Motor, electric drive system and vehicle

Abstract

The utility model provides a motor, an electric drive system and a vehicle, the motor comprises a rotating shaft, a stator, a rotor and an insulating layer, the stator comprises a stator iron core and a stator winding, the stator iron core sleeves the rotating shaft, the periphery of the stator iron core is provided with a plurality of winding grooves, the plurality of winding grooves are arranged at intervals along the circumferential direction of the stator iron core, and the stator winding is arranged in the plurality of winding grooves. The insulating layer wraps at least part of the stator from the outer side and can enclose to form the channel, the channel and the stator can be separated through the insulating layer, the influence of a medium in the channel on the stator is reduced, and the risk that the medium in the channel influences normal operation of the motor is reduced. Moreover, at least part of the channel is arranged in the winding groove, on one hand, the heat transfer path between the medium in the channel and the stator can be shortened, and the heat exchange effect is improved, and on the other hand, the channel is formed by using the redundant space in the winding groove, and the influence of the channel formation on the utilization rate of the internal space of the motor can be reduced.

Description

Technical Field

[0001] This application relates to the field of electric drive technology, and in particular to an electric motor, an electric drive system, and a vehicle. Background Technology

[0002] An electric motor is a power device used to convert electrical energy into mechanical energy. To prevent the motor from overheating and being damaged, the stator usually needs to be cooled. However, the cooling structures currently installed in motors have low cooling efficiency and significantly impact the utilization of the internal space of the motor. Utility Model Content

[0003] In view of the above problems, this application provides an electric motor, an electric drive system, and a vehicle that can improve the cooling effect on the stator while reducing the impact on the utilization rate of the internal space of the motor.

[0004] In a first aspect, embodiments of this application provide an electric motor, including a shaft, a stator, a rotor, and an insulating layer. The stator includes a stator core and stator windings. The stator core is sleeved on the shaft, and a plurality of winding slots are provided on the outer periphery of the stator core. The plurality of winding slots are arranged at intervals along the circumference of the stator core, and the stator windings are disposed in the plurality of winding slots. The rotor is disposed on the outer periphery of the stator and connected to the shaft. The insulating layer covers at least a portion of the stator from the outside, and the insulating layer encloses to form a channel. At least a portion of the channel is disposed in the winding slot, and the insulating layer separates the channel from the stator.

[0005] In the above scheme, the stator core is sleeved on the rotating shaft, and multiple winding slots are arranged around its outer circumference. These slots are spaced apart circumferentially along the stator core. The stator windings are disposed within these slots. An insulating layer covers at least a portion of the stator from the outside, forming a channel. The insulating layer separates the channel from the stator, reducing the impact of the medium within the channel on the stator and lowering the risk of the medium affecting the normal operation of the motor. Furthermore, the fact that at least a portion of the channel is located within the winding slots shortens the heat transfer path between the medium within the channel and the stator, improving heat exchange efficiency. Additionally, utilizing the extra space within the winding slots to form the channel reduces the impact of the channel's formation on the utilization rate of the motor's internal space.

[0006] In some embodiments, there are multiple channels, and each channel is configured to correspond one-to-one with a multiple winding slot.

[0007] In the above scheme, by setting multiple channels, so that multiple channels correspond one-to-one with multiple winding slots, the heat exchange effect between the medium in the channels and the stator can be further improved.

[0008] In some embodiments, the projection of the channel onto the stator core in the circumferential direction lies within the winding slot.

[0009] In the above scheme, the projection of the channel along the circumference on the stator core is located within the winding slot, that is, the entire channel is located within the winding slot. It does not need to occupy additional space outside the winding slot, which can further reduce the impact of the channel setting on the utilization rate of the internal space of the motor.

[0010] In some embodiments, the motor further includes a first seal disposed on one side of the stator along the axial direction of the shaft, the first seal being sealed to the insulating layer for sealing the channel.

[0011] In the above solution, by setting a first seal on one side of the stator along the axial direction of the shaft, and sealing the channel by sealing the opening of the channel with the first seal and the insulation layer, the risk of leakage of the medium in the channel from the end of the stator can be reduced and the reliability of motor operation can be improved.

[0012] In some embodiments, the number of channels is multiple, including a first channel and a second channel that are interconnected. The first seal is provided with a medium inlet and a medium outlet, the medium inlet is connected to the first channel, and the medium outlet is connected to the second channel.

[0013] In the above scheme, by setting a medium inlet and a medium outlet in the first sealing element, the medium inlet is connected to the first channel and the medium outlet is connected to the second channel. Therefore, the medium can flow into the first channel from the medium inlet and flow from the first channel to the second channel. Finally, after flowing through the second channel, it flows out through the medium outlet. During the flow of the medium, the medium can exchange heat with the stator and carry the heat generated by the stator out of the motor, thereby improving the cooling effect of the stator.

[0014] In some embodiments, the first seal and the insulating layer enclose each other to form a first merging channel and a second merging channel, wherein the medium inlet is connected to at least two first channels through the first merging channel, and the medium outlet is connected to at least two second channels through the second merging channel.

