CN1301078A - Brushless single phase motor - Google Patents
Brushless single phase motor Download PDFInfo
- Publication number
- CN1301078A CN1301078A CN00124745A CN00124745A CN1301078A CN 1301078 A CN1301078 A CN 1301078A CN 00124745 A CN00124745 A CN 00124745A CN 00124745 A CN00124745 A CN 00124745A CN 1301078 A CN1301078 A CN 1301078A
- Authority
- CN
- China
- Prior art keywords
- stator
- single phase
- brushless single
- hub
- outer cylinder
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- 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
- H02K1/14—Stator cores with salient poles
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Brushless Motors (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to a single phase brushless motor, wherein dead points are eliminated by making thicknesses of stator teeth asymmetrical under condition where the stator teeth maintain uniform air gap with magnet. The above stator teeth are mutually different in length and centers of length on circumference so that ultimately dead point removal is easily accomplished through conformation of making the thickness of stator teeth asymmetrical and at same time it becomes easy to adjust for optimum cogging force generation because cogging force varies according to asymmetry ratio of stator teeth.
Description
The present invention relates to a kind of brushless single phase motor, more particularly, keep under the state in uniform space, make its thickness form unsymmetric structure, thereby eliminate the brushless single phase motor at dead point at tooth that makes stator and magnet.
For those skilled in the art, well-known, in the miniature precision instruments such as general hard disk drive, CD drive, (cooling) fan, be used for the spindle motor of driving-disc or (cooling) fan, its kind has various.
Wherein, as for need not strict control in addition and with simple driving (cooling) fan of purpose etc., in order to reduce cost, adopt brushless motor mostly.
This brushless motor mostly is greatly and adopts magnet to be arranged on stator (3) star 3 phase type of drive radially, the now, when its structure is simplified, in order to increase economic efficiency, generally adopts single-phase or 2 phase type of drive.But, when adopting single-phase type of drive, have the deadly defect that hinders the dead point that starts.
Fig. 1 is the diagram of first embodiment that is mainly used in the existing brushless motor of fan.Hectograph framework (1) is set on base, and will adheres to printed circuit board (PCB) (2) in a side of this framework (1), and the fixture (1a) of the tube shape that setting is projected upwards at the central part of framework (1).
And the stator (3) that is laminated with some stator iron plates in the outer cylinder setting or the installation of fixture (1a), and on the radial several arms (3a) that single phase winding (4) are coiled in be formed on this stator (3).
The inside diameter setting of described fixture (1a) or installation rotating shaft (5), and cylinder hub (6) is installed at the end of this rotating shaft (5).
Described hub (6) is the terminal drum shape of extending downwards of its outer cylinder, and keeps even space and on the other side magnet (6a) in the inner cylinder setting of the prolongation end of extending and the terminal part of stator (3) downwards.
This hub (6) is not illustrated, and along its circumference blade is installed, in order to the function of performance fan motor.
Brushless single phase motor with said structure, stator (3) and the electric current of magnet (6a) by flowing through coil (4) work mutually, and motor produces actuating force by consequent electromagnetic force, and hub this moment (6) is rotated by actuating force.
On the one hand; structure from aforesaid brushless single phase motor; adopt single-phasely as being coiled in coil (4) on the stator (3), as shown in Figure 2, coil (4) can produce among the figure inserted tooth rotation effect shown in the dotted line in the coil rotation effect shown in the solid line and figure usually.
The synthetic rotation effect figure of this coil rotation effect and inserted tooth rotation effect is shown in solid line, owing to the synthetic rotation effect consistent rotation effect at zero point at zero point that has coil rotation effect zero, inserted tooth rotation effect and coil rotation effect hinders startup, therefore, usually the position that hinders motor start-up is called the dead point.
The inserted tooth rotation effect is as with respect to the rotation effect power that produces between the terminal part of stator (3) and the magnet (6a), and this inserted tooth rotation effect will stop and the coil rotation effect was synthesized on zero point, so that motor is able to abundant driving.
But, as shown in Figure 3, as making the stator tooth (3b) that is formed on arm (3a) terminal part keep uniform space, and make it to form symmetrical structure with magnet (6a), stator tooth (3b) will form the pole center state consistent with magnetic blow out centre.
That is, stator tooth (3b) is by the characteristic that keeps between the pole center of described magnet (6a) and stator tooth (3b) the magnetic center attracting mutually always, and always the some polarity with magnet (6a) interacts.
Like this, have an effect as the stator tooth (3b) and the some polarity of magnet (6a) of stator (3), radially producing mutual attraction or repulsive interaction between stator tooth (3b) and magnet (6a), therefore, hub (6) can not drive under fixing state fully.
So in order to eliminate the dead point of aforesaid synthetic rotation effect vanishing, the past proposes to improve the method for stator (3) structure as Fig. 4 and mode shown in Figure 5.
Yet, foregoing structure, polar centers with stator tooth (3b) is as the criterion, for the position with respect to magnet (6a) that makes stator tooth (3b) forms asymmetric, or it is asymmetric that space between the same magnet of stator tooth (3b) (6a) is formed, for this reason, and must be to the in addition accurate measuring and calculating of asymmetric amount, therefore, there is the drawback that reduces production efficiency.
The present invention invents in order to solve above-mentioned drawback, the purpose of its invention is for a kind of brushless single phase motor is provided: the part of the stator iron plate by cutting off stator tooth one side, so that stator tooth thickness forms is asymmetric, thereby be easy to eliminate the motor dead point.
In order to realize above-mentioned purpose of the present invention, providing a kind of is the brushless single phase motor of feature with following content, and it comprises: the fixture that projects upwards with the tube shape that is arranged on the base central part is shaped to the hectograph framework of one; Be arranged on described framework one side, and carry the printed circuit board (PCB) of power supply by the outside; The rotating shaft that is inserted in described fixture inside diameter and rotates by the bearing support; Be arranged on described rotating shaft upper end, and the downward hub that extends of top column jacket face; Attached to described hub inner cylinder and concentric with it magnet; Be arranged on the outer cylinder of described fixture, and the end lamination with the arm of radial extension has the stator iron plate that has stator tooth, and must get different length of stator tooth and different circumferential length center laminations, be formed centrally the stator of space unsymmetric structure in axle being, to eliminate the dead point.
The present invention is described in detail with reference to accompanying drawing by following, will understand the present invention better, and more fully understand each purpose of the present invention and advantage.In the accompanying drawing:
Fig. 1 is the cross-sectional side view of traditional single phase brushless motor;
Fig. 2 is the rotation effect oscillogram of traditional single phase brushless motor;
Fig. 3 is the a-a sectional drawing of Fig. 1;
Fig. 4 is the plane cross section of other embodiment of stator shown in the brushless single phase motor of Fig. 1;
Fig. 5 is the plane cross section of other embodiment of stator shown in the brushless single phase motor of Fig. 1;
Fig. 6 is the decomposing schematic representation of the brushless single phase motor that relates among the present invention;
Fig. 7 is the decomposing schematic representation of stator shown in the brushless single phase motor of Fig. 6;
Fig. 8 is the plane cross section of the brushless single phase motor that relates among the present invention;
Fig. 9 is the plane cross section of key diagram 8 operating states;
Figure 10-Figure 13 be shown in the schematic diagram of other embodiment of stator among the present invention;
Figure 14 is the rotation effect oscillogram among the present invention.
The preferred embodiments of the present invention are described below with reference to accompanying drawings.
The present invention relates to a kind of brushless single phase motor, more particularly, and with the stator tooth thickness formation unsymmetric structure of the some stator iron plates of lamination, to eliminate the brushless single phase motor at dead point.
As shown in Figure 6, the present invention is made of stator (120) and hub (130) substantially, and concerning stator (120), hub (130) is very similar to traditional approach by the structure of radially rotation.
That is, the tubular fixture (111) that is arranged on central part projects upwards, and connects as one with framework (110); And printed circuit board (PCB) passes through fixture (111) outer cylinder attached to these framework (110) one sides.
The power supply that described printed circuit board (PCB) (115) will be carried from the outside to the single phase winding that will be illustrated in the back (125) provide decide power supply.
And, be fixed with by which floor setting in printed circuit board (PCB) (115) upper end or be installed in the stator (120) that stator iron plate (120 ') lamination on the outer cylinder of fixture (111) forms.
Some arms (121) that radial direction is extended are housed on this stator (120) usually, and will coil single phase winding (125) on this arm (121).
The rotating shaft (140) that described stator (120) is rotated, the one end is inserted into fixture (111), and support rotation by bearing (141), the other end setting of this rotating shaft (140) or hub (130) is installed, and rotate in the lump with rotating shaft (140).
The rotary body that hub (130) conduct and the rotating shaft (140) of this moment rotates in the lump will form the prolongation end that the outer cylinder above it extends downwards.
Prolongation end of this hub (130) and stator (120) are kept institute's fixed gap, and will form the shape of outsourcing.
On the other hand, the prolongation end outer cylinder of described hub (130) will form the blade of some radial directions, so that produce wind-force during hub (130) rotation, thereby more give full play to the function of fan motor, in addition, do not add diagram, various forms of power transmission members are installed by going up at hub (130), be driving-belt or gear etc., can drive other devices.
The inner cylinder that prolongs the end at described hub (130) is adhered to and is had concentric with it magnet (135), and this magnet (135) and be formed on and keep a fixed gap between the arc stator tooth (122) of stator (120) arm (121) end, and produce magnetic force by both interactions.
From aforesaid structure, the present invention has following feature: the objective of the invention is in order to obtain to eliminate the inserted tooth rotation effect at the dead point that occurs in the brushless single phase motor (100), and in order to obtain desirable inserted tooth rotation effect, must cut off and be formed on the arc stator tooth (122) of stator (120) arm (121) end, and make its thickness have asymmetrical structure.
That is, described stator (120) is formed centrally the space unsymmetric structure in axle being, hinders electric motor driven dead point thereby eliminate.
Have the stator tooth (122) of above-mentioned feature, will form unsymmetric structure by different shape, and will form in the present invention as Fig. 7-structure shown in Figure 13.
As shown in Figure 7, stator (120) will form following structure: will form a stator iron plate (120 ') of arc stator tooth (122) on the end of some radial arms (121), and press with axle (V) and form the vertical direction lamination, and make it to become one.Cutting off the part of described stator tooth (122) one ends at this, is the center with arm (121) center line (m), will form asymmetrical structure.
Promptly, described stator (120) has following structure: the circumferential length that forms the stator tooth (122) on each stator iron plate (120 ') is different, and the iron plate of lamination in addition under the state of the center of its circumferential length, thereby one of make side form the stage shape in other positions.
As shown in figure 10, cut off the stator iron plate (120 ') of upper end and bottom simultaneously, can remove the part iron plate.As shown in figure 11, which floor and an iron plate (120 ') of (V) vertical direction lamination stator (120) have; Each stator tooth (122) of stator iron plate (120 ') has identical length, and " a " expression of its circumferential length, and concerning arm (121) center line (m), it is straggly mutually to form each stator tooth (122) center, to make it to form unsymmetric structure.
On the contrary, as shown in Figure 12 and Figure 13, do not have foregoing structure as stator (120) by which floor stator iron plate (120 ') lamination, and when forming with the stator iron plate of integral body, as press the transversely cutting stator tooth (122, h), be the center with section (c), varying in size of stator tooth (122a), (122b) up and down, thus make whole stator tooth (122) will form unsymmetric structure.
Promptly, pressing direction of principal axis (v) as the Plane Angle of normal, when cutting off described stator tooth (122a), (122b), is the center with section (c), the shape of stator tooth (122a), (122b) has nothing in common with each other up and down, is the space unsymmetric structure at center thereby stator (120) is constituted with the axle.
As press said structure and form stator (120), will form unsymmetric structure with respect to the basal area of the stator tooth (122) of magnet (135), promptly be the center with the axle, formation space unsymmetric structure.
Therefore, stator (120) is the center with arm (121), and the both side ends thickness of stator tooth (122) forms asymmetric, so the active force between aspectant stator tooth (122) and the magnet (135) will produce deviation.
At this, as shown in Figure 8, a steady state value is always kept in the space between described stator (120) and the magnet (135), and forms symmetry with respect to the corresponding surface of the stator tooth (122) of described magnet (135) from polar centers, keeps stable moving to guarantee magnetic flux.
When cut off constituting stator tooth (122) one side stator iron plates (120 '), as previously mentioned, for form and magnet (135) between stable magnetic circuit, must keep more than one stator iron plate (120 ') at least, and can adjust cut position.
The present invention with structure like this has following feature: pass through printed circuit board (PCB) (115) as the power supply of being carried by the outside, be fed on the coil (125) of the arm (121) that is coiled in stator (120), each stator tooth (122) at stator (120) will form magnetic field, and the magnetic field of this moment and be positioned at and will produce interaction between the magnetic field of magnet (135) of relative each stator tooth (122) direction, and by this institute interact to take place and decide magnetic force, thereby production revolving force.
At this moment, the magnetic center of each stator tooth (122) of stator (120), move to the direction of not cutting off stator iron plate (120 ') as yet from polar centers, in a word, the characteristic that is consistent according to the magnetic center of the polar centers of magnet (135) and stator tooth (122), magnet (135) will reach state as shown in Figure 9 by the rotation of decide angle.
Therefore, as single phase winding (125) galvanization on the arm that is coiled in stator (120) (121), to produce between stator tooth (122) and the magnet (135) by direction of rotation and repel or suction magnet (135), thereby make the axle sleeve (130) of attachment magnets (135) keep lasting rotation status.
Even cut off electric current, magnet (135) always plays the effect that the magnetic center that makes polar centers and stator tooth (122) is consistent, so stator tooth (122) will return to state as shown in Figure 9, thereby effectively eliminates the dead point.
Figure 14 is according to the present invention, coil rotation effect that demonstration takes place on the single phase winding (125) owing to the power supply of carrying from the outside flow to and inserted tooth rotation effect and the synthetic rotation effect that both synthesize.
Among the present invention, arc stator tooth (122) corresponding surface of magnet (135) relatively forms asymmetric, it promptly is the center with the axle, form the asymmetrical structure in space, and coil rotation effect and inserted tooth rotation effect are as showing shown in the synthetic rotation effect figure, can not synthesize under the state, thereby thoroughly eliminate the dead point at zero point.
In sum, the present invention has following advantage: form stator tooth (122) by cutting off The simple process of a side stator iron plate (120 '), can eliminate the dead point, thereby improve productivity And operating efficiency.
And in order to produce required inserted tooth power, only need to select to cut off stator iron plates (120 ') Size and the stator iron plate (120 ') that will cut off, thus easier inserted tooth power is adjusted.
Therefore, the present invention has following feature: form by the thickness with stator tooth (122) Asymmetrical simple Structure Improvement is easy to eliminate the dead point, thereby can improve motor (100) Performance, especially, along with the difference of the asymmetric rate of stator tooth (122), phase also takes place in inserted tooth power The variation of answering, therefore easier, more convenient to the adjustment of best inserted tooth power, thus advance one Step is improved the free degree of deisgn product.
Claims (10)
1. brushless single phase motor, it comprises: the fixture that projects upwards with the tube shape that is arranged on the base central part is shaped to the hectograph framework of one; Be arranged on described framework one side, and carry the printed circuit board (PCB) of power supply by the outside; The rotating shaft that is inserted in described fixture inside diameter and rotates by the bearing support; Be arranged on described rotating shaft upper end, and the downward hub that extends of top outer cylinder; Attached to described hub inner cylinder and concentric with it magnet; Be arranged on the outer cylinder of described fixture, and the end lamination with the arm of radial extension has the stator iron plate that has stator tooth, and get the stator tooth at different length and circumferential length center, be formed centrally the stator of space unsymmetric structure in axle being, to eliminate the dead point.
2. according to claims 1 described brushless single phase motor, it is characterized in that: the outer cylinder setting of described hub or some blades that produce wind-force are installed.
3. according to claims 1 described brushless single phase motor, it is characterized in that: described stator is formed by a slice or the stator iron plate lamination more than two.
4. brushless single phase motor, it comprises: the fixture that projects upwards with the tube shape that is arranged on the base central part is shaped to the hectograph framework of one; Be arranged on described framework one side, and carry the printed circuit board (PCB) of power supply by the outside; The rotating shaft that is inserted in described fixture inside diameter and rotates by the bearing support; Be arranged on described rotating shaft upper end, and the downward hub that extends of top outer cylinder; Attached to described hub inner cylinder and concentric with it magnet; Be arranged on the outer cylinder of described fixture, and the end lamination with the arm of radial extension has the stator iron plate that has stator tooth, and the identical and circumferential length center difference of described each stator tooth circumferential length is formed centrally the stator of space unsymmetric structure in axle being, to eliminate the dead point.
5. according to claims 4 described brushless single phase motors, it is characterized in that: the outer cylinder setting of described hub or some blades that produce wind-force are installed.
6. according to claims 4 described brushless single phase motors, it is characterized in that: described stator is formed by a slice or the stator iron plate lamination more than two.
7. brushless single phase motor, it comprises: the hectograph framework that the fixture that projects upwards with the tube shape that is arranged on the base central part is integrated; Be arranged on described framework one side, and carry the printed circuit board (PCB) of power supply by the outside; The rotating shaft that is inserted in described fixture inside diameter and rotates by the bearing support; Be arranged on described rotating shaft upper end, and the downward hub that extends of top frame; Attached to described hub inner cylinder and form concentrically ringed magnet; Be arranged on the outer cylinder of described fixture, and the end with the arm of radial extension will form stator tooth, and during by axially the cutting off as the Plane Angle of normal of this stator tooth, be the center with the section, will form the stator that stator tooth shape up and down has nothing in common with each other.
8. according to claims 7 described brushless single phase motors, it is characterized in that: the outer cylinder setting of described hub or some blades that produce wind-force are installed.
9. according to claims 7 described brushless single phase motors, it is characterized in that: described stator is formed by a slice or the stator iron plate lamination more than two.
10. according to claims 7 described brushless single phase motors, it is characterized in that: described stator global formation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR61277/1999 | 1999-12-23 | ||
