Synchronous machine stator structure

Abstract

This application discloses a synchronous motor stator structure, comprising an inner shell, an outer shell, end covers, a stator, windings, an air supply device, and connecting members. The inner shell is essentially a hollow cylinder, and the outer shell surrounds the inner shell. Two end covers are provided, each connected to one end of the inner shell along its axial direction, and the other two end covers are also connected to one end of the outer shell along the axial direction of the inner shell. The two end covers, the inner shell, and the outer shell form a receiving space. The stator is installed within the receiving space and connected to the inner shell, and the stator has winding slots. The windings are installed within the winding slots. The air supply device communicates with the receiving space to deliver insulating gas into the receiving space, thereby preventing corona discharge from the windings. The connecting members engage with the openings of the winding slots to seal the winding slots, thus fixing the position of the windings; the connecting members also engage with the inner shell, allowing the force applied to the inner shell to be transmitted to the stator. Through the above arrangement, air corona discharge from the windings can be avoided and the structural strength requirements of the synchronous motor stator structure can be met.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a stator structure for a synchronous motor. Background Technology

[0002] High-voltage motors can carry higher voltages, thus reducing the current intensity within the motor and consequently decreasing line losses, making them advantageous for applications in high-power equipment. However, the stator windings of high-voltage motors can exhibit excessively high local electric field strength, leading to air corona discharge.

[0003] To prevent air corona discharge from the windings from affecting motor performance, existing high-voltage motors immerse the stator in insulating oil to provide anti-corona function. Because the insulating oil and stator structure are quite heavy, the housing supporting them requires high strength, resulting in a thicker housing wall and a larger air gap, which in turn reduces motor performance. Reducing the housing wall thickness to improve performance would lead to insufficient structural strength in the stator structure, failing to meet structural strength requirements. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide a synchronous motor stator structure.

[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, embodiments of this application provide a synchronous motor stator structure, including: Multiple support members, each support member being a circular segment and having the following characteristics: An arc-shaped groove extends circumferentially along the support and penetrates the support; Multiple winding slots, each winding slot passing through the support member along the axial direction and communicating with the arc-shaped slot; Multiple mating parts, each mating part is connected to one side of a support member along its circumference, and the mating parts and the arc-shaped groove do not overlap with the support member along its circumference; Multiple toroidal windings, each toroidal winding is installed in a winding slot; Multiple stator cores, each stator core comprising: The arc-shaped iron core has a snap-fit ​​structure on one side along the circumference. Each arc-shaped iron core is installed in an arc-shaped groove and passed through multiple annular windings. The mounting structure is integrally formed with an arc-shaped iron core. The mounting structure is located on the other side of the arc-shaped iron core along its circumference. The mounting structure and the mating parts abut against each other radially along the arc-shaped iron core. At least part of the side of the mounting structure connected to the arc-shaped iron core abuts against the surface of the mating parts connected to the support. A snap-fit ​​groove is formed on the side of the mounting structure away from the arc-shaped iron core. Two adjacent stator iron cores are snapped into the snap-fit ​​structure through the snap-fit ​​groove. The mounting structure of multiple support components, multiple mating components, and multiple stator cores forms a ring structure along the circumference of the support components.

[0006] In one possible implementation, an installation structure abuts between two adjacent support members.

[0007] In one possible implementation, an insulating layer is fitted onto the arc-shaped iron core, the insulating layer being located between the arc-shaped iron core and the annular winding, and the insulating layer wrapping around the radial and axial surfaces of the arc-shaped iron core.

[0008] In one possible implementation, the mounting structure extends at least partially along the axis of the arcuate core to form an abutment portion that abuts against the insulation layer circumferentially along the arcuate core to restrict circumferential displacement of the insulation layer.

[0009] In one possible implementation, a connecting slot is formed between two adjacent winding slots, the connecting slot being located on one side of the support along its axial direction, and a connecting segment connecting the two adjacent annular windings is connected between two adjacent annular windings, the connecting segment being located within the connecting slot.

[0010] In one possible implementation, the inner wall of each winding slot is formed with multiple end protrusion structures, which are located on both sides of the connecting slot along the radial direction of the support. Each end protrusion structure includes two protrusions, and a fixed space for fixing the annular winding is formed between the two protrusions.

[0011] In one possible implementation, the stator structure of the synchronous motor includes: The cooling structure is a hollow ring-shaped body with a receiving space. The ring-shaped structure is fixed in the receiving space, which can contain coolant. The stator housing encloses the cooling structure.

[0012] In one possible implementation, the mounting structure has a mounting cooling hole that extends through the mounting structure along the axial direction of the arc-shaped iron core, and the mounting cooling hole is connected to the receiving space.

[0013] In one possible implementation, multiple oil channels are formed within the cooling structure, each oil channel being located on one side of a mounting cooling hole along the axial direction of the arc-shaped iron core and communicating with the mounting cooling hole.

[0014] In one possible implementation, the cooling structure includes a cooling body and a cooling cover. The cooling body has a cooling opening for the annular structure to enter. The cooling cover covers the cooling opening and is connected to the cooling body. A liquid storage space is formed on the side of the cooling body away from the cooling opening. The liquid storage space is connected to the containment space and is also connected to at least a portion of a plurality of oil channels.

[0015] In one possible implementation, each support member is further provided with a support cooling channel that extends through the support member along its axial direction, the support cooling channel being connected to the winding slot and also to the accommodating space.

[0016] In one possible implementation, multiple support cooling channels are provided at both ends of the winding slot along the radial direction of the support member; Multiple support cooling channels are provided at both ends of the winding slot along the circumference of the support member; The spacing between at least some of the adjacent support cooling channels is consistent.

[0017] In one possible implementation, the stator housing includes a housing body and an end cover. The housing body has a housing opening for a cooling structure to enter, and the end cover covers the housing opening and is connected to the housing body.

[0018] In one possible implementation, the cooling structure has an inner flange and an outer flange on one side along its axial direction, the inner flange and the outer flange are located on both sides of the cooling structure along its radial direction, and the end cover has two annular grooves that engage with the inner flange and the outer flange respectively.

[0019] In one possible implementation, the cooling structure has a first liquid passage hole at both ends along its axial direction, and the stator housing has a second liquid passage hole at both ends along the axial direction of the cooling structure. The first liquid passage hole and the second liquid passage hole at least partially overlap along the axial direction of the cooling structure, and the first liquid passage hole communicates with the receiving space.

[0020] In the aforementioned synchronous motor stator structure, the inner shell, outer shell, and two end caps form a receiving space, and the winding is located within the receiving space. Insulating gas is supplied to the receiving space through a gas supply device so that the insulating gas can envelop the winding to achieve the insulation and anti-corona function of the winding. At the same time, the connector engages with the slot opening of the winding and also engages with the inner shell, so that the stator can be connected to the inner shell through the connector. This allows the stator to resist the deformation of the inner shell caused by the pressure of the insulating gas through the connector, thereby avoiding deformation of the inner shell and improving the inner shell's ability to resist the pressure of the insulating gas. As a result, a thinner inner shell can meet the structural strength requirements. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the ring-shaped structure according to an embodiment of this application.

[0022] Figure 2 This is a structural diagram of the support component according to an embodiment of this application.

[0023] Figure 3 This is a structural diagram of the first type of stator core according to an embodiment of this application.

[0024] Figure 4This is an assembly diagram of the support member and stator core according to an embodiment of this application.

[0025] Figure 5 This is a structural diagram of the second type of stator core according to an embodiment of this application.

[0026] Figure 6 This is a cross-sectional view of the stator housing according to an embodiment of this application.

[0027] Figure 7 This is a cross-sectional view of the cooling structure according to an embodiment of this application.

[0028] Figure 8 This is a structural diagram of the stator housing according to an embodiment of this application. Detailed Implementation

[0029] 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.

[0030] 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, "a" or "one," 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. Unless otherwise stated, terms such as "front," "back," "left," "right," "lower," and / or "upper" are for illustrative purposes only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0031] 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.

[0032] like Figure 1 and Figure 2As shown, this application provides a synchronous motor stator structure 100, which includes multiple support members 11, multiple mating members 12, multiple annular windings 13, and multiple stator cores 14.

[0033] Multiple support members 11 are used to cooperate with multiple mating members 12, multiple annular windings 13 and multiple stator cores 14 to form an annular structure 10, and are used to connect the mating members 12, annular windings 13 and stator cores 14.

[0034] The mating part 12 is made of insulating material and is connected to the support part 11. It is used to electrically isolate the stator core 14 and the toroidal winding 13.

[0035] In some embodiments, the mating part 12 and the support part 11 are integrally formed.

[0036] The annular winding 13 is at least partially installed within the support 11, and the magnetic field it generates can interact with the rotor magnetic field to enable the superconducting excitation synchronous motor to operate normally.

[0037] The stator core 14 is at least partially installed within the support 11, which is used to generate a stator magnetic field in conjunction with the annular winding 13.

[0038] Specifically, each support member 11 is an annular segment with an arc-shaped groove 111 and multiple winding grooves 112. The arc-shaped groove 111 extends circumferentially along the support member 11 and penetrates the support member 11, and the arc-shaped groove 111 is not connected to the surface of the support member 11 along its axial and radial directions. In the above arrangement, the stator core 14 is at least partially installed in the arc-shaped groove 111 to facilitate the assembly of the stator core 14 and the support member 11. At the same time, it can also fix the relative position of the stator core 14 and the support member 11, thereby improving the stability of the stator core 14 and the support member 11 during installation, thus improving the structural stability of the stator.

[0039] Furthermore, each winding slot 112 extends axially through the support member 11 and communicates with the arc-shaped slot 111, and each annular winding 13 is installed in one winding slot 112. This arrangement causes the annular winding 13 to wrap around the stator core 14, thereby increasing the magnetic reaction area between the annular winding 13 and the stator core 14. This facilitates increasing the magnetic field strength of the stator magnetic field generated by the interaction between the annular winding 13 and the stator core 14, and consequently, improves the power density of the superconducting excitation synchronous motor.

[0040] Meanwhile, each winding slot 112 is not connected to the radial and circumferential surfaces of the support member 11, which can also prevent any ring winding 13 from being connected to other ring windings 13 on the radial or circumferential surfaces of the support member 11. This helps to avoid mutual interference between the ring windings 13 when they are energized, thereby improving the safety of the ring windings 13 when they are conducting.

[0041] In this embodiment, each mating component 12 is connected to one side of a support component 11 along its circumference, and the mating component 12 and the arc-shaped groove 111 do not overlap along the circumference of the support component 11. This arrangement prevents the mating component 12 from obstructing the opening of the arc-shaped groove 111, thus avoiding interference between the mating component 12 and the stator core 14 during assembly with the arc-shaped groove 111.

[0042] As a preferred implementation, the minimum radial distance between the mating part 12 and the inner diameter surface of the support 11 is equal to the minimum radial distance between the arc groove 111 and the inner diameter surface of the support 11. That is, the top surface of the mating part 12 and the bottom surface of the arc groove 111 are located on the same arc surface, so that when the stator core 14 is installed in the arc groove 111, the top surface of the mating part 12 and the surface of the stator core 14 fit together, thereby improving the stability of the stator core 14 assembly.

[0043] It should be noted that the top surface of the mating part 12 is the side surface of the mating part 12 away from the axis of the support part 11, and the bottom surface of the arc groove 111 is the side surface of the arc groove 111 close to the axis of the support part 11.

[0044] In this embodiment, such as Figure 3 and Figure 4 As shown, each stator core 14 includes an arc-shaped core 141 and a mounting structure 142. A snap-fit ​​structure 1411 is formed on one side of the arc-shaped core 141 along the circumferential direction. A snap-fit ​​groove 1421 is formed on the side of the mounting structure 142 away from the arc-shaped core 141. Two adjacent stator cores 14 are snapped into the snap-fit ​​structure 1411 through the snap-fit ​​groove 1421.

[0045] In the above configuration, when two adjacent stator cores 14 are snapped together, the snapping groove 1421 of one stator core 14 is connected to the snapping structure 1411 of the other stator core 14. The snapping of the snapping groove 1421 and the snapping structure 1411 facilitates the connection of the two adjacent stator cores 14, thereby improving the stability of the structure during stator assembly.

[0046] Each arc-shaped iron core 141 is installed within an arc-shaped slot 111 and passes through multiple annular windings 13. Specifically, the arc-shaped iron core 141 passes through all the annular windings 13 within the support member 11 corresponding to its arc-shaped slot 111. In this configuration, the arc-shaped iron core 141 can simultaneously interact with multiple annular windings 13 within the same support member 11, thereby increasing the magnetic field strength of the synchronous motor stator structure 100 and thus improving the power density of the superconducting excitation synchronous motor.

[0047] For example, the snap-fit ​​structure 1411 is a wedge-shaped protrusion, and the snap-fit ​​groove 1421 is a wedge-shaped slot. This configuration allows the surfaces of the snap-fit ​​structure 1411 and the snap-fit ​​groove 1421 to fit together, thereby increasing the contact area when the snap-fit ​​structure 1411 and the snap-fit ​​groove 1421 are connected. This improves the stability of the snap-fit ​​between the snap-fit ​​groove 1421 and the snap-fit ​​structure 1411, and consequently enhances the structural stability of the synchronous motor stator structure 100.

[0048] In this application, it is only necessary to ensure a stable connection between the snap-fit ​​structure 1411 and the snap-fit ​​slot 1421; this application does not impose any restrictions on this.

[0049] For example, the arc-shaped iron core 141 and the arc-shaped groove 111 can be fixed together by an interference fit, or the arc-shaped iron core 141 can be glued and fixed in the arc-shaped groove 111 by an adhesive. In this application, it is only necessary to ensure that the arc-shaped iron core 141 and the arc-shaped groove 111 are fixed to each other, and this application does not impose any restrictions.

[0050] In this embodiment, the mounting structure 142 is integrally formed with an arc-shaped iron core 141. The mounting structure 142 is located on the other side of the arc-shaped iron core 141 along its circumference, that is, on the side of the arc-shaped iron core 141 opposite to the snap-fit ​​structure 1411. The mounting structure 142 and the mating part 12 abut against each other radially along the arc-shaped iron core 141. With the above arrangement, it is convenient to assemble the stator iron core 14 and the support member 11.

[0051] Meanwhile, at least one side of the mounting structure 142 connecting the arc-shaped iron core 141 abuts against the surface of the support member 11 connecting mating member 12. Since the winding slot 112 is not in communication with the circumferential surface of the support member 11, and the surface of the support member 11 connecting mating member 12 is not in communication with the winding slot 112, the above arrangement ensures that the annular winding 13 in the winding slot 112 does not contact the mounting structure 142, thereby achieving insulation between the mounting structure 142 and the annular winding 13.

[0052] In this application, the length of the mounting structure 142 along the axial direction of the arc-shaped iron core 141 is greater than the length of the arc-shaped iron core 141 in its axial direction, that is, the stator iron core 14 extends axially to both sides of the arc-shaped iron core 141, and the length of the mounting structure 142 along the radial direction of the arc-shaped iron core 141 is greater than the length of the arc-shaped iron core 141 in its radial direction, that is, the stator iron core 14 protrudes radially from the arc-shaped iron core 141 (for example, the stator iron core 14 protrudes on the side away from the axis of the arc-shaped iron core 141), so that the mounting structure 142 can abut against the surface of the connecting fitting 12 of the support member 11.

[0053] Furthermore, the length of the mounting structure 142 along the circumference of the arc-shaped iron core 141 is the same as the length of the mating part 12 along the circumference of the arc-shaped iron core 141. When multiple stator iron cores 14 and multiple support members 11 are assembled to form a ring structure 10, the mounting structure 142 is located between two adjacent support members 11. This allows the mounting structure 142 to perform phase-band positioning of the ring winding 13 within the support member 11, thereby preventing displacement of the ring winding 13 along the circumference of the arc-shaped iron core 141 and improving the structural stability during stator assembly. Phase-band positioning refers to the method or process of determining the specific slot number and spatial position of each phase winding when arranging windings in the slots of the motor stator or rotor.

[0054] like Figure 1 As shown, in this embodiment, the mounting structure 142 of multiple support members 11, multiple mating members 12, and multiple stator cores 14 forms an annular structure 10 along the circumference of the support member 11. In the above arrangement, an arc-shaped core 141 is installed in the arc-shaped groove 111 of a support member 11 to fix the relative position of the stator core 14 and the corresponding support member 11. Then, multiple stator cores 14 are fixed to each other by snap-fit ​​grooves 1421 and snap-fit ​​structures 1411 to form an annular structure 10.

[0055] Meanwhile, along the circumference of the arc-shaped iron core 141 in the annular structure 10, the total length of the mounting structure 142 and the support member 11 is equal to the total length of the mating member 12 and the support member 11. This improves the tightness of the connection between the support member 11 and the stator iron core 14, thereby enhancing the structural stability of the annular structure 10, i.e., improving the structural stability of the synchronous motor stator structure 100. Furthermore, in this application, the mating member 12 can be a non-magnetic toothed protrusion. When the support member 11 and the stator iron core 14 are connected and fixed together, there is a gap in the radial direction of the arc-shaped iron core 141 between adjacent support members 11 and the mounting structure 142. The mating member 12 can fill this gap, i.e., fill the space between the phase bands, thereby improving the structural compactness of the annular structure 10 when connected. In addition, the mating member 12 can prevent the mounting structure 142 from connecting with other conductive materials at the aforementioned gaps, thereby achieving insulation between the phase bands.

[0056] In summary, in the stator structure 100 of the synchronous motor, the arc-shaped iron core 141 is installed in the arc-shaped groove 111 to fix the relative position between the stator iron core 14 and the corresponding support member 11; the snap-fit ​​structure 1411 of one stator iron core 14 is snapped into the snap-fit ​​groove 1421 of another stator iron core 14 to fix the relative position of two adjacent stator iron cores 14; the gap when the support member 11 and the mounting structure 142 abut are filled by the mating member 12, so that multiple support members 11, multiple mating members 12 and multiple stator iron cores 14 can be assembled and fixed into a ring structure 10 to improve the structural stability of the ring structure 10, thereby improving the structural stability of the superconducting excitation synchronous motor.

[0057] In one implementation, a mounting structure 142 abuts against each of two adjacent support members 11. In the above configuration, the mounting structure 142 is installed between the phase bands of the annular winding 13, which can realize the positioning of the mating member 12 and the phase bands of the annular winding 13, so as to avoid the armature winding from shifting in the circumferential direction of the arc-shaped iron core 141.

[0058] like Figure 5 As shown, in one embodiment, an insulating layer 15 is sleeved on the arc-shaped iron core 141. The insulating layer 15 is located between the arc-shaped iron core 141 and the annular winding 13, and the insulating layer 15 wraps around the radial and axial surfaces of the arc-shaped iron core 141. Since the winding slot 112 passes through the support member 11 axially and communicates with the arc-shaped slot 111, the annular winding 13 is radially wrapped around the surface of the arc-shaped iron core 141, that is, wrapped around the radial and axial surfaces of the arc-shaped iron core 141. Through the above arrangement, the annular winding 13 can be insulated from the radial surface of the arc-shaped iron core 141, and the annular winding 13 can also be insulated from the axial surface of the arc-shaped iron core 141, thereby insulating the stator core 14 from the annular winding 13. Meanwhile, the insulation layer 15 is not wrapped around the circumferential surface of the arc-shaped iron core 141, so that two adjacent stator iron cores 14 can conduct normally when connected through the snap-fit ​​groove 1421 and the snap-fit ​​structure 1411, which is beneficial to the normal operation of the synchronous motor stator structure 100. Among them, the radial and axial surfaces of each arc-shaped iron core 141 are wrapped with corresponding insulation layers 15.

[0059] For example, the insulation layer 15 can be made of mica soft insulation, which is a composite flexible insulation material made of mica sheets and flexible materials. By wrapping the radial and axial surfaces of the arc-shaped iron core 141 with mica soft insulation, the mica soft insulation can be attached to the surface of the arc-shaped iron core 141, and insulation between the arc-shaped iron core 141 and the annular winding 13 can be achieved.

[0060] In one embodiment, the mounting structure 142 extends at least partially along the axis of the arc-shaped iron core 141 to form an abutment portion 1422. The abutment portion 1422 abuts against the insulating layer 15 circumferentially along the arc-shaped iron core 141 to restrict the circumferential displacement of the insulating layer 15. In the above arrangement, the abutment portion 1422 prevents the insulating layer 15 from interfering with the engagement between two adjacent stator iron cores 14, so that normal conductivity can be achieved when adjacent stator iron cores 14 are connected.

[0061] The length of the abutment portion 1422 along the radial direction of the arc-shaped iron core 141 is equal to the thickness of the insulation layer 15 along the radial direction of the arc-shaped iron core 141, so that the surface of the abutment portion 1422 near the axis of the arc-shaped iron core 141 and the surface of the insulation layer 15 near the axis of the arc-shaped iron core 141 are on the same arc surface, which facilitates the assembly of the stator iron core 14 and the support member 11.

[0062] like Figure 2 As shown, in one embodiment, a connecting groove 113 is formed between two connected winding slots 112. The connecting groove 113 is located on one side of the support member 11 along its axial direction. A connecting segment 131, which connects two adjacent annular windings 13, is located within the connecting groove 113. This arrangement allows the annular windings 13 to be interconnected, facilitating voltage division from any one annular winding 13 to the remaining annular windings 13. This allows a single annular winding 13 to withstand higher voltages, thereby increasing the magnetic field strength generated by the annular winding 13 and ultimately improving the power density of the superconducting excitation synchronous motor.

[0063] The connecting groove 113 can accommodate the wiring segment 131, so that the wiring segment 131 does not protrude from the connecting groove 113, thereby improving the structural compactness of the synchronous motor stator structure 100.

[0064] In one embodiment, the inner wall of each winding slot 112 is formed with a plurality of end protrusions 1122. The plurality of end protrusions 1122 are respectively located on both sides of the connecting slot 113 along the radial direction of the support member 11. Each end protrusion 1122 includes two protrusions 1122a, and a fixing space 1123 for fixing the annular winding 13 is formed between the two protrusions 1122a. With the above arrangement, the positions of the two ends of the annular winding 13 can be fixed, thereby fixing the relative position of the annular winding 13 installed in the winding slot 112, which helps to improve the stability of the annular winding 13 during operation.

[0065] like Figure 6As shown, in one embodiment, the synchronous motor stator structure 100 includes a cooling structure 16 and a stator housing 17. The cooling structure 16 is a hollow annular body forming a receiving space 161. The annular structure 10 is fixed within the receiving space 161, which can contain coolant. The stator housing 17 encloses the cooling structure 16. Through this arrangement, the coolant can enclose the annular structure 10, thereby increasing the contact area between the coolant and the annular structure 10, which improves the heat dissipation effect on the annular structure 10. This, in turn, increases the magnetic field strength of the synchronous motor stator structure 100, and consequently, increases the power density of the superconducting excitation synchronous motor using this stator structure 100. Simultaneously, the stator housing 17 prevents the cooling structure 16 from being affected by the external environment, thus improving the stability of the coolant's heat dissipation of the annular structure 10 within the receiving space 161.

