sectional view of the bent section of the stator structure provided in an embodiment of this application.

[0095] Figure 17 A schematic diagram of the first support member and the annular winding of the stator structure provided in the embodiments of this application.

[0096] Figure 18 An exploded view of the first support member and the annular winding of the stator structure provided in the embodiments of this application.

[0097] Figure 19 Examples of this application Figure 11 A magnified view of a portion of point A in the middle.

[0098] Figure 20 Examples of this application Figure 11A magnified view of a section at point B.

[0099] Figure 21 Examples of this application Figure 15 A magnified view of a section at point C.

[0100] Figure 22 A schematic diagram of the structure of the first support member of the stator structure provided in the embodiments of this application.

[0101] Figure 23 A schematic diagram of the structure of the first fixing member of the stator structure provided in the embodiments of this application.

[0102] Figure 24 This is a front view of a portion of the stator structure provided in an embodiment of this application.

[0103] Figure 25 This is a cross-sectional view of the annular winding of the stator structure provided in an embodiment of this application.

[0104] Figure 26 This is a schematic diagram of the second type of stator core, the first fixing member, and the second fixing member provided in the embodiments of this application.

[0105] Figure 27 This is a schematic diagram of the stator lead wire fixing device provided in the embodiment of this application.

[0106] Figure 28 An exploded view of the motor provided in an embodiment of this application.

[0107] Figure 29 A cross-sectional view of the rotor structure provided in an embodiment of this application.

[0108] Figure 30 This is a cross-sectional view of the rotor structure provided in an embodiment of this application from another angle.

[0109] Figure 31 This is an exploded view of some components within the rotor structure provided in an embodiment of this application.

[0110] Figure 32 A cross-sectional view of the fixing column of the rotor structure provided in an embodiment of this application.

[0111] Figure 33 Examples of this application Figure 30 A magnified schematic diagram of the structure at point D.

[0112] Figure 34 Examples of this application Figure 30 A magnified schematic diagram of the structure at point E in the middle. Detailed Implementation

[0113] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0114] It should be noted that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates at least two. "Comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Connected" or "linked" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0115] The singular forms “a,” “the,” and “the” used in this application specification and appended claims may also include one or more, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein describes the relationship between related objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural.

[0116] like Figure 1 and Figure 2 As shown, in one embodiment, the stator structure 600 provided in this application includes a stator core 61, a plurality of winding assemblies 62, and a plurality of fixing assemblies 60. The stator core 61 includes at least two bent sections 610, which are sequentially connected to form a ring-shaped stator core 61. Each winding assembly 62 is sleeved on the stator core 61 along its circumference, thereby enabling the assembly of multiple winding assemblies 62 on the stator core 61. Each fixing assembly 60 is fixedly connected to the stator core 61, and the fixing assemblies 60 are sequentially arranged along the circumference of the stator core 61. At least one winding assembly 62 is disposed between two adjacent fixing assemblies 60, thereby fixing the winding assembly 62 along the circumference of the stator core 61.

[0117] Since the fixing component 60 is fixedly connected to the stator core 61, the relative positions of the fixing component 60 and the stator core 61 remain fixed. Therefore, through the above arrangement, each winding component 62 can be pressed against the stator core 61 circumferentially by the fixing component 60, thus maintaining a fixed relative position of the multiple winding components 62 and the stator core 61 circumferentially. Furthermore, since the current in the multiple winding components 62 generates electromagnetic force under the influence of a magnetic field, if the position of the winding components 62 is not restricted, the winding components 62 will vibrate circumferentially around the stator core 61 after being subjected to electromagnetic force, resulting in wear due to this vibration. Therefore, in this application, the relative positions of the multiple winding assemblies 62 and the stator core 61 along the circumference of the stator core 61 are kept fixed by the fixing component 60 to avoid wear caused by vibration of the winding assemblies 62 along the circumference of the stator core 61, thereby improving the service life of the stator structure 600.

[0118] like Figure 2 and Figure 3 As shown, in one embodiment, the fixing component 60 includes a first fixing member 63, which is annular and sleeved on the stator core 61 circumferentially. The first fixing member 63 is fixedly connected to the stator core 61. In this configuration, since the winding assembly 62 of this application is substantially annular, the annular first fixing member 63 increases the contact area with the winding assembly 62 along the circumference of the stator core 61, thereby allowing the first fixing member 63 to better abut against the winding assembly 62. Furthermore, the annular shape of the first fixing member 63 also facilitates its sleeved placement on the stator core 61, preventing the first fixing member 63 from detaching from the stator core 61.

[0119] In some embodiments, the first fixing member 63 is fixedly connected to the stator core 61 at least on one side radially along the stator core 61, and / or the first fixing member 63 is fixedly connected to the stator core 61 at least on one side axially along the stator core 61. That is, in this application, the connection position between the first fixing member 63 and the stator core 61 can be arbitrary, as long as the first fixing member 63 and the stator core 61 can be fixedly connected.

[0120] In some embodiments, the connection between the first fixing member 63 and the stator core 61 can be by bonding, for example by bonding with epoxy resin.

[0121] like Figure 3 and Figure 4As shown, in this embodiment, a gap 602 is formed between two adjacent winding assemblies 62, and a first fixing member 63 is located within the gap 602 and connected to the two winding assemblies 62 corresponding to the gap 602. In one embodiment, a first fixing member 63 is provided between any two adjacent winding assemblies 62, so that any two adjacent winding assemblies 62 can be fixed by the first fixing member 63. This facilitates that both ends of each winding assembly 62 along the circumferential direction of the stator core 61 can be fixed by the first fixing member 63, thereby improving the fixing stability of multiple winding assemblies 62 on the stator core 61, further avoiding vibration of the winding assemblies 62, and further improving the service life of the stator structure 600.

[0122] In some embodiments, the first fixing member 63 is connected to a winding assembly 62 on both sides of the stator core 61 in the circumferential direction, thereby further improving the fixing effect of the winding assembly 62 by connecting the first fixing member 63 to abut against multiple winding assemblies 62.

[0123] In some embodiments, the stator structure 600 is a two-pole three-phase alternating stator structure, in which three bending sections 610 are provided, six winding assemblies 62 are provided, and six first fixing members 63 are also provided. The six winding assemblies 62 are two A-phase windings, two B-phase windings, and two C-phase windings. The two A-phase windings are symmetrically arranged about the center of the stator core 61 and fitted onto different bending sections 610, the two B-phase windings are symmetrically arranged about the center of the stator core 61 and fitted onto different bending sections 610, and the two C-phase windings are symmetrically arranged about the center of the stator core 61 and fitted onto different bending sections 610. Each first fixing member 63 has winding assemblies 62 of different phases fitted onto both sides of the stator core 61 circumferentially. With this configuration, the first fixing member 63 can separate the winding components 62 of different phases, so as to avoid the winding components 62 of different phases being too close in space or lacking effective electromagnetic isolation, thereby avoiding electromagnetic interference between the winding components 62 of different phases, which is conducive to the normal operation of the stator structure 600.

[0124] In another embodiment, the stator structure 600 is a 4-pole three-phase alternating stator structure. In this case, there are six bending sections 610, twelve winding assemblies 62, and twelve first fixing members 63. The twelve winding assemblies 62 are four A-phase windings, four B-phase windings, and four C-phase windings. The four A-phase windings are fitted onto different bending sections 610, the four B-phase windings are fitted onto different bending sections 610, and the four C-phase windings are fitted onto different bending sections 610. The twelve winding assemblies 62 are arranged in the following order: A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding. Specifically, the first bending section 610 has the first A-phase winding and the first B-phase winding respectively mounted on both sides of the stator core 61 circumferentially; the second bending section 610 has the first C-phase winding and the second A-phase winding respectively mounted on both sides of the stator core 61 circumferentially; the third... The second B-phase winding and the second C-phase winding are respectively fitted on both sides of the stator core 61 along the circumference of the fourth bending section 610. The third A-phase winding and the third B-phase winding are respectively fitted on both sides of the stator core 61 along the circumference of the fifth bending section 610. The fourth B-phase winding and the fourth C-phase winding are respectively fitted on both sides of the stator core 61 along the circumference of the sixth bending section 610. The fourth B-phase winding and the fourth C-phase winding are respectively fitted on both sides of the stator core 61 along the circumference of the sixth bending section 610. Each first fixing member 63 has a winding assembly 62 of different phases fitted on both sides of the stator core 61 along the circumference of the stator core 61, that is, a first fixing member 63 is provided between two adjacent winding assemblies 62.

[0125] In another embodiment, the stator structure 600 is a 6-pole three-phase alternating stator structure. In this case, there are nine bending sections 610, eighteen winding assemblies 62, and eighteen first fixing members 63. Among them, the eighteen winding assemblies 62 are six A-phase windings, six B-phase windings, and six C-phase windings. The six A-phase windings are fitted onto different bending sections 610, the six B-phase windings are fitted onto different bending sections 610, and the six C-phase windings are fitted onto different bending sections 610. The eighteen winding assemblies 62 are arranged in the following order: A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding, A-phase winding, B-phase winding, C-phase winding. Specifically, the first bending section 610 has the first A-phase winding and the first B-phase winding respectively mounted on both sides of the stator core 61 circumferentially; the second bending section 610 has the first C-phase winding and the second A-phase winding respectively mounted on both sides of the stator core 61 circumferentially; the third bending section 610 has the second B-phase winding and the second C-phase winding respectively mounted on both sides of the stator core 61 circumferentially; and the fourth bending section 610... A third A-phase winding and a third B-phase winding are respectively wound on both sides of the stator core 61 circumferentially. A third C-phase winding and a fourth A-phase winding are respectively wound on both sides of the stator core 61 circumferentially. A fourth B-phase winding and a fourth C-phase winding are respectively wound on both sides of the stator core 61 circumferentially. A fifth A-phase winding and a fifth B-phase winding are respectively wound on both sides of the stator core 61 circumferentially. A fifth C-phase winding and a sixth A-phase winding are respectively wound on both sides of the stator core 61 circumferentially. A sixth B-phase winding and a sixth C-phase winding are respectively wound on both sides of the stator core 61 circumferentially. Each first fixing member 63 is fitted with a winding assembly 62 of different phases on both sides of the stator core 61 circumferentially, that is, a first fixing member 63 is provided between two adjacent winding assemblies 62.

[0126] It should be noted that the stator structure 600 of this application can also be a three-phase alternating stator structure with other pole numbers, and this application does not impose any restrictions on this.

[0127] like Figure 5 and Figure 6 As shown, based on any of the above embodiments or examples, as another embodiment, the fixing component 60 includes a support portion 611, which is formed on the outer diameter surface of the stator core 61, so that the support portion 611 can abut against a plurality of winding components 62, so that the plurality of winding components 62 are fixed by the support portion 611 at a position along the circumference of the stator core 61, so as to avoid vibration of the plurality of winding components 62 and reduce the service life of the plurality of winding components 62.

[0128] It should be noted that the support portion 611 can also be formed on the inner diameter surface of the stator core 61, as long as the support portion 611 can abut against the multiple winding assemblies 62. This application does not limit the location of the support portion 611.

[0129] In some embodiments, each bent segment 610 is provided with a support portion 611, such that there are multiple support portions 611 arranged sequentially along the circumference of the stator core 61, so that at least one winding assembly 62 is provided between two adjacent support portions 611, thereby facilitating that multiple winding assemblies 62 can be fixed by different support portions 611 respectively, which in turn facilitates the fixing of the winding assembly 62 in the circumferential direction of the stator core 61.

[0130] In one embodiment, the support portion 611 is located at the middle of the circumferential direction of the bent section 610. Taking the stator structure 600 as a two-pole three-phase alternating stator structure as an example, each bent section 610 is fitted with two winding assemblies 62 of different phases. By placing the support portion 611 at the middle of the bent section 610, the two winding assemblies 62 of different phases on the same bent section 610 can be isolated by the support portion 611. While fixing the two winding assemblies 62 in the circumferential direction of the stator core 61 by the support portion 611, the support portion 611 can prevent electromagnetic interference between the winding assemblies 62 of different phases, thereby facilitating the normal operation of the stator structure 600.

[0131] In other embodiments, the support portion 611 may also be located at any position from the middle to the edge of the curved section 610 along its circumference, as long as the support portion 611 can provide positional fixation for the multiple winding assemblies 62 in the circumferential direction of the stator core 61. This application does not impose any restrictions on this.

[0132] like Figure 7 As shown, in some embodiments, each curved segment 610 is provided with multiple support portions 611, which are arranged along the axial direction of the curved segment 610. Adjacent support portions 611 are spaced apart along the axial direction of the curved segment 610. This arrangement eliminates the need for a support portion 611 with an axial length on the curved segment 610, thereby reducing the volume of the support portion 611 and achieving weight reduction for both the support portion 611 and the curved segment 610, without affecting the fixing function of the support portion 611 for the multiple winding assemblies 62.

