Synchronous machine stator structure

Abstract

The application discloses a synchronous motor stator structure which comprises an inner spiral winding, an outer spiral winding, a stator back iron, a first end plate, a second end plate, a plurality of fixing members and a plurality of positioning columns. The spiral direction of the outer spiral winding is opposite to the spiral direction of the inner spiral winding, and the outer spiral winding is arranged around the inner spiral winding. The stator back iron is in a circular ring body structure and is arranged around the outer spiral winding. The first end plate and the second end plate are both in a circular ring body structure and abut the two ends of the stator back iron along the axial direction of the stator back iron respectively. Each fixing member is connected with the inner spiral winding, and each fixing member is also connected with the outer spiral winding. Each positioning column is arranged in the first end plate, the second end plate and at least one fixing member, so that the plurality of fixing members can fix the positions of the inner spiral winding and the outer spiral winding. Through the above arrangement, a spiral armature winding structure with good structural stability can be formed.

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 to reduce the current intensity in the motor, thereby reducing line losses and making them suitable for high-power equipment. However, traditional linear stator armature structures are difficult to handle end insulation in high-voltage environments, so a spiral armature structure with smaller ends is used.

[0003] In related technologies, helical armature windings are difficult to fix due to their complex winding method, which in turn leads to poor structural stability of helical armature windings. 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: This application provides an embodiment of a hollow armature. In one possible implementation, the inner helical winding and the outer helical winding form multiple crossing positions, and each fixing element fixes the inner helical winding and the outer helical winding at the same crossing position.

[0006] In one possible implementation, each fastener has an inner fixing groove and an outer fixing groove formed on both sides of the first end plate along the radial direction. The inner helical winding is at least partially fixed in the inner fixing groove, and the outer helical winding is at least partially fixed in the outer fixing groove. Each fastener also has a positioning hole for the positioning post to pass through. Along the radial direction of the first end plate, the positioning hole is located between the inner fixing groove and the outer fixing groove.

[0007] In one possible implementation, the fastener forms two inner protrusions on one side of the first end plate along the radial direction, and an inner fixing groove is formed between the two inner protrusions; the fastener forms two outer protrusions on the other side of the first end plate along the radial direction, and an outer fixing groove is formed between the two outer protrusions; a gap is formed between the inner fixing groove and the outer fixing groove, and the gap realizes the insulation between the inner spiral winding and the outer spiral winding.

[0008] In one possible implementation, the synchronous motor stator structure further includes multiple inner cooling pipes extending along the helical direction of the inner helical winding and multiple outer cooling pipes extending along the helical direction of the outer helical winding, with each inner cooling pipe attached to the inner helical winding and each outer cooling pipe attached to the outer helical winding.

[0009] In one possible implementation, each fastener also has at least one inner cooling groove and at least one outer cooling groove, the at least one inner cooling groove being formed on the sidewall of the inner fastener and extending along the helical direction of the inner helical winding, and at least one outer cooling groove being formed on the sidewall of the outer fastener and extending along the helical direction of the outer helical winding; each inner cooling pipe is at least partially mounted in at least one inner cooling groove, and each outer cooling pipe is at least partially mounted in at least one outer cooling groove.

[0010] In one possible implementation, the first end plate extends at least partially radially to form a plurality of positioning portions, each of which is located on the inner diameter surface of the first end plate and arranged around the axis of the first end plate, with each positioning post passing through one positioning portion; the structure of the second end plate is consistent with the structure of the first end plate.

[0011] In one possible implementation, each positioning part has a positioning groove with the opening of the positioning groove located on the side of the first end plate near the inner spiral winding, and each positioning post is inserted through at least one fixing member and located in a positioning groove.

[0012] In one possible implementation, at least a portion of the end of the outer helical winding and at least a portion of the end of the inner helical winding are accommodated between any two adjacent positioning portions.

[0013] In one possible implementation, the stator structure of the synchronous motor includes: The cooling structure is basically a hollow ring shape and forms a space for containing coolant. The first end plate, the second end plate, the inner spiral winding, the outer spiral winding, the stator back iron, and multiple fasteners are all located in the space. The first end plate and the second end plate are both connected to the cooling structure. The stator housing covers the cooling structure.

[0014] In one possible implementation, the cooling structure includes an inner side plate, an outer side plate, and two side covers. The outer side plate is arranged around the inner side plate, and the two side covers are used to close the two ends of the inner side plate and the outer side plate. The outer wall of the side cover is at least partially recessed inward to form a plurality of recesses. The plurality of recesses are arranged around the axis of the cooling structure. A plurality of protrusions are formed on the inner wall of the stator housing, and each protrusion is connected to a recess.

[0015] In one possible implementation, each recess protrudes from the inner wall of the side cover, and the non-protruding portion of the inner wall of the side cover forms an oil storage space communicating with the receiving space. The oil storage space is used to cool the stator back iron, the first end cover, the second end cover, the end of the inner spiral winding, and the end of the outer spiral winding.

[0016] In one possible implementation, the inner wall of the outer side plate protrudes outward at least partially to form a plurality of cooling protrusions, each cooling protrusion forming a cooling space, the plurality of cooling protrusions being arranged around the axis of the cooling structure, each cooling space being connected to an oil storage space, the cooling space being used to cool the stator back iron.

[0017] In one possible implementation, the inner wall of the stator housing has multiple recesses along the axial direction of the cooling structure, each recess accommodating a cooling protrusion; the inner wall of the stator housing also has multiple snap-fit ​​protrusions along the axial direction of the cooling structure, each snap-fit ​​protrusion located between two adjacent cooling protrusions on the outer side plate.

[0018] 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.

[0019] In the aforementioned synchronous motor stator structure, each fixing member is connected to the inner helical winding and also to the outer helical winding. This allows the fixing members to fix the relative positions of the inner and outer helical windings, forming a structurally stable helical armature winding. Furthermore, each positioning post passes through the first end plate, the second end plate, and at least one fixing member to fix the relative positions of the helical winding, the first end plate, and the second end plate. Simultaneously, the stator back iron is sleeved on the outside of the outer helical winding, enabling the stator back iron, the first end plate, the second end plate, the multiple fixing members, and the multiple positioning posts to form a ring structure with good structural stability. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the ring structure according to an embodiment of this application.

[0021] Figure 2 This is an installation structure diagram of the inner and outer helical windings according to an embodiment of this application.

[0022] Figure 3 This is a structural diagram of the fastener according to an embodiment of this application.

[0023] Figure 4 This is a structural diagram of the first end plate in an embodiment of this application.

[0024] Figure 5 This is a structural diagram of the synchronous motor stator structure according to an embodiment of this application.

[0025] Figure 6 This is a cross-sectional view of the synchronous motor stator structure according to an embodiment of this application.

[0026] Figure 7This is a cross-sectional view of the stator housing according to an embodiment of this application. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1 and Figure 2 As shown, this application provides a synchronous motor stator structure 200, which includes an inner helical winding 21, an outer helical winding 22, a stator back iron 23, a first end plate 24, a second end plate 25, a plurality of fixing members 26, and a plurality of positioning posts 27.

[0031] The inner spiral winding 21 and the outer spiral winding 22 can be combined to form a spiral armature winding. The magnetic fields generated by the inner spiral winding 21 and the outer spiral winding 22 are superimposed to generate the stator magnetic field.

[0032] The stator back iron 23, also known as the stator core, is wrapped around the outside of the outer spiral winding 22. The stator back iron 23 is used to cooperate with the spiral armature winding to form a closed magnetic circuit.

[0033] The first end plate 24 and the second end plate 25 are disposed on both sides of the inner helical winding 21, the outer helical winding 22 and the stator back iron 23.

[0034] Each fastener 26 is at least partially installed between the inner helical winding 21 and the outer helical winding 22, and is used to fix the relative positions of the inner helical winding 21 and the outer helical winding 22.

[0035] Each positioning post 27 passes through the helical armature winding and at least one fixing member 26 and connects to the first end plate 24 and the second end plate 25. It is used to fix the fixing member 26 and fix the relative position of the inner helical winding 21 and the outer helical winding 22 through the fixing member 26.

[0036] The aforementioned inner spiral winding 21, outer spiral winding 22, stator back iron 23, first end plate 24, second end plate 25, multiple fixing parts 26, and multiple positioning posts 27 form a ring structure 20.

[0037] Specifically, the helical direction of the outer helical winding 22 is opposite to that of the inner helical winding 21, and the outer helical winding 22 is arranged around the inner helical winding 21. With the above arrangement, when the outer helical winding 22 and the inner helical winding 21 are supplied with current in the same direction, the magnetic fields generated by the outer helical winding 22 and the inner helical winding 21 can be superimposed, thereby increasing the magnetic field strength of the helical armature winding, which is beneficial to increasing the power density of the superconducting excitation winding.

[0038] In this embodiment, the stator back iron 23 has a ring-shaped structure and is arranged around the outer helical winding 22. This arrangement increases the effective cross-sectional area of ​​the stator back iron 23 core, allowing it to guide and constrain more of the magnetic field generated by the outer helical winding 22 and the inner helical winding 21, thus creating a closed magnetic circuit. This, in turn, helps to increase the magnetic flux of the superconducting excitation synchronous motor, thereby increasing its power density.

[0039] Furthermore, both the first end plate 24 and the second end plate 25 are circular ring structures, and the first end plate 24 and the second end plate 25 respectively abut against the two ends of the stator back iron 23 along its axial direction. Through the above arrangement, the first end plate 24 and the second end plate 25 can fix the installation position of the stator back iron 23, thereby preventing the stator back iron 23 from being displaced by magnetic force, which helps to improve the structural stability of the synchronous motor stator structure 200.

[0040] Simultaneously, each fixing member 26 is connected to the inner helical winding 21, and each fixing member 26 is also connected to the outer helical winding 22. In the above configuration, the fixing members 26 can fix the relative position between the inner helical winding 21 and the outer helical winding 22, thereby improving the stability of the superimposed magnetic field generated between the inner helical winding 21 and the outer helical winding 22, which is beneficial to improving the stability of the superconducting excitation synchronous motor operation.

[0041] Furthermore, by installing multiple fasteners 26 between the inner spiral winding 21 and the outer spiral winding 22, uniform gaps can be maintained between the inner spiral winding 21 and the outer spiral winding 22 at different positions. This ensures that the insulation of the inner spiral winding 21 and the outer spiral winding 22 is consistent at different positions, thereby reducing the risk of local electrical breakdown between the inner spiral winding 21 and the outer spiral winding 22.

[0042] Furthermore, in the above configuration, the fixing member 26 can make the spacing between different positions of the inner spiral winding 21 and the outer spiral winding 22 consistent, thereby making the magnetic resistance between different positions of the inner spiral winding 21 and the outer spiral winding 22 consistent, so as to make the magnetic resistance distribution of the inner spiral winding 21 and the outer spiral winding 22 at different positions uniform, thereby avoiding the generation of stray magnetic fields by the inner spiral winding 21 and the outer spiral winding 22, which is conducive to improving the uniformity of the superimposed magnetic field generated by the inner spiral winding 21 and the outer spiral winding 22.

[0043] In addition, multiple fasteners 26 can increase the fastening force between the inner spiral winding 21 and the outer spiral winding 22, thereby improving the structural stability between the inner spiral winding 21 and the outer spiral winding 22, which is beneficial to improving the stability of the synchronous motor stator structure 200.

[0044] In addition, each positioning post 27 passes through the first end plate 24, the second end plate 25, and at least one fixing member 26. The positioning post 27 can fix the relative position of the fixing member 26 between the first end plate 24 and the second end plate 25, thereby allowing the fixing member 26 to fix the position of the inner helical winding 21 and the outer helical winding 22. In the above arrangement, each positioning post 27 can fix the position of the fixing member 26 it passes through relative to the first end plate 24 and the second end plate 25, while the fixing member 26 can fix the relative position of the inner helical winding 21 and the outer helical winding 22 connected to it. This achieves the fixation of the relative positions of the inner helical winding 21, the outer helical winding 22, the multiple fixing members 26, the first end plate 24, and the second end plate 25, thus forming a complete annular structure 20.

[0045] Meanwhile, multiple positioning posts 27 are installed between the inner spiral winding 21 and the outer spiral winding 22 to improve the support force on the inner spiral winding 21 and the outer spiral winding 22, thereby improving the structural stability of the synchronous motor stator structure 200.

[0046] As one implementation method, the assembly of the aforementioned synchronous motor stator structure 200 is as follows: First, the inner helical winding 21 is placed within the space formed by the outer helical winding 22, and multiple fixing members 26 are installed between the inner helical winding 21 and the outer helical winding 22 to fix their relative positions. After fixing the relative positions of the inner helical winding 21 and the outer helical winding 22, positioning posts 27 are passed through the fixing members 26 on the same straight line. The above steps are repeated to insert multiple positioning posts 27 through the fixing members 26 between the inner helical winding 21 and the outer helical winding 22, and the positioning posts 27 are connected to the first end plate 24. Then, the stator back iron 23 is sleeved on the outside of the outer helical winding 22, and the second end plate 25 is connected to the positioning posts 27 to form a ring structure 20.

[0047] In summary, by installing multiple fixing members 26 between the inner helical winding 21 and the outer helical winding 22, the relative positions of the inner helical winding 21 and the outer helical winding 22 are fixed, thereby forming a structurally stable helical armature winding. Positioning posts 27 are used to pass through and connect the fixing members 26, the first end plate 24, and the second end plate 25 to fix the relative positions of the helical winding, the first end plate 24, and the second end plate 25. The stator back iron 23 is sleeved on the outside of the outer helical winding 22, so that the stator back iron 23, the first end plate 24, the second end plate 25, the multiple fixing members 26, and the multiple positioning posts 27 can form a structurally stable annular structure 20.

[0048] In some embodiments, the annular structure 20 may be potted with adhesive to further improve the structural stability of the annular structure 20.

[0049] At this time, the assembly method of the aforementioned annular structure 20 also includes: The inner spiral winding 21, outer spiral winding 22, multiple fixing members 26, and multiple positioning posts 27, which are fixed in relative positions, are placed into a potting container. Epoxy resin is then poured into the potting container to form a potting layer on the surfaces of the inner spiral winding 21, outer spiral winding 22, multiple fixing members 26, and multiple positioning posts 27. This further improves the tightness of the connection between the inner spiral winding 21, outer spiral winding 22, multiple fixing members 26, and multiple positioning posts 27, thereby improving the structural stability of the synchronous motor stator structure 200. Notably, the two ends of each positioning post 27 are not wrapped with epoxy resin during potting, allowing the positioning post 27 to be fixed to the first end plate 24 and the second end plate 25.

[0050] It should be noted that the epoxy adhesive poured in can be epoxy resin adhesive or other types of epoxy adhesive, as long as it can fix the inner spiral winding 21, the outer spiral winding 22, the multiple fixing parts 26 and the multiple positioning posts 27. This application does not impose any restrictions on this.

[0051] In one embodiment, the inner helical winding 21 and the outer helical winding 22 form multiple intersection positions, and each fixing member 26 fixes the inner helical winding 21 and the outer helical winding 22 at the same intersection position. Since the outer surface of the inner helical winding 21 and the inner surface of the outer helical winding 22 overlap radially in the first end plate 24 at the intersection positions, a significant amount of heat is generated in this overlapping area when the inner helical winding 21 and the outer helical winding 22 are conducting. Through this arrangement, the fixing member 26 allows for a gap between the inner helical winding 21 and the outer helical winding 22 at the intersection positions, thereby improving the heat dissipation of the inner helical winding 21 and the outer helical winding 22 at the intersection positions and helping to reduce the copper loss of the inner helical winding 21 and the outer helical winding 22.

[0052] like Figure 3 As shown, in one embodiment, each fastener 26 has an inner fixing groove 261 and an outer fixing groove 262 formed on both sides of the first end plate 24 along the radial direction. Among them, the inner fixing groove 261 is closer to the axis of the first end plate 24 than the outer fixing groove 262 along the radial direction of the first end plate 24.

[0053] The inner spiral winding 21 is at least partially fixed in the inner fixing groove 261, and the outer spiral winding 22 is at least partially fixed in the outer fixing groove 262.

[0054] With the above configuration, since there is a gap between the bottom of the inner fixed groove 261 and the bottom of the outer fixed groove 262 in the radial direction of the first end plate 24, the inner spiral winding 21 and the outer spiral winding 22 can be separated in the radial direction of the first end plate 24, thereby preventing the inner spiral winding 21 and the outer spiral winding 22 from sticking together, which is conducive to achieving insulation between the inner spiral winding 21 and the outer spiral winding 22.

[0055] In this embodiment, each fixing member 26 is also provided with a positioning hole 263 for the positioning post 27 to pass through. With the above arrangement, the positioning post 27 passes through the positioning hole 263 and abuts against the inner wall of the positioning hole 263, thereby enabling the positioning post 27 to apply a supporting force to the fixing member 26, so as to improve the stability of the fixing member 26 when fixing the inner spiral winding 21 and the outer spiral winding 22, and thus improve the structural stability of the synchronous motor stator structure 200.

[0056] Meanwhile, along the radial direction of the first end plate 24, the positioning hole 263 is located between the inner fixing groove 261 and the outer fixing groove 262. This arrangement ensures that the supporting force applied radially by the positioning post 27 to both sides of the fixing member 26 along the first end plate 24 is equal. This prevents the inner spiral winding 21 and the outer spiral winding 22 connected by the fixing member 26 from twisting due to uneven force distribution, thereby improving the uniformity of the gap between the inner spiral winding 21 and the outer spiral winding 22. This, in turn, prevents the inner spiral winding 21 and the outer spiral winding 22 from being electrically broken down locally, thus improving the safety of the inner spiral winding 21 and the outer spiral winding 22 during operation.

[0057] In one embodiment, the fastener 26 has two inner protrusions 264 formed on one side of the first end plate 24 in the radial direction, and an inner fixing groove 261 is formed between the two inner protrusions 264. The fastener 26 has two outer protrusions 265 formed on the other side of the first end plate 24 in the radial direction, and an outer fixing groove 262 is formed between the two outer protrusions 265.

[0058] Specifically, a gap is formed between the inner fixing groove 261 and the outer fixing groove 262, which provides insulation between the inner helical winding 21 and the outer helical winding 22. For the inner helical winding 21 and the outer helical winding 22 to operate normally, a high insulation withstand voltage is required between them. Through this arrangement, the gap prevents the inner helical winding 21 and the outer helical winding 22 from coming into contact at their intersection, thereby meeting the insulation withstand voltage requirements between them and improving their operational stability.

[0059] Meanwhile, the inner protrusion 264 has a radial length greater than that of the inner helical winding 21 along the first end plate 24, thereby increasing the gap between the inner helical winding 21 and the rotor, which facilitates insulation between the inner helical winding 21 and the rotor. Furthermore, the outer protrusion 265 has a radial length greater than that of the outer helical winding 22 along the first end plate 24, thereby increasing the gap between the outer helical winding 22 and the stator back iron 23, which also facilitates insulation between the outer helical winding 22 and the stator back iron 23. In other words, through the above configuration, insulation of the helical armature winding to ground can be achieved.

[0060] It should be noted that in this application, the fixing member 26 is made of insulating material to prevent the inner spiral winding 21 and the outer spiral winding 22 from being electrically connected through the fixing member 26, thereby preventing electrical breakdown when the inner spiral winding 21 and the outer spiral winding 22 are working, which helps to improve the stability of the inner spiral winding 21 and the outer spiral winding 22 during operation.

[0061] It should be noted that in this application, the positioning post 27 is made of insulating material to prevent the inner spiral winding 21 and the outer spiral winding 22 from being electrically connected through the positioning post 27, thereby preventing electrical breakdown when the inner spiral winding 21 and the outer spiral winding 22 are working, which helps to improve the stability of the inner spiral winding 21 and the outer spiral winding 22 during operation.

[0062] It should be noted that in this application, both the first end plate 24 and the second end plate 25 are made of insulating material to prevent the inner spiral winding 21 and the outer spiral winding 22 from being electrically connected through the first end plate 24 and the second end plate 25. This can prevent electrical breakdown when the inner spiral winding 21 and the outer spiral winding 22 are working, thereby improving the stability of the inner spiral winding 21 and the outer spiral winding 22 during operation.

[0063] like Figure 2 and Figure 3 As shown, in one embodiment, the synchronous motor stator structure 200 further includes a plurality of inner cooling pipes 28 extending along the helical direction of the inner helical winding 21 and a plurality of outer cooling pipes 29 extending along the helical direction of the outer helical winding 22. Each inner cooling pipe 28 is attached to the inner helical winding 21, and each outer cooling pipe 29 is attached to the outer helical winding 22. In the above arrangement, the inner helical winding 21 can be cooled by the inner cooling pipes 28, and the outer cooling pipes 29 can be cooled by the outer helical winding 22, thereby improving the heat dissipation effect of the synchronous motor stator structure 200 and helping to reduce the energy consumption of the synchronous motor stator structure 200.

[0064] Meanwhile, by attaching each inner cooling pipe 28 to the inner spiral winding 21 and each outer cooling pipe 29 to the outer spiral winding 22, the contact area between the inner cooling pipe 28 and the inner spiral winding 21, and the contact area between the outer cooling pipe 29 and the outer spiral winding 22, can be increased. This improves the heat dissipation effect on the inner spiral winding 21 and the outer spiral winding 22, further enhancing the heat dissipation effect on the synchronous motor stator structure 200, thereby helping to further reduce the energy consumption of the synchronous motor stator structure 200. In this application, coolant can be introduced into both the inner cooling pipe 28 and the outer cooling pipe 29 to achieve heat dissipation for the inner spiral winding 21 and the outer spiral winding 22.

[0065] In this application, both ends of the inner cooling pipe 28 and the outer cooling pipe 29 are connected to a device for conveying coolant, so that the coolant flows into the annular structure 20 from one end of the inner cooling pipe 28 and the outer cooling pipe 29, and flows out of the annular structure 20 from the other end of the inner cooling pipe 28 and the outer cooling pipe 29, so as to achieve cooling of the inner spiral winding 21 and the outer spiral winding 22.

[0066] In one embodiment, each fixing member 26 is further formed with at least one inner cooling groove 266 and at least one outer cooling groove 267. At least one inner cooling groove 266 is formed on the side wall of the inner fixing groove 261 and extends along the helical direction of the inner helical winding 21. At least one outer cooling groove 267 is formed on the side wall of the outer fixing groove 262 and extends along the helical direction of the outer helical winding 22.

[0067] Specifically, each internal cooling pipe 28 is at least partially installed in at least one internal cooling slot 266, and each external cooling pipe 29 is at least partially installed in at least one external cooling slot 267. Through this arrangement, the internal cooling pipe 28 can be connected to one or more internal cooling slots 266, ensuring that the number of internal cooling slots 266 meets the stability requirements during the installation of the internal cooling pipe 28. It is understood that the connection method between the external cooling pipe 29 and the external cooling slot 267 is a first connection method, and the connection method between the internal cooling pipe 28 and the internal cooling slot 266 is a second connection method; the first connection method is the same as the second connection method.

[0068] Meanwhile, by fixing the inner cooling pipe 28 with multiple inner cooling grooves 266 and fixing the outer cooling pipe 29 with multiple outer cooling grooves 267, fastening forces can be applied to multiple positions of the inner cooling pipe 28 and the outer cooling pipe 29, which helps to improve the stability of the inner spiral winding 21 and the outer spiral winding 22 when the coolant flows in the inner cooling pipe 28 and the outer cooling pipe 29, thereby improving the structural stability of the synchronous motor stator structure 200.

[0069] As a preferred implementation, both sides of the inner spiral winding 21 that contact the inner fixed slot 261 are provided with inner cooling slots 266, so that both sides of the inner spiral winding 21 that contact the inner fixed slot 261 can be cooled by the inner cooling pipes 28. In addition, both sides of the outer spiral winding 22 that contact the outer fixed slot 262 are provided with outer cooling slots 267, so that both sides of the outer spiral winding 22 that contact the outer fixed slot 262 can be cooled by the outer cooling pipes 29. This can improve the heat dissipation effect of the inner spiral winding 21 and the outer spiral winding 22, thereby reducing the energy consumption of the synchronous motor stator structure 200.

[0070] like Figure 2 and Figure 4 As shown, in one embodiment, the first end plate 24 extends at least partially radially to form a plurality of positioning portions 241, with each positioning post 27 passing through one positioning portion 241. This arrangement allows the first end plate 24 to be connected to the plurality of positioning posts 27, thereby increasing the connection strength between the positioning posts 27 and the first end plate 24, which in turn improves the structural stability of the synchronous motor stator structure 200.

[0071] Meanwhile, multiple positioning parts 241 are located on the inner diameter surface of the first end plate 24 and arranged around the axis of the first end plate 24. It should be noted that the inner diameter surface of the first end plate 24 is the surface where the inner circle of the first end plate 24 is located.

[0072] In this application, the structure of the second end plate 25 is the same as that of the first end plate 24, and the cooperation method between the second end plate 25 and the positioning post 27 will not be described here.

[0073] In one embodiment, each positioning part 241 has a positioning groove 2411, the opening of which is located on the side of the first end plate 24 near the inner helical winding 21. Each positioning post 27 passes through at least one fixing member 26 and is located within a positioning groove 2411. This arrangement allows the positioning post 27 passing through the helical armature winding to abut against the bottom of the positioning groove 2411, thereby restricting the positioning post 27 from moving axially along the first end plate 24 and toward the positioning groove 2411.

[0074] It should be noted that in this application, the structure of the second end plate 25 is the same as that of the first end plate 24. Therefore, the first end plate 24 can cooperate with the second end plate 25 to limit the movement of the positioning post 27 along the axial direction of the first end plate 24.

[0075] In one embodiment, at least a portion of the end of the outer helical winding 22 and at least a portion of the end of the inner helical winding 21 are accommodated between any two adjacent positioning portions 241. This arrangement allows the ends of the inner helical winding 21 and the outer helical winding 22 to overlap with the first end plate 24 and the second end plate 25 radially, thereby reducing the axial length of the ends of the inner helical winding 21 and the outer helical winding 22 along the first end plate 24 when assembled with the first end plate 24 and the second end plate 25, thus reducing the space occupancy rate of the synchronous motor stator structure 200.

[0076] Meanwhile, the above-mentioned arrangement also allows the first end plate 24 and the second end plate 25 to restrict the displacement of the end of the inner helical winding 21 and the end of the outer helical winding 22 in the circumferential and radial directions of the first end plate 24, thereby restricting the displacement of the inner helical winding 21 and the outer helical winding 22 in the circumferential and radial directions of the first end plate 24, so as to improve the structural stability of the synchronous motor stator structure 200.

[0077] Furthermore, since the ends of the inner helical winding 21 and the outer helical winding 22 are located between two adjacent positioning portions 241, and the positioning post 27 passes through the inner helical winding 21 and the outer helical winding 22 along the axial direction of the first end plate 24, the positioning post 27 passing through the inner helical winding 21 and the outer helical winding 22 can abut against the bottom of the positioning groove 2411 on the positioning portion 241 only when all the positioning portions 241 are located on the inner diameter surface of the first end plate 24.

[0078] like Figure 5 and Figure 6 As shown, in one embodiment, the synchronous motor stator structure 200 includes a cooling structure 31 and a stator housing 32. The cooling structure 31 is basically a hollow annular shape and forms a space 311 for containing coolant. The first end plate 24, the second end plate 25, the inner spiral winding 21, the outer spiral winding 22, the stator back iron 23, and multiple fixing members 26 are all located within the space 311. Through the above arrangement, the coolant can surround the inner spiral winding 21, the outer spiral winding 22, and the stator back iron 23, thereby improving the heat dissipation effect of the coolant on the inner spiral winding 21, the outer spiral winding 22, and the stator back iron 23, which helps to reduce the energy consumption of the synchronous motor stator structure 200.

[0079] Meanwhile, both the first end plate 24 and the second end plate 25 are connected to the cooling structure 31, so that the annular structure 20 formed by the first end plate 24, the second end plate 25, the inner spiral winding 21, the outer spiral winding 22, the stator back iron 23 and the multiple fixing members 26 can be connected to the cooling structure 31, thereby fixing the annular structure 20 to the cooling structure 31 and improving the stability of the annular structure 20 when the air coolant cools the annular structure 20.

[0080] In this embodiment, the stator housing 32 covers the cooling structure 31. Through this arrangement, the stator housing 32 can protect the cooling structure 31, thereby increasing the service life of the cooling structure 31.

[0081] In some embodiments, the first end plate 24, the second end plate 25, the side cover 314, and the stator housing 32 are all provided with connecting holes. Fasteners can be passed through the connecting holes at corresponding positions of the first end plate 24, the second end plate 25, the side cover 314, and the stator housing 17 to fix the relative positions of the annular structure 20, the cooling structure 31, and the stator housing 17, thereby improving the stability of the synchronous motor stator structure 200.

[0082] like Figure 5 , Figure 6 and Figure 7As shown, in one embodiment, the cooling structure 31 includes an inner side plate 312, an outer side plate 313, and two side covers 314. The outer side plate 313 is arranged around the inner side plate 312, and the two side covers 314 are used to close the two ends of the inner side plate 312 and the outer side plate 313. Through the above arrangement, the cooling structure 31 can form a closed space, allowing the coolant to dissipate heat from the synchronous motor stator structure 200 within the closed space. This helps to avoid interference from the external environment when the coolant dissipates heat from the synchronous motor stator structure 200, thereby improving the stability of the coolant's heat dissipation from the synchronous motor stator structure 200.

[0083] In this embodiment, the outer wall of the side cover 314 is at least partially recessed inward to form a plurality of recesses 3141. These recesses 3141 are arranged around the axis of the cooling structure 31. A plurality of protrusions 321 are formed on the inner wall of the stator housing 32, and each protrusion 321 engages with one recess 3141. This arrangement increases the contact area between the cooling structure 31 and the stator housing 32, thereby improving the connection strength when they are fixed together. This enhances the stability of the cooling structure 31 and, consequently, improves the stability of the cooling fluid's heat dissipation from the synchronous motor stator structure 200. Furthermore, this arrangement prevents circumferential displacement between the cooling structure 31 and the stator housing 32 along the first end plate 24 when they are connected.

[0084] In this application, the connection holes on the cooling structure 31 are located on a plurality of recesses 3141, and the connection holes on the stator housing 32 are located on a plurality of protrusions 321.

[0085] In one embodiment, each recess 3141 protrudes from the inner wall of the side cover 314. The non-protruding portion of the inner wall of the side cover 314 forms an oil storage space 315 communicating with the receiving space 311. The oil storage space 315 is used to cool the stator back iron 23, the first end plate 24, the second end plate 25, the end of the inner spiral winding 21, and the end of the outer spiral winding 22. In the above arrangement, when the annular structure 20 is placed into the cooling structure 31, the ends of the first end plate 24, the second end plate 25, the inner spiral winding 21, and the outer spiral winding 22 are close to the side cover 314, so that at least part of the ends of the first end plate 24, the second end plate 25, the inner spiral winding 21, and the outer spiral winding 22 are located within the oil storage space 315, thereby allowing the coolant in the oil storage space 315 to cool the ends of the first end plate 24, the second end plate 25, the inner spiral winding 21, and the outer spiral winding 22.

[0086] In one embodiment, the inner wall of the outer side plate 313 protrudes outward at least partially to form a plurality of cooling protrusions 3131, each cooling protrusion 3131 forming a cooling space 316. The plurality of cooling protrusions 3131 are arranged around the axis of the cooling structure 31, and each cooling space 316 is connected to the oil storage space 315. The cooling space 316 is used to cool the stator back iron 23. In this application, the stator back iron 23 is wrapped around the outer spiral winding 22. When the annular structure 20 is placed into the cooling structure 31, the side of the stator back iron 23 away from the axis of the first end plate 24 is close to the inner wall of the outer side plate 313, so that the side of the stator back iron 23 away from the axis of the first end plate 24 is at least partially within the cooling space 316. When coolant is introduced into the cooling structure 31, the coolant can flow from the oil storage space 315 into the cooling space 316, thereby allowing the cooling space 316 to cool the stator back iron 23.

[0087] In one embodiment, the inner wall of the stator housing 32 is formed with a plurality of recesses 322 along the axial direction of the cooling structure 31, and each recess 322 accommodates a cooling protrusion 3131.

[0088] The inner wall of the stator housing 32 has a plurality of snap-fit ​​protrusions 323 formed along the axial direction of the cooling structure 31, and each snap-fit ​​protrusion 323 is located between two adjacent cooling protrusions 3131 on the outer side plate 313.

[0089] When the cooling structure 31 is placed inside the stator housing 32, the above-mentioned arrangement can increase the contact area between the inner wall of the stator housing 32 and the outer side plate 313 in the circumferential direction, thereby preventing the cooling structure 31 from shifting in the circumferential direction inside the stator housing 32. This helps to improve the stability of the cooling structure 31 inside the stator housing 32, and further improves the stability of the coolant in the cooling structure 31 in dissipating heat from the synchronous motor stator structure 200.

[0090] In one embodiment, the cooling structure 31 has first liquid passage holes 317 at both ends along its axial direction, and the stator housing 32 has second liquid passage holes 324 at both ends along the axial direction of the cooling structure 31. The first liquid passage holes 317 and the second liquid passage holes 324 at least partially overlap along the axial direction of the cooling structure 31, and the first liquid passage holes 317 communicate with the receiving space 311. With the above arrangement, coolant can flow into the receiving space 311 through the stator housing 32, thereby achieving heat dissipation for the synchronous motor stator structure 200.

[0091] 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: Inner spiral winding; An outer spiral winding has a spiral direction opposite to that of the inner spiral winding, and the outer spiral winding is arranged around the inner spiral winding. The stator back iron has a circular ring structure and is arranged around the outer spiral winding; The first end plate and the second end plate are both ring-shaped and respectively abut against the two ends of the stator back iron along its axial direction. Multiple fasteners, each of which is connected to the inner helical winding and each of which is also connected to the outer helical winding; Multiple positioning posts are provided, each of which passes through the first end plate, the second end plate, and at least one of the fixing members, so that the multiple fixing members can fix the positions of the inner spiral winding and the outer spiral winding.

