CN100530909C - Brushless DC electric machine and stator thereof - Google Patents
Brushless DC electric machine and stator thereof Download PDFInfo
- Publication number
- CN100530909C CN100530909C CNB2005101028838A CN200510102883A CN100530909C CN 100530909 C CN100530909 C CN 100530909C CN B2005101028838 A CNB2005101028838 A CN B2005101028838A CN 200510102883 A CN200510102883 A CN 200510102883A CN 100530909 C CN100530909 C CN 100530909C
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- pole piece
- brushless motor
- stator
- rotor
- magnetic pole
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Abstract
This invention relates to a brushless DC motor and its stator, in which, the up and down magnetic pole plates of the stator have several extending parts extending to the opposite direction, the part of the up pole plate and that of the down pole plate are staggeredly arrayed not essentially contacted to each other, for example: the end of every extending part of said up pole plate can form a locating unit outward located below the magnetic ring of the rotor to increase the magnetic action to said ring, the other example is that said locating unit is formed between the extending parts of said lower magnetic pole plate and extend below the ring of the rotor to provide axial attraction to stabilize rotation of said rotor.
Description
Technical field
The present invention relates to a kind of brshless DC motor and stator thereof, the particularly a kind of brshless DC motor and stator thereof that the stable rotation of rotor balancing can be provided or increase the rotor rotary power.
Background technology
But the brshless DC motor that general conventional balance is located, as No. the 421369th, TaiWan, China patent announcement " brshless DC motor balance location and pole piece structure thereof ", be to utilize the magnetic pole of the lower magnetic pole sheet in stator structure to be extended with pin, pin is supported a ring body, the annular permanent magnnet of this ring body and rotor forms attraction, so that rotor can turn round reposefully.Yet, though this kind stator structure can overcome rotor the rotating shaft deflection, rock, problem such as friction and noise, the axial attraction of this kind structure itself can cause the difficulty of rotor rotation.If will promote electric efficiency only can will use under limited motor space and be not easy like this by increasing the storehouse quantity of pole piece.
Another kind of conventional brshless DC motor as No. the 4891567th, United States Patent (USP) " brshless DC motor with external rotor ", is that the upper and lower pole piece in the motor stator structure is bent to relative direction respectively, forms the arrangement of complementary state.Utilize this mode, can increase the magnetic pole area with the rotor magnet effect effectively, yet this motor has bigger vibratory output at axial direction, rotor can't stably rotate.
The disappearance that the present invention is directed to above-mentioned conventional brshless DC motor improves, and the present situation that rotating speed need promote in order to make the trend microminiaturization in response to motor.It below is brief description of the present invention.
Summary of the invention
One object of the present invention is to provide a kind of dc brushless motor with magnetic balanced location stator structure, the outer peripheral edges of the upper and lower pole piece body of this stator compartment of terrain respectively have several extensions that relative direction is vertically extended, can effectively increase the magnetic pole area, wherein more extend to form several feet at this lower magnetic pole sheet body, each pin outwards forms the location ring body, makes this location ring body and this time disk body not at grade and be positioned at the magnet ring below of rotor; Motor because the magnet ring polarity of these location ring bodies and this rotor is different, can produces axial attraction, thereby stablize the rotation of this rotor when running.
In order to achieve the above object, the present invention proposes a kind of dc brushless motor with magnetic balanced location stator structure, it mainly comprises rotor and the stator that is coupled with this rotor.This rotor roughly is the cylindric of end opening, and its madial wall is provided with magnet ring, and a side center of blind end is provided with rotating shaft; This stator comprises flux sleeve, is looped around the coil in this flux sleeve outside and upper pole piece and the lower magnetic pole sheet that is folded in these coil both sides respectively, and wherein the magnet ring of this upper and lower pole piece and this rotor produces magnetic action.The outer peripheral edges of the upper and lower pole piece body of this stator compartment of terrain respectively have several extensions that relative direction is vertically extended.The extension of this upper and lower pole piece is the arrangement that misplaces contiguously of entity not respectively, can effectively increase the magnetic pole area like this, the structure place that does not wherein have extension at this lower magnetic pole sheet body forms several feet, each pin outwards forms the location ring body, makes this location ring body and this time disk body not at grade and be positioned at the magnet ring below of this rotor; Motor because the magnet ring polarity of these location ring bodies and this rotor is different, can produce axial attraction when running, and the rotation of this rotor of balance and stability.
Another object of the present invention is to propose a kind of dc brushless motor, the outer peripheral edges of the upper and lower pole piece body of its stator have several extensions that relative direction is vertically extended respectively, can effectively increase the magnetic pole area, wherein the end at each extension of this upper pole piece forms keeper more outwardly, this keeper when static state and the magnet ring of the rotor of this motor produce magnetic action and attraction be provided; When motor rotation, also can produce auxiliary force thus and increase the rotor rotary power.
For achieving the above object, the present invention proposes a kind of dc brushless motor, it comprises rotor and the stator that is coupled with this rotor.This rotor roughly is the cylindric of end opening, and its madial wall is provided with magnet ring, and a side center of blind end is provided with rotating shaft; This stator comprises flux sleeve, is looped around the coil in this flux sleeve outside and upper pole piece and the lower magnetic pole sheet that is folded in these coil both sides respectively, and wherein the magnet ring of this upper and lower pole piece and this rotor produces magnetic action.The outer peripheral edges of the upper and lower pole piece body of this stator have several extensions that relative direction is vertically extended respectively, the extension of this upper and lower pole piece is the arrangement that misplaces contiguously of entity not respectively, can effectively increase the magnetic pole area like this, wherein the end at each extension of this upper pole piece forms keeper more outwardly, this keeper when static state and the magnet ring of the rotor of this motor produce magnetic action and attraction be provided; When motor rotation, also can produce auxiliary force thus and increase the rotor rotary power.
For make above-mentioned and other purpose of the present invention, feature, and advantage can become apparent, a preferred embodiment cited below particularly, and conjunction with figs. elaborate.
Description of drawings
Fig. 1 is the three-dimensional exploded view of an embodiment of dc brushless motor rotor of the present invention and stator structure.
Fig. 2 is the dc brushless motor generalized section according to Fig. 1.
Fig. 3 is the three-dimensional exploded view of another embodiment of dc brushless motor rotor of the present invention and stator structure.
Fig. 4 is the dc brushless motor generalized section according to Fig. 3.
[primary clustering symbol description]
1,4: rotor 10,40: magnet ring
11,41: rotating shaft 2,5: stator
20,50: flux sleeve 21,51: coil
22,52: upper pole piece 221,521: the first extensions
220,230,520,530: axis hole 23,53: lower magnetic pole sheet
231,531: the second extensions 232: pin
233: location ring body 522: keeper
3,6: bearing pedestal 30,60: bearing
Embodiment
See also Fig. 1 and Fig. 2, the dc brushless motor with magnetic balanced location stator structure of the present invention, it comprise rotor 1, with the stator 2 of this rotor 1 coupling and fixing and accept the bearing pedestal 3 of this stator.
This rotor 1 roughly is the cylindric of end opening, and its madial wall is provided with magnet ring 10, and a side center of blind end is provided with rotating shaft 11.
This stator 2 comprises the flux sleeve 20 of hollow, the upper pole piece 22 and lower magnetic pole sheet 23 that is looped around the coil 21 in these flux sleeve 20 outsides and is folded in these coil 21 both sides respectively.This upper pole piece 22, lower magnetic pole sheet 23 produce magnetic action with the magnet ring 10 of this rotor 1.Wherein this upper pole piece 22, lower magnetic pole sheet 23 are made up of permeability magnetic material with the material of this flux sleeve 20, preferably are made up of silicon steel sheet; And this flux sleeve 20 can also utilize turning or cans.
The upper pole piece 22 body centers of this stator 2 have axis hole 220, this rotating shaft 11 is passed with bearing pedestal 3, and the outer peripheral edges compartment of terrain of these upper pole piece 22 bodies have several first extensions 221 that extend to these lower magnetic pole sheet 23 directions; These lower magnetic pole sheet 23 body centers have axis hole 230, this rotating shaft 11 is passed with bearing pedestal 3, and the outer peripheral edges of this lower magnetic pole sheet 23 also have several second extensions 231 that extend to this upper pole piece 22 directions in the compartment of terrain; This first extension 221, second extension 231 are respectively not the entity arrangement that misplaces contiguously.The position that does not wherein have second extension 231 at these lower magnetic pole sheet 23 bodies extends to form several feet 232, the end of this pin 232 is lower than the plane of these lower magnetic pole sheet 23 bodies, and each pin 232 more outside formation location ring body 233 makes this location ring body 233 be positioned at the magnet ring below of this rotor.The pin 232 of this upper pole piece 22, lower magnetic pole sheet 23, this first extension 221, second extension 231 and this lower magnetic pole sheet 23 and location ring body 233 can be respectively by punching press and bending and one-body molded.
This stator 2 is sheathed on this bearing pedestal 3 outsides, then is provided with at least one bearing 30 at these bearing pedestal 3 inwalls, in order to articulate the rotating shaft 11 that this extends to these bearing pedestal 3 inside.
When these stator 2 generations were excitatory, this upper pole piece 22 can produce different magnetic pole with this lower magnetic pole sheet 23.These upper pole piece 22 bodies produce repulsion and promote this rotor 1 rotation with the magnetic pole of its first extension 221 and the corresponding part of this magnet ring 10; These lower magnetic pole sheet 23 bodies can produce repulsion with the corresponding part of this magnet ring 10 and promote this rotor 1 rotation with its second extension 231 simultaneously.Yet, because the location ring body 233 of this lower magnetic pole sheet 23 is positioned at the below of the different part of magnetic pole of this magnet ring 10, thus axial attraction can be produced, but the rotation of this this rotor 1 of attraction balance and stability.
See also Fig. 3 and Fig. 4, it is another embodiment of dc brushless motor of the present invention, comprise rotor 4, with the stator 5 of this rotor 4 couplings and fixing and accept the bearing pedestal 6 of this stator.
This rotor 4 roughly is the cylindric of end opening, and its madial wall is provided with magnet ring 40, and a side center of blind end is provided with rotating shaft 41.
This stator 5 comprises the flux sleeve 50 of hollow, the upper pole piece 52 and lower magnetic pole sheet 53 that is looped around the coil 51 in these flux sleeve 50 outsides and is folded in these coil 51 both sides respectively, and this upper pole piece 52, lower magnetic pole sheet 53 produce magnetic action with the magnet ring 40 of this rotor 4.Wherein this upper pole piece 52, lower magnetic pole sheet 53 are made up of permeability magnetic material with the material of this flux sleeve 50, preferably are made up of silicon steel sheet; And this flux sleeve 50 can also utilize turning or cans.
The upper pole piece 52 body centers of this stator 5 have axis hole 520, this rotating shaft 41 is passed with bearing pedestal 6, and the outer peripheral edges compartment of terrain of these upper pole piece 52 bodies have several first extensions 521 that extend to these lower magnetic pole sheet 53 directions; These lower magnetic pole sheet 53 body centers have an axis hole 530, this rotating shaft 41 is passed with bearing pedestal 6, and the outer peripheral edges of this lower magnetic pole sheet 53 also have several second extensions 531 that extend to this upper pole piece 52 directions in the compartment of terrain; This first extension 521, second extension 531 are respectively not the entity arrangement that misplaces contiguously.Wherein the end at each extension 521 of this upper pole piece 52 forms keeper 522 more outwardly, makes this keeper 522 be positioned at magnet ring 40 belows of this rotor 4.The keeper 522 of this upper pole piece 52, this lower magnetic pole sheet 53, this first extension 521, this second extension 531 and this upper pole piece 52 can be respectively by punching press and bending and one-body molded.
This stator 5 is sheathed on this bearing pedestal 6 outsides, then is provided with at least one bearing 60 at these bearing pedestal 6 inwalls, extends to the rotating shaft 41 of these bearing pedestal 6 inside in order to pivot joint.
When these stator 5 generations were excitatory, this upper pole piece 52 can produce different magnetic pole with this lower magnetic pole sheet 53.These upper pole piece 52 bodies produce repulsion and promote this rotor 4 rotations with the magnetic pole of its first extension 521 and the corresponding part of this magnet ring 40; These lower magnetic pole sheet 53 bodies produce repulsion and promote this rotor 4 rotations with the corresponding part of its second extension 531 with this magnet ring 40 simultaneously.In addition, the keeper 522 of upper pole piece 52 more can increase the magnetic action area of upper pole piece 52 and produce auxiliary repulsion, and then increases the power of rotor rotation.
The above only is the preferred embodiments of the present invention, and the foregoing description only is to be used for explanation but not in order to limit the present invention, category of the present invention is defined by claim.All equivalent variations and modifications of doing according to claim of the present invention all should belong to scope of the present invention.
Claims (12)
1. dc brushless motor comprises:
Rotor, its inside is provided with magnet ring; And
Stator, it comprises:
Flux sleeve;
Coil, ring are located at this flux sleeve outside; And
One group of pole piece, it has upper pole piece and lower magnetic pole sheet at least, lay respectively at the top and the below of this flux sleeve, this upper pole piece has several first extensions that extends towards this lower magnetic pole sheet direction, and this lower magnetic pole sheet has several second extensions that extends towards this upper pole piece direction;
Wherein first extension of one of them of these upper pole pieces has a keeper, and this keeper is positioned at the below of this magnet ring of this rotor.
2. dc brushless motor as claimed in claim 1, wherein these first extensions and these second extensions are the not essence arrangement that misplaces contiguously each other.
3. dc brushless motor as claimed in claim 1, wherein this keeper radially extends from this first extension end of this upper pole piece.
4. dc brushless motor as claimed in claim 1, wherein this first extension and keeper are by punching press and bending and one-body molded.
5. dc brushless motor as claimed in claim 1, wherein these upper and lower pole pieces and this flux sleeve are made of permeability magnetic material.
6. dc brushless motor as claimed in claim 5, wherein this permeability magnetic material is a silicon steel sheet.
7. dc brushless motor as claimed in claim 5, wherein this flux sleeve is turning moulding or cans.
8. dc brushless motor as claimed in claim 1, wherein this upper pole piece and this lower magnetic pole sheet have an axis hole respectively, and these rotor central authorities have rotating shaft, can run through the axis hole of this upper pole piece and this lower magnetic pole sheet.
9. dc brushless motor as claimed in claim 8, this motor also comprises bearing pedestal, and this bearing pedestal inboard is provided with at least one bearing, and in order to accepting this rotating shaft, and this stator is sheathed on the outside of this bearing pedestal.
10. dc brushless motor as claimed in claim 1, wherein this upper pole piece, first extension and keeper are by punching press and bending and one-body molded.
11. the stator of a dc brushless motor, it comprises:
Upper pole piece has several axially extended first extensions and from the terminal keeper that outwards forms of each first extension;
The lower magnetic pole sheet has several axially extended second extensions, and these second extensions and first extension be the not entity arrangement that misplaces contiguously each other;
Flux sleeve, one of them end is linked to this upper pole piece, and another end is linked to this lower magnetic pole sheet; And
Coil, ring are located at this flux sleeve outside.
12. the stator of dc brushless motor as claimed in claim 11, wherein these several keepers are positioned at an end of this stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101028838A CN100530909C (en) | 2005-09-14 | 2005-09-14 | Brushless DC electric machine and stator thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101028838A CN100530909C (en) | 2005-09-14 | 2005-09-14 | Brushless DC electric machine and stator thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1933301A CN1933301A (en) | 2007-03-21 |
| CN100530909C true CN100530909C (en) | 2009-08-19 |
Family
ID=37878978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101028838A Expired - Fee Related CN100530909C (en) | 2005-09-14 | 2005-09-14 | Brushless DC electric machine and stator thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100530909C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114768629A (en) * | 2022-02-10 | 2022-07-22 | 苏州捷美电子有限公司 | Constant temperature oscillator |
| CN114768631A (en) * | 2022-02-10 | 2022-07-22 | 苏州捷美电子有限公司 | Constant temperature oscillator's drive assembly and constant temperature oscillator |
-
2005
- 2005-09-14 CN CNB2005101028838A patent/CN100530909C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1933301A (en) | 2007-03-21 |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20200914 |