[0015] In the above scheme, the medium inlet and at least two first channels are connected through the first merging channel, and the medium outlet and at least two second channels are connected through the second merging channel. This can reduce the number of medium inlets and outlets formed on the first seal to a certain extent and reduce the difficulty of manufacturing the first seal.

[0016] In some embodiments, the motor further includes a stator sleeve fitted onto the rotating shaft, a stator core fitted onto the stator sleeve, and a first seal connected to one end of the stator sleeve along the axial direction.

[0017] In the above scheme, by setting the first sealing element to be connected to one end of the stator sleeve along the axial direction, the stability of the first sealing element can be improved, thereby improving the sealing reliability of the first sealing element to the channel.

[0018] In some embodiments, the first seal and the stator sleeve are connected as a single unit.

[0019] In the above scheme, by setting the first sealing element and the stator sleeve to be connected as a single structure, the sealing reliability of the first sealing element to the channel can be further improved.

[0020] In some embodiments, the motor further includes a second seal disposed on the side of the stator axially away from the first seal, the second seal being sealed to the insulating layer for sealing the channel.

[0021] In the above solution, by setting a second seal at the end of the stator away from the first seal along the axial direction, and sealing the opening at the end of the channel away from the first seal along the axial direction, the risk of medium leakage from the end of the stator in the channel can be reduced, and the reliability of motor operation can be improved.

[0022] In some embodiments, the second seal and the insulating layer enclose a third confluence channel, and the first channel and the second channel are connected through the third confluence channel.

[0023] In the above scheme, a third confluence channel is formed by the second sealing element and the insulating layer to connect the first channel and the second channel. Compared with the confluence channel formed by the insulating layer itself, the manufacturing difficulty of the insulating layer can be reduced.

[0024] In some embodiments, the insulating layer includes a first insulating portion, a second insulating portion, a third insulating portion, and a fourth insulating portion, wherein the first insulating portion and the second insulating portion are arranged at intervals in the circumferential direction, the surfaces of the first insulating portion and the second insulating portion facing away from each other respectively cover a portion of the stator winding, the third insulating portion and the fourth insulating portion are arranged at intervals in the radial direction along the axis of rotation, the third insulating portion is connected to the first insulating portion and the second insulating portion respectively, and the fourth insulating portion is connected to the first insulating portion and the second insulating portion respectively, so as to enclose and form a channel.

[0025] In the above scheme, the first insulating part and the second insulating part are arranged at intervals in the circumferential direction, and the surfaces of the first insulating part and the second insulating part that are opposite to each other respectively cover a part of the stator winding. Furthermore, the third insulating part and the fourth insulating part are arranged at intervals in the radial direction along the shaft. The third insulating part is connected to the first insulating part and the second insulating part respectively, and the fourth insulating part is connected to the first insulating part and the second insulating part respectively. Thus, the first insulating part, the second insulating part, the third insulating part and the fourth insulating part together form a channel for containing the medium, which can reduce the risk of medium leakage in the channel affecting the stator winding and the stator core.

[0026] Secondly, embodiments of this application provide an electric drive system including any of the motors described above.

[0027] Thirdly, embodiments of this application also provide a vehicle, including a battery device and the aforementioned electric drive system, wherein the motor of the electric drive system is connected to the battery device.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application 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 application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a top view of an electric motor provided in some embodiments of this application;

[0031] Figure 2 yes Figure 1 Schematic diagram of the cross section at point AA;

[0032] Figure 3 This is a top view of the stator in an electric motor provided in some embodiments of this application;

[0033] Figure 4 This is an assembly diagram of the stator and the first seal in an electric motor provided in some embodiments of this application;

[0034] Figure 5 for Figure 4 Schematic diagram of the BB cross section in the middle;

[0035] Figure 6 These are isometric views of the stator in an electric motor provided in some embodiments of this application;

[0036] Figure 7 for Figure 3 A magnified view of the area at CC.

[0037] Tag name:

[0038] Motor 100; Shaft 110; Stator 120; Stator core 121; Main body 1211; Support 1212; Stator winding 122; Winding slot 123; Rotor 130; Insulation layer 140; First insulation part 141; Second insulation part 142; Third insulation part 143; Fourth insulation part 144; First seal 150; Medium inlet 151; Medium outlet 152; Stator sleeve 160; Second seal 170; Channel K1; First channel K11; Second channel K12; First confluence channel K2; Second confluence channel K3; Third confluence channel K4. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0044] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0045] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0048] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] As the core driving component of an electric drive system, the motor continuously generates heat in its stator and rotor during operation. When this heat accumulates and the temperature reaches a threshold, the high-temperature environment inside the motor may affect the insulation of the stator windings or cause demagnetization of the internal permanent magnets, affecting the normal operation of the motor and even leading to safety accidents. Therefore, to improve the reliability of the motor, a cooling structure is usually installed inside the motor for cooling. However, current cooling structures occupy internal space, such as the space used to house the stator windings, significantly impacting the utilization of internal space. Furthermore, due to the long heat transfer path between the cooling structure and the stator, its cooling effect on the stator is quite limited.

[0051] In view of this, this application provides an electric motor, including a shaft, a stator, a rotor, and an insulating layer. The stator includes a stator core and stator windings. The stator core is sleeved on the shaft, and multiple winding slots are provided on the outer periphery of the stator core. The multiple winding slots are arranged at intervals along the circumference of the stator core, and the stator windings are disposed in the multiple winding slots. The rotor is disposed on the outer periphery of the stator and connected to the shaft. The insulating layer covers at least a portion of the stator from the outside, and the insulating layer encloses and forms a channel, such that at least a portion of the channel is disposed in the winding slot. On the one hand, this can shorten the heat transfer path between the medium in the channel and the stator, improving the heat exchange effect. On the other hand, by utilizing the extra space in the winding slot to form the channel, the impact of the channel formation on the internal space utilization of the motor can be reduced. In addition, by separating the channel from the stator by the insulating layer, the influence of the medium in the channel on the stator can be reduced, lowering the risk that the medium in the channel will affect the normal operation of the motor.

[0052] The structure of the motor will be described in detail below with reference to the accompanying drawings.

[0053] Please see Figures 1 to 3 This application provides an electric motor 100, including a rotating shaft 110, a stator 120, a rotor 130, and an insulating layer 140. The stator 120 includes a stator core 121 and a stator winding 122. The stator core 121 is sleeved on the rotating shaft 110. A plurality of winding slots 123 are provided on the outer periphery of the stator core 121. The plurality of winding slots 123 are arranged at intervals along the circumference of the stator core 121. The stator winding 122 is disposed in the plurality of winding slots 123. The rotor 130 is disposed on the outer periphery of the stator 120 and connected to the rotating shaft 110. The insulating layer 140 covers at least a portion of the stator 120 from the outside. The insulating layer 140 encloses a channel K1. At least a portion of the channel K1 is disposed in the winding slots 123. The insulating layer 140 separates the channel K1 from the stator 120.

[0054] The rotor 130 is the component in the motor 100 that rotates relative to the stator 120. The rotor 130 is fitted onto the outer periphery of the stator 120 and connected to the shaft 110. When the stator winding 122 is energized and generates a rotating magnetic field, the rotor 130 rotates under the influence of this magnetic field, thereby driving the shaft 110 to rotate. This allows the shaft 110 to output torque, thus driving an external mechanism to rotate. The rotor 130 can be connected to the shaft 110 in various ways; for example, the rotor 130 can be connected to the shaft 110 via a flange.

[0055] The stator 120 is a stationary component in the motor 100. The stator 120 includes a stator core 121 and a stator winding 122. The stator core 121 is used to support the stator winding 122 and conduct the magnetic field and reduce energy loss when a magnetic field is generated around the stator winding 122. The stator core 121 is sleeved on the rotating shaft 110, and multiple winding slots 123 can be opened on its outer peripheral side away from the rotating shaft 110. The multiple winding slots 123 are arranged at intervals along the circumference of the stator core 121. At this time, the stator core 121 is equivalent to including a main body 1211 and multiple support parts 1212. The main body 1211 is sleeved on the rotating shaft 110, and the multiple support parts 1212 are arranged at intervals along the circumference of the main body 1211 to form a winding slot 123 between two adjacent support parts 1212 for accommodating the stator winding 122. It should be noted that there are multiple ways to connect the stator core 121 to the rotating shaft 110. For example, the stator core 121 can be connected to the rotating shaft 110 via bearings. When the rotating shaft 110 rotates, the rollers of the bearings roll relative to the rotating shaft 110, and the stator core 121 can remain stationary. The stator winding 122 is used to generate a magnetic field to drive the rotor 130 to rotate. The stator winding 122 is disposed in multiple winding slots 123 of the stator core 121 and can be wound on multiple support portions 1212 of the stator core 121. When the stator winding 122 is energized, a rotating magnetic field can be generated around it to drive the rotor 130 to rotate.

[0056] The insulating layer 140 is a component used to enclose and separate the channel K1 from the stator 120, thereby insulating the medium within the channel K1 from the stator 120. The insulating layer 140 may cover at least a portion of the stator 120 from the outside, specifically the outer side of the stator 120, which may be the portion of the stator 120 exposed relative to the shaft 110, for example, including the outer peripheral side of the stator 120 away from the shaft 110 and both circumferential ends of the stator 120. The insulating layer 140 may cover the entire stator 120 from the outside, or it may cover a portion of the stator 120, for example, a portion of the stator core 121 and a portion of the stator winding 122.

[0057] An internal channel K1 is formed within the insulating layer 140. Channel K1 is a structure designed to contain the medium, facilitating heat exchange between the medium and the stator core 121 and stator winding 122. The channel K1 can be a relatively closed cavity structure, or it can be open at one or both ends. It is understood that the insulating layer 140 encloses the channel K1, thus separating the medium within the channel K1 from the stator 120, thereby reducing the impact of the medium within the channel K1 on the stator 120 and lowering the risk of the medium within the channel K1 affecting the normal operation of the motor 100.

[0058] It is understood that a gap is usually formed between the stator windings 122 wound on two adjacent support portions 1212, and this gap is located in the corresponding winding slot 123. The insulating layer 140 can fill the aforementioned gap to cover the stator core 121 and the stator windings 122 in the winding slot 123. At this time, the insulating layer 140 can enclose at least a portion of the channel K1 in the aforementioned gap, that is, at least a portion of the channel K1 is located in the winding slot 123. On the one hand, it can shorten the heat transfer path between the medium in the channel K1 and the stator 120 and improve the heat exchange effect. On the other hand, by using the extra space in the winding slot 123 to form at least a portion of the channel K1, the formation of the channel K1 can reduce the impact of the formation of the channel K1 on the internal space utilization of the motor 100.

[0059] It should be noted that "at least part of channel K1 is located in winding groove 123" can mean that all channels K1 are located in winding groove 123, or it can mean that part of channel K1 is located in winding groove 123 and the other part is located outside winding groove 123.

[0060] It should be noted that in the embodiments of this application, "circumferential" can refer to the circumferential direction of the sub-core 121 or the circumferential direction of the rotating shaft 110. Similarly, "radial" and "axial" can refer to the radial and axial directions of the sub-core 121 or the radial and axial directions of the rotating shaft 110, respectively.

[0061] Optionally, the insulating layer 140 can be made by potting or injection molding. During the preparation of the insulating layer 140, a mold can be set at the position corresponding to the channel K1. After the material of the insulating layer 140 is cured, it can be demolded to form the channel K1.

[0062] Please continue reading. Figure 3 In some embodiments, there are multiple channels K1, and multiple channels K1 are configured in a one-to-one correspondence with multiple winding slots 123.

[0063] Multiple channels K1 are set one-to-one with multiple winding slots 123. At this time, the insulation layer 140 can cover part of the stator core 121 and part of the stator winding 122 corresponding to each winding slot 123.

[0064] In the above scheme, by setting the number of channels K1 to be multiple, so that multiple channels K1 are set one-to-one with multiple winding slots 123, the heat exchange effect between the medium in the channel K1 and the stator 120 can be further improved.

[0065] In some embodiments, in the circumferential direction, the projection of channel K1 onto stator core 121 is located within winding slot 123.

[0066] In the above scheme, the projection of channel K1 on the stator core 121 along the circumference is located in the winding slot 123, that is, the entire channel K1 is located in the winding slot 123. It does not need to occupy additional space outside the winding slot 123, which can further reduce the impact of the setting of channel K1 on the internal space utilization of motor 100.

[0067] Please see Figure 4 and Figure 5 In some embodiments, the motor 100 further includes a first seal 150, which is disposed on one side of the stator 120 along the axial direction of the shaft 110. The first seal 150 is sealed to the insulating layer 140 to seal the channel K1.

[0068] The channel K1 may have an opening on one side along the axial direction for the medium to enter or exit the channel K1. A first seal 150 is a component used to seal at least a portion of the opening in the channel K1. The first seal 150 is disposed on one side of the stator 120 along the axial direction. A portion of the first seal 150 may be spaced apart from the stator 120 along the axial direction. A portion of the insulating layer 140 may be provided between the first seal 150 and the stator 120. The first seal 150 is sealed to this portion of the insulating layer 140, thereby sealing the opening on one side of the channel K1. In this case, in a plane perpendicular to the axial direction, the axial projection of the opening of the channel K1 lies within the axial projection of the first seal 150. The shape of the first seal 150 can be varied. For example, the shape of the first seal 150 can be adapted to the opening of the channel K1 and slightly larger than the opening of the channel K1. Alternatively, the first seal 150 can be approximately disc-shaped. In a plane perpendicular to the axial direction, the axial projections of the stator 120 and the insulating layer 140 are both located within the axial projection of the first seal 150. There are various ways to seal the first seal 150 and the insulating layer 140. For example, the first seal 150 and the insulating layer 140 can be sealed together using sealant.

[0069] In the above scheme, by providing a first seal 150 on one side of the stator 120 along the axial direction of the shaft 110, and sealing the first seal 150 with the insulating layer 140 to block the opening of the channel K1 and seal the channel K1, the risk of the medium in the channel K1 leaking from the end of the stator 120 can be reduced, and the reliability of the motor 100 operation can be improved.

[0070] Please see Figure 5 and Figure 6 In some embodiments, there are multiple channels K1, including a first channel K11 and a second channel K12 that are interconnected. The first seal 150 is provided with a medium inlet 151 and a medium outlet 152. The medium inlet 151 is connected to the first channel K11, and the medium outlet 152 is connected to the second channel K12.

[0071] There are multiple channels K1, and their actual number can be flexibly set according to the actual situation. The multiple channels K1 include a first channel K11 and a second channel K12. The number of first channels K11 can be one or more, and the number of second channels K12 can also be one or more. The number of first channels K11 and second channels K12 can be the same or different. For example, when there is one first channel K11, the number of second channels K12 can be one or more.

[0072] The first channel K11 and the second channel K12 are interconnected, allowing the medium to flow between them. Specifically, the medium can flow from the first channel K11 into the second channel K12, or vice versa. There are several ways to connect the first channel K11 and the second channel K12. For example, a second seal 170 can be provided on the side of the stator 120 axially away from the first seal 150, defining a confluence channel that connects the first channel K11 and the second channel K12. Alternatively, the insulating layer 140 itself can enclose and form a confluence channel, connecting the first channel K11 and the second channel K12. It should be noted that the first channel K11 and the second channel K12 are connected. This can be one first channel K11 connected to one second channel K12, one first channel K11 connected to multiple second channels K12 at the same time, multiple first channels K11 connected to one second channel K12 at the same time, or multiple first channels K11 connected to multiple second channels K12 at the same time.

[0073] The first sealing element 150 is provided with a medium inlet 151 and a medium outlet 152, which are spaced apart. The medium inlet 151 is connected to the first channel K11, and the medium outlet 152 is connected to the second channel K12. Therefore, the medium can flow into the first channel K11 from the medium inlet 151 and flow from the first channel K11 to the second channel K12. Finally, after flowing through the second channel K12, it flows out through the medium outlet 152. During the flow of the medium, the medium can exchange heat with the stator 120 and carry the heat generated by the stator 120 out of the motor 100, thereby improving the cooling effect of the stator 120.

[0074] The number of medium inlets 151 can be one or more, and the number of medium outlets 152 can also be one or more. Each medium inlet 151 can be connected to a first channel K11 in a one-to-one correspondence, or one medium inlet 151 can be connected to multiple first channels K11. Similarly, each medium outlet 152 can be connected to a second channel K12 in a one-to-one correspondence, or one medium outlet 152 can be connected to multiple second channels K12.

[0075] Please continue reading. Figure 5 and Figure 6 In some embodiments, the first seal 150 and the insulating layer 140 enclose each other to form a first merging channel K2 and a second merging channel K3, wherein the medium inlet 151 is connected to at least two first channels K11 through the first merging channel K2, and the medium outlet 152 is connected to at least two second channels K12 through the second merging channel K3.

[0076] The first confluence channel K2 is used to connect the medium inlet 151 and at least two first channels K11. The first confluence channel K2 is formed by the first seal 150 and the insulating layer 140 located between the stator 120 and the first seal 150. It is located axially between the medium inlet 151 and the first channels K11. One end of the first confluence channel K2 is connected to the medium inlet 151 along the axial direction, and the other end is connected to at least two first channels K11. At this time, in a plane perpendicular to the axial direction, the axial projection of the at least two first channels K11 is located within the axial projection of the first confluence channel K2.

[0077] The number of first merging channels K2 can be one or more. When there is only one first merging channel K2, it can simultaneously connect to all first channels K11. When there are multiple first merging channels K2, they are spaced apart and not interconnected, and each first merging channel K2 can be connected to a different first channel K11. The number of medium inlets 151 can correspond to the number of first merging channels K2, and each medium inlet 151 is connected to a first merging channel K2 in a one-to-one manner. Therefore, by reasonably setting the number of first merging channels K2, the number of medium inlets 151 can be adjusted accordingly.

[0078] The second confluence channel K3 is used to connect the medium outlet 152 and at least two second channels K12. The second confluence channel K3 is formed by the first seal 150 and the insulating layer 140 located between the stator 120 and the first seal 150. It is located axially between the medium outlet 152 and the second channel K12. One end of the second confluence channel K3 is connected to the medium outlet 152 along the axial direction, and the other end is connected to at least two second channels K12. At this time, in a plane perpendicular to the axial direction, the axial projection of the at least two second channels K12 is located within the axial projection of the second confluence channel K3.

[0079] The number of second merging channels K3 can be one or more. When there is only one second merging channel K3, it can simultaneously connect to all second channels K12. When there are multiple second merging channels K3, they are spaced apart and not interconnected, and each second merging channel K3 can be connected to a different second channel K12. The number of medium outlets 152 can correspond to the number of second merging channels K3, and each medium outlet 152 is connected to a second merging channel K3 in a one-to-one manner. Therefore, by reasonably setting the number of second merging channels K3, the number of medium outlets 152 can be adjusted accordingly.

[0080] It should be noted that the number of the first merging channel K2 and the number of the second merging channel K3 can be the same or different, that is, the number of medium inlets 151 and the number of medium outlets 152 can be the same or different.

[0081] The first confluence channel K2 and the second confluence channel K3 are arranged alternately. Therefore, the medium flowing into the first confluence channel K2 from the medium inlet 151 cannot flow directly from the first confluence channel K2 to the second confluence channel K3. Instead, it needs to flow through the first channel K11 and the second channel K12 before entering the second confluence channel K3, which can improve the heat exchange effect between the medium and the stator 120.

[0082] In the above scheme, the medium inlet 151 and at least two first channels K11 are connected through the first confluence channel K2, and the medium outlet 152 and at least two second channels K12 are connected through the second confluence channel K3. This can reduce the number of medium inlets 151 and medium outlets 152 formed on the first seal 150 to a certain extent, and reduce the difficulty of manufacturing the first seal 150.

[0083] Please continue reading. Figure 5 In some embodiments, the motor 100 further includes a stator sleeve 160 sleeved on the rotating shaft 110, a stator core 121 sleeved on the stator sleeve 160, and a first seal 150 connected to one end of the stator sleeve 160 along the axial direction.

[0084] The stator sleeve 160 is a component used to mount the stator core 121 onto the rotating shaft 110. The stator sleeve 160 is mounted around the rotating shaft 110 circumferentially, and the stator core 121 is mounted on the stator sleeve 160. The stator core 121 can be mounted around the stator sleeve 160 circumferentially. During the rotation of the rotating shaft 110, both the stator sleeve 160 and the stator 120 remain stationary. There are various ways to connect the stator sleeve 160 to the rotating shaft 110. For example, the stator sleeve 160 can be mounted on the rotating shaft 110 via bearings. During the rotation of the rotating shaft 110, the rollers of the bearings roll relative to the rotating shaft 110, keeping the stator sleeve 160 and the stator 120 stationary.

[0085] In the above scheme, by setting the first sealing element 150 to be connected to one end of the stator sleeve 160 along the axial direction, the stability of the first sealing element 150 can be improved, thereby improving the sealing reliability of the first sealing element 150 to the channel K1.

[0086] In some embodiments, the first seal 150 and the stator sleeve 160 are connected as an integral structure.

[0087] The first sealing element 150 and the stator sleeve 160 can be an integral structure manufactured together using the same process, or the first sealing element 150 can be fixedly connected to the stator sleeve 160 as an integral structure through welding or other processes.

[0088] In the above scheme, by setting the first sealing element 150 and the stator sleeve 160 to be connected as a single structure, the sealing reliability of the first sealing element 150 to the channel K1 can be further improved.

[0089] Please continue reading. Figure 5 In some embodiments, the motor 100 further includes a second seal 170, which is disposed on the side of the stator 120 away from the first seal 150 along the axial direction. The second seal 170 is sealed to the insulating layer 140 to seal the channel K1.

[0090] The channel K1 can have openings at both ends along the axial direction, and one end of the opening can be sealed by the first sealing member 150. The second sealing member 170 is a component used to seal the end opening of the channel K1 away from the first sealing member 150 along the axial direction. The second sealing member 170 is disposed on the side of the stator 120 away from the first sealing member 150 along the axial direction. In the axial direction, the second sealing member 170 can be arranged at intervals from the stator 120. A portion of the insulating layer 140 can be provided between the second sealing member 170 and the stator 120. The second sealing member 170 is sealed to this portion of the insulating layer 140, thereby sealing the opening of the channel K1. At this time, in a plane perpendicular to the axial direction, the projection of the opening of the channel K1 along the axial direction is located within the projection of the second sealing member 170 along the axial direction. The shape of the second seal 170 can be varied. For example, the shape of the second seal 170 can be adapted to the opening of the channel K1 and slightly larger than the opening of the channel K1. Alternatively, the second seal 170 can be approximately disc-shaped. In a plane perpendicular to the axial direction, the axial projections of the stator 120 and the insulating layer 140 are both located within the axial projection of the second seal 170. There are various ways to seal the second seal 170 and the insulating layer 140. For example, the second seal 170 and the insulating layer 140 can be sealed together using sealant.

[0091] In the above solution, by providing a second seal 170 at one end of the stator 120 away from the first seal 150 along the axial direction, and sealing the opening of the channel K1 away from the first seal 150 through the second seal 170 and sealing the insulation layer 140, the risk of leakage of the medium in the channel K1 from the end of the stator 120 can be reduced, thereby improving the reliability of the motor 100 operation.

[0092] In some embodiments, the second seal 170 and the insulating layer 140 enclose a third confluence channel K4, and the first channel K11 and the second channel K12 are connected through the third confluence channel K4.

[0093] The third merging channel K4 connects the first channel K11 and the second channel K12. The third merging channel K4 is formed by the second seal 170 and the insulating layer 140, and can be located at the axial end of the first channel K11 and the second channel K12 away from the first seal 150. In a plane perpendicular to the axial direction, the axial projections of the first channel K11 and the second channel K12 lie within the axial projection of the third merging channel K4. There can be one or more third merging channels K4. When there is only one third merging channel K4, it simultaneously connects all the first channels K11 and the second channels K12. When there are multiple third merging channels K4, each of the multiple third merging channels K4 connects multiple first channels K11 and multiple second channels K12 respectively.

[0094] In the above scheme, the third confluence channel K4 is formed by the second sealing element 170 and the insulating layer 140, which is used to connect the first channel K11 and the second channel K12. Compared with the confluence channel formed by the insulating layer 140 itself, the manufacturing difficulty of the insulating layer 140 can be reduced.

[0095] Please see Figure 7 In some embodiments, the insulating layer 140 includes a first insulating portion 141, a second insulating portion 142, a third insulating portion 143, and a fourth insulating portion 144. In the circumferential direction, the first insulating portion 141 and the second insulating portion 142 are arranged at intervals. The surfaces of the first insulating portion 141 and the second insulating portion 142 that are opposite to each other respectively cover a portion of the stator winding 122. The third insulating portion 143 and the fourth insulating portion 144 are arranged at intervals along the radial direction of the shaft 110. The third insulating portion 143 is connected to the first insulating portion 141 and the second insulating portion 142 respectively, and the fourth insulating portion 144 is connected to the first insulating portion 141 and the second insulating portion 142 respectively, so as to enclose and form a channel K1.

[0096] The first insulating portion 141 and the second insulating portion 142 are located within the winding slot 123, arranged circumferentially at intervals. Circumferentially, the channel K1 is located between the first insulating portion 141 and the second insulating portion 142. Furthermore, circumferentially, the surface of the first insulating portion 141 facing away from the second insulating portion 142 is the same as the surface of the first insulating portion 141 facing away from the channel K1. This surface covers a portion of the stator winding 122; that is, the first insulating portion 141 is located between this portion of the stator winding 122 and the channel K1, thus separating this portion of the stator winding 122 from the channel K1. Similarly, circumferentially, the surface of the second insulating portion 142 facing away from the first insulating portion 141 is the same as the surface of the second insulating portion 142 facing away from the channel K1. This surface covers a portion of the stator winding 122; that is, the second insulating portion 142 is located between this portion of the stator winding 122 and the channel K1, thus separating this portion of the stator winding 122 from the channel K1.

[0097] The third insulating portion 143 and the fourth insulating portion 144 are arranged radially at intervals, and in the radial direction, the channel K1 is located between the third insulating portion 143 and the fourth insulating portion 144. The third insulating portion 143 is connected to the first insulating portion 141 and the second insulating portion 142 respectively, and the fourth insulating portion 144 is connected to the first insulating portion 141 and the second insulating portion 142 respectively. At this time, the first insulating portion 141, the third insulating portion 143, the second insulating portion 142, and the fourth insulating portion 144 are connected in sequence to form the channel K1. It should be noted that both the third insulating portion 143 and the fourth insulating portion 144 can be located inside the winding groove 123, or a portion of the third insulating portion 143 and the fourth insulating portion 144 that is away from the rotating shaft 110 can also be located outside the winding groove 123.

[0098] Optionally, in the radial direction, the third insulating portion 143 can be close to the rotating shaft 110, and the fourth insulating portion 144 can be far away from the rotating shaft 110. In this case, the surface of the third insulating portion 143 facing away from the channel K1 can cover a portion of the bottom wall of the corresponding winding slot 123, or it can extend to cover the entire bottom wall of the corresponding winding slot 123, that is, cover a portion of the stator core 121, thereby reducing the influence of the medium in the channel K1 on the stator core 121. Furthermore, when the third insulating portion 143 covers the entire bottom wall of the corresponding winding slot 123, a portion of the third insulating portion 143 can be located radially between the stator winding 122 and the main body 1211 of the stator core 121.

[0099] Optionally, the fourth insulating portion 144 can be arranged circumferentially around the stator 120. In this case, the fourth insulating portion 144 can not only cover the surface of the stator winding 122 away from the shaft 110, but also cover the surface of the support portion 1212 of the stator core 121 away from the shaft 110, to further reduce the risk of the medium in the channel K1 affecting the normal operation of the stator winding 122 and the stator core 121. In this case, part of the fourth insulating portion 144 is located inside the winding slot 123, while the remaining part of the fourth insulating portion 144 is located outside the winding slot 123.

[0100] Alternatively, the fourth insulating portion 144 can extend circumferentially to the side of the stator winding 122 away from the shaft 110 to cover a portion of the surface of the stator winding 122 away from the shaft 110, reducing the risk of the medium in the channel K1 affecting the normal operation of the stator winding 122. In this case, the fourth insulating portion 144 is located in the winding slot 123, and it is separated from the surface of the support portion 1212 of the stator core 121 away from the shaft 110, thereby reducing the influence of the insulating layer 140 on the circumferential dimension of the stator 120 and reducing the risk of an increase in the air gap between the stator 120 and the rotor 130.

[0101] In the above scheme, the first insulating part 141 and the second insulating part 142 are arranged at intervals in the circumferential direction, and the surfaces of the first insulating part 141 and the second insulating part 142 that are opposite to each other respectively cover a part of the stator winding 122. Furthermore, the third insulating part 143 and the fourth insulating part 144 are arranged at intervals in the radial direction along the shaft 110. The third insulating part 143 is connected to the first insulating part 141 and the second insulating part 142 respectively, and the fourth insulating part 144 is connected to the first insulating part 141 and the second insulating part 142 respectively. Thus, the first insulating part 141, the second insulating part 142, the third insulating part 143 and the fourth insulating part 144 together enclose and form a channel K1 for containing the medium, which can reduce the risk of medium leakage in the channel K1 affecting the stator winding 122 and the stator core 121.

[0102] Secondly, embodiments of this application provide an electric drive system including a motor 100 as described above.

[0103] The electric drive system provided in this application has the technical effects of the motor 100 in any of the above embodiments. The explanations of the same or corresponding structures and terms as in the above embodiments will not be repeated here.

[0104] In this embodiment, the motor 100, as the core driving component of the electric drive system, can be applied to various electrical devices that use electric drive systems, such as electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0105] Thirdly, embodiments of this application also provide a vehicle, including a battery device and the aforementioned electric drive system, wherein the motor 100 of the electric drive system is connected to the battery device. The vehicle provided by embodiments of this application possesses the technical effects of the electric drive system in any of the above embodiments. Explanations of structures and terms identical or corresponding to those in the above embodiments will not be repeated here.

[0106] According to some embodiments of this application, the motor 100 includes a shaft 110, a stator 120, a rotor 130, and an insulating layer 140. The stator 120 includes a stator core 121 and a stator winding 122. The stator core 121 is sleeved on the shaft 110. Multiple winding slots 123 are provided on the outer periphery of the stator core 121, and these slots are spaced apart circumferentially along the stator core 121. The stator winding 122 is disposed in the multiple winding slots 123. The rotor 130 is disposed on the outer periphery of the stator 120 and connected to the shaft 110. The insulating layer 140 covers at least a portion of the stator 120 from the outside, forming a channel K1. At least a portion of the channel K1 is disposed in the winding slots 123, and the insulating layer 140 separates the channel K1 from the stator 120. There are multiple channels K1, and each channel K1 corresponds to one of the multiple winding slots 123. In the circumferential direction, the projection of channel K1 on the stator core 121 is located within the winding slot 123. The motor 100 also includes a first seal 150, which is disposed on one side of the stator 120 along the axial direction of the shaft 110. The first seal 150 is sealed to the insulating layer 140 to seal channel K1. There are multiple channels K1, including interconnected first channels K11 and second channels K12. The first seal 150 has a medium inlet 151 and a medium outlet 152. The medium inlet 151 communicates with the first channel K11, and the medium outlet 152 communicates with the second channel K12. The first seal 150 and the insulating layer 140 enclose and form mutually spaced first merging channels K2 and second merging channels K3. The medium inlet 151 is connected to at least two first channels K11 via the first merging channel K2, and the medium outlet 152 is connected to at least two second channels K12 via the second merging channel K3. The motor 100 also includes a second seal 170, which is disposed on the side of the stator 120 away from the first seal 150 along the axial direction. The second seal 170 is sealed to the insulating layer 140 to seal the channel K1. The second seal 170 and the insulating layer 140 enclose a third confluence channel K4, through which the first channel K11 and the second channel K12 are connected.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electric machine characterized in that, The motor comprises: a rotating shaft; a stator comprising a stator core and a stator winding, the stator core being sleeved on the rotating shaft, the stator core being provided with a plurality of winding slots on the outer periphery thereof, the plurality of winding slots being arranged at intervals along the circumferential direction of the stator core, the stator winding being arranged in the plurality of winding slots; a rotor arranged on the outer periphery of the stator and connected to the rotating shaft; an insulation layer covering at least part of the stator from the outside, the insulation layer enclosing a channel, at least part of the channel being arranged in the winding slot, the insulation layer separating the channel from the stator.

2. The electric machine of claim 1, wherein, The number of channels is plural, and the plurality of channels are arranged one-to-one corresponding to the plurality of winding slots.

3. The electric machine of claim 1, wherein, In the circumferential direction, the projection of the channel on the stator core is located in the winding slot.

4. The electric machine of claim 1, wherein, The motor further comprises a first sealing member arranged on one side of the stator along the axial direction of the rotating shaft, the first sealing member being sealingly connected to the insulation layer and used for sealing the channel.

5. The electric machine of claim 4, wherein, The number of channels is plural, and the plurality of channels comprise a first channel and a second channel that are in communication with each other, The first sealing member is provided with a medium inlet and a medium outlet, the medium inlet being in communication with the first channel, and the medium outlet being in communication with the second channel.

6. The electric machine of claim 5, wherein, The first sealing member and the insulation layer enclose a first combined flow channel and a second combined flow channel that are spaced apart from each other, The medium inlet is connected to at least two first channels through the first combined flow channel, and the medium outlet is connected to at least two second channels through the second combined flow channel.

7. The electric machine of claim 4, wherein, The motor further comprises a stator sleeve sleeved on the rotating shaft, the stator core being sleeved on the stator sleeve, and the first sealing member being connected to one end of the stator sleeve along the axial direction.

8. The electric machine of claim 7, wherein, The first sealing member is connected to the stator sleeve in an integrated structure.

9. The electric machine of claim 5, wherein, The motor further comprises a second sealing member arranged on one side of the stator away from the first sealing member along the axial direction, the second sealing member being sealingly connected to the insulation layer and used for sealing the channel.

10. The electric machine of claim 9, wherein, The second sealing member and the insulation layer enclose a third combined flow channel, and the first channel and the second channel are connected through the third combined flow channel.

11. The electric machine of any of claims 1-10, wherein, The insulation layer comprises a first insulation part, a second insulation part, a third insulation part, and a fourth insulation part, In the circumferential direction, the first insulation part and the second insulation part are arranged at intervals, and the surfaces of the first insulation part and the second insulation part that face away from each other respectively cover part of the stator winding, the third insulation part and the fourth insulation part are arranged at intervals along the radial direction of the rotating shaft, The third insulation part is connected to the first insulation part and the second insulation part respectively, and the fourth insulation part is connected to the first insulation part and the second insulation part respectively, so as to enclose the channel.

12. An electric drive system characterized by, The motor comprises any one of claims 1-11.

13. A vehicle characterized by comprising: The motor comprises a battery device and an electric drive system as claimed in claim 12, and the motor of the electric drive system is connected to the battery device.

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