CN111725907A - Stator module and axial magnetic field motor - Google Patents
Stator module and axial magnetic field motor Download PDFInfo
- Publication number
- CN111725907A CN111725907A CN201910208603.3A CN201910208603A CN111725907A CN 111725907 A CN111725907 A CN 111725907A CN 201910208603 A CN201910208603 A CN 201910208603A CN 111725907 A CN111725907 A CN 111725907A
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- China
- Prior art keywords
- stator
- cover plate
- shell
- pole shoe
- oil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a stator assembly and an axial magnetic field motor, wherein the stator assembly comprises a shell, a stator core, a coil, a pole shoe and a stator cover plate, wherein the stator core, the coil and the pole shoe are arranged in a space enclosed by the shell and the stator cover plate; the coil is arranged in an open slot of the stator core; the pole shoe is fixed on the stator cover plate, and when the stator cover plate is in butt joint with the shell, the pole shoe can be arranged at the notch of the open slot. The stator core is provided with the open slot, so that the coil is convenient to mount, meanwhile, the pole shoe is fixed on the stator cover plate, when the stator cover plate is in butt joint with the shell, the pole shoe corresponds to the notch of the open slot, so that the tooth harmonic wave of the motor can be reduced, the iron loss of the motor is reduced, the efficiency of the motor is improved, and the torque pulsation of the motor is reduced. Because the pole shoe is borne on the stator cover plate, the pole shoe can be matched with the open slot after the stator cover plate and the shell are directly butted during assembly, thereby improving the production efficiency of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a stator assembly and an axial magnetic field motor.
Background
The existing automobile driving motor has complex operation condition, and various losses can be generated in the operation process of the motor due to the structural characteristics of the motor, so that the motor is heated. In order to improve the convenience of installing the coil, the slots on the stator core are of an open slot structure, and the degree of air gap harmonic waves is reduced by arranging slot wedges. However, the installation of the slot wedge also increases the production efficiency of the generator. Therefore, how to improve the production efficiency of the motor becomes a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is how to improve the production efficiency of the motor, and therefore, the present invention provides a stator assembly and an axial magnetic field motor.
In order to achieve the purpose, the invention provides the following technical scheme:
a stator assembly comprises a shell, a stator core, a coil, a pole shoe and a stator cover plate, wherein the stator core, the coil and the pole shoe are arranged in a space enclosed by the shell and the stator cover plate; the coil is arranged in an open slot of the stator core, the pole shoe is fixed on the stator cover plate, and when the stator cover plate is butted with the shell, the pole shoe can be arranged at a notch of the open slot; a first cooling space is defined by the outer circular ring of the stator core and the shell, a second cooling space is defined by the inner circular ring of the stator core and the shell, and the first cooling space is communicated with the second cooling space;
an oil inlet cavity and an oil return cavity are formed in the wall of the shell, an oil inlet and an oil outlet are formed in the outer wall of the shell, the oil inlet is communicated with the oil inlet cavity, and the oil outlet is communicated with the oil return cavity; the oil injection hole and the oil return hole are formed in the inner wall of the shell, the oil injection hole is communicated with the first cooling space and the oil inlet cavity, and the oil return hole is communicated with the first cooling space and the oil return cavity.
In one embodiment of the invention, the stator cover plate is fixed to the housing by means of screws, clamps, welding, riveting or dovetails.
In one embodiment of the invention, the end surface of the stator cover plate close to the stator core is provided with a slot rib extending along the radial direction of the stator cover plate and a core tooth slot corresponding to the stator core.
In one embodiment of the present invention, the number of the slot ribs is equal to the number of the open slots of the stator core, and one pole shoe is disposed on both sides of each slot rib.
In one embodiment of the invention, the pole shoe extends along the length direction of the stator cover plate, and the length of the pole shoe is the same as that of the notch of the open slot in the radial direction of the stator cover plate.
In one embodiment of the invention, the sum of the widths of the slot ribs and the pole shoes on both sides of the slot ribs is consistent with the width of the notches of the open slots.
In one embodiment of the invention, the pole pieces are machined from SMC.
In one embodiment of the invention, the stator cover plate is made of a non-magnetic high-strength glass fiber composite material or high-strength plastic.
In one embodiment of the invention, the coil is a shaped coil.
In one embodiment of the invention, an axial field motor is also disclosed, comprising a stator assembly as described in any of the above.
According to the technical scheme, the stator core is provided with the open slot, so that the coil is convenient to mount, meanwhile, the pole shoe is fixed on the stator cover plate, when the stator cover plate is in butt joint with the shell, the pole shoe corresponds to the slot opening of the open slot, so that the tooth harmonic of the motor can be reduced, the iron loss of the motor is reduced, the efficiency of the motor is improved, and the torque ripple of the motor is reduced. Because the pole shoe is borne on the stator cover plate, the pole shoe can be matched with the open slot after the stator cover plate and the shell are directly butted during assembly, thereby improving the production efficiency of the motor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an exploded view of a stator assembly according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a stator assembly according to an embodiment of the present invention;
fig. 3 is a schematic view of a stator cover plate structure according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a stator core according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating a cooling principle of a stator core according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of a housing according to an embodiment of the present invention;
in the figure, 100 is a case, 200 is a stator cover plate, 300 is a stator core, 400 is a coil, 500 is a pole piece, 600 is a first cooling space, 700 is a second cooling space, 800 is a spoiler,
101 is an oil inlet cavity, 102 is an oil return cavity, 103 is an oil inlet, 104 is an oil outlet, 105 is an oil spray hole, 106 is an oil return hole, 201 is a groove rib, 202 is an iron core tooth groove, 301 is a tooth, and 302 is an open groove.
Detailed Description
The core of the invention is to provide a stator assembly and an axial magnetic field motor so as to improve the production efficiency of the motor.
The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1 to 6, a stator assembly according to an embodiment of the present invention includes:
the stator comprises a shell 100, a stator core 300, a coil 400, a pole shoe 500 and a stator cover plate 200, wherein the stator core 300, the coil 400 and the pole shoe 500 are arranged in a space surrounded by the shell 100 and the stator cover plate 200; the coil 400 is disposed in the open slot 302 of the stator core 300; the pole piece 500 is fixed on the stator cover plate 200, and when the stator cover plate 200 is butted with the casing 100, the pole piece 500 can be arranged at the notch of the open slot 302; a first cooling space 600 is defined by the outer ring of the stator core 300 and the housing 100, a second cooling space 700 is defined by the inner ring of the stator core 300 and the housing 100, and the first cooling space 600 is communicated with the second cooling space 700;
an oil inlet cavity 101 and an oil return cavity 102 are arranged on the shell wall of the shell 100, an oil inlet 103 and an oil outlet 104 are arranged on the outer wall of the shell 100, the oil inlet 103 is communicated with the oil inlet cavity 101, and the oil outlet 104 is communicated with the oil return cavity 102; an oil injection hole 105 and an oil return hole 106 are formed in the inner wall of the shell 100, the oil injection hole 105 is communicated with the first cooling space 600 and the oil inlet cavity 101, and the oil return hole 106 is communicated with the first cooling space 600 and the oil return cavity 102.
The stator core 300 of the present invention has the open slot 302, so as to facilitate the installation of the coil 400, and meanwhile, the pole shoe 500 is fixed on the stator cover plate 200, when the stator cover plate 200 is butted with the casing 100, the pole shoe 500 and the notch of the open slot 302 can relatively reduce the tooth harmonic of the motor, reduce the iron loss of the motor, improve the efficiency of the motor, and reduce the torque ripple of the motor. Since the pole shoe 500 is supported on the stator cover plate 200, the pole shoe 500 can be engaged with the open slot 302 after the stator cover plate 200 and the housing 100 are directly abutted during assembly, thereby improving the production efficiency of the motor.
When the stator assembly is adopted, cooling oil enters the oil inlet cavity 101 from the oil inlet 103 and enters the interior of the shell 100 through the oil injection hole 105, the cooling oil entering the interior of the shell 100 can be directly contacted with the stator core 300 arranged in the shell 100, and after contact heat exchange, the cooling oil enters the oil return cavity 102 through the oil return hole 106 and finally flows out of the oil outlet 104. Because the cooling oil can directly contact with the stator core 300 for heat exchange, the cooling efficiency of the motor is improved, and the service life of the motor is prolonged.
The stator cover 200 of the present invention is fixed to the casing 100 by screws, pressing plates, welding, riveting, or dovetails. The corresponding stator cover plate 200 and the shell 100 are provided with mounting holes for mounting screws, and stations for arranging a pressing plate, riveting holes and a dovetail structure are arranged to fix the stator cover plate 200 and the shell 100.
The stator core 300 has the open slots 302 and the teeth 301, wherein the open slots 302 are used for installing the coils 400, and the open slots 302 are arranged between each tooth, so that the installation of the coils 400 can be facilitated by arranging the open slots 302, wherein the coils 400 are formed coils or are sequentially wound on the teeth. The forming coil is a flat copper wire forming coil or a forming coil formed by pre-winding a round copper wire.
The stator cover 200 is generally made of a non-magnetic high-strength glass fiber composite or a high-strength plastic (e.g., PPS, PEEK, etc.). The end surface of the stator cover 200 near the stator core 300 is provided with a slot rib 201 extending in the radial direction of the stator cover 200 and a core slot 202 corresponding to the stator core 300. The alignment of the stator cover plate 200 and the housing 100 can be facilitated by providing the slot ribs 201 and the core slots 202. The number of the slot ribs 201 is the same as or different from the number of the open slots 302, and the number of the slot ribs 201 is equal to the number of the open slots 302 of the stator core 300, so that the alignment of the stator cover plate 200 and the housing 100 can be more convenient. Two sides of each slot rib 201 are provided with a pole shoe 500, the pole shoes 500 are adhered to two sides of the slot rib 201, and the residual part of the iron core tooth slot 202 is matched with the tooth surface of the whole iron core. The thickness of the cover plate in the core tooth groove portion needs to be as thin as possible to reduce the air gap between the stator and rotor.
One stator assembly has one housing, a plurality of stator assemblies can be coaxially arranged, and a plurality of housings 100 are coaxially arranged, that is: the end faces of the adjacent housings 100 are in abutment with each other.
In two adjacent housings 100, the oil outlet 104 of the previous housing 100 is communicated with the oil inlet 103 of the next housing 100. The communication can be realized in various ways, specifically, the connection can be realized through an external pipeline, or the oil inlet 103 of the previous housing 100 and the oil outlet 104 of the subsequent housing 100 are arranged coaxially. That is, the oil outlet 104 and the oil inlet 103 are both disposed on the end surface, and when the two housings 100 are butted, the oil outlet 104 and the oil inlet 103 are automatically conducted.
Taking two shells 100 as an example, the oil outlet 104 of one shell 100 is disposed on the end surface, the oil inlet 103 of the other shell 100 is disposed on the end surface, and when the two shells 100 are butted, the oil outlet 104 of the previous shell 100 is communicated with the oil inlet 103 of the next shell 100.
In the plurality of housings 100, the oil inlet 103 of the housing 100 at one end and the oil outlet 104 of the housing 100 at the other end may be located on an end surface of the corresponding housing 100, or may be located on a circumferential surface of the corresponding housing 100. Preferably, in order to facilitate installation of subsequent parts, in the embodiment of the present invention, the oil inlet 103 of the housing 100 at one end and the oil outlet 104 of the housing 100 at the other end are both disposed on the circumferential surface of the housing 100, and further, the oil inlet 103 of the housing 100 at one end and the oil outlet 104 of the housing 100 at the other end are both disposed on the same side.
In one embodiment of the present invention, the pole piece 500 extends along the length direction of the stator cover plate 200, and the length of the pole piece 500 is the same as the length of the slot opening of the open slot 302 in the radial direction of the stator cover plate 200.
In one embodiment of the present invention, the sum of the widths of the slot ribs 201 and the pole pieces 500 located at both sides of the slot ribs 201 is identical to the width of the slot opening of the open slot 302.
The pole piece 500 is molded from SMC ferromagnetic powder or other magnetically conductive powder (e.g., ferrite powder) and has a rectangular outer profile.
The invention also discloses an axial magnetic field motor which comprises the stator assembly. Because above-mentioned stator module has above beneficial effect, including above-mentioned stator module's axial magnetic field motor also has corresponding effect, and this place is no longer repeated.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A stator assembly comprises a shell, a stator core, a coil, a pole shoe and a stator cover plate, wherein the stator core, the coil and the pole shoe are arranged in a space enclosed by the shell and the stator cover plate; the coil is arranged in an open slot of the stator core, and the pole shoe is fixed on the stator cover plate and can be arranged at the notch of the open slot when the stator cover plate is butted with the shell; a first cooling space is defined by the outer circular ring of the stator core and the shell, a second cooling space is defined by the inner circular ring of the stator core and the shell, and the first cooling space is communicated with the second cooling space;
an oil inlet cavity and an oil return cavity are formed in the wall of the shell, an oil inlet and an oil outlet are formed in the outer wall of the shell, the oil inlet is communicated with the oil inlet cavity, and the oil outlet is communicated with the oil return cavity; the oil injection hole and the oil return hole are formed in the inner wall of the shell, the oil injection hole is communicated with the first cooling space and the oil inlet cavity, and the oil return hole is communicated with the first cooling space and the oil return cavity.
2. The stator assembly of claim 1 wherein the stator cover plate is secured to the housing by screws, clamps, welding, rivets or dovetails.
3. The stator assembly of claim 2, wherein the end surface of the stator cover plate near the stator core is provided with a slot rib extending along a radial direction of the stator cover plate and a core slot corresponding to the stator core.
4. The stator assembly of claim 3 wherein the number of slot ribs is equal to the number of open slots of the stator core, one pole shoe being disposed on each side of each slot rib.
5. The stator assembly of claim 3, wherein the pole pieces extend along a length of the stator cover plate, the pole pieces having a length in a radial direction of the stator cover plate that is the same as a length of the slots of the open slots.
6. The stator assembly of claim 3, wherein a sum of widths of the slot ribs and the pole shoes on both sides of the slot ribs coincides with a width of the slots of the open slots.
7. The stator assembly of claim 6, wherein the pole pieces are machined from SMC.
8. The stator assembly of claim 1 wherein the stator cover plate is machined from a non-magnetically permeable high strength fiberglass composite or a high strength plastic.
9. The stator assembly of claim 1, wherein the coils are shaped coils.
10. An axial field machine comprising a stator assembly according to any of claims 1 to 9.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910208603.3A CN111725907A (en) | 2019-03-19 | 2019-03-19 | Stator module and axial magnetic field motor |
| PCT/CN2019/129106 WO2020147551A1 (en) | 2019-01-14 | 2019-12-27 | Cooling system, stator assembly, and axial magnetic field motor |
| EP19910377.1A EP3913777A4 (en) | 2019-01-14 | 2019-12-27 | Cooling system, stator assembly, and axial magnetic field motor |
| US17/422,424 US11942828B2 (en) | 2019-01-14 | 2019-12-27 | Cooling system, stator assembly, and axial magnetic field motor |
| US18/400,968 US20240235298A9 (en) | 2019-01-14 | 2023-12-29 | Cooling system, stator assembly, and axial magnetic field motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910208603.3A CN111725907A (en) | 2019-03-19 | 2019-03-19 | Stator module and axial magnetic field motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111725907A true CN111725907A (en) | 2020-09-29 |
Family
ID=72562151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910208603.3A Pending CN111725907A (en) | 2019-01-14 | 2019-03-19 | Stator module and axial magnetic field motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111725907A (en) |
-
2019
- 2019-03-19 CN CN201910208603.3A patent/CN111725907A/en active Pending
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