[0066] like Figure 5 and Figure 7 As shown, in one embodiment, the mounting structure 142 has a mounting cooling hole 1423 that extends through the mounting structure 142 along the axial direction of the arc-shaped iron core 141, and the mounting cooling hole 1423 communicates with the receiving space 161. Through this arrangement, the mounting cooling hole 1423 can guide the coolant from the receiving space 161 into the mounting structure 142, thereby increasing the contact area between the coolant and the mounting structure 142, which helps to improve the heat dissipation effect of the coolant on the mounting structure 142, and thus improves the heat dissipation effect of the arc-shaped iron core 141 integrated with the mounting structure 142.

[0067] In one embodiment, the cooling structure 16 has multiple oil channels 162 formed within it. Each oil channel 162 is located on one side of a mounting cooling hole 1423 along the axial direction of the arc-shaped iron core 141 and communicates with the mounting cooling hole 1423. With this arrangement, the oil channels 162 can store coolant, allowing the coolant in the oil channels 162 to be introduced into the mounting cooling hole 1423, thereby enabling the coolant to pass through the mounting cooling hole 1423 and dissipate heat from the mounting structure 142.

[0068] Meanwhile, the oil channel 162 can prevent the cooling structure 16 from blocking the installation cooling hole 1423, so as to facilitate the coolant to enter the installation cooling hole 1423.

[0069] In one embodiment, the cooling structure 16 includes a cooling body 163 and a cooling cover 164. The cooling body 163 has a cooling opening 1631 for the annular structure 10 to enter, and the cooling cover 164 covers the cooling opening 1631 and is connected to the cooling body 163.

[0070] A liquid storage space 1632 is formed on the side of the cooling body 163 away from the cooling opening 1631. The liquid storage space 1632 is in communication with the receiving space 161 and is also in communication with at least a portion of a plurality of oil channels 162. The liquid storage space 1632 stores coolant. In the above arrangement, the coolant can circulate between the liquid storage space 1632 and the receiving space 161 through the oil channels 162, thereby allowing the coolant to cool the annular structure 10.

[0071] It should be noted that at least some of the multiple oil channels 162 refer to the multiple oil channels 162 located on the side of the cooling body 163 away from the cooling opening 1631.

[0072] like Figure 2 As shown, in one embodiment, each support member 11 is also provided with a support cooling channel 114 extending through the support member 11 along its axial direction. The support cooling channel 114 communicates with the winding slot 112 and also communicates with the receiving space 161. With the above arrangement, the coolant can dissipate heat from the annular winding 13 in the winding slot 112 through the support cooling channel 114, which helps to reduce the copper loss of the annular winding 13, thereby reducing the energy consumption of the superconducting excitation synchronous motor during operation.

[0073] It should be noted that the cross-section of the supporting cooling channel 114 along the radial direction of the arc-shaped iron core 141 can be semi-circular or trapezoidal, so that the coolant can dissipate heat from the annular winding 13 in the winding slot 112 through the supporting cooling channel 114. At the same time, the winding slot 112 is connected to the arc-shaped slot 111, so the coolant can enter the arc-shaped slot 111 through the winding slot 112 to cool the stator iron core 14 in the arc-shaped slot 111.

[0074] The supporting cooling channel 114 only needs to meet the normal flow of coolant, and this application does not impose any restrictions on this.

[0075] In some embodiments, the supporting cooling channel 114 may be a semi-circular groove structure, a rectangular groove structure, or the like formed on the sidewall of the winding groove 112.

[0076] In one embodiment, multiple supporting cooling channels 114 are provided at both ends of the winding slot 112 along the radial direction of the support member 11. This arrangement increases the volumetric flow rate of the coolant into the support member 11, thereby improving the cooling effect of the coolant on the annular winding 13 and the stator core 14.

[0077] As a preferred embodiment, insulating cooling oil can be used as the coolant. Insulating cooling oil is a functional liquid used in electrical equipment (such as transformers, reactors, instrument transformers, etc.) to achieve electrical insulation and heat transfer. Pouring the insulating cooling oil into the winding slots 112 through multiple supporting cooling channels 114 can dissipate heat from the ends of the toroidal winding 13 and provide corona protection between the ends of different toroidal windings 13. Furthermore, a thicker layer of mica insulation can be wrapped around the ends of the toroidal windings 13. Mica insulation is an inorganic insulating material used in power equipment; this arrangement further improves the insulation between the ends of the toroidal windings 13.

