CN101728879B - Motor - Google Patents
Motor Download PDFInfo
- Publication number
- CN101728879B CN101728879B CN200810217074.5A CN200810217074A CN101728879B CN 101728879 B CN101728879 B CN 101728879B CN 200810217074 A CN200810217074 A CN 200810217074A CN 101728879 B CN101728879 B CN 101728879B
- Authority
- CN
- China
- Prior art keywords
- arc
- connecting portion
- ring magnet
- shaped connecting
- air gap
- 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.)
- Expired - Fee Related
Links
- 238000009434 installation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
- H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
一种电机，包括定子及转子(20)，定子包括外壳(10)和贴靠在外壳内侧的环形磁铁(12)。外壳(10)的径向横截面为圆角多边形，包括若干侧壁(10a～10d)及连接相邻两个侧壁的弧形连接部(11a～11d)。环形磁铁对应于弧形连接部(11a～11d)的部分的厚度大于贴靠侧壁(10a～10d)的部分的厚度，环形磁铁的内侧表面与转子(20)的外侧表面之间存在气隙(123)，环形磁铁的内侧表面为弧面，该弧面中，对应于弧形连接部(11a～11d)的部分比对应于侧壁(10a～10d)的部分径向凸出，使得与弧形连接部(11a～11d)对应的气隙宽度小于与侧壁(10a～10d)对应的气隙宽度。本发明的电机外壳为多边形，方便运输和安装，外壳内的空间利用率高。
A motor, comprising a stator and a rotor (20), the stator comprising a shell (10) and a ring magnet (12) abutting against the inner side of the shell. The radial cross section of the casing (10) is a polygon with rounded corners, including several side walls (10a-10d) and arc-shaped connecting parts (11a-11d) connecting two adjacent side walls. The thickness of the portion of the ring magnet corresponding to the arc-shaped connecting portion (11a-11d) is greater than the thickness of the portion abutting against the side wall (10a-10d), and there is an air gap between the inner surface of the ring magnet and the outer surface of the rotor (20) (123), the inner surface of the ring magnet is an arc surface, and in the arc surface, the part corresponding to the arc-shaped connecting part (11a-11d) is radially protruding than the part corresponding to the side wall (10a-10d), so that it is consistent with The width of the air gap corresponding to the arc-shaped connecting portion (11a-11d) is smaller than the width of the air gap corresponding to the side wall (10a-10d). The motor casing of the invention is polygonal, which is convenient for transportation and installation, and the space utilization rate in the casing is high.
Description
Technical field
The present invention relates to machine field, relate in particular to a kind of stator structure of motor.
Background technology
Figure 1 shows that a kind of sectional view of traditional permanent magnet DC motor, this kind motor adopts columniform shell 1, and rotor 3 is installed in the cylinder blanket 1, permanent magnet 2 be fixed to cylinder blanket 1 inboard and be distributed in rotor 3 around.Yet there is following problem in the motor with this kind contour structures: 1) roll easily in the transportation; 2) inconvenience is installed, needs extra positioner.
Figure 2 shows that a kind of square motor of in recent years industry exploitation, this kind motor adopts square shell 1 ', and permanent magnet 2 ' is installed on four sidewalls of shell 1 ' inner surface, and rotor 3 ' is installed in the shell 1 ', and permanent magnet 2 ' is distributed in rotor 3 ' on every side.Although the motor of this kind tool square shell has solved the deficiency of above-mentioned traditional cylindrical motor, yet there is following problem in it: 1) the outer casing space utilance is low, the space at place, four angles does not obtain utilizing; 2) rotor diameter equals shell sizes and deducts the thickness of shell and the thickness of permanent magnet, is requiring in the less situation of motor housing size, and the external diameter of rotor can be subjected to the restriction of shell and magnet thickness.In addition, magnet and the air gap between the rotor of existing this square motor are uniform thickness, and reluctance torque (magnetic detent torque) is large and to have demagnetization (demagnetisation) risk higher.
Therefore, be necessary to develop a kind of novel high square motor of space availability ratio.
Summary of the invention
For the low defective of above-mentioned existing square motor outer casing space utilance, the invention provides the high motor of a kind of space availability ratio.
For realizing the object of the invention, the invention provides a kind of motor, comprise stator and be positioned at the rotor of described stator, described stator comprises a shell, described shell comprises some sidewalls and connects the arc connecting portion of two adjacent sidewalls that the radial cross-section of described shell is the fillet polygon; Described stator also comprises the annular magnet that abuts in described shell inboard, described annular magnet corresponding to the thickness of the part of the described arc connecting portion thickness greater than the part of the described sidewall that reclines, there is air gap between the inner surface of described annular magnet and the outer surface of described rotor, the inner surface of described annular magnet is cambered surface, in the described cambered surface, the part corresponding with described arc connecting portion is than radially protruding with part corresponding to described sidewall, so that the width of air gap corresponding with described arc connecting portion is less than the width of air gap corresponding with described sidewall.
Preferably, the air gap corresponding with described annular magnet thickness is the narrowest, and the air gap corresponding with described annular magnet thinnest part is the widest.
Preferably, there is the space between the inner surface of the part outer surface of described annular magnet and described arc connecting portion or sidewall of living in.
The beneficial effect that illustrated embodiment of the present invention has: the shell of motor is polygon, convenient transportation and installation; Adopted annular magnet, ease of assembly; In this annular magnet, the thickness of the part corresponding with the arc connecting portion has effectively utilized the space in the shell greater than the thickness of the part of the sidewall that reclines, and has improved the utilance of outer casing space.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet appended graphic only provide with reference to and the explanation usefulness, the present invention is limited.
Description of drawings
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention is described in detail, will make technical scheme of the present invention and other beneficial effects apparent.In the accompanying drawing:
Fig. 1 is a kind of sectional view of traditional direct current machine;
Fig. 2 is the sectional view of the traditional direct current machine of another kind;
Fig. 3 is the schematic cross-section of the motor of one embodiment of the invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
Fig. 3 is the schematic diagram of radial cross-section of the motor of one embodiment of the invention.As shown in Figure 3, this motor comprises stator and rotor 20, and stator comprises shell 10 and installation annular magnet 12 in the enclosure, and rotor 20 is installed in the annular magnet 12, can rotate in stator, and the circle that is illustrated by the broken lines among the figure is the outer contour of rotor 20.The radial cross-section of shell 10 be one with the quadrangle of fillet, it comprises four sidewall 10a～10d and four arc connecting portion 11a～11d, particularly, arc connecting portion 11a connects adjacent two sidewall 10a and 10b, arc connecting portion 11b connects adjacent two sidewall 10b and 10c, and the rest may be inferred for other.
As shown in Figure 3, annular magnet 12 is installed in the inboard of shell 10, and the thickness of the part that annular magnet 12 is corresponding with arc connecting portion 11a～11d is greater than the thickness of the part that clings to sidewall 10a～10d.Annular magnet 12 be looped around rotor 20 around.Exist air gap 123 to allow that rotor 20 is with respect to stator rotation between the inner surface of the outer surface of rotor 20 and annular magnet 12.The inner surface of annular magnet 12 is cambered surface, but the width of air gap of the outer surface of this cambered surface and rotor 20 is inconsistent, particularly, in this cambered surface, compare corresponding to radially protruding the position of sidewall 10a～10d, so that the width of air gap corresponding with arc connecting portion 11a～11d is less than the width of air gap corresponding with sidewall 10a～10d position corresponding to arc connecting portion 11a～11d.In a preferred version, the air gap corresponding with the thickness of annular magnet 12 is the narrowest, and the air gap corresponding with annular magnet 12 thinnest parts is the widest.The inconsistent air gap of this width helps to reduce the reluctance torque (magnetic detent torque) of rotor 20, and the risk that reduces demagnetization (demagnetisation).
In addition, exist space 121 between the inner surface of the outer surface of annular magnet 12 and arc connecting portion 11a～11d, similarly, the part outer surface of annular magnet 12 also can and sidewall connecting portion 10a～10d between have the space, this space can be used for accommodating binding agent so that annular magnet 12 is adhered to shell 10 more firmly.On the other hand, there is the space in arc connecting portion place, also is convenient to annular magnet 12 is assembled into the inboard of shell 10.
As a kind of preferred version, arc connecting portion 11a～11d is uniform thickness (for example thickness of 1 millimeter or 0.8 millimeter) so that make, and the center of rotation of rotor 20 is departed from the center of circle of each arc connecting portion.For example, as shown in Figure 3, the center of circle O ' of arc connecting portion 11a departs from the center of rotation O of rotor 20.Under this scheme, the curvature of the outer surface of the ratio of curvature rotor 20 of arc connecting portion 11a～11d is little, seems comparatively level and smooth.
As another kind of improvement project, the radius of curvature of the inner surface of arc connecting portion 11a～11d greater than part corresponding with each arc connecting portion 11a～11d in the annular magnet 12 the outer surface radius of curvature.
As another kind of improvement project, the ratio range of the radius of curvature of the radius of curvature of the inner surface of arc connecting portion 11a～11d and the inner surface of annular magnet 12 is 1.1～1.8.In a preferred version, the ratio with the radius of curvature of the inner surface of part corresponding to sidewall 10a～11d in the radius of curvature of the inner surface of arc connecting portion 11a～11d and the annular magnet 12 is 11.80/6.84, approximates 1.73.As mentioned above, in the inner surface of annular magnet 12, the radius of curvature of the part corresponding with sidewall 10a～11d (being called the first radius) is less than the radius of curvature corresponding with arc connecting portion 11a～11d (being called the second radius), therefore, in this embodiment, the ratio of the radius of curvature of the inner surface of arc connecting portion 11a～11d and above-mentioned the second radius will be less than 1.73.
As another kind of improvement project, annular magnet 12 is symmetrical about the diagonal of shell 10, symmetrical center line is through the center of rotation O of rotor 20, and in the annular magnet 12 radius of curvature of the inner surface of the part corresponding with arc connecting portion 11a～11b greater than the radius of curvature of the outer surface of rotor 20.Under this scheme, the air gap ground width between rotor 20 and the annular magnet 12 is inconsistent, and the width of air gap at this symmetrical center line place is minimum, and the width of air gap of the center of close each sidewall 10a～10d is maximum.This symmetric structure is convenient to make and assembling.
As another preferred version, shell is uniform thickness (for example all being 0.8,0.9 or 1 millimeter thickness), so that processing and manufacturing, to effectively utilize the space in the shell.
As a kind of alternative, the thickness of arc connecting portion 11a～11d is greater than the thickness of sidewall 10a～11d, and for example, the thickness of sidewall 10a～11d is 1 millimeter, and the thickness of arc connecting portion 11a～11d is 1～1.1 millimeter.
Below by reference to the accompanying drawings the present invention is set forth.The radial cross-section that those skilled in the art will realize that the shell of motor of the present invention with the quadrangle of fillet for example is not limited to, and the radial cross-section of the shell of motor of the present invention can be pentagon, hexagon with fillet etc.
The above for the person of ordinary skill of the art, can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of claim of the present invention.
Claims (8)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810217074.5A CN101728879B (en) | 2008-10-24 | 2008-10-24 | Motor |
| US12/565,227 US8063529B2 (en) | 2008-09-23 | 2009-09-23 | Motor |
| DE200910050306 DE102009050306A1 (en) | 2008-10-24 | 2009-10-22 | electric motor |
| US12/604,946 US8049387B2 (en) | 2008-10-24 | 2009-10-23 | Electric motor |
| JP2009261328A JP5650395B2 (en) | 2008-10-24 | 2009-10-26 | Electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810217074.5A CN101728879B (en) | 2008-10-24 | 2008-10-24 | Motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101728879A CN101728879A (en) | 2010-06-09 |
| CN101728879B true CN101728879B (en) | 2013-04-24 |
Family
ID=42145825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810217074.5A Expired - Fee Related CN101728879B (en) | 2008-09-23 | 2008-10-24 | Motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5650395B2 (en) |
| CN (1) | CN101728879B (en) |
| DE (1) | DE102009050306A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728889B (en) * | 2008-10-31 | 2013-04-17 | 德昌电机(深圳)有限公司 | Motor |
| CN204597650U (en) * | 2012-08-23 | 2015-08-26 | 广东肇庆爱龙威机电有限公司 | The multipole permanent magnet DC motor of magnetic pole integration |
| WO2016143098A1 (en) * | 2015-03-11 | 2016-09-15 | 三菱電機株式会社 | Stator unit and rotating electric machine using same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09224337A (en) | 1996-02-15 | 1997-08-26 | Seiko Epson Corp | Permanent magnet for small motors and small motors |
| US6995488B1 (en) * | 1999-08-27 | 2006-02-07 | Matsushita Electric Industrial Co., Ltd. | Permanent magnet field small DC motor |
| CN101051766A (en) * | 2006-02-24 | 2007-10-10 | 马渊马达株式会社 | Small-sized motor having polygonal outer shape |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008043031A (en) * | 2006-08-04 | 2008-02-21 | Mabuchi Motor Co Ltd | Small motor having thin part formed on ring shaped field magnet |
-
2008
- 2008-10-24 CN CN200810217074.5A patent/CN101728879B/en not_active Expired - Fee Related
-
2009
- 2009-10-22 DE DE200910050306 patent/DE102009050306A1/en not_active Ceased
- 2009-10-26 JP JP2009261328A patent/JP5650395B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09224337A (en) | 1996-02-15 | 1997-08-26 | Seiko Epson Corp | Permanent magnet for small motors and small motors |
| US6995488B1 (en) * | 1999-08-27 | 2006-02-07 | Matsushita Electric Industrial Co., Ltd. | Permanent magnet field small DC motor |
| CN101051766A (en) * | 2006-02-24 | 2007-10-10 | 马渊马达株式会社 | Small-sized motor having polygonal outer shape |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009050306A1 (en) | 2010-06-10 |
| CN101728879A (en) | 2010-06-09 |
| JP5650395B2 (en) | 2015-01-07 |
| JP2010104229A (en) | 2010-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191008 Address after: 529000 Donghai Road 888, Jianghai District, Jiangmen City, Guangdong Province Patentee after: Dechang Electric Machinery (Jiangmen) Co.,Ltd. Address before: Two new industrial village in Baoan District Shenzhen City manhole town of Guangdong Province in 518125 Patentee before: JOHNSON ELECTRIC (SHENZHEN) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20211024 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |