CN115498840A - Axial flux motor direct cooling system and manufacturing method of stator core thereof - Google Patents
Axial flux motor direct cooling system and manufacturing method of stator core thereof Download PDFInfo
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- CN115498840A CN115498840A CN202210984096.4A CN202210984096A CN115498840A CN 115498840 A CN115498840 A CN 115498840A CN 202210984096 A CN202210984096 A CN 202210984096A CN 115498840 A CN115498840 A CN 115498840A
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- stator
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- cooling liquid
- stator core
- inner ring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a direct cooling system of an axial flux motor and a manufacturing method of a stator core of the direct cooling system, and belongs to the field of motors. The problem of traditional motor can't directly cool off and dispel the heat uneven stator core and stator winding is solved. A direct cooling system of an axial flux motor comprises a shell outer ring, a motor stator and winding assembly, a shell inner ring and a stator clamping plate assembly, wherein the motor stator and the winding assembly are arranged between the shell outer ring and the shell inner ring, and each stator clamping plate is connected with the shell outer ring and the shell inner ring on the corresponding side; the motor stator and winding assembly comprises a stator core and stator teeth, each protrusion is correspondingly provided with one stator tooth, each stator clamping plate and the end face of the stator core, the protrusion on the stator core, the outer ring of the machine shell and the inner ring of the machine shell on the corresponding side are enclosed to form a cooling channel, and the top and the bottom of the stator core are respectively provided with a cooling liquid inlet and a cooling liquid outlet which are communicated with the cooling channel. The cooling device is mainly used for cooling the axial flux motor.
Description
Technical Field
The invention belongs to the field of motors, and particularly relates to a direct cooling system of an axial flux motor and a manufacturing method of a stator core of the direct cooling system.
Background
With the rapid development of new energy automobile technology, the performance requirement on the automobile driving motor is higher and higher, the increase of the performance inevitably leads to the increase of the volume of the driving motor, but the axial space size of the new energy automobile is very limited, and the contradiction between the performance and the volume of the driving motor is increasingly prominent;
compared with the traditional radial magnetic field motor, the axial magnetic field motor has the advantages of short axial size, large torque density, high power density, light weight, high efficiency and capability of being controlled by the radial magnetic field motor, and is more suitable for the vehicle driving motor of a new energy vehicle because the axial magnetic field motor adopts the axial magnetic field design;
the improvement of the power density and the torque density of the axial flux motor brings the problems of high load, high heat generation and the like of the motor, so that the problem of heat dissipation and cooling of the axial flux motor is solved, and the problem of improving the reliability of the axial flux motor is one of important problems, and therefore, the design of the motor which directly cools a stator core and a stator winding and improves the heat dissipation uniformity is a problem to be solved urgently.
Disclosure of Invention
In view of this, the present invention provides a direct cooling system for an axial flux motor and a method for manufacturing a stator core thereof, so as to solve the problem that the conventional motor cannot directly cool the stator core and a stator winding and has uneven heat dissipation.
In order to achieve the above object, according to one aspect of the present invention, there is provided a direct cooling system for an axial flux motor, including an outer casing, a motor stator and winding assembly, an inner casing, and a stator clamp plate assembly, where the motor stator and winding assembly is disposed between the outer casing and the inner casing, the stator clamp plate assembly includes two stator clamp plates, the two stator clamp plates are symmetrically disposed on front and rear sides of the motor stator and winding assembly, and each stator clamp plate is connected to the outer casing and the inner casing on the corresponding side; the motor stator and winding assembly comprises a stator core and stator teeth, two groups of bulges are symmetrically arranged on the front side and the rear side of the stator core, a plurality of bulges in each group of bulges are arranged on the end surface of the stator core on the corresponding side in a circumferentially and uniformly distributed mode, each bulge is correspondingly provided with one stator tooth, two stator clamping plates are arranged on the front side and the rear side of the stator core, a plurality of positioning grooves which are in one-to-one correspondence with the bulges of the stator core are arranged on each stator clamping plate in a circumferentially and uniformly distributed mode, each bulge is clamped in the positioning groove at the corresponding position, each stator clamping plate, the end surface of the stator core on the corresponding side, the bulges on the stator core, the outer ring of a machine shell and the inner ring of the machine shell are enclosed to form a cooling channel, and the top and the bottom of the stator core are respectively provided with a cooling liquid inlet and a cooling liquid outlet which are communicated with the cooling channel.
Furthermore, the motor stator and winding assembly further comprises a plurality of stator windings, and the plurality of stator windings are sleeved on each stator tooth in a one-to-one correspondence manner.
Furthermore, the stator winding is an integrated integral winding.
Furthermore, any two adjacent stator windings are taken as a starting point and an end point, and the two stator windings arranged at intervals are connected through a bus bar.
Further, lead wires are provided on the stator winding at a start position, an end position, and a position immediately before the end position.
Furthermore, the stator clamping plate is an insulating and magnetic insulating stator clamping plate.
Furthermore, the cooling channel comprises an inner ring cooling liquid connecting channel, a radial cooling liquid channel and an outer ring cooling liquid connecting channel, each inner ring cooling liquid connecting channel is communicated with the corresponding radial cooling liquid channel, and each radial cooling liquid channel is communicated with the corresponding outer ring cooling liquid connecting channel.
According to another aspect of the present invention, there is provided a method of producing the above-described stator core, comprising the steps of:
s1, punching and removing two sides of a thin silicon steel sheet and then winding; punching inner ring rectangular holes at intervals of 1/6 times of the winding circumference while winding, forming an annular body after winding for a certain time, and forming corresponding inner ring cooling liquid connecting flow passages by a plurality of overlapped inner ring rectangular holes in the same radial direction;
s2, continuously winding, punching teeth and middle rectangular holes at equal intervals at intervals of 1/24 times of the winding circumference on the thin silicon steel sheet, forming corresponding stator teeth by a plurality of overlapped teeth in each same radial direction after winding for a certain time, and forming corresponding radial cooling liquid flow passages by a plurality of overlapped middle rectangular holes in each same radial direction;
s3, continuously winding and punching outer ring rectangular holes at intervals of 1/6 times of winding circumference on the thin silicon steel sheet, and forming outer ring cooling liquid connecting flow channels at corresponding positions by the outer ring rectangular holes which are overlapped in the same radial direction after winding for a certain time;
and S4, continuously winding and alternately punching cooling liquid inlet rectangular holes and cooling liquid outlet rectangular holes at intervals of 1/2 times of winding perimeter on the thin silicon steel sheet, forming cooling liquid inlets by a plurality of overlapped cooling liquid inlet rectangular holes after winding, and forming cooling liquid outlets by a plurality of overlapped cooling liquid outlet rectangular holes.
Compared with the prior art, the invention has the beneficial effects that:
1. the stator clamping plate, the end face of the stator core on the corresponding side, the protrusion on the stator core, the outer ring of the machine shell and the inner ring of the machine shell are enclosed to form a cooling channel, and the stator core and the winding can be directly cooled through the cooling channel, so that the heat dissipation efficiency is improved;
2. the size of the motor is reduced, the space is saved, and the integral design requirement of the new energy automobile can be better met by a direct cooling mode of the cooling channel;
3. because the cooling liquid in the cooling channel forms a continuous reversing and circulating state under the blocking of the stator teeth, the inner ring of the machine shell and the outer ring of the machine shell, each stator tooth can be well radiated, and the radiation uniformity is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
fig. 1 is a schematic cross-sectional structural view of a direct cooling system of an axial flux motor according to the present invention;
FIG. 2 is a schematic view of a motor stator and winding assembly according to the present invention;
FIG. 3 is a schematic view of the shape and structure of the cooling channel according to the present invention;
FIG. 4 is a schematic view of a stator tooth according to the present invention;
fig. 5 is a schematic view of a stator core according to the present invention;
FIG. 6 is a schematic view of a connection structure of the stator winding, the bus bar and the outgoing line according to the present invention;
FIG. 7 is a schematic view of a stator clamping plate according to the present invention;
FIG. 8 is a schematic structural view of a thin silicon steel sheet according to the present invention;
FIG. 9 is a schematic view of a punching position structure of the inner ring rectangular hole according to the present invention;
FIG. 10 is a schematic view of the tooth and intermediate rectangular hole punching position configuration of the present invention;
FIG. 11 is a schematic diagram of the punching position structure of the outer ring rectangular hole according to the present invention;
fig. 12 is a schematic view of the punching position structure of the cooling fluid inlet rectangular hole and the cooling fluid outlet rectangular hole according to the present invention.