[0133] In one embodiment, multiple support portions 611 are located at the center of the curved section 610 along its circumference. The beneficial effects of the above arrangement are the same as the beneficial effects of providing a support portion 611 at the center of the curved section 610 along its circumference, and will not be repeated here.

[0134] In another embodiment, the plurality of support portions 611 may be located at any position from the middle to the edge of the curved section 610 along its circumference, as long as the plurality of support portions 611 are arranged along the axial direction of the curved section 610 and can provide a position fixing function for the plurality of winding assemblies 62 in the circumferential direction of the stator core 61. This application does not limit this.

[0135] In some embodiments, the support portion 611 is integrally formed with the stator core 61, thereby improving the connection strength between the support portion 611 and the stator core 61, and thus improving the fixing effect of the support portion 611 on the multiple winding assemblies 62.

[0136] Understandably, the support portion 611 can also be fixedly connected to the stator core 61. For example, the support portion 611 can be bonded to the stator core 61 using epoxy resin or the like. This application does not limit the connection method between the support portion 611 and the stator core 61.

[0137] like Figure 8 and Figure 9 As shown, in one implementation, when the fixing component 60 includes a support portion 611, the fixing component 60 also includes a second fixing member 64. The second fixing member 64 is fixedly connected to the support portion 611 to form an annular structure 601, and a portion of the stator core 61 along its circumference is located within the annular structure 601. In the above configuration, since the winding component 62 of this application is basically annular, the annular structure 601 can increase the contact area with the winding component 62 along the circumference of the stator core 61, thereby allowing the annular structure 601 to better abut against the winding component 62. Secondly, the annular structure 601 also facilitates its fitting onto the stator core 61, thereby preventing the second fixing member 64 from detaching from the stator core 61. Furthermore, since the support portion 611 is only formed on the outer or inner diameter surface of the stator core 61, and since the winding assembly 62 of this application is basically annular, electromagnetic interference may occur between the two winding assemblies 62 on both sides of the stator core 61 circumferentially where the support portion 611 is not provided, thereby affecting the normal operation of the winding assembly 62. Therefore, this application can form an annular structure 601 with the support portion 611 through the second fixing member 64, thereby isolating the annular winding assemblies 62 by the annular structure 601, and thus avoiding electromagnetic interference between the two winding assemblies 62 on both sides of the stator core 61 circumferentially where the support portion 611 is provided.

[0138] In some embodiments, the second fastener 64 is bonded to the support portion 611, for example, by bonding the second fastener 64 to the support portion 611 with epoxy resin or the like. Specifically, this application does not limit the method of fixing the second fastener 64 to the support portion 611.

[0139] In one embodiment, the second fixing member 64 includes a first fixing part 641, a second fixing part 642, and a connecting part 643. One end of the first fixing part 641 and one end of the second fixing part 642 are connected by the connecting part 643. The other end of the first fixing part 641 is connected to one side of the support part 611 along the axial direction of the curved section 610, and the other end of the second fixing part 642 is connected to the other side of the support part 611 along the axial direction of the curved section 610, so that the second fixing member 64 can cooperate with the support part 611 to form a ring structure 601.

[0140] The first fixing part 641 and the second fixing part 642 are respectively connected to the two winding assemblies 62 on both sides of the support part 611, so that while the annular structure 601 abuts against the multiple winding assemblies 62, the second fixing member 64 can be connected to the two winding assemblies 62 on both sides of the support part 611, so as to further improve the fixing effect of the second fixing member 64 on the multiple winding assemblies 62.

[0141] The description will take the example of a support portion 611 formed on the outer diameter surface of the stator core 61. The first fixing portion 641, near one end of the stator core 61 axis, and the second fixing portion 642, near one end of the stator core 61 axis, are connected by a connecting portion 643. The other ends of the first fixing portion 641 and the second fixing portion 642 are also connected to the support portion 611 on both sides along the axial direction of the stator core 61, respectively, to prevent the support portion 611 from interfering with the assembly of the second fixing member 64.

[0142] like Figure 10 and Figure 11 As shown, in some embodiments, the fixing component 60 may simultaneously include a first fixing member 63 and a support portion 611. The first fixing member 63 is annular and sleeved on the stator core 61 circumferentially, and the support portion 611 and the first fixing member 63 are arranged at intervals along the circumferential direction of the stator core 61. With the above arrangement, multiple winding components 62 can be simultaneously fixed by the first fixing member 63 and the support portion 611.

[0143] At least one winding assembly 62 is provided between adjacent support portions 611 and the first fixing member 63. Taking a two-pole three-phase alternating stator structure 600 as an example, since two adjacent winding assemblies 62 are of different phases, the above arrangement allows for the provision of a support portion 611 or a first fixing member 63 between two adjacent winding assemblies 62 of different phases. This isolates the two adjacent winding assemblies 62 from electromagnetic interference, thereby improving their operational stability.

[0144] In one embodiment, two winding assemblies 62 with different phases are provided between adjacent support portions 611, and the gap 602 between the two winding assemblies 62 with different phases (see reference) Figure 4 The device is provided with a first fixing member 63, so that the fixing component 60 and the winding component 62 of this application are arranged in a cycle in the manner of support 611, one winding component 62, first fixing member 63, another winding component 62, and support 611.

[0145] In one embodiment, when the fixing component 60 includes both the first fixing member 63 and the support portion 611, the fixing component 60 may also include a second fixing member 64, thereby forming a ring structure 601 with the second fixing member 64 and the support portion 611.

[0146] With the above arrangement, along the circumference of the stator core 61, each winding assembly 62 can be pressed against both sides by the first fixing member 63 and the support part 611 respectively. Specifically, one side of each winding assembly 62 is pressed against the annular structure 601 formed by the cooperation of the second fixing member 64 and the support part 611, and the other side of each winding assembly 62 is pressed against the first fixing member 63, so that the multiple winding assemblies 62, the annular structure 601 and the first fixing member 63 are tightly connected, thereby preventing the winding assembly 62 from vibrating after being subjected to electromagnetic force, and thus improving the service life of the stator structure 600.

[0147] Secondly, in this application, a cooling medium flows within the stator structure 600, and the cooling medium permeates the stator core 61 and the plurality of winding assemblies 62 to cool the stator core 61 and the plurality of winding assemblies 62. Exemplarily, the cooling medium can be air.

[0148] It should be noted that if the cooling medium is cooling oil, components such as an oil pump and oil pipes need to be installed inside the stator structure 600, which increases the structural complexity of the stator structure 600 and the assembly difficulty of the stator structure 600. However, if air circulates inside the stator structure 600, only an external fan needs to be installed on the stator structure 600, which simplifies the stator structure 600, reduces the assembly difficulty of the stator structure 600, and improves the assembly efficiency of the stator structure 600.

[0149] When air circulates within the stator structure 600, in order to avoid air corona caused by air cooling, both the first fixing member 63 and the second fixing member 64 of this application are made of non-magnetic materials. That is, the first fixing member 63 and the second fixing member 64 are made of insulating materials. The insulating materials can make the electric field intensity generated by the winding assembly 62 uniform, which is beneficial to reducing the maximum electric field intensity within the stator structure 600, thereby avoiding air corona caused by excessive electric field intensity within the stator structure 600, and further improving the service life of the stator structure 600.

[0150] like Figure 12 As shown, in one implementation, adjacent bending segments 610 are interlocked. It is understood that adjacent bending segments 610 can also be connected by means of bonding, etc., and this application does not impose any restrictions.

[0151] like Figure 10 and Figure 13 As shown, in some embodiments, the stator structure 600 includes a stator housing 68, which surrounds the stator core 61 and a plurality of winding assemblies 62. Specifically, each support portion 611 abuts against the inner wall of the stator housing 68 to facilitate the assembly of the stator housing 68 with the stator core 61.

[0152] In one embodiment, the inner wall of the stator housing 68 is provided with a plurality of fixing grooves 681 extending axially along the stator core 61. A first fixing member 63 is at least partially engaged in the fixing groove 681, and a support portion 611 is at least partially engaged in the fixing groove 681. The lengths of the fixing grooves 681, the first fixing member 63, and the support portion 611 and the second fixing member 64 along the axial direction of the stator core 61 are all substantially the same. This arrangement restricts the movement of the stator core 61 within the stator housing 68, thereby improving the structural stability of the stator structure 600. Furthermore, the fixing grooves 681 prevent unstable connections between adjacent bent sections 610 caused by insertion, thus preventing misalignment between adjacent bent sections 610 along the axial direction of the stator core 611, further improving the structural stability of the stator structure 600.

[0153] It should be noted that in this application, the relative position of the stator core 61 and the stator housing 68 can be fixed only by the snap-fit ​​between the fixing groove 681 and the support part 611, and the fixing groove 681 and the first fixing member 63. Furthermore, there is no need to set a connection between adjacent bending sections 610, as long as the adjacent bending sections 610 are kept in contact.

[0154] like Figure 12 As shown in the figure, this application uses the example of interlocking between adjacent curved sections 610 for illustration.

[0155] In some embodiments, one end of any bent segment 610 has a connecting protrusion 612, and the other end has a connecting groove 613. Adjacent bent segments 610 are connected by the connecting protrusion 612 and the connecting groove 613. The connecting protrusion 612 and the connecting groove 613 are located at opposite ends of the same bent segment 610 along its circumference. In this embodiment, the shapes of each bent segment 610 can be identical, thus allowing the same mold to be used to manufacture each bent segment 610, which is beneficial for cost reduction. It is understood that in other embodiments, some bent segments 610 may have connecting protrusions 612 at both ends and connecting grooves 613 at both ends, as long as one end of each pair of adjacent bent segments 610 has a connecting protrusion 612 and the other end has a connecting groove 613, thereby enabling the connection of adjacent bent segments 610.

[0156] In some embodiments, taking a two-pole three-phase alternating stator structure 600 as an example, three bending sections 610 are provided. The first bending section 610 has connecting grooves 613 at both ends; the second bending section 610 has connecting protrusions 612 at both ends; and the third bending section 610 has a connecting protrusion 612 at one end and a connecting groove 613 at the other end. That is, this application does not limit the arrangement of the connecting grooves 613 and connecting protrusions 612 in the bending sections 610, as long as the bending sections 610 can be interlocked.

[0157] like Figure 14 As shown, in one implementation, both ends of the bent section 610 along its circumference are formed with arc-shaped grooves 6101. The stator structure 600 also includes a fixing post 69, which is inserted into the arc-shaped grooves 6101 of two adjacent bent sections 610, so that the two adjacent bent sections 610 are connected. That is, this application does not limit the connection method between the bent sections 610.

[0158] like Figure 15 and Figure 16As shown, in one embodiment, each winding assembly 62 includes multiple mutually abutting winding modules 621. Each winding module 621 includes an annular winding 6211 and a support assembly 6212. A high-voltage current flows through the annular winding 6211 to generate an induced magnetic field. The support assembly 6212 supports the annular winding 6211, i.e., the annular winding 6211 is fixed around the support assembly 6212. The support assembly 6212 has a mounting opening 6212x. The support assembly 6212 is sleeved onto the stator core 61 circumferentially through the mounting opening 6212x, and the shape of the mounting opening 6212x matches the shape of the circumferential cross-section 61a of the stator core 61, so that the winding assembly 62 is fixed axially and radially along the stator core 61. With the above settings, the winding assembly 62 can be fixed along the circumferential, axial and radial directions of the stator core 61 by the support assembly 6212 in conjunction with the fixing assembly 60, thereby further preventing the winding assembly 62 from vibrating and improving the service life of the stator structure 600.

[0159] Here, a cross-sectional plane 101 is defined that passes through the axis of the stator core 61 and is parallel to the radial direction of the stator core 61. The circumferential section 61a of the stator core 61 is the section of the stator core 61 cut by the cross-sectional plane 101.

[0160] In one embodiment, the support assembly 6212 includes a first support member 6212a and a second support member 6212b. An annular winding 6211 is fixed between the first support member 6212a and the second support member 6212b, and both the first support member 6212a and the second support member 6212b are sleeved on the stator core 61 circumferentially.

[0161] In this application, the structure of the second support member 6212b is identical to that of the first support member 6212a and is a mirror image of each other. This arrangement, with its separate first and second support members 6212a and 6212b, facilitates the assembly of the annular winding 6211 within the support assembly 6212, thereby securing the annular winding 6211 and further preventing circumferential vibration of the annular winding 6211 along the stator core 61.

[0162] In some embodiments, after the annular winding 6211 is assembled to the support assembly 6212, the first support member 6212a and the second support member 6212b are wrapped with mica insulating tape to fix the winding module 621.

[0163] It should be noted that this application describes the first support member 6212a as an example, and the structure of the second support member 6212b will not be described in detail.

[0164] like Figure 17 and Figure 18As shown, in one embodiment, the first support member 6212a has a rectangular protrusion 6212c and two linear protrusions 6212d extending axially along the stator core 61. The two linear protrusions 6212d are located on opposite sides of the rectangular protrusion 6212c along the radial direction of the stator core 61. The annular winding 6211 is wound around the rectangular protrusion 6212c and abuts against the two linear protrusions 6212d. This arrangement allows the annular winding 6211 to be fixed by the rectangular protrusion 6212c and the linear protrusions 6212d, thereby facilitating the fixation of the annular winding 6211 to the support assembly 6212.

[0165] In one embodiment, the rectangular protrusion 6212c forms a through-hole 6212q for the stator core 61 to pass through, and the through-hole 6212q forms at least a portion of the mounting opening 6212x (see reference). Figure 15 This facilitates the assembly of the first support member 6212a onto the stator core 61.

[0166] In some embodiments, the annular winding 6211 includes two straight segments 6211a and two ends 6211b. The two straight segments 6211a are radially distributed along the stator core 61, and the two ends 6211b are axially distributed along the stator core 61. One end of each of the two straight segments 6211a is connected via one end 6211b, and the other end of each of the two straight segments 6211a is connected via the other end 6211b.

[0167] In this embodiment, both linear protrusions 6212d abut against the annular winding 6211. Specifically, the two linear protrusions 6212d abut against the two straight segments 6211a respectively. Along the radial direction of the stator core 61, the rectangular protrusion 6212c and the linear protrusions 6212d can be pressed against the two ends of the straight segments 6211a, thereby fixing the annular winding 6211.

[0168] like Figure 18 , Figure 19 and Figure 20 As shown, in one embodiment, the first support member 6212a located on one side of the stator core 61 circumferentially is defined as the first side support member, and the second support member 6212b located on the other side of the stator core 61 circumferentially is defined as the second side support member.

[0169] The first and second side supports are provided with snap-fit ​​grooves 6212e on both sides along the axial direction of the stator core 61. Each fixing component 60 has a snap-fit ​​structure 631. The two fixing components 60 on both sides of the winding assembly 62 along the circumference of the stator core 61 are defined as the first fixing component 60a and the second fixing component 60b. The first side support and the first fixing component 60a are connected to the snap-fit ​​grooves 6212e through the snap-fit ​​structure 631, and the second side support and the second fixing component 60b are connected to the snap-fit ​​grooves 6212e through the snap-fit ​​structure 631. With the above arrangement, the winding assembly 62 can be snapped into the fixing component 60 through the snap-fit ​​grooves 6212e, thereby improving the fixing effect of the fixing component 60 on the winding assembly 62.

[0170] It should be noted that in the same winding assembly 62, one of the second support members 6212b may be connected to the first fixing assembly 60a, and one of the first support members 6212a may be connected to the second fixing assembly 60b. The only difference is that the first support members 6212a and the second support members 6212b of the winding assembly 62 are connected in different ways because each winding assembly 62 is located at a different position on the stator core 61.

[0171] It should be noted that this application uses the example of a first support member 6212a connected to a first fixing component 60a and a second support member 6212b connected to a second fixing component 60b for illustration.

[0172] like Figure 20 and Figure 21 As shown, in this application, in the same winding assembly 62, two adjacent toroidal windings 6211 are connected by a terminal block 6213. That is, the toroidal windings 6211 in the winding assembly 62 of the same phase are electrically connected by the terminal block 6213.

[0173] In this embodiment, the first support member 6212a and the second support member 6212b, which are not connected to the fixing assembly 60, are defined as third-side support members. The third-side support members have grooves 6210 on both sides along the axial direction of the stator core 61, allowing the wiring segment 6213 to pass through. With this configuration, the first support member 6212a and the first fixing assembly 60a (see reference...) Figure 19When the first support member 6212a and the second fixing component 60a are adjacent, the snap-fit ​​groove 6212e snaps into the snap-fit ​​structure 631 of the first fixing component 60a, thereby fixing the first support member 6212a and the first fixing component 60a. When the second support member 6212b and the second fixing component 60b are adjacent, the snap-fit ​​groove 6212e snaps into the snap-fit ​​structure 631 of the second fixing component 60b, thereby fixing the second support member 6212b and the second fixing component 60b. When the first support member 6212a and the second support member 6212b are adjacent to the winding module 621, the wire groove 6210 can provide space for the wiring segment 6213 to pass through, which is conducive to the connection between the toroidal windings 6211 in different winding modules 621.

[0174] It should be noted that in this application, the wire groove 6210 and the snap-fit ​​groove 6212e are of the same structure, and their functions differ only due to the different positions of the first support member 6212a and the second support member 6212b. This arrangement avoids the increased processing difficulty caused by the different structures of the wire groove 6210 and snap-fit ​​groove 6212e in each first support member 6212a and each second support member 6212b.

[0175] like Figure 22 and Figure 23 As shown, in one embodiment, the first side support and the second side support are formed with chamfered structures 6212f extending axially along the stator core 61. The chamfered structures 6212f are located on the side of the first side support and the second side support closer to the axis of the stator core 61. Specifically, both the first fixing assembly 60a and the second fixing assembly 60b are formed with protruding structures 632, each protruding structure 632 engaging with a corresponding chamfered structure 6212f. This arrangement restricts the relative movement of the fixing assembly 60 and the winding assembly 62 in the radial direction of the stator core 61, thereby improving the connection stability of the fixing assembly 60 and the winding assembly 62.

[0176] It should be noted that the third-side support member can also have the same chamfer as the chamfered structure 6212f, thus eliminating the need to process two different first support members 6212a and two different second support members 6212b, thereby reducing the processing difficulty of the first support members 6212a and the second support members 6212b. Furthermore, the third-side support member can replace the first and second side support members, allowing the winding assembly 62 to be assembled on the stator core 61 without distinguishing between the first and second side support members, thereby improving the assembly convenience of the stator structure 600.

[0177] like Figure 22 As shown, in one embodiment, the first support member 6212a is formed for fixing the two ends 6211b respectively (see reference). Figure 18The two clamping protrusions 6212g of the second support member 6212b are located on both sides of the rectangular protrusion 6212c along the axial direction of the stator core 61. Along the circumference of the stator core 61, the clamping protrusions of the second support member 6212b and the clamping protrusions 6212g are located on both sides of the end 6211b along the circumference of the stator core 61.

[0178] It should be noted that, through the above arrangement, the first support member 6212a will not block the side wall of the end 6211b along the axial direction of the stator core 61, so that the end 6211b can be exposed to the cooling medium, thereby increasing the contact area between the cooling medium and the annular winding 6211, and thus improving the cooling effect of the cooling medium on the annular winding 6211.

[0179] In one implementation, each clamping protrusion 6212g has at least one notch 6212h, which gives each clamping protrusion 6212g a toothed structure. The notch 6212h can be filled with a cooling medium, i.e., air can be filled inside the notch 6212h. Since the dielectric constant of a gas is smaller than that of a solid, the smaller the dielectric constant, the lower the probability of gas corona. Therefore, by creating the notch 6212h and filling it with air, the overall dielectric constant of the clamping protrusion 6212g can be reduced, which helps to avoid air corona.

[0180] Secondly, the notch 6212h is filled with cooling medium, which can also cool the end 6211b, thereby further increasing the contact area between the cooling medium and the annular winding 6211, and further improving the cooling effect of the cooling medium on the annular winding 6211.

[0181] like Figure 24 As shown, in one embodiment, the stator structure 600 further includes a phase-to-phase jumper 65 and a grounding wire 66. The phase-to-phase jumper 65 is used to connect two winding assemblies 62 of the same phase. Each winding assembly 62 is connected to the grounding wire 66 to improve the operational safety of the stator structure 600.

[0182] In one embodiment, reference is made to Figure 22 and Figure 24 The first support member 6212a extends along the axial direction of the stator core 61 to form two extension plates 6212i, which are located on both sides of the first support member 6212a along the axial direction of the stator core 61. The extension plates 6212i are used to support the phase-to-phase jumper 65 and the grounding wire 66.

[0183] In one embodiment, the extension plate 6212i has a grounding fixing groove 6212j and an interphase fixing groove 6212k. The grounding fixing groove 6212j is located on the side of the extension plate 6212i away from the axis of the stator core 61, and the grounding wire 66 is at least partially engaged within the grounding fixing groove 6212j. The interphase fixing groove 6212k is located on the side of the extension plate 6212i closer to the axis of the stator core 61, and the interphase jumper wire 65 is at least partially engaged within the interphase fixing groove 6212k.

[0184] With the above settings, the grounding fixing slot 6212j can limit the grounding wire 66, and the phase-to-phase fixing slot 6212k can limit the phase-to-phase jumper wire 65, thereby restricting the movement of the phase-to-phase jumper wire 65 and the grounding wire 66 to avoid the phase-to-phase jumper wire 65 and the grounding wire 66 from crossing and overlapping. This prevents the current flowing in the phase-to-phase jumper wire 65 and the grounding wire 66 from having a high electric field intensity at the crossing and overlapping points, which is beneficial to improving the uniformity of the internal electric field of the stator structure 600, avoiding the generation of air corona, and thus improving the service life of the stator structure 600.

[0185] In this embodiment, along the radial direction of the stator core 61, the grounding fixing slot 6212j and the phase fixing slot 6212k are located on both sides of the snap-fit ​​slot 6212e, which helps to increase the spacing between the phase-to-phase jumper wire 65 and the grounding wire 66, thereby improving the uniformity of the internal electric field of the stator structure 600.

[0186] In one implementation, each first support member 6212a is provided with two interphase fixing slots 6212k, which are distributed radially along the stator core 61. Since the two winding assemblies 62 of the same phase are symmetrically distributed, the two interphase jumpers 65 of the winding assemblies 62 of different phases will overlap radially in the stator core 61. Therefore, by providing two interphase fixing slots 6212k, the two interphase jumpers 65 can be respectively limited to avoid them crossing and overlapping, thereby preventing the electric field generated by the current in the interphase jumpers 65 from being too strong at the crossing and overlapping points, further improving the uniformity of the internal electric field of the stator structure 600.

[0187] like Figure 22 , Figure 23 and Figure 24 As shown, in one embodiment, each fixing component 60 has a grounding groove 603 formed on both sides along the axial direction of the stator core 61. The grounding groove 603 cooperates with the grounding fixing groove 6212j to fix at least part of the grounding wire 66, so as to facilitate the grounding wire 66 to pass through the fixing component 60, and further improve the limiting stability of the grounding wire 66 through the grounding groove 603.

[0188] Each fixing component 60 has a phase-to-phase slot 604 formed on both sides along the axial direction of the stator core 61. The phase-to-phase slot 604 cooperates with the phase-to-phase fixing slot 6212k to fix at least part of the phase-to-phase jumper wire 65, so as to facilitate the phase-to-phase jumper wire 65 to pass through the fixing component 60, and further improve the limiting stability of the phase-to-phase jumper wire 65 through the phase-to-phase slot 604.

[0189] like Figure 22 As shown, in one embodiment, a winding slot 6212m is formed between the linear protrusion 6212d and the rectangular protrusion 6212c, and the winding slot 6212m can accommodate at least a portion of the annular winding 6211. Specifically, at least one cooling channel 6212n capable of being filled with cooling medium is formed on the side wall of the winding slot 6212m, and the two ends of the cooling channel 6212n are respectively connected to the two side surfaces of the first support member 6212a along the axial direction of the stator core 61. This arrangement allows the cooling medium to contact the straight segment 6211a of the annular winding 6211 through the cooling channel 6212n, further increasing the contact area between the cooling medium and the annular winding 6211, thereby improving the cooling effect of the cooling medium on the annular winding 6211.

[0190] In one implementation, the maximum length of the cooling channel 6212n along the axial direction of the stator core 61 is less than or equal to the minimum distance between the two ends 6211b of the annular winding 6211 along the axial direction of the stator core 61. Because the ends 6211b (refer to...) Figure 18 The end 6211b is bent to create a curved arc surface. This design prevents the cooling channel 6212n from extending to the arc surface of the end 6211b, thus avoiding the formation of a small air gap between the cooling channel 6212n and the arc surface. This prevents the formation of a large electric field intensity in the air gap, improving the uniformity of the electric field intensity within the stator structure 600 and helping to avoid air corona discharge.

[0191] like Figure 22 As shown, in one embodiment, a cooling groove 6212p for the cooling medium to circulate is formed on the surface of the first support member 6212a away from the axis of the stator core 61. This arrangement increases the contact area between the cooling medium and the first support member 6212a, thereby improving the cooling effect of the cooling medium on the first support member 6212a. Secondly, since the dielectric constant of a gas is smaller than that of a solid, the lower the dielectric constant, the lower the probability of gas corona. Therefore, by forming the cooling groove 6212p for the cooling medium to circulate, wherein the cooling medium is air, the overall dielectric constant of the first support member 6212a can be reduced, which helps to avoid air corona.

[0192] like Figure 25As shown, in one embodiment, the toroidal winding 6211 includes a multi-turn coil 6211c, an inter-turn insulation portion 6211d, an insulation layer 6211e, a filler layer 6211f, and a high-resistance anti-corona layer 6211g. The coil 6211c is used to carry high-voltage current.

[0193] In one embodiment, an inter-turn insulation portion 6211d is provided between each two adjacent turns of coil 6211c. In some embodiments, the inter-turn insulation portion 6211d is a thin film insulating material, so as to achieve insulation between adjacent turns of coil 6211c while reducing the volume of the annular winding 6211. Exemplarily, the inter-turn insulation portion 6211d is a polyimide film.

[0194] The insulating layer 6211e wraps around the multi-turn coil 6211c and the inter-turn insulation portion 6211d to improve the insulation performance of the coil 6211c, thereby improving the uniformity of the electric field intensity generated by the current in the coil 6211c to avoid air corona discharge. For example, the insulating layer 6211e is a mica insulating layer.

[0195] The filler layer 6211f fills the gaps between the insulating layer 6211e and the multi-turn coil 6211c, as well as the gaps between the insulating layer 6211e and the inter-turn insulation portion 6211d. The filler layer 6211f is made of insulating material. This configuration prevents air gaps inside the toroidal winding 6211 from causing air corona discharge, thereby improving the service life of the toroidal winding 6211. For example, the filler layer 6211f is epoxy resin.

[0196] A high-resistance anti-corona layer 6211g is wrapped around the insulating layer 6211e. The high-resistance anti-corona layer 6211g can further optimize the uniformity of the electric field intensity generated by the current in the coil 6211c, thereby further avoiding the generation of air corona. For example, the high-resistance anti-corona layer 6211g is a silicon carbide composite material.

[0197] like Figure 26 As shown, in one embodiment, when the fixing assembly 60 includes both a first fixing member 63 and a support portion 611, since the support portion 611 is fixedly connected to or integrally formed with the stator core 61, the portion of the first fixing member 63 located radially on the stator core 61 does not need to contact the stator core 61, thus forming a cooling gap 607 between this portion and the stator core 61 for cooling the stator core 61. This arrangement allows the cooling medium to flow into the cooling gap 607, thereby facilitating the cooling of both the first fixing member 63 and the stator core 61.

[0198] In one embodiment, the first fixing part 641 located on the radial portion of the stator core 61, the second fixing part 642 located on the radial portion of the stator core 61, and the connecting part 643 may not contact the stator core 61, so that a gap is formed between the second fixing member 64 and the stator core 61, allowing the cooling medium to flow into the gap, thereby facilitating the cooling of the second fixing member 64 and the stator core 61.

[0199] like Figure 23 and Figure 26 As shown, in one embodiment, the fixing assembly 60 has ventilation openings 605 at both ends along the axial direction of the stator core 61. One opening of the ventilation opening 605 faces the stator core 61, and the ventilation opening 605 can deliver the cooling medium to the stator core 61. This arrangement can increase the contact area between the cooling medium and the stator core 61, and further improve the cooling effect of the cooling medium on the stator core 61.

[0200] like Figure 26 As shown, in one embodiment, the stator core 61 has chamfered portions 614 formed on both sides along its axial direction. The chamfered portions 614 are used to reduce the non-uniform electric field strength of the air in contact with the stator core 61, thereby avoiding air corona discharge. It should be noted that if the two sides of the stator core 61 along its axial direction are right angles, sharp edges will be formed on both sides of the stator core 61. These sharp edges have an excessively strong field concentration effect, resulting in a large electric field strength at the sharp edges of the stator core 61, thus causing air corona discharge. Therefore, this application forms smooth, rounded chamfered portions on both sides of the stator core 61 along its axial direction, which can reduce the field concentration effect, thereby reducing the electric field strength and avoiding air corona discharge.

[0201] In one embodiment, the chamfered portion 614 is located at the junction of the inner diameter surface of the stator core 61 and the side surface 615, and / or the chamfered portion 614 is located at the junction of the outer diameter surface of the stator core 61 and the side surface 615. The side surface 615 is one side surface of the stator core 61 along its axial direction.

[0202] like Figure 23 , Figure 24 and Figure 27 As shown, in one embodiment, each winding assembly 62 includes an end lead 622, which is connected to the toroidal winding 6211. The end lead 622 is used to connect to an external power source.

[0203] In one embodiment, the stator structure 600 further includes a lead wire fixing device 67, which is used to fix the end lead wire 622. This configuration restricts the movement of the end lead wire 622, preventing it from becoming scattered and overlapping with wires such as the phase-to-phase jumper wire 65. This avoids excessive electric field strength at the point of wire overlap, thus preventing the generation of air corona discharge.

[0204] In one embodiment, the fixing component 60 has fixing holes 606 formed at both ends along the axial direction of the stator core 61, and each lead wire fixing device 67 is connected to the fixing hole 606.

[0205] Along the radial direction of the stator core 61, the fixing hole 606 is located between the grounding slot 603 and the phase slot 604, thereby avoiding the overlap of the end lead 622, the grounding wire 66 and the phase jumper wire 65, which is beneficial to improving the electric field uniformity within the stator structure 600.

[0206] In one embodiment, the lead wire fixing device 67 includes a fixing post 671 and a lead outlet 672. The fixing post 671 is inserted into the fixing hole 606, and the lead outlet 672 allows the end lead wire 622 to pass through and be fixed, thereby limiting the position of the end lead wire 622.

[0207] In some embodiments, the first fixing member 63 has multiple fixing holes 606 at both ends along the axial direction of the stator core 61, the first fixing part 641 and the second fixing part 642. When the fixing post 671 is connected to different fixing holes 606, the installation position of the lead wire fixing device 67 can be adjusted, thereby adjusting the fixing position of the end lead wire 622, so as to meet different end lead wire 622 assembly requirements.

[0208] like Figure 28 As shown, in one embodiment, this application also provides an electric motor 100, which includes a rotor structure 700 and the stator structure 600 described above, with the stator structure 600 arranged around the rotor structure 700.

[0209] In some embodiments, the motor 100 is either a synchronous motor or an asynchronous motor.

[0210] In some embodiments, the rotor structure 700 is a superconducting rotor.

[0211] like Figure 28 and Figure 29As shown, the rotor structure 700 includes a rotor housing 76, a rotor shaft 71, a rotor core 75, and a rotor winding 78. The rotor housing 76 encloses a receiving space. The rotor shaft 71 is at least partially located within the receiving space, the rotor core 75 is at least partially located within the receiving space and surrounds the outside of the rotor shaft 71, and the rotor winding 78 is at least partially located within the receiving space and surrounds the outside of the rotor core 75.

[0212] In one embodiment, the rotor structure 700 further includes a first sealing space 72 and a second sealing space 73, both located within the receiving space. The first sealing space 72 surrounds the outside of the rotor shaft 71 and is used to receive a first refrigerant. The second sealing space 73 surrounds the outside of the first sealing area and is used to receive a second refrigerant, with the rotor core 75 and rotor windings 78 located within the second sealing space 73.

[0213] Since the rotor shaft 71 of this application is located in the room temperature range, it is kept at room temperature. While related technologies employ low-temperature shafts, which offer advantages such as simple structure and ease of manufacturing, the difficulty in implementing insulation in the shaft area makes severe heat leakage a common problem. However, by using a room-temperature rotor shaft 71 in this application, the temperature difference between the rotor shaft 71 and the ambient temperature is eliminated, thus resolving the heat leakage problem caused by the rotor shaft 71.

[0214] It should be noted that the first sealed space 72 can be filled with a first refrigerant, which, after filling the first sealed space 72, forms a first low-temperature zone within the rotor structure 700. The second sealed space 73 can be filled with a second refrigerant, which, after filling the second sealed space 73, forms a second low-temperature zone within the rotor structure 700. The temperatures in the room temperature zone, the first low-temperature zone, and the second low-temperature zone decrease sequentially. The second low-temperature zone has a relatively lower temperature and is used to enable superconductivity in the rotor winding 78 within the rotor structure 700. If the second low-temperature zone is directly adjacent to the room temperature zone, due to the large temperature difference between them, severe heat leakage is likely to occur between the two zones, making it difficult to maintain the low-temperature environment of the second low-temperature zone, or requiring higher costs to maintain its low-temperature environment. In this application, a first low-temperature zone is formed through a first sealed space 72, and a second low-temperature zone is formed through a second sealed space 72. The first low-temperature zone is set between the room temperature zone and the second low-temperature zone. By setting three temperature zones with a certain temperature gradient, the temperature difference between adjacent temperature zones can be reduced, the heat leakage phenomenon between adjacent temperature zones can be mitigated, and the serious heat leakage problem caused by the second low-temperature zone that achieves superconductivity being directly adjacent to the room temperature layer can be avoided.

[0215] It should be noted that the temperature of the first low-temperature zone can also be equal to or lower than the temperature of the second low-temperature zone. That is, the temperature of the first refrigerant can be lower than the temperature of the second refrigerant, or the first and second refrigerants can be the same refrigerant. This can further avoid the serious heat leakage problem caused by the second low-temperature zone for achieving superconductivity being directly adjacent to the room temperature layer.

[0216] In this embodiment, the example is described with the temperature of the first refrigerant being lower than the ambient temperature and the temperature of the first refrigerant being higher than the temperature of the second refrigerant.

[0217] In one embodiment, a second refrigerant can be used based on the temperature required to achieve superconductivity with the chosen superconducting material. This second refrigerant cools the rotor core 75 and rotor winding 78 to the appropriate superconducting temperature. Similarly, a first refrigerant with a temperature between the second refrigerant and room temperature is selected. By creating a temperature gradient between the second refrigerant and room temperature using the first refrigerant, the temperature difference between adjacent temperature zones can be reduced, mitigating heat leakage between them and avoiding severe heat leakage problems caused by the direct proximity of the second low-temperature zone for achieving superconductivity to the room temperature layer.

[0218] In one embodiment, the second refrigerant can be cold helium gas, so that when the rotor structure 700 is working, the second low-temperature zone and the rotor core 75 and rotor winding 78 in the second low-temperature zone can be basically in a low-temperature environment of 30K; while the first refrigerant can be liquid nitrogen, so that the first low-temperature zone can be basically in a low-temperature environment of 77K when working, thereby enabling the first low-temperature zone to buffer the temperature difference between the second low-temperature zone and the normal temperature environment and reduce the heat leakage phenomenon of the second low-temperature zone.

[0219] like Figure 29 and Figure 30 As shown, in one implementation, the rotor structure 700 further includes a first inner sealing layer 721, a first outer sealing layer 722, and two first end plates 723. The first outer sealing layer 722 surrounds the outside of the first inner sealing layer 721. One of the first end plates 723 is connected to one side of the first inner sealing layer 721 along the axial direction of the rotor shaft 71 and the other side of the first outer sealing layer 722 along the axial direction of the rotor shaft 71. The other side of the first inner sealing layer 721 and the other side of the first outer sealing layer 722 are connected to the other first end plate 723. The first inner sealing layer 721, the first outer sealing layer 722, and the two first end plates 723 surround each other to form a first sealing space 72.

[0220] In one embodiment, the first end plate 723 is substantially annular, and the first inner sealing layer 721 and the first outer sealing layer 722 are substantially hollow cylindrical or hollow polygonal. Both first end plates 723 are connected between the first inner sealing layer 721 and the first outer sealing layer 722, thereby forming a complete first sealing space 72 through the interconnection between the two first end plates 723 and the first inner sealing layer 721, and the interconnection between the two first end plates 723 and the first outer sealing layer 722. A first low-temperature zone is formed after the first refrigerant is introduced into this first sealing space 72.

[0221] In one embodiment, the rotor structure 700 further includes a second inner sealing layer 731, a second outer sealing layer 732, and two second end plates 733. The second outer sealing layer 732 surrounds the outside of the second inner sealing layer 731. One of the second end plates 733 is connected to one side of the second inner sealing layer 731 along the axial direction of the rotor shaft 71 and the other side of the second outer sealing layer 732 along the axial direction of the rotor shaft 71. The other side of the second inner sealing layer 731 and the other side of the second outer sealing layer 732 are connected to the other second end plate 733. The second inner sealing layer 731, the second outer sealing layer 732, and the two second end plates 733 surround to form a second sealing space 73.

[0222] The second end plate 733 is basically annular, and the second inner sealing layer 731 and the second outer sealing layer 732 are basically hollow cylinders or hollow polygons. Furthermore, the inner diameter of the second end plate 733 is greater than or equal to the outer diameter of the first end plate 723. Both second end plates 733 are connected between the second inner sealing layer 731 and the second outer sealing layer 732. The two second end plates 733 are interconnected with the second inner sealing layer 731, and the two first end plates 723 are interconnected with the second outer sealing layer 732, forming a complete second sealing space 73. When the second refrigerant is introduced into this second sealing space 73, a second low-temperature zone is formed.

[0223] It should be noted that the first inner sealing layer 721 and the first outer sealing layer 722 enclose a first sealing space 72, which is filled with a first refrigerant, forming a first low-temperature zone. The second inner sealing layer 731 and the second outer sealing layer 732 enclose a second sealing space 73, in which components such as the rotor core 75 and the rotor winding 78 can be installed. Simultaneously, a second refrigerant of a corresponding temperature can be introduced into the second sealing space 73 surrounding the rotor core 75 and the rotor winding 78, keeping them at a low temperature and thus achieving superconductivity in the rotor core 75 and the rotor winding 78.

[0224] like Figure 31As shown, in one implementation, the outer surface of the rotor shaft 71 and the outer surface of the first inner sealing layer 721 are defined as the first connecting outer surface, and the inner surface of the first inner sealing layer 721 and the inner surface of the first outer sealing layer 722 are defined as the first connecting inner surface. One of the first connecting inner surface and the first connecting outer surface is provided with multiple protruding tooth structures 701, and the other is provided with multiple groove structures 702. Each protruding tooth structure 701 and a groove structure 702 overlap radially along the rotor shaft 71. The rotor shaft 71 and the first inner sealing layer 721, and the first inner sealing layer 721 and the first outer sealing layer 722 are connected by the protruding tooth structure 701 and the groove structure 702. The thickness of the protruding tooth structure 701 radially along the rotor shaft 71 is greater than the thickness of the groove structure 702 radially along the rotor shaft 71, so that a first sealing space 72 is formed between the first inner sealing layer 721 and the first outer sealing layer 722.

[0225] The outer surface of the first outer sealing layer 722 and the outer surface of the second inner sealing layer 731 are defined as the second connecting outer surface, and the inner surface of the second inner sealing layer 731 and the inner surface of the second outer sealing layer 732 are defined as the second connecting inner surface. One of the second connecting inner surface and the second connecting outer surface is provided with a plurality of protruding tooth structures 701, and the other is provided with a plurality of groove structures 702. Each protruding tooth structure 701 and a groove structure 702 overlap radially along the rotor shaft 71. The first outer sealing layer 722 and the second inner sealing layer 731, and the second inner sealing layer 731 and the second outer sealing layer 732 are connected by the protruding tooth structure 701 and the groove structure 702. The thickness of the protruding tooth structure 701 radially along the rotor shaft 71 is greater than the thickness of the groove structure 702 radially along the rotor shaft 71, so that a second sealing space 73 is formed between the second inner sealing layer 731 and the second outer sealing layer 732.

[0226] It should be noted that the first inner sealing layer 721, the first outer sealing layer 722, the second inner sealing layer 731, and the second outer sealing layer 732 of this application are basically hollow polygonal bodies, which is conducive to the arrangement of the tooth structure 701 and the groove structure 702 and their mating connection.

[0227] It should be noted that, in this application, the rotor structure 700 consists of, from the inside out, a rotor shaft 71, a first inner sealing layer 721, a first outer sealing layer 722, a second inner sealing layer 731, a rotor core 75, a rotor winding 78, and a second outer sealing layer 732.

[0228] like Figure 29 and Figure 31As shown, specifically, the rotor structure 700 also includes a heat insulation layer assembly 74, which can be provided as needed in the above-mentioned layer structures. More specifically, the heat insulation layer assembly 74 may include a first heat insulation layer 741 located between the rotor shaft 71 and the first inner sealing layer 721 and / or a second heat insulation layer 742 located between the first outer sealing layer 722 and the second inner sealing layer 731.

[0229] Through the above configuration, a first heat insulation layer 741 can be provided between the normal temperature zone and the first low temperature zone, i.e., between the rotor shaft 71 and the first inner sealing layer 721; and a second heat insulation layer 742 can be provided between the first low temperature zone and the second low temperature zone, i.e., between the first outer sealing layer 722 and the second inner sealing layer 731. The first heat insulation layer 741 and the second heat insulation layer 742 can further reduce heat transfer between adjacent temperature zones, thereby further reducing heat leakage. The first heat insulation layer 741 and the second heat insulation layer 742 can be made of the same heat insulation material, or, depending on the temperature difference between the two temperature zones, a suitable heat insulation layer with certain differences in material composition can be selected. Furthermore, the thickness and shape of the first heat insulation layer 741 and the second heat insulation layer 742 can be the same, or, based on actual conditions and combined with strength requirements, connection stability requirements, etc., a suitable heat insulation layer with certain differences in thickness and shape can be selected. In this application, for reasons such as cost, the first insulation layer 741 and the second insulation layer 742 are preferably insulation layers made of the same insulation material and of the same thickness.

[0230] In one embodiment, a third heat insulation layer 743 may be disposed inside the first outer sealing layer 722, and the third heat insulation layer 743 is disposed substantially in close contact with the first outer sealing layer 722. Specifically, the third heat insulation layer 743 is located between the first inner sealing layer 721 and the first outer sealing layer 722. With this arrangement, the third heat insulation layer 743 and the second heat insulation layer 742 are substantially disposed on the inner and outer sides of the first outer sealing layer 722. The third heat insulation layer 743 can further increase the thermal resistance between the second low-temperature zone and the first low-temperature zone. At the same time, the third heat insulation layer 743 and the second heat insulation layer 742 cooperate with each other to further isolate the heat transfer between the first outer sealing layer 722 and the second heat insulation layer 742.

[0231] In one embodiment, at least one of the first heat insulation layer 741, the second heat insulation layer 742, or the third heat insulation layer 743 may be made of a resin material including epoxy resin.

[0232] In some embodiments, a first heat-insulating vacuum layer 744 can be formed between the rotor shaft 71 and the first heat-insulating layer 741, and a second heat-insulating vacuum layer 745 can be formed between the second heat-insulating layer 742 and the first outer sealing layer 722. The first heat-insulating vacuum layer 744 is located between the ambient temperature region and the first low temperature region. The first heat-insulating vacuum layer 744 can substantially isolate heat transfer between the rotor shaft 71 and the first heat-insulating layer 741, and can further isolate heat transfer between the ambient temperature region and the first low temperature region, achieving heat insulation in most areas between the first low temperature region and the ambient temperature region. The second heat-insulating vacuum layer 745 is located between the first low temperature region and the second low temperature region. The second heat-insulating vacuum layer 745 can substantially isolate heat transfer between the first outer sealing layer 722 and the second heat-insulating layer 742, and can further isolate heat transfer between the first low temperature region and the second low temperature region, achieving heat insulation in most areas between the second low temperature region and the first low temperature region.

[0233] By setting three temperature zones (i.e., normal temperature zone, first low temperature zone, and second low temperature zone), and simultaneously setting a heat insulation layer assembly 74 between adjacent temperature zones and forming a corresponding vacuum layer for heat insulation, not only can the temperature difference between each temperature zone be reduced, and heat leakage reduced by reducing the temperature gradient, but also heat transfer can be further reduced through the heat insulation layer assembly 74 and the formed vacuum layer. This can solve the serious heat leakage problem that easily occurs in the rotor structure 700 of the existing superconducting motor, and reduce the efficiency and cost of forming a stable low temperature environment in the second low temperature zone.

[0234] like Figure 31 As shown, in one embodiment, in the rotor structure 700 of the first embodiment of this application, the rotor shaft 71, the first heat insulation layer 741, the first inner sealing layer 721, the first outer sealing layer 722, the second heat insulation layer 742, the second inner sealing layer 731 and the rotor core 75 are fixed together by the mutual cooperation of the tooth structure 701 and the groove structure 702.

[0235] In one embodiment, the outer surface of the rotor shaft 71, the outer surface of the first heat insulation layer 741, the outer surface of the first inner sealing layer 721, the outer surface of the third heat insulation layer 743, the outer surface of the first outer sealing layer 722, the outer surface of the second heat insulation layer 742, and the outer surface of the second inner sealing layer 731 are defined as the third connecting outer surface.

[0236] The inner surface of the first heat insulation layer 741, the inner surface of the first inner sealing layer 721, the inner surface of the third heat insulation layer 743, the inner surface of the first outer sealing layer 722, the inner surface of the second heat insulation layer 742, the inner surface of the second inner sealing layer 731, and the inner surface of the second outer sealing layer 732 are defined as the third connecting inner surface.

[0237] One of the inner surface and the outer surface of the third connection is provided with a plurality of protruding tooth structures 701, and the other is provided with a plurality of groove structures 702, wherein each protruding tooth structure 701 and a groove structure 702 overlap radially along the rotor shaft 71.

[0238] The rotor shaft 71 is connected to the first heat insulation layer 741, the first heat insulation layer 741 is connected to the first inner sealing layer 721, the first inner sealing layer 721 is connected to the third heat insulation layer 743, the third heat insulation layer 743 is connected to the first outer sealing layer 722, the first outer sealing layer 722 is connected to the second heat insulation layer 742, the second heat insulation layer 742 is connected to the second inner sealing layer 731, and the second inner sealing layer 731 is connected to the second outer sealing layer 732 through the tooth structure 701 and the groove structure 702.

[0239] In some embodiments, a plurality of shaft protrusions 711 are formed on the outer side of the rotor shaft 71, and a plurality of first heat-insulating grooves 7411 that cooperate with the shaft protrusions 711 are formed on the inner side of the first heat-insulating layer 741. The first heat-insulating layer 741 is sleeved on the outer side of the rotor shaft 71 and fixed to the rotor shaft 71 through the shaft protrusions 711 and the first heat-insulating grooves 7411. After the groove structure 702 on the inner side of the first heat-insulating layer 741 cooperates with the protrusion structure 701 on the outer side of the rotor shaft 71, it can not only fix the first heat-insulating layer 741 and the rotor shaft 71 to each other, but also realize the transmission of force and torque between the rotor shaft 71 and the first heat-insulating layer 741. Furthermore, in order to better connect the rotor shaft 71 and the first heat insulation layer 741, a number of shaft protrusions 711 are provided in both the circumferential and axial directions of the rotor shaft 71. The number of shaft protrusions 711 are evenly distributed on the rotor shaft 71, and a corresponding first heat insulation groove 7411 is provided on the inner side of the first heat insulation layer 741 to match it.

[0240] In one embodiment, a plurality of uniformly distributed first heat-insulating protrusions 7412 are also formed on the outer side of the first heat-insulating layer 741, and a first inner sealing groove 7211 corresponding to the first heat-insulating protrusions 7412 on the outer side of the first heat-insulating layer 741 is formed on the inner side of the first inner sealing layer 721. After the first inner sealing layer 721 is fitted onto the outer side of the first heat-insulating layer 741, the first heat-insulating protrusions 7412 on the outer side of the first heat-insulating layer 741 and the first inner sealing groove 7211 on the inner side of the first inner sealing layer 721 cooperate with each other to realize the transmission of force and torque.

[0241] Similarly, multiple first inner sealing teeth 7212 are formed on the outer side of the first inner sealing layer 721, multiple first outer sealing grooves 7221 and multiple first outer sealing teeth 7222 are formed on the inner and outer sides of the first outer sealing layer 722, multiple second heat insulation grooves 7421 and multiple second heat insulation teeth 7422 are formed on the inner and outer sides of the second heat insulation layer 742, multiple second inner sealing grooves 7311 and multiple second inner sealing teeth 7312 are formed on the inner and outer sides of the second inner sealing layer 731, and multiple core grooves 751 are formed on the inner side of the rotor core 75. After the above arrangement, the rotor shaft 71, the first heat insulation layer 741, the first inner sealing layer 721, the first outer sealing layer 722, the second heat insulation layer 742, the second inner sealing layer 731, and the rotor core 75 are fixed together by the cooperation of the tooth structure 701 and the groove structure 702, and the force and torque are transmitted.

[0242] In one embodiment, the tooth structure 701 located on the outer surfaces of the rotor shaft 71, the first heat insulation layer 741, the first inner sealing layer 721, the first outer sealing layer 722, the second heat insulation layer 742, and the second inner sealing layer 731 can be either a continuous, complete tooth extending axially along the rotor shaft 71, or multiple independent teeth distributed axially along the rotor shaft 71. Alternatively, a continuous, complete tooth extending axially along the rotor shaft 71 can be formed on some components, while several independent teeth distributed axially along the rotor shaft 71 can be formed on other components. The tooth structure 701 and the groove structure 702 between adjacent layers can cooperate to fix each layer structure in the circumferential direction of the rotor shaft 71.

[0243] In one embodiment, the rotor shaft 71 in this application is a complete integral structure, which allows the integral rotor shaft 71 to bear greater force and torque, thereby improving the performance and reliability of the rotor structure 700. Simultaneously, in the rotor structure 700, there are two low-temperature zones (i.e., a first low-temperature zone and a second low-temperature zone) between the rotor shaft 71 and the second outer sealing layer 732. These two low-temperature zones are filled with a first cooling medium and a second cooling medium. By setting the rotor shaft 71 and the second outer sealing layer 732 as complete integral structures, the sealing performance of the rotor structure 700 can be improved, thermal resistance increased, heat leakage problems within the rotor structure 700 reduced, and the insulation effect of the rotor structure 700 enhanced.

[0244] like Figure 31As shown, in one implementation, the first heat insulation layer 741 includes multiple first heat insulation portions 7413, which are arranged axially along the rotor shaft 71 to form the first heat insulation layer 741. The first heat insulation layer 741 is located between the normal temperature region and the first low temperature region. During the operation of the rotor structure 700, the first heat insulation layer 741 undergoes a state change process from normal temperature to low temperature, during which the first heat insulation layer 741 experiences thermal contraction. That is, due to the principle of thermal expansion and contraction, the first heat insulation layer 741 undergoes volume shrinkage when it changes from a normal temperature state to a low temperature state, especially in the first heat insulation layer 741 and the second heat insulation layer 742 along the rotor shaft 71. This volume shrinkage results in a significant change in the overall size of the first heat insulation layer 741, affecting the mutual fixation between the first heat insulation layer 741, the rotor shaft 71, and the first inner sealing layer 721. It also poses a risk of breakage to the first heat insulation layer 741 itself, adversely affecting the reliability of the rotor structure 700. Therefore, this application divides the first heat insulation layer 741 into several first heat insulation portions 7413 axially along the rotor shaft 71. Utilizing the separation between these portions (i.e., a gap exists between adjacent portions), the overall shrinkage of the first heat insulation layer 741 is evenly distributed, reducing the overall dimensional change during shrinkage. The smaller shrinkage of each first heat insulation portion 7413 also reduces the positional shift caused by shrinkage, improving the stability of the first heat insulation layer 741 with respect to the rotor shaft 71 and the first inner sealing layer 721, thereby enhancing the stability of the rotor structure 700.

[0245] The second heat insulation layer 742 is also configured similarly to the first heat insulation layer 741, comprising a plurality of second heat insulation portions 7423. These portions 7423 are arranged axially along the rotor shaft 71 to form the second heat insulation layer 742. A gap exists between adjacent second heat insulation portions 7423. This configuration improves the stability of the second heat insulation layer 742 in relation to the first outer sealing layer 722 and the second inner sealing layer 731, thereby enhancing the stability of the rotor structure 700.

[0246] After the first insulation layer 741 and the second insulation layer 742 are configured as described above, they can achieve the function of heat insulation, and the gaps generated after the cold shrinkage of each part have little impact on the heat insulation function. At the same time, they can also solve the problems of heat leakage and mechanical strength caused by the large changes in the overall cold shrinkage size.

[0247] For the rotor structure 700 with a third heat insulation layer 743, the third heat insulation layer 743 is configured similarly to the first heat insulation layer 741 and the second heat insulation layer 742. The third heat insulation layer 743 is configured to include multiple third heat insulation portions 7433, which are arranged axially along the rotor shaft 71 to form the third heat insulation layer 743. Furthermore, there is a gap between adjacent third heat insulation portions 7433.

[0248] Similarly, the rotor core 75 includes a plurality of rotor core portions 752, which are arranged axially along the rotor shaft 71 to form the rotor core 75.

[0249] In one implementation, the first inner sealing layer 721 includes a plurality of first inner sealing portions 7213 and a plurality of first inner corrugated portions 7214. The plurality of first inner sealing portions 7213 and the plurality of first inner corrugated portions 7214 are arranged axially along the rotor shaft 71, and each first inner corrugated portion 7214 is connected between two adjacent first inner sealing portions 7213. The plurality of first inner sealing portions 7213 and the plurality of first inner corrugated portions 7214 can be integrally formed, or the first inner sealing portions 7213 and the first inner corrugated portions 7214 can be connected by welding, so that the first inner sealing layer 721 forms a complete whole.

[0250] The first inner corrugated portion 7214 has a certain degree of freedom of extension and contraction in the axial direction of the rotor shaft 71. When the first inner sealing portion 7213 shrinks due to cold contraction, the first inner corrugated portion 7214 can be stretched to compensate for the shrinkage of the first inner sealing portion 7213. By connecting two adjacent first inner sealing portions 7213 through the first inner corrugated portion 7214, the problem of cold contraction due to temperature changes can be solved, so that the axial dimension of the first inner sealing layer 721 remains basically unchanged, which is beneficial to the stability of the first inner sealing layer 721 itself. It also helps to improve the connection stability between the first inner sealing layer 721 and the adjacent first heat insulation layer 741 and second heat insulation layer 742. At the same time, the first inner corrugated portion 7214 between adjacent first inner sealing portions 7213 can also improve the sealing performance of the first inner sealing layer 721, prevent the first cooling medium located therein from leaking at the first inner sealing layer 721, and reduce heat leakage.

[0251] The first outer sealing layer 722, the second inner sealing layer 731, and the second outer sealing layer 732 also adopt a design similar to that of the first inner sealing layer 721. Specifically, the first outer sealing layer 722 includes multiple first outer sealing portions 7223 and multiple first outer corrugated portions 7224, which are arranged axially along the rotor shaft 71. Each first outer corrugated portion 7224 is connected between two adjacent first outer sealing portions 7223. Similarly, the second inner sealing layer 731 includes multiple second inner sealing portions 7313 and multiple second inner corrugated portions 7314, which are arranged axially along the rotor shaft 71. Each second inner corrugated portion 7314 is connected between two adjacent second inner sealing portions 7313. The second outer sealing layer 732 includes a plurality of second outer sealing portions 7321 and a plurality of second outer corrugated portions 7322, which are arranged along the axial direction of the rotor shaft 71, and each second outer corrugated portion 7322 is connected between two adjacent second outer sealing portions 7321.

[0252] like Figure 31 As shown, in one embodiment, the rotor shaft 71 forms a plurality of shaft fixing holes 712, the first inner sealing layer 721 forms a plurality of first inner sealing holes 7215 penetrating the first inner sealing layer 721, the first outer sealing layer 722 forms a plurality of first outer sealing holes 7225 penetrating the first outer sealing layer 722, the second inner sealing part 7313 forms a plurality of second inner sealing holes 7315 penetrating the second inner sealing layer 731, and the rotor core 75 forms a plurality of core fixing holes 753 penetrating the rotor core 75. Each shaft fixing hole 712 overlaps with and interpenetrates a first inner sealing hole 7215, a first outer sealing hole 7225, a second inner sealing hole 7315, and a core fixing hole 753 along the radial direction of the rotor shaft 71 to form a fixing channel.

[0253] It should be noted that multiple shaft fixing holes 712 are evenly arranged on the rotor shaft 71 along the circumference and axial direction; multiple first inner sealing holes 7215 are evenly arranged on the first inner sealing layer 721 along the circumference and axial direction of the rotor shaft 71; multiple first outer sealing holes 7225 are evenly arranged on the first outer sealing layer 722 along the circumference and axial direction of the rotor shaft 71; multiple second inner sealing holes 7315 are evenly arranged on the second inner sealing layer 731 along the circumference and axial direction of the rotor shaft 71; and multiple core fixing holes 753 are evenly arranged on the rotor core 75 along the circumference and axial direction of the rotor shaft 71.

[0254] In some embodiments, if the rotor structure 700 further includes a first heat insulation layer 741, a second heat insulation layer 742, and a third heat insulation layer 743, then the first heat insulation layer 741 forms a plurality of first heat insulation holes 7414 penetrating the first heat insulation layer 741, the second heat insulation layer 742 forms a plurality of second heat insulation holes 7424 penetrating the second heat insulation layer 742, and the third heat insulation layer 743 forms a plurality of third heat insulation holes 7434 penetrating the third heat insulation layer 743.

[0255] Each shaft fixing hole 712, a first heat insulation hole 7414, a first inner sealing hole 7215, a third heat insulation hole 7434, a first outer sealing hole 7225, a second heat insulation hole 7424, a second inner sealing hole 7315, and a core fixing hole 753 overlap and communicate with each other along the radial direction of the rotor shaft 71 to form a fixing channel.

[0256] like Figure 32 and Figure 33 As shown, the rotor structure 700 also includes multiple fixing posts 77, each of which is installed in a fixed channel, thereby fixing the rotor shaft 71, the first heat insulation layer 741, the first inner sealing layer 721, the third heat insulation layer 743, the first outer sealing layer 722, the second heat insulation layer 742, the second inner sealing layer 731, and the rotor core 75 into a complete whole, improving the reliability of force and torque transmission between the above components.

[0257] like Figure 31 , Figure 32 and Figure 33 As shown, a plurality of first inner sealing holes 7215 are formed in a plurality of first inner sealing portions 7213, a plurality of first outer sealing holes 7225 are formed in a plurality of first outer sealing portions 7223, and a plurality of second inner sealing holes 7315 are formed in a plurality of second inner sealing portions 7313.

[0258] Multiple first heat insulation holes 7414 are formed in multiple first heat insulation portions 7413, multiple second heat insulation holes 7424 are formed in multiple second heat insulation portions 7423, and multiple third heat insulation holes 7434 are formed in multiple third heat insulation portions 7433. Further, each first heat insulation hole 7414 is configured to penetrate the center of a first heat insulation protrusion 7412. The area where the first heat insulation protrusion 7412 of the first heat insulation portion 7413 is located has a relatively large thickness. Placing the first heat insulation hole 7414 at the first heat insulation protrusion 7412 can minimize the impact on the overall mechanical strength of the first heat insulation portion 7413, and also ensure the connection strength and reliability between the fixing post 77 and the first heat insulation portion 7413 after the fixing post 77 passes through the first heat insulation hole 7414.

[0259] Similarly, the second heat insulation part 7423, the first inner sealing part 7213, the first outer sealing part 7223, and the second inner sealing part 7313 can also be configured in a manner similar to that of the first heat insulation part 7413, with corresponding hole structures provided in the toothed structure 701. That is, the outer surface of each second heat insulation part 7423, each first inner sealing part 7213, each first outer sealing part 7223, and each second inner sealing part 7313 includes a complete toothed structure 701, and each corresponding hole structure is configured to penetrate the center of a toothed structure 701.

[0260] In one embodiment, each fixing column 77 in this application includes an inner cylinder 771, a middle cylinder 772, an outer cylinder 773, and a filling column 774. Specifically, the middle cylinder 772 includes a middle cylinder sleeve portion 7721 and a middle cylinder fixing portion 7722, with the middle cylinder sleeve portion 7721 located inside the inner cylinder 771 and the middle cylinder fixing portion 7722 located outside the inner cylinder 771. The outer cylinder 773 includes an outer cylinder sleeve portion 7731 and an outer cylinder fixing portion 7732, with the outer cylinder sleeve portion 7731 located inside the middle cylinder 772 and the outer cylinder fixing portion 7732 located outside the middle cylinder 772. The filling column 774 includes a filling column sleeve portion 7741 and a filling column fixing portion 7742, with the filling column sleeve portion 7741 located inside the outer cylinder 773 and the filling column fixing portion 7742 located outside the outer cylinder 773. At least a portion of the inner cylinder 771 is connected to the first inner sealing layer 721, the middle cylinder fixing part 7722 is connected to the first outer sealing layer 722, the outer cylinder fixing part 7732 is connected to the second inner sealing layer 731, and the filling column fixing part 7742 is located inside the iron core fixing hole 753.

[0261] At least a portion of the inner cylinder 771 is welded and fixed to the first inner sealing layer 721, the middle cylinder fixing portion 7722 is welded and fixed to the first outer sealing layer 722, and the outer cylinder fixing portion 7732 is welded and fixed to the second inner sealing layer 731. More specifically, the sidewall of the inner cylinder 771 is welded to the first inner sealing hole 7215 in the first inner sealing layer 721, the sidewall of the middle cylinder fixing portion 7722 is welded to the first outer sealing hole 7225 in the first outer sealing layer 722, and the sidewall of the outer cylinder fixing portion 7732 is welded to the second inner sealing hole 7315 in the second inner sealing layer 731. The inner cylinder 771 is essentially a hollow cylinder sealed at one end, and the filling column sleeve portion 7741, the outer cylinder sleeve portion 7731, the middle cylinder sleeve portion 7721, and the inner cylinder 771 at least partially overlap radially along the inner cylinder 771.

[0262] In one embodiment, the inner cylinder 771 and the middle cylinder sleeve portion 7721, and the middle cylinder 772 and the outer cylinder sleeve portion 7731, may be configured to fit together. The fitted arrangement of the inner cylinder 771 and the middle cylinder sleeve portion 7721, and the fitted arrangement of the middle cylinder 772 and the outer cylinder sleeve portion 7731, eliminates gaps between the inner cylinder 771, the middle cylinder 772, and the outer cylinder 773, improves the strength of the fixing column 77, and enhances the reliability and stability of force and torque transmission between the components after the fixing column 77 is connected.

[0263] In another embodiment, a certain gap may be configured between the inner cylinder 771 and the middle cylinder sleeve portion 7721, and between the middle cylinder 772 and the outer cylinder sleeve portion 7731. This gap between the inner cylinder 771 and the middle cylinder sleeve portion 7721 increases the thermal resistance between them, preventing heat transfer and reducing heat leakage. Similarly, the gap between the middle cylinder 772 and the outer cylinder sleeve portion 7731 increases the thermal resistance between them, preventing heat transfer and reducing heat leakage.

