CN117424406A - Motor stator core and preparation method thereof - Google Patents
Motor stator core and preparation method thereof Download PDFInfo
- Publication number
- CN117424406A CN117424406A CN202311181222.3A CN202311181222A CN117424406A CN 117424406 A CN117424406 A CN 117424406A CN 202311181222 A CN202311181222 A CN 202311181222A CN 117424406 A CN117424406 A CN 117424406A
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- stator core
- length direction
- rectangular strips
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- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 59
- 238000004804 winding Methods 0.000 claims abstract description 16
- 238000004080 punching Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000013078 crystal Substances 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 9
- 230000007246 mechanism Effects 0.000 description 14
- 230000004907 flux Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The application discloses a motor stator core and a preparation method thereof, wherein oriented electrical steel is divided into a plurality of rectangular strips along the length direction, and rectangular strips with grains oriented along the width direction of the rectangular strips more than grains oriented along the length direction of the rectangular strips are obtained. And connecting a plurality of rectangular strips along the length direction of the rectangular strips to obtain an intermediate strip with a constant width, wherein the magnetic permeability of the intermediate strip in the width direction is better than that of the intermediate strip in the length direction. And forming a plurality of teeth which are distributed at intervals along the length direction of the middle strip on one side of the width direction of the middle strip so as to obtain a tooth-shaped strip with teeth which can be used for winding coils, and winding the tooth-shaped strip in the length direction of the tooth-shaped strip so as to obtain a motor stator core, wherein the axial direction of the motor stator core is the length direction of oriented electrical steel. When the motor stator core works, the magnetic permeability of the oriented electrical steel in the length direction acts, so that the magnetic permeability of the motor stator core is improved, and the magnetic permeability of the motor stator core is more ideal.
Description
Technical Field
The application belongs to the technical field of motor parts, and particularly relates to a motor stator core and a preparation method thereof.
Background
The stator core is an important component of the motor magnetic circuit, which together with the rotor core and the air gap between the stator and the rotor forms the complete magnetic circuit of the motor. In an axial flux machine, because the air gap of the axial flux machine is planar, the air gap field is parallel to the machine axis, and in order to achieve optimal performance of the axial flux machine, the stator core of the axial flux machine is designed to have better magnetic permeability along the machine axis direction. The stator core in the axial flux motor is generally prepared from oriented electrical steel, and is limited by the difficulty of the preparation process of the oriented electrical steel, and the upper limit of the width value of the prepared oriented electrical steel is lower.
In the prior art, in order to facilitate the preparation of a stator core, the stator core is prepared by punching a plurality of teeth along the length direction of oriented electrical steel and then winding the oriented electrical steel with the plurality of teeth to obtain the stator core. The magnetic permeability of the oriented electrical steel in the width direction plays a role in the working process of the stator core. But the length direction of the oriented electrical steel is the direction in which most of microscopic grains in the oriented electrical steel are oriented, and the magnetic permeability of the oriented electrical steel in the width direction is far lower than that of the oriented electrical steel in the length direction. The magnetic conductivity of the stator core prepared by punching and winding along the length direction of the oriented electrical steel is still not ideal.
Disclosure of Invention
The stator core magnetic permeability of the axial flux motor is not ideal to a certain extent. To this end, the present application provides a motor stator core and a method of manufacturing the same.
The preparation method of the motor stator core provided by the embodiment of the application comprises the following steps:
dividing the oriented electrical steel into a plurality of rectangular strips along the length direction, wherein more crystal grains are oriented in the width direction of the rectangular strips than in the length direction of the rectangular strips;
connecting a plurality of rectangular strips along the length direction of the rectangular strips to obtain an intermediate strip with unchanged width;
forming a plurality of teeth which are distributed at intervals along the length direction of the middle strip on one side of the width direction of the middle strip so as to obtain a toothed strip;
and winding the toothed bar along the length direction of the toothed bar to obtain the motor stator core.
Optionally, the "connecting a plurality of the rectangular strips along the length direction of the rectangular strips to obtain a middle strip with a constant width" includes:
dividing the rectangular strips into first to nth rectangular strips, wherein n is a positive integer, and the number of the first to nth rectangular strips is greater than 3 and the number of the first to nth rectangular strips is the same;
and (3) sequentially arranging and connecting each kth rectangular strip along the length direction of the rectangular strip, wherein the kth rectangular strip is connected to the (k-1) th rectangular strip in a laminated manner, k is a positive integer and is equal to or less than 1 and equal to or less than k and is equal to or less than n, and the intermediate strip is obtained.
Optionally, the "the kth rectangular strips are sequentially aligned and connected along the length direction of the rectangular strips, and the kth rectangular strips are stacked and connected to the (k-1) th rectangular strips", including:
sequentially arranging a plurality of first rectangular strips along the length direction of the rectangular strips, wherein the ends of the first rectangular strips are contacted;
connecting two adjacent first rectangular strips;
and sequentially laminating and connecting the second rectangular strip to the kth rectangular strip on the first rectangular strip, and repeating the steps on each layer of rectangular strip to obtain the intermediate strip.
Alternatively, if k is equal to 1, the "connecting two adjacent first rectangular bars" includes:
welding two adjacent first rectangular strips.
Optionally, if k is greater than or equal to 2, the "sequentially stacking and connecting the second to the kth rectangular bars on the first rectangular bar" includes:
when the rectangular strips are stacked, the ends of two adjacent rectangular strips in height are staggered, and the two adjacent rectangular strips are connected in an adhesion manner.
Optionally, the "connecting two adjacent first rectangular strips" includes:
and adhering two adjacent first rectangular strips.
Optionally, the thickness of the motor stator core is 1-5000 times that of the middle strip.
Optionally, the "dividing the oriented electrical steel into a plurality of rectangular strips along the length direction" includes:
punching and shearing the oriented electrical steel along the length direction to divide the oriented electrical steel into a plurality of rectangular strips.
Optionally, the "dividing the oriented electrical steel into a plurality of rectangular strips along the length direction" includes:
dividing the oriented electrical steel into a plurality of rectangular strips with the same size along the length direction.
The application provides a motor stator core, which is prepared according to the preparation method.
The embodiment of the application has at least the following beneficial effects:
when the motor stator core is manufactured, the oriented electrical steel is divided into a plurality of rectangular strips along the length direction, and the rectangular strips with grains oriented along the width direction of the rectangular strips more than grains oriented along the length direction of the rectangular strips can be obtained. And connecting a plurality of rectangular strips along the length direction of the rectangular strips to obtain an intermediate strip with unchanged width, wherein the micro-level of the whole intermediate strip has more crystal grains oriented in the width direction of the intermediate strip than the crystal grains oriented along the length direction of the intermediate strip, and the magnetic conductivity of the intermediate strip in the width direction is better than that of the intermediate strip in the length direction. And finally, forming a plurality of teeth which are distributed at intervals along the length direction of the middle strip on one side of the width direction of the middle strip so as to obtain a tooth-shaped strip with teeth which can be used for winding coils, and winding the tooth-shaped strip in the length direction of the tooth-shaped strip so as to obtain the motor stator core, wherein the width direction of the tooth-shaped strip is the axial direction of the motor stator core and the direction (namely the length direction of oriented electrical steel) of the rectangular strip with more grain orientation. When the motor stator core works, the axial acting magnetic conductivity of the oriented electrical steel in the length direction is higher than that of the iron core with the magnetic conductivity of the oriented electrical steel in the width direction in the prior art, so that the magnetic conductivity of the motor stator core is greatly improved, and the magnetic conductivity of the motor stator core is more ideal.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a stator core of a motor provided by the application.
Fig. 2 is a schematic structural diagram of the oriented electrical steel provided in the present application.
Fig. 3 to 6 are views illustrating the process of manufacturing the oriented electrical steel provided in the present application.
Fig. 7 is a schematic partial structure of a stator core of a motor according to the present application.
Reference numerals illustrate: 1. oriented electrical steel; 2. a rectangular bar; 3. an intermediate strip; 4. tooth-shaped strips; 10. a motor stator core; 101. a yoke; 102. teeth.
Detailed Description
In order to make the technical personnel in the technical field of the present application more clearly understand the present application, the following detailed description of the technical scheme of the present application is given by specific embodiments with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for manufacturing a motor stator core provided in the present application, and referring to fig. 1, it can be known that the method for manufacturing a motor stator core provided in the embodiment of the present application includes:
s101: the oriented electrical steel is divided into a plurality of rectangular strips along the length direction, and more crystal grains are oriented along the width direction of the rectangular strips than along the length direction of the rectangular strips in the rectangular strips.
