CN100373752C - Low speed brushless DC motor for automatic door - Google Patents
Low speed brushless DC motor for automatic door Download PDFInfo
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- CN100373752C CN100373752C CNB2003101090416A CN200310109041A CN100373752C CN 100373752 C CN100373752 C CN 100373752C CN B2003101090416 A CNB2003101090416 A CN B2003101090416A CN 200310109041 A CN200310109041 A CN 200310109041A CN 100373752 C CN100373752 C CN 100373752C
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- low speed
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- rotor
- automatically
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Abstract
The present invention relates to a low speed brushless DC motor used for automatic doors. The low speed brushless DC motor comprises stators and rotors, wherein the round wall of an iron core of a rotor is provided with multiple pairs of magnetic steels and the magnetic steels form a salient pole type magnetic pole; a gap is left between two adjacent magnetic steels. The present invention is characterized in that the gap between two adjacent magnetic steels is oblique, namely, an angle is formed between the gap and a rotating shaft of the rotor; the optimum angle between the gap between two adjacent magnetic steels on the iron core of the rotor and the rotating shaft of the rotor is from 10 DEG to 22 DEG. Compared with the prior art, through consulting the structure of a stepping motor and an oblique setting of the gap between the adjacent magnetic steels, the present invention has the advantages of making a magnetic field continuous along the circumference, overcoming slow pulsation and vibration, realizing low-speed and large torque output and eliminating stepping phenomenon. The present invention is suitable for being used as motive power of an automatic door, and consequently, the present invention thoroughly solves noise problem caused by a retarding mechanism and the cost is reduced; furthermore, through lengthening the diameter and shortening the axial length, the present invention not only ensures output power, but also decreases the depth of the installation space so that the door after installation looks more beautiful.
Description
Technical field
The present invention relates to a kind of brshless DC motor, particularly a kind of low speed brushless DC motor that is used for automatically-controlled door.
Background technology
At present, the parallel-moving type automatically-controlled door be usually used in hotel, shop, bank, station, harbour, etc. special occasions such as public arena and hospital operating room, sterile production workshop, generally comprise swing leaf and the cabinet that is positioned at its top, be provided with motor and driving mechanism in the cabinet, during use, swing leaf is removed to one side under driving mechanisms control at motor.The motor that adopts in the existing automatically-controlled door is generally brush direct current machine and high-speed brushless DC electromotor at a high speed, there is the brush direct current machine to exist because of brush is arranged, thereby useful life is short and the generation electric spark progressively is eliminated, the brshless DC motor that adopts in the automatically-controlled door is generally 3000 rev/mins high-speed brushless DC electromotor at present, this high speed direct current machine winding is generally two utmost point stator winding, rotor adopts the hidden pole type magnetic pole, because diameter is less, therefore in order to have enough driving forces, general by in the axial direction with the size lengthening of rotor and stator, and by adopting bigger worm and gear and the gear reduction of speed reducing ratio to improve moment, its shortcoming is, decelerator and motor overall dimensions are longer in the axial direction, original installation site with regard to no small controller has accounted for, so controller can only be placed on the back of driving belt, cause automatic door machine case to thicken, and other positions in cabinet also have a lot of free spaces, and swing leaf itself is thinner relatively, thereby cabinet is visually very unbecoming with moving door after installation.
On the other hand, the existence of reducing gear can cause certain noise, along with the time growth noise that uses can be increasing, particularly along with the raising of people's living standard, the increase of living space, the isolating door of balcony, parlor, kitchen, toilet adopts automatically-controlled door progressively to become the market demand in the house, and the existence of big noise becomes automatically-controlled door and enters one of the major obstacle in house ornamentation market.A direct way eliminating noise is not adopt reducing gear, and directly by the low speed brshless DC motor of big moment as power, in the prior art, stepping motor is exactly the bigger low speed brshless DC motor of a kind of moment, but low cruise, directly drive load, its rotor is made up of Hard Magnetic or soft magnetic material, on the perisporium of iron core, be provided with many to vertical salient pole type magnetic pole, leave the gap between each adjacent pole, thereby make the magnetic field of formation upwards interrupted in week, therefore reach the stepping effect, but it has tangible oscillation phenomenon when stepping at a slow speed, and just its stepping effect and at a slow speed the vibration during stepping be not suitable for this stepping motor directly as the driving mechanism of automatically-controlled door.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of novel low speed brshless DC motor that is used for automatically-controlled door at above-mentioned prior art present situation, and its moment is big and the output of continuous rotation arranged.
The further technical problem to be solved of the present invention provides the less low speed brshless DC motor that is used for automatically-controlled door of a kind of required fitting depth.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the low speed brshless DC motor that is used for automatically-controlled door includes stator and rotor, this rotor along its iron core perisporium be provided with a plurality of magnet steel of alternating polarity and constitute many to the salient pole type magnetic pole, leave the gap between each adjacent pole, it is characterized in that the gap between the described adjacent pole is oblique, that is, the rotating shaft shape of this gap and described rotor in an angle.
The rotating shaft angle of gap on the described rotor core between the adjacent pole and rotor is good with 16 °～22 °.
Described epitrochanterian magnet steel is good with 4～8 pairs; The iron core of described stator can adopt by the circular silicon steel sheet closed assembly that strikes out spline and form, and the teeth groove number is good with 24～36, and stator winding is very good with 8～12, winding configuration can adopt individual layer or double-deck lap wound or ripple around.
In order to be adapted at the application on the automatically-controlled door, the rated speed of this motor is to be not more than 750 rev/mins for good.
For the thickness with automatically-controlled door matches, and the while does not influence its power output, not containing the output shaft part in the described rotor core is of a size of: do not contain axial length (being the thickness)≤40mm of output shaft part in 20mm≤rotor core, do not contain the diameter≤80mm of output shaft part in 40mm≤rotor core.
Compared with prior art, the present invention is by using for reference the structure of stepping motor, and the oblique setting by gap between the adjacent pole, make magnetic field circumferentially become continuously, overcome and pulsed at a slow speed and vibrate, thereby not only realized the big moment output of low speed but also eliminated the stepping phenomenon, very suitable direct power as automatically-controlled door, need not to establish worm and gear and gear reduction again, thereby thoroughly solve the noise problem that causes because of reducing gear, cost also reduces greatly, and the present invention is by increasing diameter, shorten axial length, both guaranteed power output, reduced the degree of depth of installing space again, made that the automatically-controlled door after installing was more attractive in appearance.
Description of drawings
Fig. 1 is the structure cross-sectional schematic of the embodiment of the invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
The perspective view of Fig. 3 Fig. 1 rotor.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 3, be one embodiment of the present of invention, this low speed brshless DC motor that is used for automatically-controlled door is made of housing 1 and the stator 2, the rotor 3 that are positioned at it;
Be bonded with the 4 pairs of Nd-Fe-B magnet steels 31 of alternating polarity on the iron core perisporium of rotor 3 and constitute the salient pole type magnetic pole, leave gap 33 between each adjacent magnet steel 31, and this gap 33 is oblique, that is, form one 16 °～22 ° angle with the rotating shaft of rotor; Described 31 magnet steel logarithms and required rated speed are inversely proportional to, and are good with 4～8 pairs generally; 32 is output shaft among the figure, and 4 is bearing;
The iron core 21 of described stator 2 adopts and is formed by the circular silicon steel sheet closed assembly that strikes out spline, and the teeth groove number is 24, and stator winding 22 is 8 utmost points, adopt individual layer or double-deck lap wound or ripple around; Described teeth groove number and required rated speed are inversely proportional to, and are good with 24～36 generally, and stator winding is very good with 8～12.
The rated speed of motor is 750 rev/mins in the present embodiment.
Claims (7)
1. low speed brshless DC motor that is used for automatically-controlled door, include stator and rotor, this rotor along its iron core perisporium be provided with a plurality of magnet steel of alternating polarity and constitute many to the salient pole type magnetic pole, leave the gap between each adjacent pole, it is characterized in that the gap between the described adjacent pole is oblique, that is, the rotating shaft shape of this gap and described rotor in an angle.
2. the low speed brshless DC motor that is used for automatically-controlled door according to claim 1, the rotating shaft angle that it is characterized in that the gap between the adjacent pole and rotor on the described rotor core with 16 °～22 ° for good.
3. the low speed brshless DC motor that is used for automatically-controlled door according to claim 1 is characterized in that described epitrochanterian magnet steel is 4～8 pairs.
4. the low speed brshless DC motor that is used for automatically-controlled door according to claim 1 is characterized in that the iron core employing of described stator is formed by the circular silicon steel sheet closed assembly that strikes out spline, and the quantity of described teeth groove is 24～36, and stator winding is 8～12 utmost points.
5. the low speed brshless DC motor that is used for automatically-controlled door according to claim 4, it is characterized in that described stator winding adopt individual layer or double-deck lap wound or ripple around.
6. according to arbitrary described low speed brshless DC motor that is used for automatically-controlled door in the claim 1 to 5, it is characterized in that: do not contain the axial length≤40mm of output shaft part in 20mm≤described rotor core, do not contain the diameter≤80mm of output shaft part in 40mm≤described rotor core.
7. according to arbitrary described low speed brshless DC motor that is used for automatically-controlled door in the claim 1 to 5, it is characterized in that its rated speed is for being not more than 750 rev/mins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101090416A CN100373752C (en) | 2003-12-01 | 2003-12-01 | Low speed brushless DC motor for automatic door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101090416A CN100373752C (en) | 2003-12-01 | 2003-12-01 | Low speed brushless DC motor for automatic door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1547315A CN1547315A (en) | 2004-11-17 |
| CN100373752C true CN100373752C (en) | 2008-03-05 |
Family
ID=34334992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101090416A Expired - Fee Related CN100373752C (en) | 2003-12-01 | 2003-12-01 | Low speed brushless DC motor for automatic door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100373752C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010279156A (en) * | 2009-05-28 | 2010-12-09 | Fuji Electric Systems Co Ltd | Permanent magnet type rotating machine |
| CN102810965A (en) * | 2012-07-19 | 2012-12-05 | 春城控股集团有限公司 | Brushless permanent magnet direct current motor with windings on sunken skewed slots reserved on crowns of stator and rotor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2309663Y (en) * | 1997-09-18 | 1999-03-03 | 任玉发 | High-efficiency rare-earth permanent-magnetic brushless dc electric machine |
| CN2489511Y (en) * | 2001-07-26 | 2002-05-01 | 马加良 | Permanent-magnet brushless DC machine for motor-driven vehicle |
-
2003
- 2003-12-01 CN CNB2003101090416A patent/CN100373752C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2309663Y (en) * | 1997-09-18 | 1999-03-03 | 任玉发 | High-efficiency rare-earth permanent-magnetic brushless dc electric machine |
| CN2489511Y (en) * | 2001-07-26 | 2002-05-01 | 马加良 | Permanent-magnet brushless DC machine for motor-driven vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1547315A (en) | 2004-11-17 |
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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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080305 Termination date: 20121201 |