Motor stator and motor with same

Abstract

The motor stator comprises an iron core assembly, an annular groove is formed in the peripheral surface of the iron core assembly, a plurality of first oil channels and a plurality of second oil channels are distributed in the circumferential direction of the iron core assembly, and the first oil channels and the second oil channels are arranged in a penetrating mode in the length direction of the iron core assembly. At least one of the first oil duct and the second oil duct is communicated with the annular groove, the first oil duct is arranged away from a stator groove in the iron core assembly, and the second oil duct is arranged close to the stator groove; the stator winding is arranged in the stator groove, and part of the stator winding extends out of the stator groove in the length direction of the iron core assembly. According to the oil cooling scheme in the scheme, the stator iron core and the stator winding can be fully cooled.

Description

Technical Field

[0001] This utility model relates to the technical field of electric motors, and more specifically, to an electric motor stator and an electric motor having the stator. Background Technology

[0002] With the continuous development of new energy vehicles, major automakers are increasingly demanding higher performance from the motors used in these vehicles. Drive motors are characterized by their compact structure, high power density, and high efficiency; however, they generate a significant amount of heat during operation, and the motor's heat dissipation and cooling capacity directly impacts its performance.

[0003] Currently, the main cooling method for the stator and windings of oil-cooled motors is to have cooling oil channels in the yoke of the stator core and oil guide rings at both ends of the stator core. Cooling oil flows from the cooling oil channels to the oil guide rings and then is sprayed from the nozzles of the oil guide rings to the ends of the stator windings, thereby achieving cooling of the stator core and windings.

[0004] In the above scheme, the oil passage of the yoke is far from the winding inside the slot, resulting in poor cooling effect on the winding inside the slot. No effective solution has been proposed yet. Utility Model Content

[0005] The main objective of this invention is to provide a motor stator and a motor having the same, in order to solve the technical problem of poor cooling effect of the motor stator through the yoke oil passage in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a motor stator is provided, comprising: a core assembly, wherein an annular groove is formed on the outer peripheral surface of the core assembly, and a plurality of first oil passages and a plurality of second oil passages are distributed circumferentially on the core assembly, the first oil passages and the second oil passages are both disposed through the core assembly along the length direction, at least one of the first oil passages and the second oil passages is connected to the annular groove, wherein the first oil passages are disposed away from the stator slots in the core assembly, and the second oil passages are disposed close to the stator slots; and a stator winding, wherein the stator winding is disposed in the stator slots, and a portion of the stator winding extends out of the stator slots along the length direction of the core assembly.

[0007] Furthermore, the first oil passage is connected to the annular groove, and the second oil passage is connected to the first oil passage.

[0008] Furthermore, the middle part of the first oil passage is connected to the annular groove.

[0009] Furthermore, the core assembly includes: a first core, on which a plurality of oil guide grooves A are distributed circumferentially, the oil guide grooves A being disposed through the length of the first core; and a second core, of which there are two, the two second cores being disposed on opposite sides of the first core, the outer diameter of the second core being larger than the outer diameter of the first core, so that an annular groove is formed between the two second cores, the second core having a plurality of oil guide grooves B and a plurality of oil guide grooves C distributed circumferentially, the oil guide grooves B and C being disposed through the length of the second core, the oil guide grooves B being connected to the annular groove, the first oil passage extending along the length of the oil guide grooves B, the oil guide grooves C being connected to the oil guide grooves A, and the second oil passage extending along the length of the oil guide grooves C.

[0010] Furthermore, the core assembly also includes: a third core, which is connected to one of the second cores. The third core has multiple oil guide grooves D and E distributed circumferentially. Both oil guide grooves D and E are continuous along the length of the third core. Oil guide grooves D and B are connected, and oil guide grooves E and C are connected. The multiple oil guide grooves E include a first oil groove and a second oil groove, with the first oil groove connected to the oil guide groove D. A fourth core is also included, which is connected to the other second core. The fourth iron core has multiple oil guide grooves F and G distributed circumferentially. Both oil guide grooves F and G are arranged to run through the length of the fourth iron core. Oil guide groove F is connected to oil guide groove B, and oil guide groove G is connected to oil guide groove C. Among them, the multiple oil guide grooves G include a third oil groove and a fourth oil groove. The third oil groove is connected to oil guide groove F. Oil guide grooves A, C, E and G together form a second oil channel, and oil guide grooves B, D and F together form a first oil channel.

