CN1254978A - High-torque high-supporter efficient motor with external rotor - Google Patents
High-torque high-supporter efficient motor with external rotor Download PDFInfo
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- CN1254978A CN1254978A CN 98124958 CN98124958A CN1254978A CN 1254978 A CN1254978 A CN 1254978A CN 98124958 CN98124958 CN 98124958 CN 98124958 A CN98124958 A CN 98124958A CN 1254978 A CN1254978 A CN 1254978A
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Abstract
A high-torque firm-supporter efficient motor with external rotor is composed of motor base, internal stator, shaft, bearing and external rotor. Said motor base is composed of the first and the second bases. The internal stator including armature and exciting windings are fixed in motor base in such manner that its one end is fixed to one end of motor base and shaft passes through two ends of motor base and the central hole of armature. External rotor including its base and its magnets are arranged in motor base. The slots of armature can be more deep to increase the total cross section of exciting winding, so greatly increasing the output torque. It also has firm overall structure.
Description
The present invention relates to the outer-rotor type motor in a kind of electricity field motor, particularly relate to a kind of high efficiency, high torsion, the high external-rotor motor that supports.
Brushless motor can be divided into three types of inner-rotor type, outer-rotor type and platypelloid types etc. as if the structural classification with rotor.Wherein, inner-rotor type motor is to make the external stator portion that is provided with magnetizing coil cylindric and be fixed in the inwall of motor chassis, and the internal rotor that is provided with magnet then changes is located at stator interior; And the outer-rotor type motor, then opposite with inner-rotor type motor, it is to make an external rotor portion that is provided with magnet cylindric and change and be located in the motor chassis, makes the inner stator that is provided with magnetizing coil cylindric in addition and is arranged in external rotor inside, and be fixed in motor base.As for motor shaft then an end and external rotor fix, remainder then runs through centre bore cylindraceous.
In theory, compare as inner-rotor type motor and outer-rotor type motor with identical basal area, the maximum outputting torsion of outer-rotor type motor should be big more than inner-rotor type motor.Therefore in theory, need motor little and torsion is big, then the outer-rotor type motor should have more implementation than inner-rotor type motor.Because the external rotor diameter of outer-rotor type motor is bigger than the internal rotor diameter of inner-rotor type motor, the cross-sectional area of outer rotor magnet is much larger than the cross-sectional area of inner rotor magnets.Thereby the outputting torsion of the outer-rotor type motor of identical in theory area of section, should be bigger than the outputting torsion of the inner-rotor type motor of identical area of section.In addition, the magnet diameter of external rotor is bigger, can magnetic by many magnetic poles when magnetizing, and when utilizing Hall element that the magnet of external rotor is made Position Control, can improve resolution.
From the above, in theory, in the time need producing the motor of high torsion output with small size, or but can control with high-res with small size the time, external-rotor motor is best selection.
But existing external-rotor motor as shown in Figure 7 is because its rotating shaft 50 need run through internal stator 51, and rotated by the support of internal stator 51, so the central authorities at internal stator 51 must wear a sleeve 52, and at bearing 54 of endoporus 53 installing of sleeve 52, so that run through support for rotating shaft 50.Thus, promptly generation has following significant deficiency:
1, because sleeve 52 must be through the central authorities of internal stator 51, and sleeve 52 also must can be installed bearing 54, so require the aperture of the endoporus 53 of internal stator 51 must be enough greatly, thereby caused the area of wire casing of the yoke of internal stator 51 to reduce greatly, must be very little so that pass through total area of section of the wire turn of wire casing, so the magnetic force of internal stator 51 still can't improve effectively.This point is the greatest problem that the external-rotor motor of the high torsion of small size of people's needs exists always, still can't solve so far.
2, because the internal stator 51 of external-rotor motor only depends on one end and 55 fixed linking to each other of motor base, and an other end of this internal stator 51 is hanging shapes, and external rotor 56 is again to be installed in the rotating shaft 50 and under the unsettled end support of internal stator 51 and rotate, its external rotor 56 has in the process of running with rotating shaft 50 and produces the serious problems of rocking effect.Therefore external-rotor motor is not applicable to the load that drives deflection, so still can't be applied to industrially so far, and can only be applied to not be partial to the occasion of load, for example the video disc CD-ROM drive motor of the video disc CD-ROM drive motor of soft disc player, Hard Disk Drive etc.This is again other serious problems of external-rotor motor.
Because above-mentioned existing external-rotor motor has theoretic advantage, but because can't overcome the major defect of its existence on the structural design always, and cause external-rotor motor can't give full play to theoretic advantage, and be widely used in industrial, particularly can't satisfy the demand of the high torsion motor of small size, the defective that the inventor exists at external-rotor motor, based on abundant practical experience and professional knowledge, actively studied innovation, through constantly research, design, and after studying sample and improvement repeatedly, create the present invention finally.
Main purpose of the present invention is, a kind of high efficiency of new structure, high torsion, the high external-rotor motor that supports are provided, can thoroughly solve the major defect on the structural design that external-rotor motor exists, under the condition of the high outputting torsion of small size, the area of the wire casing of internal stator yoke can effectively be strengthened, make the total basal area of the wire turn by wire casing also can significantly improve, and the current density of internal stator is effectively improved, and then the outputting torsion of whole external-rotor motor is improved greatly, also can lower the working temperature of motor simultaneously.
Of the present invention time a purpose is, a kind of high efficiency, high torsion, the high external-rotor motor that supports are provided, make it under the condition of the high outputting torsion of small size, the basal area of the internal diameter of internal stator yoke (silicon steel sheet) can effectively be dwindled, the electromagnetism flux density that is produced after energising also can distribute swimmingly, and then the efficient of whole external-rotor motor is improved greatly.
Another object of the present invention is to, a kind of high efficiency, high torsion, the high external-rotor motor that supports are provided, make its internal stator yoke (silicon steel sheet) be fixed on motor base by enough screws, and its fastness is improved greatly; Other has breakthrough structural design, makes the two ends of the external rotor of motor can obtain stable support, and as inner rotor motor structure, external rotor also is subjected to the protection of motor base cover cap, makes the motor overall structure firm, and the rotating shaft running steadily.
The objective of the invention is to realize by following technical scheme.The external-rotor motor that a kind of high efficiency, high torsion, the height that proposes according to the present invention supports, it mainly includes main members such as motor base, internal stator, rotating shaft, bearing and external rotor, it is characterized in that wherein: this motor base is connected and is constituted by first pedestal and second pedestal; This internal stator is fixedly arranged on the inside of motor base, and it comprises yoke and magnetizing coil; Wherein this yoke is provided with axial through hole and radial ground cloth and is deployed on through hole wire casing on every side; This magnetizing coil is set around the wire casing of yoke; A wherein end of this internal stator is fixed on a wherein end of motor base; This rotating shaft, through the through hole at yoke center, the two ends of rotating shaft or wherein an end for running through the two ends of motor base or an end wherein respectively; This bearing is installed in the two ends of motor base; This external rotor is arranged in the motor base, and it comprises external rotor pedestal and outer rotor magnet; Wherein, this external rotor pedestal is fixedly arranged in the rotating shaft, and ladle cover is in the outer rim of internal stator; This outer rotor magnet is arranged at the inner edge of external rotor pedestal.
Purpose of the present invention can also further realize by following technical measures.
Aforesaid external-rotor motor, wherein said yoke are provided with at the periphery of through hole and run through the axial fixing hole of this yoke, and are provided with screw and run through this fixing hole and fix.
Aforesaid external-rotor motor, first pedestal of wherein said motor base and second pedestal, this first pedestal wherein, and be provided with location hole, to be the concentric circles location with internal stator; This second pedestal is connected for being concentric circles with first pedestal, sets up in the inside of this first pedestal and second pedestal and forms inner cavity chamber; Above-mentioned bearing is provided with two bearings at least, and is installed in first pedestal and second pedestal respectively.
Aforesaid external-rotor motor, among two pedestals such as wherein said first pedestal and second pedestal, one of them foundation design forms tubular, and cover cap is in the outer rim of internal stator and external rotor.
Aforesaid external-rotor motor, wherein said bearing are provided with two bearings, and are installed in respectively among first pedestal and second pedestal.
Aforesaid external-rotor motor, wherein said first foundation design forms tubular, and second pedestal then designs and forms the end cap shape, and cover is filled in the openend of first pedestal of tubular.
Aforesaid external-rotor motor, wherein said internal stator yoke is provided with the location division, its structure structure that can be the protuberance made with punching structure on each sheet internal stator yoke engage mutually with recess, also can be to be provided with the location hole that runs through, and be provided with that alignment pin runs through this location hole and the structure of locating in internal stator yoke upper punch.
Aforesaid external-rotor motor, wherein said motor base further comprises a bearing pedestal, this bearing pedestal is provided with the other end that the screw interlocking passes internal stator, and further is locked on first pedestal, is provided with an other bearing in this bearing pedestal and is installed in wherein.
The present invention compared with prior art has tangible advantage and good effect.By above technical scheme as can be known, the present invention is directed to external-rotor motor and have theoretic advantage, but cause external-rotor motor still can't give full play to its theoretic advantage because of the major defect that can't overcome on the structural design always, and can't be widely used in industrial, particularly can't satisfy the demand of the high torsion motor of small size, thereby the external-rotor motor that provides a kind of high efficiency, high torsion, height to support, it can thoroughly solve the defective on the existing structural design of external-rotor motor, and has following design feature and effect:
1, the present invention is under the condition of the high outputting torsion of small size, the area of the wire casing of internal stator yoke can effectively strengthen, the total basal area of the wire turn by wire casing also can significantly be improved, the current density of internal stator is effectively improved, and then the outputting torsion of whole external-rotor motor is improved greatly, also can reduce the working temperature of motor simultaneously.
2, the present invention is under the condition of the high outputting torsion of small size, and the basal area of internal stator yoke (silicon steel sheet) can effectively strengthen, and the electromagnetism flux density that is produced after energising also can increase substantially, and then the efficient of whole external-rotor motor can be improved greatly.
3, internal stator yoke of the present invention (silicon steel sheet) can be fixed on motor base by enough screws, so its fastness can improve greatly.
4, because of the breakthrough of the present invention on structural design; make the two ends of the external rotor of motor can obtain stable support, firm as the inner rotor motor, and external rotor is also because of being provided with the protection of motor base cover cap; and making the motor overall structure firm, the rotating shaft running is steadily.
In sum, the present invention removes former bearing and the sleeve that is installed in the internal stator centre bore, and be installed in the internal stator outside, making internal stator only need be drilled with the perforation of enough passing for rotating shaft gets final product, so the degree of depth that can deepen the wire casing of internal stator yoke, total cross section of twining magnetizing coil is strengthened, significantly improved the outputting torsion of external-rotor motor; In addition this bearing is changed and be located in the motor base cover cap, make firm as the supporting construction of rotor motor of the supporting construction at external rotor two ends, and external rotor is subjected to the protection of motor base cover cap simultaneously, thereby make the motor overall structure firm.No matter it structurally or bigger improvement is all arranged on the function, and have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thereby be suitable for practicality more, really is a new and innovative, progressive, practical new design.
Concrete structure of the present invention is provided in detail by following examples and accompanying drawing thereof.
Fig. 1 is the exploded perspective view of first embodiment of the invention.
Fig. 2 is the combining structure stereogram of first embodiment of the invention.
Fig. 3 is the profile of A-A hatching line among Fig. 2.
Fig. 4 is the profile of B-B hatching line among Fig. 2.
Fig. 5 is the structure enlarged drawing of Fig. 3.
Fig. 6 is the section of structure of second embodiment of the invention.
Fig. 7 is the structural profile schematic diagram of existing external-rotor motor.
Below in conjunction with accompanying drawing and preferred embodiment, to high efficiency, high torsion, high its concrete structure of external-rotor motor, feature and the effect thereof that supports that foundation the present invention proposes, describe in detail as after.
See also Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, high efficiency of the present invention, high torsion, the high external-rotor motor that supports, it mainly comprises main members such as motor base 11, internal stator 12, rotating shaft 13, bearing 14 and external rotor 15, wherein:
This motor base 11 is connected and is constituted by first pedestal 17 and second pedestal 18, and first pedestal 17 is connected for being concentric circles with second pedestal 18, and its inner foundation forms inner cavity chamber 16.Wherein, among two pedestals such as first pedestal 17 and second pedestal 18, one of them foundation design forms tubular, cover cap is in the outer rim of internal stator and external rotor, in the present embodiment shown in the figure, 17 designs of first pedestal form tubular, and second pedestal 18 then designs and forms the end cap shape, and cover is filled in the openend of first pedestal 17 of tubular.First pedestal 17 also is provided with location hole 27, locatees to provide with internal stator 12 concentric circless.
This internal stator 12, it is fixedly arranged on the inside of motor base 11, and it comprises yoke 19 and magnetizing coil 20.Wherein, this yoke 19 is provided with axial through hole 21 and radial ground cloth and is deployed on through hole 21 wire casing 22 on every side; This magnetizing coil 20 is set around the wire casing 22 of yoke 19.A wherein end of internal stator 12 is fixed on a wherein end of motor base 11.Yoke 19 is provided with at the periphery of through hole 21 and runs through the axial fixing hole 25 of this yoke 19, and is provided with screw 26 and runs through this fixing hole 25 and fix.
This rotating shaft 13 is the through holes 21 through yoke 19 centers, the two ends of rotating shaft 13 or wherein an end be to run through the two ends of motor base 11 or an end wherein respectively.
These bearings 14 are the two ends that are installed in motor base 11.
This external rotor 15 is arranged in the motor base 11, and it comprises external rotor pedestal 23 and outer rotor magnet 24.Wherein, this external rotor pedestal 23 is fixedly arranged in the rotating shaft 13, and ladle cover is in the outer rim of internal stator 12; This outer rotor magnet 24 is arranged at the inner edge of external rotor pedestal 23.
Internal stator 12 of the present invention is because structural breakthrough design, make the area of the wire casing 22 of internal stator yoke 19 can deepen effectively and strengthen, can increase effectively so that be set around total area of section of magnetizing coil 20 of the wire casing 22 of yoke 19, simultaneously the basal area of yoke 19 can effectively be strengthened, and then the total basal area of the wire turn of the magnetizing coil by wire casing 22 also can significantly be improved, the magnetic force of internal stator 12 is effectively improved, and then the outputting torsion of whole external-rotor motor is improved greatly, even also the electromagnetism flux density that is produced after the energising can significantly improve, and then the efficient of whole external-rotor motor is improved greatly, and can reduce the working temperature of motor.Simultaneously because internal stator yoke 19 of the present invention (silicon steel sheet) can be fixed on motor base 11 by enough screws 26, so its fastness improves greatly.Internal stator yoke 19 (silicon steel sheet) is provided with location division 29 in addition, can splice at the internal stator yoke 19 with each sheet and radial misalignments can not take place together.Aforesaid location division 29, its structure structure that can be the protuberance made in the punching structure mode on each sheet internal stator yoke 19 engage mutually with recess, also can on internal stator yoke 19, go out the location hole that runs through, and be provided with that alignment pin runs through this location hole and the structure of locating.
See also Fig. 1 to shown in Figure 5, be first embodiment of the invention, two bearing the 14, the 14th is installed in respectively in first pedestal 17 and second pedestal 18.
See also shown in Figure 6, be second embodiment of the invention, it further comprises a bearing pedestal 28, this bearing pedestal 28 is provided with the other end that screw 26 passes internal stator 12, and further be locked on first pedestal 17 (shown in Figure 5) in conjunction with consulting, be provided with a bearing 14 in this bearing pedestal 28, and can be installed in wherein for this other bearing 14.
For the size that further specifies the through hole of excavating at internal stator yoke 19 centers 21 is very big for the influence of motor torque magnitude, the present invention is especially with the example (1: 1) that makes a comparison, and makes comparisons through the distribution map of the Element Analysis magnetic line of force.(seeing also shown in the annex 1, is the not logical distribution map of the electromagnetism during borehole of yoke center shown in the figure, and orange areas is depicted as the stator (1: 1) of diameter 35mm).If the diameter of rotating shaft of the present invention is 8mm, then the stator aperture is 9mm (see also shown in annex 2, yellow is the aperture of 9mm).Because the aperture of diameter 9mm is little, and is very little to the distribution influence of magnetic flux, and, therefore can freely match suitable bearing according to the torque magnitude of motor because bearing is not installed in inner stator.For example select the bearing (seeing also shown in the bearing specification table shown in annex 4) that is numbered 608ZZ for use, its inner diameter d=8mm, outer diameter D=22mm, dynamic load Cr=335Kgf.
When if existing structure also will be selected the bearing that is numbered 608ZZ for use, shown in annex 3, because the outer diameter D=22mm of 608ZZ bearing, again because the diameter of wire casing root edge has only 18mm, the 608ZZ bearing of outer diameter D=22mm can't be can hold at all, therefore the bearing of diameter must be selected for use less than 18mm.If selecting external diameter for use is the bearing of the numbering 688ZZ of 16mm, its inner diameter d=8mm, outer diameter D=16mm, dynamic load Cr=128Kgf.Hence one can see that, owing to select reducing of bearing outside diameter for use, its dynamic load Cr value that can load is also along with reduction, and therefore in high torsion work, will reduce its useful life.In addition, when using the 688ZZ bearing of outer diameter D=16mm, just must be drilled with the aperture that diameter is 16mm (shown in blue look zone) in the central authorities of yoke, so big endoporus must cause the area of magnetic flux distribution significantly to lower, and causes magnetic flux distribution to have some setbacks and reduces the outputting torsion of motor greatly.If lower significantly and thick when the external upset (EU) peritreme meat for fear of the area of magnetic flux distribution, the degree of depth of wire casing is shoaled greatly and cause the wire turn basal area to reduce, cause outputting torsion to diminish, the power output of motor is also along with reduction certainly, and just the efficient of motor reduces.This point is the existing and insurmountable always problem of existing external-rotor motor.And the external-rotor motor of high efficiency of the present invention, high torsion, high support has solved the existing defective of existing external-rotor motor up hill and dale, thereby confirms the effect that is suitable for practicality that has really of the present invention.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (8)
1, a kind of high efficiency, high torsion, the high external-rotor motor that supports mainly comprise motor base, internal stator, rotating shaft, bearing and external rotor member, it is characterized in that wherein:
This motor base is connected and is constituted by first pedestal and second pedestal;
This internal stator is fixedly arranged on the inside of motor base, and it comprises yoke and magnetizing coil; Wherein this yoke is provided with axial through hole and radial ground cloth and is deployed on through hole wire casing on every side; This magnetizing coil is set around the wire casing of yoke; A wherein end of this internal stator is fixed on a wherein end of motor base;
This rotating shaft, through the through hole at yoke center, the two ends of rotating shaft or wherein an end for running through the two ends of motor base or an end wherein respectively;
This bearing is installed in the two ends of motor base;
This external rotor is arranged in the motor base, and it comprises external rotor pedestal and outer rotor magnet; Wherein, this external rotor pedestal is fixedly arranged in the rotating shaft, and ladle cover is in the outer rim of internal stator; This outer rotor magnet is arranged at the inner edge of external rotor pedestal.