[0264] In some embodiments, the gap between the inner cylinder 771 and the middle cylinder sleeve portion 7721, and the gap between the middle cylinder 772 and the outer cylinder sleeve portion 7731, can be further configured to a vacuum state, thereby further increasing the thermal resistance between the inner cylinder 771, the middle cylinder 772 and the outer cylinder 773, further reducing heat transfer, and further reducing the cold leakage phenomenon between the outer cylinder 773, the middle cylinder 772 and the inner cylinder 771.

[0265] In some embodiments, the gaps between the inner cylinder 771 and the middle cylinder sleeve 7721, and between the middle cylinder 772 and the outer cylinder sleeve 7731, can be filled with heat-insulating material. This arrangement eliminates the gaps inside the fixing column 77, increasing its overall strength, and also increases the thermal resistance between the outer cylinder 773, the middle cylinder 772, and the inner cylinder 771, reducing heat transfer between them.

[0266] In some embodiments, the thermal insulation material filling the gap may be a thermal insulation filler material such as epoxy resin, polytetrafluoroethylene resin or fiberglass.

[0267] The rotor structure 700 also includes a fixing bolt 775, at least a portion of which is located within and connected to the core fixing hole 753. The fixing bolt 775 also abuts against the end of the filler post fixing part 7742 away from the filler post sleeve part 7741. Through the above arrangement, the fixing post 77 and the rotor core 75 can be connected, and the fixing post 77 can be fixed in the fixing channel. This facilitates the fixing of the rotor shaft 71, the first heat insulation layer 741, the first inner sealing layer 721, the first outer sealing layer 722, the second heat insulation layer 742, the second inner sealing layer 731, and the rotor core 75 to form a complete unit.

[0268] In one embodiment, the filler column 774 is made of thermal insulation material, thereby further increasing thermal resistance and reducing heat transfer through the fixed column 77. Furthermore, the thermal insulation material of the filler column 774 can be fiberglass. Fiberglass possesses both good mechanical properties such as strength, enabling better transmission of force and torque, and good thermal insulation performance.

[0269] like Figure 30 and Figure 34 As shown, in one embodiment, the rotor housing 76 includes a rotor shell layer 761 and two rotor end plates 762. The two rotor end plates 762 are connected to both sides of the rotor shell layer 761 along the axial direction of the rotor shaft 71. The two rotor end plates 762 on both sides are interconnected with the rotor shell layer 761 to form the rotor housing 76. The rotor housing 76 surrounds the outside of the second sealing space 73 and forms a rotor vacuum layer 763 between the rotor housing 761 and the first sealing space 72 and the second sealing space 73.

[0270] The rotor shell 761 includes, from the inside out, a support layer 7611, a shell sealing layer 7612, a shielding layer 7613, and a reinforcing layer 7614.

[0271] The two rotor end plates 762 are respectively connected to the housing sealing layer 7612 on both sides along the rotor shaft 71 axial direction.

[0272] The support layer 7611 is located between the second sealed space 73 and the shell sealing layer 7612. Specifically, the support layer 7611 fills the vacuum layer between the shell sealing layer 7612 and the second outer sealing layer 732. The support layer 7611 has a porous structure and is made of a material with low thermal conductivity. Filled in the aforementioned location, the support layer 7611 supports the shell sealing layer 7612, preventing the outer shell sealing layer 7612 and other structures from collapsing due to the vacuum environment. Simultaneously, the low thermal conductivity of the support layer 7611, combined with its surrounding vacuum environment, blocks the path of heat leakage from the second low-temperature zone to the outside, further reducing heat loss from the second low-temperature zone.

[0273] In one embodiment, the support layer 7611 may adopt a hexagonal honeycomb structure. The hexagonal honeycomb structure has high mechanical strength and support capacity, and can support the shell sealing layer 7612 in a vacuum environment, preventing the shell sealing layer 7612 and other structures from collapsing due to the vacuum environment.

[0274] The shielding layer 7613 is used to protect the superconducting coils in the rotor winding 78 from the influence of external harmonic armature magnetic fields. Specifically, the shielding layer 7613 can be made of a metallic material, such as a thin layer of copper.

[0275] The reinforcing layer 7614 is used to fix the shielding layer 7613, preventing the shielding layer 7613 from radially detaching due to centrifugal force during rotor structure 700 operation, thereby improving the operational stability of rotor structure 700. Specifically, the reinforcing layer 7614 can be a carbon fiber layer with high tensile strength.

[0276] As one implementation, this application also provides a device including the aforementioned motor 100. This device can be a high-temperature superconducting synchronous condenser, used for reactive power compensation in power systems.

[0277] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A stator structure, characterized in that, include: A stator core, the stator core comprising at least two bent sections, each of the bent sections being sequentially connected to form a ring-shaped stator core; Multiple winding assemblies, each of the winding assemblies being sleeved on the stator core circumferentially; Multiple fixing components are provided, each of which is fixedly connected to the stator core. The fixing components are arranged sequentially along the circumference of the stator core. At least one winding component is provided between two adjacent fixing components, and the winding component is fixed along the circumference of the stator core.

2. The stator structure according to claim 1, characterized in that, The fixing component includes a first fixing member, which is annular and sleeved on the stator core along the circumference of the stator core.

3. The stator structure according to claim 2, characterized in that, A gap is formed between two adjacent winding assemblies, and the first fixing member is located in the gap and connected to the two winding assemblies corresponding to the gap.

4. The stator structure according to claim 1, characterized in that, The fixing component includes a support portion formed on the outer diameter surface of the stator core.

5. The stator structure according to claim 4, characterized in that, Each of the curved segments is provided with one of the support portions.

6. The stator structure according to claim 5, characterized in that, The support portion is located at the middle of the curved section along its circumference.

7. The stator structure according to claim 4, characterized in that, Each of the curved sections is provided with a plurality of support portions, which are arranged along the axial direction of the curved section.

8. The stator structure according to claim 7, characterized in that, The plurality of the support portions are located at the middle of the circumferential direction of the curved section.

9. The stator structure according to claim 4, characterized in that, The fixing assembly further includes a second fixing member, which is fixedly connected to the support portion to form a ring structure, and a portion of the stator core along its circumference is located within the ring structure.

10. The stator structure according to claim 9, characterized in that, The second fixing member includes a first fixing part, a second fixing part, and a connecting part. One end of the first fixing part and one end of the second fixing part are connected through the connecting part. The other end of the first fixing part is connected to one side of the support part along the axial direction of the curved section, and the other end of the second fixing part is connected to the other side of the support part along the axial direction of the curved section. The first fixing part and the second fixing part are also respectively connected to the two winding assemblies on both sides of the support part.

11. The stator structure according to any one of claims 4 to 10, characterized in that, The support portion is integrally formed with the stator core.

12. The stator structure according to any one of claims 4 to 10, characterized in that, The fixing component further includes a first fixing member, which is annular and sleeved on the stator core along the circumference of the stator core. The support portion and the first fixing member are arranged at intervals along the circumference of the stator core. At least one of the winding assemblies is provided between the adjacent support portion and the first fixing member.

13. The stator structure according to claim 1, characterized in that, Interlocking between adjacent curved sections.

14. The stator structure according to claim 13, characterized in that, One end of any of the bending segments has a connecting protrusion, and the other end has a connecting groove. Two adjacent bending segments are connected by the connecting protrusion and the connecting groove.

15. The stator structure according to claim 1, characterized in that, Both ends of the curved section are formed with arc-shaped grooves along its circumference. The stator structure also includes a fixing column, which is inserted into the arc-shaped groove of two adjacent curved sections so that the two adjacent curved sections are connected.

16. The stator structure according to claim 1, characterized in that, The winding assembly includes a plurality of mutually abutting winding modules, each winding module comprising: Toroidal winding; A support assembly is provided, wherein the annular winding is fixedly fixed around the support assembly, and the support assembly has an installation port. The support assembly is sleeved on the stator core along the circumference of the stator core through the installation port, and the shape of the installation port matches the circumferential cross-section of the stator core, so that the winding assembly is fixed along the axial and radial directions of the stator core.

17. The stator structure according to claim 16, characterized in that, The support assembly includes a first support member and a second support member. The annular winding is fixed between the first support member and the second support member. Both the first support member and the second support member are sleeved on the stator core along the circumference of the stator core.

18. The stator structure according to claim 17, characterized in that, The structure of the second support member is the same as that of the first support member and they are mirror images of each other.

19. The stator structure according to claim 17 or 18, characterized in that, The first support member includes a rectangular protrusion and two linear protrusions extending axially along the stator core. The two linear protrusions are respectively located on both sides of the rectangular protrusion along the radial direction of the stator core. The annular winding is wound around the rectangular protrusion and abuts against the two linear protrusions.

20. The stator structure according to claim 19, characterized in that, The rectangular protrusion has a through-hole for fitting onto the stator core, and the through-hole forms at least a portion of the mounting opening.

21. The stator structure according to claim 17 or 18, characterized in that, In the same winding assembly, the first support located on one side of the stator core along the circumference of the stator core is defined as the first side support, and the second support located on the other side of the stator core along the circumference of the stator core is defined as the second side support. Both the first side support and the second side support have snap-fit ​​grooves on both sides along the axial direction of the stator core. Each fixing component has a snap-fit ​​structure. The two fixing components on both sides of the winding assembly along the circumferential direction of the stator core are defined as the first fixing component and the second fixing component. The first side support and the first fixing component are connected to the snap-fit ​​groove through the snap-fit ​​structure, and the second side support and the second fixing component are connected to the snap-fit ​​groove through the snap-fit ​​structure.

22. The stator structure according to claim 21, characterized in that, In the same winding assembly, two adjacent annular windings are connected by a connecting segment. The first support and the second support, which are not connected to the fixed assembly, are defined as third side supports. The third side supports have grooves on both sides along the axial direction of the stator core, and the grooves allow the connecting segment to pass through.

23. The stator structure according to claim 21, characterized in that, Both the first side support and the second side support have chamfered structures extending along the axial direction of the stator core. The chamfered structures are located on the side of the first side support and the second side support that is close to the axis of the stator core. Both the first fixing component and the second fixing component have protruding structures, and each protruding structure abuts against a corresponding chamfered structure.

24. The stator structure according to claim 19, characterized in that, The annular winding includes two ends and two straight segments that abut against the two linear protrusions respectively. One end of the two straight segments is connected through one of the ends, and the other end of the two straight segments is connected through the other end. The first support member is formed with two clamping protrusions for fixing the two ends respectively. The two clamping protrusions are located on both sides of the rectangular protrusion along the axial direction of the stator core.

25. The stator structure according to claim 24, characterized in that, Each of the clamping protrusions has at least one notch, which makes each of the clamping protrusions have a toothed structure.

26. The stator structure according to claim 25, characterized in that, The notch can be filled with cooling medium to cool the end.

27. The stator structure according to claim 19, characterized in that, A winding slot is formed between the linear protrusion and the rectangular protrusion to accommodate at least part of the annular winding. At least one cooling channel is provided on the side wall of the winding slot. The cooling channel extends along the axial direction of the stator core, and the two ends of the cooling channel are respectively connected to the two side surfaces of the first support member along the axial direction of the stator core.

28. The stator structure according to claim 27, characterized in that, The maximum length of the cooling channel along the axial direction of the stator core is less than or equal to the minimum distance between the two ends of the annular winding along the axial direction of the stator core.

29. The stator structure according to claim 17 or 18, characterized in that, A cooling groove is formed on the surface of the first support member away from the axis of the stator core.

30. The stator structure according to claim 17 or 18, characterized in that, The first support member extends along both sides of the stator core axial direction to form two extension plates. The stator structure also includes phase-to-phase jumpers and grounding wires. The extension plates are used to support the phase-to-phase jumpers and the grounding wires.

31. The stator structure according to claim 30, characterized in that, The extension plate has a grounding fixing groove, which is located on the side of the extension plate away from the stator core axis, and the grounding wire is at least partially engaged in the grounding fixing groove.

32. The stator structure according to claim 31, characterized in that, Each of the fixing components has a grounding groove formed on both sides along the axial direction of the stator core, and the grounding groove cooperates with the grounding fixing groove to fix at least a portion of the grounding wire.

33. The stator structure according to claim 30, characterized in that, The extension plate has an interphase fixing groove, which is located on the side of the extension plate near the stator core axis. The interphase jumper wire is at least partially engaged in the interphase fixing groove.

34. The stator structure according to claim 33, characterized in that, Each of the fixing components has a phase-to-phase slot formed on both sides along the axial direction of the stator core, and the phase-to-phase slot cooperates with the phase-to-phase fixing slot to fix at least a portion of the phase-to-phase jumper wire.

35. The stator structure according to claim 16, characterized in that, The toroidal winding includes a multi-turn coil, an inter-turn insulation portion, an insulation layer, a filler layer, and a high-resistance anti-corona layer. An inter-turn insulation portion is provided between two adjacent turns of the coil. The insulation layer wraps the multi-turn coil and the inter-turn insulation portion. The filler layer fills the gap between the insulation layer and the multi-turn coil, as well as the gap between the insulation layer and the inter-turn insulation portion. The high-resistance anti-corona layer wraps around the insulation layer.

