A core, stator assembly, electromagnetic device, powertrain and vehicle

Abstract

This utility model relates to the field of motor technology, and more particularly to an iron core, stator assembly, electromagnetic device, powertrain, and vehicle. The iron core includes a structural body and a cooling section. The structural body has multiple receiving slots for accommodating windings. The cooling section is disposed in at least a portion of the receiving slots and is directly connected to the structural body. The cooling section has a first flow channel adapted to allow cooling medium to pass through. The cooling medium flowing into the first flow channel directly cools the interior of the iron core and the windings. Since the cooling section is in direct contact with the heat source, the iron core has the advantage of excellent cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to an iron core, stator assembly, electromagnetic device, powertrain, and vehicle. Background Technology

[0002] The main components of an electric motor include a stator assembly and a rotor assembly. In some motors, the stator assembly includes windings and an iron core, while the rotor assembly includes a rotor. The windings are mounted on the iron core. When current flows through the windings, a magnetic field is generated. This magnetic field interacts with the rotor assembly, causing the rotor to rotate and converting electrical energy into mechanical energy.

[0003] During motor operation, both the windings and the core generate heat. If this heat is not dissipated in time, the stator assembly will overheat, affecting motor performance. Therefore, cooling of the stator assembly is necessary. However, the cooling effect of the stator assembly in related technologies is poor. Utility Model Content

[0004] This utility model provides an iron core, a stator assembly, an electromagnetic device, a powertrain, and a vehicle to solve the technical problem of poor cooling effect of the stator assembly in the prior art.

[0005] In a first aspect, embodiments of this utility model provide an iron core, the iron core comprising...

[0006] The main body of the structure is provided with multiple receiving slots for accommodating windings;

[0007] A cooling section is disposed in at least part of the receiving tank, the cooling section is directly connected to the main body of the structure, and the cooling section is provided with a first flow channel, the first flow channel being adapted to allow the introduction of a cooling medium.

[0008] In some embodiments, at least one of the receiving tanks is provided with at least two cooling sections, and the at least two cooling sections located in the same receiving tank are spaced apart along a first direction.

[0009] In some embodiments, the main body of the structure is provided with a second flow channel, which is connected to the first flow channel.

[0010] In some embodiments, the second flow channel extends along a second direction, a first opening at one end of the second flow channel is located on a first surface of the main body of the structure, and the other end of the second flow channel is connected to the first flow channel.

[0011] In some embodiments, the main body of the structure includes a yoke and winding teeth. The winding teeth include a plurality of teeth arranged along a third direction. One end of the winding teeth is connected to the yoke, and the other end of the winding teeth extends along the second direction. The receiving groove is formed between two adjacent winding teeth. The yoke is directly connected to the cooling part. The yoke is provided with a second flow channel, which penetrates the yoke along the second direction.

[0012] In some embodiments, in the third-party orientation, the cooling section is located in the middle of the receiving tank.

[0013] In some embodiments, in the second direction, the cooling portion has a dimension of L1 within the receiving groove; the main body of the structure includes a plurality of winding teeth arranged along a third direction, the receiving groove is formed between two adjacent winding teeth, the winding teeth include a tooth portion and a shoe portion, the free end of the tooth portion is connected to the shoe portion, the tooth portion is adapted to wind the winding, the tooth portion has a dimension of L2 in the second direction, and L1 = AL2, where 0.8 ≤ A ≤ 1.2.

[0014] In some embodiments, the core includes a first component and a second component. The first component includes a first main body and a flow channel cover. The second component includes a second main body and a flow channel wall. The first component is disposed at both ends of the second component in a first direction. The flow channel cover is disposed at both ends of the flow channel wall in the first direction to form the first flow channel. The first main body and the second main body are stacked to form at least a portion of the main body of the structure. The flow channel cover and the flow channel wall are stacked to form the cooling portion.

[0015] In some embodiments, the main body of the structure is provided with a second flow channel, and the first flow channel and the second flow channel are connected.

[0016] In some embodiments, the second main body includes a plurality of sub-main bodies, which are spaced apart along a third direction, and a gap is formed between two adjacent sub-main bodies; at least one gap and a first main body located at both ends of the gap in the first direction enclose the second flow channel.

[0017] In some embodiments, the flow channel wall includes a first wall, a second wall, and a third wall, wherein a first end of the first wall is connected to one of two adjacent sub-body portions, a first end of the third wall is connected to the other of the two adjacent sub-body portions, and a second wall is connected between a second end of the first wall and a second end of the third wall.

[0018] In some embodiments, along the second direction, a first surface of the structural body forms a main body groove at the first member and the second member; or, the first surface of the structural body forms a main body groove at the second member; the main body groove communicates with the first flow channel.

[0019] In some embodiments, the first component includes at least two first stacked sheets, or the first component includes at least one first stacked block; the second component includes at least two second stacked sheets, or the second component includes at least one second stacked block.

[0020] Secondly, this utility model embodiment provides a stator assembly, which includes a winding and an iron core as described above, wherein the winding is accommodated in a receiving slot of the iron core.

[0021] In some embodiments, the winding and the cooling portion of the core are in direct contact.

[0022] Thirdly, this utility model embodiment also provides an electromagnetic device, which includes the stator assembly as described above.

[0023] Fourthly, this utility model embodiment also provides a powertrain, which includes the electromagnetic device as described above.

[0024] Fifthly, embodiments of the present invention also provide a vehicle, the vehicle including the electromagnetic device as described above, and / or the powertrain as described above.

[0025] Compared with prior art, the present invention has the following advantages:

[0026] In this embodiment of the invention, the cooling medium introduced into the first flow channel directly cools the interior of the iron core and the windings. The cooling part directly contacts the heat source, giving the iron core the advantage of good cooling effect.

[0027] The iron core provided in this application embodiment has a cooling section disposed in a receiving groove and having a first flow channel, which is directly connected to the iron core and can directly contact the winding. As a cooling structure, the cooling section can not only fully cool the winding but also cool the iron core. Compared with the related technologies where the cooling structure is in direct contact with the winding and indirect contact with the iron core, or indirect contact with the winding and direct contact with the iron core, or indirect contact with both the winding and the iron core, the cooling effect is better.

[0028] Furthermore, in the iron core provided in this application embodiment, the cooling medium in the first flow channel does not contact the winding, reducing the insulation requirements of the cooling medium and increasing the applicability of the iron core. In related technologies, the cooling medium is sprayed onto the winding, or the winding is immersed in the cooling medium. To ensure electrical safety, the cooling medium must be an insulating medium. The cooling medium in the first flow channel of the iron core provided in this application embodiment can be ordinary oil or water, or other cooling media.

[0029] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0031] Figure 1 This is a schematic diagram of the iron core structure in the embodiments of this application. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the iron core structure in the embodiments of this application. Figure 2 ;

[0033] Figure 3 yes Figure 2 A structural schematic diagram of enlarged section A;

[0034] Figure 4 This is a structural schematic diagram of the first component at a first angle in an embodiment of this application;

[0035] Figure 5 This is a structural schematic diagram of the first component at the second angle in an embodiment of this application;

[0036] Figure 6 yes Figure 5 A structural schematic diagram of part B in the enlarged view;

[0037] Figure 7 This is a structural schematic diagram of the second component at the first angle in an embodiment of this application;

[0038] Figure 8 This is a structural schematic diagram of the second component at the second angle in an embodiment of this application;

[0039] Figure 9 yes Figure 8 A structural schematic diagram of the enlarged view of section C;

[0040] Figure 10 This is a schematic diagram of the structure of the third component in the embodiments of this application;

[0041] Figure 11 This is a schematic diagram of the iron core structure in the embodiments of this application. Figure 3 ;

[0042] Figure 12 This is a schematic diagram of the outer shell structure in an embodiment of this application;

[0043] Figure 13 This is a schematic diagram of the connection between the outer shell and the iron core in an embodiment of this application.

[0044] Figure label:

[0045] 10. Yoke; 11. Second flow channel; 12. First opening;

[0046] 20. Winding teeth; 21. Receiving groove; 22. Tooth section; 23. Boot section;

[0047] 30. Cooling section; 31. First flow channel;

[0048] 40. First component; 41. First annular portion; 42. Blocking portion; 43. First toothed portion; 45. First main body portion; 46. Flow channel cover; 44. First laminate;

[0049] 50. Second component; 51. Fan ring portion; 52. U-shaped portion; 53. Gap; 54. Second lamination; 55. Second tooth portion; 56. Through groove; 58. Second main body portion; 581. Sub-main body portion; 59. Flow channel wall; 591. First wall; 592. Second wall; 593. Third wall;

[0050] 60. Third component; 61. Third annular portion; 62. Third toothed portion; 63. Third laminated plate;

[0051] 70. Main structure; 71. First side;

[0052] 80. Outer shell; 81. First flow channel inlet; 82. Second flow channel inlet; 83. Flow channel groove;

[0053] 90. Winding;

[0054] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0055] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0056] Reference Figures 1 to 13 As shown in the embodiment of this application, an iron core is provided. The iron core is suitable for installation inside a motor. The iron core is provided with a cooling structure. When a cooling medium is introduced into the cooling structure, the cooling medium can cool the interior of the iron core. Therefore, it has the advantage of good cooling effect.

[0057] Reference Figures 1 to 3 As shown, in some embodiments, the iron core includes a structural body 70 and a cooling section 30. The structural body 70 is provided with a plurality of receiving slots 21 for accommodating the winding 90. The cooling section 30 is disposed in at least a portion of the receiving slots 21 and is directly connected to the structural body 70. The cooling section 30 is provided with a first flow channel 31, which is adapted to allow cooling medium to pass through. Thus, the cooling medium passing through the first flow channel 31 directly cools the interior of the iron core and the winding 90. The cooling section 30 directly contacts the heat source, giving the iron core the advantage of good cooling effect.

[0058] Understandably, the core of an electromagnetic device is usually made of ferromagnetic material. Due to the induced current generated in the core material in an alternating magnetic field, the core will heat up. When current flows through the winding 90 wound on the core, the winding 90 will also heat up due to the resistance of the winding wires. Therefore, in an electromagnetic device, both the core and the winding 90 are heat sources.

[0059] The iron core provided in this embodiment has a cooling section 30 disposed in the receiving groove 21 and having a first flow channel 31. This cooling section 30 is directly connected to the iron core and can directly contact the winding 90. As a cooling structure, the cooling section 30 can not only fully cool the winding 90 but also cool the iron core. Compared with the related technologies where the cooling structure is in direct contact with the winding 90 and indirect contact with the iron core, or indirect contact with the winding 90 and direct contact with the iron core, or indirect contact with both the winding 90 and the iron core, the cooling effect is better.

[0060] Furthermore, in the iron core provided in this application embodiment, the cooling medium in the first flow channel 31 does not contact the winding 90, reducing the insulation requirements of the cooling medium and increasing the applicability of the iron core. In related technologies, the cooling medium is sprayed onto the winding 90, or the winding 90 is immersed in the cooling medium. To ensure electrical safety, the cooling medium must be an insulating medium. The cooling medium in the first flow channel 31 of the iron core provided in this application embodiment can be ordinary oil or water, or other cooling media.

[0061] In this embodiment of the application, the cooling section 30 is provided in at least part of the receiving groove 21. The cooling section 30 can be provided according to the cooling capacity requirements. For example, when a large cooling capacity is required, all receiving grooves 21 are provided with cooling sections 30; when a smaller cooling capacity is required, some receiving grooves 21 are provided with cooling sections 30, so as to meet the different cooling requirements of the iron core.

[0062] The iron core provided in this embodiment is applicable to rotary motors and linear motors. For rotary motors, the main body 70 of the iron core has a columnar structure, with multiple receiving slots 21 spaced circumferentially around the main body 70. The iron core has a first direction X, a second direction Y, and a third direction Z. The first direction X is the axial direction of the iron core, the second direction Y is the radial direction of the iron core, and the third direction Z is the circumferential direction of the iron core. The linear motor can be a plate motor. For plate motors, the main body 70 of the iron core has a plate-like structure and also has a first direction X, a second direction Y, and a third direction Z. The first direction X is the extension direction of the receiving slots 21 in the iron core, the second direction Y is the thickness direction of the iron core, and the third direction Z is the arrangement direction of the receiving slots 21 in the iron core, which is also the relative movement direction of the iron core between the mover and stator in the linear motor.

[0063] It should be noted that in the embodiment of the rotary electric motor, the second direction Y is the radial direction of the iron core. Figure 5 The image shows only one direction and does not exclude other radial directions in the view.

[0064] In some embodiments, at least two cooling sections 30 are provided in at least one receiving groove 21, and the at least two cooling sections 30 located in the same receiving groove 21 are spaced apart along the first direction X. In this way, after the cooling medium is introduced into the first flow channel 31, the at least two cooling sections 30 can cool the iron core and winding 90 at multiple points and relatively uniformly along the first direction X, effectively avoiding local heating of the iron core and having the advantage of good cooling effect.

[0065] In some embodiments, the main body 70 is provided with a second flow channel 11, which is connected to the first flow channel 31. In the above structure of the present application embodiment, the cooling medium introduced into the second flow channel 11 cools the main body 70 itself and the winding 90, thereby giving the iron core the advantage of good cooling effect.

[0066] In some embodiments, the second flow channel 11 extends along the second direction Y, with a first opening 12 at one end of the second flow channel 11 located on the first surface 71 of the main body 70, and the other end of the second flow channel 11 communicating with the first flow channel 31. In this embodiment, the above-described structural arrangement allows the first flow channel 31 to communicate with the outside of the iron core through the second flow channel 11, thus enabling the inflow and outflow of the cooling medium.

[0067] Since the iron core provided in this application embodiment is applicable to both rotary motors and linear motors, the first surface 71 of the main body 70 in the rotary motor is the outer peripheral surface of the main body 70, and the first surface 71 of the main body 70 in the plate motor is the surface of the main body 70 facing away from the surface where the opening of the receiving groove 21 is located.

[0068] In some embodiments, the main body 70 includes a yoke 10 and winding teeth 20. The winding teeth 20 include a plurality of teeth arranged in the third direction Z along the second surface of the yoke 10. One end of the winding teeth 20 is connected to the yoke 10, and the other end of the winding teeth 20 extends in the second direction Y. A receiving groove 21 is formed between two adjacent winding teeth 20. The yoke 10 is directly connected to the cooling part 30. A second flow channel 11 is provided in the yoke 10. The first opening 12 at one end of the second flow channel 11 is located on the first surface 71 of the yoke 10. The other end of the second flow channel 11 communicates with the first flow channel 31. The second flow channel 11 penetrates the yoke 10 in the second direction Y.

[0069] In this embodiment, the yoke 10 and the winding teeth 20 form the main structural body 70 of the iron core. The yoke 10 provides a magnetic circuit, guides magnetic flux, and supports and protects the iron core and the winding 90. The multiple winding teeth 20 form receiving slots 21 and fix the winding 90, ensuring the stability of the winding 90's position, as well as forming part of the magnetic circuit and concentrating the magnetic flux.

[0070] For the main body 70 of the rotating electric motor, the yoke 10 has a ring-shaped structure. The second surface of the yoke 10 is the inner circumferential surface of the yoke 10. Multiple winding teeth 20 are arranged along the inner circumferential surface of the yoke 10 in the circumferential direction of the iron core. The first surface 71 of the yoke 10 is the outer circumferential surface of the yoke 10.

[0071] For the main body 70 of the linear motor, the yoke 10 has a plate-like structure. The first surface 71 and the second surface of the yoke 10 are two surfaces that are arranged opposite each other in the thickness direction of the yoke 10. The second surface of the yoke 10 is provided with winding teeth 20. Multiple winding teeth 20 are arranged along the third direction Z. The first surface 71 of the yoke 10 is provided with a first opening 12 at one end of the second flow channel 11.

[0072] In some embodiments, refer to Figure 3As shown, it illustrates a structural schematic diagram in which the thickness of the winding tooth 20 is greater than the thickness of the cooling section 30 along the first direction X.

[0073] In this embodiment, the greater the thickness of the cooling section 30, the greater the flow rate of the cooling medium in the first flow channel 31 can be set, and the better the cooling effect. Therefore, the thickness of the cooling section 30 can be set according to the cooling capacity requirements. For example, when a greater cooling capacity is required, the thickness of the cooling section 30 can be set relatively large, or even the thickness of the cooling section 30 can be the same as the thickness of the winding tooth 20; when a relatively smaller cooling capacity is required, the thickness of the cooling section 30 can be set relatively small. Alternatively, at least two cooling sections 30 can be provided in the same receiving groove 21 as described above.

[0074] In some embodiments, in the third direction Z, i.e., in the arrangement direction of the plurality of receiving slots 21, the cooling section 30 is located in the middle of the receiving slot 21. In this way, the distance from the cooling section 30 to the adjacent winding teeth 20 on both sides of the receiving slot 21 is the same, and the cooling section 30 can perform uniform cooling, which has the advantage of good cooling effect.

[0075] In some embodiments, in the direction away from the main body 70, in the second direction Y, the dimension of the cooling section 30 within the receiving groove 21 is L1; the main body 70 includes a plurality of winding teeth 20 arranged along the third direction Z, and a receiving groove 21 is formed between two adjacent winding teeth 20. The winding teeth 20 include a tooth portion 22 and a shoe portion 23. The free end of the tooth portion 22 is connected to the shoe portion 23. The tooth portion 22 is adapted to wind the winding 90, and the dimension of the tooth portion 22 in the second direction Y is L2, where L1 = AL2, and 0.8 ≤ A ≤ 1.2. In the embodiments of this application, when the cooling section 30 and the tooth portion 22 have the above-mentioned range relationship, the cooling section 30 can sufficiently cool the winding 90; it is understood that the cooling section 30 will not protrude beyond the shoe portion 23 in the second direction Y, so as to avoid the cooling section 30 affecting the assembly of other components in the motor with an iron core.

[0076] Understandably, in practical applications, the relationship between the length of the cooling section 30 and the length of the toothed section 22 can be set according to actual usage requirements. For example, A can be one of 0.8, 0.82, 0.84, 0.85, 0.86, 0.88, 0.9, 0.92, 0.94, 0.95, 0.97, 1, 1.05, 1.1, 1.15, or 1.2.

[0077] In some embodiments, the core includes a first component 40 and a second component 50. The first component 40 includes a first main body portion 45 and a flow channel cover 46. The second component 50 includes a second main body portion 58 and a flow channel wall 59. The first component 40 is disposed at both ends of the second component 50 in a first direction X. The flow channel cover 46 covers both ends of the flow channel wall 59 in the first direction X to form a first flow channel 31. The first main body portion 45 and the second main body portion 58 are stacked to form at least a portion of the structural main body 70. The flow channel cover 46 and the flow channel wall 59 are stacked to form a cooling portion 30.

[0078] In the above-described structure of this application embodiment, compared to a one-piece molded iron core, the iron core includes a first component 40 and a second component 50, which simplifies the manufacturing process, improves manufacturability, and ensures the reliability and consistency of the iron core. The first main body portion 45 and the second main body portion 58 are stacked to form the entirety of the main structure, or a portion thereof, while the flow channel cover 46 and the flow channel wall 59 are stacked to form the entirety of the cooling section 30.

[0079] In some embodiments, the second main body 58 includes a plurality of sub-main body portions 581, which are spaced apart along a third direction Z, with a gap 53 formed between adjacent sub-main body portions 581; at least one gap 53 and the first main body portions 45 located at both ends of the gap 53 in the first direction X surround a second flow channel 11. Thus, compared to integral molding of the iron core, stacking to form the second flow channel 11 has the advantages of simple structure and good manufacturability.

[0080] In some embodiments, the flow channel wall 59 includes a first wall 591, a second wall 592 and a third wall 593, a first end of the first wall 591 being connected to one of two adjacent sub-body portions 581 in the third direction Z, a first end of the third wall 593 being connected to the other of two adjacent sub-body portions 581 in the third direction Z, and a second wall 592 being connected between a second end of the first wall 591 and a second end of the third wall 593.

[0081] In this embodiment, the first wall 591, the second wall 592 and the third wall 593 are arranged in a U-shaped structure. A gap 53 is formed between the first end of the first wall 591 and the first end of the third wall 593 facing the two sub-body parts 581, and communication is achieved with the gap 53.

[0082] In this embodiment of the application, the first flow channel 31 is formed by covering the flow channel wall 59 with the flow channel cover 46 at both ends in the first direction X, which can achieve the sealing of the first flow channel 31 and avoid the phenomenon of blockage in the first flow channel 31 due to processes such as impregnation during the manufacturing process.

[0083] In some embodiments, along the second direction Y, the first surface 71 of the structural body 70 forms a body groove (not shown in the figure) at the first member 40 and the second member 50.

[0084] In this embodiment, the main groove can connect multiple second flow channels 11 to facilitate the inflow and outflow of cooling medium.

[0085] In some embodiments, the main body groove extends along the third direction Z. In the main body 70 of the rotary motor, the main body groove is arranged in a ring structure along the third direction Z, or forms an arc structure, etc., depending on the usage requirements.

[0086] In the main body 70 of the rotating motor, the outer diameter of the first component 40 and the outer diameter of the second component 50 are smaller than the maximum outer diameter of the main body 70. The bottom of the main body groove is provided with the first opening 12 of the second flow channel 11, and the main body groove connects all the second flow channels 11 on the same circumference.

[0087] In some embodiments, the first surface 71 of the main body 70 is used to connect with other components such as the housing 80. The housing 80 may be provided with a flow channel or flow channel opening that communicates with the groove of the main body to facilitate the entry of the cooling medium.

[0088] In some embodiments, along the second direction Y, a main body groove is formed on the first surface 71 of the main body 70 at the second member 50. In this embodiment, the main body groove can connect multiple second flow channels 11 to facilitate the inflow and outflow of cooling medium.

[0089] In the main body 70 of the rotating motor, the outer diameter of the second component 50 is smaller than the outer diameter of the first component 40 and the maximum outer diameter of the main body 70. The outer diameter of the first component 40 is the same as the maximum outer diameter of the main body 70. The bottom of the main body groove is provided with the first opening 12 of the second flow channel 11. The main body groove connects all the second flow channels 11 on the same circumference.

[0090] In some embodiments, the first surface 71 of the main body 70 is used to connect with other components such as the housing 80. The housing 80 may be provided with a flow channel or flow channel opening that communicates with the groove of the main body to facilitate the entry of the cooling medium.

[0091] In other embodiments, the first surface 71 of the main body 70 does not have a main body groove; that is, the outer circumferential surface of the main body 70 of the rotary motor does not have a main body groove, and the outer diameters of the first component 40, the second component 50, and the maximum outer diameter of the main body 70 are the same. The first surface 71 of the main body 70 of the linear motor is flat. A flow channel or flow channel opening communicating with the second flow channel 11 may be provided on the outer casing 80 to facilitate the entry of the cooling medium.

[0092] In some embodiments, the core further includes a plurality of third components 60. Along a first direction X, the third components 60, the first component 40, and the second component 50 are stacked, with the first component 40 located between the second component 50 and the third component 60. A first main body portion 45 and a second main body portion 58 are stacked to form a portion of the structural body 70. Thus, compared to a one-piece core, the core including the first component 40, the second component 50, and the third component 60 simplifies the manufacturing process, improves manufacturability, and ensures the reliability and consistency of the core. No cooling portion 30 is formed on the third component 60. The third component 60 includes at least two third laminations 63, or at least one third stack block.

[0093] In this embodiment of the application, at least one second component 50 is stacked between two first components 40 along the first direction X to form a first flow channel 31 and a second flow channel 11. Therefore, the second component 50 will not contact the third component 60, and only the first component 40 will contact the third component 60.

[0094] In some embodiments, the first component 40 includes at least two first laminations 44, or the first component 40 includes at least one first stack. The first component 40 is a lamination or stack structure, and the specific structure of the first component 40 can be set according to usage requirements to meet the setting requirements of different iron cores.

[0095] In the embodiments of this application, the aforementioned stacked sheets can be silicon steel sheets or non-wafer sheets, and the stacked blocks are made of soft magnetic materials, which can be formed by powder metallurgy or 3D printing.

[0096] In some embodiments, the second component 50 includes at least two second laminations 54, or the second component 50 includes at least one second stack. The second component 50 is a lamination or stack structure, and the specific structure of the second component 50 can be configured according to usage requirements to meet the configuration requirements of different iron cores.

[0097] In some embodiments, the first component 40 includes at least two first laminations 44, the second component 50 includes at least two second laminations 54, and the third component 60 includes at least two third laminations 63. Along a first direction X, at least two first laminations 44, at least two second laminations 54, and at least two third laminations 63 are stacked together. The structural body 70 is formed by stacking the first laminations 44, second laminations 54, and third laminations 63. The cooling section 30 is formed by stacking the first laminations 44 and second laminations 54. The structural body 70, formed by stacking the first laminations 44, second laminations 54, and third laminations 63, simplifies the manufacturing process, improves manufacturability, and ensures the reliability and consistency of the core.

[0098] The following example illustrates the application of iron cores in rotating motors.

[0099] In some embodiments, the first stack 44 includes a first annular portion 41, which has an annular structure; the second stack 54 includes a plurality of fan-shaped annular portions 51, which are circumferentially spaced around the iron core, with a gap 53 formed between adjacent fan-shaped annular portions 51; at least one gap 53 of the second stack 54 and the first annular portion 41 of the first stack 44 at its axial ends of the iron core form a second flow channel 11; the first main body portion 45 is formed by the first annular portion 41, and the second main body portion 58 is formed by the fan-shaped annular portions 51. The third stack 63 includes a third annular portion 61, which has an annular structure; the third annular portion 61 and the first annular portion 41 are stacked.

[0100] In the case where a second lamination 54 is stacked between two first laminations 44 along the axial direction of the iron core, the gap 53 and the first annular portions 41 on both sides of the gap 53 form a second flow channel 11. When at least two second laminations 54 are stacked between two first laminations 44, the surface of the first annular portion 41 facing the second lamination 54 and the end face of the fan-shaped annular portion 51 around the circumference of the iron core form a second flow channel 11. The more second laminations 54 stacked between two first laminations 44, the longer the length of the second flow channel 11 along the axial direction of the iron core, and the stronger the cooling capacity of the second flow channel 11.

[0101] In some embodiments, the first stack 44 further includes a plurality of blocking portions 42, one end of which is connected to the radially inner side of the first annular portion 41; the second stack 54 includes a plurality of U-shaped portions 52, the projection profile of the U-shaped portions 52 on the axial direction of the blocking portions 42 is U-shaped, one circumferential side of the U-shaped portion 52 is connected to one of two adjacent fan annular portions 51, and the other circumferential side of the U-shaped portion 52 is connected to the other of two adjacent fan annular portions 51, with the U-shaped portions 52 facing between the corresponding two adjacent fan annular portions 51; the flow channel cover 46 is formed by the blocking portions 42, and the flow channel wall 59 is formed by the U-shaped portions 52.

[0102] In some embodiments, the first lamination 44 further includes a first tooth 43, one end of which is connected to the radially inner side of the first annular portion 41 along the radial direction of the iron core. The second lamination 54 further includes a second tooth 55, the radially inner side of the fan-shaped annular portion 51 being connected to at least one end of the second tooth 55 along the radial direction of the iron core; the third lamination 63 further includes a plurality of third teeth 62, one end of which is connected to the radially inner side of the third annular portion 61. The first tooth 43, the second tooth 55, and the third tooth 62 are stacked axially on the iron core to form a winding tooth 20.

[0103] Specifically, when the radially inner side of the fan ring portion 51 is connected to one end of a second tooth portion 55, cooling portions 30 are respectively provided on both sides of the second tooth portion 55 around the circumference of the main body 70. When the radially inner side of the fan ring portion 51 is connected to one end of at least two second teeth portions 55, cooling portions 30 are respectively provided on both sides of the at least two second teeth portions 55 around the circumference of the iron core. In this way, the positional relationship between the fan ring portion 51 and the second teeth portions 55 can be set according to the cooling capacity requirements. For example, one second tooth portion 55 is provided on each fan ring portion 51, and at least two second teeth portions 55 are provided on each fan ring portion 51 when a smaller cooling capacity is required.

[0104] In some embodiments, the first stack 44 is an integral structural component. Of course, it can also be an assembled structure of a first annular portion 41, multiple blocking portions 42, and multiple first tooth portions 43, depending on the specific usage requirements.

[0105] In some embodiments, the second stack 54 is an integral structural component, and the through groove 56 and gap 53 in the U-shaped part 52 can be formed simultaneously. Of course, it can also be a fan ring part 51, multiple U-shaped parts 52 and multiple second tooth parts 55 assembled structure, which can be set according to the usage requirements.

[0106] In some embodiments, the third lamination 63 is an integral structural component. Of course, it can also be an assembled structure of the third annular portion 61 and multiple third tooth portions 62, depending on the specific usage requirements.

[0107] In some embodiments, the processing of the iron core is as follows:

[0108] The first stack 44, the second stack 54, and the third stack 63 are manufactured respectively using methods that are feasible in current technologies, such as stamping.

[0109] At least one second stack 54 is sandwiched between two first stacks 44, and then they are stacked together with a third stack 63 until an iron core is formed.

[0110] In this embodiment, the first lamination 44, the second lamination 54, and the third lamination 63 are manufactured respectively, and the iron core is formed by stacking them, making the production and manufacturing simpler and more reliable.

[0111] This application embodiment also provides a stator assembly, which includes a winding 90 and an iron core as described above, with the winding 90 housed in a receiving slot 21 of the iron core.

[0112] During operation, the winding 90 and the iron core are the heat sources of the stator assembly. The cooling section 30 is located inside the iron core, and the cooling section 30 of the winding 90 and the iron core are in contact. The cooling section 30 directly cools the winding 90 and the iron core, which has a good cooling effect, thereby enabling the stator assembly to have a good cooling effect.

[0113] This application also provides an electromagnetic device, which includes the stator assembly as described above. It also has the advantage of good cooling effect of the stator assembly, making the electromagnetic device have the advantage of stable performance.

[0114] In some embodiments, the electromagnetic device is an electric motor, such as a linear motor, a rotary motor, etc.

[0115] In some embodiments, the motor further includes a housing 80, which is sleeved on the outside of the stator assembly. The inner wall of the housing 80 is attached to the first surface 71 of the iron core, and the inner wall of the housing 80 and the main body groove on the first surface 71 of the iron core form a third flow channel. The housing 80 is provided with a first flow channel opening 81 and a second flow channel opening 82 penetrating the housing wall. The first flow channel opening 81, the second flow channel opening 82 and the third flow channel are connected, thereby facilitating the entry of the cooling medium and its entry into the stator assembly.

[0116] In other embodiments, the outer casing 80 is provided with a first flow channel opening 81 and a second flow channel opening 82 that penetrate the casing wall, and the inner wall of the outer casing 80 is provided with a flow channel groove 83. The flow channel groove 83 faces the first surface 71 and surrounds the main body groove or the first surface 71 to form a third flow channel. The first flow channel opening 81, the second flow channel opening 82 and the third flow channel are connected, which facilitates the entry of the cooling medium and its entry into the stator assembly.

[0117] This application also provides a powertrain, which includes the electromagnetic device as described above. The powertrain may include the electromagnetic device and a transmission mechanism, which are connected in a driving connection. The transmission mechanism transmits the power from the electromagnetic device to a vehicle or equipment requiring power. The powertrain may also include a power source, an electromagnetic device, and a transmission mechanism, with the power source and / or the electromagnetic device and transmission mechanism connected in a driving connection. The electromagnetic device can be a motor, and the power source can be a motor or an engine. The electromagnetic device has advantages such as good cooling effect and stable performance, giving the powertrain stable performance.

[0118] This application also provides a vehicle that includes the electromagnetic device described above and / or the powertrain described above. The electromagnetic device has the advantages of good cooling effect and stable performance, thereby enabling the vehicle to have stable performance.

[0119] In the embodiments of this application, the iron core, stator assembly, electromagnetic device, powertrain and vehicle can be referenced to each other and have the same or similar beneficial effects as any of the aforementioned iron cores. To avoid repetition, they will not be described again here.

[0120] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0121] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0122] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A core, characterized in that, include, The main body (70) is provided with a plurality of receiving slots (21), which are used to accommodate windings (90); A cooling section (30) is disposed in at least part of the receiving groove (21), the cooling section (30) is directly connected to the main body of the structure (70), the cooling section (30) is provided with a first flow channel (31), the first flow channel (31) is adapted to introduce a cooling medium.

2. The iron core according to claim 1, characterized in that, At least one of the receiving tanks (21) is provided with at least two cooling sections (30), and the at least two cooling sections (30) located in the same receiving tank (21) are spaced apart along a first direction (X).

3. The iron core according to claim 1, characterized in that, The main body (70) is provided with a second flow channel (11), which is connected to the first flow channel (31).

4. The iron core according to claim 3, characterized in that, The second flow channel (11) extends along the second direction (Y), and the first opening (12) at one end of the second flow channel (11) is located on the first surface (71) of the main body of the structure (70). The other end of the second flow channel (11) is connected to the first flow channel (31).

5. The iron core according to claim 4, characterized in that, The main body (70) includes a yoke (10) and winding teeth (20). The winding teeth (20) include a plurality of teeth arranged along a third direction (Z). One end of the winding teeth (20) is connected to the yoke (10), and the other end of the winding teeth (20) extends along the second direction (Y). The receiving groove (21) is formed between two adjacent winding teeth (20). The yoke (10) is directly connected to the cooling section (30), and the yoke (10) is provided with a second flow channel (11), which penetrates the yoke (10) along the second direction (Y).

6. The iron core according to claim 1, characterized in that, In the third direction (Z), the cooling section (30) is located in the middle of the receiving tank (21).

7. The iron core according to claim 1, characterized in that, In the second direction (Y), the cooling section (30) has a dimension of L1 within the receiving groove (21); The main body (70) includes a plurality of winding teeth (20) arranged along the third direction (Z), and the receiving groove (21) is formed between two adjacent winding teeth (20). The winding teeth (20) include a tooth portion (22) and a boot portion (23). The free end of the tooth portion (22) is connected to the boot portion (23). The tooth portion (22) is adapted to wind the winding (90). The dimension of the tooth portion (22) in the second direction (Y) is L2, where L1 = AL2, and 0.8 ≤ A ≤ 1.

2.

8. The iron core according to claim 1, characterized in that, The core includes a first component (40) and a second component (50). The first component (40) includes a first main body (45) and a flow channel cover (46). The second component (50) includes a second main body (58) and a flow channel wall (59). The first component (40) is disposed at both ends of the second component (50) in a first direction (X). The flow channel cover (46) covers the flow channel wall (59) at both ends in the first direction (X) to form the first flow channel (31). The first main body (45) and the second main body (58) are stacked to form at least a portion of the main body (70), and the flow channel cover (46) and the flow channel wall (59) are stacked to form the cooling section (30).

9. The iron core according to claim 8, characterized in that, The main body of the structure (70) is provided with a second flow channel (11), and the first flow channel (31) and the second flow channel (11) are connected.

10. The iron core according to claim 9, characterized in that, The second main body (58) includes a plurality of sub-main bodies (581), which are spaced apart along a third direction (Z), and a gap (53) is formed between two adjacent sub-main bodies (581); At least one of the gaps (53) and a first main body portion (45) located at both ends of the gap (53) in the first direction (X) are configured to form the second flow channel (11).

11. The iron core according to claim 10, characterized in that, The flow channel wall (59) includes a first wall (591), a second wall (592) and a third wall (593). The first end of the first wall (591) is connected to one of the two adjacent sub-body portions (581), the first end of the third wall (593) is connected to the other of the two adjacent sub-body portions (581), and the second wall (592) is connected between the second end of the first wall (591) and the second end of the third wall (593).

12. The iron core according to claim 8, characterized in that, Along the second direction (Y), the first surface (71) of the main body (70) forms a main body groove at the first member (40) and the second member (50); or, The first surface (71) of the main body (70) forms a main body groove at the second component (50); The main groove is connected to the first flow channel (31).

13. The iron core according to claim 8, characterized in that, The first component (40) includes at least two first stacked pieces (44), or the first component (40) includes at least one first stacked block; The second component (50) includes at least two second stacks (54), or the second component (50) includes at least one second stack.

14. A stator assembly, characterized in that, It includes a winding (90) and an iron core as described in any one of claims 1-13, wherein the winding (90) is accommodated in the receiving slot (21).

15. The stator assembly according to claim 14, characterized in that, The winding (90) and the cooling section (30) are in direct contact.

16. An electromagnetic device, characterized in that, Includes the stator assembly as described in claim 14 or 15.

17. A powertrain, characterized in that, Including the electromagnetic device as described in claim 16.

18. A vehicle, characterized in that, Includes the electromagnetic device as described in claim 17, and / or the powertrain as described in claim 16.

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