2, external-rotor motor according to claim 1, it is characterized in that wherein said yoke is provided with at the periphery of through hole runs through the axial fixing hole of this yoke, and is provided with screw and runs through this fixing hole and fix.
3, external-rotor motor according to claim 1 and 2 is characterized in that first pedestal and second pedestal of wherein said motor base, wherein:
This first pedestal, and be provided with location hole, to be the concentric circles location with internal stator;
This second pedestal is connected for being concentric circles with first pedestal, sets up in the inside of first pedestal and second pedestal and forms inner cavity chamber;
Above-mentioned bearing, it is provided with two bearings at least, and is installed in first pedestal and second pedestal respectively.
4, external-rotor motor according to claim 3 is characterized in that among two pedestals such as wherein said first pedestal and second pedestal, and one of them foundation design forms tubular, and cover cap is in the outer rim of internal stator and external rotor.
5, external-rotor motor according to claim 4 is characterized in that wherein said bearing is provided with two bearings, and is installed in respectively among first pedestal and second pedestal.
6, external-rotor motor according to claim 5 is characterized in that wherein said first foundation design forms tubular, and second pedestal then designs and forms the end cap shape, and cover is filled in the openend of first pedestal of tubular.
7, external-rotor motor according to claim 6, it is characterized in that wherein said internal stator yoke is provided with the location division, its structure structure that can be the protuberance made with punching structure on each sheet internal stator yoke engage mutually with recess, also can be to be provided with the location hole that runs through, and be provided with that alignment pin runs through this location hole and the structure of locating in internal stator yoke upper punch.
8, external-rotor motor according to claim 4, it is characterized in that wherein said motor base further comprises a bearing pedestal, this bearing pedestal is provided with the other end that the screw interlocking passes internal stator, and further be locked on first pedestal, be provided with an other bearing in this bearing pedestal and be installed in wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98124958 CN1084544C (en) | 1998-11-23 | 1998-11-23 | High-torque high-supporter efficient motor with external rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98124958 CN1084544C (en) | 1998-11-23 | 1998-11-23 | High-torque high-supporter efficient motor with external rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1254978A true CN1254978A (en) | 2000-05-31 |
| CN1084544C CN1084544C (en) | 2002-05-08 |
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ID=5228928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98124958 Expired - Fee Related CN1084544C (en) | 1998-11-23 | 1998-11-23 | High-torque high-supporter efficient motor with external rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1084544C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699716A (en) * | 2009-10-27 | 2010-04-28 | 常州奥立思特电子有限公司 | Electric machine |
| CN101141082B (en) * | 2006-09-07 | 2011-03-16 | 邱松进 | Closed type external rotor motor |
| CN108528691A (en) * | 2018-02-09 | 2018-09-14 | 广东莱盛隆电子股份有限公司 | A kind of plant protection drone |
-
1998
- 1998-11-23 CN CN 98124958 patent/CN1084544C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141082B (en) * | 2006-09-07 | 2011-03-16 | 邱松进 | Closed type external rotor motor |
| CN101699716A (en) * | 2009-10-27 | 2010-04-28 | 常州奥立思特电子有限公司 | Electric machine |
| CN108528691A (en) * | 2018-02-09 | 2018-09-14 | 广东莱盛隆电子股份有限公司 | A kind of plant protection drone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1084544C (en) | 2002-05-08 |
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