A housing outer ring 1; a motor stator and winding assembly 2; a stator clamping plate assembly 3; a housing inner ring 4; a stator core 5; a stator winding 6; stator teeth 7; a bus bar 8; an outgoing line 9; a stator clamping plate 10; an inner ring rectangular hole 35; the teeth 36; a central rectangular aperture 37; an outer-ring rectangular hole 38; a coolant inlet rectangular hole 39; a coolant outlet rectangular aperture 40; a coolant inlet 41; the inner ring coolant connection flow passage 42; the radial coolant flow passage 43; the outer ring coolant connection flow passage 44; a coolant outlet 45.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.
Referring to the accompanying drawings for illustrating the embodiment, according to one aspect of the present invention, there is provided an axial flux motor direct cooling system, including a casing outer ring 1, a motor stator and winding assembly 2, a casing inner ring 4 and a stator clamping plate assembly 3, wherein the motor stator and winding assembly 2 is arranged between the casing outer ring 1 and the casing inner ring 4, the stator clamping plate assembly 3 includes two stator clamping plates 10, the two stator clamping plates 10 are symmetrically arranged at the front and rear sides of the motor stator and winding assembly 2, and each stator clamping plate 10 is connected to the casing outer ring 1 and the casing inner ring 4 at the corresponding side; the motor stator and winding assembly 2 comprises a stator core 5 and stator teeth 7, two groups of protrusions are symmetrically arranged on the front side and the rear side of the stator core 5, a plurality of protrusions in each group of protrusions are arranged on the end face of the stator core 5 on the corresponding side in a circumferentially and uniformly distributed mode, one stator tooth 7 is correspondingly arranged on each protrusion, two stator clamping plates 10 are arranged on the front side and the rear side of the stator core 5, a plurality of positioning grooves which correspond to the protrusions of the stator core 5 one by one are uniformly distributed on the circumference of each stator clamping plate 10 in a penetrating mode, each protrusion is clamped in the positioning groove in the corresponding position, each stator clamping plate 10, the end face of the stator core 5 on the corresponding side, the protrusions on the stator core 5, a housing outer ring 1 and a housing inner ring 4 are enclosed to form a cooling channel, and the top and the bottom of the stator core 5 are respectively provided with a cooling liquid inlet 41 and a cooling liquid outlet 45 which are communicated with the cooling channel.
In this embodiment, the motor stator and winding assembly 2 further includes a plurality of stator windings 6, and the plurality of stator windings 6 are sleeved on each stator tooth 7 in a one-to-one correspondence manner.
In this embodiment, the stator winding 6 is an integrated integral winding.
In the present embodiment, two stator windings 6 disposed at intervals are connected by one bus bar 8 with any adjacent two stator windings 6 as a start point and an end point.
In the present embodiment, the lead wires 9 are provided on the stator winding 6 at the start position, the end position, and the position immediately before the end position.
In this embodiment, the stator clamping plate 10 is an insulating and magnetic insulating stator clamping plate, and the material may specifically be PEEK material, PC material, acryl material, or bakelite plate.
In the present embodiment, the cooling channel includes an inner ring cooling liquid connecting flow passage 42, a radial cooling liquid flow passage 43, and an outer ring cooling liquid connecting flow passage 44, each inner ring cooling liquid connecting flow passage 42 is communicated with the corresponding radial cooling liquid flow passage 43, and each radial cooling liquid flow passage 43 is communicated with the corresponding outer ring cooling liquid connecting flow passage 44.
According to another aspect of the present invention, there is provided a method of producing the above-described stator core, comprising the steps of:
s1, punching and removing two sides of a thin silicon steel sheet and then winding; punching the inner ring rectangular holes 35 at intervals of 1/6 times of the winding circumference while winding, forming an annular body after winding for a certain time, and forming corresponding inner ring cooling liquid connecting flow channels 42 by the multiple overlapped inner ring rectangular holes 35 in the same radial direction;
s2, continuously winding, punching teeth 36 and middle rectangular holes 37 at equal intervals at intervals of 1/24 times of the winding circumference on the thin silicon steel sheet, forming corresponding stator teeth 7 by a plurality of overlapped teeth 36 in each same radial direction after winding for a certain time, and forming corresponding radial cooling liquid flow channels 43 by a plurality of overlapped middle rectangular holes 37 in each same radial direction;
s3, continuously winding and punching outer ring rectangular holes 38 at intervals of 1/6 times of winding circumference on the thin silicon steel sheet, and forming outer ring cooling liquid connecting flow channels 44 at corresponding positions by the outer ring rectangular holes 38 overlapped in the same radial direction after winding for a certain time;
and S4, continuously winding and alternately punching cooling liquid inlet rectangular holes 39 and cooling liquid outlet rectangular holes 40 on the thin silicon steel sheet at intervals of 1/2 times of winding perimeter, wherein a plurality of overlapped cooling liquid inlet rectangular holes 39 form cooling liquid inlets 41 after winding, and a plurality of overlapped cooling liquid outlet rectangular holes 40 form cooling liquid outlets 45.
When the cooling device is used, cooling liquid enters from the cooling liquid inlet 41 and is divided through the stator core 5, and respectively enters into the cooling channels where the front end face and the rear end face of the stator core 5 are located, then when the cooling liquid flows in the corresponding cooling channels, the cooling liquid firstly contacts with the stator teeth 7 which are right opposite to the cooling liquid inlet 41 and then is divided at the stator teeth 7, and respectively flows to two sides of the stator teeth 7 in the dividing process, the cooling liquid flows from the inner ring cooling liquid connecting channel 42 at the corresponding position to the radial cooling liquid channel 43 at the corresponding position after meeting the adjacent stator teeth 7 and the shell inner ring 4 in the flowing process, the cooling liquid flows from the radial cooling liquid channel 43 to the outer ring cooling liquid connecting channel 44 at the corresponding position and then continues to the radial cooling liquid channel 43 at the next position, the traveling path is S-shaped, the cooling liquid is collected to the cooling liquid inlet 41 and discharged after the flowing is continuously reversed and the flowing process is repeated, and the cooling liquid flows back and forth in the cooling channels, and the cooling liquid can fully contact with the cooling space of the stator core 5, and the cooling teeth.
The embodiments of the invention disclosed above are intended to be merely illustrative. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention.
Claims (8)
1. The utility model provides an axial flux machine direct cooling system which characterized in that: the motor stator and winding assembly comprises a housing outer ring (1), a motor stator and winding assembly (2), a housing inner ring (4) and a stator clamping plate assembly (3), wherein the motor stator and winding assembly (2) is arranged between the housing outer ring (1) and the housing inner ring (4), the stator clamping plate assembly (3) comprises two stator clamping plates (10), the two stator clamping plates (10) are symmetrically arranged on the front side and the rear side of the motor stator and winding assembly (2), and each stator clamping plate (10) is connected with the housing outer ring (1) and the housing inner ring (4) on the corresponding side; the motor stator and winding assembly (2) comprises a stator core (5) and stator teeth (7), two groups of protrusions are symmetrically arranged on the front side and the rear side of the stator core (5), a plurality of protrusions in each group of protrusions are arranged on the end face of the stator core (5) on the corresponding side in a circumferential uniform distribution mode, one stator tooth (7) is correspondingly arranged on each protrusion, two stator clamping plates (10) are arranged on the front side and the rear side of the stator core (5), a plurality of positioning grooves which correspond to the protrusions of the stator core (5) in a one-to-one mode are uniformly distributed on the circumferences of the stator clamping plates (10), each protrusion is clamped in the positioning groove in the corresponding position, each stator clamping plate (10) and the end face of the stator core (5) on the corresponding side, the protrusions on the stator core (5), a casing outer ring (1) and a casing inner ring (4) are enclosed to form a cooling channel, and the top and the bottom of the stator core (5) are respectively provided with a cooling liquid inlet (41) and a cooling liquid outlet (45) which are communicated with the cooling channel.
2. The direct cooling system for an axial flux electric machine of claim 1, wherein: the motor stator and winding assembly (2) further comprises a plurality of stator windings (6), and the plurality of stator windings (6) are sleeved on each stator tooth (7) in a one-to-one correspondence mode.
3. The direct cooling system for an axial flux electric machine of claim 2, wherein: the stator winding (6) is an integrated integral winding.
4. The direct cooling system for an axial flux electric machine of claim 2, wherein: two stator windings (6) arranged at intervals are connected through a bus bar (8) by taking any two adjacent stator windings (6) as a starting point and an end point.
5. The direct cooling system for an axial flux electric machine of claim 4, wherein: and leading-out wires (9) are arranged on the stator winding (6) at the starting position, the end position and the position before the end position.
6. The direct cooling system for an axial flux electric machine of claim 1, wherein: the stator clamping plate (10) is an insulating and magnetic-insulating stator clamping plate.
7. The direct cooling system for an axial flux electric machine of claim 1, wherein: the cooling channel comprises an inner ring cooling liquid connecting flow channel (42), a radial cooling liquid flow channel (43) and an outer ring cooling liquid connecting flow channel (44), wherein each inner ring cooling liquid connecting flow channel (42) is communicated with the radial cooling liquid flow channel (43) at the corresponding position, and each radial cooling liquid flow channel (43) is communicated with the outer ring cooling liquid connecting flow channel (44) at the corresponding position.
8. A method of manufacturing a stator core according to any one of claims 1-7, characterized in that: the method comprises the following steps:
s1, punching and removing two sides of a thin silicon steel sheet and then winding; punching inner ring rectangular holes (35) at intervals of 1/6 times of the winding circumference while winding, forming an annular body after winding for a certain time, and forming corresponding inner ring cooling liquid connecting flow channels (42) through a plurality of overlapped inner ring rectangular holes (35) in the same radial direction;
s2, continuously winding, punching teeth (36) and middle rectangular holes (37) at equal intervals at intervals of 1/24 times of the winding circumference on the thin silicon steel sheet, forming corresponding stator teeth (7) by a plurality of overlapped teeth (36) in the same radial direction after winding for a certain time, and forming corresponding radial cooling liquid flow passages (43) by a plurality of overlapped middle rectangular holes (37) in the same radial direction;
s3, continuously winding, punching outer ring rectangular holes (38) at intervals of 1/6 times of winding circumference on the thin silicon steel sheet, and forming outer ring cooling liquid connecting flow channels (44) at corresponding positions by the outer ring rectangular holes (38) overlapped in the same radial direction after winding for a certain time;
and S4, continuously winding and alternately punching cooling liquid inlet rectangular holes (39) and cooling liquid outlet rectangular holes (40) on the thin silicon steel sheet at intervals of 1/2 times of the winding perimeter, wherein a plurality of overlapped cooling liquid inlet rectangular holes (39) form cooling liquid inlets (41) after winding, and a plurality of overlapped cooling liquid outlet rectangular holes (40) form cooling liquid outlets (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210984096.4A CN115498840A (en) | 2022-08-17 | 2022-08-17 | Axial flux motor direct cooling system and manufacturing method of stator core thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210984096.4A CN115498840A (en) | 2022-08-17 | 2022-08-17 | Axial flux motor direct cooling system and manufacturing method of stator core thereof |
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| Publication Number | Publication Date |
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| CN115498840A true CN115498840A (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210984096.4A Pending CN115498840A (en) | 2022-08-17 | 2022-08-17 | Axial flux motor direct cooling system and manufacturing method of stator core thereof |
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| CN (1) | CN115498840A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115940450A (en) * | 2022-12-27 | 2023-04-07 | 沈阳工业大学 | Permanent magnet motor composite stator water cooling structure |
-
2022
- 2022-08-17 CN CN202210984096.4A patent/CN115498840A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115940450A (en) * | 2022-12-27 | 2023-04-07 | 沈阳工业大学 | Permanent magnet motor composite stator water cooling structure |
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