CN113629957B - Semi-closed slot type stator punching sheet forming method of W-Pin winding motor - Google Patents
Semi-closed slot type stator punching sheet forming method of W-Pin winding motor Download PDFInfo
- Publication number
- CN113629957B CN113629957B CN202110895020.XA CN202110895020A CN113629957B CN 113629957 B CN113629957 B CN 113629957B CN 202110895020 A CN202110895020 A CN 202110895020A CN 113629957 B CN113629957 B CN 113629957B
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- tooth
- winding motor
- shoe
- pin winding
- stator punching
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- 238000004080 punching Methods 0.000 title claims abstract description 28
- 238000004804 winding Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000012043 crude product Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 238000003475 lamination Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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Classifications
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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
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
- H02K15/026—Wound cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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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)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a method for forming a semi-closed slot type stator punching sheet of a W-Pin winding motor, which comprises the steps of firstly reducing an included angle alpha between the axis of a tooth boot and the axis of a tooth body relative to an initial position in a twice punching mode, and then increasing the included angle alpha relative to the initial position, so that the change of the stress which is firstly increased, then reduced and then increased is realized, the stress distribution of the tooth boot is more uniform, the stress concentration condition is relieved, the radial line expansion and large opening line descending requirements of the W-Pin winding motor can be met, the comprehensive damage of the tooth body structure is ensured to be minimum, the reliability of the whole structure is improved, and the influence on the motor performance is reduced.
Description
Technical Field
The invention relates to a winding stator motor, in particular to a semi-closed slot type stator punching sheet forming method of a W-Pin winding motor.
Background
In the practical application of new energy automobiles, as the indexes of high power density and high torque density are higher and higher, flat wires with higher slot filling rate become the first choice in motor design. The main winding forms of the flat wire motor are hair Pin, I-Pin, W-Pin and the like, wherein the hair Pin and the I-Pin have the problems of large end welding resistance and large end size, so the winding forms of the W-Pin are adopted in many cases.
However, in this form, since the W-Pin winding motor needs to meet the requirements of radial wire expansion and large-opening wire-drawing, in the stator lamination, the openings of the tooth slots are large, however, the large opening of the tooth slots has a large influence on the motor performance, and the reliability of the overall structure is also reduced. If the sleeve is punched, the sleeve is designed into a small opening, and the requirement of the W-Pin winding motor on the off-line cannot be met. If the sleeve is punched into a large opening, after the completion of the line descending, the tooth shoes are punched to finish the sealing of the tooth grooves, so that the stress distribution of the tooth shoes is concentrated, the stator punching sheet is damaged, and the motor performance is influenced.
Disclosure of Invention
The invention aims to: the invention aims to provide a semi-closed slot type stator punching sheet forming method for a W-Pin winding motor, which can simultaneously meet the offline requirement of the W-Pin winding motor, has high structural reliability and relatively uniform stress distribution.
The technical scheme is as follows: the invention relates to a semi-closed slot type stator punching sheet forming method of a W-Pin winding motor, which comprises the following steps:
s1: sleeving and punching the blank to obtain a stator punching crude product, wherein an included angle between the axis of the tooth shoe and the axis of the tooth body is alpha, the radius of an arc formed between the inner side edge of the tooth shoe and the bottom surface of the tooth body is R1, and the radius of an arc formed between the outer side edge of the tooth shoe and the side surface of the tooth body is R2;
s2: stamping the tooth boots from outside to inside along two side edges of the tooth body respectively at the outer side of the tooth body in the stator punching crude product, so that the stamped alpha is reduced, R1 is reduced, R2 is increased, and then the line is cut off;
s3: and stamping the tooth shoe after completion of the line descending from the direction opposite to the tooth body from outside to inside, so that alpha of the stamped tooth shoe is increased, R1 is increased, R2 is reduced, and the semi-closed type sealing is completed.
Therefore, after the stator punching crude product is obtained, the first stamping is carried out on the tooth shoes, so that the opening of a tooth slot formed between two adjacent tooth shoes is enlarged, the offline is facilitated, the stamping is carried out in the opposite direction after the offline is finished, the tooth shoes finish the semi-closed type sealing of the tooth slot, the radial line expansion and large opening requirements of the W-Pin winding motor can be met, the stress distribution can be more uniform in a twice stamping mode, the condition of stress concentration is effectively relieved, and the comprehensive damage of the stator punching and the influence on the motor performance are reduced.
Preferably, in step S2, the outer side of the stamped shoe is collinear with the outer side of the tooth body.
Preferably, in step S3, the inner side edge of the stamped tooth shoe and the bottom surface of the tooth body are on the same arc line, in this process, as the tooth shoe of α increases, the stress of the tooth shoe decreases first and then increases, and finally the stress distribution of the entire tooth shoe is relatively uniform, thereby relieving the condition of stress concentration. Meanwhile, after the completion of the offline, the opening of the tooth slot is the smallest at the moment, so that the influence of the stress of the tooth shoe on the motor performance is reduced.
Preferably, in step S2, the stamping is performed by using a linear punch, so that the stamping efficiency of the tooth shoe can be improved, and the α can be ensured to be in a continuously reduced state.
Preferably, in step S3, the stamping is performed using a sector punch, which allows the tooth shoe to change from inside to outside and ensures that α is in a continuously increasing state.
Preferably, in the step S1, the width of the tooth boot is W, and R/W is more than or equal to 2.
Preferably, in the step S1, the length of the tooth boot is L, and the width of the tooth boot is W, wherein W/L is less than or equal to 0.5.
Preferably, in step S1, 15 DEG < alpha < 75 DEG, the above design can reduce the stress concentration coefficient to improve the reliability of the whole structure.
The beneficial effects are that: compared with the prior art, the invention has the advantages that: the radial wire expansion and large opening wire descending requirements of the W-Pin winding motor are met, the stress distribution of the tooth shoes is more uniform, the stress concentration condition is relieved, and the reliability of the integral structure is improved
Drawings
FIG. 1 is a schematic view of a stator lamination obtained by the present invention;
FIG. 2 is a schematic diagram of the structure of the teeth in the stator punching crude product;
FIG. 3 is a schematic view of the structure of the tooth after completion of the off-line;
fig. 4 is a schematic structural view of the tooth body after the semi-closed seal is completed.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings.
The invention relates to a semi-closed slot type stator punching sheet forming method of a W-Pin winding motor, which comprises the following steps:
s1: as shown in fig. 1, sleeve punching is carried out on a blank to obtain a stator punching sheet crude product, wherein an included angle between the axis of a tooth shoe and the axis of a tooth body is alpha, the radius of an arc formed between the inner side edge of the tooth shoe and the bottom surface of the tooth body is R1, the radius of an arc formed between the outer side edge of the tooth shoe and the side surface of the tooth body is R2, the width of the tooth shoe is W, and the length of the tooth shoe is L, wherein R/W is more than or equal to 2, W/L is less than or equal to 0.5, and 15 degrees are less than alpha and less than 75 degrees;
s2: as shown in fig. 2, the outer sides of the tooth bodies in the stator punching crude product are respectively punched from outside to inside along the two side edges of the tooth bodies by adopting a linear punch, so that the stamped alpha is reduced, the R1 is reduced, the R2 is increased until the outer side edges of the tooth shoes and the outer side edges of the tooth bodies are on the same straight line, at the moment, the alpha and the R2 are not existed, and then the line is cut off;
s3: as shown in fig. 3, a sector punch is adopted from the direction opposite to the tooth body, and the tooth boot after completion of the line descending is punched from inside to outside, so that alpha of the tooth boot after punching is increased, R1 is increased, R2 is reduced, and the half-closed sealing is completed until the inner side edge of the tooth boot and the bottom surface of the tooth body are on the same arc line, at the moment, alpha is 90 degrees, and R1 is not existed.
In step S1, the structural parameters of the tooth shoe are controlled, so that the stress concentration coefficient of the tooth shoe can be effectively reduced.
In the step S2, when the outer side edge of the tooth shoe and the outer side edge of the tooth body are on the same straight line, the stress of the tooth shoe is minimum, and the opening of the tooth slot is completely opened at the moment, so that the work personnel can conveniently perform the offline, and the radial line expansion and large opening offline requirements of the W-Pin winding motor are met. Then in S3, when the inner side edge of the tooth shoe and the bottom surface of the tooth body are on the same arc line, the tooth shoe performs semi-closed sealing on the tooth slot again, and the opening is the smallest at the moment, so that the influence of overlarge opening on the motor performance is reduced. On the other hand, in the deformation process of the tooth boot, the strain of the tooth boot is gradually increased, so that the stress concentration condition of the tooth boot is relieved in a twice forming mode of firstly reducing and then increasing, the stress distribution is more uniform, and the reliability of the whole structure is improved.
Claims (6)
1. A molding method of a semi-closed slot type stator punching sheet of a W-Pin winding motor is characterized by comprising the following steps: s1: sleeving and punching the blank to obtain a stator punching crude product, wherein an included angle between the axis of the tooth shoe and the axis of the tooth body is alpha, the radius of an arc formed between the inner side edge of the tooth shoe and the bottom surface of the tooth body is R1, and the radius of an arc formed between the outer side edge of the tooth shoe and the side surface of the tooth body is R2; s2: stamping the tooth boots from outside to inside along two side edges of the tooth body respectively at the outer side of the tooth body in the stator punching crude product, so that the stamped alpha is reduced, R1 is reduced, R2 is increased, and then the line is cut off; s3: stamping the tooth shoe after completion of the line descending from the direction opposite to the tooth body from inside to outside, so that alpha of the stamped tooth shoe is increased, R1 is increased, R2 is reduced, and semi-closed sealing is completed;
in step S1, 15 DEG < alpha < 75 deg.
2. The method for forming a half-closed slot type stator punching sheet of a W-Pin winding motor according to claim 1, wherein in step S2, the outer side of the stamped shoe is on the same straight line as the outer side of the tooth body.
3. The method for forming a half-closed slot type stator punching sheet of a W-Pin winding motor according to claim 1, wherein in step S3, the inner side edge of the punched tooth shoe and the bottom surface of the tooth body are on the same arc line.
4. The method for forming a half-closed slot stator lamination for a W-Pin winding motor according to claim 1, wherein in step S2, a linear punch is used for punching.
5. The method of forming a half-closed slot stator lamination for a W-Pin winding motor of claim 1, wherein in step S3, a fan-shaped punch is used for punching.
6. The method for forming a half-closed slot type stator punching sheet of a W-Pin winding motor according to claim 1, wherein in step S1, the length of the tooth shoe is L, and the width of the tooth shoe is W, W/L is equal to or less than 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110895020.XA CN113629957B (en) | 2021-08-04 | 2021-08-04 | Semi-closed slot type stator punching sheet forming method of W-Pin winding motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110895020.XA CN113629957B (en) | 2021-08-04 | 2021-08-04 | Semi-closed slot type stator punching sheet forming method of W-Pin winding motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113629957A CN113629957A (en) | 2021-11-09 |
| CN113629957B true CN113629957B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110895020.XA Active CN113629957B (en) | 2021-08-04 | 2021-08-04 | Semi-closed slot type stator punching sheet forming method of W-Pin winding motor |
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Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990040474A (en) * | 1997-11-18 | 1999-06-05 | 오상수 | Generator stator |
| JPH11252832A (en) * | 1998-03-06 | 1999-09-17 | Asmo Co Ltd | Core sheet, core and manufacture of armature |
| JP2000224789A (en) * | 1999-02-02 | 2000-08-11 | Asmo Co Ltd | Rotating machine |
| US20040187293A1 (en) * | 2003-03-25 | 2004-09-30 | Bradfield Michael Duane | Radial insertion of stator hairpin windings |
| JP2007195278A (en) * | 2006-01-17 | 2007-08-02 | Tamagawa Seiki Co Ltd | Ring stator |
| JP2009284707A (en) * | 2008-05-23 | 2009-12-03 | Mitsubishi Electric Corp | Rotary electric machine |
| JP2011036010A (en) * | 2009-07-31 | 2011-02-17 | Hitachi Ltd | Rotating electrical machine |
| CN102377261A (en) * | 2011-10-25 | 2012-03-14 | 珠海格力电器股份有限公司 | Modular motor stator |
| CN102983642B (en) * | 2012-11-15 | 2015-12-23 | 杜小兵 | Be provided with motor stator of deformability iron core and preparation method thereof |
| CN204538832U (en) * | 2015-04-22 | 2015-08-05 | 广东威灵电机制造有限公司 | Stator punching, Stator and electrical machine |
| CN110350684B (en) * | 2018-04-04 | 2023-06-09 | 长鹰信质科技股份有限公司 | Coiled small notch stator core and manufacturing method thereof |
| CN108736596A (en) * | 2018-08-24 | 2018-11-02 | 珠海格力电器股份有限公司 | Stator core and motor |
| CN111130232A (en) * | 2018-10-30 | 2020-05-08 | 广东威灵电机制造有限公司 | Stator core, motor stator and motor |
| CN212258557U (en) * | 2020-09-30 | 2020-12-29 | 安徽美芝精密制造有限公司 | Stator punching sheet, stator core, motor and compressor |
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2021
- 2021-08-04 CN CN202110895020.XA patent/CN113629957B/en active Active
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| CN113629957A (en) | 2021-11-09 |
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Address after: No. 2 Gangcheng Road, Economic Development Zone, Nanjing City, Jiangsu Province, 210046 Patentee after: WEIRAN (NANJING) POWER TECHNOLOGY CO.,LTD. Country or region after: China Address before: No.2 Gangcheng Road, Longtan Town, Qixia District, Nanjing City, Jiangsu Province, 210046 Patentee before: WEIRAN (NANJING) POWER TECHNOLOGY CO.,LTD. Country or region before: China |
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