CN219999120U - Heat exchange structure, stator core and motor - Google Patents
Heat exchange structure, stator core and motor Download PDFInfo
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- CN219999120U CN219999120U CN202320966657.8U CN202320966657U CN219999120U CN 219999120 U CN219999120 U CN 219999120U CN 202320966657 U CN202320966657 U CN 202320966657U CN 219999120 U CN219999120 U CN 219999120U
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- channel group
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- heat exchange
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- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000306 component Substances 0.000 claims 6
- 239000008358 core component Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model belongs to the technical field of motors, and particularly relates to a heat exchange structure, a stator core (100) and a motor (909); the heat exchange of the stator is improved by arranging a second channel group (120) in the winding gap of the stator core (100), and the heat exchange area is further increased by additionally arranging a first channel group (110); furthermore, the axial sub-channels are set to a specific number in combination with structural parameters of the motor (909); not only the heat exchange process inside the stator is balanced, but also the mechanical strength and the process feasibility of the stator are ensured; wherein the number of stages and teeth of the motor (909) is used as the number of custom axial channels; by cooperating with the end cap member (300), in combination with the preset diversion holes on the end cap member (300), the heat exchange medium from the stator core (100) is further led to other components needing temperature rise control, thereby realizing the temperature regulation of the whole system of the motor (909).
Description
Technical Field
The utility model belongs to the technical field of motors, and particularly relates to a heat exchange structure, a stator core and a motor.
Background
When the motor provides power for the vehicle, the working temperature of the motor needs to be reasonably controlled, and the power density of the motor can be improved through a good temperature rise state. Wherein, when the related art is used for treating stator cooling, the technical scheme is relatively deficient, and the heat exchange efficiency is required to be improved.
Disclosure of Invention
The utility model discloses a heat exchange structure, which comprises an improved stator core structure; the stator core comprises a second channel group, wherein the second channel group penetrates through the first end face and the second end face of the stator core along the axial direction of the motor; the second channel group is communicated with a supply or storage component of the circulating medium between the first end surface and the second end surface through a third channel group; the cross section of the second channel group is distributed in a third annular area between the first outer annular envelope and the second inner annular envelope; the area of a third embedded area, where the third annular area intersects with the cross section of the stator slot, is larger than 0.
Further, in order to improve the heat exchange efficiency, the heat exchange area may also be increased by introducing the first channel group.
Specifically, the first channel group may be provided in the stator core, and the first channel group similarly penetrates through the first end face and the second end face of the stator core in the motor axis direction; and the first channel group is communicated with the second channel group through the third channel group.
Corresponding to the actual motor, the first channel group can adopt M first sub-channels distributed annularly; the second channel group adopts Z second sub-channels distributed annularly; m, Z are positive integers; because the radii of the first sub-channel and the second sub-channel are different, M and Z can be generally unequal; at this time, the distribution of the heat exchange area will be more uniform.
Further, the cross-sectional shape of each first sub-channel may be the same, and the cross-sectional shape of each second sub-channel may also be the same; furthermore, the length of each first sub-channel in the motor axial direction is the same, and the length of each second sub-channel in the motor axial direction is the same, which results in a locally flat dimension of the core made by the lamination.
The number M of the first sub-channels can be set to be 2n times of the pole pair number p of the motor, and n is a natural number; the number Z of second sub-channels may be set to the number of teeth of the motor.
In addition, in order to make the thermal field distribution more uniform, the second sub-channels thereof may be arranged in a structure alternately distributed with the stator slots.
Further, the stator core can be fixedly connected or detachably connected with the motor end cover component; and such that the stator core is also detachably connected to the end windings which are to be interposed inside the cavity formed by the stator core and the end cap member.
In addition, the end cover part of the motor can comprise a preset number of communication holes, one end of each communication hole is communicated with the first channel group and/or the second channel group, and the other end of each communication hole is communicated with the end winding, the rotor core, the bearing part, the motor axis and other parts needing heat exchange.
Correspondingly, the embodiment of the utility model also discloses a stator core, which comprises a second channel group, wherein the second channel group penetrates through the first end face and the second end face of the stator core along the axial direction of the motor; the second channel group is communicated with a supply or storage component of the circulating medium between the first end surface and the second end surface through a third channel group; the cross section of the second channel group is distributed in a third annular area between the first outer annular envelope and the second inner annular envelope; the area of a third embedded area, where the third annular area intersects with the cross section of the stator slot, is larger than 0.
Further, in order to improve the heat exchange efficiency, the heat exchange area may also be increased by introducing the first channel group.
Specifically, the first channel group may be provided in the stator core, and the first channel group similarly penetrates through the first end face and the second end face of the stator core in the motor axis direction; and the first channel group is communicated with the second channel group through the third channel group.
Corresponding to the actual motor, the first channel group can adopt M first sub-channels distributed annularly; the second channel group adopts Z second sub-channels distributed annularly; m, Z are positive integers; because the radii of the first sub-channel and the second sub-channel are different, M and Z can be generally unequal; at this time, the distribution of the heat exchange area will be more uniform.
Further, the cross-sectional shape of each first sub-channel may be the same, and the cross-sectional shape of each second sub-channel may also be the same; furthermore, the length of each first sub-channel in the motor axial direction is the same, and the length of each second sub-channel in the motor axial direction is the same, which results in a locally flat dimension of the core made by the lamination.
The number M of the first sub-channels can be set to be 2n times of the pole pair number p of the motor, and n is a natural number; the number Z of second sub-channels may be set to the number of teeth of the motor.
In addition, in order to make the thermal field distribution more uniform, the second sub-channels thereof may be arranged in a structure alternately distributed with the stator slots.
Further, the stator core may be fixedly connected or detachably connected to the motor end cover member; and such that the stator core is also detachably connected to the end windings which are to be interposed inside the cavity formed by the stator core and the end cap member.
In addition, the side of the end cover component matched with the end cover component near the stator core can comprise a preset number of communication holes, one end of each communication hole is communicated with the first channel group and/or the second channel group, and the other end of each communication hole is communicated with the end winding, the rotor core, the bearing component, the motor axis and other components needing heat exchange.
Likewise, the embodiment of the utility model also discloses a motor which adopts any heat exchange structure and/or any stator core; the structure and shape thereof will not be described in detail.
In summary, the heat exchange of the stator is improved by arranging the second channel group (120) in the winding gap of the stator core (100), and the heat exchange area is further increased by additionally arranging the first channel group (110); furthermore, the axial sub-channels are set to a specific number in combination with structural parameters of the motor (909); not only the heat exchange process inside the stator is balanced, but also the mechanical strength and the process feasibility of the stator are ensured.
Wherein the number of stages and teeth of the motor (909) is used as the number of custom axial channels; by cooperating with the end cap member (300), in combination with the preset diversion holes on the end cap member (300), the heat exchange medium from the stator core (100) is further led to other components needing temperature rise control, thereby realizing the temperature regulation of the whole system of the motor (909).
It should be noted that, the terms "first", "second", and the like are used herein merely to describe each component in the technical solution, and do not constitute a limitation on the technical solution, and are not to be construed as indicating or implying importance of the corresponding component; elements with "first", "second" and the like mean that in the corresponding technical solution, the element includes at least one.
Drawings
In order to more clearly illustrate the technical solution of the present utility model, the technical effects, technical features and objects of the present utility model will be further understood, and the present utility model will be described in detail below with reference to the accompanying drawings, which form a necessary part of the specification, and together with the embodiments of the present utility model serve to illustrate the technical solution of the present utility model, but not to limit the present utility model.
Like reference numerals in the drawings denote like elements.
Specifically:
fig. 1 is a schematic cross-sectional view of a stator core according to an embodiment of the present utility model.
Fig. 2 is a schematic cross-sectional view of a stator core according to an embodiment of the present utility model, partially enlarged.
FIG. 3 is a schematic diagram of a heat exchange structure according to an embodiment of the present utility model.
Fig. 4 is a schematic diagram of an embodiment of the motor and its application layout in a vehicle.
Fig. 5 is a schematic diagram of a stator core and its application layout in a motor system according to the present utility model.
Fig. 6 is a schematic diagram of a cross section of a stator core according to an embodiment of the present utility model.
Fig. 7 is a schematic cross-sectional view of a stator core according to an embodiment of the present utility model.
Fig. 8 is a schematic cross-sectional view of a stator core in the related art.
Wherein:
100-stator core;
101-a first end face;
102-a second end face;
110-a first channel group;
111-stator core in related art;
120-a second channel group;
130-stator slot cross section;
131-a first outer ring envelope;
132-a second inner ring envelope;
133-a third embedded region;
199-third channel group;
200-rotor core;
300-end cap member;
400-end windings;
500-motor axis;
555-motor rotating shaft;
600-bearing parts;
900-vehicle;
909-a motor;
969-medium circulation power component;
999-heat exchange pipeline.
Description of the embodiments
The present utility model will be described in further detail with reference to the accompanying drawings and examples. Of course, the following specific examples are set forth only to illustrate the technical solution of the present utility model, and are not intended to limit the present utility model. Furthermore, the parts expressed in the examples or drawings are merely illustrative of the relevant parts of the present utility model, and not all of the present utility model.
The heat exchange structure shown in fig. 6 and 7 includes a stator core 100; the stator core 100 includes a second channel group 120, and the second channel group 120 penetrates through the first end face 101 and the second end face 102 of the stator core 100 along the motor axis 500 direction as shown in fig. 3.
Further, as shown in fig. 3, the second channel group 120 communicates with a supply or receiving member of the circulating medium between the first end face 101 and the second end face 102 via the third channel group 199; the cross-section of the second set of channels 120 is distributed in a third annular region between the first outer annular envelope 131 and the second inner annular envelope 132 as shown in fig. 7; the area of the third embedded region 133 where the third annular region intersects the stator slot cross-section 130 is greater than 0.
Further, in order to increase the heat exchange area, a first channel group 110 as shown in fig. 1 and 2 may be provided inside the stator core 100.
As shown in fig. 3, the first channel group 110 penetrates the first end face 101 and the second end face 102 of the stator core 100 in the motor axis 500 direction; the first channel group 110 communicates with the second channel group 120 via the third channel group 199 described above.
Wherein, the first channel group 110 may be provided with M first sub-channels distributed annularly; the second channel group 120 may be provided with Z second sub-channels distributed annularly; m, Z are all positive integers.
Further, the cross-sectional shape of each first sub-channel may be set to the same shape, and the cross-sectional shape of each second sub-channel may be set to the same shape as well; the length of each first sub-channel along the axial direction of the motor 909 as shown in fig. 3 is the same, and the length of each second sub-channel along the axial direction of the motor 909 may be the same.
Specifically, when corresponding to some motors, the number M of the first sub-channels of the motor can be equal to 2n times of the pole pair number p of the motor, and n is a natural number; the number Z of second sub-channels may be equal to the number of teeth of the motor; wherein the second sub-channels will alternate with stator slots.
Further, as shown in fig. 3, the stator core 100 thereof is fixedly connected or detachably connected with the end cover member 300; the stator core 100 is detachably connected to the end winding 400, and the end winding 400 is interposed in a cavity formed by the stator core 100 and the end cover member 300.
In addition, the end cap member 300 may be provided with a predetermined number of communication holes at one end thereof communicating with the first channel group 110 and/or the second channel group 120 at the side near the stator core 100, and at the other end thereof opening into the end winding 400, the rotor core 200, the bearing member 600 and/or the motor axis 500.
Accordingly, as shown in fig. 6 and 7, the stator core 100 disclosed in the embodiment of the present utility model includes a second channel group 120, and the second channel group 120 penetrates through the first end face 101 and the second end face 102 of the stator core 100 along the motor axis 500 direction shown in fig. 3.
Further, as shown in fig. 3, the second channel group 120 communicates with a supply or receiving member of the circulating medium between the first end face 101 and the second end face 102 via the third channel group 199; the cross-section of the second set of channels 120 is distributed in a third annular region between the first outer annular envelope 131 and the second inner annular envelope 132 as shown in fig. 7; the area of the third embedded region 133 where the third annular region intersects the stator slot cross-section 130 is greater than 0.
Further, in order to increase the heat exchange area, a first channel group 110 as shown in fig. 1 and 2 may be provided inside the stator core 100.
As shown in fig. 3, the first channel group 110 penetrates the first end face 101 and the second end face 102 of the stator core 100 in the motor axis 500 direction; the first channel group 110 communicates with the second channel group 120 via the third channel group 199 described above.
Wherein, the first channel group 110 may be provided with M first sub-channels distributed annularly; the second channel group 120 may be provided with Z second sub-channels distributed annularly; m, Z are all positive integers.
Further, the cross-sectional shape of each first sub-channel may be set to the same shape, and the cross-sectional shape of each second sub-channel may be set to the same shape as well; the length of each first sub-channel along the axial direction of the motor 909 as shown in fig. 3 is the same, and the length of each second sub-channel along the axial direction of the motor 909 may be the same.
Specifically, when corresponding to some motors, the number M of the first sub-channels of the motor can be equal to 2n times of the pole pair number p of the motor, and n is a natural number; the number Z of second sub-channels may be equal to the number of teeth of the motor; wherein the second sub-channels will alternate with stator slots.
Further, as shown in fig. 3, the stator core 100 thereof is fixedly connected or detachably connected with the end cover member 300; the stator core 100 is detachably connected to the end winding 400, and the end winding 400 is interposed in a cavity formed by the stator core 100 and the end cover member 300.
In addition, the end cap member 300 may be provided with a predetermined number of communication holes at one end thereof communicating with the first channel group 110 and/or the second channel group 120 at the side near the stator core 100, and at the other end thereof opening into the end winding 400, the rotor core 200, the bearing member 600 and/or the motor axis 500.
Accordingly, embodiments of the present utility model also disclose an electric machine 909 comprising a heat exchange structure as defined in any one of the above and/or a stator core 100 as defined in any one of the above; the temperature rise control of the motor can be improved as well.
In practical application, the cooling efficiency is improved through the first channel group and/or the second channel group embedded in the motor stator, and the output capacity of the motor is increased.
In general, during the operation of the motor, copper loss is generated in the stator winding, and the higher the temperature is, the larger the copper loss is; the output efficiency of the motor is correspondingly reduced; wherein, the continuous high temperature operation of the copper windings also shortens the insulation life of the motor.
In the technical scheme disclosed by the embodiment of the utility model, the heat generated by the stator is taken away effectively; on the one hand, two groups of parallel heat transfer paths are arranged in the radial direction; the cooling circuit 2, namely the second channel group 120 is closer to the stator winding, so that heat generated by the winding can be efficiently taken away; the other cooling circuit 1, i.e., the first channel group 110, is closer to the outer edge of the core stator 100, and may further carry away heat generated by the motor 909.
Furthermore, the two-channel or single-channel cooling medium formed by the first channel group 110 and/or the second channel group 120 can be used in the axial direction to remove the heat of the winding head by spraying.
Fig. 1 is a radial schematic diagram of a parallel oil circuit composite cooling design of a stator core 100 of a motor 909, that is, a schematic diagram of a cross section of the stator core according to an embodiment of the present utility model.
FIG. 2 is an enlarged view of a portion of FIG. 1; FIG. 3 is a schematic diagram of a heat exchange structure in accordance with an embodiment of the present utility model; in fig. 3, the cooling oil, i.e. the heat exchange medium, flows in from the axial middle part of the motor; then, the two parallel branches are divided into two radial branches to continue circulation.
Wherein, the radial oil passage 1, i.e. the first channel group 110, has m=96 (m=2pχn, where p is the pole pair number and n is the natural number) cooling through holes passing through axially; the oil passage 2 in the radial direction, that is, the second passage group 120 has a total of z=48 (Z is the number of teeth) cooling oil holes penetrating in the axial direction.
In actual operation, cooling oil enters a closed cavity between the end cover and the iron core after passing through the oil holes, and flows out of two ends of the motor through the oil holes on the end cover, and sprays and cools the end windings of the motor; and the oil is sprayed to the motor bearing along with gravity, then flows into an oil collecting groove at the bottom of the motor, and is further brought into a cooling circulation loop by an oil pump.
In addition, in the axial arrangement, the motor stator core 100 and the front and rear end caps may be fixed by oil-proof seal rings, and oil-passing holes arranged in the circumferential direction are measured in the end cap member 300.
In the implementation process of the product, the design is frozen only in the mold opening stage of the motor iron core and the product contains the corresponding mechanical dimension characteristics, and the following technical effects are obtained.
On one hand, under the same temperature limiting strategy, the continuous performance of the motor is improved; for example, under the condition of the pole pair number and the tooth number as shown in fig. 1, the continuous performance of the motor can be improved by about 8.6%, and the power output capacity of a load such as an electric vehicle can be effectively improved.
On the other hand, since the core member increases the oil passage 2, i.e., the second passage group 120, the weight of the motor stator core 100 is reduced; for the pole configuration shown in fig. 1, the core weight can be reduced by about 2.6%; the material is saved, and the product is light.
The utility model can realize the compound cooling of the parallel oil circuit of the motor stator, and the number and the size of the medium circulation channels, namely the oil holes, can be flexibly selected; for example, the number of pole slots of the motor shown in fig. 1 is only one of the possible embodiments, and can be extended to other different pole slot combinations; for the motor end oil circuit, the end cover closed loop can be adopted, but the auxiliary cooling can also be realized through the oil collecting disc.
Furthermore, under the same conditions, the related components will be cooled more effectively due to the improved heat exchange efficiency of the present utility model; for motors, it is also advantageous to obtain higher energy densities; for its loads, such as electric vehicles, a longer range will also be obtained.
It should be noted that the foregoing examples are merely for clearly illustrating the technical solution of the present utility model, and those skilled in the art will understand that the embodiments of the present utility model are not limited to the foregoing, and that obvious changes, substitutions or alterations can be made based on the foregoing without departing from the scope covered by the technical solution of the present utility model; other embodiments will fall within the scope of the utility model without departing from the inventive concept.
Claims (12)
1. A heat exchange structure comprising a stator core (100); the stator core (100) comprises a second channel group (120), and the second channel group (120) penetrates through a first end face (101) and a second end face (102) of the stator core (100) along the direction of a motor axis (500); the second channel group (120) is communicated with a supply or storage component of circulating medium between the first end face (101) and the second end face (102) through a third channel group (199); the cross-section of the second channel group (120) is distributed in a third annular region between the first outer annular envelope (131) and the second inner annular envelope (132); the area of a third embedded region (133) where the third annular region intersects the stator slot cross-section (130) is greater than 0.
2. The heat exchange structure of claim 1, wherein: the stator core (100) further comprises a first channel group (110), and the first channel group (110) penetrates through a first end face (101) and a second end face (102) of the stator core (100) along the direction of a motor axis (500); the first channel group (110) communicates with the second channel group (120) via the third channel group (199).
3. The heat exchange structure of claim 1 or 2, wherein: the first channel group (110) comprises M first sub-channels distributed annularly; the second channel group (120) comprises Z second sub-channels distributed annularly; m, Z are all positive integers.
4. A heat exchange structure as claimed in claim 3, wherein: the cross-sectional shape of each first sub-channel is the same, and the cross-sectional shape of each second sub-channel is the same; the length of each first sub-channel along the axial direction of the motor (909) is the same, and the length of each second sub-channel along the axial direction of the motor (909) is the same.
5. The heat exchange structure of claim 4, wherein: the number M of the first sub-channels is equal to 2n times the pole pair number p of the motor (909), n being a natural number; the number Z of second sub-channels is equal to the number of teeth of the motor (909).
6. The heat exchange structure of any one of claims 4 or 5, wherein: the second sub-channels and the stator wire slots are alternately distributed.
7. The heat exchange structure of any one of claims 1, 2, 4, or 5, wherein: the stator core (100) is fixedly connected or detachably connected with the end cover component (300); the stator core (100) is detachably connected with an end winding (400), and the end winding (400) is arranged in a cavity formed by the stator core (100) and the end cover component (300).
8. The heat exchange structure of claim 7, wherein: one side of the end cover component (300) close to the stator core (100) comprises a preset number of communication holes, one end of each communication hole is communicated with the first channel group (110) and/or the second channel group (120), and the other end of each communication hole is communicated with the end winding (400), the rotor core (200), the bearing component (600) and/or the motor axis (500).
9. A stator core (100) comprising a second channel group (120), the second channel group (120) penetrating through a first end face (101) and a second end face (102) of the stator core (100) along a motor axis (500) direction; the second channel group (120) is communicated with a supply or storage component of circulating medium between the first end face (101) and the second end face (102) through a third channel group (199); the cross-section of the second channel group (120) is distributed in a third annular region between the first outer annular envelope (131) and the second inner annular envelope (132); the area of a third embedded region (133) where the third annular region intersects the stator slot cross-section (130) is greater than 0.
10. The stator core (100) of claim 9, further comprising a first channel group (110), the first channel group (110) extending through the first end face (101) and the second end face (102) of the stator core (100) in a direction of the motor axis (500); the first channel group (110) communicates with the second channel group (120) via the third channel group (199).
11. A stator core (100) according to claim 9 or 10, comprising a core component of a stator in a motor heat exchange structure according to any one of claims 3 to 8.
12. An electric machine (909) comprising a heat exchange structure according to any one of claims 1 to 8 and/or a stator core (100) according to any one of claims 9 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320966657.8U CN219999120U (en) | 2023-04-26 | 2023-04-26 | Heat exchange structure, stator core and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320966657.8U CN219999120U (en) | 2023-04-26 | 2023-04-26 | Heat exchange structure, stator core and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219999120U true CN219999120U (en) | 2023-11-10 |
Family
ID=88608758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320966657.8U Active CN219999120U (en) | 2023-04-26 | 2023-04-26 | Heat exchange structure, stator core and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219999120U (en) |
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2023
- 2023-04-26 CN CN202320966657.8U patent/CN219999120U/en active Active
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