36. The stator structure according to claim 1, characterized in that, The stator core has chamfered portions on both sides along its axial direction. The chamfered portions are used to reduce the non-uniform electric field strength of the air in contact with the stator core. The chamfered portions are located at the junction of the inner diameter surface and the side surface of the stator core, and / or the chamfered portions are located at the junction of the outer diameter surface and the side surface of the stator core. The side surface is one side surface of the stator core along its axial direction.

37. The stator structure according to claim 12, characterized in that, The portion of the first fixing member located on the stator core along its radial direction does not contact the stator core, so that a cooling gap for cooling the stator core is formed between this portion and the stator core.

38. The stator structure according to claim 1, characterized in that, The fixing assembly has ventilation openings at both ends along the axial direction of the stator core, with one opening of the ventilation opening facing the stator core.

39. The stator structure according to claim 1, characterized in that, The stator structure also includes lead wire fixing devices, which are used to fix the end lead wires of the winding assembly. The fixing assembly has fixing holes at both ends along the axial direction of the stator core, and each lead wire fixing device is connected to the fixing hole.

40. The stator structure according to claim 39, characterized in that, The lead wire fixing device includes a fixing post and a lead outlet. The fixing post is inserted into the fixing hole, and the lead outlet allows the end lead wire to pass through and fix the end lead wire.

41. The stator structure according to claim 1, characterized in that, The stator structure includes a stator housing, which is arranged around the stator core, the winding assembly, and the fixing assembly, with each fixing assembly abutting against the inner wall of the stator housing.

42. The stator structure according to claim 41, characterized in that, The inner wall of the stator housing is provided with a plurality of fixing grooves extending along the axial direction of the stator core, and each fixing component is at least partially engaged in one of the fixing grooves.

43. An electric motor, characterized in that, It includes a rotor structure and a stator structure as described in any one of claims 1 to 42, the stator structure being disposed around the rotor structure.

44. The motor according to claim 43, characterized in that, The motor is either a synchronous motor or an asynchronous motor.

45. The motor according to claim 43, characterized in that, The rotor structure is a superconducting rotor.

46. ​​The motor according to claim 43, characterized in that, The rotor structure includes: Rotor housing, which encloses and forms a receiving space; The rotor shaft is at least partially located within the receiving space; The rotor core is located within the receiving space and surrounds the outside of the rotor shaft; The rotor winding is located within the receiving space and surrounds the outside of the rotor core; A first sealed space, located within the receiving space, surrounds the outside of the rotor shaft and is used to receive a first refrigerant. A second sealed space is located within the accommodating space. The second sealed space surrounds the outside of the first sealed area and is used to accommodate the second refrigerant. The rotor core and the rotor winding are located within the second sealed space.

47. The motor according to claim 46, characterized in that, The temperature of the first refrigerant is lower than the ambient temperature.

48. The motor according to claim 47, characterized in that, The temperature of the first refrigerant is greater than the temperature of the second refrigerant.

49. The motor according to claim 46, characterized in that, The rotor structure further includes a first inner sealing layer, a first outer sealing layer, and two first end plates. The first outer sealing layer surrounds the outside of the first inner sealing layer. One of the first end plates is connected to one side of the first inner sealing layer along the axial direction of the rotor shaft, and the other side of the first inner sealing layer and the other side of the first outer sealing layer are connected to the other first end plate. The first inner sealing layer, the first outer sealing layer, and the two first end plates surround to form the first sealing space.

50. The motor according to claim 49, characterized in that, The outer surface of the rotor shaft and the outer surface of the first inner sealing layer are defined as the first connecting outer surface, and the inner surface of the first inner sealing layer and the inner surface of the first outer sealing layer are defined as the first connecting inner surface. One of the first connecting inner surface and the first connecting outer surface is provided with a plurality of convex tooth structures, and the other is provided with a plurality of groove structures. Each convex tooth structure and one groove structure overlap radially along the rotor shaft. The rotor shaft and the first inner sealing layer, and the first inner sealing layer and the first outer sealing layer are connected through the convex tooth structure and the groove structure.

51. The motor according to claim 50, characterized in that, The thickness of the toothed structure along the radial direction of the rotor shaft is greater than the thickness of the grooved structure along the radial direction of the rotor shaft, so that the first sealing space is formed between the first inner sealing layer and the first outer sealing layer.

52. The motor according to claim 49, characterized in that, The rotor structure further includes a second inner sealing layer, a second outer sealing layer, and two second end plates. The second outer sealing layer surrounds the outside of the second inner sealing layer. One of the second end plates is connected to one side of the second inner sealing layer along the axial direction of the rotor shaft, and the other side of the second outer sealing layer is connected to the other second end plate. The second inner sealing layer, the second outer sealing layer, and the two second end plates surround to form the second sealing space.

53. The motor according to claim 52, characterized in that, The outer surface of the first outer sealing layer and the outer surface of the second inner sealing layer are defined as the second connecting outer surface, and the inner surface of the second inner sealing layer and the inner surface of the second outer sealing layer are defined as the second connecting inner surface. One of the second connecting inner surface and the second connecting outer surface is provided with a plurality of protruding tooth structures, and the other is provided with a plurality of groove structures. Each of the protruding tooth structures and one of the groove structures overlap radially along the rotor shaft. The first outer sealing layer and the second inner sealing layer, as well as the second inner sealing layer and the second outer sealing layer, are connected by the protruding tooth structures and the groove structures.

54. The motor according to claim 53, characterized in that, The thickness of the toothed structure along the radial direction of the rotor shaft is greater than the thickness of the grooved structure along the radial direction of the rotor shaft, so that a second sealing space is formed between the second inner sealing layer and the second outer sealing layer.

55. The motor according to claim 49, characterized in that, The first inner sealing layer includes a plurality of first inner sealing portions and a plurality of first inner corrugated portions arranged axially along the rotor shaft, with each first inner corrugated portion connected between two adjacent first inner sealing portions.

56. The motor according to claim 49, characterized in that, The first outer sealing layer includes a plurality of first outer sealing portions and a plurality of first outer corrugated portions arranged axially along the rotor shaft, with each first outer corrugated portion connected between two adjacent first outer sealing portions.

57. The motor according to claim 52, characterized in that, The second inner sealing layer includes a plurality of second inner sealing portions and a plurality of second inner corrugated portions arranged axially along the rotor shaft, each of the second inner corrugated portions being connected between two adjacent second inner sealing portions.

58. The motor according to claim 52, characterized in that, The second outer sealing layer includes a plurality of second outer sealing portions and a plurality of second outer corrugated portions arranged axially along the rotor shaft, each of the second outer corrugated portions being connected between two adjacent second outer sealing portions.

59. The motor according to claim 52, characterized in that, The rotor shaft forms multiple shaft fixing holes, the first inner sealing layer forms multiple first inner sealing holes penetrating the first inner sealing layer, the first outer sealing layer forms multiple first outer sealing holes penetrating the first outer sealing layer, the second inner sealing part forms multiple second inner sealing holes penetrating the second inner sealing layer, and the rotor core forms multiple core fixing holes penetrating the rotor core. Each shaft fixing hole overlaps with one first inner sealing hole, one first outer sealing hole, one second inner sealing hole, and one core fixing hole along the radial direction of the rotor shaft and communicates with each other to form a fixing channel. The rotor structure also includes multiple fixed columns, each of which is installed in one of the fixed channels.

60. The motor according to claim 59, characterized in that, Each of the fixed columns includes an inner cylinder, a middle cylinder, an outer cylinder, and a filling column. The middle tube includes a middle tube sleeve portion and a middle tube fixing portion, wherein the middle tube sleeve portion is located inside the inner tube and the middle tube fixing portion is located outside the inner tube; The outer cylinder includes an outer cylinder sleeve portion and an outer cylinder fixing portion, wherein the outer cylinder sleeve portion is located inside the middle cylinder and the outer cylinder fixing portion is located outside the middle cylinder; The filling column includes a filling column sleeve and a filling column fixing part. The filling column sleeve is located inside the outer cylinder, and the filling column fixing part is located outside the outer cylinder. At least a portion of the inner cylinder is connected to the first inner sealing layer, the middle cylinder fixing part is connected to the first outer sealing layer, the outer cylinder fixing part is connected to the second inner sealing layer, and the filling column fixing part is located inside the iron core fixing hole.

61. The motor according to claim 60, characterized in that, The inner cylinder is essentially a hollow cylinder sealed at one end, and the filling column sleeve, the outer cylinder sleeve, the middle cylinder sleeve, and the inner cylinder at least partially overlap along the radial direction of the inner cylinder.

62. The motor according to claim 60, characterized in that, The rotor structure also includes a fixing bolt, at least a portion of which is located in and connected to the iron core fixing hole, and the fixing bolt also abuts against the end of the filling column fixing part away from the filling column sleeve part.

63. The motor according to claim 59, characterized in that, The rotor structure further includes a heat insulation layer assembly, which includes at least one of a first heat insulation layer, a second heat insulation layer, and a third heat insulation layer. The first heat insulation layer is located between the rotor shaft and the first inner sealing layer, the second heat insulation layer is located between the first outer sealing layer and the second inner sealing layer, and the third heat insulation layer is located between the first inner sealing layer and the first outer sealing layer.

64. The motor according to claim 63, characterized in that, A first heat insulation vacuum layer is formed between the rotor shaft and the first heat insulation layer, and a second heat insulation vacuum layer is formed between the first outer sealing layer and the second heat insulation layer.

65. The motor according to claim 63, characterized in that, The outer surface of the rotor shaft, the outer surface of the first heat insulation layer, the outer surface of the first inner sealing layer, the outer surface of the third heat insulation layer, the outer surface of the first outer sealing layer, the outer surface of the second heat insulation layer, and the outer surface of the second inner sealing layer are defined as the third connecting outer surface. The inner surfaces of the first heat insulation layer, the first inner sealing layer, the third heat insulation layer, the first outer sealing layer, the second heat insulation layer, the second inner sealing layer, and the second outer sealing layer are defined as the third connecting inner surface. One of the inner surface and the outer surface of the third connection is provided with a plurality of protruding tooth structures, and the other is provided with a plurality of groove structures. Each of the protruding tooth structures and one of the groove structures overlaps radially along the rotor shaft. The rotor shaft is connected to the first heat insulation layer, the first heat insulation layer is connected to the first inner sealing layer, the first inner sealing layer is connected to the third heat insulation layer, the third heat insulation layer is connected to the first outer sealing layer, the first outer sealing layer is connected to the second heat insulation layer, the second heat insulation layer is connected to the second inner sealing layer, and the second inner sealing layer is connected to the second outer sealing layer through the protruding tooth structures and the groove structures. The thickness of the tooth structure along the radial direction of the rotor shaft is greater than the thickness of the groove structure along the radial direction of the rotor shaft.

66. The motor according to claim 63, characterized in that, The first heat insulation layer includes a plurality of first heat insulation portions distributed along the rotor shaft axis, with a gap between adjacent first heat insulation portions; The second heat insulation layer includes a plurality of second heat insulation portions distributed along the rotor shaft axial direction, with a gap between adjacent second heat insulation portions; The third heat insulation layer includes multiple third heat insulation sections distributed along the rotor shaft axis, with a gap between adjacent third heat insulation sections.

67. The motor according to claim 63, characterized in that, The first heat insulation layer forms a plurality of first heat insulation holes penetrating the first heat insulation layer, the second heat insulation layer forms a plurality of second heat insulation holes penetrating the second heat insulation layer, and the third heat insulation layer forms a plurality of third heat insulation holes penetrating the third heat insulation layer. Each of the said shaft fixing holes, along with a first heat insulation hole, a first inner sealing hole, a third heat insulation hole, a first outer sealing hole, a second heat insulation hole, a second inner sealing hole, and a core fixing hole, overlaps radially along the rotor shaft and communicates with each other to form a fixing channel.

68. The motor according to claim 46, characterized in that, The rotor housing includes a rotor shell layer and two rotor end plates, which are connected to both sides of the rotor shell layer along the axial direction of the rotor shaft.

69. The motor according to claim 68, characterized in that, The rotor shell comprises, from the inside out, a support layer, a shell sealing layer, a shielding layer, and a reinforcing layer. The two rotor end plates are respectively connected to the shell sealing layer on both sides along the rotor shaft axis.

70. The motor according to claim 68, characterized in that, The rotor housing surrounds the outside of the second sealed space and forms a rotor vacuum layer between the first sealed space and the second sealed space.

71. The motor according to claim 69, characterized in that, The support layer is located between the second sealing space and the housing sealing layer.

72. The motor according to claim 69, characterized in that, The support layer has a porous structure, the shielding layer is made of metal, and the reinforcement layer is a fiber-reinforced layer.

73. A device, characterized in that, include: The motor as described in any one of claims 43 to 72.

74. The device according to claim 73, characterized in that, The device is a high-temperature superconducting synchronous condenser, which is used for reactive power compensation in power systems.

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