CN104362776B - Prefabricated punching, stator punching and stator - Google Patents
Prefabricated punching, stator punching and stator Download PDFInfo
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- CN104362776B CN104362776B CN201410609352.7A CN201410609352A CN104362776B CN 104362776 B CN104362776 B CN 104362776B CN 201410609352 A CN201410609352 A CN 201410609352A CN 104362776 B CN104362776 B CN 104362776B
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- punching
- prefabricated
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- extension element
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Abstract
The invention discloses a kind of prefabricated punching, stator punching and stator, the prefabricated punching includes the yoke portion of bent camber and is spaced apart the multiple teeth portion for setting, the teeth portion includes tooth boot portion, at least one end of the tooth boot portion is connected with extension element, the end is flexibly connected with the extension element, and the end face of the end is engaged with the mounting surface of the extension element.Prefabricated punching of the invention, the simple structure of prefabricated punching, and when the end end face of tooth boot portion coordinates with the mounting surface of extension element, can effectively lengthen the length of tooth boot portion.When prefabricated punching is applied to stator, the length of tooth boot portion can be increased so that permanent magnet flux linkage can be fully used, so as to improve efficiency on the premise of ensureing winding slot compared with deep (ensureing that the groove area of winding slot is larger).
Description
Technical field
The present invention relates to technical field of motor manufacture, more particularly, to a kind of prefabricated punching, stator punching and stator.
Background technology
Pointed out in correlation technique, in traditional motor stator punching, in order that the utilization rate for obtaining material reaches peak,
Generally using iron core it is double fling then wind by the way of constitute stator structure, however, this there are problems that it is following two:1st, when
When winding slot is very deep, i.e., when groove area is very big, the length very little of tooth boot portion, so that permanent magnet flux linkage can not be obtained
Make full use of, efficiency can not be improved preferably;2nd, when tooth boot portion point is very long, the depth shallower of winding slot, groove area becomes
Small, in the case of same output, copper loss becomes big, efficiency reduction.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.Therefore, one object of the present invention
It is to propose a kind of prefabricated punching, when prefabricated punching is used to manufacture stator punching, increases the length of the tooth boot portion of stator punching
Degree.
It is another object of the present invention to propose a kind of stator enclosed using above-mentioned at least one prefabricated punching
Punching.
Another object of the present invention is to propose a kind of stator with said stator punching.
The prefabricated punching of embodiment according to a first aspect of the present invention, the prefabricated punching includes the yoke portion of bent camber
With multiple teeth portion of setting spaced apart, the teeth portion include tooth boot portion, at least one end of the tooth boot portion is connected with lengthening
Part, the end is flexibly connected with the extension element, and the end face of the end is engaged with the mounting surface of the extension element.
Prefabricated punching according to embodiments of the present invention, the simple structure of prefabricated punching, and when tooth boot portion end end face with
When the mounting surface of extension element coordinates, the length of tooth boot portion can be effectively lengthened.When prefabricated punching is applied to stator, can ensure
On the premise of winding slot is compared with deep (ensureing that the groove area of winding slot is larger), increase the length of tooth boot portion so that permanent magnet flux linkage can
To be fully used, so as to improve efficiency.
Alternatively, the mounting surface of the extension element and plane or curved surface that the end face of the end is mutual cooperation.
Alternatively, the end face of the mounting surface of the extension element and the end is substantially in the angle of predetermined angle, the folder
Angle is less than or equal to 180 degree.
Further, the yoke portion is provided with least one dashpot.
Alternatively, the extension element is located at the lower section of the tooth boot portion.
Alternatively, the draw-in groove and buckle that are respectively arranged at two ends with mutual cooperation in the yoke portion.
Alternatively, the extension element of the prefabricated punching passes through welding, injection or Insulating frame side with the end
Formula is fixed and is connected with each other.
Preferably, each tooth boot portion is respectively arranged at two ends with the extension element.
The stator punching of embodiment according to a second aspect of the present invention, including according to above-mentioned first aspect embodiment of the invention
Prefabricated punching, wherein the stator punching prefabricated punching as described at least one is enclosed and formed.
Stator punching according to embodiments of the present invention, on the premise of winding slot relatively depth is ensured, increases the length of tooth boot portion,
Allow that permanent magnet flux linkage is fully used, so as to improve efficiency.
Alternatively, fixed or draw-in groove snap phase by welding, injection, Insulating frame between the prefabricated punching
Connect.
The stator of embodiment according to a third aspect of the present invention, including according to the stator of above-mentioned second aspect embodiment of the invention
Punching.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein:
Fig. 1 is the schematic diagram of stator punching according to embodiments of the present invention;
Fig. 2 is the enlarged drawing in the A portions that Fig. 1 centre circles show;
Fig. 3 is the schematic diagram of stator punching in accordance with another embodiment of the present invention;
Fig. 4 is the enlarged drawing in the B portions that Fig. 3 centre circles show;
Fig. 5 is the schematic diagram of the prefabricated punching of stator punching according to embodiments of the present invention;
Fig. 6 is the enlarged drawing in the C portions that Fig. 5 centre circles show;
Fig. 7 is according to embodiments of the present invention to stamp out showing for the prefabricated punching of two rows in a prefabricated punching of rectangular patch
It is intended to;
Fig. 8 is the stereogram of multiple prefabricated punching according to embodiments of the present invention;
Fig. 9 is the front view of the prefabricated punching of two rows shown in Fig. 8;
Figure 10 is the schematic diagram that stator punching is manufactured using the prefabricated punching shown in Fig. 9;
Figure 11 is according to embodiments of the present invention to stamp out single prefabricated punching in a prefabricated punching of rectangular patch
Schematic diagram;
Figure 12 and Figure 13 are the assembling process schematic diagrames that stator punching is manufactured using the prefabricated punching shown in Figure 11;
Figure 14 is another schematic diagram that stator punching is manufactured using the prefabricated punching shown in Figure 11.
Reference:
100:Stator punching;
1:Prefabricated punching;11:Yoke portion;111:Draw-in groove;112:Buckle;
113:The first side wall;114:Second sidewall;
115:Dashpot;1151:First buffer part;1152:Second buffer part;1153:Opening;
12:Teeth portion;121:Tooth boot portion;13:Winding slot;
2:Extension element;21:It is raised;3:Fulcrum.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " transverse direction ", " length ", " width ", " thickness ",
" on ", D score, "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " axial direction ", " radial direction ", " circumference " etc.
The orientation or position relationship of instruction are, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and letter
Change description, rather than indicate imply signified device or element must have specific orientation, with specific azimuth configuration and
Operation, therefore be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple " is meant that two
Individual or two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected;Can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two connections of element internal.For this area
For those of ordinary skill, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
Prefabricated punching according to embodiments of the present invention is described below with reference to Fig. 1-Figure 14.
As shown in figure 5, the prefabricated punching of embodiment according to a first aspect of the present invention, including yoke portion 11 and multiple teeth portion 12.
Specifically, reference picture 5, the bent camber in yoke portion 11, the first side wall 113 of the multiple teeth portion 12 in yoke portion 11
It is spaced apart on (for example, the upper side wall in Fig. 5) and is set, now multiple teeth portion 12 is respectively positioned on same on the width in yoke portion 11
Side, and multiple teeth portion 12 are spaced apart setting on the length direction in yoke portion 11, multiple teeth portion 12 are preferably in the length side in yoke portion 11
Upward uniform intervals distribution.
Teeth portion 12 includes tooth boot portion 121, and one end (for example, the upper end in Fig. 5) away from yoke portion 11 of each teeth portion 12 sets
There is tooth boot portion 121, the left and right two ends of each tooth boot portion 121 are extended to beyond corresponding teeth portion along the length direction in yoke portion 11 respectively
Two side walls on 12 width, now the length of each tooth boot portion 121 more than corresponding teeth portion 12 width.Thus,
Can prevent stator winding from deviating from from winding slot 13.
At least one end (for example, at least one end in Fig. 5 in the left and right two ends of tooth boot portion 121) of tooth boot portion 121 is even
Extension element 2 is connected to, so as to increase the length of tooth boot portion 121.The end of tooth boot portion 121 is flexibly connected with extension element 2, and end
End face be engaged with the mounting surface of extension element 2.Extension element 2 is located at the lower section of tooth boot portion 121.
Preferably, the two ends of each tooth boot portion 121 are equipped with extension element 2, and two extension elements 2 on tooth boot portion 121
Center is symmetrical.
Prefabricated punching according to embodiments of the present invention, the simple structure of prefabricated punching, and when the end end face of tooth boot portion 121
When mounting surface with extension element 2 coordinates, the length of tooth boot portion 121 can be effectively lengthened.When prefabricated punching is applied to stator, can
On the premise of ensureing winding slot 13 compared with deep (ensureing that the groove area of winding slot 13 is larger), increase the length of tooth boot portion 121, make
Obtaining permanent magnet flux linkage can be fully used, so as to improve efficiency.Additionally, in the extension element 2 formed below of tooth boot portion 121, both
It is that extension element 2 is formed in winding slot 13, the material in winding slot 13 can be made full use of, so as to improve stock utilization.
Alternatively, the mounting surface of extension element 2 and plane or curved surface that the end face of the end of tooth boot portion 121 is mutual cooperation.
When the mounting surface of extension element 2 is the plane for cooperating with the end face of the end of tooth boot portion 121 so that prefabricated punching processing letter
List and low cost.When the mounting surface of extension element 2 is the curved surface for cooperating with the end face of the end of tooth boot portion 121, Ke Yiyou
Effect ensures the fixing connected between extension element 2 and tooth boot portion 121.
Wherein, the end face of the end of the mounting surface of extension element 2 and tooth boot portion 121 is substantially in the angle of predetermined angle, angle
Less than or equal to 180 degree.
For example, when stator punching 100 is silicon steel sheet, it is contemplated that silicon steel sheet is more crisp, in tooth boot portion 121 and can lengthen
The coupling part of part 2 is done and is optimized, and for example, referring to Fig. 3 and combines Fig. 4, along stator punching 100 radial direction from inside to outside, each
One end end face contacted with corresponding tooth boot portion 121 of extension element 2 is configured to inclined-plane, now the mounting surface and tooth of extension element 2
Angle between the end face of the end in boots portion 121 is less than 180 degree, can make when extension element 2 is installed, the anglec of rotation of extension element 2
It is smaller, therefore be more convenient for installing.
Alternatively, scarf turns into tapered plane or skew surface (for example, tiltedly cambered surface or oblique wavy surface).It is appreciated that inclined-plane
Concrete shape can be according to actual requirement specific design, preferably to meet actual requirement.
Preferably, each both sides of extension element 2 on the width in yoke portion 11 is respectively with corresponding tooth boot portion 121 in yoke
Both sides on the width in portion 11 are concordant.As shown in Figure 2 and Figure 4, a side surface in the neighbouring yoke portion 11 of tooth boot portion 121 is formed
It is plane, the side surface away from yoke portion 11 of tooth boot portion 121 is formed towards the cambered surface of the direction protrusion away from yoke portion 11, phase
Ying Di a, side surface in the neighbouring yoke portion 11 of extension element 2 is formed as the side flush with the neighbouring yoke portion 11 of tooth boot portion 121
Plane, the side surface away from yoke portion 11 of extension element 2 is formed as the side arcing surface away from yoke portion 11 with tooth boot portion 121
Degree identical cambered surface.
Further, yoke portion 11 is provided with least one dashpot 115.Reference picture 5 and Fig. 7, are formed with prefabricated punching 1
At least one dashpot 115, each dashpot 115 runs through prefabricated punching 1, and dashpot on the thickness direction of prefabricated punching 1
115 opening 1153 is located in the second sidewall 114 relative with the first side wall 113 of prefabricated punching 1.In other words, the first side wall
113 and second sidewall 114 be oppositely arranged, the opening 1153 of dashpot 115 is located in second sidewall 114, dashpot 115 from second
Side wall 114 is recessed towards the first side wall 113 and runs through yoke portion 11 in a thickness direction.Thus, by setting dashpot 115, can
To buffer the metal tension force that yoke portion 11 produces during bending, the deflection of prefabricated punching 1 is reduced.
Alternatively, the number of dashpot 115 is six, and six dashpots 115 are uniform on the length direction in yoke portion 11
It is spaced apart.Such that it is able to the metal tension force that further buffering yoke portion 11 produces during bending.It is appreciated that dashpot
115 number not limited to this, the number of dashpot 115 can be defined according to actual conditions.
Specifically, each dashpot 115 includes the first buffer part 1151 and the second buffer part 1152 that are connected with each other, the
One buffer part 1151 is circular hole, and the second buffer part 1152 is formed extend to the strip of the second sidewall 114 of prefabricated punching 1
Passage, the bending of the second buffer part 1152 extends, and the distance between opposing sidewalls of passage maximum is less than the first buffer part 1151
Diameter.So as on the basis of the buffering effect for ensureing dashpot 115, be easy to the machine-shaping of dashpot 115.Certainly, delay
Jet-bedding 115 may be formed as other shapes, as long as the metal tension force that buffering yoke portion 11 produces during bending can be played
.
Alternatively, the draw-in groove 111 and buckle 112 that are respectively arranged at two ends with mutual cooperation in yoke portion 11.Of the invention one
Individual alternative embodiment, forms fluted in one of them in tooth boot portion 121 and extension element 2, in tooth boot portion 121 and extension element 2
Another be provided with groove fit raised 21.Here following two situations are included:Firstth, groove is formed in tooth boot portion
On 121, raised 21 are located on extension element 2;Secondth, groove is formed on extension element 2, and raised 21 are located in tooth boot portion 121.
Reference picture 1 and Fig. 3 and combination Fig. 2 and Fig. 4, groove are formed in the end of tooth boot portion 121, and raised 21 are located at extension element
The side at 2 center of neighbouring corresponding tooth boot portion 121.Thus, during installation, can be by the raised 21 insertion correspondence on extension element 2
Tooth boot portion 121 groove in.Specifically, the one end (for example, the right-hand member in Fig. 5) in yoke portion 11 is formed with draw-in groove 111 and yoke
The other end (for example, the left end in Fig. 5) in portion 11 is provided with the buckle 112 coordinated with draw-in groove 111, now buckle 112 and draw-in groove 111
The two ends on the length direction in yoke portion 11 are located at respectively.Now, stator punching 100 can be spliced by least one prefabricated punching 1
Form.
Certainly, the extension element 2 of prefabricated punching can also be by welding, injection or insulation frame with the end of tooth boot portion 121
Frame mode fixes interconnection.Wherein, Insulating frame has been well known to those skilled in the art, and is not detailed herein.
It is appreciated that the specific connected mode of prefabricated punching 1 can according to actual requirement adaptive change, the present invention do not make spy to this
It is different to limit.
As shown in figures 1 and 3, the stator punching 100 of embodiment according to a second aspect of the present invention, including according in the present invention
State the prefabricated punching 1 of first aspect embodiment.Wherein, stator punching 100 is enclosed by least one prefabricated punching 1 and formed.
Alternatively, can be fixed or draw-in groove snap phase by welding, injection, Insulating frame between prefabricated punching
Connect.For example, as shown in figures 1 and 3, stator punching 100 can be by least one prefabricated punching 1 by buckle 112 and card
The cooperation of groove 111 is spliced.For example, when stator punching 100 is spliced by a prefabricated punching 1 with multiple stator tooths
When, the prefabricated punching 1 is bent into camber and so that the draw-in groove 111 and buckle 112 at two ends coordinate to be spliced into an annular
Stator punching 100.
On stator punching 100, per limiting a winding slot 13 between two adjacent stator tooths, the stator of motor around
Group is adapted to pass through winding slot 13 and winds on the stator teeth.Reference picture 1 and Fig. 3, the winding slot 13 of the stator punching 100 of annular can
It is external rotor electric machine using the motor of the stator punching 100 correspondingly with periphery wall.Certainly, the stator punching of annular
The winding slot 13 of piece 100 may be located on internal perisporium, be inner rotor motor using the motor of the stator punching 100 correspondingly.
When stator punching 100 is spliced by two prefabricated punchings 1 respectively with multiple stator tooths, can be by wherein
One buckle of prefabricated punching 1 112 and draw-in groove 111 coordinate with the draw-in groove 111 and buckle 112 of another prefabricated punching 1 respectively with
A stator punching for annular 100 is spliced into, by that analogy, when stator punching 100 is had respectively by three and more than three
When the prefabricated punching 1 of multiple stator tooths is spliced, can by the prefabricated punching 1 of three or more than three successively head and the tail coordinate with
It is spliced into a stator punching for annular 100.It is appreciated that can be by selecting the number of different prefabricated punchings 1, splicing
Different-diameter, the annular stator punching 100 of different series needed for going out.
Stator can fling structure using double, and specifically, the processing method for making stator punching 100 is as follows:Such as Fig. 7
Shown and combination Fig. 9 and Figure 10, first, is stamped and formed out double separable using mould in the every prefabricated punching of rectangular patch
Stator tooth slot structure, wherein the prefabricated punching of multi-disc rectangular patch can be stacked, it is then using mould that multi-disc rectangular patch is pre-
Punching processed is one time punching molded (as shown in Figure 8).The sub- tooth slot structure that is often ranked limits one has the prefabricated of multiple teeth portion 12
Punching 1, is ranked between sub- tooth slot structure not preset clearance, then using the mould that machining accuracy is high if necessary to two.Certainly, if
Needing two to be ranked has certain gap between sub- tooth slot structure, then using the mould that machining accuracy is relatively low, due to die cutter
Influence, the thickness (not shown) of the size in the gap not less than tooling blade.Certainly, stator can also be flung using single
Structure, as shown in figures 11-14.
Then one or more prefabricated punchings 1 are joined end to end to be spliced into stator punching 100.Wherein in order to improve splicing
The structural strength of the stator punching 100 for going out, can be at the cooperation of buckle 112 and draw-in groove 111 using welding and/or the side of injection
Formula is reinforced.
It is spliced into by with buckle 112 and draw-in groove 111 from one or more prefabricated punchings 1, consequently facilitating stator
The machine-shaping of punching 100, improves the processing efficiency of stator punching 100, while the prefabricated punching 1 by selecting varying number,
The demand of the motor of different seat No. can be met, R&D costs are reduced, significantly shorten the research and development time.
Wherein, stator punching 100 can be distinguished in the lower section at the left and right two ends of tooth boot portion 121 in advance in punching course
An extension element 2 is reserved, wherein each extension element 2 is connected by fulcrum 3 with tooth boot portion 121, fulcrum 3 is located at tooth boot portion respectively
The bottom at 121 left and right two ends, as shown in Figure 5 and Figure 6.After the completion of punching press, extension element 2 is rotated 180 ° so that extension element 2
Side is parallel to each other with the respective end of tooth boot portion 121, thus, increases the length of tooth boot portion 121.It is of course also possible to individually
Extension element 2 is gone out, then tooth boot portion 121 (not shown) is connected to by way of injection etc..
Thus, while the groove area for ensureing winding slot 13 is sufficiently large, the length of tooth boot portion 121 is increased, it becomes possible to carry
Rise efficiency.Because, it is ensured that groove area is sufficiently large, it becomes possible to ensure copper loss than relatively low.And increase the length of tooth boot portion 121, can be with
Permanent magnet flux linkage is more fully utilized, so in the case of identical output, reduces input current, so that reduce copper loss, and energy
Enough raising efficiencies to a certain extent.
Stator punching 100 according to embodiments of the present invention, (can ensure the groove of winding slot 13 ensureing that winding slot 13 is relatively deep
Area is larger) on the premise of, increase the length of tooth boot portion 121 so that permanent magnet flux linkage can be fully used, so as to improve
Efficiency.
The stator (not shown) of embodiment according to a third aspect of the present invention, including according to above-mentioned second aspect reality of the invention
Apply the stator punching 100 of example.Wherein, stator can be formed by multiple stator punchings 100 are stacked.It is appreciated that stator punching 100
Number can be according to actual conditions depending on.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example are described
Structure, material or feature are contained at least one embodiment of the invention or example.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or spy
Point can in an appropriate manner be combined in one or more any embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that:Not
Can these embodiments be carried out with various changes, modification, replacement and modification in the case of departing from principle of the invention and objective, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of prefabricated punching, it is characterised in that the prefabricated punching includes the yoke portion of bent camber and is spaced apart setting
Multiple teeth portion, the teeth portion includes tooth boot portion, and at least one end of the tooth boot portion is connected with extension element, the end with
The extension element is flexibly connected, and the end face of the end is engaged with the mounting surface of the extension element, the peace of the extension element
Dress face is less than or equal to 180 degree with the angle that the end face of the end of the tooth boot portion is in predetermined angle, the angle.
2. prefabricated punching according to claim 1, it is characterised in that the end of the mounting surface of the extension element and the end
Face is the plane or curved surface for cooperating.
3. prefabricated punching according to claim 1, it is characterised in that the yoke portion is provided with least one dashpot.
4. prefabricated punching according to claim 1, it is characterised in that the extension element is located at the lower section of the tooth boot portion.
5. prefabricated punching according to claim 1, it is characterised in that the yoke portion is respectively arranged at two ends with mutual cooperation
Draw-in groove and buckle.
6. prefabricated punching according to claim 1, it is characterised in that the extension element of the prefabricated punching and the end
Portion is connected with each other by welding, injection or Insulating frame fixed form.
7. prefabricated punching according to claim 1, it is characterised in that being respectively arranged at two ends with for each tooth boot portion is described
Extension element.
8. a kind of stator punching, it is characterised in that including the prefabricated punching according to any one of claim 1-7, wherein
The stator punching prefabricated punching as described at least one is enclosed and formed.
9. stator punching according to claim 8, it is characterised in that by welding, injection, absolutely between the prefabricated punching
Edge framework is fixed or draw-in groove snap is connected with each other.
10. a kind of stator, it is characterised in that including stator punching according to claim 8 or claim 9.
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CN104753205B (en) * | 2015-04-22 | 2017-05-31 | 广东威灵电机制造有限公司 | Prefabricated stator punching and the stator punching with it, Stator and electrical machine |
CN104753204B (en) * | 2015-04-22 | 2017-06-27 | 广东威灵电机制造有限公司 | Prefabricated stator punching and the stator punching with it, Stator and electrical machine |
CN104753198B (en) * | 2015-04-22 | 2017-10-27 | 广东威灵电机制造有限公司 | Prefabricated stator punching and stator punching, stator and motor with it |
CN104753203B (en) * | 2015-04-22 | 2017-05-31 | 广东威灵电机制造有限公司 | Prefabricated stator punching, stator punching, Stator and electrical machine |
CN106712325B (en) * | 2016-12-15 | 2019-03-01 | 广东威灵电机制造有限公司 | Stator and motor with it |
CN106849400B (en) * | 2016-12-15 | 2019-03-01 | 广东威灵电机制造有限公司 | Stator core, Stator and electrical machine |
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KR20080078944A (en) * | 2007-02-26 | 2008-08-29 | 엘지전자 주식회사 | Motor core and manufacturing method for the same |
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CN101572446A (en) * | 2008-04-30 | 2009-11-04 | 乐金电子(天津)电器有限公司 | Motor |
CN102959833A (en) * | 2010-06-25 | 2013-03-06 | 三菱电机株式会社 | Laminated core for dynamo-electric machine |
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