CN104143864A - Stator punched piece and stator - Google Patents
Stator punched piece and stator Download PDFInfo
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- CN104143864A CN104143864A CN201310419230.7A CN201310419230A CN104143864A CN 104143864 A CN104143864 A CN 104143864A CN 201310419230 A CN201310419230 A CN 201310419230A CN 104143864 A CN104143864 A CN 104143864A
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- tooth
- stator
- skeleton
- punching
- facewidth
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Abstract
The invention relates to the technical field of brushless direct current motors, in particular to a stator punched piece. The stator punched piece comprises a yoke part in the shape of a circle, the yoke part extends inwards in the radial direction of the circle to be provided with punched piece teeth which are evenly arranged in the circumferential direction of the circle at intervals, punched piece grooves are formed between adjacent two punched piece teeth, and the tooth widths of any two adjacent punched piece teeth are different. The invention further relates to a stator formed by stator punched pieces. The stator comprises a stator iron core, a framework and coils, the stator iron core is formed by the stator punched pieces in a stacking mode, the framework is arranged outside the stator iron core, the coils are wound on the teeth of the stator iron core, and the lengths of varnished wires on the coils on all the teeth are equal. The stator iron core formed by the stator punched pieces in the stacking mode is made to be no longer arranged in a symmetrical mode by changing the tooth widths of the punched piece teeth, and a starting torque dead point is eliminated. Meanwhile, certain tooth groove torque can be reduced, and noise can be lowered.
Description
Technical field
The present invention relates to brshless DC motor technical field, particularly a kind of stator punching and stator.
Background technology
Brshless DC motor with speed-regulating range width, strong, the middle low speed torque excellent performance of overload capacity, efficiency is high, the life-span is long etc., and advantage has started to be widely used on various household electrical appliance, high technology equipment.The brshless DC motor of at present idle call is modal is all three-phase six states, and stator core is 12 grooves or 18 grooves, and rotor is that injecting ferrite or ferrite magnetic shoe are made, and Fig. 1 is the stator laminating structure schematic diagram that forms stator core, and stator punching tooth is wide.This motor exists following not enough:
1, noise is large.Because rotor is that permanent magnet forms, under the cold state of motor, permanent magnet produces cogging torque with the stator core interaction that has groove and makes rotor have a kind of trend of aliging with stator along a certain specific direction, when rotor structure size, one timing of stator core teeth groove physical dimension, the size of cogging torque just changes along with the difference of rotor position in stator core.Like this, in the time that motor is normally worked, it is no longer a definite value that the instantaneous output torque of motor is subject to the impact of cogging torque, but fluctuates round some values, i.e. torque ripple.Be exactly the direct result motor that torque ripple brings produces vibration and noise, when particularly this motor configures three vane axial-flow loads, can give prominence to and produce 45*n(n=2,3,4,5,6,7,8) noise of Hz, total its peak value even reaches the decibel of complete machine.
2, there is detent torque dead point.Taking brshless DC motor of the prior art as example, in the time that electrical power starts, two-phase in its three-phase coil adds voltage simultaneously, rotor is just in time in both sides electromagnetic torque and equates (to be in fact impossible definitely relatively, just difference is too small, to such an extent as to be not enough to drive rotor to rotate) position time, just cannot start.In the time controlling motor with little current work, because power is poor less, so detent torque dead point is wider.And electromagnetic torque difference too small be exactly mainly the structure of therefore stator punching be symmetrical, its facewidth all equates.
Summary of the invention
Primary and foremost purpose of the present invention is to provide a kind of stator punching, and the permanent-magnet brushless DC electric machine noise that is made up of it is little, torque pulsation is little, reliable operation.
For realizing above object, the technical solution used in the present invention is: a kind of stator punching, comprise circular yoke portion, described yoke portion extends inwardly punching tooth is set along annulus radial direction, punching tooth is arranged along the circumferentially even interval of annulus, between two adjacent punching teeth, form punching groove, the facewidth of described any two adjacent punching teeth is different.
Compared with prior art, there is following technique effect in the present invention: by changing the facewidth of punching tooth, the stator core that stator punching is overrided to form is no longer arranged symmetrically with, has eliminated detent torque dead point, also can reduce certain cogging torque simultaneously, reduce noise.
Another object of the present invention is to provide a kind of stator, and noise is little, reliable operation.
For realizing above object, the technical solution used in the present invention is: a kind of stator that adopts described stator punching to make, comprise stator core, skeleton and coil, described stator core is overrided to form by stator punching, stator core is outside equipped with skeleton, and the enamelled wire that is wound with coil on coil and each tooth on the tooth of stator core is equal in length.
Compared with prior art, there is following technique effect in the present invention: by changing the facewidth, the stator core that stator punching is overrided to form is no longer arranged symmetrically with, has eliminated detent torque dead point, reduce certain cogging torque, reduce noise; Meanwhile, on each tooth, the equal guarantee of winding length motor is normally worked.
Brief description of the drawings
Fig. 1 is the stator laminating structure schematic diagram of prior art;
Fig. 2 is stator laminating structure schematic diagram of the present invention, and for ease of observing, in figure, the size of large, medium and small tooth differs larger;
Fig. 3 is the present invention and the contrast of the prior art facewidth, and dotted portion is the facewidth of the prior art, and solid line is the facewidth of the present invention;
Fig. 4 is the three-dimensional structure diagram of upper skeleton of the present invention;
Fig. 5 is the three-dimensional structure diagram of lower skeleton of the present invention;
Fig. 6 is another visual angle three-dimensional structure diagram of Fig. 4;
Fig. 7 is the motor noise spectrum measurement figure that the stator of prior art is made;
Fig. 8 is the motor noise spectrum measurement figure that stator of the present invention is made.
Embodiment
Below in conjunction with Fig. 2 to Fig. 8, the present invention is described in further detail.
Consult Fig. 2, a kind of stator punching, comprise circular yoke portion 11, described yoke portion 11 extends inwardly punching tooth 12 is set along annulus radial direction, punching tooth 12 is arranged along the circumferentially even interval of annulus, between two adjacent punching teeth 12, form punching groove 13, the facewidth of described any two adjacent punching teeth 12 is different.Here, the facewidth of two adjacent punching teeth 12 is arbitrarily arranged to unequal, exactly in order to break original symmetric design, is changed motor cogging torque, it should be noted that the size of the facewidth of each punching tooth 12 is different here, just less difference.
As preferred version of the present invention, select the facewidth of large, medium and small three kinds of sizes here.The multiple that the number of described punching groove 13 is three, is convenient to arrange large, medium and small tooth, and as its punching groove 13 of a little bit smaller motor has 12 or 18, its punching groove 13 of larger motor has 36 or more.The large, medium and small tooth of convenient layout, equates the sum of large, medium and small tooth.Described punching tooth 12 comprises canine tooth 121, middle tooth 122 and little tooth 123, and large, medium and small tooth 121,122,123 circumferentially repeats to arrange along annulus successively, presses clockwise or counter clockwise direction, large-in-little-large-in-the little layout that repeats like this.
Consult Fig. 3, the facewidth D2 of described middle tooth 122 equals the half of canine tooth 121 facewidth D1 and little tooth 123 facewidth D3 sums, and the facewidth of large, medium and small tooth 121,122,123 is arithmetic progression layout, and mathematic(al) representation is D2=(D1+D3)/2.Be unlikely to landing from the tooth of stator core for the ease of coiling and coil, the end that suspends of large, medium and small tooth 121,122,123 is T-shaped, here it should be noted that, the facewidth of large, medium and small tooth 121,122,123 is different, only refer to tooth body part, its profile that suspends end matches.For ease of understanding, putting together with stator punching of the present invention prior art in Fig. 3, for comparing, in figure, middle tooth 122 facewidth of the present invention are the facewidth of the prior art, large and small tooth 121,123 facewidth are greater than respectively, are less than the facewidth of the prior art, from figure, also can find out, only facewidth part is changed, and the end that suspends of each tooth is still symmetrical arranged.The periphery of described yoke portion 11 is provided with a locating notch 14, when being convenient to stator punching 10 and laminating into stator core and when stator winding, locates.
A kind of stator that adopts said stator punching to make, comprise stator core, skeleton 20 and coil, described stator core is overrided to form by stator punching 10, stator core is outside equipped with skeleton 20, the effect of skeleton 20 is to prevent that enamelled wire from directly contacting with stator core, prevents that the insulating barrier of enamelled wire is impaired.The enamelled wire that is wound with coil on coil and each tooth on the tooth of stator core is equal in length, and guarantee motor is normally worked.
As preferred version of the present invention, here the stator punching that forms described stator core is preferably as follows scheme: the multiple that the number of described punching groove 13 is three, described punching tooth 12 comprises canine tooth 121, middle tooth 122 and little tooth 123, and large, medium and small tooth 121,122,123 circumferentially repeats to arrange along annulus successively.The facewidth D2 of described middle tooth 122 equals the half of canine tooth 121 facewidth D1 and little tooth 123 facewidth D3 sums, and the end profile that suspends of large, medium and small tooth (121,122,123) matches and is T-shaped; The periphery of described yoke portion 11 is provided with a locating notch 14.
Consult Fig. 4 to Fig. 6, for the ease of the equipment of skeleton 20, described skeleton 20 is made up of upper and lower skeleton 20a, 20b, described upper and lower skeleton 20a, 20b include the skeleton body 21 matching with described yoke portion 11, here said matching is that both interior profile is consistent, and the excircle of yoke portion 11 can be more than or equal to the excircle of skeleton body 21.Skeleton body 21 extends inwardly multiple skeleton teeth 22 is set along itself radial direction, and skeleton tooth 22 matches with quantity, the position of described punching tooth 12, and the facewidth of described skeleton tooth 22 all matches with described canine tooth 121 width; 22, adjacent skeleton tooth forms skeleton grooves 23.Here dexterously the facewidth of skeleton tooth 22 is arranged to widely, is played the effect of parcel stator core protective paint envelope curve, can make to be again wound on enamelled wire length on each skeleton tooth 22 consistent.
Upper and lower skeleton 20a, 20b form by following scheme arrangement the parcel of stator core: postpone the parcel forming stator iron core tooth is set to lower skeleton 20b mono-side in the edge of the skeleton grooves of described upper skeleton 20a, and its distance that postpones matches with the thickness of stator core; Postpone the parcel forming upper skeleton 20a extension be set to upper skeleton 20a mono-side in the edge of the skeleton grooves of described lower skeleton 20b.
In addition, described upper and lower skeleton 20a, a 20b side are away from each other provided with projection, described projection comprise be arranged on skeleton tooth 22 suspend end the first projection 24 and be arranged on the second projection 25 on skeleton body 21.The arrangement convenience coiling of first and second projection 24,25, cabling, concrete shape and the position of first and second projection 24,25 are determined according to the technique of stator, repeat no more here.
Consult Fig. 7, Fig. 8, in order to embody beneficial effect of the present invention, the motor of here facewidth stator such as existing and the facewidth stator such as not of the present invention being made has carried out noise spectrum test.Wherein Fig. 7 is the motor that adopts the facewidth stator punching such as common to make, motor packs into after air-conditioning load, with the load noise of spectrum measurement instrument test complete machine, we from test result figure can clearly find out, in the time of 360Hz, there is noise peak, complete machine can be obviously recognized at scene different sound, people's ear feels under the weather, certainly, when not every motor is tested, be all that peak value appears in 360Hz, as described in background technology part, the general easy frequency that occurs peak value is 45*n(n=2,3,4,5,6,7,8) Hz.Fig. 8 is the motor that the facewidth stator punching such as adopts not to make, and is with a load with the former, and only the facewidth changes, with the load noise of spectrum measurement instrument test complete machine, from test result, we can clearly find out, no longer include peak value and occur, the total decibel value decline of complete machine noise 5.67dB in addition.Can learn by testing us, by the facewidth such as is not set, not only eliminate peak noise, also make total decibel value decline, effectively improve noise.
Claims (9)
1. a stator punching, comprise circular yoke portion (11), described yoke portion (11) extends inwardly punching tooth (12) is set along annulus radial direction, punching tooth (12) is arranged along the circumferentially even interval of annulus, between adjacent two punching teeth (12), form punching groove (13), it is characterized in that: the facewidth of described any two adjacent punching teeth (12) is different.
2. stator punching as claimed in claim 1, is characterized in that: described punching tooth (12) comprises canine tooth (121), middle tooth (122) and little tooth (123), and large, medium and small tooth (121,122,123) circumferentially repeats to arrange along annulus successively.
3. stator punching as claimed in claim 2, it is characterized in that: the facewidth D2 of described middle tooth (122) equals the half of canine tooth (121) facewidth D1 and little tooth (123) facewidth D3 sum, the end profile that suspends of large, medium and small tooth (121,122,123) matches and is T-shaped; The periphery of described yoke portion (11) is provided with a locating notch (14).
4. a stator that adopts stator punching claimed in claim 1 to make, it is characterized in that: comprise stator core, skeleton (20) and coil, described stator core is overrided to form by stator punching (10), stator core is outside equipped with skeleton (20), and the enamelled wire that is wound with coil on coil and each tooth on the tooth of stator core is equal in length.
5. stator as claimed in claim 4, is characterized in that: described punching tooth (12) comprises canine tooth (121), middle tooth (122) and little tooth (123), and large, medium and small tooth (121,122,123) circumferentially repeats to arrange along annulus successively.
6. stator as claimed in claim 5, it is characterized in that: the facewidth D2 of described middle tooth (122) equals the half of canine tooth (121) facewidth D1 and little tooth (123) facewidth D3 sum, the end profile that suspends of large, medium and small tooth (121,122,123) matches and is T-shaped; The periphery of described yoke portion (11) is provided with a locating notch (14).
7. the stator as described in claim 5 or 6, it is characterized in that: described skeleton (20) is made up of upper and lower skeleton (20a, 20b), described upper and lower skeleton (20a, 20b) includes the skeleton body (21) matching with described yoke portion (11), skeleton body (21) extends inwardly multiple skeleton teeth (22) is set along itself radial direction, skeleton tooth (22) matches with quantity, the position of described punching tooth (12), and the facewidth of described skeleton tooth (22) all matches with described canine tooth (121) width; Between adjacent skeleton tooth (22), form skeleton grooves (23).
8. stator as claimed in claim 7, is characterized in that: postpone the parcel forming stator iron core tooth is set to lower skeleton (20b) side in the edge of the skeleton grooves of described upper skeleton (20a), and its distance that postpones matches with the thickness of stator core; Postpone the parcel forming upper skeleton (20a) extension be set to upper skeleton (20a) side in the edge of the skeleton grooves of described lower skeleton (20b).
9. stator as claimed in claim 8, it is characterized in that: described upper and lower skeleton (20a, a 20b) side is away from each other provided with projection, described projection comprise be arranged on skeleton tooth (22) suspend end the first projection (24) and be arranged on the second projection (25) on skeleton body (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310419230.7A CN104143864A (en) | 2013-09-13 | 2013-09-13 | Stator punched piece and stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310419230.7A CN104143864A (en) | 2013-09-13 | 2013-09-13 | Stator punched piece and stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104143864A true CN104143864A (en) | 2014-11-12 |
Family
ID=51852970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310419230.7A Pending CN104143864A (en) | 2013-09-13 | 2013-09-13 | Stator punched piece and stator |
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| Country | Link |
|---|---|
| CN (1) | CN104143864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107302271A (en) * | 2017-08-30 | 2017-10-27 | 广东威灵电机制造有限公司 | Stator, electric machine assembly and compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118414Y (en) * | 2007-10-29 | 2008-09-17 | 深圳航天科技创新研究院 | Square wave three-phase brushless permanent magnetic DC electromotor |
| CN201450371U (en) * | 2009-04-29 | 2010-05-05 | 中山大洋电机股份有限公司 | Stator structure of three-phase motor |
| CN102035272A (en) * | 2009-09-25 | 2011-04-27 | 福特全球技术公司 | Electric machine with multiple phases |
| CN203504313U (en) * | 2013-09-13 | 2014-03-26 | 合肥凯邦电机有限公司 | Stator punching sheet and stator |
-
2013
- 2013-09-13 CN CN201310419230.7A patent/CN104143864A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118414Y (en) * | 2007-10-29 | 2008-09-17 | 深圳航天科技创新研究院 | Square wave three-phase brushless permanent magnetic DC electromotor |
| CN201450371U (en) * | 2009-04-29 | 2010-05-05 | 中山大洋电机股份有限公司 | Stator structure of three-phase motor |
| CN102035272A (en) * | 2009-09-25 | 2011-04-27 | 福特全球技术公司 | Electric machine with multiple phases |
| CN203504313U (en) * | 2013-09-13 | 2014-03-26 | 合肥凯邦电机有限公司 | Stator punching sheet and stator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107302271A (en) * | 2017-08-30 | 2017-10-27 | 广东威灵电机制造有限公司 | Stator, electric machine assembly and compressor |
| CN107302271B (en) * | 2017-08-30 | 2019-12-17 | 广东威灵电机制造有限公司 | Stator, motor element and compressor |
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Application publication date: 20141112 |
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| RJ01 | Rejection of invention patent application after publication |