CN102412693B - Fan and motor thereof - Google Patents
Fan and motor thereof Download PDFInfo
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- CN102412693B CN102412693B CN201010297780.2A CN201010297780A CN102412693B CN 102412693 B CN102412693 B CN 102412693B CN 201010297780 A CN201010297780 A CN 201010297780A CN 102412693 B CN102412693 B CN 102412693B
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Abstract
The invention discloses a fan and a motor thereof. The motor comprises a pedestal, a stator, a rotor and a circuit board, wherein the stator is sleeved on the pedestal; the rotor is sleeved on the stator; the circuit board is arranged between the stator and the pedestal and is provided with a Hall element; the rotor is provided with an impeller, a rotating shaft and a magnet group; the rotating shaft extends towards the center of the stator; the magnet group consists of a plurality of magnets; the impeller is covered on the magnet group and the stator; a first clearance and a second clearance are formed between two adjacent magnets; the first clearance is close to the Hall element and is opposite to the second clearance; and the distance of the first clearance is less than that of the second clearance substantially, so that signals are assisted to be continuous and stable when the hall element is induced with the magnet group.
Description
Technical field
The present invention relates to a kind of motor, especially relate to a kind of fan and motor thereof that is applicable to brush-less fan and can assists Hall element induced magnetism.
Background technology
Flourish along with electronic product, industry also promotes for the requirement of the brush-less fan of heat transmission thereupon, no matter is in the performance of blast, air quantity or whole efficiency, is even all to become harsh on to the requirement of motor noise.Traditional brush-less fan, in order to reduce the noise of motor running, can carry out chamfered edge operation to the magnetite of rotor structure conventionally, thus to reduce the motor square that pauses, and reduces the noise that motor running produces.
The rotor structure of the motor that existing brush-less fan is used is announced " rotor structure of DC Brushless Motor " new patent No. M358465 as TaiWan, China, its as shown in Figure 1, the rotor structure 1 of this brushless motor comprises silicon steel sheet 10, axle center 11, a plurality of N utmost point magnet 12 and a plurality of S utmost point magnet 13.Wherein a plurality of N utmost point magnet 12 and a plurality of S utmost point magnet 13 outside that is located on silicon steel sheet 10 interlaced with each other, and have a predetermined space d between each adjacent N utmost point magnet 12 and S utmost point magnet 13.After existing brushless motor starts, the whole structure being fixedly mounted with is subject to after the vibration of revolution, can produce relative resonance, yet by the predetermined space d existing between N utmost point magnet 12 and S utmost point magnet 13, can reduce the motor square that pauses, make brushless motor running compared with tool efficiency and smooth-going, can reduce in the running its resonance situation, and then can reduce noise.
Yet, in the rotor structure 1 of existing brushless motor, owing to having predetermined space d between N utmost point magnet 12 and S utmost point magnet 13, make its with circuit board on Hall element (not shown) while carrying out magnetic induction, the easy obstruct because of this predetermined space d, and cause Hall element generation when induction N utmost point magnet 12 and S utmost point magnet 13 to be interrupted, and then easily produce erroneous judgement and the bad situation of generation induction, and affect the overall efficiency of motor.
In addition, still there are some existing motors can set up an auxiliary induction magnet ring, avoid the bad phenomenon of induction being caused because of magnetite chamfered edge as aforementioned, yet this kind of design can additionally increase cost, more may be because of the dimensional tolerances between axle center and auxiliary induction magnet ring or the corresponding situation such as not accurate, cause orientation problem, and, when setting up auxiliary induction magnet ring, also need the program that additionally once magnetizes again, therefore setting up auxiliary induction magnet ring not only increases production cost, more increases the complexity in manufacture craft.
Therefore, how to develop a kind of above-mentioned prior art disappearance of improving, can effectively reduce motor noise, simplify manufacture craft, motor configuration simultaneously that more can effectively assist Hall element induced magnetism, reduce production costs, real is current problem in the urgent need to address.
Summary of the invention
An object of the present invention is to provide a kind of motor, and to solve the motor of the existing brushless motor problem of square and noise of pausing, and it is bad to improve the induction of Hall element generation when carrying out Magnetic Induction.
Another object of the present invention is to provide a kind of motor that is applicable to fan, to solve the pause problem of square and noise of the motor of existing brushless motor, and improve because setting up auxiliary induction magnet ring and cause that production cost is higher, manufacture craft is comparatively complicated and need carry out the disappearances such as secondary magnetizes.
For reaching above-mentioned purpose, of the present invention one implements aspect for a kind of fan is provided compared with broad sense, and it comprises: pedestal; Stator, is sheathed on pedestal; Rotor, has impeller, rotating shaft and magnetite group, and rotating shaft is extended towards stator center, and magnetite group is comprised of a plurality of magnetite, and impeller is covered on magnetite group and stator; And circuit board, be arranged between stator and pedestal, and there is Hall element; Wherein, rotor is sheathed on stator, and between two adjacent magnetites, there is the first gap and the second gap, the first gap is adjacent to Hall element, and with respect to the second gap, and the distance in the first gap is less than in fact the second gap, signal continuously and stable when assisting Hall element and magnetite group Magnetic Induction.
According to conception of the present invention, wherein a plurality of magnetites of magnetite group are the square structure of tool radian, and the first gap location between each this adjacent magnetite has more a plurality of auxiliary magnetites, so that the space in the first gap distance is less than in fact the distance in the second gap.
According to conception of the present invention, wherein magnetite group magnetizes after program, each adjacent magnetite correspondence is magnetized as N utmost point magnetite and S utmost point magnetite, and be arranged at auxiliary magnetite between N utmost point magnetite and S utmost point magnetite correspondence magnetize as N/S utmost point magnetite and/or S/N utmost point magnetite.
According to conception of the present invention, wherein the distance in the first gap levels off to zero.
According to conception of the present invention, wherein a plurality of magnetites have first side and second side, and wherein first side is contiguous and be parallel to circuit board with respect to ，Qie first side, second side, and wherein the first gap is the distance between the first side of two adjacent magnetites.
According to conception of the present invention, wherein a plurality of magnetites are the trapezium structure of tool arc, and first side is greater than in fact second side, and the distance in the first gap between two adjacent magnetites is less than in fact the second gap.
According to conception of the present invention, wherein the first side of a plurality of magnetites has the first extension, and the distance in the first gap between two adjacent magnetites is less than in fact the second gap.
According to conception of the present invention, wherein the both sides, first side of a plurality of magnetites have respectively the first extension and the second extension, and the distance in the first gap between two adjacent magnetites is less than in fact the second gap, and the first gap levels off to zero.
For reaching above-mentioned purpose, of the present invention another implemented aspect for a kind of fan is provided compared with broad sense, and it comprises: pedestal; Stator, is sheathed on pedestal; Rotor, has impeller, rotating shaft and magnetite group, and rotating shaft is extended towards stator center, and magnetite group is comprised of a plurality of magnetite, and impeller is covered on magnetite group and stator; And circuit board, be arranged between stator and pedestal, and there is Hall element; Wherein, rotor is sheathed on stator, and between two adjacent magnetites, there is the first gap and the second gap, the first gap is adjacent to Hall element, and with respect to the second gap, and the distance in the first gap is less than in fact the second gap, signal continuously and stable when assisting Hall element and magnetite group Magnetic Induction.
Accompanying drawing explanation
Fig. 1 is the rotor structure schematic diagram of the motor configuration that uses of existing brush-less fan;
Fig. 2 A is the decomposition texture schematic diagram of the fan of the present invention's the first preferred embodiment;
Fig. 2 B is the package assembly schematic diagram of the fan shown in Fig. 2 A;
Fig. 3 A is the structural representation of magnetite group of the fan of the present invention's the first preferred embodiment;
Fig. 3 B is the upper TV structure schematic diagram of the magnetite group shown in Fig. 3 A;
Fig. 4 is the package assembly schematic diagram of rotor of the fan of the present invention's the first preferred embodiment;
Fig. 5 A is the structural representation of the magnetite group of another preferred embodiment of the present invention;
Fig. 5 B is the structural representation of the magnetite group of the another preferred embodiment of the present invention;
Fig. 5 C is the structural representation of the magnetite group of another preferred embodiment of the present invention;
Fig. 5 D is the structural representation of the magnetite group of another preferred embodiment of the present invention.
Main element symbol description
Rotor structure: 1 silicon steel sheet: 10,241
Axle center: 11 N utmost point magnet: 12
S utmost point magnet: 13 predetermined spaces: d
Fan: 2 rotors: 20
Impeller: 21 storage tanks: 211a
Groove: 211b axis hole: 212
Flabellum: 213 rotating shafts: 23
Magnetite group: 22,32,42,52,62
Magnetite: 220,221,320,321,420,421,520,521,620,621
First side: 220a, 221a, 320a, 321a, 420a, 421a, 520a, 521a, 620a, 621a
Second side: 220b, 221b, 320b, 321b, 420b, 421b, 520b, 521b, 620b, 621b
Auxiliary magnetite: 222 the 3rd side: 320c, 321c
Stator: 24 circuit boards: 25
Clamping part: 242 button holes: 252
Hall element: 251 pedestals: 26
Coiling: 27
The first extension: 420c, 421c, 620c, 621c
The second extension: 620d, 621d
The--gap: d1, d5, d6, d7, d8
The second gap: d2 space distance: d3, d4
Embodiment
Some exemplary embodiments of feature & benefits of the present invention will describe in detail in the explanation of back segment.Be understood that the present invention can have various variations in different aspects, its neither departing from the scope of the present invention, and explanation wherein and be shown in the use that ought explain in essence, but not in order to limit the present invention.
Refer to Fig. 2 A, the decomposition texture schematic diagram of its fan that is the present invention's the first preferred embodiment.As shown in the figure, fan 2 is mainly comprised of rotor 20, stator 24, circuit board 25 and pedestal 26, and its rotor 20 comprises impeller 21, magnetite group 22 and rotating shaft 23.Rotating shaft 23 is extended towards stator 24 center, and magnetite group 22 is by 220,221 inner peripherals that form and be arranged at impeller 21 of a plurality of magnetic.The center of impeller 21 has an axis hole 212, in order to be socketed with rotating shaft 23, and has established a plurality of flabellums 213 at the periphery ring of impeller 21.Stator 24 has a plurality of silicon steel sheets 241 and is located on rotating shaft 23.Circuit board 25 is arranged between stator 24 and pedestal 26, and Hall element 251 is arranged on circuit board 25.Continue and consult Fig. 2 A and Fig. 2 B, when fan 2 is assembled, magnetite group 22 correspondences are arranged to the inner peripheral of impeller 21, then rotating shaft 23 is arranged in axis hole 212.And the clamping part of stator 24 242 correspondences are buckled to the button hole 252 of being located at circuit board 25, stator 24 is able to and circuit board 25 combinations, so that stator 24 is linked and is arranged at circuit board 25 and is arranged on pedestal 26.And circuit board 25 and pedestal 26 can be different parts or the parts that are formed in one each other, not as limit.Rotor 20 is sheathed on stator 24, and a plurality of magnetites 220,221 correspondences of magnetite group 22 are located on the outside of stator 24, finally covers upper impeller 21, to form fan as shown in Figure 2 B again.When fan 2 completes assembling, complete being covered on stator 24, circuit board 25 of impeller 21 of rotor 20, and connect with the mutual group of pedestal 26.
Referring again to Fig. 2 A, as shown in the figure, rotating shaft 23 is articulated in the impeller 21 of rotor 20, and wears stator 24.22 inner sides that are arranged at impeller 21 of magnetite group, the mode of its setting can arrange a plurality of corresponding storage tank 211a, groove 211b (as shown in Figure 4) by impeller 21, and then arrange with corresponding magnetite group 22 engagings, but its mode that links setting is not as limit.In the present embodiment, stator 24 is arranged in the accommodation space of rotor 20 inside, and winding coiling 27 on a plurality of silicon steel sheets 241 of stator 24.And, Hall element 251 on circuit board 25 arranges with respect to magnetite group 22, after fan 2 starts, the magnetic pole that Hall element 251 can corresponding induction magnetite group 22, the poor control circuit (not shown) of giving on circuit board 25 of output voltage, and then control the magnetic pole that switches silicon steel sheet 241, with the magnetic pole generation electromagnetic coupled of the magnetite group 22 with rotor 20, and the rotor 20 of drive fan 2 rotates.
Refer to Fig. 3 A, the structural representation of the magnetite group of its fan that is the present invention's the first preferred embodiment.As shown in the figure, magnetite group 22 is comprised of 220,221 of a plurality of magnetites, take the present embodiment as example, magnetite 220,221 is the square structure of tool radian, but not as limit, and magnetite 220,221 has first side 220a, 221a and second side 220b, 221b, wherein first side 220a, 221a be with respect to second side 220b, 221b, and first side 220a, 221a are contiguous and be parallel to circuit board 25.Between first side 220a, the 221a of two adjacent magnetites 220,221, there is the first gap d 1, and between second side 220b, 221b, there is the second gap d 2, in the present embodiment, in each first gap d 1, correspondence arranges auxiliary magnetite 222, the material of auxiliary magnetite 222 is not limited to identical with magnetite 220,221, and it can apply situation and appoint and execute variation according to actual.As shown in Figure 3A, the length of auxiliary magnetite 222 is less than in fact the distance of this first gap d 1, yet, when auxiliary magnetite 222 is arranged in the first gap d 1, the space of first side 220a, the 221a of two adjacent magnetites 220,221 distance is the distance d4 that the distance d3 between magnetite 220 and auxiliary magnetite 222 adds between auxiliary magnetite 222 and magnetite 221, and the space in the first gap d 1 is less than in fact the distance of the second gap d 2 apart from d3 and d4.Thus, when magnetite group 20 is during corresponding to Hall element 251 on circuit board 25, owing to assisting magnetite 222, filled up the space of part the first gap d 1, while making Hall element 251 induction magnetite group 20, can sense continuity and stable signal, and then make the running of motor configuration 2 more steady, smooth and easy.
Refer to Fig. 3 B, it is TV structure schematic diagram on the magnetite group shown in Fig. 3 A, as shown in the figure, when magnetite group 22 magnetizes program, be that magnetite 220 is magnetized as N utmost point magnetite, and adjacent magnetite 221 is magnetized as S utmost point magnetite, now, 222 of auxiliary magnetites that are arranged between magnetite 220,221 are magnetized as N/S utmost point magnetite, and by that analogy, 222 of auxiliary magnetites that are arranged between S utmost point magnetite and N utmost point magnetite can be magnetized as S/N utmost point magnetite.Thus, the N utmost point of magnetite group 22, the S utmost point have a common boundary and are positioned on auxiliary magnetite 222, so can make the magnetic line of force of magnetite group 22 more smooth-going, complete, not only can reduce a square of fan 2, also can make the Magnetic Induction between itself and Hall element 251 more stable simultaneously, in addition, because auxiliary magnetite 222 is arranged between magnetite 220,221, therefore only need the program of magnetizing once can complete magnetizing of magnetite group 22, further simplify the manufacture craft of fan 2.
Refer to Fig. 4, the package assembly schematic diagram of the rotor of its fan that is the present invention's the first preferred embodiment, as shown in the figure, when the magnetite group 22 of rotor 20 is during with the corresponding assembling of impeller 21, that a plurality of magnetite 220,221 correspondences are arranged in the storage tank 211a of impeller 21 inner sides, and auxiliary magnetite 222 is arranged in the groove 211b between two adjacent storage tank 211a, and rotating shaft 23 is arranged to axis hole 212 places at impeller 21 centers, thus to complete the package assembly of rotor 20.
Refer to Fig. 5 A, the structural representation of its magnetite group that is another preferred embodiment of the present invention, as shown in the figure, magnetite group 32 has a plurality of magnetites 320, 321 rings are established and are formed, and in the present embodiment, magnetite 320, 321 is the trapezium structure of tool radian, and magnetite 320, 321 first side 320a, the length of 321a is greater than in fact respectively second side 320b, the length of 321b, and magnetite 320, 321 the 3rd side 320c, 321c is in fact perpendicular to first side 320a, 321a and second side 320b, 321b, meaning i.e. two adjacent magnetites 320, the first gap d 5 between 321 is less than in fact the second gap d 2, when magnetite group 32 is during with the corresponding induction of Hall element 251 on circuit board 25, because the first gap d 5 is less, can sense more continuous, stable signal.
Refer to Fig. 5 B, it is respectively the structural representation of the magnetite group of the another preferred embodiment of the present invention, the magnetite group 42 shown in Fig. 5 B of take is example, it has a plurality of adjacent equally, and around the magnetite 420 arranging, 421, in the present embodiment, at magnetite 420, 421 first side 420a, 421a place has respectively the first extension 420c, 421c, thus, first side 420a, the length of 421a is greater than in fact second side 420b, the length of 421b, the distance of the first gap d 6 between the first extension 420c of magnetite 420 and the first side 421a of magnetite 421 is less than in fact the second gap d 2.
In another embodiment, as shown in Figure 5 C, magnetite group 52 is also comprised of 520,521 of a plurality of magnetites, and magnetite 520,521 and previous embodiment are similar, for having the trapezium structure of radian, the length of first side 520a, the 521a of magnetite 520,521 is greater than in fact second side 520b, 521b, in the present embodiment, first side 520a, the 521a of magnetite 520,521 extend towards both sides, therefore make the first gap d 7 distances between magnetite 520,521 minimum, almost level off to zero.In the present embodiment, because the first gap d 7 almost levels off to zero, therefore, when magnetite group 52 is during with the corresponding induction of Hall element 251 on circuit board 25, can present more continuous and stable signal.
Referring again to Fig. 5 D, the structural representation of its magnetite group that is another preferred embodiment of the present invention, as shown in the figure, the magnetite 620 that magnetite group 62 is established by a plurality of rings, 621 institutes form, and magnetite 620, 621 have first side 620a equally, 621a, and with first side 620a, the second side 620b that 621a is corresponding, 621b, in the present embodiment, magnetite 620, 621 first side 620a, the both sides of 621a have respectively the first extension 620c, 621c and the second extension 620d, 621d, and the second extension 621d of the first extension 620c of each magnetite 620 and adjacent magnetite 621 is adjoining, the distance that meaning is arranged at the first gap d 8 between magnetite 620 and magnetite 621 almost levels off to zero.
From aforementioned multiple enforcement aspect, by each magnetite group 22, 32, 42, 52, a plurality of magnetites 220 and 221 in 62, 320 and 321, 420 and 421, 520 and 521, the first shorter gap d 1 of space distance between 620 and 621, d5, d6, d7, d8, so that magnetite group 22, 32, 42, 52, 62 when Hall element 251 induction with circuit board 25, can obtain comparatively continuous, stable signal, and then the usefulness of promoting fan 2, in addition, due to magnetite group 22, 32, 42, 52, the second gap d 2 of 62 is still the distance that remains certain, therefore can make its magnetic line of force can trend towards sine wave, and then can effectively reduce by 2 squares of fan, the noise producing while reducing fan 2 running.
In sum, the fan that the present invention is applicable to brush-less fan has pedestal, stator, rotor and circuit board, its rotor has impeller, rotating shaft and magnetite group, magnetite group is comprised of a plurality of magnetite, and the first gap and second gap between two adjacent magnetites with mutual correspondence, this first gap is close in the Hall element on circuit board, and this first gap is less than in fact the second gap, by the auxiliary magnetite group in the first less gap, when carrying out Magnetic Induction with Hall element, can obtain more continuous and stable signal, and then the usefulness of promoting fan, and magnetite group only needs can complete through once magnetizing the program of magnetizing, have and can simplify manufacture craft, save cost, and can reduce fan noise simultaneously and promote the advantages such as fan usefulness.
The present invention must be appointed and be executed that craftsman thinks and be to modify as all by person familiar with the technology, yet neither disengaging is as appended Protector that claim is wanted.
Claims (9)
1. a motor, is applicable to a brush-less fan, and it comprises:
Pedestal;
Stator, is sheathed on this pedestal;
Rotor, is sheathed on this stator, and has rotating shaft and magnetite group, and this rotating shaft is extended towards this stator center, and this magnetite group is comprised of a plurality of magnetite; And
Circuit board, is arranged between this stator and this pedestal, and has Hall element;
Wherein, between two adjacent magnetites of the plurality of magnetite, there is the first gap and the second gap, this first gap is adjacent to this Hall element, and with respect to this second gap, and, the distance in this first gap is less than in fact this second gap, signal continuously and stable when assisting this Hall element and this magnetite group Magnetic Induction, the plurality of magnetite of this magnetite group is the square structure of tool radian, and this first gap location between each this adjacent magnetite also has a plurality of auxiliary magnetites, so that the space in this first gap distance is less than in fact the distance in this second gap.
2. motor as claimed in claim 1, wherein the length of this auxiliary magnetite is less than in fact the distance in this first gap.
3. motor as claimed in claim 1, wherein adjacent two magnetites are respectively N utmost point magnetite and S utmost point magnetite, and this auxiliary magnetite being arranged between this N utmost point magnetite and this S utmost point magnetite is N/S utmost point magnetite.
4. motor as claimed in claim 1, wherein the distance in this first gap levels off to zero.
5. a motor, is applicable to a brush-less fan, and it comprises:
Pedestal;
Stator, is sheathed on this pedestal;
Rotor, is sheathed on this stator, and has rotating shaft and magnetite group, and this rotating shaft is extended towards this stator center, and this magnetite group is comprised of a plurality of magnetite; And
Circuit board, is arranged between this stator and this pedestal, and has Hall element;
Wherein, between two adjacent magnetites of the plurality of magnetite, there is the first gap and the second gap, this first gap is adjacent to this Hall element, and with respect to this second gap, and, the distance in this first gap is less than in fact this second gap, signal continuously and stable when assisting this Hall element and this magnetite group Magnetic Induction, the plurality of magnetite has first side and second side, wherein this first side is with respect to this second side, and this first side is contiguous and be parallel to this circuit board, distance between this first side that wherein this first gap is this two adjacent magnetite.
6. motor as claimed in claim 5, wherein the plurality of magnetite is the trapezium structure of tool radian, and this first side is greater than in fact this second side, the distance in this first gap between this two adjacent magnetite is less than in fact this second gap.
7. motor as claimed in claim 5, wherein this first side of this magnetite has the first extension, and the distance in this first gap between this two adjacent magnetite is less than in fact this second gap.
8. motor as claimed in claim 7, wherein these both sides, first side of this magnetite have respectively this first extension and one second extension, the distance in this first gap between this two adjacent magnetite is less than in fact this second gap, and this first gap levels off to zero.
9. a fan with at least one described motor in claim 1-8, it comprises:
Pedestal;
Stator, is sheathed on this pedestal;
Rotor, is sheathed on this stator, and has impeller, rotating shaft and magnetite group, and this rotating shaft is extended towards this stator center, and this magnetite group is comprised of a plurality of magnetite, and this impeller is covered on this magnetite group and this stator; And
Circuit board, is arranged between this stator and this pedestal, and has Hall element;
Wherein, between two adjacent magnetites of the plurality of magnetite, there is the first gap and the second gap, this first gap is adjacent to this Hall element, and with respect to this second gap, and, the distance in this first gap is less than in fact this second gap, and signal continuously and stable when assisting this Hall element and this magnetite group Magnetic Induction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010297780.2A CN102412693B (en) | 2010-09-21 | 2010-09-21 | Fan and motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010297780.2A CN102412693B (en) | 2010-09-21 | 2010-09-21 | Fan and motor thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102412693A CN102412693A (en) | 2012-04-11 |
| CN102412693B true CN102412693B (en) | 2014-02-26 |
Family
ID=45914604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010297780.2A Expired - Fee Related CN102412693B (en) | 2010-09-21 | 2010-09-21 | Fan and motor thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN102412693B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020243882A1 (en) * | 2019-06-03 | 2020-12-10 | 威刚科技股份有限公司 | Axial rotor of axial-gap-type rotary electric motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2386570Y (en) * | 1999-09-02 | 2000-07-05 | 深圳市宝利达实业有限公司 | Brushless DC. electric motor |
| CN2891454Y (en) * | 2005-07-14 | 2007-04-18 | 王华正 | Rotor structure of brushless motor with external rotor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080084139A1 (en) * | 2006-10-04 | 2008-04-10 | Emerson Electric Co. | Motor having rotor position sensor |
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2010
- 2010-09-21 CN CN201010297780.2A patent/CN102412693B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2386570Y (en) * | 1999-09-02 | 2000-07-05 | 深圳市宝利达实业有限公司 | Brushless DC. electric motor |
| CN2891454Y (en) * | 2005-07-14 | 2007-04-18 | 王华正 | Rotor structure of brushless motor with external rotor |
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| Publication number | Publication date |
|---|---|
| CN102412693A (en) | 2012-04-11 |
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