CN220985387U - Stator and motor - Google Patents

Abstract

The utility model discloses a stator and a motor, wherein the stator comprises: the stator body is suitable for being matched with the inner peripheral wall of the motor shell so as to enable the motor shell to shield the open end of the runner groove, and a medium runner communicated with the runner groove is also formed in the stator body; the medium runner comprises a first flow section, a connecting flow section and a second flow section, wherein the first flow section and the second flow section extend along the axial direction of the stator body, the connecting flow section extends along the radial direction of the stator body and is communicated with the first flow section and the second flow section, and the first flow section is communicated with the runner groove. Therefore, according to the stator disclosed by the utility model, the first flow section and the second flow section form a double-layer cooling structure in the radial direction of the stator body, the heat exchange area of the medium flow channel is increased, the heat exchange is more uniform, the stator body has better heat dissipation performance, and the winding arranged on the stator body can indirectly dissipate heat through the stator body, so that the winding is fully cooled, and the performance of the motor is improved.

Description

Stator and motor

Technical Field

The utility model relates to the field of motors, in particular to a stator and a motor with the same.

Background

In the related art, in the working process of the existing stator, the heat dissipation performance of the existing stator body is poor, so that the windings assembled on the stator body cannot dissipate heat effectively, and the performance of a motor adopting the existing stator is poor.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a stator, which has better heat dissipation performance, so that windings mounted on the stator are sufficiently cooled.

The stator according to the present utility model includes:

The stator body is suitable for being matched with the inner peripheral wall of the motor shell so as to enable the motor shell to shield the open end of the runner groove, and a medium runner communicated with the runner groove is also formed in the stator body;

The medium runner comprises a first flow section, a connecting flow section and a second flow section, wherein the first flow section and the second flow section extend along the axial direction of the stator body, the connecting flow section extends along the radial direction of the stator body and is communicated with the first flow section and the second flow section, and the first flow section is communicated with the runner groove.

According to the stator disclosed by the utility model, the first flow section and the second flow section form a double-layer cooling structure in the radial direction of the stator body, so that the heat exchange area of the medium flow channel is increased, the heat exchange is more uniform, the stator body has better heat dissipation performance, and the winding arranged on the stator body can indirectly dissipate heat through the stator body, so that the winding is fully cooled, and the performance of the motor is improved.

In some examples of the utility model, the connecting flow section has a jet flow passage extending to an end face of the stator body in an axial direction of the stator body and corresponding to winding grooves of the stator body in a radial direction of the stator body;

the second flow section is positioned between two adjacent winding slots along the circumferential direction of the stator body.

In some examples of the present utility model, the stator body includes a first end body, a second end body, and a stator core, the first end body and the second end body being assembled at both ends of the stator core, respectively, in an axial direction of the stator body;

The outer peripheral wall of the stator core is formed with a runner groove, and the stator core is also formed with a first flow section and a second flow section which are arranged at intervals along the radial direction of the stator core, the first end body is assembled with the stator core to jointly define a connecting flow section, and/or the second end body is assembled with the stator core to jointly define the connecting flow section.

In some examples of the present utility model, the stator core includes a first core body, a second core body, and a third core body, the first core body and the third core body being assembled at both ends of the second core body in an axial direction of the stator core, outer diameters of the first core body and the third core body being R1, and outer diameter of the second core body being R2, satisfying a relation: r2 is less than R1.

In some examples of the utility model, the first core body and the third core body are each formed from a plurality of first lamination stacks, and the second core body is formed from a plurality of second lamination stacks;

The first punching sheet is provided with a first through hole, and a plurality of first punching sheets are stacked so that the first through holes are communicated to form a first flow section;

The first punching sheet is further provided with a second through hole, the second punching sheet is provided with a third through hole, the second through hole and the third through hole are correspondingly arranged along the axial direction of the stator core, and the plurality of first punching sheets and the plurality of second punching sheets are stacked so that the plurality of first through holes and the plurality of third through holes are communicated to form a second flow section.

In some examples of the present utility model, the first end body and the second end body have the same structure, and communication grooves are formed on one side surface of the first end body and the second end body, which are assembled with the stator core in a matching manner, and the communication grooves extend along the radial direction of the stator core and correspond to the first flow section and the second flow section.

In some examples of the utility model, the first end body and/or the second end body is formed with a through-hole structure in communication with the communication groove, the through-hole structure being configured as a jet flow passage.

In some examples of the utility model, the flow channel slot is adapted to communicate with a media supply flow channel of the motor housing.

In some examples of the present utility model, the plurality of medium flow channels are arranged in sequence along the circumferential direction of the stator body.

The motor according to the utility model comprises a stator as described above.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of an electric motor according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the structure of a media supply flow channel, a converging flow channel, and a media flow channel according to an embodiment of the present utility model;

fig. 3 is a perspective view of a stator according to an embodiment of the present utility model;

FIG. 4 is a side view of a stator according to an embodiment of the utility model;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is a first angular cross-sectional view of a stator according to an embodiment of the utility model;

FIG. 7 is a second angular cross-sectional view of a stator according to an embodiment of the utility model;

FIG. 8 is a third angular cross-sectional view of a stator according to an embodiment of the present utility model;

Fig. 9 is a fourth angular cross-sectional view of a stator according to an embodiment of the present utility model;

Fig. 10 is a perspective view of a stator core according to an embodiment of the present utility model;

FIG. 11 is a schematic view of a first die according to an embodiment of the utility model;

FIG. 12 is a schematic view of a second die according to an embodiment of the utility model;

FIG. 13 is a schematic view of a first end body according to an embodiment of the utility model;

fig. 14 is a schematic structural view of a second terminal body according to an embodiment of the present utility model.

Reference numerals:

A stator 100; a stator body 1; a first end body 11; a second end body 12; a stator core 13; a first core body 131; a second core body 132; a third core body 133; a flow channel groove 21; a converging flow passage 210; a medium flow passage 22; a first flow section 221; a connection flow section 222; a jet flow passage 220; a second flow section 223; a first punched sheet 31; a first through hole 311; a second through hole 312; a second die 32; a third through hole 321; a communication groove 41; a via structure 42; a winding 5; a motor 200; a motor housing 201; a fitting cavity 2011; a medium supply flow passage 2012; medium outlet 2012a.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The stator 100 according to the embodiment of the present utility model is described below with reference to fig. 1 to 14, and the stator 100 may be applied to an electric motor 200, but the present utility model is not limited thereto, and the stator 100 may be applied to other devices where the stator 100 is required to be disposed, for example: in the compressor, the present utility model is described by taking the stator 100 applied to the motor 200 as an example.

As shown in fig. 1 to 9, the stator 100 according to the embodiment of the present utility model includes a stator body 1, a flow channel groove 21 is formed in an outer circumferential wall of the stator body 1, the stator body 1 is adapted to cooperate with an inner circumferential wall of a motor housing 201 such that the motor housing 201 shields an open end of the flow channel groove 21, and a medium flow channel 22 communicating with the flow channel groove 21 is also formed in the stator body 1. The medium flow passage 22 includes a first flow section 221, a connecting flow section 222, and a second flow section 223, the first flow section 221 and the second flow section 223 each extend in the axial direction of the stator body 1, the connecting flow section 222 extends in the radial direction of the stator body 1 and communicates the first flow section 221 and the second flow section 223, and the first flow section 221 communicates with the flow passage groove 21.

In some embodiments of the present utility model, as shown in fig. 1, 3 and 4, the stator 100 is applied to the motor 200, and as shown in fig. 1, a motor housing 201 of the motor 200 is formed with a mounting cavity 2011, the stator 100 is adapted to be mounted in the mounting cavity 2011, and an inner peripheral wall of the motor housing 201 is adapted to cover an open end of the runner slot 21, so that the runner slot 21 and the motor housing 201 cooperate to define an annular bus duct 210.

In some embodiments, as shown in fig. 1, the motor housing 201 is formed with a medium supply flow passage 2012, and when the stator 100 is assembled to the motor housing 201, the flow passage groove 21 corresponds to a medium outlet 2012a of the medium supply flow passage 2012 in a radial direction of the stator 100, so that the flow passage groove 21 communicates with the medium supply flow passage 2012 to allow cooling oil of the motor 200 to flow into the confluence flow passage 210 through the medium supply flow passage 2012.

As shown in fig. 1 and fig. 2, the medium flow channel 22 is communicated with the flow channel groove 21, that is, the medium flow channel 22 is communicated with the converging flow channel 210, the cooling oil in the converging flow channel 210 flows along the first flow section 221, the connecting flow section 222 and the second flow section 223 in sequence, so that the cooling oil can fully fill the medium flow channel 22, and as shown in fig. 2 and fig. 6-fig. 9, the connecting flow section 222 extends along the radial direction of the stator body 1 and is communicated with the first flow section 221 and the second flow section 223, so that the first flow section 221 and the second flow section 223 form a double-layer cooling structure in the radial direction of the stator body 1, the heat exchange area of the medium flow channel 22 is increased, and the heat exchange is more uniform, so that the stator body 1 has better heat dissipation performance, the winding 5 mounted on the stator body 1 can dissipate heat indirectly through the stator body 1, so that the winding 5 can be fully cooled, the running condition of the motor 200 can be improved, the power density and the torque density of the motor 200 are increased, and the performance of the motor 200 is improved.

Therefore, according to the stator 100 of the embodiment of the present utility model, the first flow section 221 and the second flow section 223 form a double-layer cooling structure in the radial direction of the stator body 1, so that the heat exchange area of the medium flow channel 22 is increased and the heat exchange is more uniform, the stator body 1 has better heat dissipation performance, and the windings 5 mounted on the stator body 1 can indirectly dissipate heat through the stator body 1, so that the windings 5 are sufficiently cooled, thereby improving the running condition of the motor 200, increasing the power density and torque density of the motor 200, and improving the performance of the motor 200.

In addition, since the outer circumferential wall of the stator body 1 is adapted to be interference fit with the inner circumferential wall of the motor housing 201 when the stator 100 is assembled to the motor housing 201, so that the stator body 1 and the motor housing 201 together define the converging flow passage 210, and since the outer circumferential wall of the stator body 1 is interference fit with the inner circumferential wall of the motor housing 201, compared with the prior art, a fixing member for fixedly assembling the stator 100 in the motor housing 201 is not required, which is beneficial to reducing the components of the motor 200, realizing light design and reducing cost.

The present utility model is described by taking the stator 100 as an example applied to the motor 200, but the stator 100 may be applied to a compressor, and the stator body 1 is adapted to cooperate with an inner peripheral wall of a compressor housing so that the compressor housing shields an open end of the flow passage groove 21 when the stator 100 is applied to the compressor.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the number of medium flow channels 22 is plural, and the plurality of medium flow channels 22 are sequentially arranged along the circumferential direction of the stator body 1, so that the heat exchange area of the medium flow channels 22 is increased and the heat exchange is more uniform, so that the stator body 1 has better heat dissipation performance, and the windings 5 mounted on the stator body 1 can indirectly dissipate heat through the stator body 1, so that the windings 5 are sufficiently cooled.

In some embodiments, as shown in fig. 1 and 2, the stator body 1 has a plurality of groups of flow channels, and the groups of flow channels are sequentially arranged along the circumferential direction of the stator body 1, where each group of flow channels may include two medium flow channels 22, one medium flow channel 22 in the flow channel group is connected to one side of the flow channel 21, and another medium flow channel 22 in the flow channel group is connected to the other side of the flow channel 21, which is beneficial to increasing the heat exchange area of the medium flow channel 22 and making the heat exchange more uniform, so that the stator body 1 has better heat dissipation performance.

In some embodiments, as shown in fig. 1 and fig. 2, two medium flow channels 22 in the flow channel group are staggered along the circumferential direction of the stator body 1, which is beneficial to increasing the heat exchange area of the medium flow channels 22 and making the heat exchange more uniform, so that the stator body 1 has better heat dissipation performance.

In some embodiments of the present utility model, as shown in fig. 1-3 and 6-9, the connecting flow section 222 has the injection flow channel 220, the injection flow channel 220 extends to the end surface of the stator body 1 along the axial direction of the stator body 1, and the injection flow channel 220 corresponds to the winding 5 slot of the stator body 1 along the radial direction of the stator body 1.

As shown in fig. 3, a plurality of winding 5 slots are formed in the inner peripheral wall of the stator body 1, the winding 5 slots are sequentially arranged along the circumferential direction of the stator body 1, and the winding 5 slots are arranged to extend along the axial direction of the stator body 1, and the winding 5 slots are used for assembling the winding 5.

As shown in fig. 6 to 9, the injection flow passage 220 extends to the end face of the stator body 1 in the axial direction of the stator body 1, so that the cooling oil in the medium flow passage 22 is injected into the medium flow passage 22 through the injection flow passage 220, so that the cooling oil cools the windings 5 in the winding 5 slots provided in correspondence with the injection flow passage 220.

Compared with the prior art, according to the stator 100 of the embodiment of the present utility model, there is no need to provide an injection mechanism for injecting cooling oil, and the injection runner 220 is utilized to inject cooling oil to the winding 5, so that the injection mechanism is not required to be provided, and the injection mechanism is prevented from occupying the space of the assembly cavity 2011, which is beneficial to reducing the size of the motor housing 201 and the miniaturization of the motor 200, and when the motor 200 is applied to a vehicle, the motor 200 occupies the layout space of the vehicle, and the space utilization of the vehicle is improved.

In some embodiments of the present utility model, as shown in fig. 2 and 10, the second flow section 223 is located between adjacent two of the winding 5 slots in the circumferential direction of the stator body 1, so that the cooling oil in the second flow section 223 can cool the windings 5 fitted on both sides of the second flow section 223.

As shown in fig. 2, each group of windings 5 is composed of a plurality of copper wires, which are sequentially stacked and arranged along the radial direction of the stator body 1, and by providing the injection runner 220 corresponding to the winding 5 slots and the second runner 223 between two adjacent winding 5 slots, the simultaneous cooling of the multi-layer copper wires of the windings 5 is realized, so that the windings 5 can dissipate heat more uniformly, and the windings 5 can be sufficiently cooled.

In some embodiments of the present utility model, as shown in fig. 4, the stator body 1 includes a first end body 11, a second end body 12, and a stator core 13, and the first end body 11 and the second end body 12 are respectively assembled at both ends of the stator core 13 in an axial direction of the stator body 1. The outer circumferential wall of the stator core 13 is formed with a flow passage groove 21, and the stator core 13 is further formed with first and second flow sections 221 and 223 disposed at intervals in the radial direction of the stator core 13, the first end body 11 is assembled with the stator core 13 to define a connecting flow section 222 together, and/or the second end body 12 is assembled with the stator core 13 to define a connecting flow section 222 together, so that the first and second flow sections 221 and 223 communicate.

In some embodiments of the present utility model, as shown in the drawings, the stator core 13 includes a first core sub-body 131, a second core sub-body 132, and a third core sub-body 133, the first core sub-body 131 and the third core sub-body 133 being assembled at both ends of the second core sub-body 132 in an axial direction of the stator core 13, outer diameters of the first core sub-body 131 and the third core sub-body 133 being R1, and outer diameters of the second core sub-body 132 being R2, satisfying a relationship: r2 is less than R1.

When the first, second and third core bodies 131, 132 and 133 are assembled in a fit, the central axes of the first, second and third core bodies 131, 132 and 133 are collinear, and R2 < R1 is smaller than R1, so that the first, second and third core bodies 131, 132 and 133 are assembled to define the runner slot 21 together, thereby realizing the effect that the runner slot 21 is formed in the outer peripheral wall of the stator core 13.

In some embodiments of the present utility model, as shown in connection with fig. 5, 11 and 12, the first core body 131 and the third core body 133 are each formed by stacking a plurality of first laminations 31, the second core body 132 is formed by stacking a plurality of second laminations 32, the first laminations 31 have an outer diameter R1, and the second laminations 32 have an outer diameter R2, such that the first core body 131, the second core body 132 and the third core body 133 cooperate to collectively define the runner slot 21.

In some embodiments of the present utility model, as shown in fig. 8, 10 and 11, the first punched sheets 31 are formed with first through holes 311, the plurality of first punched sheets 31 are stacked such that the plurality of first through holes 311 communicate to form the first flow section 221, and when the plurality of first punched sheets 31 are stacked, the first through holes 311 of adjacent two first punched sheets 31 correspond to and communicate such that the first through holes 311 of the plurality of first punched sheets 31 communicate to form the first flow section 221, and the first flow section 221 is disposed to extend in the axial direction of the stator core 13.

In some embodiments, the first punch 31 has a plurality of first through holes 311, and the plurality of first through holes 311 are sequentially arranged along the circumferential direction of the first punch 31, so that the stator core 13 has a plurality of first flow sections 221 sequentially arranged along the circumferential direction of the stator core 13.

In some embodiments of the present utility model, as shown in fig. 8, 9, 10, 11, and 12, the first punch 31 is further formed with a second through hole 312, the second punch 32 is formed with a third through hole 321, the second through hole 312 is disposed corresponding to the third through hole 321 in the axial direction of the stator core 13, and the plurality of first punch 31 and the plurality of second punch 32 are stacked such that the plurality of first through holes 311 and the plurality of third through holes 321 communicate to form the second flow section 223.

In some embodiments, the first core body 131 and the third core body 133 are each formed by stacking a plurality of first punched sheets 31, and when the plurality of first punched sheets 31 are stacked, the second through holes 312 of two adjacent first punched sheets 31 correspond to and communicate with each other, so that the first through holes 311 of the plurality of first punched sheets 31 communicate with each other to form part of the structure of the second flow section 223.

In some embodiments, the second core body 132 is formed by stacking a plurality of second punched sheets 32, and when the plurality of second punched sheets 32 are stacked, the third through holes 321 of two adjacent second punched sheets 32 correspond to and communicate with each other, so that the third through holes 321 of the plurality of second punched sheets 32 communicate with each other to form a part of the structure of the second flow section 223.

Thus, the first core body 131, the second core body 132, and the third core body 133 cooperate together to form a second flow section 223, and the second flow section 223 is provided to extend in the axial direction of the stator core 13.

In some embodiments, the first punch 31 has a plurality of second through holes 312, the plurality of second through holes 312 are sequentially arranged along the circumferential direction of the first punch 31, the second punch 32 has a plurality of third through holes 321, and the plurality of third through holes 321 are sequentially arranged along the circumferential direction of the second punch 32, so that the stator core 13 has a plurality of second flow sections 223 sequentially arranged along the circumferential direction of the stator core 13.

In some embodiments of the present utility model, as shown in fig. 8, 13 and 14, the first end body 11 and the second end body 12 have the same structure, and the first end body 11 and the second end body 12 are formed with a communication groove 41 on one side surface of the stator core 13, and the communication groove 41 extends along the radial direction of the stator core 13 and corresponds to the first flow section 221 and the second flow section 223.

In some embodiments, when the first end body 11 is assembled with the stator core 13, the surface of the stator core 13 seals the open end of the communication slot 41 of the first end body 11, so that the first end body 11 is assembled with the stator core 13 to form the second flow section 223, and the communication slot 41 of the first end body 11 corresponds to both the first flow section 221 and the second flow section 223 along the axial direction of the stator core 13, so that the second flow section 223 communicates with the first flow section 221 and the second flow section 223.

In some embodiments, when the second end body 12 is assembled with the stator core 13, the surface of the stator core 13 seals the open end of the communication slot 41 of the second end body 12, so that the second end body 12 is assembled with the stator core 13 to form the second flow section 223, and the communication slot 41 of the second end body 12 corresponds to the first flow section 221 and the second flow section 223 along the axial direction of the stator core 13, so that the second flow section 223 communicates with the first flow section 221 and the second flow section 223.

In some embodiments of the present utility model, as shown in connection with fig. 3 and 8, the first end body 11 and/or the second end body 12 is formed with a through-hole structure 42 communicating with the communication groove 41, the through-hole structure 42 being configured as the injection flow passage 220.

In some embodiments, the first end body 11 and the second end body 12 are each formed with a through hole structure 42, or alternatively, one of the first end body 11 and the second end body 12 is formed with a through hole structure 42, as shown in fig. 8, and in some embodiments of the present utility model, the first end body 11 and the second end body 12 are each illustrated as having a through hole structure 42.

In some embodiments of the present utility model, taking the through hole structure 42 provided in the first end body 11 as an example, along the axial direction of the stator body 1, one end of the through hole structure 42 of the first end body 11 communicates with the bottom wall of the communication slot 41 of the first end body 11, and the other end of the through hole structure 42 of the first end body 11 extends to the end surface of the first end body 11 far away from the stator core 13, so that the cooling oil in the medium flow passage 22 is ejected out of the medium flow passage 22 through the ejection flow passage 220, so that the cooling oil cools the winding 5 in the winding 5 slot provided correspondingly to the ejection flow passage 220.

The motor 200 according to the embodiment of the utility model includes the stator 100 of the above embodiment, the stator body 1 of the stator 100 has better heat dissipation performance, and the windings 5 mounted on the stator body 1 can indirectly dissipate heat through the stator body 1, so that the windings 5 are sufficiently cooled, thereby improving the operation condition of the motor 200, increasing the power density and torque density of the motor 200, and improving the performance of the motor 200. It should be noted that the features and advantages described above with respect to the stator 100 are equally applicable to the motor 200, and are not repeated here.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A stator (100), characterized by comprising:

A stator body (1), wherein a flow channel groove (21) is formed on the outer peripheral wall of the stator body (1), the stator body (1) is suitable for being matched with the inner peripheral wall of a motor shell (201) so that the motor shell (201) shields the open end of the flow channel groove (21), and a medium flow channel (22) communicated with the flow channel groove (21) is also formed in the stator body (1);

The medium runner (22) comprises a first runner section (221), a connecting runner section (222) and a second runner section (223), wherein the first runner section (221) and the second runner section (223) are both extended along the axial direction of the stator body (1), the connecting runner section (222) is extended along the radial direction of the stator body (1) and communicated with the first runner section (221) and the second runner section (223), and the first runner section (221) is communicated with the runner groove (21).

2. The stator (100) according to claim 1, characterized in that the connecting flow section (222) has a jet flow channel (220), the jet flow channel (220) extending in the axial direction of the stator body (1) to the stator body (1) end face and in the radial direction of the stator body (1), the jet flow channel (220) corresponding to a winding slot of the stator body (1);

the second flow section (223) is located between two adjacent winding slots along the circumferential direction of the stator body (1).

3. The stator (100) according to claim 2, wherein the stator body (1) includes a first end body (11), a second end body (12) and a stator core (13), and the first end body (11) and the second end body (12) are respectively fitted at both ends of the stator core (13) in an axial direction of the stator body (1);

The stator core (13) is provided with the runner groove (21) on the outer peripheral wall thereof, and the stator core (13) is further provided with the first flow section (221) and the second flow section (223) which are arranged at intervals along the radial direction of the stator core (13), the first end body (11) is assembled with the stator core (13) to jointly define the connecting flow section (222), and/or the second end body (12) is assembled with the stator core (13) to jointly define the connecting flow section (222).

4. The stator (100) according to claim 3, wherein the stator core (13) includes a first core body (131), a second core body (132) and a third core body (133), the first core body (131) and the third core body (133) are assembled at both ends of the second core body (132) in an axial direction of the stator core (13), outer diameters of the first core body (131) and the third core body (133) are R1, and an outer diameter of the second core body (132) is R2, satisfying a relation: r2 is less than R1.

5. The stator (100) of claim 4, wherein the first core body (131) and the third core body (133) are each formed from a stack of a plurality of first laminations (31), and the second core body (132) is formed from a stack of a plurality of second laminations (32);

The first punching sheet (31) is formed with a first through hole (311), a plurality of the first punching sheets (31) are stacked so that the plurality of the first through holes (311) communicate to form the first flow section (221);

The first punching sheet (31) is further provided with a second through hole (312), the second punching sheet (32) is provided with a third through hole (321), the second through hole (312) is arranged corresponding to the third through hole (321) along the axial direction of the stator core (13), and a plurality of the first punching sheets (31) and a plurality of the second punching sheets (32) are stacked so that a plurality of the first through holes (311) and a plurality of the third through holes (321) are communicated to form the second flow section (223).

6. A stator (100) according to claim 3, wherein the first end body (11) and the second end body (12) have the same structure, and communication grooves (41) are formed on one side surface of the first end body (11) and the second end body (12) which are assembled with the stator core (13), and the communication grooves (41) are arranged along the radial extension of the stator core (13) and correspond to the first flow section (221) and the second flow section (223).

7. The stator (100) according to claim 6, characterized in that the first end body (11) and/or the second end body (12) is formed with a through-hole structure (42) communicating with the communication groove (41), the through-hole structure (42) being configured as the injection runner (220).

8. The stator (100) of claim 1, wherein the flow channel slot (21) is adapted to communicate with a media supply flow channel (2012) of the motor housing (201).

9. The stator (100) according to any one of claims 1 to 8, wherein the medium flow passage (22) is plural, and the plural medium flow passages (22) are sequentially arranged in the circumferential direction of the stator body (1).

10. An electric machine (200), characterized by comprising a stator (100) according to any one of claims 1-9.