[0078] Meanwhile, multiple supporting cooling channels 114 are provided at both ends of the winding slot 112 along the circumference of the support member 11. Through the above arrangement, the volumetric flow rate flowing into each winding slot 112 can be increased, thereby improving the cooling effect of the coolant on the annular winding 13 and stator core 14 in each winding slot 112.

[0079] Furthermore, the spacing between at least some of the adjacent support cooling channels 114 is consistent. This arrangement ensures that the volumetric flow rate of coolant into the different support cooling channels 114 is consistent, allowing the coolant to uniformly dissipate heat from the annular windings 13 within the multiple winding slots 112. This avoids large temperature differences between different annular windings 13, thereby improving the stability of the stator's electrical performance.

[0080] In some embodiments, the spacing between two adjacent support cooling channels 114 located at the same end of the winding slot 112 along the radial direction of the support 11 is consistent.

[0081] It should be noted that when assembling the synchronous motor stator structure 100, the annular structure 10 is placed into the receiving space 161 of the cooling structure 16, and the surface of the mounting structure 142 away from the axis of the arc-shaped iron core 141 and the surface of the mating part 12 near the axis of the arc-shaped iron core 141 respectively abut against the inner wall of the cooling structure 16. Additionally, the two radial surfaces of the support member 11 abut against the inner wall of the cooling structure 16, thereby fixing the stator core 14 and supporting the entire annular structure 10. Then, the cooling structure 16 is placed into the stator housing 17, thus completing the assembly of the synchronous motor stator structure 100.

[0082] like Figure 6 and Figure 8As shown, in one embodiment, the stator housing 17 includes a housing body 171 and an end cover 172. The housing body 171 has a housing opening 173 for the cooling structure 16 to enter, and the end cover 172 covers the housing opening 173 and is connected to the housing body 171. With the above arrangement, the housing body 171 can completely enclose the cooling structure 16, thereby preventing the cooling structure 16 from being damaged by the external environment, which helps to improve the stability of the coolant in the cooling structure 16 in dissipating heat from the annular structure 10.

[0083] In one embodiment, the cooling structure 16 has an inner flange 165 and an outer flange 166 formed on one side along its axial direction. The inner flange 165 and the outer flange 166 are located on both sides of the cooling structure 16 along its radial direction. The end cover 172 has two annular grooves 1721, which engage with the inner flange 165 and the outer flange 166 respectively. Through the above arrangement, a Dewar seal can be achieved between the end cover 172 and the inner flange 165 and the outer flange 166, thereby achieving a seal between the stator housing 17 and the cooling structure 16. This further enables the coolant to dissipate heat from the annular structure 10 in a sealed environment, thereby improving the heat dissipation effect of the coolant on the annular structure 10.

[0084] In one embodiment, the cooling structure 16 has first liquid passage holes 167 at both ends along its axial direction, and the stator housing 17 has second liquid passage holes 174 at both ends along the axial direction of the cooling structure 16. The first liquid passage holes 167 and the second liquid passage holes 174 at least partially overlap along the axial direction of the cooling structure 16, and the first liquid passage hole 167 communicates with the receiving space 161. With the above arrangement, the coolant flows into the receiving space 161 through the second liquid passage hole 174 and the first liquid passage hole 167 in sequence, thereby enabling the coolant to cool the annular structure 10.

[0085] As one implementation method, the assembly steps of the synchronous motor stator structure 100 provided in this application are as follows: First, insulation layers 15 are wrapped around multiple arc-shaped iron cores 141. Then, annular windings 13 are placed in the winding slots 112 of each support member 11. Next, each arc-shaped iron core 141 is inserted into the arc-shaped slot 111 of a corresponding support member 11, and each mounting structure 142 abuts against a corresponding mating member 12. Then, the snap-fit ​​structures 1411 and snap-fit ​​slots 1421 of two adjacent stator iron cores 14 are connected, so that multiple stator iron cores 14, multiple support members 11, and annular windings 13 form annular structure 10. The assembled annular structure 10 is placed into the receiving space 161 of the cooling structure 16, and then the cooling structure 16 is placed into the stator housing to complete the assembly of the synchronous motor stator structure 100.

[0086] 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 for a synchronous motor, characterized in that, include: Multiple support members, each of which is an annular segment and has the following characteristics: An arc-shaped groove extends circumferentially along the support member and penetrates the support member; Multiple winding slots, each of the winding slots passing through the support member axially and communicating with the arc-shaped slot; Multiple mating parts, each of the mating parts being connected to one side of a support member along its circumference, wherein the mating parts and the arcuate groove do not overlap along the circumference of the support member; Multiple annular windings, each of the annular windings being mounted in one of the winding slots; Multiple stator cores, each of the stator cores comprising: An arc-shaped iron core has a snap-fit ​​structure formed on one side along the circumference, and each of the arc-shaped iron cores is installed in an arc-shaped groove and passes through multiple of the annular windings; The mounting structure is integrally formed with one of the arc-shaped iron cores. The mounting structure is located on the other side of the arc-shaped iron core along its circumference. The mounting structure and the mating part abut against each other radially along the arc-shaped iron core. At least part of the side of the mounting structure connected to the arc-shaped iron core abuts against the surface of the support member connected to the mating part. A snap-fit ​​groove is formed on the side of the mounting structure away from the arc-shaped iron core. Two adjacent stator iron cores are snapped into the snap-fit ​​structure through the snap-fit ​​groove. The mounting structure of the plurality of support members, the plurality of mating members, and the plurality of stator cores forms an annular structure along the circumference of the support members.

2. The synchronous motor stator structure according to claim 1, characterized in that, The mounting structure abuts against each of the two adjacent support members.

3. The synchronous motor stator structure according to claim 1, characterized in that, An insulating layer is fitted onto the arc-shaped iron core. The insulating layer is located between the arc-shaped iron core and the annular winding, and the insulating layer wraps around the radial and axial surfaces of the arc-shaped iron core.

4. The synchronous motor stator structure according to claim 3, characterized in that, The mounting structure extends at least partially along the axis of the arc-shaped iron core to form an abutment portion, which abuts against the insulating layer circumferentially along the arc-shaped iron core to restrict circumferential displacement of the insulating layer.

5. The synchronous motor stator structure according to claim 1, characterized in that, A connecting groove is formed between two connected winding slots, the connecting groove being located on one side of the support member along its axial direction, and a connecting segment connecting the two adjacent annular windings is provided between adjacent annular windings, the connecting segment being located within the connecting groove.

6. The synchronous motor stator structure according to claim 5, characterized in that, The inner wall of each winding slot has a plurality of end protrusion structures, which are respectively located on both sides of the connecting slot along the radial direction of the support. Each end protrusion structure includes two protrusions, and a fixing space for fixing the annular winding is formed between the two protrusions.

7. The synchronous motor stator structure according to claim 1, characterized in that, The synchronous motor stator structure includes: A cooling structure is a hollow annular body with a receiving space. The annular structure is fixed within the receiving space, which can hold coolant. The stator housing encloses the cooling structure.

8. The synchronous motor stator structure according to claim 7, characterized in that, The mounting structure has a mounting cooling hole that extends through the mounting structure along the axial direction of the arc-shaped iron core, and the mounting cooling hole is connected to the accommodating space.

9. The synchronous motor stator structure according to claim 8, characterized in that, The cooling structure contains a plurality of oil channels, each of which is located on one side of a mounting cooling hole along the axial direction of the arc-shaped iron core and communicates with the mounting cooling hole.

10. The synchronous motor stator structure according to claim 9, characterized in that, The cooling structure includes a cooling body and a cooling cover. The cooling body has a cooling opening for the annular structure to enter. The cooling cover covers the cooling opening and is connected to the cooling body. A liquid storage space is formed on the side of the cooling body away from the cooling opening. The liquid storage space is connected to the receiving space and is also connected to at least a portion of the plurality of oil channels.

11. The synchronous motor stator structure according to claim 7, characterized in that, Each of the support members is also provided with a support cooling channel that extends through the support member along its axial direction. The support cooling channel is connected to the winding slot and also to the receiving space.

12. The synchronous motor stator structure according to claim 11, characterized in that, Multiple support cooling channels are provided at both ends of the winding slot along the radial direction of the support member. The winding slot is provided with multiple support cooling channels at both ends along the circumferential direction of the support member; The spacing between at least some of the adjacent support cooling channels is consistent.

13. The synchronous motor stator structure according to claim 7, characterized in that, The stator housing includes a housing body and an end cover. The housing body has a housing opening for the cooling structure to enter. The end cover covers the housing opening and is connected to the housing body.

14. The synchronous motor stator structure according to claim 13, characterized in that, The cooling structure has an inner flange and an outer flange on one side along its axial direction. The inner flange and the outer flange are located on both sides of the cooling structure along its radial direction. The end cover has two annular grooves, which are respectively engaged with the inner flange and the outer flange.

15. The synchronous motor stator structure according to claim 7, characterized in that, The cooling structure has a first liquid passage hole at both ends along its axial direction, and the stator housing has a second liquid passage hole at both ends along the axial direction of the cooling structure. The first liquid passage hole and the second liquid passage hole overlap at least partially along the axial direction of the cooling structure, and the first liquid passage hole communicates with the accommodating space.

Images