S102: a plurality of rectangular strips are connected along the length direction of the rectangular strips to obtain an intermediate strip with constant width.
S103: a plurality of teeth are formed on one side of the middle strip in the width direction and are distributed at intervals along the length direction of the middle strip so as to obtain the toothed strip.
S104: and winding the tooth-shaped strip along the length direction of the tooth-shaped strip to obtain the motor stator core.
When the motor stator core is manufactured, the oriented electrical steel is divided into a plurality of rectangular strips along the length direction, and the rectangular strips with grains oriented along the width direction of the rectangular strips more than grains oriented along the length direction of the rectangular strips can be obtained. And connecting a plurality of rectangular strips along the length direction of the rectangular strips to obtain an intermediate strip with unchanged width, wherein the micro-level of the whole intermediate strip has more crystal grains oriented in the width direction of the intermediate strip than the crystal grains oriented along the length direction of the intermediate strip, and the magnetic conductivity of the intermediate strip in the width direction is better than that of the intermediate strip in the length direction. And finally, forming a plurality of teeth which are distributed at intervals along the length direction of the middle strip on one side of the width direction of the middle strip so as to obtain a tooth-shaped strip with teeth which can be used for winding coils, and winding the tooth-shaped strip in the length direction of the tooth-shaped strip so as to obtain the motor stator core, wherein the width direction of the tooth-shaped strip is the axial direction of the motor stator core and the direction (namely the length direction of oriented electrical steel) of the rectangular strip with more grain orientation. When the motor stator core works, the axial acting magnetic conductivity of the oriented electrical steel in the length direction is higher than that of the iron core with the magnetic conductivity of the oriented electrical steel in the width direction in the prior art, so that the magnetic conductivity of the motor stator core is greatly improved, and the magnetic conductivity of the motor stator core is more ideal. And under the condition of the same unit thickness, the magnetic conductivity of the motor stator core in the application is superior to that of the stator core in the prior art, and the motor stator core in the application can reduce the thickness required by the motor stator core under the condition of the same magnetic conductivity. The installation and use space of the motor stator core can be reduced, and the motor stator core can be applied to more scenes.
The number of grains oriented in the width direction of the rectangular bar is larger than that oriented in the length direction of the rectangular bar, and the grains can be measured by a crystal material orientation degree instrument or a crystal orientation instrument. The present application is not limited in this regard.
In some embodiments provided herein, in step S101, "dividing the oriented electrical steel into a plurality of rectangular strips along the length direction" may include: the oriented electrical steel is punched and sheared along the length direction to be divided into a plurality of rectangular strips.
The punching shear can facilitate the division of the oriented electrical steel, can also ensure the quality of the rectangular strips obtained by division, and is beneficial to improving the overall quality of the motor stator core obtained by the rectangular strips.
In some embodiments provided herein, the punching shear of the oriented electrical steel may be achieved by a punching shear device. The punching shear device at least comprises a feeding mechanism driven by a servo motor, a limiting mechanism which is spaced from the feeding mechanism and is used for limiting the width direction of the oriented electrical steel, and a punching shear mechanism which is positioned at the feeding end part of the feeding mechanism. The stable punching shear of the oriented electrical steel can be realized, and the punching shear quality of the obtained rectangular strip is ensured.
In certain embodiments provided herein, the feeding mechanism may be a conveyor belt, the oriented electrical steel may be disposed along the conveyor belt, and the length direction of the oriented electrical steel is parallel to the conveying direction of the conveyor belt. The limiting mechanism can comprise two limiting plates which are connected with the frame of the feeding mechanism and are positioned on two sides of the oriented electrical steel in the width direction, so that the movement limiting of the oriented electrical steel is realized. The punching shear mechanism can comprise a base which is spaced from one end of the feeding mechanism and is used for receiving oriented electrical steel, a driving piece connected with the base, a punching shear blade connected with the driving piece, and a cutting edge of the punching shear blade opposite to the base. The driving piece is used for driving the punching shear blade to reciprocate along the direction perpendicular to the conveying direction of the conveying belt and the conveying surface so as to realize punching shear on the oriented electrical steel. The division of the oriented electrical steel is convenient to realize. The driving piece can also be a servo motor, so that the cutting precision of the rectangular strip is improved.
In certain embodiments provided herein, the division of the oriented electrical steel into a plurality of rectangular strips may also be obtained by cutting with a device or by scribing, which is not limited in this application.
In some embodiments provided herein, in step S101, "dividing the oriented electrical steel into a plurality of rectangular strips along the length direction" includes: the oriented electrical steel is divided into a plurality of rectangular strips with the same size along the length direction.
The oriented electrical steel is divided into a plurality of rectangular strips with the same size along the length direction, so that the rectangular strips can be conveniently prepared into middle strips with unchanged widths. The magnetic conductivity of each part in the motor stator core prepared by the rectangular strips can be ensured to be consistent, and the quality of the motor stator core is improved.
In some embodiments provided herein, the oriented electrical steel may also be prepared as rectangular strips of various sizes. Rectangular bars of various sizes may be used to produce a plurality of differently sized motor stator cores. The present application is not limited in this regard.
For ease of understanding, fig. 2 may be provided herein, and fig. 2 is a schematic structural diagram of the oriented electrical steel provided in the present application, and referring to fig. 2, it may be known that the oriented electrical steel 1 may be divided into rectangular strips 2 along a length direction.
In some embodiments provided herein, in step S102, "connecting a plurality of rectangular bars along a length direction of the rectangular bars to obtain an intermediate bar with a constant width" includes:
dividing the rectangular strips into first to nth rectangular strips, wherein n is a positive integer, and the numbers of the first to nth rectangular strips are all larger than 3 and the same. And (3) sequentially arranging and connecting each kth rectangular strip along the length direction of the rectangular strip, wherein the kth rectangular strip is connected to the (k-1) th rectangular strip in a lamination manner, k is a positive integer and is equal to or less than 1 and equal to or less than n, and thus the intermediate strip is obtained.
The rectangular strips are divided into the first rectangular strip, the nth rectangular strip and the third rectangular strip, wherein the number of the first rectangular strip, the nth rectangular strip and the third rectangular strip is more than 3, and the rectangular strips can be conveniently connected. And each kth rectangular strip is sequentially arranged and connected along the length direction of the rectangular strip, and the kth rectangular strip is connected to the (k-1) th rectangular strip in a stacking manner, so that the connection strength between the rectangular strips can be increased, the follow-up number of winding layers of the obtained intermediate strip can be increased, and the number of winding layers required by the follow-up winding tooth-shaped strip can be reduced.
The motor stator core meeting the requirements can be obtained after the follow-up winding toothed bar reaches a certain thickness and the magnetic permeability meets the requirements.
In some embodiments provided herein, "each kth rectangular bar is sequentially aligned and connected along the length direction of the rectangular bar, and the kth rectangular bar is stacked and connected to the (k-1) th rectangular bar", including:
the first rectangular strips are sequentially arranged along the length direction of the rectangular strips, and the ends of the first rectangular strips are contacted. Two adjacent first rectangular strips are connected.
And sequentially laminating and connecting second to kth rectangular strips on the first rectangular strip, and repeating the steps on each layer of rectangular strip to obtain an intermediate strip. The preparation of the middle strip adopts the mode, and the placement position of the rectangular strips can be adjusted before, so that the widths of the rectangular strips can be consistent, and the rectangular strips can be tightly connected. The quality of the intermediate strips obtained by connection is better so as to improve the quality of the finally obtained motor stator core.
When arranging the rectangular strips, the rectangular strips can be marked so as to be convenient for arranging the rectangular strips.
In some embodiments provided herein, a plurality of first rectangular strips may be arranged along a length direction of a rectangular strip, and each rectangular strip is connected to an end portion of a previous rectangular strip, so that an intermediate strip with a constant width may be obtained. The present application is not limited in this regard.
In some embodiments provided herein, if k is equal to 1, "connecting two adjacent first rectangular bars" may include: two adjacent first rectangular strips are welded.
When k is equal to 1, the intermediate bar is formed by connecting the first rectangular bar along the length direction of the rectangular bar. The rectangular strips are welded, so that the connection strength of the middle strip can be improved, the use strength of the finally obtained motor stator core is improved, and the stable performance of the subsequent steps is ensured.
For ease of understanding, fig. 3 may be provided herein, with fig. 3 being the middle bar 3 configuration where k is equal to 1.
In some embodiments provided herein, if k is greater than or equal to 2, "sequentially stacking and connecting the second to the kth rectangular bars on the first rectangular bar" includes: when the two rectangular strips are stacked, the ends of the two adjacent rectangular strips are staggered in height, and the two adjacent rectangular strips are connected in an adhesion manner.
And when k is greater than or equal to 2, the middle strip is of a structure in which at least two layers of rectangular strips are in composite connection. When the two rectangular strips are stacked, the end parts of the two adjacent rectangular strips are staggered, so that the connection part of the two adjacent rectangular strips in the length direction of the rectangular strips is contacted by the two adjacent rectangular strips in the height direction, the two adjacent rectangular strips are adhered, the connection strength of the two adjacent rectangular strips can be increased, and the quality of the obtained middle strip is better.
In some embodiments provided herein, the orthographic projection of one rectangular bar on a horizontal plane may coincide with the orthographic projection of the other rectangular bar on the horizontal plane by half the area of the two rectangular bars adjacent in height. The middle strip with better strength can be obtained.
For ease of understanding, fig. 4 may be provided herein, where fig. 4 is an intermediate bar 3 when k is equal to 2, and the intermediate bar is seen to be a composite structure. When the ends of two adjacent rectangular strips are staggered in height, the middle strip of the composite structure can be cut at the part with inconsistent thickness at the two ends of the middle strip and then the whole strip is wound. The parts with inconsistent thickness can be stacked and wound. The present application is not limited in this regard.
In some embodiments provided herein, "connecting two adjacent first rectangular bars" includes: two adjacent first rectangular strips are adhered. The adhesion relative welding mode has smaller influence on the magnetic conductivity of the rectangular strip, and is beneficial to improving the magnetic conductivity of the middle strip while guaranteeing the use strength of the obtained middle strip. And because there is the contact adhesion between two adjacent rectangle strips in the height, consequently the condition that rectangle strip separation also can not appear in the intermediate strip, can effectively guarantee the whole quality of final motor stator core who obtains.
In certain embodiments provided herein, the connection between the rectangular strips where contact is present may be adhered by glue. The present application is not limited in this regard. The glue material connecting the two rectangular strips may be at least one of an acrylic, epoxy or alkyd. The connecting strength between the rectangular strips can be effectively improved, and the magnetic conductivity of the rectangular strips is hardly influenced.
In some embodiments provided herein, the glue connection between the rectangular strips may be achieved by a glue application device. The gluing can be realized through the manipulator of gluing equipment, and the positioning mechanism of accessible gluing equipment is positioned in putting the rectangle strip during the gluing. The specific structure of the positioning mechanism may refer to the specific structure of the aforementioned limiting mechanism, and will not be described herein.
In some embodiments provided herein, the thickness of the motor stator core is 1 to 5000 times the thickness of the intermediate bar. The thickness of the motor stator core is the multiple of the thickness of the middle strip, so that the use strength of the obtained motor stator core can be ensured, and meanwhile, the motor stator core is lighter in weight and better in overall magnetic conductivity. Can effectively balance the preparation cost and the use quality.
In certain embodiments provided herein, step S103 may be implemented by a notching apparatus. The specific structure of the notching device can refer to the specific structure of the notching device, and the operation principle of the notching device and the notching device is similar, and the notching device is not repeated here.
For ease of understanding, fig. 5 may be provided herein, and fig. 5 is a toothed bar 4 structure provided herein.
S104: and winding the tooth-shaped strip along the length direction of the tooth-shaped strip to obtain the motor stator core.
Step S104 may be implemented by a coil mechanism.
For ease of understanding, fig. 6 may be provided herein, and fig. 6 is an intermediate structure of a wound tooth bar provided herein, where multiple layers of tooth bar are wound to obtain a motor stator core.
Fig. 7 is a schematic partial structure of a motor stator core provided in the present application, and referring to fig. 7, it can be known that the present application provides a motor stator core, which can be prepared according to the preparation method described above. The corresponding beneficial effects of the motor stator core can be referred to the foregoing, and will not be described herein. The motor stator core includes a yoke portion and a tooth portion connected to the yoke portion.
In some embodiments provided herein, the width of the oriented electrical steel 1 may be 184mm, and the width of the rectangular bar 2 obtained by dividing may be 21.58mm. The tooth length of the finally prepared motor stator core can be 19.07mm, and the yoke width can be 2.51mm. It should be noted that the data herein are merely examples to increase understanding of the present application, and the present application does not limit the relevant data.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (10)
1. A method of manufacturing a stator core for an electric machine, comprising:
dividing the oriented electrical steel into a plurality of rectangular strips along the length direction, wherein more crystal grains are oriented in the width direction of the rectangular strips than in the length direction of the rectangular strips;
connecting a plurality of rectangular strips along the length direction of the rectangular strips to obtain an intermediate strip with unchanged width;
forming a plurality of teeth which are distributed at intervals along the length direction of the middle strip on one side of the width direction of the middle strip so as to obtain a toothed strip;
and winding the toothed bar along the length direction of the toothed bar to obtain the motor stator core.
2. The method of manufacturing a stator core of an electric motor according to claim 1, wherein "connecting a plurality of the rectangular bars in a length direction of the rectangular bars to obtain a width-unchanged intermediate bar" includes:
dividing the rectangular strips into first to nth rectangular strips, wherein n is a positive integer, and the number of the first to nth rectangular strips is greater than 3 and the number of the first to nth rectangular strips is the same;
and (3) sequentially arranging and connecting each kth rectangular strip along the length direction of the rectangular strip, wherein the kth rectangular strip is connected to the (k-1) th rectangular strip in a laminated manner, k is a positive integer and is equal to or less than 1 and equal to or less than k and is equal to or less than n, and the intermediate strip is obtained.
3. The method of manufacturing a stator core of an electric motor according to claim 2, wherein "the kth rectangular bars are sequentially aligned and connected in the length direction of the rectangular bars, and the kth rectangular bars are stacked and connected to (k-1) th rectangular bars", comprises:
sequentially arranging a plurality of first rectangular strips along the length direction of the rectangular strips, wherein the ends of the first rectangular strips are contacted;
connecting two adjacent first rectangular strips;
and sequentially laminating and connecting the second rectangular strip to the kth rectangular strip on the first rectangular strip, and repeating the steps on each layer of rectangular strip to obtain the intermediate strip.
4. A method of manufacturing a stator core for an electric motor according to claim 3, wherein if k is equal to 1, the "connecting two adjacent first rectangular bars" includes:
welding two adjacent first rectangular strips.
5. The method of manufacturing a stator core for an electric motor according to claim 3, wherein if k is greater than or equal to 2, "the second to k-th rectangular bars are sequentially stacked and connected on the first rectangular bar" includes:
when the rectangular strips are stacked, the ends of two adjacent rectangular strips in height are staggered, and the two adjacent rectangular strips are connected in an adhesion manner.
6. The method of manufacturing a stator core of an electric motor according to claim 5, wherein said connecting adjacent two of said first rectangular bars includes:
and adhering two adjacent first rectangular strips.
7. The method of manufacturing a motor stator core according to any one of claims 1 to 6, characterized in that the thickness of the motor stator core is 1 to 5000 times the thickness of the intermediate strip.
8. The method of manufacturing a stator core for an electric motor according to any one of claims 1 to 6, wherein the dividing the oriented electrical steel into a plurality of rectangular bars in the longitudinal direction includes:
punching and shearing the oriented electrical steel along the length direction to divide the oriented electrical steel into a plurality of rectangular strips.
9. The method of manufacturing a stator core for an electric motor according to any one of claims 1 to 6, wherein the dividing the oriented electrical steel into a plurality of rectangular bars in the longitudinal direction includes:
dividing the oriented electrical steel into a plurality of rectangular strips with the same size along the length direction.
10. A stator core for an electric motor, characterized by being produced by the production method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311181222.3A CN117424406A (en) | 2023-09-11 | 2023-09-11 | Motor stator core and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311181222.3A CN117424406A (en) | 2023-09-11 | 2023-09-11 | Motor stator core and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117424406A true CN117424406A (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311181222.3A Pending CN117424406A (en) | 2023-09-11 | 2023-09-11 | Motor stator core and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN117424406A (en) |
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2023
- 2023-09-11 CN CN202311181222.3A patent/CN117424406A/en active Pending
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