CN102780374B - Stator punched plate of single-phase direct current brushless motor - Google Patents
Stator punched plate of single-phase direct current brushless motor Download PDFInfo
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- CN102780374B CN102780374B CN201210228173.XA CN201210228173A CN102780374B CN 102780374 B CN102780374 B CN 102780374B CN 201210228173 A CN201210228173 A CN 201210228173A CN 102780374 B CN102780374 B CN 102780374B
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Abstract
A stator punched plate of a single-phase direct current brushless motor comprises a stator punched plate body and is characterized in that the inner arc of the stator punched plate body is in a step tooth shape, an asymmetrical continuous arc shape or an eccentric circular arc shape, the circular arc of the inner arc is transited by an offset circular arc, the offset direction is directed to a corresponding stator tooth portion, the radius of the offset circular arc is R, the radius of the stator inner arc before offset is R0, the center of a circle offset circle radius of the offset circular arc is r, the circle center offset angle of the offset circular arc with a central axis serving as a basic reference is alpha, the offset distance of the intersection point between the offset circular arc and the stator tooth central axis of the stator punched plate is e, the relations among the R, the R0, the r, the alpha and the e conform to a cosine law, and the radius of the offset circular arc can be determined through R=sqrt((R0+e)2+r2-2r(R0+e)*cos(alpha). According to the stator punched plate of the single-phase direct current brushless motor, an optimized stator punching inner arc structure is utilized, the flux density distribution in air gaps of the punching structure which is a step tooth shape and a continuous arc shape tooth is rearranged, the flux density transition tends to be even, the starting torque is improved by about 14.48%, the average output torque is improved by 0.6%, the torque pulsation is decreased by 2.1%, the electromagnetic noise and vibration of a motor are improved, and the efficiency of the motor is increased.
Description
Technical field
The present invention relates to a kind of stator punching of single-phase DC brushless motor, be mainly applicable to fan of refrigerator single-phase DC brushless motor, belong to the optimisation technique of single-phase DC brushless motor stator punching profile of tooth used.
Background technology
Traditional stator punching for single-phase DC brushless motor, the tooth portion of stator punching adopts dissymmetrical structure (ladder profile of tooth or continuously arcuation profile of tooth), and motor starting torque is provided, and makes motor operation.In the time that stator punching adopts asymmetric ladder tooth-shape structure, when arc section is transitioned into ladder section, in air gap, magnetic energy distributes and undergos mutation, and motor-output produces larger fluctuation, and torque pulsation is up to approximately ± 115.42%; And in the time that stator punching adopts continuous arcuation tooth-shape structure directly to replace ladder profile of tooth, the maximum starting torque of motor (minimal air gap and maximum air gap are poor) is difficult to balance with average output (average size of gaps).Because, quite high for manufacture method and the requirement of stator punching.Person skilled has also been made a series of improvement, if Chinese patent literature number is that CN202206207U discloses a kind of Assembled eccentric stator punching sheet for permanent magnet servo motor on April 25th, 2012, it comprises punching body, it is characterized in that described punching body is assemblied to form by more than two sector element stator punching, sector element stator punching is provided with punching groove, the notch of punching groove is formed enclosed construction by the punching body of the assembled rear composition of sector element stator punching, punching body inner circle is provided with the eccentric arc that quantity is identical with rotor number of poles, the sector element stator punching bottom of this structure adopts eccentric arc structure.It is said, can make permanent-magnet servo motor air gap flux density waveform sineization, reduce ripple torque, and adopt the punching groove notch of enclosed construction, can reduce motor cogging torque, thereby reduce the pulsating torque of motor, improve motor performance.But, its complex structure, manufacturing cost is high, and in practice, fails to produce a desired effect.Therefore, be necessary further improvement.
Summary of the invention
Object of the present invention aims to provide one can improve air gap flux density distribution situation in motor, reduce motor torque pulsation, improve motor starting torque, and have simple and reasonable, design ingenious, function admirable, the stator punching of convenient and practical single-phase DC brushless motor, to overcome weak point of the prior art.
By the stator punching of a kind of single-phase DC brushless motor of this object design, comprise stator punching, the inner arc that it is characterized in that stator punching is ladder profile of tooth, asymmetric continuous arcuation or off-centre operation arcuation, and its circular arc adopts biasing arc transition, and biased direction is pointed to corresponding stator teeth; Wherein the setover radius R and biasing front stator inner arc radius R of circular arc
0, the center of circle biasing radius of circle r of biasing circular arc, the angle [alpha] of the center of circle biasing of biasing circular arc taking stator punching axis as benchmark, and relation between biasing circular arc and the stator tooth axis intersection point offset distance e of stator punching meets the cosine law, and can pass through
Determine the radius of biasing circular arc.
The stator teeth of described stator punching is dissymmetrical structure, and adopts biasing arc transition.
The center of circle biasing radius of a circle of described biasing circular arc is r, and the scope of its r is 0.25mm～1.5mm.
The angle of the center of circle biasing of described biasing circular arc taking stator punching axis as benchmark is α, and the scope of its α is-7.5 °～7.5 °.
The stator tooth axis intersection point offset distance of described biasing circular arc and stator punching is e, and the scope of its e is 0～0.1mm.
Described stator punching is formed in one, and be provided with six above punching grooves, adjacent punching groove inner port separates shape for not joining, the inner arc of described stator punching is ladder profile of tooth, asymmetric continuous arcuation or off-centre operation arcuation, and its inner arc quantity is identical with the quantity of rotor number of poles and punching groove.
The present invention adopts and optimizes stator punching inner arc structure, the close distribution of magnetic in rerouting ladder profile of tooth and continuously arcuation profile of tooth lamination structure air gap, make the close transition of magnetic be tending towards even, starting torque improves approximately 14.48%, average output torque improves 0.6%, torque pulsation declines 2.1%, has improved electromagnetic noise and the vibration of motor, has improved the efficiency of motor.Under identical cost, the electric performance of motor is improved, and it has simple and reasonable, design ingenious, function admirable, the feature such as convenient and practical.
Brief description of the drawings
Fig. 1 is one embodiment of the invention structural representation.
Fig. 2 is tooth portion structure for amplifying schematic diagram of an embodiment.
Fig. 3 is A place structure for amplifying schematic diagram in Fig. 2.
Fig. 4 is an embodiment stator pole shoes structure for amplifying schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Referring to Fig. 1-Fig. 4, a kind of stator punching of single-phase DC brushless motor, comprise stator punching 1, stator punching 1 is formed in one, and be provided with six punching grooves 5, and adjacent punching groove 5 inner port separate shape for not joining, and the inner arc of stator punching 1 uses 2 transition of biasing circular arc, its quantity is identical with the quantity of rotor number of poles and punching groove 5, and the biased direction 4 of biasing circular arc 2 is pointed to corresponding stator teeth.
Wherein the setover radius R and biasing front stator inner arc radius R of circular arc 2
0the radius r of the center of circle biasing circle 3 of biasing circular arc 2, the angle [alpha] of the center of circle biasing of biasing circular arc 2 taking stator punching 1 axis as benchmark, the relation between biasing circular arc 2 and the stator tooth axis intersection point offset distance e of stator punching 1 meets the cosine law, and can pass through
Determine the radius of biasing circular arc 2; And center of circle biasing radius r is 0.25mm～1.5mm, and angle of eccentricity α is-7.5 °～7.5 °, and biasing circular arc 2 is 0～0.1mm with the stator tooth axis intersection point offset distance e of stator punching (1).
In the time that stator punching 1 adopts ladder tooth-shape structure, described biasing circular arc 2 is taking center of circle biasing circle 3 radiuses and the definite point of angle of eccentricity α as the center of circle, and biasing circular arc 2 radius Rs can pass through
Calculate.
In the time that stator punching 1 adopts continuous arcuation tooth-shape structure, transition arc and stator tooth axis intersection point are fixed point, by the transition arc of technique scheme biasing ladder tooth-shape structure, connecting stator pole shoe starting point, with axis intersection point, stator pole shoes terminal, form the continuous arcuation toothing of biasing circular arc 2.
Above-mentioned is preferred version of the present invention, and those of ordinary skill in the art are to its simple modification or transformation, within all dropping on protection scope of the present invention.
Claims (5)
1. the stator punching of a single-phase DC brushless motor, comprise stator punching (1), the inner arc that it is characterized in that stator punching (1) is ladder profile of tooth, asymmetric continuous arcuation or off-centre operation arcuation, its circular arc adopts the transition of biasing circular arc (2), and biased direction (4) is pointed to corresponding stator teeth; Wherein the setover radius R and biasing front stator inner arc radius R of circular arc (2)
0center of circle biasing circle (3) radius r of biasing circular arc (2), the angle [alpha] of the center of circle biasing of biasing circular arc (2) taking stator punching (1) axis as benchmark, and relation between biasing circular arc (2) and the stator tooth axis intersection point offset distance e of stator punching (1) meets the cosine law, and can pass through
Determine the radius of biasing circular arc (2);
The stator teeth of described stator punching (1) is dissymmetrical structure, and adopts the transition of biasing circular arc (2).
2. the stator punching of single-phase DC brushless motor according to claim 1, is characterized in that the radius of the center of circle biasing circle (3) of described biasing circular arc (2) is r, and the scope of its r is 0.25mm～1.5mm.
3. the stator punching of single-phase DC brushless motor according to claim 2, is characterized in that the angle of the center of circle biasing of described biasing circular arc (2) taking stator punching (1) axis as benchmark is as α, and the scope of its α is-7.5 °～7.5 °.
4. the stator punching of single-phase DC brushless motor according to claim 3, is characterized in that described biasing circular arc (2) and the stator tooth axis intersection point offset distance of stator punching (1) are e, and the scope of its e is 0～0.1mm.
5. according to the stator punching of single-phase DC brushless motor described in claim 1-4 any one, it is characterized in that described stator punching (1) is formed in one, and be provided with six above punching grooves (5), adjacent punching groove (5) inner port separates shape for not joining, the inner arc of described stator punching (1) is ladder profile of tooth, asymmetric continuous arcuation or off-centre operation arcuation, and its inner arc quantity is identical with the quantity of rotor number of poles and punching groove (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210228173.XA CN102780374B (en) | 2012-07-02 | 2012-07-02 | Stator punched plate of single-phase direct current brushless motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210228173.XA CN102780374B (en) | 2012-07-02 | 2012-07-02 | Stator punched plate of single-phase direct current brushless motor |
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| Publication Number | Publication Date |
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| CN102780374A CN102780374A (en) | 2012-11-14 |
| CN102780374B true CN102780374B (en) | 2014-09-10 |
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| CN201210228173.XA Active CN102780374B (en) | 2012-07-02 | 2012-07-02 | Stator punched plate of single-phase direct current brushless motor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107872105A (en) * | 2016-09-26 | 2018-04-03 | 珠海凌达压缩机有限公司 | Motor stator punching, motor stator structure and motor |
| CN108832737B (en) * | 2018-07-16 | 2024-04-19 | 珠海格力电器股份有限公司 | Motor stator punching sheet, motor stator and motor |
| CN109713814B (en) * | 2019-02-19 | 2020-05-19 | 珠海格力电器股份有限公司 | Motor structure and motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881746A (en) * | 2005-05-24 | 2006-12-20 | 三美电机株式会社 | Single-phase blushless motor |
| CN201994734U (en) * | 2011-01-26 | 2011-09-28 | 黄伟健 | Stator for brushless motors |
| CN202059305U (en) * | 2011-05-25 | 2011-11-30 | 上海众联能创新能源科技有限公司 | A position sensorless motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8058765B2 (en) * | 2009-06-19 | 2011-11-15 | GM Global Technology Operations LLC | Methods and apparatus for a bar-wound stator with rotated conductors |
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2012
- 2012-07-02 CN CN201210228173.XA patent/CN102780374B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881746A (en) * | 2005-05-24 | 2006-12-20 | 三美电机株式会社 | Single-phase blushless motor |
| CN201994734U (en) * | 2011-01-26 | 2011-09-28 | 黄伟健 | Stator for brushless motors |
| CN202059305U (en) * | 2011-05-25 | 2011-11-30 | 上海众联能创新能源科技有限公司 | A position sensorless motor |
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| CN102780374A (en) | 2012-11-14 |
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Owner name: WELLING (WUHU) MOTOR MANUFACTURING CO., LTD. Free format text: FORMER OWNER: FOSHAN WELLING ELECTRONIC APPLIANCE CO., LTD. Effective date: 20150615 |
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Effective date of registration: 20150615 Address after: 241009 Wuhu economic and Technological Development Zone, Anhui, Wuhu Patentee after: Welling (Wuhu) Motor Manufacturing Co., Ltd. Address before: Two, 528311 Industrial Zone, Beijiao Town, Shunde District, Guangdong, Foshan Patentee before: Foshan Welling Electronic Appliance Co., Ltd. |