CN106130204A - Motor, stator core and stator punching thereof - Google Patents

Motor, stator core and stator punching thereof Download PDF

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Publication number
CN106130204A
CN106130204A CN201610579612.XA CN201610579612A CN106130204A CN 106130204 A CN106130204 A CN 106130204A CN 201610579612 A CN201610579612 A CN 201610579612A CN 106130204 A CN106130204 A CN 106130204A
Authority
CN
China
Prior art keywords
stator
curved surfaces
punching
tooth
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610579612.XA
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Chinese (zh)
Other versions
CN106130204B (en
Inventor
黄耀鹏
李尚平
范少稳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Zhuhai Landa Compressor Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Zhuhai Landa Compressor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai, Zhuhai Landa Compressor Co Ltd filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201610579612.XA priority Critical patent/CN106130204B/en
Publication of CN106130204A publication Critical patent/CN106130204A/en
Application granted granted Critical
Publication of CN106130204B publication Critical patent/CN106130204B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information

Abstract

The invention provides a kind of stator punching, including punching body, described punching body has the through hole of the hollow of the rotor for installing motor;On the inner surface of described punching body, the circumferential direction along described stator punching is evenly distributed with multiple stator tooth, and each described stator tooth extends along the radial direction of described stator punching;Described stator tooth is curved surfaces towards the surface of described through hole, and described curved surfaces is directed away from described through hole depression.After rotor is installed in the through hole of stator punching, the stator tooth with curved surfaces can increase the length of the air gap between stator core and rotor, and then increase effective air gap length when motor runs, the air gap flux density high-frequency harmonic content making motor has certain reduction, improve electromagnetic power conversion and i.e. improve the efficiency of motor, and then reduction stator core loss, and reduce noise.Present invention also offers a kind of motor and stator core thereof.

Description

Motor, stator core and stator punching thereof
Technical field
The present invention relates to motor device technical field, particularly relate to a kind of motor, stator core and stator punching thereof.
Background technology
Along with market development, invariable frequency compressor motor steps up for efficient requirement.From design of electrical motor angle From the point of view of on, the size of stator cogging torque will affect harmonic content and the core loss of air gap flux density.At present, single-phase fixed frequency electricity The improved efficiency amplitude of machine is difficulty with the lifting of a more than point in the case of considering specification and cost substantially, and analytical plan is sent out Existing conventional single-phase frequency electric machine iron core air gap flux density harmonic content in determined circumstances surely is bigger, and teeth groove harmonic wave occupies mainly Factor, and then core loss and the noise of motor can be directly affected.
Summary of the invention
Based on this, it is necessary to for current single-phase fixed frequency electric machine iron core air gap flux density harmonic content in determined circumstances Bigger problem, it is provided that a kind of air gap flux density harmonic content of motor, stator punching of reduction iron loss of can reducing, also simultaneously Provide a kind of stator core containing said stator punching, and the motor containing said stator iron core.
Above-mentioned purpose is achieved through the following technical solutions:
A kind of stator punching, including punching body, described punching body has the hollow of the rotor for installing motor Through hole;
On the inner surface of described punching body, the circumferential direction along described stator punching is evenly distributed with multiple stator Tooth, each described stator tooth extends along the radial direction of described stator punching;
Described stator tooth is curved surfaces towards the surface of described through hole, and described curved surfaces is directed away from described logical Cave at hole.
Wherein in an embodiment, the arc radius of described curved surfaces is less than the radius of described rotor.
Wherein in an embodiment, described stator tooth has tooth crest and the tooth root arranged relative to described tooth crest Portion;
Described root portion is near described through hole, and described tooth crest is arranged away from described through hole;
Described curved surfaces is positioned at described root portion towards on the surface of described through hole;
Described root portion has the first end and the second end relative to described first end;
Described curved surfaces extends to described second end from described first end.
Wherein in an embodiment, the quantity of described curved surfaces is one, and described curved surfaces is about described stator The axis of tooth is symmetrical.
Wherein in an embodiment, the arc radius of described curved surfaces be 0.35 times of the radius of described rotor~ 0.8 times.
Wherein in an embodiment, it is two continuous print arc tables that described root portion is positioned at the surface of described through hole Face, the arc radius of curved surfaces described in two continuous print is equal;
And curved surfaces described in two continuous print is symmetrical about the axis of described stator tooth.
Wherein in an embodiment, the arc radius of described curved surfaces be 0.15 times of the radius of described rotor~ 0.35 times.
Wherein in an embodiment, each described stator tooth is respectively provided with curved surfaces.
Wherein in an embodiment, the described stator tooth of part arranges curved surfaces;
And there is the described stator tooth of curved surfaces be symmetrical arranged about the diameter line of described stator punching.
Wherein in an embodiment, arc transition between outer peripheral face and the described curved surfaces of described root portion.
Wherein in an embodiment, the radius of described circular arc is 0.05mm~0.5mm.
Further relate to a kind of stator core, by multiple stator punchings as described in any of the above-described technical characteristic stacking lamination Become.
Further relate to a kind of motor, including rotor and the stator core as described in above-mentioned technical characteristic;Described rotor is installed on In described stator core.
The invention has the beneficial effects as follows:
The motor of the present invention, stator core and stator punching thereof, structure design advantages of simple, by optimizing the end of stator tooth The shape in portion so that the surface of the end of stator tooth is curved surfaces.After rotor is installed in the through hole of stator punching, there is arc The stator tooth on shape surface can increase the length of the air gap between stator core and rotor, so increase when motor runs effective Gas length so that the air gap flux density high-frequency harmonic content of motor has certain reduction, improves electromagnetic power conversion and i.e. improves electricity The efficiency of machine, and then reduce stator core loss, and reduce noise to a certain extent.The stator punching of the present invention is by optimizing The structure of stator tooth make the curved surface, end of stator tooth to increase the length of air gap, and then reduce loss and reduce humorous The purpose of ripple content.
Accompanying drawing explanation
Fig. 1 is the front view of the stator punching of one embodiment of the invention;
Fig. 2 is the partial enlarged drawing at the A shown in Fig. 1;
Fig. 3 is that the stator punching of the present invention uses finite element to carry out the schematic diagram of air gap flux density frequency analysis;
Fig. 4 is that current stator punching uses finite element to carry out the schematic diagram of air gap flux density frequency analysis;
Fig. 5 is that the stator punching of the present invention uses finite element to carry out the contrast signal of core loss with current stator punching Figure;
Wherein:
100-stator punching;
110-punching body;
120-through hole;
130-stator tooth;
131-tooth crest;
132-root portion;
1321-curved surfaces;1322-the first end;1323-the second end;
133-tooth body.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, by the following examples, and combine attached Figure, is further elaborated to motor, stator core and the stator punching thereof of the present invention.Should be appreciated that described herein Specific embodiment only in order to explain the present invention, be not intended to limit the present invention.
See Fig. 1 to Fig. 2, the invention provides a kind of stator punching 100, these stator punching 100 stack layer pressure energies multiple Enough form stator core, and match with rotor.The stator punching 100 of the present invention can by the structure optimizing stator tooth 130 Increase the gas length between stator core and rotor, air gap flux density harmonic content is effectively ensured, then reduces stator iron loss, carry High electric efficiency.
In the present invention, stator punching 100 includes that punching body 110, punching body 110 have for installing turning of motor The through hole 120 of the hollow of son.On the inner surface of punching body 110, the circumferential direction along stator punching 100 is evenly distributed with many Individual stator tooth 130, forms a teeth groove between two adjacent stator tooths 130, each stator tooth 130 is along stator punching 100 Radial direction extends.Stator tooth 130 is curved surfaces 1321 towards the surface at through hole 120, and curved surfaces 1321 is towards far Cave in away from through hole 120.
It is to say, the surface of the end of stator tooth 130 is curved surfaces 1321, and the recess court of curved surfaces 1321 To through hole 120.So, after rotor is installed in the through hole 120 of stator punching 100, the central region of curved surfaces 1321 is to turning Distance between the outer surface of son more than the edge of curved surfaces 1321 to the distance between the outer surface of rotor.There is arc table The stator tooth 130 in face 1321 can increase the gas length of stator punching 100 and rotor, and then increases air gap when motor runs Effective length, improves electromagnetic power and i.e. improves electric efficiency, reduce iron loss.
At present, the stator tooth of stator core is that the surface of the end of parallel teeth, i.e. stator tooth is equal with the outer surface of rotor OK.In this case, air gap flux density harmonic content is bigger, and teeth groove harmonic wave occupies principal element, and then can directly affect electricity The core loss of machine and noise.Therefore, the stator punching 100 of the present invention is by optimizing the shape of stator tooth 130 so that stator tooth The surface of the end of 130 be the stator tooth 130 of the stator punching 100 of curved surfaces 1321, the i.e. present invention be arc-shaped gear.By tool There is the stator tooth 130 of curved surfaces 1321 to increase the gas length between stator punching 100 and rotor, then increase air gap magnetic Amount, improves electric efficiency.
The stator punching 100 of the present invention is by optimizing the shape of the end of stator tooth 130 so that the end of stator tooth 130 Surface be curved surfaces 1321.After rotor is installed in the through hole 120 of stator punching 100, there is determining of curved surfaces 1321 Sub-tooth 130 can increase the length of the air gap between stator core and rotor, and then it is long to increase effective air gap when motor runs Degree so that the air gap flux density high-frequency harmonic content of motor has certain reduction, improves electromagnetic power conversion and i.e. improves the effect of motor Rate, and then reduce stator core loss, and reduce noise to a certain extent.The stator punching 100 of the present invention is fixed by optimizing The structure of sub-tooth 130 makes the curved surface, end 1321 of stator tooth 130 to increase the length of air gap, and then reduces loss With the purpose reducing harmonic content.
As a kind of embodiment, the arc radius of curved surfaces 1321 is less than the radius of rotor.It is to say, arc The degree of crook on surface 1321 is more than the degree of crook of the outer surface of rotor, in such manner, it is possible to make the end of stator tooth 130 to turning The distance of the outer surface of son changes, and increases air gap degree, then increases magnetic flux, improves electromagnetic conversion efficiency, it is ensured that electricity Engine efficiency.
As a kind of embodiment, stator tooth 130 has tooth crest 131, the root portion arranged relative to tooth crest 131 132 and connect the tooth body 133 of tooth crest 131 and root portion 132.Root portion 132 at through hole 120, tooth crest 131 away from Through hole 120 is arranged.Curved surfaces 1321 is positioned at root portion 132 towards on the surface at through hole 120.Further, root portion 132 There is the first end 1322 and the second end 1323 relative to the first end 1322.Curved surfaces 1321 extends to from the first end 1322 Two ends 1323.The stator punching 100 of the present invention arranges curved surfaces 1321 on the root portion 132 of stator tooth 130, to increase electricity Air gap effective length when machine runs, improves electromagnetic power conversion and i.e. improves electric efficiency.
First end 1322 is equal to second end 1323 distance to the outer surface of rotor to the distance of the outer surface of rotor, and First end 1322 to the distance of the outer surface of rotor less than the central region of curved surfaces 1321 between the outer surface of rotor Distance, so can increase gas length, effectively reduces air gap flux density harmonic content, and then reduces iron loss.
Owing to the stator punching 100 of the present invention passes through the curved surfaces 1321 of the root portion 132 of stator tooth 130 to motor tooth Groove torque has certain optimization function, to reduce high frequency time air gap flux density harmonic content.But, it is considered to actual process and nail punch The slab organization of sheet, the lifting of electric efficiency not with the arc radius of the curved surfaces 1321 of the root portion 132 of stator tooth 130 Or hollow depth is always directly proportional.When the hollow depth of the curved surfaces 1321 of the root portion 132 of stator tooth 130 is excessive, then The magnetic flux that can cause stator tooth 130 reduces, and affects electromagnetic conversion efficiency, the most also can diminish groove height, and then lead The technique causing stator punching 100 makes structural damage increase.
Therefore, the stator punching 100 of the present invention still uses original in order to avoid technique makes structural damage increase The height of the teeth groove of stator punching 100.Further, curved surfaces 1321 on the stator tooth 130 of the stator punching 100 of the present invention Quantity can be one, it is also possible to is two.It is described as follows:
In one embodiment of the present invention, the quantity of curved surfaces 1321 is one, and curved surfaces 1321 is about stator The axis of tooth 130 is symmetrical.So ensure that the curved surfaces 1321 of both sides, axis between the outer surface of rotor away from From equal, and then ensure gas length, effectively reduce air gap flux density harmonic content, and then reduce iron loss.Further, arc table The arc radius in face 1321 is 0.35 times~0.8 times of the radius of rotor.In such manner, it is possible to ensure the indent journey of curved surfaces 1321 Degree, it is to avoid curved surfaces 1321 transition indent, it is ensured that the magnetic flux of stator tooth 130, it is ensured that the efficiency of motor.
The stator punching 100 of the present invention illustrates as a example by coordinating the radius rotor as 26mm.It is to say, rotor Radius is 26mm, and the arc radius of corresponding curved surfaces 1321 is 10mm~20mm, preferably 10mm~13mm.The present invention's In one embodiment, the quantity of the curved surfaces 1321 on stator tooth 130 on stator punching 100 is one, and curved surfaces The arc radius of 1321 is 10mm.So ensure that gas length, effectively reduce air gap flux density harmonic content, and then reduce ferrum Damage.
In other embodiments of the present invention, it is two continuous print arcs that root portion 132 is positioned at the surface at through hole 120 Surface 1321, the arc radius of two continuous print curved surfaces 1321 is equal.And two continuous print curved surfaces 1321 are about fixed The axis of sub-tooth 130 is symmetrical.So ensure that the curved surfaces 1321 of both sides, axis is between the outer surface of rotor Apart from equal, and then ensure gas length, effectively reduce air gap flux density harmonic content, and then reduce iron loss.Further, arc The arc radius on surface 1321 is 0.15 times~0.35 times of the radius of rotor.In such manner, it is possible to ensure the interior of curved surfaces 1321 Recessed degree, it is to avoid curved surfaces 1321 transition indent, it is ensured that the magnetic flux of stator tooth 130, it is ensured that the efficiency of motor.
Further, the intersection of two curved surfaces 1321 tapers off to a point, and the distance of the most advanced and sophisticated outer surface to rotor is more than the One end 1322 and the second end 1323 arrive the distance of the outer surface of rotor.The stator punching 100 of the present invention is to coordinate radius as 26mm Rotor as a example by illustrate.It is to say, the radius of rotor is 26mm, the arc radius of corresponding curved surfaces 1321 is 4mm~8mm, preferably 5mm.In another embodiment of the invention, the curved surfaces on the stator tooth 130 on stator punching 100 The quantity of 1321 be two each and every one, and the arc radius of curved surfaces 1321 is 5mm.So ensure that gas length, effectively drop Low air gap flux density harmonic content, and then reduce iron loss.
It should be noted that the quantity of the curved surfaces 1321 of the stator tooth 130 of the stator punching 100 of the present invention is one Or when two, the air gap flux density harmonic content of the stator punching 100 that can solve the present invention relatively big so that affect iron loss and The problem of noise.Owing to each two curved surfaces 1321 is crossed to form tip, but, the quantity of curved surfaces 1321 be three and When more than three, most advanced and sophisticated quantity will increase, and can deteriorate cogging torque, and then increase air gap flux density harmonic content, impact electricity The core loss of machine and noise.Therefore, the quantity of the curved surfaces 1321 of the stator tooth 130 of the stator punching 100 of the present invention is One or two time ensure that air gap flux density harmonic content is relatively low, and then ensure motor iron loss, reduce noise.
As a kind of embodiment, each stator tooth 130 is respectively provided with curved surfaces 1321.It is to say, stator punching It is respectively provided with curved surfaces 1321 on all of stator tooth 130 on sheet 100, so ensure that the effective of air gap when motor runs Length, improves electromagnetic power conversion and i.e. improves electric efficiency, reduce core loss.
Certainly, in other embodiments of the present invention, partial stator tooth 130 arranges curved surfaces 1321, and has The stator tooth 130 of curved surfaces 1321 is symmetrical arranged about the diameter line of stator punching 100.If it is to say, stator punching 100 When being 24 groove structure, curved surfaces 1321 can be set, at these arc tables on three or more stator tooth 130 wherein It is also provided with curved surfaces 1321, to ensure gas when motor runs on the symmetrically arranged stator tooth of stator tooth 130 130 in face 1321 The effective length of gap, improves electromagnetic power conversion and i.e. improves electric efficiency, reduce core loss.
As a kind of embodiment, arc transition between outer peripheral face and the curved surfaces 1321 of root portion 132.So energy Enough gas lengths that increases to a certain extent, the structure of optimization teeth groove so that the torque of teeth groove reduces, and then reduce iron loss and subtract Few air gap flux density harmonic content.Further, the radius of circular arc is 0.05mm~0.5mm.
Further, see Fig. 3 to Fig. 5, the present invention is had the stator punching 100 of curved surfaces 1321 and current having The stator punching of parallel teeth carries out finite element analysis, carries out air gap flux density harmonic wave finite element analysis and core loss finite element respectively Contrast.Stator tooth 130 in note the application is arc-shaped gear, and current stator tooth is parallel rule.Comparison diagram 3 and Fig. 4, can be obvious Finding out, the stator punching 100 of the present invention can reduce air gap flux density harmonic wave by curved surfaces 1321;Can be obvious from Fig. 5 Finding out, the stator punching 100 of the present invention can reduce iron loss by curved surfaces 1321.
Present invention also offers a kind of stator core, the stator punching 100 in multiple above-described embodiments stack lamination and Become.The stator core of the present invention ensures gas length by having the stator punching 100 of curved surfaces 1321, reduces air gap magnetic Close harmonic content, reduces iron loss then.
Present invention also offers a kind of motor, including the stator core in rotor and above-described embodiment, rotor is installed on fixed In sub-iron core.The motor of the present invention ensures motor by the stator punching 100 with curved surfaces 1321 in stator core Air gap effective length during operation, improves electromagnetic power conversion and i.e. improves electric efficiency, reduce core loss, reduce noise.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (13)

1. a stator punching, it is characterised in that include that punching body (110), described punching body (110) have for installing The through hole (120) of the hollow of the rotor of motor;
On the inner surface of described punching body (110), the circumferential direction along described stator punching (100) is evenly distributed with multiple Stator tooth (130), each described stator tooth (130) extends along the radial direction of described stator punching (100);
Described stator tooth (130) is curved surfaces (1321) towards the surface at described through hole (120) place, and described curved surfaces (1321) described through hole (120) place depression it is directed away from.
Stator punching the most according to claim 1, it is characterised in that the arc radius of described curved surfaces (1321) is less than The radius of described rotor.
Stator punching the most according to claim 2, it is characterised in that described stator tooth (130) have tooth crest (131) and The root portion (132) arranged relative to described tooth crest (131);
Described root portion (132) is near described through hole (120) place, and described tooth crest (131) is arranged away from described through hole (120);
Described curved surfaces (1321) is positioned at described root portion (132) towards on the surface at described through hole (120) place;
Described root portion (132) has the first end (1322) and the second end (1323) relative to described first end (1322);
Described curved surfaces (1321) extends to described second end (1323) from described first end (1322).
Stator punching the most according to claim 3, it is characterised in that the quantity of described curved surfaces (1321) is one, Described curved surfaces (1321) is symmetrical about the axis of described stator tooth (130).
Stator punching the most according to claim 4, it is characterised in that the arc radius of described curved surfaces (1321) is institute State 0.35 times~0.8 times of radius of rotor.
Stator punching the most according to claim 3, it is characterised in that described root portion (132) is positioned at described through hole (120) The surface at place is two continuous print curved surfaces (1321), the arc radius phase of curved surfaces (1321) described in two continuous print Deng;
And curved surfaces (1321) described in two continuous print is symmetrical about the axis of described stator tooth (130).
Stator punching the most according to claim 6, it is characterised in that the arc radius of described curved surfaces (1321) is institute State 0.15 times~0.35 times of radius of rotor.
8. according to the stator punching described in any one of claim 4 to 7, it is characterised in that each described stator tooth (130) is upper all Curved surfaces (1321) is set.
9. according to the stator punching described in any one of claim 4 to 7, it is characterised in that set in the described stator tooth of part (130) Put curved surfaces (1321);
And there is the described stator tooth (130) of curved surfaces (1321) set about the diameter line symmetry of described stator punching (100) Put.
Stator punching the most according to claim 2, it is characterised in that the outer peripheral face of described root portion (132) and described arc Arc transition between shape surface (1321).
11. stator punchings according to claim 10, it is characterised in that the radius of described circular arc is 0.05mm~0.5mm.
12. 1 kinds of stator cores, it is characterised in that by multiple stator punchings (100) as described in any one of claim 1 to 10 Stacking lamination forms.
13. 1 kinds of motors, it is characterised in that include rotor and the stator core as described in any one of claim 12;Described turn Son is installed in described stator core.
CN201610579612.XA 2016-07-21 2016-07-21 Motor, stator core and its stator punching Active CN106130204B (en)

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Application Number Priority Date Filing Date Title
CN201610579612.XA CN106130204B (en) 2016-07-21 2016-07-21 Motor, stator core and its stator punching

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Application Number Priority Date Filing Date Title
CN201610579612.XA CN106130204B (en) 2016-07-21 2016-07-21 Motor, stator core and its stator punching

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CN106130204A true CN106130204A (en) 2016-11-16
CN106130204B CN106130204B (en) 2019-09-03

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH099532A (en) * 1995-06-16 1997-01-10 Hitachi Ltd Motor
JP2000253603A (en) * 1999-03-04 2000-09-14 Matsushita Seiko Co Ltd Stator core for induction motor
CN101326697A (en) * 2005-12-09 2008-12-17 丰田自动车株式会社 Rotating electrical machines
JP2013027240A (en) * 2011-07-25 2013-02-04 Daikin Ind Ltd Rotary electric machine
CN105262246A (en) * 2015-10-10 2016-01-20 常州大学怀德学院 Long strip-shaped silicon steel punching sheet of brushless DC motor and stator comprising same
CN205945259U (en) * 2016-07-21 2017-02-08 珠海凌达压缩机有限公司 Motor, stator core and stator is towards piece thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH099532A (en) * 1995-06-16 1997-01-10 Hitachi Ltd Motor
JP2000253603A (en) * 1999-03-04 2000-09-14 Matsushita Seiko Co Ltd Stator core for induction motor
CN101326697A (en) * 2005-12-09 2008-12-17 丰田自动车株式会社 Rotating electrical machines
JP2013027240A (en) * 2011-07-25 2013-02-04 Daikin Ind Ltd Rotary electric machine
CN105262246A (en) * 2015-10-10 2016-01-20 常州大学怀德学院 Long strip-shaped silicon steel punching sheet of brushless DC motor and stator comprising same
CN205945259U (en) * 2016-07-21 2017-02-08 珠海凌达压缩机有限公司 Motor, stator core and stator is towards piece thereof

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Address after: 519000 Guangdong city of Zhuhai Province Qianshan

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