CN114374281A - Stator punching sheet structure of low-noise oil-cooled flat wire motor - Google Patents
Stator punching sheet structure of low-noise oil-cooled flat wire motor Download PDFInfo
- Publication number
- CN114374281A CN114374281A CN202210088434.6A CN202210088434A CN114374281A CN 114374281 A CN114374281 A CN 114374281A CN 202210088434 A CN202210088434 A CN 202210088434A CN 114374281 A CN114374281 A CN 114374281A
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- China
- Prior art keywords
- stator
- oil
- flat wire
- holes
- tooth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004080 punching Methods 0.000 title claims abstract description 31
- 238000004804 winding Methods 0.000 claims abstract description 18
- 238000009413 insulation Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a stator punching sheet structure of a low-noise oil-cooled flat wire motor, which comprises a stator punching sheet body, wherein a plurality of stator teeth are circumferentially distributed on the stator punching sheet body at equal intervals, and a stator groove is arranged between every two adjacent stator teeth, and is characterized in that: each stator tooth is provided with a pair of oil through holes, and the oil through holes are symmetrically distributed around the center line of the stator tooth. The cold flat wire stator punching sheet is provided with the oil through holes, the oil through holes are located on two sides of the root of each wider stator tooth (the part close to the circle center of the stator punching sheet is the top of each stator tooth, and the part far away from the circle center of the stator punching sheet is the root of each stator tooth), and the oil through holes are not located on the center line of each stator tooth, so that the oil through holes cannot influence the circulation of a magnetic field and cannot influence the torque output of a motor. In addition, the plurality of bosses are additionally arranged on the stator teeth, so that the strength of the stator teeth can be increased, the stress deformation of the tooth part is improved, and the vibration noise of the motor is favorably improved. And the utilization rate of the stator slot can be increased, and the heat dissipation of the winding is facilitated.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a stator punching sheet structure of a low-noise oil-cooled flat wire motor.
Background
In the prior art, a rectangular conductor is adopted by a flat wire motor, and a stator slot is a parallel slot, so that the stator tooth is in a trapezoidal shape, the tooth width close to a notch is the minimum, and the tooth width close to the slot bottom is the maximum. When the motor works, a magnetic field enters the stator teeth from the air gap, and when the magnetic field passes through the narrowest part of the stator teeth and passes through the wider stator tooth root part, the magnetic density is reduced, the tooth width is excessive, and the utilization rate of the tooth part is reduced.
Chinese patent CN110808645A discloses a cooling structure applied to an oil-cooled flat-wire motor stator, wherein an oil through hole is provided between the outer diameter ends of two adjacent winding notches on the stator core. As shown in fig. 1, the above patent proposes that an oil hole is provided between the outer diameter ends of two adjacent winding notches, the oil hole is located on the center line of the stator tooth portion, and a certain area is also occupied at the yoke portion of the stator, which affects the trend of magnetic lines of force, weakens the circulation of the magnetic field, affects the output of the motor torque, and reduces the torque of the motor.
Disclosure of Invention
The stator punching sheet structure of the low-noise oil-cooled flat wire motor is provided aiming at the defects in the prior art, and the problems that the position of an oil through hole influences the circulation of a magnetic field and the torque output of the motor are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a stator punching sheet structure of low noise oil-cooling flat wire motor, includes the stator towards the piece body, a plurality of stator tooth has been laid to circumference equidistant on the stator towards the piece body, is equipped with stator slot, its characterized in that between two adjacent stator teeth: each stator tooth is provided with a pair of oil through holes, and the oil through holes are symmetrically distributed around the center line of the stator tooth.
According to the technical scheme, the oil through hole comprises a first edge adjacent to another oil through hole, a second edge adjacent to the stator slot and a third edge positioned on the extension line of the bottom side line of the stator slot, the first edges of the two adjacent oil through holes are arranged in parallel, and the second edge of the oil through hole is arranged in parallel with the outer side line of the stator slot.
According to the technical scheme, the distance between the first edges of the two oil through holes on the same stator tooth is equal to the minimum distance between the tops of the stator teeth; the distance between the second side of any oil through hole and the outer side line of the stator slot is L2L is within the range of 0.5mm ≤ L2≤1mm。
According to the technical scheme, the connecting ends of the first edge, the second edge and the third edge are subjected to rounding treatment, and the rounding angle R1The value range of R is more than or equal to 0.3mm1≤0.5mm。
According to the technical scheme, a plurality of bosses are additionally arranged on the two side wires of the stator teeth respectively, the bosses are symmetrically distributed on the center line of the tooth part, and the bosses are positioned between two connected flat wire windings.
According to the technical scheme, the radius of the boss is R3，R3The value range of R is more than or equal to 0.3mm3≤0.8mm。
According to the technical scheme, the radius of a first chamfer of a flat wire winding placed in a stator slot is R2, the radius of a second chamfer at the joint of a stator tooth and a boss is R2, and the value range of R2 is more than or equal to 0.3mm and less than or equal to R2≤0.8mm。
According to the technical scheme, insulation slot paper is placed in the stator slots, the insulation slot paper is S-shaped, and adjacent flat wire windings are spaced.
The invention has the following beneficial effects:
1. the stator punching sheet is provided with the oil through holes, the oil through holes are positioned on two sides of the root of each wider stator tooth (the part close to the circle center of the stator punching sheet is the top of each stator tooth, and the part far away from the circle center of the stator punching sheet is the root of each stator tooth), and the oil through holes are not positioned on the center line of the stator teeth, so that the oil through holes cannot influence the circulation of a magnetic field and cannot influence the torque output of a motor.
2. A pair of oil through holes are distributed on the stator teeth, so that the width of the tooth root part is the same as that of the tooth top part, the problem of reduction of magnetic density caused by excessive tooth width of the stator teeth is avoided, and the utilization rate of the stator teeth is improved.
2. According to the arrangement of the flat wire winding on the stator teeth, a plurality of bosses are added, the strength of the stator teeth is increased, the stress deformation of the tooth part can be improved, and the vibration noise of the motor is improved. The utilization rate of the stator slot is improved, and the winding heat dissipation is facilitated.
3. S-shaped slot paper is placed in the stator slot, slot insulation between the flat wire conductor and the stator iron core, and interlayer insulation and phase insulation between the conductors are achieved, and safety performance of the motor is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration;
fig. 2 is a schematic structural diagram of a stator punching sheet according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a stator punching structure according to an embodiment of the present invention;
FIG. 4 is a detail view of the oil passage hole of the present invention;
FIG. 5 is a detail view of a tooth boss of the present invention;
in the figure, 1, a stator punching sheet body; 2. stator teeth; 3. a stator slot; 3-1, first chamfering; 3-2, second chamfer angle; 4. an oil through hole; 4-1, a first side; 4-2, a second edge; 4-3, third side; 5. a flat wire winding; 6. a boss; 7. insulating slot paper; A. a stator tooth centerline; B. the outer edge line of the stator teeth.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1-2, the stator punching structure of the low-noise oil-cooled flat wire motor provided by the invention comprises a stator punching body 1, wherein a plurality of stator teeth 2 are circumferentially distributed on the stator punching body at equal intervals, and a stator groove 3 is arranged between every two adjacent stator teeth. Each stator tooth is provided with a pair of oil through holes 4 which are symmetrically distributed around the center line A of the stator tooth. This embodiment makes the oil through hole not on the central line of stator tooth through the arrangement mode that changes the oil through hole for the oil through hole can not influence the circulation in magnetic field, can not influence the moment of torsion output of motor.
According to the technical scheme, the oil through hole comprises a first side 4-1 adjacent to another oil through hole, a second side 4-2 adjacent to the stator slot and a third side 4-3 positioned on the extension line of the bottom side line of the stator slot, the first sides of the two adjacent oil through holes are arranged in parallel, and the second sides of the oil through holes are arranged in parallel with the outer side line of the stator slot.
According to the technical scheme, the distance between the first edges of the two oil through holes on the same stator tooth is equal to the minimum distance between the tops of the stator teeth; the distance between the second side of any oil through hole and the outer side line of the stator slot is L2L is within the range of 0.5mm ≤ L2≤1mm。
According to the technical scheme, the connecting ends of the first edge, the second edge and the third edge are subjected to rounding treatment, and the rounding angle R1The value range of R is more than or equal to 0.3mm1≤0.5mm。
According to the technical scheme, a plurality of layers of flat wire windings 5 are placed in the stator slots, a plurality of bosses 6 are additionally arranged on the wires on the two sides of the stator teeth respectively, the bosses are symmetrically distributed in the manner that the center lines of the teeth are symmetrical, and the bosses are positioned between the two connected flat wire windings 5.
According to the technical scheme, the radius of the boss is R3，R3The value range of R is more than or equal to 0.3mm3≤0.8mm。
According to the technical scheme, the radius of a first chamfer 3-1 of a flat wire winding 5 arranged in a stator slot is R2, the radius of a second chamfer 3-2 at the joint of a stator tooth and a boss is R2, and the value range of R2 is more than or equal to 0.3mm and less than or equal to R2≤0.8mm。
According to the technical scheme, insulation slot paper 7 is placed in the stator slots, the insulation slot paper is S-shaped, and adjacent flat wire windings are spaced.
The working principle of the invention is as follows:
1. the stator punching sheet is provided with the oil through holes, the oil through holes are positioned on two sides of the root of each wider stator tooth (the part close to the circle center of the stator punching sheet is the top of each stator tooth, and the part far away from the circle center of the stator punching sheet is the root of each stator tooth), and the oil through holes are not positioned on the center line of the stator teeth, so that the oil through holes cannot influence the circulation of a magnetic field and cannot influence the torque output of a motor.
2. A pair of oil through holes are distributed on the stator teeth, so that the width of the tooth root part is the same as that of the tooth top part, the problem of reduction of magnetic density caused by excessive tooth width of the stator teeth is avoided, and the utilization rate of the stator teeth is improved.
2. According to the arrangement of the flat wire winding on the stator teeth, a plurality of bosses are added, the strength of the stator teeth is increased, the stress deformation of the tooth part can be improved, and the vibration noise of the motor is improved. The utilization rate of the stator slot is improved, and the winding heat dissipation is facilitated.
3. S-shaped slot paper is placed in the stator slot, slot insulation between the flat wire conductor and the stator iron core, and interlayer insulation and phase insulation between the conductors are achieved, and safety performance of the motor is improved.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (8)
1. The utility model provides a stator punching sheet structure of low noise oil-cooling flat wire motor, includes the stator towards the piece body, a plurality of stator tooth has been laid to circumference equidistant on the stator towards the piece body, is equipped with stator slot, its characterized in that between two adjacent stator teeth: each stator tooth is provided with a pair of oil through holes, and the oil through holes are symmetrically distributed around the center line of the stator tooth.
2. The stator punching structure of the low-noise oil-cooled flat wire motor according to claim 1, characterized in that: the oil through holes comprise a first side adjacent to another oil through hole, a second side adjacent to the stator slot and a third side located on the extension line of the bottom side line of the stator slot, the first sides of the two adjacent oil through holes are arranged in parallel, and the second sides of the oil through holes are arranged in parallel with the outer side line of the stator slot.
3. According to the rightThe stator punching structure of the low-noise oil-cooled flat wire motor according to claim 2, characterized in that: the distance between the first edges of the two oil through holes on the same stator tooth is equal to the minimum distance between the tops of the stator teeth; the distance between the second side of any oil through hole and the outer side line of the stator slot is L2L is within the range of 0.5mm ≤ L2≤1mm。
4. The stator punching structure of the low-noise oil-cooled flat wire motor according to claim 2 or 3, characterized in that: rounding the connecting ends of the first edge, the second edge and the third edge, wherein the round corners R are rounded1The value range of R is more than or equal to 0.3mm1≤0.5mm。
5. The stator punching structure of the low-noise oil-cooled flat wire motor according to claim 2 or 3, characterized in that: and a plurality of bosses are respectively arranged on the two side wires of the stator teeth, the bosses are symmetrically distributed on the center line of the tooth part, and the bosses are positioned between the two connected flat wire windings.
6. The stator punching structure of the low-noise oil-cooled flat wire motor according to claim 5, characterized in that: the radius of the boss is R3，R3The value range of R is more than or equal to 0.3mm3≤0.8mm。
7. The stator punching structure of the low-noise oil-cooled flat wire motor according to claim 5, characterized in that: the radius of a first chamfer of a flat wire winding placed in a stator slot is R2The radius of the second chamfer at the joint of the stator teeth and the boss is also R2，R2The value range of R is more than or equal to 0.3mm2≤0.8mm。
8. The stator punching structure of the low-noise oil-cooled flat wire motor according to claim 5, characterized in that: insulation slot paper is placed in the stator slots, the shape of the insulation slot paper is S-shaped, and adjacent flat wire windings are spaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210088434.6A CN114374281B (en) | 2022-01-25 | 2022-01-25 | Stator punching structure of low-noise oil-cooled flat wire motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210088434.6A CN114374281B (en) | 2022-01-25 | 2022-01-25 | Stator punching structure of low-noise oil-cooled flat wire motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114374281A true CN114374281A (en) | 2022-04-19 |
| CN114374281B CN114374281B (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210088434.6A Active CN114374281B (en) | 2022-01-25 | 2022-01-25 | Stator punching structure of low-noise oil-cooled flat wire motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115296452A (en) * | 2022-08-22 | 2022-11-04 | 武汉理工通宇新源动力有限公司 | A stator punching structure of a low-loss oil-cooled flat wire motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001354A (en) * | 2012-10-29 | 2013-03-27 | 无锡金阳电机有限公司 | Motor with magnetic rotor |
| CN207475301U (en) * | 2016-08-17 | 2018-06-08 | 源捷公司 | Electromotor cooling system |
| CN213402600U (en) * | 2020-11-26 | 2021-06-08 | 长城汽车股份有限公司 | Cooling structure of stator core and oil-cooled motor |
-
2022
- 2022-01-25 CN CN202210088434.6A patent/CN114374281B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001354A (en) * | 2012-10-29 | 2013-03-27 | 无锡金阳电机有限公司 | Motor with magnetic rotor |
| CN207475301U (en) * | 2016-08-17 | 2018-06-08 | 源捷公司 | Electromotor cooling system |
| CN213402600U (en) * | 2020-11-26 | 2021-06-08 | 长城汽车股份有限公司 | Cooling structure of stator core and oil-cooled motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115296452A (en) * | 2022-08-22 | 2022-11-04 | 武汉理工通宇新源动力有限公司 | A stator punching structure of a low-loss oil-cooled flat wire motor |
| CN115296452B (en) * | 2022-08-22 | 2024-12-10 | 武汉理工通宇新源动力有限公司 | A stator punching structure for a low-loss oil-cooled flat wire motor |
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| Publication number | Publication date |
|---|---|
| CN114374281B (en) | 2023-08-29 |
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