[0011] Furthermore, the core assembly also includes: a fifth core, which is connected to the third core. The fifth core has multiple injection channels A and multiple injection channels B distributed circumferentially. Injection channels A are connected to the oil outlet of the first oil passage, and injection channels B are connected to the second oil passage.

[0012] Furthermore, the fuel injection channel A is connected to a portion of the fuel guide groove D, and the fuel injection channel B, the second fuel groove, and the third fuel groove are connected to each other.

[0013] Furthermore, the core assembly also includes: a sixth core, which is connected to the fourth core. The sixth core has multiple oil injection channels C and multiple oil injection channels D distributed circumferentially. The oil injection channels C are connected to the oil outlet of the first oil passage, and the oil injection channels D are connected to the second oil passage.

[0014] Furthermore, the fuel injection channel C is connected to a portion of the fuel guide groove F, and the fuel injection channel D, the fourth fuel groove, and the first fuel groove are connected to each other.

[0015] According to another aspect of the present invention, an electric motor is provided, the electric motor including a motor stator as described above.

[0016] Applying the technical solution of this utility model, the second oil channel is located close to the stator slot, while the first oil channel is located away from the stator slot. An annular groove serves as an oil inlet, communicating with the first and / or second oil channels to provide cooling oil. This allows the cooling oil in the second oil channel to cool the stator core and the windings in the stator slots, and the cooling oil in the first oil channel to cool the yoke of the stator core. The oil cooling solution described above can adequately cool the stator core and stator windings. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of a motor stator according to the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure of a second embodiment of the motor stator according to the present invention is shown;

[0020] Figure 3 A schematic diagram of the structure of a third embodiment of the motor stator according to the present invention is shown;

[0021] Figure 4 A schematic diagram of the structure of a fourth embodiment of the motor stator according to the present invention is shown;

[0022] Figure 5 A schematic diagram of the structure of a fifth embodiment of the motor stator according to the present invention is shown;

[0023] Figure 6 A schematic diagram of the structure of a sixth embodiment of the motor stator according to the present invention is shown;

[0024] Figure 7 A schematic diagram of the structure of a seventh embodiment of a motor stator according to the present invention is shown;

[0025] Figure 8 A schematic diagram of the structure of an eighth embodiment of the motor stator according to the present invention is shown.

[0026] The above figures include the following reference numerals:

[0027] 1. Annular groove;

[0028] 2. Stator slots;

[0029] 3. Stator windings;

[0030] 4. First iron core;

[0031] 41. Oil guide groove A;

[0032] 5. Second iron core;

[0033] 51. Oil guide groove B; 52. Oil guide groove C;

[0034] 6. Third iron core;

[0035] 61. Oil guide groove D; 62. Oil guide groove E; 621. First oil groove; 622. Second oil groove;

[0036] 7. Fourth iron core;

[0037] 71. Oil guide groove F; 72. Oil guide groove G; 721. Third oil groove; 722. Fourth oil groove;

[0038] 8. Fifth iron core;

[0039] 81. Injection channel A; 82. Injection channel B;

[0040] 9. The sixth iron core;

[0041] 91. Injection channel C; 92. Injection channel D;

[0042] 10. Shell. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0047] Combination Figures 1 to 8 As shown, according to a specific embodiment of this application, a motor stator is provided.

[0048] Specifically, the motor stator includes a core assembly and a stator winding 3. An annular groove 1 is formed on the outer circumferential surface of the core assembly. Multiple first oil passages and multiple second oil passages are distributed circumferentially on the core assembly. Both the first and second oil passages are arranged to extend along the length of the core assembly. At least one of the first and second oil passages communicates with the annular groove 1. The first oil passages are located away from the stator slots 2 within the core assembly, while the second oil passages are located close to the stator slots 2. The stator winding 3 is disposed within the stator slots 2, and a portion of the stator winding 3 extends along the length of the core assembly beyond the stator slots 2.

[0049] In the embodiments of this application, the second oil channel is disposed near the stator slot 2, and the first oil channel is disposed away from the stator slot 2. The annular groove 1 serves as an oil inlet communicating with the first oil channel and / or the second oil channel to provide cooling oil to the first oil channel and / or the second oil channel. This allows the cooling oil in the second oil channel to cool the stator core and the windings in the stator slot 2, and the cooling oil in the first oil channel to cool the yoke of the stator core. The oil cooling scheme described above can adequately cool the stator core and the stator windings 3.

[0050] In the embodiments of this application, the first oil channel is connected to the annular groove 1, and the second oil channel is connected to the first oil channel. That is, the first oil channel is located on the outer ring of the core assembly. Cooling oil flows into the first oil groove 621 after passing through the annular groove 1. Under the action of gravity, the cooling oil in the first oil channel flows into the second oil channel to fully cool the stator core and stator winding 3.

[0051] As an alternative implementation, both the first oil passage and the second oil passage are connected to the annular groove 1, that is, the cooling oil passes through the annular groove 1 and then connects with the first oil passage and the second oil passage respectively, so as to fully cool the stator core and the stator winding 3.

[0052] Preferably, the middle part of the first oil passage is connected to the annular groove 1. After the cooling oil enters the first oil passage, it forms two branches. One branch flows to the left along the length of the first oil passage, and the other branch flows to the right along the length of the first oil passage to accelerate the cooling speed of the stator core.

[0053] In the embodiments of this application, the core assembly includes a first core 4 and a second core 5. The first core 4 has a plurality of oil guide grooves A41 distributed circumferentially, and the oil guide grooves A41 are arranged through the length of the first core 4. There are two second cores 5, located on opposite sides of the first core 4. The outer diameter of the second core 5 is larger than the outer diameter of the first core 4, so that an annular groove 1 is formed between the two second cores 5. The second core 5 has a plurality of oil guide grooves B51 and C52 distributed circumferentially, and both oil guide grooves B51 and C52 are arranged through the length of the second core 5. Oil guide groove B51 communicates with the annular groove 1. A first oil channel extends along the length of oil guide groove B51, and oil guide groove C52 communicates with oil guide groove A41. A second oil channel extends along the length of oil guide groove C52.

[0054] Specifically, such as Figure 6 , Figure 7 , Figure 8As shown, multiple oil guide grooves B51 are evenly arranged along the circumference of the second iron core 5, multiple oil guide grooves C52 are evenly arranged along the circumference of the second iron core 5, and multiple oil guide grooves A41 are evenly arranged along the circumference of the first iron core 4. In the radial direction of the second iron core 5, oil guide grooves B51 and C52 are arranged in a one-to-one correspondence, and oil guide grooves A41 and C52 are also arranged in a one-to-one correspondence. Oil guide groove B51 is a component of the first oil passage, meaning that the cooling oil of the first oil passage flows through oil guide groove B51; oil guide grooves A41 and C52 are components of the second oil passage, meaning that the cooling oil of the second oil passage flows through oil guide grooves A41 and C52. The number of slots in the first iron core 4 is the same as the number of slots in the second iron core 5, and the stator slots 2 of the first iron core 4 and the stator slots 2 of the second iron core 5 are arranged in a one-to-one correspondence. Taking the second iron core 5 as an example: the second iron core 5 has multiple teeth, and a stator slot 2 is formed between two adjacent teeth. An oil guide groove C52 is opened at the root of the teeth and corresponds one-to-one with the teeth of the second iron core 5, so that the cooling oil flowing through the oil guide groove C52 can fully cool the stator winding 3. Preferably, the second iron core 5 is composed of multiple stacked silicon steel sheets, with the oil guide grooves B51 on two adjacent silicon steel sheets being staggered and connected circumferentially, and the oil guide grooves C52 on two adjacent silicon steel sheets being staggered and connected circumferentially. This arrangement increases the disturbance to the coolant, thereby improving the cooling effect.

[0055] Furthermore, the core assembly also includes a third core 6 and a fourth core 7. The third core 6 is connected to one of the second cores 5. The third core 6 has multiple oil guide grooves D61 and multiple oil guide grooves E62 distributed circumferentially. Both oil guide grooves D61 and E62 are arranged through each other along the length of the third core 6. Oil guide groove D61 is connected to oil guide groove B51, and oil guide groove E62 is connected to oil guide groove C52. Among them, the multiple oil guide grooves E62 include a first oil groove 621 and a second oil groove 622. The first oil groove 621 is connected to the oil guide groove D61. The fourth iron core 7 is connected to another second iron core 5. The fourth iron core 7 has multiple oil guide grooves F71 and G72 distributed circumferentially. Both oil guide grooves F71 and G72 are arranged to extend along the length of the fourth iron core 7. Oil guide groove F71 is connected to oil guide groove B51, and oil guide groove G72 is connected to oil guide groove C52. The multiple oil guide grooves G72 include a third oil groove 721 and a fourth oil groove 722. The third oil groove 721 is connected to oil guide groove F71. Oil guide grooves A41, C52, E62, and G72 together form a second oil channel, while oil guide grooves B51, D61, and F71 together form a first oil channel. The arrangement of the third iron core 6 and the fourth iron core 7 connects the first and second oil channels, thereby providing sufficient cooling for the stator winding 3.

[0056] Specifically, such as Figure 4 , Figure 8 As shown, the number of slots in the third iron core 6 is the same as the number of slots in the second iron core 5, and the stator slots 2 of the third iron core 6 and the stator slots 2 of the second iron core 5 are set in a one-to-one correspondence. Multiple oil guide grooves D61 are evenly arranged along the circumference of the third iron core 6, and multiple oil guide grooves E62 are evenly arranged along the circumference of the third iron core 6. In the radial direction of the third iron core 6, oil guide grooves D61 and E62 are arranged in a one-to-one correspondence. In the axial direction of the third iron core 6, oil guide grooves D61 and B51 are arranged in a one-to-one correspondence, and oil guide grooves E62 and C52 are arranged in a one-to-one correspondence. Among them, oil guide groove E62 includes a first oil groove 621 and a second oil groove 622. The first oil groove 621 and the second oil groove 622 are staggered along the circumference of the third iron core 6, that is, the first oil groove 621 is located between two second oil grooves 622, and the second oil groove 622 is located between two first oil grooves 621. The first oil groove 621 is connected to the oil guide groove D61 so that the cooling oil in the oil guide groove B51 flows into the oil guide groove C52 after passing through the oil guide groove D61, thereby realizing the connection between the first oil passage and the second oil passage.

[0057] Specifically, such as Figure 6 , Figure 7 As shown, the number of slots in the fourth iron core 7 is the same as the number of slots in the second iron core 5, and the stator slots 2 of the fourth iron core 7 and the stator slots 2 of the second iron core 5 are set in a one-to-one correspondence. Multiple oil guide grooves F71 are evenly arranged along the circumference of the fourth iron core 7, and multiple oil guide grooves G72 are evenly arranged along the circumference of the fourth iron core 7. In the radial direction of the fourth iron core 7, oil guide grooves F71 and G72 are arranged one-to-one; in the axial direction of the fourth iron core 7, oil guide grooves F71 and B51 are arranged one-to-one, and oil guide grooves G72 and C52 are arranged one-to-one. Among them, oil guide groove G72 includes a third oil groove 721 and a fourth oil groove 722. The third oil groove 721 and the fourth oil groove 722 are staggered along the circumference of the fourth iron core 7, that is, the third oil groove 721 is located between two fourth oil grooves 722, and the fourth oil groove 722 is located between two third oil grooves 721. The third oil groove 721 is connected to the oil guide groove F71 so that the cooling oil in the oil guide groove B51 flows into the oil guide groove C52 after passing through the oil guide groove F71, thereby realizing the connection between the first oil passage and the second oil passage. Furthermore, the core assembly also includes a fifth core 8, which is connected to the third core 6. The fifth core 8 has multiple injection channels A81 and multiple injection channels B82 distributed circumferentially. Injection channels A81 are connected to the outlet of the first oil passage, and injection channels B82 are connected to the second oil passage. Injection channel A81 is connected to a portion of the oil guide groove D61, and injection channels B82, the second oil groove 622, and the third oil groove 721 are connected. Specifically, the oil guide groove D61 connected to the first oil groove 621 is not connected to injection channel A81, and the oil guide groove D61 not connected to the first oil groove 621 is connected to injection channel A81.

[0058] Specifically, such as Figure 2 , Figure 7 As shown, the number of slots in the fifth core 8 is the same as the number of slots in the third core 6, and the stator slots 2 of the fifth core 8 and the stator slots 2 of the third core 6 are arranged in a one-to-one correspondence. Multiple oil injection channels A81 are evenly arranged circumferentially along the fifth core 8, and multiple oil injection channels B82 are also evenly arranged circumferentially along the fifth core 8. In the radial direction of the fifth core 8, oil injection channels A81 and B82 are arranged in a one-to-one correspondence. Oil injection channels B82 are arranged in a one-to-one correspondence with the second oil groove 622 and the third oil groove 721. The fifth core 8 blocks the first oil groove 621, so that the cooling oil in the first oil channel flows sequentially through the oil guide groove F71, the third oil groove 721, the oil guide groove C52, the oil guide groove A41, the oil guide groove C52, and the second oil groove 622 before flowing out from the oil injection channel B82 to cool the stator winding 3 at the end. Cooling oil in the first oil passage is sprayed out from the injection channel A81. Figure 7 The direction of the middle arrow indicates the flow direction of the cooling oil.

[0059] Preferably, the fifth iron core 8 is composed of multiple stacked silicon steel sheets, each with multiple first oil spray holes and multiple second oil spray holes distributed circumferentially. The first oil spray holes on each silicon steel sheet are interconnected to form an oil spray channel A81; wherein the first oil spray holes on each silicon steel sheet are staggered and interconnected along the radial direction of the silicon steel sheet, so that the formed oil spray channel A81 is inclined towards the center of the fifth iron core 8. The second oil spray holes on each silicon steel sheet are interconnected to form an oil spray channel B82; the second oil spray holes on different silicon steel sheets are staggered and interconnected along the radial direction of the silicon steel sheet, so that the formed oil spray channel B82 is inclined towards the center of the fifth iron core 8. The oil spray channels A81 and B82 are inclined towards the center of the fifth iron core 8, forming a certain spray angle, causing the cooling oil to be sprayed towards the end of the stator winding 3, thereby sufficiently cooling the end of the stator winding 3. Furthermore, the core assembly also includes a sixth core 9, which is connected to the fourth core 7. The sixth core 9 has multiple injection channels C91 and D92 distributed circumferentially. Injection channels C91 are connected to the outlet of the first oil passage, and injection channels D92 are connected to the second oil passage. Specifically, injection channels C91 are connected to a portion of the oil guide groove F71, and injection channels D92, the fourth oil groove 722, and the first oil groove 621 are connected. Specifically, the oil guide groove F71 connected to the third oil groove 721 is not connected to the injection channel C91, and the oil guide groove F71 not connected to the third oil groove 721 is connected to the injection channel C91.

[0060] Specifically, such as Figure 8As shown, the structure of the sixth iron core 9 is the same as that of the fifth iron core 8, that is, the number of slots in the sixth iron core 9 is the same as the number of slots in the fourth iron core 7, and the stator slots 2 of the sixth iron core 9 and the stator slots 2 of the fourth iron core 7 are arranged in a one-to-one correspondence. Multiple fuel injection channels C91 are evenly arranged along the circumference of the sixth iron core 9, and multiple fuel injection channels D92 are evenly arranged along the circumference of the sixth iron core 9. In the radial direction of the sixth iron core 9, the fuel injection channels C91 and D92 are arranged in a one-to-one correspondence. The oil injection channel D92 is configured in a one-to-one correspondence with the fourth oil groove 722, and the oil injection channel D92 is configured in a one-to-one correspondence with the first oil groove 621. The sixth iron core 9 blocks the third oil groove 721, so that the cooling oil in the first oil passage flows sequentially through the oil guide groove D61, the first oil groove 621, the oil guide groove C52, the oil guide groove A41, the oil guide groove C52, and the fourth oil groove 722, and then flows out from the oil injection channel D92 to cool the stator winding 3 at the end. The cooling oil in the first oil passage is sprayed out from the oil injection channel C91. Figure 8 The direction of the middle arrow indicates the flow direction of the cooling oil.

[0061] Preferably, the sixth iron core 9 is composed of multiple stacked silicon steel sheets, each with multiple third and fourth oil spray holes distributed circumferentially. The third oil spray holes on each silicon steel sheet are interconnected to form an oil spray channel C91; wherein the third oil spray holes on each silicon steel sheet are staggered and interconnected along the radial direction of the silicon steel sheet, so that the formed oil spray channel C91 is inclined towards the center of the sixth iron core 9. The fourth oil spray holes on each silicon steel sheet are interconnected to form an oil spray channel D92; the fourth oil spray holes on different silicon steel sheets are staggered and interconnected along the radial direction of the silicon steel sheet, so that the formed oil spray channel D92 is inclined towards the center of the sixth iron core 9. The oil spray channels C91 and D92 are inclined towards the center of the sixth iron core 9, forming a certain spray angle, causing the cooling oil to be sprayed towards the end of the stator winding 3, thereby sufficiently cooling the end of the stator winding 3. According to another specific embodiment of this application, a motor is provided, the motor including a motor stator as described in the above embodiment.

[0062] Specifically, such as Figure 1 As shown, the motor includes: a housing 10, a motor stator and a motor rotor. The motor stator and the motor rotor are both located inside the housing 10. The motor stator is interference-fitted with the inner wall of the housing 10. An oil inlet is formed between the motor stator and the inner wall of the housing 10. Cooling oil flows into the first oil passage and the second oil passage through the oil inlet to cool the stator core and the stator winding 3.

[0063] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0064] The second oil channel is located near the stator slot 2, while the first oil channel is located away from the stator slot 2. The annular groove 1 serves as an oil inlet, communicating with the first and / or second oil channels to provide cooling oil. This allows the cooling oil in the second oil channel to cool the stator core and the windings in the stator slot 2, and the cooling oil in the first oil channel to cool the yoke of the stator core. The oil cooling scheme described above can adequately cool the stator core and the stator windings 3.

[0065] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0066] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor stator, characterized in that, include: A core assembly has an annular groove (1) formed on its outer peripheral surface. The core assembly has a plurality of first oil passages and a plurality of second oil passages distributed circumferentially. The first oil passages and the second oil passages are both arranged to pass through the length direction of the core assembly. At least one of the first oil passages and the second oil passages is connected to the annular groove (1). The first oil passages are located away from the stator slots (2) inside the core assembly, and the second oil passages are located close to the stator slots (2). Stator winding (3), the stator winding (3) is disposed in the stator slot (2), and a portion of the stator winding (3) extends out of the stator slot (2) along the length direction of the core assembly.

2. The motor stator according to claim 1, characterized in that, The first oil passage is connected to the annular groove (1), and the second oil passage is connected to the first oil passage.

3. The motor stator according to claim 2, characterized in that, The middle part of the first oil passage is connected to the annular groove (1).

4. The motor stator according to claim 3, characterized in that, The core assembly includes: The first iron core (4) has a plurality of oil guide grooves A (41) distributed circumferentially, and the oil guide grooves A (41) are arranged to pass through the length direction of the first iron core (4). The second iron core (5) consists of two parts, which are respectively located on both sides of the first iron core (4). The outer diameter of the second iron core (5) is larger than that of the first iron core (4) so ​​that the annular groove (1) is formed between the two second iron cores (5). The second iron core (5) has multiple oil guide grooves B (51) and multiple oil guide grooves C (52) distributed circumferentially. The oil guide grooves B (51) and C (52) are both connected along the length direction of the second iron core (5). The oil guide groove B (51) is connected to the annular groove (1). The first oil passage extends along the length direction of the oil guide groove B (51). The oil guide groove C (52) is connected to the oil guide groove A (41). The second oil passage extends along the length direction of the oil guide groove C (52).

5. The motor stator according to claim 4, characterized in that, The core assembly also includes: The third iron core (6) is connected to one of the second iron cores (5). The third iron core (6) has a plurality of oil guide grooves D (61) and a plurality of oil guide grooves E (62) distributed circumferentially. The oil guide grooves D (61) and E (62) are both connected through the length of the third iron core (6). The oil guide grooves D (61) are connected to the oil guide groove B (51), and the oil guide grooves E (62) are connected to the oil guide groove C (52). The plurality of oil guide grooves E (62) include a first oil groove (621) and a second oil groove (622). The first oil groove (621) is connected to the oil guide groove D (61). The fourth iron core (7) is connected to another second iron core (5). The fourth iron core (7) has multiple oil guide grooves F (71) and multiple oil guide grooves G (72) distributed circumferentially. The oil guide grooves F (71) and G (72) are both connected along the length of the fourth iron core (7). The oil guide groove F (71) is connected to the oil guide groove B (51), and the oil guide groove G (72) is connected to the oil guide groove C (52). The multiple oil guide grooves G (72) include a third oil groove (721) and a fourth oil groove (722). The third oil groove (721) is connected to the oil guide groove F (71). The oil guide groove A (41), the oil guide groove C (52), the oil guide groove E (62) and the oil guide groove G (72) together form the second oil passage, and the oil guide groove B (51), the oil guide groove D (61) and the oil guide groove F (71) together form the first oil passage.

6. The motor stator according to claim 5, characterized in that, The core assembly also includes: The fifth iron core (8) is connected to the third iron core (6). The fifth iron core (8) has multiple oil injection channels A (81) and multiple oil injection channels B (82) distributed circumferentially. The oil injection channel A (81) is connected to the oil outlet of the first oil passage, and the oil injection channel B (82) is connected to the second oil passage.

7. The motor stator according to claim 6, characterized in that, The oil injection channel A (81) is connected to a portion of the oil guide groove D (61), and the oil injection channel B (82), the second oil groove (622), and the third oil groove (721) are connected to each other.

8. The motor stator according to claim 5, characterized in that, The core assembly also includes: The sixth iron core (9) is connected to the fourth iron core (7). The sixth iron core (9) has multiple oil injection channels C (91) and multiple oil injection channels D (92) distributed circumferentially. The oil injection channels C (91) are connected to the oil outlet of the first oil passage, and the oil injection channels D (92) are connected to the second oil passage.

9. The motor stator according to claim 8, characterized in that, The oil injection channel C (91) is connected to a portion of the oil guide groove F (71), and the oil injection channel D (92), the fourth oil groove (722), and the first oil groove (621) are connected.

10. An electric motor, the electric motor comprising a motor stator, characterized in that, The motor stator is the motor stator according to any one of claims 1-9.

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