| KR1019990061277A KR20010057863A (en) | 1999-12-23 | 1999-12-23 | A brushless motor of single phase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1301078A true CN1301078A (en) | 2001-06-27 |
Family
ID=19628923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00124745A Pending CN1301078A (en) | 1999-12-23 | 2000-09-14 | Brushless single phase motor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2001186743A (en) |
| KR (1) | KR20010057863A (en) |
| CN (1) | CN1301078A (en) |
| TW (1) | TW479396B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303401C (en) * | 2003-07-15 | 2007-03-07 | Pwb－鲁拉泰克工业产品有限公司 | Encoder system and method of assembly of such a system |
| CN1306678C (en) * | 2003-06-26 | 2007-03-21 | 建准电机工业股份有限公司 | Motor using local magnetic saturation effect of stator to improve starting dead point |
| CN102287384A (en) * | 2010-06-17 | 2011-12-21 | 财团法人工业技术研究院 | Mini-sized cooling fan |
| CN102629811A (en) * | 2012-03-05 | 2012-08-08 | 浙江亿利达风机股份有限公司 | Brushless direct current motor |
| US8608463B2 (en) | 2010-05-28 | 2013-12-17 | Industrial Technology Research Institute | Micro cooling fan |
| CN110707878A (en) * | 2018-07-10 | 2020-01-17 | 青岛云路先进材料技术股份有限公司 | Preparation method of motor magnetic core and motor magnetic core |
| CN113809887A (en) * | 2020-06-16 | 2021-12-17 | 上海凡宜科技电子有限公司 | Rotation-resisting type material level switch driving combination with Hall effect |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6822368B2 (en) * | 2002-06-04 | 2004-11-23 | Wavecrest Laboratories, Llc | Rotary permanent magnet electric motor having stator pole shoes of varying dimensions |
| JP2005045953A (en) * | 2003-07-24 | 2005-02-17 | Daikin Ind Ltd | Motor core and its manufacturing method |
| WO2005112226A1 (en) * | 2004-05-17 | 2005-11-24 | Fumito Komatsu | Four-pole synchronous motor |
| JP4715305B2 (en) * | 2005-05-24 | 2011-07-06 | ミツミ電機株式会社 | Single phase brushless motor |
| US8035325B2 (en) | 2006-08-21 | 2011-10-11 | Seiko Epson Corporation | Single-phase brushless motor |
| JP5120687B2 (en) * | 2007-06-25 | 2013-01-16 | 富士電機株式会社 | Stator structure of permanent magnet type rotating machine |
| CN101741157A (en) | 2008-11-21 | 2010-06-16 | 德昌电机(深圳)有限公司 | motor and rotor thereof |
| JP2011130605A (en) * | 2009-12-18 | 2011-06-30 | Minebea Co Ltd | Brushless motor |
| JP2013005533A (en) * | 2011-06-14 | 2013-01-07 | Semiconductor Components Industries Llc | Drive circuit of single-phase brushless motor |
| US9680339B2 (en) | 2013-01-04 | 2017-06-13 | Moog Inc. | Metal ribbon stator and motor comprising same |
| EP3700061B1 (en) | 2017-10-19 | 2023-10-04 | Mitsubishi Electric Corporation | Motor, fan, electric vacuum cleaner, and hand drying device |
-
1999
- 1999-12-23 KR KR1019990061277A patent/KR20010057863A/en not_active Application Discontinuation
-
2000
- 2000-09-13 JP JP2000278340A patent/JP2001186743A/en active Pending
- 2000-09-14 CN CN00124745A patent/CN1301078A/en active Pending
- 2000-09-16 TW TW089119017A patent/TW479396B/en not_active IP Right Cessation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306678C (en) * | 2003-06-26 | 2007-03-21 | 建准电机工业股份有限公司 | Motor using local magnetic saturation effect of stator to improve starting dead point |
| CN1303401C (en) * | 2003-07-15 | 2007-03-07 | Pwb－鲁拉泰克工业产品有限公司 | Encoder system and method of assembly of such a system |
| US8608463B2 (en) | 2010-05-28 | 2013-12-17 | Industrial Technology Research Institute | Micro cooling fan |
| US8684709B2 (en) | 2010-05-28 | 2014-04-01 | Industrial Technology Research Institute | Micro cooling fan |
| CN102287384A (en) * | 2010-06-17 | 2011-12-21 | 财团法人工业技术研究院 | Mini-sized cooling fan |
| CN102629811A (en) * | 2012-03-05 | 2012-08-08 | 浙江亿利达风机股份有限公司 | Brushless direct current motor |
| CN110707878A (en) * | 2018-07-10 | 2020-01-17 | 青岛云路先进材料技术股份有限公司 | Preparation method of motor magnetic core and motor magnetic core |
| CN113809887A (en) * | 2020-06-16 | 2021-12-17 | 上海凡宜科技电子有限公司 | Rotation-resisting type material level switch driving combination with Hall effect |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010057863A (en) | 2001-07-05 |
| TW479396B (en) | 2002-03-11 |
| JP2001186743A (en) | 2001-07-06 |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |