CN202309277U - Brushless motor - Google Patents
Brushless motor Download PDFInfo
- Publication number
- CN202309277U CN202309277U CN2011204056807U CN201120405680U CN202309277U CN 202309277 U CN202309277 U CN 202309277U CN 2011204056807 U CN2011204056807 U CN 2011204056807U CN 201120405680 U CN201120405680 U CN 201120405680U CN 202309277 U CN202309277 U CN 202309277U
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- rotor
- stator
- end cap
- magnet
- brushless electric
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model relates to a brushless motor, comprising a stator and a rotor, wherein the stator comprises an outer shell and an end cover which is fixed at one end of the outer shell, and also comprises an iron core and a winding which is wound around the iron core, the rotor comprises a permanent magnet which is opposite to the winding of the stator, one end of the outer shell, close to the end cover, is provided with a flanging, the flanging presses against the outer side of the end cover, therefore, the end cover is fixed on the outer shell, and the size of the flanging along the peripheral direction of the motor is larger than half of circumference of the end cover. According to the utility model, a long flange is arranged at one end of the outer shell close to the end cover and presses against the outer side of the end cover, therefore, the outer shell and the end cover are fixed to be firmer, the whole rigidity of the motor is increased, and the noise which is caused in the using process of the motor can be reduced.
Description
Technical field
The utility model relates to a kind of brushless electric machine.
Background technology
Existing brushless electric machine; Fixed form between motor housing and the end cap adopts usually and establishes bayonet socket on the shell; End cap is established fixture block, after the fixture block of end cap is put into bayonet socket, utilizes instrument at the both sides of bayonet socket punching press shell edge again; Make the housing parts that is positioned at the bayonet socket both sides be pressed against the outside of end cap, and shell and end cap are fixed.
Yet, the existing brushless electric machine of this kind, shell and end cap are fixing insecure, the integral rigidity of motor is lower, motor in use, thereby the bigger vibrations of easy generation produce noise.
The utility model aims to provide a kind of brushless electric machine of novel overcome the problems referred to above.
Summary of the invention
The utility model provides a kind of brushless electric machine; Comprise stator and rotor; Said stator comprises shell and the end cap that is fixed in shell one end, and said stator also comprises iron core and be around in the winding on the iron core that said rotor comprises permanent magnet; Said magnet and stator winding are relative; Said shell is provided with flange near an end of end cap, thereby said flange is fixed to shell to inwardly being pressed against the said end cap outside with end cap along motor shaft, and said flange is along half the greater than the end cap girth of the size of motor circumferencial direction.
Preferably, the periphery of said end cap is established some projections, and said shell is established some bayonet sockets near an end of end cap, and each projection snaps in the corresponding bayonet socket.
Preferably, said rotor also comprises rotor core, and the periphery of said rotor core is established some location notchs, and said magnet is fixed in core exterior surface, and border between said adjacent pole and said location notch are underlapped along rotor radial.
Preferably, said magnet comprises several magnetic poles, and the borderline phase between adjacent pole tilts to the rotor center axis.
Preferably, the inclination angle on the border between said adjacent pole is θ, and the scope of said tiltangle is (θ r, 2 θ r), and wherein, θ r is an electrical degree, the least common multiple of θ r=180x rotor magnetic pole number/rotor magnetic pole number and stator magnet number of poles.
Preferably, said iron core comprises yoke portion and the tooth portion of radially extending from yoke portion, and said yoke portion width is Wy, and tooth portion width is Wt, relation below Wy and Wt satisfy: 1＜Wy/Wt＜1.3.
Preferably, said iron core comprises yoke portion and the tooth portion of radially extending from yoke portion, and the width of said tooth portion is Wt, and said tooth portion is Ws along stator height radially, relation below Wt and Ws satisfy: 0.35＜Wt/Ws＜0.5.
Preferably, said flange along the size of motor circumferencial direction greater than 80% of end cap girth.
The utility model provides a kind of brushless electric machine also is provided; Comprise stator and rotor, said stator comprises shell and the end cap that is fixed in shell one end, and said stator also comprises stator core and is around in the winding on the iron core; Said rotor comprises rotor core and permanent magnet; It is peripheral and relative with stator winding that said magnet is fixed in rotor core, and said magnet is annular, comprises several magnetic poles; The periphery of said rotor core is established some location notchs, and the starting point that magnetizes of each magnetic pole departs from the center of adjacent positioned groove along periphery of rotor.
Preferably, said magnet forms 4 magnetic poles, and said stator core comprises 6 teeth, and the location notch number on the said rotor core equals the rotor magnetic pole number, and the deflecting angle that magnetizes between starting point and the adjacent positioned groove of each magnetic pole is 10 to 20 degree mechanical angles.
Preferably, the borderline phase between adjacent pole tilts to the rotor center axis.
Embodiment that the utility model is lifted has following beneficial effect: shell is provided with long flange near an end of end cap; Be pressed against the end cap outside; Thereby make shell and end cap fixing more firm, the integral rigidity of motor is improved, thus the noise that produces can reduce motor application the time; The starting point that magnetizes of each rotor magnetic pole departs from the center certain angle of corresponding location notch along periphery of rotor, can eliminate the harmonic components that location notch causes, thereby reduces the noise that motor produces.
In order further to understand the characteristic and the technology contents of the utility model, see also following detailed description and accompanying drawing, yet institute's accompanying drawing only provides reference and explanation usefulness, is not to be used for the utility model is limited about the utility model.
Description of drawings
In the accompanying drawing:
Fig. 1 is the sketch map of the brushless electric machine of the utility model one embodiment;
Fig. 2 is the stator core of brushless electric machine shown in Figure 1 and the end view of rotor magnet;
Fig. 3 is the end view of the stator core of brushless electric machine shown in Figure 1;
Fig. 4 is the schematic perspective view of the rotor magnet of brushless electric machine shown in Figure 1;
Shown in Figure 5 is the schematic perspective view of the rotor core of brushless electric machine shown in Figure 1;
Shown in Figure 6 is the rotor core of brushless electric machine shown in Figure 1 and the schematic perspective view of magnet, has removed a magnetic pole among the figure so that clearly illustrate border and the relation between the iron core location notch between adjacent pole;
Shown in Figure 7 is the end view of Fig. 6.
Embodiment
Below in conjunction with accompanying drawing, describe in detail through embodiment the utility model, the technical scheme that makes the utility model and other beneficial effects is obvious.
See also Fig. 1 to Fig. 4; The utility model provides a kind of brushless electric machine; Comprise stator and the rotor that is installed in the stator; Said stator comprises shell 10 and the end cap 20 that is fixed in shell one end, and said stator also comprises the stator core 30 that is fixed in shell 10 inner surfaces and is around in the winding 40 on the iron core 30.Said rotor comprises rotating shaft 50, be fixed to the rotor core 60 in the rotating shaft 50 and fixedly be attached at the annular permanent magnnet 70 on rotor core 60 surfaces, and said magnet 70 is relative with stator winding.
See also Fig. 1, said shell 10 is cylindric, comprises a blind end and an openend, the openend of the said shell 10 of said end cap 20 sealings.Preferably, the openend of said shell 10 is provided with flange 12, and said flange 12 radially extends internally from the axial end of shell 10, thereby the outside that inwardly is pressed against said end cap 20 vertically is fixed to shell 10 with end cap 20.Preferably, said flange 12 is along half the greater than end cap 20 girths of the length of motor circumferencial direction.In this enforcement, said flange 12 along the length of motor circumferencial direction greater than 80% of end cap 20 girths, like this, fixing more firm between shell 10 and the end cap 20, the integral rigidity of motor is improved, thus the noise that produces can reduce motor application the time.
Preferably, radially to the some projections 22 of peripheral hardware, the openend of said shell 10 is established some bayonet sockets 14 in the neighboring of said end cap 20, and each projection 22 snaps in the corresponding bayonet socket 14, thereby the circumferencial direction of end cap 20 is located.
See also Fig. 2 and Fig. 3, said stator core 30 comprises yoke portion 32 and the tooth portion 34 that radially extends internally from yoke portion 32.Preferably, the ratio of the width W y (along stator size radially) of said yoke portion 32 and the width W t of tooth portion 34 concerns below satisfying: 1＜Wy/Wt＜1.3.Said tooth portion 34 representes with Ws along stator height radially, relation below Wt/Ws satisfies: 0.35＜Wt/Ws＜0.5.
See also Fig. 4 to Fig. 7, the cross section of said rotor core 60 is the plum blossom shape, and the periphery is provided with some location notchs 62; Said location notch 62 runs through whole iron core 60 vertically; Preferably, the cross section of said location notch 62 is semicircle, and the number of said location notch 62 equals the number of magnetic poles of magnet 70.
Said rotor magnet 70 comprises several magnetic poles; Border 72 relative rotor center axis Z tilt angle theta between adjacent pole; The tiltangle of alleged magnetic pole is meant among this paper: in the same end face of rotor core 60 and magnet 70; Angle between the projection of terminal in said end face on the origin or beginning on the border 72 between adjacent pole and same border 72, the inclination angle is an electrical degree here, the preferable range of said tiltangle is (θ r; 2 θ r), the least common multiple of θ r=180x rotor magnetic pole number/rotor magnetic pole number and stator magnet number of poles.
In the present embodiment, θ r=180x4/12=60 degree electrical degree, the preferable range of tiltangle are that 60 degree are to 120 degree.
Fig. 7 shows the inclination angle of skewed-rotor and the deflecting angle between starting point and the adjacent positioned groove of magnetizing.
See also Fig. 7; End face along rotor core 60 and magnet 70; The starting point that magnetizes of each magnetic pole departs from the center certain angle of a corresponding adjacent positioned groove 62 along periphery of rotor, that is: β forms an angle between the line between starting point and rotor center of magnetizing of the center of said location notch 62 and line between rotor center and adjacent pole.Preferably, said angle β is 10 to 20 degree, and in the present embodiment, said deflecting angle is 15 degree, and deflecting angle is a mechanical angle here.The starting point that magnetizes of magnetic pole departs from the center certain angle of corresponding location notch 62 along periphery of rotor; So that border between adjacent pole 72 and location notch 62 stagger (being that both are underlapped along rotor radial); Can eliminate the harmonic components that location notch 62 causes, thereby reduce the noise that motor produces.
Be appreciated that ground, above-mentioned annular magnet 70 can be an integral type magnet, can also be combined into annular by some arc-shaped magnets.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (11)
1. brushless electric machine; Comprise stator and the rotor that is positioned at stator, said stator comprises shell and the end cap that is fixed in shell one end, and said stator also comprises iron core and is around in the winding on the iron core; Said rotor comprises permanent magnet; Said magnet and stator winding are relative, it is characterized in that, said shell is provided with flange near an end of end cap; Thereby said flange is fixed to shell to inwardly being pressed against the said end cap outside with end cap along motor shaft, and said flange is along half the greater than the end cap girth of the length of motor circumferencial direction.
2. brushless electric machine as claimed in claim 1 is characterized in that the periphery of said end cap is established some projections, and said shell is established some bayonet sockets near an end of end cap, and each projection snaps in the corresponding bayonet socket.
3. brushless electric machine as claimed in claim 1; It is characterized in that said rotor also comprises rotor core, the periphery of said rotor core is established some location notchs; Said magnet is fixed in core exterior surface, and border between said adjacent pole and said location notch are underlapped along rotor radial.
4. brushless electric machine as claimed in claim 1 is characterized in that said magnet is annular magnet, comprises several magnetic poles, and the borderline phase between adjacent pole tilts to the rotor center axis.
5. brushless electric machine as claimed in claim 4 is characterized in that, the inclination angle on the border between said adjacent pole is θ; The scope of said tiltangle is (θ r, 2 θ r), wherein; θ r is an electrical degree, the least common multiple of θ r=180x rotor magnetic pole number/rotor magnetic pole number and stator magnet number of poles.
6. brushless electric machine as claimed in claim 1 is characterized in that; Said iron core is fixed in inner surface of outer cover, comprises yoke portion and the tooth portion that radially extends internally from yoke portion, and said yoke portion width is Wy; Tooth portion width is Wt, relation below Wy and Wt satisfy: 1＜Wy/Wt＜1.3.
7. brushless electric machine as claimed in claim 1; It is characterized in that; Said iron core is fixed in inner surface of outer cover, comprises yoke portion and the tooth portion that radially extends internally from yoke portion, and the width of said tooth portion is Wt; Said tooth portion is Ws along stator height radially, relation below Wt and Ws satisfy: 0.35＜Wt/Ws＜0.5.
8. like each described brushless electric machine of claim 1 to 7, it is characterized in that, said flange along the length of motor circumferencial direction greater than 80% of end cap girth.
9. a brushless electric machine comprises stator and rotor, and said stator comprises shell and the end cap that is fixed in shell one end; Said stator also comprises the stator core that is installed in the shell and is around in the winding on the iron core; Said rotor comprises rotor core and permanent magnet, and it is peripheral and relative with stator winding that said magnet is fixed in rotor core, it is characterized in that; Said magnet is annular; Comprise several magnetic poles, the periphery of said rotor core is established some location notchs, and border between said adjacent pole and said location notch are underlapped along rotor radial.
10. brushless electric machine as claimed in claim 9; It is characterized in that; Said magnet forms 4 magnetic poles; Said stator core comprises 6 teeth, and the location notch number on the said rotor core equals the rotor magnetic pole number, and the deflecting angle that magnetizes between starting point and the adjacent positioned groove of each magnetic pole is 10 to 20 degree mechanical angles.
11., it is characterized in that the borderline phase between adjacent pole tilts to the rotor center axis like claim 9 or 10 described brushless electric machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204056807U CN202309277U (en) | 2011-10-14 | 2011-10-14 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204056807U CN202309277U (en) | 2011-10-14 | 2011-10-14 | Brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309277U true CN202309277U (en) | 2012-07-04 |
Family
ID=46378090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204056807U Expired - Lifetime CN202309277U (en) | 2011-10-14 | 2011-10-14 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309277U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048688A (en) * | 2015-08-31 | 2015-11-11 | 江苏凯德电控科技有限公司 | Assembly structure for cover board and housing of motor |
-
2011
- 2011-10-14 CN CN2011204056807U patent/CN202309277U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048688A (en) * | 2015-08-31 | 2015-11-11 | 江苏凯德电控科技有限公司 | Assembly structure for cover board and housing of motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |