CN113872362B - Novel flat wire, stator assembly, manufacturing method and flat wire motor - Google Patents
Novel flat wire, stator assembly, manufacturing method and flat wire motor Download PDFInfo
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- CN113872362B CN113872362B CN202111161527.9A CN202111161527A CN113872362B CN 113872362 B CN113872362 B CN 113872362B CN 202111161527 A CN202111161527 A CN 202111161527A CN 113872362 B CN113872362 B CN 113872362B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
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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
- H02K1/16—Stator cores with slots for windings
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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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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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
- H02K15/0056—Manufacturing winding connections
- H02K15/0068—Connecting winding sections; Forming leads; Connecting leads to terminals
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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
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- 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
Abstract
The invention relates to the technical field of motors, in particular to a novel flat wire and stator assembly, a manufacturing method and a flat wire motor, wherein the aspect ratio of the section of the flat wire is more than or equal to 1.8, the novel flat wire comprises a first straight line part and a second straight line part which are used for being embedded into a stator groove, one end of the first straight line part is connected with a first connecting part, one end of the second straight line part is connected with a second connecting part, and the first connecting part is connected with the second connecting part through a transition part; wherein the first connecting part is in bending connection with the transition part, and the bending radian radius R of the first connecting part 1 The cross section length of the flat wire cross section is larger than or equal to the cross section length of the flat wire. The novel flat wire provided by the invention has the advantages that the middle part of the flat wire with a large length-width ratio is improved, the first connecting part is in bending connection with the transition part, and the bending radian radius R of the novel flat wire 1 The length of the section of the flat wire is larger than or equal to that of the flat wire, so that the wire can meet the manufacturing process of stamping forming, repeated investment and modification of equipment and process are avoided, the quality of products can be improved, and the cost can be reduced.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a novel flat wire, a stator assembly, a manufacturing method and a flat wire motor.
Background
With the rapid development of new energy automobile technology, the performance requirements on the automobile motor are higher and higher, and the bottleneck of the new performance requirements of the current driving motor is difficult to break through by the round wire motor while the high slot fullness rate, the high power density and the high torque density of the motor are continuously pursued. The appearance of flat wire motor has realized the performance requirement that the round wire motor can't satisfy, has high groove fullness rate, high power density and good heat dispersion and NVH performance, can greatly reduced motor winding end height, reduces the copper consumption of winding with the copper volume reduction, and then improves automobile-used driving motor's efficiency.
In the prior art, the forming method of the flat wire mainly comprises bending forming, split drawing forming and stamping forming. The bending molding automation degree is high, the equipment cost is high, and the problem that the molding size cannot be strictly in place exists; the integral size of the head of the flat wire after the split drawing forming is larger, the integral space design of the motor is unfavorable, only one flat wire can be formed at a time, and the efficiency is low; the flat wire formed by stamping has the advantages of good quality, low cost and high mass production efficiency.
However, for the existing flat wire with the length-width ratio larger than 1.8, as shown in fig. 1 and 2, the flat wire with the common linear shape is relatively flat and has deep bent head, and can only be realized by a split-drawing forming process, but cannot be realized by a stamping forming process, and the split-drawing forming can cause the problems of large structural deformation, conductor damage, easy cracking and expansion caused by internal stress or strain of the flat wire in the bending process, and has poor mechanical property when being applied to a motor. Accordingly, for a flat wire with a high aspect ratio, a flat wire shape satisfying a press molding process is demanded.
Disclosure of Invention
In order to solve the defect that the large length-width ratio cannot be realized by a stamping forming process in the prior art, the invention provides a novel flat wire, wherein the length-width ratio of the section of the flat wire is more than or equal to 1.8, the novel flat wire comprises a first linear part and a second linear part which are used for being embedded into a stator groove, one end of the first linear part is connected with a first connecting part, one end of the second linear part is connected with a second connecting part, and the first connecting part is connected with the second connecting part through a transition part; wherein the first connecting part is in bending connection with the transition part, and the bending radian radius R of the first connecting part 1 The cross section length of the flat wire cross section is larger than or equal to the cross section length of the flat wire.
In one embodiment, the second connecting part is connected with the transition part in a bending way, and the bending radian radius R of the second connecting part 2 And the width of the section of the flat wire is 1.2 times or more.
In an embodiment, the included angles of the extension lines between the first straight line portion and the first connecting portion, between the first connecting portion and the second connecting portion, and between the second connecting portion and the second straight line portion are all obtuse angles.
In one embodiment, the value range of the included angle theta between the extension lines of the first connecting part and the second connecting part is 110 degrees less than or equal to 120 degrees when seen from the front projection of the plane defined by the first straight line part and the second straight line part of the flat wire.
In an embodiment, the flat wire is made of enameled rectangular copper wire.
In one embodiment, the flat wire is an integrally formed stamped structure.
In an embodiment, the first support leg and the second support leg are bent outwards in opposite directions or bent along one side in the same direction.
In an embodiment, the first leg and the second leg ends are provided with chamfers.
The invention also provides a stator assembly, which comprises a stator core and stator windings, wherein the inner wall of the stator core is provided with a plurality of stator grooves which are distributed at intervals along the circumferential direction of the stator core, the stator windings are arranged in the stator grooves, the stator windings are composed of flat wires which are regularly arranged, and the flat wires adopt the novel flat wires.
The invention also provides a manufacturing method of the flat wire applied to the stator assembly, which adopts the novel flat wire and comprises the following steps:
s1, forming a flat wire, namely punching the straight flat wire with the high length-width ratio into a novel flat wire shape with a first straight line part, a second straight line part, a first connecting part, a second connecting part and a transition part through punching forming equipment at one time;
s2, inserting the wire into a stator slot of a stator core in the stator assembly automatically through grabbing equipment according to a certain arrangement rule;
s3, twisting wires, and twisting tail ends of the first straight line part and the second straight line part of the flat wire radially along the stator assembly according to different winding methods to form a first supporting leg and a second supporting leg;
s4, welding the first support leg and the second support leg.
The invention also provides a flat wire motor, which adopts the novel flat wire.
Based on the above, compared with the prior art, the novel flat wire provided by the invention has the advantages that the middle part of the flat wire with a large length-width ratio is improved to enable the flat wire to be firstThe connecting part is in bending connection with the transition part, and the bending radian radius R of the connecting part 1 The length of the section of the flat wire is larger than or equal to that of the flat wire, so that the wire can meet the manufacturing process of stamping forming, repeated investment and modification of equipment and process are avoided, the quality of products can be improved, and the cost can be reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
For a clearer description of embodiments of the invention or of the solutions of the prior art, the drawings that are needed in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art; the positional relationships described in the drawings in the following description are based on the orientation of the elements shown in the drawings unless otherwise specified.
Fig. 1 is a schematic view of a conventional flat wire structure in the prior art;
fig. 2 is a schematic structural view of a conventional flat wire assembled into a stator core in the prior art;
fig. 3 is a schematic view of a novel flat wire structure provided by the invention;
fig. 4 is a front view and a top view of a projection plane a and a top plane b of the novel flat wire;
FIG. 5 is a top view of the novel flat wire provided by the present invention;
fig. 6 is a front view of a novel flat wire provided by the present invention;
fig. 7 is a perspective view of a novel flat wire in another embodiment provided by the present invention;
fig. 8 is a top view of a novel flat wire in another embodiment provided by the present invention;
fig. 9 is a side view of a new flat wire in another embodiment provided by the present invention;
fig. 10 is a perspective view of a stator assembly provided by the present invention.
Reference numerals:
10 first straight line portion 20 second straight line portion 30 first connecting portion
40 second connecting portion 50 transition portion 60 first leg
70 second support leg 2 stator core 1 stator winding
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention; the technical features designed in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs and are not to be construed as limiting the present invention; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Aiming at the problem that the prior flat wire with higher cross-section length-width ratio cannot adopt a stamping forming process due to the linear structure of the flat wire, the invention provides a novel flat wire, the cross-section length-width ratio of the flat wire is more than or equal to 1.8, the novel flat wire comprises a first linear part 10 and a second linear part 20 which are used for being embedded in a stator groove, one of the first linear part 10The end of the first straight line part 20 is connected with a first connecting part 30, the end of the second straight line part 20 is connected with a second connecting part 40, and the first connecting part 30 is connected with the second connecting part 40 through a transition part 50; wherein the first connecting portion 30 is in curved connection with the transition portion 50, and has a radius of curvature R 1 The cross-sectional length of the flat wire is greater than or equal to the cross-sectional length of the flat wire.
In specific implementation, as shown in fig. 3, 4, 5 and 6, the aspect ratio of the cross section of the flat wire is greater than or equal to 1.8, the whole flat wire is generally U-shaped, and includes a first straight line portion 10 and a second straight line portion 20, the first straight line portion 10 and the second straight line portion 20 are relatively parallel to each other, and the space between the number of stator slots spanned in the stator of the motor forms a span between the first straight line portion 10 and the second straight line portion, so that the span should be set according to the requirement of the actual stator of the motor, and the inclination angle between the two should also be set according to the different spans of stator slots at different radial positions required by the actual stator of the motor, which is not limited herein. The ends of the first straight line portion 10 and the second straight line portion 20 are respectively provided with a first connection portion 30 and a second connection portion 40, the first connection portion 30 and the second connection portion 40 are bent towards the center and are connected through a transition portion 50, compared with a common flat wire type, the flat transition is carried out through the transition portion 50, the flat wire type stator winding structure has the advantages that the occupied space of the flat wire head assembled in the stator is reduced, flat wire materials and cost are saved, and the compactness of the stator winding structure is guaranteed.
Wherein the first connecting portion 30 is in curved connection with the transition portion 50, in order to ensure that the flat wire with a high aspect ratio can be suitable for a stamping forming process, the radius of the bending radian is limited in this embodiment so that the bending radian radius R thereof 1 The length of the section of the flat wire is larger than or equal to that of the flat wire, so that the feasibility of the stamping forming process is ensured. The flat wire circular arc transition formed by stamping according to the design has good quality, the deformation of the internal structure is not large, and insulation damage and cracking are not easy to occur; the high-voltage insulation material is applied to a motor, and excellent insulation performance and mechanical property can be ensured. Preferably, its radius of curvature R 1 May be 1.2 to 1.5 times the cross-sectional length of the flat wire.
The novel flat wire provided by the invention improves the middle part of the flat wire with a large length-width ratio,the first connecting part is connected with the transition part in a bending way, and the bending radian radius R of the first connecting part is 1 The length of the section of the flat wire is larger than or equal to that of the flat wire, so that the wire can meet the manufacturing process of stamping forming, repeated investment and modification of equipment and process are avoided, the quality of products can be improved, and the cost can be reduced.
Preferably, the second connecting portion 40 is connected with the transition portion 50 in a bending manner, and has a bending radius R 2 And the width of the section of the flat wire is 1.2 times or more.
In particular, as shown in fig. 4 and 5, the present embodiment also includes a radius R of curvature for the curved connection of the second connection portion 40 and the transition portion 50 2 The width of the cross section of the flat wire is 1.2 times or more. Radius of curvature R 2 Preferably 1.25 times, 1.3 times, 1.4 times, 1.5 times. Through experimental study, if R 2 The lacquer coating of the flat wire with too small radius is easy to break in the stamping process, and R is the ratio of 2 When the width of the cross section of the flat wire is more than or equal to 1.2 times, the molding quality is better, and the qualification rate is high. Of course, R 2 Too large is also not desirable, because excessive mechanical deformation can cause the flat wire of metal material to be destroyed, making the shaping of the flat wire difficult. Preferably, the first connecting portion 30 and the transition portion 50 are convexly curved outwardly, and the second connecting portion 40 and the transition portion 50 are concavely curved inwardly.
Preferably, the included angles between the first straight line portion 10 and the first connecting portion 30, between the first connecting portion 30 and the second connecting portion 40, and between the second connecting portion 40 and the second straight line portion 20 are all obtuse angles. Preferably, the included angle between the first straight line portion 10 and the first connecting portion 30, and between the second connecting portion 40 and the second straight line portion 20 is preferably in the range of 100 ° to 130 °. The rectangular wire is arranged to be an obtuse angle, and on one hand, the rectangular wire is convenient to insert into the stator groove; on the other hand, the interference prevention effect between the adjacent flat wires of the assembled stator winding is better, and the reliability is high.
Preferably, the projection angle θ between the first connecting portion 30 and the second connecting portion 40 is in the range of 110 ° or more and 120 ° or less as seen in front projection from the plane defined by the first straight portion 10 and the second straight portion 20 of the flat wire.
In particular, as shown in fig. 10, the variation of the angle between the first connecting portion 30 and the second connecting portion 40 may affect the quality of the flat wire after assembly. Therefore, in this embodiment, the projection plane a is obtained by projecting the plane defined by the first straight line portion 10 and the second straight line portion 20 of the flat wire, and as shown in the upper diagram of fig. 4 and the front view of fig. 6, it is most suitable to find that the value of the included angle θ between the first connecting portion 30 and the second connecting portion 40 in the projection plane a is in the range of 110 ° or more and θ or less than 120 °. If the angle theta is selected to be too large or too small, the flat wire interference is caused; meanwhile, when the span between the first straight line portion 10 and the second straight line portion 20 is fixed, different θ angles have a great influence on the height of the flat wire head, and excessive θ angles can cause the height of the assembled flat wire head to be too long, which can cause cost increase, and the structure is not compact, thereby influencing the motor performance.
Further, as seen from the transition portion 50 of the flat wire toward the tail portion of the flat wire, the plane perpendicular to the projection plane a is a plane b in plan view, as shown in fig. 4, and in plan view in fig. 5; the first connection portion 30, the second connection portion 40, and the transition portion 50 of the flat wire head may be formed by intersecting two-dimensional line segments in the projection plane a and the top plane b to form a three-dimensional line segment during design, and scanning the three-dimensional line segment by modeling software.
Preferably, the flat wire is an integrally formed stamped structure. The structure rigidity is enough, the molding quality is good, the mass production is facilitated, and the production efficiency is improved.
Preferably, the first leg 60 is disposed at the other end of the first straight portion 10, and the second leg 70 is disposed at the other end of the second straight portion 20, and the first leg 60 and the second leg 70 are bent reversely to the outside or bent in the same direction along one side.
In the specific implementation, as shown in fig. 7, 8 and 9, the device further comprises a first support leg 60 arranged at the other end of the first straight line part 10 and a second support leg 70 arranged at the other end of the second straight line part 20; after the flat wire is inserted into the motor stator, the first support leg 60 and the second support leg 70 are twisted and bent outwards in the reverse direction or are twisted and bent along one side in the same direction through the wire twisting equipment, and particularly, the twisting and bending are performed according to the winding wiring mode of the actual motor stator, so that the welding between the follow-up support legs is facilitated.
Preferably, the first support leg 60 and the second support leg 70 are provided with chamfers at the ends, so that the wire is conveniently inserted when the stator core 200 is inserted, the risk of scratching the paint skin of the adjacent flat wire during wire insertion can be reduced, and the reliability of the motor is improved. In addition, the welding is convenient.
Preferably, the flat wire is made of enameled rectangular copper wire.
The invention also provides a stator assembly, which comprises a stator core 2 and stator windings 1, wherein the inner wall of the stator core 2 is provided with a plurality of stator grooves which are distributed at intervals along the circumferential direction of the stator core, the stator windings 1 are arranged in the stator grooves, the stator windings 1 are formed by flat wires which are regularly arranged, and the flat wires adopt the novel flat wires. As shown in fig. 10, after the flat wire formed by stamping is assembled into the stator core, the structure is compact, interference between adjacent flat wires is avoided, the height occupation space of the head of the flat wire is small, the cost is effectively saved, and the stator assembly performance is better. As can be seen from a specific comparison between fig. 2 and fig. 10, the stator assembly provided by the invention has a more compact structure and a smaller occupied space.
In summary, the present invention also provides a method for applying the novel flat wire to a stator assembly, specifically:
s1, forming a flat wire, namely punching the straight flat wire with the high length-width ratio into a novel flat wire shape with a first straight line part, a second straight line part, a first connecting part, a second connecting part and a transition part through punching forming equipment at one time;
s2, inserting the wire into a stator slot of a stator core in the stator assembly automatically through grabbing equipment according to a certain arrangement rule;
s3, twisting wires, and twisting tail ends of the first straight line part and the second straight line part of the flat wire radially along the stator assembly according to different winding methods to form a first supporting leg and a second supporting leg;
s4, welding the first support leg and the second support leg.
The invention also provides a flat wire motor, which adopts the novel flat wire, and the effects and actions of the flat wire motor are as described above, and are not repeated here.
In addition, it should be understood by those skilled in the art that although many problems exist in the prior art, each embodiment or technical solution of the present invention may be modified in only one or several respects, without having to solve all technical problems listed in the prior art or the background art at the same time. Those skilled in the art will understand that nothing in one claim should be taken as a limitation on that claim.
Although terms such as first straight line portion, second straight line portion, first connection portion, second connection portion, transition portion, first leg, second leg, stator core, stator winding, etc. are more used herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention; the terms first, second, and the like in the description and in the claims of embodiments of the invention and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The aspect ratio of the cross section of the flat wire is more than or equal to 1.8, and the flat wire is characterized in that: including being used for embedding first sharp portion (10) and second sharp portion (20) in the stator groove, the one end of first sharp portion (10) is connected with first connecting portion (30), the one end of second sharp portion (20) is connected with the second and connectsA section (40), the first connection section (30) and the second connection section (40) being connected by a transition section (50); wherein the first connecting part (30) is in bending connection with the transition part (50) and has a bending radius R 1 The section length of the flat wire is larger than or equal to that of the flat wire; the second connecting part (40) is in bending connection with the transition part (50); seen from the plane orthographic projection determined by the first straight line part (10) and the second straight line part (20) of the flat wire, the projection included angle theta between the first connecting part (30) and the second connecting part (40) is in a value range of 110 degrees more than or equal to theta less than or equal to 120 degrees; the first connecting part (30) and the second connecting part (40) are straight lines; the first connecting portion (30) and the second connecting portion (40) intersect after extending in a straight direction from a top plan view formed perpendicular to the first straight portion (10) and the second straight portion (20) at the same time; the flat wire is of an integrally formed stamping structure.
2. The flat wire according to claim 1, wherein: the second connecting part (40) and the transition part (50) have a bending radian radius R 2 And the width of the section of the flat wire is 1.2 times or more.
3. The flat wire according to claim 1, wherein: the included angles between the first straight line part (10) and the first connecting part (30), between the first connecting part (30) and the second connecting part (40) and between the second connecting part (40) and the second straight line part (20) are obtuse angles.
4. The flat wire according to claim 1, wherein: the flat wire is made of enameled copper flat wire.
5. The flat wire according to claim 1, wherein: the novel linear bending machine further comprises a first supporting leg (60) arranged at the other end of the first linear part (10) and a second supporting leg (70) arranged at the other end of the second linear part (20), wherein the first supporting leg (60) and the second supporting leg (70) are bent outwards reversely or bent along one side in the same direction; the ends of the first support leg (60) and the second support leg (70) are provided with chamfers.
6. A stator assembly, characterized in that: the stator comprises a stator core (2) and stator windings (1), wherein a plurality of stator grooves are formed in the inner wall of the stator core (2) and are distributed at intervals along the circumferential direction of the stator core, the stator windings (1) are arranged in the stator grooves, each stator winding (1) is composed of flat wires which are regularly arranged, and each flat wire is a flat wire according to any one of claims 1-5.
7. A method of manufacturing a flat wire for use in a stator assembly, wherein the flat wire of any one of claims 1-5 is used, comprising the steps of:
s1, forming a flat wire, namely stamping the straight flat wire with the high length-width ratio into a flat wire type with a first straight line part, a second straight line part, a first connecting part, a second connecting part and a transition part through stamping forming equipment at one time;
s2, inserting the wire into a stator slot of a stator core in the stator assembly automatically through grabbing equipment according to a certain arrangement rule;
s3, twisting wires, and twisting tail ends of the first straight line part and the second straight line part of the flat wire radially along the stator assembly according to different winding methods to form a first supporting leg and a second supporting leg;
s4, welding the first support leg and the second support leg.
8. A flat wire motor, characterized by: use of a flat wire according to any one of claims 1-5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161527.9A CN113872362B (en) | 2021-09-30 | 2021-09-30 | Novel flat wire, stator assembly, manufacturing method and flat wire motor |
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| CN202111161527.9A CN113872362B (en) | 2021-09-30 | 2021-09-30 | Novel flat wire, stator assembly, manufacturing method and flat wire motor |
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| CN113872362A CN113872362A (en) | 2021-12-31 |
| CN113872362B true CN113872362B (en) | 2023-05-02 |
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| JP6376542B2 (en) * | 2016-07-13 | 2018-08-22 | 古河樹脂加工株式会社 | Flat cable protection member, fitting structure of flat cable protection member, method of using flat cable protection member, and method of manufacturing the same |
| JP6576559B2 (en) * | 2016-07-22 | 2019-09-18 | 三菱電機株式会社 | Rotating electric machine and method of manufacturing unit coil of rotating electric machine |
| JP6789062B2 (en) * | 2016-10-27 | 2020-11-25 | 三菱電機株式会社 | Manufacturing method of stator and stator winding of rotary electric machine |
| JP6891799B2 (en) * | 2017-12-22 | 2021-06-18 | トヨタ自動車株式会社 | Molding equipment for coils |
| CN110640050B (en) * | 2019-08-28 | 2020-06-23 | 安徽巨一自动化装备有限公司 | Flat copper wire bending forming device |
| CN110571962B (en) * | 2019-09-16 | 2022-02-08 | 合肥巨一动力系统有限公司 | Flat wire motor stator |
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2021
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