2. The synchronous motor stator structure according to claim 1, characterized in that, The inner spiral winding and the outer spiral winding have multiple intersection positions, and each fixing member is fixed to the inner spiral winding and the outer spiral winding at the same intersection position.

3. The synchronous motor stator structure according to claim 1 or 2, characterized in that, Each of the fixing members has an inner fixing groove and an outer fixing groove formed on both sides of the radial direction of the first end plate, and the inner helical winding is at least partially fixed in the inner fixing groove, and the outer helical winding is at least partially fixed in the outer fixing groove. Each of the fasteners is also provided with a positioning hole for the positioning post to pass through, and the positioning hole is located between the inner fixing groove and the outer fixing groove along the radial direction of the first end plate.

4. The synchronous motor stator structure according to claim 3, characterized in that, The fastener forms two inner protrusions on one side of the first end plate along the radial direction, and the inner fixing groove is formed between the two inner protrusions; The fastener forms two outward protrusions on the other side of the first end plate along the radial direction, and an outward fixing groove is formed between the two outward protrusions; A gap is formed between the inner fixing groove and the outer fixing groove, and the gap achieves insulation between the inner spiral winding and the outer spiral winding.

5. The synchronous motor stator structure according to claim 3, characterized in that, The synchronous motor stator structure also includes multiple inner cooling pipes extending along the helical direction of the inner helical winding and multiple outer cooling pipes extending along the helical direction of the outer helical winding. Each inner cooling pipe is attached to the inner helical winding, and each outer cooling pipe is attached to the outer helical winding.

6. The synchronous motor stator structure according to claim 5, characterized in that, Each of the fasteners also has at least one inner cooling groove and at least one outer cooling groove, the at least one inner cooling groove being formed on the sidewall of the inner fastening groove and extending along the helical direction of the inner helical winding, and the at least one outer cooling groove being formed on the sidewall of the outer fastening groove and extending along the helical direction of the outer helical winding. Each of the internal cooling pipes is at least partially installed in at least one of the internal cooling tanks, and each of the external cooling pipes is at least partially installed in at least one of the external cooling tanks.

7. The synchronous motor stator structure according to claim 1, characterized in that, The first end plate extends at least partially radially to form a plurality of positioning portions, each of the positioning portions being located on the inner diameter surface of the first end plate and arranged around the axis of the first end plate, with each positioning post passing through one of the positioning portions. The structure of the second end plate is the same as that of the first end plate.

8. The synchronous motor stator structure according to claim 7, characterized in that, Each of the positioning parts has a positioning groove, the opening of the positioning groove is located on the side of the first end plate near the inner spiral winding, and each positioning post passes through at least one of the fixing members and is located in one of the positioning grooves.

9. The synchronous motor stator structure according to claim 7, characterized in that, At least a portion of the end of the outer spiral winding and at least a portion of the end of the inner spiral winding are accommodated between any two adjacent positioning portions.

10. The synchronous motor stator structure according to claim 1, characterized in that, The synchronous motor stator structure includes: The cooling structure is basically a hollow annular shape and forms a space for containing coolant. The first end plate, the second end plate, the inner spiral winding, the outer spiral winding, the stator back iron, and the multiple fixing components are all located in the space. The first end plate and the second end plate are both connected to the cooling structure. Stator housing, which covers the cooling structure.

11. The synchronous motor stator structure according to claim 10, characterized in that, The cooling structure includes an inner side plate, an outer side plate, and two side covers. The outer side plate is arranged around the inner side plate. The two side covers are used to close the two ends of the inner side plate and the outer side plate. The outer wall of the side cover is at least partially recessed inward to form a plurality of recesses. The plurality of recesses are arranged around the axis of the cooling structure. A plurality of protrusions are formed on the inner wall of the stator housing. Each protrusion is connected to one of the recesses.

12. The synchronous motor stator structure according to claim 11, characterized in that, Each of the recesses protrudes from the inner wall of the side cover, and the non-protruding portion of the inner wall of the side cover forms an oil storage space communicating with the receiving space. The oil storage space is used to cool the stator back iron, the first end cover, the second end cover, the end of the inner spiral winding, and the end of the outer spiral winding.

13. The synchronous motor stator structure according to claim 12, characterized in that, The inner wall of the outer side plate protrudes outward at least in part to form a plurality of cooling protrusions, each of which forms a cooling space. The plurality of cooling protrusions are arranged around the axis of the cooling structure, and each of the cooling spaces is connected to the oil storage space. The cooling space is used to cool the stator back iron.

14. The synchronous motor stator structure according to claim 13, characterized in that, The inner wall of the stator housing has a plurality of recesses formed along the axial direction of the cooling structure, and each recess accommodates a cooling protrusion. The inner wall of the stator housing has multiple snap-fit ​​protrusions formed along the axial direction of the cooling structure, and each snap-fit ​​protrusion is located between two adjacent cooling protrusions on the outer side plate.

15. The synchronous motor stator structure according to claim 10, 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.

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