CN101710765B - Stator assembly method - Google Patents
Stator assembly method Download PDFInfo
- Publication number
- CN101710765B CN101710765B CN2009102598841A CN200910259884A CN101710765B CN 101710765 B CN101710765 B CN 101710765B CN 2009102598841 A CN2009102598841 A CN 2009102598841A CN 200910259884 A CN200910259884 A CN 200910259884A CN 101710765 B CN101710765 B CN 101710765B
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- tooth
- lamination
- stator
- assemble method
- teeth
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000003475 lamination Methods 0.000 claims description 108
- 238000009413 insulation Methods 0.000 claims description 15
- 210000000515 tooth Anatomy 0.000 description 74
- 238000004804 winding Methods 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 206010055001 Hypodontia Diseases 0.000 description 3
- 206010002583 anodontia Diseases 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000005213 hypodontia Effects 0.000 description 3
- 201000006680 tooth agenesis Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides an assembly method of a laminated stator for a motor, which comprises the steps of: a, providing a plurality of laminated plates, wherein each laminated plate comprises a ring part with a center line and a plurality of teeth arranged at intervals of equal angle distances along the circumferential direction of the ring part, and the teeth of all laminated plates are equal; b, sequentially coaxially fixing the laminated plates to enable the laminated plates to be arranged at a distance of preset axial distance mutually; and c, rotating the laminated plates around the common center line to a preset angle position, pressing the laminated plates to enable the ring parts of the laminated plates to be overlapped on the axial direction, wherein the teeth of the laminated plates are crossly arranged along the circumferential directions of the ring parts, and thereby a tooth of another laminated plate is arranged between every two adjacent teeth of each laminated plate. The invention also provides a laminated stator manufactured by the assembly method.
Description
Technical field
The present invention relates in general to a kind of stator assemble method, more specifically, relates to a kind of assemble method of the stacked stator that is used for motor and the stator that makes by this assemble method.
Background technology
Referring to shown in Figure 10, core structure in traditional unitary stator that is used for brushless permanent magnet motor, stator core in be formed centrally circular hole, on outer circumference surface, form a plurality of radial wire casings, at the inside of wire casing winding around, between two wire casings, be formed with stator tooth, the free end of stator tooth is the cambered surface with certain radian, the end cambered surface of all stator tooths limits an annular side face concentric with described circular hole, wire casing has a slit on the side face of stator tooth free end place, for being used to guide the coiling pin of winding wire therefrom to pass when winding the line.
Because the volume that the coiling pin is intrinsic, described narrow meeting can not be designed very narrowly, still, can not design widely, otherwise can reduce the copper factor of wire casing significantly.Therefore, traditional unitary stator structure exists machinery coiling difficulty or copper factor is low or stock utilization is low problem.
Traditional sectional type stator structure, though can realize higher copper factor,, the packaging technology complexity after the coiling of sectional type stator structure, wiring the end of a thread of winding is many.
At the problem of traditional stator structure, multiple improvement structure has been proposed, for example U.S. Pat 6,583,530B2, US 6,404,095B1, US 6,400, disclosed stator structure among the 059B1, wherein each tooth winds the line individually, and the tooth that will have coiling afterwards is connected to the stator yoke portion of segmentation, and the stator yoke portion with segmentation is assembled into complete stator by interlocking structure then.As can be seen, the assembling procedure of this stator structure is various, only is suitable for the few situation of the stator number of teeth.
US 6,781, and 278B2 also discloses a kind of stator structure, and the gear ring that wherein is tied with winding is fixed on the stator body by means of alignment pin.Because gear ring all teeth when stator shaft orientation is installed need be fitted on the groove structure corresponding on the stator body, therefore, it is big that this stator structure is assembled difficulty.
In US2009/0183357A1 and the disclosed stator structure of US7538467B2, two stator yoke component models connect the location in the axial direction, form fit by shank and boots portion constitutes a complete stator, and make whole circumferentially on the opening of wire casing become same angle tilt with respect to stator shaft orientation.For this stator structure, though can reduce the teeth groove moment of motor,, assembly precision requires high, and copper factor is difficult to increase substantially, and in addition, needs the extra clamping and fixing device that is used for preventing the module circumferential misalignment when coiling.
In the stator structure of describing among WO2004/098023A1 and the WO2006/018346A1, be close to vertically by two modules as the master unit of stator and be provided with and form, wherein the shank of each module width vertically equates substantially that with the axial width of module each shank winds the line separately.This stator structure has problems such as copper factor is low, coiling the end of a thread is many.
The present invention is intended to overcome one or more in the problems referred to above.
Summary of the invention
The stator structure that the object of the present invention is to provide that the assemble method that is used for stator that a kind of packaging efficiency is improved and a kind of convenience that winds the line, copper factor height, coiling the end of a thread are few, the reduction of the stator assembling degree of eccentricity, vibration and noise reduces.
Above-mentioned purpose of the present invention is to realize by such assemble method: this assemble method may further comprise the steps:
A) provide a plurality of laminations, each lamination comprise ring portion with a central axis and along ring portion circumferentially to equate angle apart from a plurality of teeth that are provided with at interval, the number of teeth of each lamination equates;
B) described a plurality of laminations are fixing coaxially successively, make the predetermined axial distance of described a plurality of lamination each interval;
C) on all teeth, twine coiling, make all teeth that belong to same phase of this stator twine by a continuous coiling;
D) described a plurality of laminations are turned to predetermined angular position around common central axis, the described a plurality of laminations of pressing, make that the ring portion of described a plurality of laminations is stacked in the axial direction, and the tooth of described a plurality of laminations circumferentially is crisscross arranged along ring portion, thereby has a tooth of each other lamination between the adjacent teeth of each lamination.
According to assemble method of the present invention, because before coiling that a plurality of laminations are coaxial fixing and make the certain axial spacing of lamination each interval, therefore, make that the space for coiling increases, coiling is convenient.In addition, on the basis that winds the line easily, can adopt a sufficiently long coiling all teeth that belong to same phase around intact stator, therefore, it is many to have overcome the wiring that winds the line in the prior art, the defective that joint is easily loosening, and can reduce the degree of eccentricity after the stator assembling, help reducing the vibration and the noise of motor.
In one embodiment, step a) is included in the recess of the tooth root part of the tooth that is provided for holding other lamination on the ring portion of each lamination between the circumferential adjacent tooth of this lamination.By means of this recess, can advantageously before the described a plurality of laminations of pressing, make described a plurality of lamination in upwards alignment of week, make pressing working procedure successfully to finish.
Advantageously, step a) comprises that the ring portion of the lamination that makes described tooth and its place is one-body molded.This integral formation method comprises molded and shaped or excision forming etc.Can reduce like this and make the needed operation of lamination.
Advantageously, step a) comprises by superimposed identical shaped a plurality of gear pieces and forms described tooth.In one embodiment, described a plurality of gear pieces can cut from existing unitary stator iron core finished product, stamping-out makes, and therefore, described a plurality of gear pieces are in aspect unanimities such as shape, material, sizes, and this helps the stator shaping of teeth.
Advantageously, described a plurality of gear piece is by sealed, riveted or the bonding superimposed connection that fixes each other.
Advantageously, described a plurality of gear piece is provided with by the alignment pin alignment.
Advantageously, step a) comprises that described tooth is done insulation to be handled.For realizing the insulation of stator core and coiling, need do insulation to the tooth of each lamination or each lamination and handle.This insulation processing can comprise insulating case is installed on the described tooth, makes described tooth remove the tooth root part and tooth ends exceptionally is insulated the cover covering.When single tooth is formed by stacking by a plurality of gear pieces, the alignment pin of the described a plurality of gear pieces that can on insulating case, be provided for aliging.
In one embodiment, the quantity of described lamination is 2.
Correspondingly, the present invention also provides a kind of stacked stator that makes by above-mentioned assemble method.This stator can be internal stator or external stator.
Description of drawings
Describe specific embodiments of the invention with reference to the accompanying drawings in detail.To those skilled in the art, above-mentioned and other purposes of the present invention, feature and advantage will be apparent.
Fig. 1 illustrates the stereogram of the thin slice that is used for stator of the present invention;
Fig. 2 is the stereogram according to stator lasmination of the present invention;
Fig. 3 is the stereogram of main part that is used for the seal of stator lasmination of the present invention;
Fig. 4 is the schematic diagram of cap of the insulating case of the single insulating case device that is used for Fig. 3;
Fig. 5 is the stereogram through the stator lasmination of the present invention of insulation processing;
Fig. 6 be lamination shown in Fig. 5 a tooth along the resulting sectional view of A-A;
Fig. 7 is the co-axially fixed schematic diagrames of a plurality of laminations;
Fig. 8 a-8e is the schematic diagram that winds the line in the assembling process;
Fig. 9 is a stator structure schematic diagram according to an embodiment of the invention; And
Figure 10 is the schematic diagram of unitary stator structure in the prior art.
Embodiment
Shown in Fig. 1 is repeatedly the traditional thin thin slice 10 of stator lasmination of thickness rate.This thin slice 10 have ring portion 11 and along the periphery of ring portion with etc. the gear piece 12 that is provided with of angle intervals.Gear piece 12 whole one-tenth T fonts radially have tooth root part 121, tooth body part 122 and increment part 123.Increment part 123 upwards has a cambered surface in week.The configuration of this gear piece 12 can prevent coiling slippage from the tooth.The increment of all teeth of whole thin slice 10 partly limits an imaginary periphery.Preferably, gear piece 12 is one with ring portion 11.As example, shown thin slice 10 has 12 gear pieces.Be provided with a location hole 13 at the tooth root position of each gear piece 12.Alternatively, be provided with a recess 14 at the central part between adjacent two teeth of described ring portion 11 (promptly predetermined hypodontia position), this recess is used to hold the tooth root part of other gear pieces.Can expect, shown thin slice 10 can obtain by such mode: will be similar to thin slice 10 size but having 24 is placed on the device that is used for stamping-out along the periphery of ring portion with the thin slice of the gear piece that waits the setting of angle intervals, tooth root zone punching at each gear piece obtains location hole 13, then every a gear piece ground stamping-out, at last, obtain thin slice shown in Figure 1 10.
As shown in Figure 2, the gear piece 12 ' that is punched down is stacked on the gear piece 12 of the thin slice 10 shown in Fig. 1 can obtain lamination 1.Connection between gear piece 12 ' and the gear piece 12 can realize by traditional methods of attachment such as bonding, riveted or interlocking structures.Complete independent stator tooth 15 of stacked formation of gear piece 12 ' and gear piece 12.Therefore, lamination 1 is made of ring portion 11 and tooth 15.The axial width of tooth 15 is greater than ring portion thickness.Certainly, stator tooth 15 also can be integrated, rather than forms by a plurality of gear pieces are stacked.It may occur to persons skilled in the art that described stator tooth 15 also can be integrated with the ring portion 11 of thin slice 10, for example,, perhaps be connected on the ring portion 11 of described thin slice 10 by interlocking structure by mold formed.In addition, gear piece 12 ' is consistent with the shape of gear piece 12, to keep the alignment of gear piece profile when piling up.
Fig. 3, Fig. 4 illustrate the seal 20 of each tooth 15 that is used for lamination 1 shown in Figure 2.Fig. 5 illustrates the stator lasmination of having installed behind the seal 20 of the present invention.This seal 20 constitutes by the dish 21 that is used to make the insulation of lamination ring portion end face with along the insulating case 22 of the angle spacing setting such as circumferential of this dish 21.Central part between these dish 21 adjacent insulating cases 22 is in periphery and is provided with recess 211, be used for when fitting with the end face for the treatment of insulation processing of lamination and the recess 14 of thin slice 10 corresponding.This insulating case 22 by the recess 221 that limits the concave shaped space that is used to hold tooth 15 substantially and the uncovered cap 222 that is used to cover this recess form.The gear piece 12 that stacks gradually from bottom to top, 12 ' and described recess 221 between can be loose fit or tight fit, preferably, the relative both sides 2211 of described recess 221,2212 clamp gear piece, described cap 222 is fitted in the gear piece 12 ' that is stacked in the top and upward and with described recess 221 is fastened and connected, and forms the insulating case of hollow.The connected mode of the insulating case 22 that passes tooth 15 therein by routine is connected on the ring portion 11 of lamination 1 at these tooth 15 places.Respectively be provided with on the periphery that is used for being resisted against ring portion 11 to guarantee in ring portion relative both sides 2211,2212 and lamination 1 the 11 close ends of recess 221 at the process coiling of lamination coiling and the flange 241,242 of laminated insulation.In the embodiment shown, the bottom side 2213 of the recess 221 of a plurality of insulating cases 22 along circumferential arrangement is connected on the dish 21 or is one-body molded with this dish 21.When the lamination for the treatment of insulation processing is not that this dish 21 can omit when being used to form the end lamination of stator.
Fig. 4 illustrates the cap 222 of insulating case 22.This cap shape is consistent with the gear piece shape.This cap 222 is provided with alignment pin 23 in the position corresponding with the location hole 13 of gear piece 12.This alignment pin 23 is fixed on the side towards tooth 15 of cap 222 by the connected mode of routine.Can expect that alignment pin 23 also can be one-body molded with cap 222.A side that has alignment pin that makes cap 222 after in the recess 221 that tooth 15 is placed on insulating case 22 is to tooth 15 and alignment pin 23 is alignd with location hole 13 in the setting of tooth root portion, then insert alignment pin 23 in the described location hole 13 and described cap 222 is abutted on the upper surface of tooth 15, as shown in Figure 6, thus, make tooth 15 and treat and to insulate around the coiling on the tooth 15.In addition, this insulating case 22 can play the effect of being convenient to alignment assembling gear piece 12,12 '.Certainly, it may occur to persons skilled in the art that other the insulation processing that is used to make tooth and coiling insulation, for example tooth 15 treat coat insulating coating or be pasted with insulating paper with each surface that contacts that winds the line.In one embodiment, alignment pin also can be arranged on the bottom side 2213 of recess 221 of insulating case 22.
Be the assemble method that example is described stator of the present invention with two superimposed formation one complete stators of lamination below.
At first, provide two identical in structure laminations 1 and lamination 1 '.Lamination 1 and lamination 1 ' are fitted together with seal 20 respectively.Afterwards, fix the lamination of handling through insulation 1,1 ', make that the coaxial side that is protruding with tooth fixing and two laminations of two laminations is relative, and two laminations 1, be separated with certain axial distance between between 1 ', as shown in Figure 7 by coiling anchor clamps (not shown).As can be seen from Figure 7, for making described two laminations coaxial,, be nested with about in the of 1 ' on a cylinder lamination 1.
Then, carry out winding process.Before coiling, with the classification of all teeth and be labeled as and belong to phase X, Y, Z (is example with the threephase stator).Referring to Fig. 8 a-8d, from lamination 1 one belongs to tooth 151 beginnings of X phase earlier, be wrapped in a sufficiently long coiling on the partial-length that radially extends of tooth 151 along clockwise direction, behind an intact fixing turn, coiling in the counterclockwise direction on the tooth 151 ' of the correspondence that arrives lamination 1 ', around behind a fixing turn, 2 teeth crossing lamination 1 ' are around to the tooth 152 of lamination 1, behind intact tooth 152, then twine the tooth 152 ' of lamination 1 ' ... so repeatedly, on belonging to the tooth of same phase X, all of all laminations all are wound with the coiling of scheduled volume.In the process of coiling, the cross-line partial L in the coiling be arranged in as far as possible lamination 1 through lower surface that insulation is handled or lamination 1 ' through the upper surface that insulation is handled, to guarantee not exist when lamination 1 and the lamination 1 ' pressing interference of cross-line partial L.Then, the tooth that belongs to phase Y or Z is similarly wound the line respectively.Because in when coiling, it is many that the interval between two laminations has increased twice than the space between the tooth of big a lot of and each lamination of traditional winding space, therefore, and according to the traditional stator structure coiling of the winding ratio of stator structure of the present invention conveniently.In addition, be the mode of continuous cabling owing to what in the coiling process, take, therefore, winding joint significantly reduces.
Then, if the lamination around intact line is that tooth-tooth is relative, then will be around one of lamination that finishes line along predetermined direction rotating certain angle, the projection of each tooth that makes lamination on plane, lamination place down drops on preposition between adjacent two teeth of lamination down, for example make the recesses align between adjacent two teeth on the ring portion of the root portion of each tooth of lamination and following lamination, shown in Fig. 8 d.
It may occur to persons skilled in the art that, also can before coiling, each lamination be fixed on predetermined angular position, make the hypodontia position of each lamination aim in the axial direction with the corresponding tooth of other lamination.
Shown in Fig. 8 e, by the pressing instrument lamination 1 and lamination 1 ' are snapped together, make stacked and two laminations of the ring portion of two laminations tooth ring portion circumferentially on staggered, promptly form a complete stator structure.For making stator attractive in appearance, (not shown) can be tightened up and stopped up to the cross-line partial L on the stator faces.
At last, take off stator 30 after the assembling from the coiling anchor clamps, as shown in Figure 9.
Though only form stator in the example that above provides by two laminations,, it may occur to persons skilled in the art that stator of the present invention is not limited to by two laminations and is formed by stacking, for example, can by 3,4 or more a plurality of lamination be formed by stacking.
For example, when setting the period of the day from 11 p.m. to 1 a.m by three stack of laminations, the thickness of the tooth of each lamination is roughly three times of lamination ring portion thickness h, wherein, the length that the tooth of top lamination extends downwards from the ring portion of the lamination at its place is 2h, the length that the tooth of middle lamination extends respectively up and down from the ring portion of the lamination at its place is h, and the tooth of bottom lamination is 2h from the upwardly extending length of the ring portion of the lamination at its place.At this moment, be reserved with two hypodontia positions between the adjacent teeth of each lamination.According to the number of teeth on the lamination winding mode is set, does not have the cross-line part on the end face of lamination in the middle of making, and all teeth that will belong to same phase with a coiling are around finishing.After belonging to out of phase all teeth coiling and finishing, these three laminations are superimposed, can obtain the stator that transverse tooth thickness is 3h.
Under the situation that is set son by a plurality of stack of laminations, those skilled in the art can change the structure of seal or insulating case according to the needs of assembling and coiling.In addition, the number of teeth of each lamination also is not limited to the number of teeth shown in the figure.The thickness of the ring portion of each lamination, gear piece or tooth, shape also can be made different distortion.
Winding mode shown in Fig. 8 a-8d only is exemplary, and those skilled in the art can make different distortion to winding mode according to structural parameters such as lamination number, the numbers of teeth.
Though shown in the figure is the internal stator structure, the present invention equally also is applicable to outer stator structure.
From foregoing description as can be seen, the stator structure that makes of assemble method according to the present invention has that coiling is convenient, copper factor is high, the few advantage of coiling the end of a thread.Therefore, be specially adapted to wind the line situation into aluminum steel.
Those skilled in the art obviously understand, can make various modifications and variations and can not depart from the scope of the present invention stator structure of the present invention.In view of the practice of this specification and embodiment disclosed herein, other embodiments of the invention are conspicuous to those skilled in the art.It only is exemplary that this specification and example should be regarded as, and true scope of the present invention is defined by the following claims.
Claims (11)
1. assemble method that is used for the stacked stator of motor may further comprise the steps:
A) provide a plurality of laminations, each lamination comprise ring portion with a central axis and along ring portion circumferentially to equate angle apart from a plurality of teeth that are provided with at interval, the number of teeth of each lamination equates;
B) described a plurality of laminations are fixing coaxially successively, make the predetermined axial distance of described a plurality of lamination each interval;
C) on all teeth, twine coiling, make all teeth that belong to same phase of this stator twine by a continuous coiling;
D) described a plurality of laminations are turned to predetermined angular position around common central axis, the described a plurality of laminations of pressing, make that the ring portion of described a plurality of laminations is stacked in the axial direction, and the tooth of described a plurality of laminations circumferentially is crisscross arranged along ring portion, thereby has a tooth of each other lamination between the adjacent teeth of each lamination.
2. assemble method according to claim 1 is characterized in that, step a) is included in the recess of the tooth root part of the tooth that is provided for holding other lamination on the ring portion of each lamination between the circumferential adjacent tooth of this lamination.
3. assemble method according to claim 1 and 2 is characterized in that, step a) comprises that the ring portion of the lamination that makes described tooth and its place is one-body molded.
4. assemble method according to claim 1 and 2 is characterized in that, step a) comprises by superimposed identical shaped a plurality of gear pieces and forms described tooth.
5. assemble method according to claim 4 is characterized in that, described gear piece is by sealed, riveted or the bonding superimposed connection that fixes each other.
6. assemble method according to claim 4 is characterized in that, described gear piece is provided with by the alignment pin alignment.
7. assemble method according to claim 1 is characterized in that, step a) comprises that described tooth is done insulation to be handled.
8. assemble method according to claim 7 is characterized in that, insulating case is installed on the described tooth, makes described tooth remove the tooth root part and tooth ends exceptionally is insulated the cover covering.
9. assemble method according to claim 8 is characterized in that single tooth is formed by stacking by a plurality of gear pieces.
10. assemble method according to claim 9 is characterized in that, the alignment pin of the described a plurality of gear pieces that are provided for aliging on insulating case.
11. assemble method according to claim 1 is characterized in that, the quantity of described lamination is 2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102598841A CN101710765B (en) | 2009-12-16 | 2009-12-16 | Stator assembly method |
| US12/970,336 US8754566B2 (en) | 2009-12-16 | 2010-12-16 | Assembling method for a stator and stator produced thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102598841A CN101710765B (en) | 2009-12-16 | 2009-12-16 | Stator assembly method |
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| Publication Number | Publication Date |
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| CN101710765A CN101710765A (en) | 2010-05-19 |
| CN101710765B true CN101710765B (en) | 2011-09-28 |
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| CN2009102598841A Expired - Fee Related CN101710765B (en) | 2009-12-16 | 2009-12-16 | Stator assembly method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259351A (en) * | 2013-05-13 | 2013-08-21 | 广东威灵电机制造有限公司 | Permanent magnet motor |
| CN103647376B (en) * | 2013-11-20 | 2015-12-30 | 海安先导精密机械有限公司 | Coil winding machine stator coil support |
| CN111036772B (en) * | 2019-12-30 | 2020-09-25 | 扬中普荣电器有限公司 | Stator and stamping die and processing method thereof |
| CN111740555B (en) * | 2020-07-27 | 2023-03-24 | 四川腾邦科技有限公司 | Manufacturing method of magneto stator core |
| CN112510863B (en) * | 2020-11-23 | 2022-01-18 | 珠海格力电器股份有限公司 | Motor core, motor stator, motor and fan |
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