CN102739116A - Halbach-array-based magnetic coupling transmission device - Google Patents
Halbach-array-based magnetic coupling transmission device Download PDFInfo
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- CN102739116A CN102739116A CN2012102108558A CN201210210855A CN102739116A CN 102739116 A CN102739116 A CN 102739116A CN 2012102108558 A CN2012102108558 A CN 2012102108558A CN 201210210855 A CN201210210855 A CN 201210210855A CN 102739116 A CN102739116 A CN 102739116A
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Abstract
The invention discloses a halbach-array-based magnetic coupling transmission device, which comprises an input shaft, a bearing, a permanent magnet, a stator, a rotor, and an output shaft, wherein the output shaft and the input shaft are fixed on a support through bearings and bearing seats; the rotor and the input shaft are in transmission connection through a bearing arranged in the molding cavity in the rotor and are in clearance fit; the rotor and the output shaft are connected in a manner that the bearing is arranged eccentrically; the stator is nested outside the rotor and forms an eccentric mechanism with the rotor; the stator is fixed with a base; permanent magnets which can make the rotor rotate are arranged on the inside surface of the stator and the outside surface of the rotor respectively; an air gap is formed between the permanent magnets; and the magnetization directions of the two permanent magnet are arranged in an Halbach manner. The device overcomes the drawback caused by contact of the conventional mechanical gears and the drawbacks of low transmission torque density and small transmission ratio of the common permanent magnet gears.
Description
Technical field
The present invention relates to a kind of magnetic coupling transmission device based on the Halbach array.
Background technology
Present gear drive mainly is the transmission that is meshing with each other realizable force and speed that relies on mechanical gear, and its gearratio is constant, can realize more powerful transmission; But they are in the process of transmission; All require driving part and slave unit to be in contact with one another, thereby have wearing and tearing, noise, generation of vibration, need lubricated; Make with commentaries on classics and join the required precision height; Make the transmission mechanism of some mechanisms, especially some special purposes on version, seem comparatively complicated, and many factors that influences dynamic performance also are difficult to avoid.General permanent magnet gear transmission device belongs to the magnetic coupled drive; Can realize the non contact transmission of power, its handling ease, noncontact transmission and need not to lubricate; Thereby stable drive, cleaning, no friction energy loss, no greasy dirt, dustproof and waterproof; Detent torque is lower, have overload protective function, and features simple structure is easy to loading and unloading, maintenance and debugging.Can torque transmitted density and gearratio is less, the permanent magnet utilance is not high, the leakage field phenomenon is serious but its remarkable defective is an institute.
Summary of the invention
In order to overcome the existing machinery gear since the shortcoming that produced of contact and magnetic coupling transmission device can torque transmitted density, the gearratio smaller defect, the present invention provides a kind of simple in structure, the magnetic coupling transmission device based on the Halbach array that can realize bigger torque density and gearratio.
The technical scheme that the present invention adopts is:
Magnetic coupling transmission device based on the Halbach array; Comprise power shaft, bearing, permanent magnet, stator, rotor, output shaft; It is characterized in that: said output shaft and said power shaft are separately fixed on the support through bearing and bearing pedestal; Said rotor and said power shaft are in transmission connection and both matched in clearance through the bearing of said internal rotor die cavity, and said rotor adopts the connected mode of eccentric placement bearing in the bearing to be connected with said output shaft; Said stator is nested in said rotor outside and forms eccentric stiffener with said rotor; A said stator and a pedestal are fixed; Outer surface at said inner surface of stator and said rotor is provided with the said permanent magnet that can make said rotor rotation; Be provided with air gap between two said permanent magnets, the direction of magnetization of said permanent magnet is the Halbach mode and arranges.
Further, said power shaft adopts the eccentric shaft form, and the eccentric throw of eccentric shaft equates with eccentric throw between said stator and the rotor.
Be provided with a sleeve between the bearing of said internal rotor die cavity, the distance between the said bearing control through a sleeve and and power shaft between be the relation of interference fit.
Further; Adopt between said rotor and the output shaft that eccentric connected mode of placing second needle bearing guarantees that the motion of said output shaft is the rotation of single-degree-of-freedom in three group of first needle bearing, and the offset or dish between first, second needle bearing equates with eccentric throw between said stator and the rotor.
Further, said output shaft is made up of first, disk and second, and three said first is fixedly connected with said disk one end, and the said disk other end is connected with said second; Three said first links to each other with said rotor.
Further, said rotor tip offers three equally distributed blind holes, is provided with said first needle bearing in the said blind hole, and the degree of depth of said blind hole is consistent with the width and the external diameter of said first needle bearing respectively with diameter; Inner radius at said three first needle bearings respectively is provided with round-meshed cylinder, and said cylindrical height is consistent with the width and the internal diameter of said first needle bearing respectively with diameter; Circle hole centreline on the said cylinder and the distance of said cylindrical centerline offset and biasing equate with eccentric throw between said stator and the rotor; On three said cylindrical circular holes, be respectively equipped with said second needle bearing, the external diameter of said second needle bearing is consistent with the Circularhole diameter on the said cylinder, and three said second needle bearings are connected with three first respectively and both are interference fit.
Further, said rotor is one to have the cylinder matrix of die cavity; Said stator is a cylindrical base member.
Further, the diameter of said second diameter and said power shaft identical and with the axis conllinear of said stator.
The eccentric stiffener (axis stator and rotor axis skew are certain) that the present invention adopts rotor and stator to be nested; Its similar cycloid gear; Be a kind of planetary drive arrangement, just to be transformed into the fan-shaped permanent magnet that is closely linked and stator be discontiguous with epitrochanterian permanent magnet but leave working gas gap the stator of cycloid gear and the epitrochanterian gear teeth in the present invention.The connected mode that adopts eccentric placement second needle bearing in three group of first needle bearing is because 3 are confirmed that it also is to be the rotation of single-degree-of-freedom for the motion that guarantees output shaft that a plane makes motion more steady.
The permanent magnet arrangement mode adopts the Halbach array format on stator inner surface of the present invention and the rotor outer surface, and the gearratio that can realize is according to formula
(p
1, p
2Be respectively stator and rotor magnetic pole number and p
1>p
2) calculate, the absolute value that the number of magnetic poles that can know them differs the more little gearratio that it can be realized is big more.The present invention is under the not contacted situation of the permanent magnet on said epitrochanterian permanent magnet and the stator, and the distance of skew is big more, and minimum working gas gap value is more little, and its institute's ability torque transmitted is big more.
Halbach array permanent magnet technical characterictic:
Linear pattern Halbach array is most basic Halbach array composition form, and this array magnet can be regarded as the combination of a kind of radial arrays and tangential array, and its principle is as shown in Figure 1.The magnetization vector of desirable linear pattern Halbach array is to change continuously by sine curve, and the field intensity size of its high-intensity magnetic field one side also is to distribute by sinusoidal form, and the almost nil field intensity of opposite side.In practical application, owing to can't realize the continuous variation of the magnetizing direction of permanent magnet, usually adopt the magnetic patch that will disperse to be stitched together situation that near sinusoidal magnetizes.The present invention adopts cylindrical Halbach array format.Cylindrical Halbach array can be considered the crooked end to end toroidal that combines of linear pattern Halbach array, and according to direction of magnetization spin theory, the magnetization side of each permanent magnet fragment is θ
m=(1 ± p) θ
iθ
mBe the angle of permanent magnet fragment direction of magnetization relative coordinate initial point, p is the magnetic pole logarithm, θ
iBe the angle of i permanent magnet center relative coordinate initial point, "+" number is meant that permanent magnet produces inside magnetic field, and "-" expression produces outside magnetic field.The permanent magnet arrangement mode adopts the Halbach array; Can be enough minimum permanent magnet produces the strongest magnetic field and can make magnetic field on one side obtain once that the magnetic field of strong another side obtains weakening; Be easy to obtain monolateral magnetic field like this, leakage field obtains reducing, and the utilance of permanent magnet is improved.The number of magnetic poles of stator and rotor is more, and their are can torque transmitted big more, and every extremely contained permanent magnet number is many more, and more sinusoidalization of magnetic flux density that it can produce is can torque transmitted also big more.Thick more its institute's ability torque transmitted of permanent magnet is big more.The every utmost point of cylindrical Halbach array contains permanent magnet number such as Fig. 2.
The present invention when mounted, the axis and the axis stator conllinear of the end that power shaft needs to link to each other with shaft coupling, the axis conllinear of the axis of the other end and rotor.
Operation principle of the present invention: begin to suppose not have on rotor and the stator permanent magnet and rotor and power shaft to be fixed together; When power shaft rotates; Rotor integral body is also rotated thereupon; Because power shaft is an eccentric shaft, the axis conllinear of the pivot of rotor and the input of power shaft or stator, this moment, rotor had only revolution.If rotor and power shaft are not fixed connections but are connected and think that the quality of rotor is even distribution through the bearing at the internal rotor die cavity; Except the power that receives power shaft and self gravitation, do not receive under the situation of other any external force; Rotor also has only revolution, and its rotating speed equates with input shaft rotational speed.Then when we bonded permanent magnet and rotor on stator and rotor be to be connected with power shaft through bearing; When power shaft rotates; Because the magneticaction between permanent magnet; The existing revolution of rotor this moment also has the rotation of rotating around power shaft, and the cycloid permanent magnet gear just can transmit motion and torque as the traditional mechanical gear like this.Rotor and output shaft adopt eccentric connected mode of placing bearing in the bearing; And the offset or dish of bearing is consistent with the offset distance of stator center line and rotor centerline; Adopt three bearings to be because confirm that a plane makes that motion is more steady at 3, the motion that could guarantee output shaft like this is the rotation of single-degree-of-freedom.
Facts have proved, cycloid gear have at a high speed than and high-efficiency characteristics owing to adopted the Gear Planet Transmission principle, pto input shaft makes its type obtain as far as possible little size on same axial line, the stationary noise that turns round is low.For improving permanent magnet gear output torque, responding and realize miniaturization and fast, the air gap flux density that improves between rotor and the stator is a valid approach, and the method for raising air gap flux density can adopt permanent magnet to be the form of Halbach array.The magnetization vector of Halbach array is to change continuously by sine curve, and it is to distribute by sinusoidal form that the field intensity size of its high-intensity magnetic field one side obtains stack, and that opposite side is a null field is strong, obtains air gap flux density the most by force with the minimum permanent magnet like this.Therefore the present invention has adopted cycloid permanent magnet gear structure and permanent magnet to be two kinds of methods that combine of Halbach array format, makes the present invention that good utilization benefit arranged in conjunction with both advantages.
Beneficial effect of the present invention is embodied in:
1, the array way of permanent magnet adopts the Halbach array that bigger torque and gearratio can be provided;
2, realize the non contact transmission of power, its handling ease need not to lubricate, stable drive, cleaning, no friction energy loss, no greasy dirt, dustproof and waterproof;
3, detent torque lower, have an overload protective function;
4, features simple structure is easy to loading and unloading, maintenance and debugging.
Description of drawings
Fig. 1 is a linear pattern permanent magnet Halbach array sketch map.
Fig. 2 a is that permanent magnet number sketch map is contained in one section institute of the every utmost point of cylindrical Halbach array.
Fig. 2 b is that permanent magnet number sketch map is contained in two sections institutes of the every utmost point of cylindrical Halbach array.
Fig. 2 c is that permanent magnet number sketch map is contained in three sections institutes of the every utmost point of cylindrical Halbach array.
Fig. 2 d is that permanent magnet number sketch map is contained in four sections institutes of the every utmost point of cylindrical Halbach array.
Fig. 3 is a whole assembling section of the present invention.
Fig. 4 is the A-A direction view among Fig. 3 of the present invention.
Fig. 5 is the left view of support of the present invention.
Fig. 6 is the axonometric drawing (a) that the present invention removes support and pedestal.
Fig. 7 is the axonometric drawing (b) that the present invention removes support and pedestal.
Fig. 8 is the partial sectional view that the present invention removes support and pedestal axonometric drawing.
Fig. 9 is the axonometric drawing of 1,21,22,23 installation diagrams among Fig. 3 of the present invention.
Figure 10 is an output shaft axonometric drawing of the present invention.
Embodiment
With reference to Fig. 3 to Figure 10; Magnetic coupling transmission device based on the Halbach array; Comprise power shaft 1, bearing 3, permanent magnet 6, stator 9, rotor 8, output shaft; Said output shaft and said power shaft 1 are separately fixed on the support 4 through bearing 3 and bearing pedestal 2, and said rotor 8 is in transmission connection and both matched in clearance with the bearing 3 of said power shaft 1 through said rotor 8 inner die cavities, and said rotor 8 adopts the connected mode of eccentric placement bearing in the bearing to be connected with said output shaft; Said stator 9 is nested in said rotor 8 outsides and forms eccentric stiffener with said rotor 8; A said stator 9 and a pedestal 5 are fixing; Be provided with the said permanent magnet 6 that can make said rotor 8 rotations at the inner surface of said stator 9 and the outer surface of said rotor 8; Be provided with air gap between two said permanent magnets 6, the direction of magnetization of said permanent magnet 6 is the Halbach mode and arranges.
Further, said power shaft 1 adopts the eccentric shaft form, and the eccentric throw of eccentric shaft equates with eccentric throw between said stator 9 and the rotor 8.
Further, be provided with a sleeve 15 between the bearing 3 of said rotor 8 inner die cavities, the distance between the said bearing 3 control through a sleeve 15 and and power shaft 1 between be the relation of interference fit.
Further; Adopt between said rotor 8 and the output shaft 1 that eccentric connected mode of placing second needle bearing 14 guarantees that the motion of said output shaft is the rotation of single-degree-of-freedom in three group of first needle bearing 13, and first, second needle bearing 13, the offset or dish between 14 equate with eccentric throw between said stator 9 and the rotor 8.
Further, said output shaft is made up of first 10, disk 11 and second 7, and three said first 10 is fixedly connected with said disk 11 1 ends, and said disk 11 other ends are connected with said second 7; Three said first 10 links to each other with said rotor 8.
Further, said rotor 8 ends offer three equally distributed blind holes, are provided with said first needle bearing 13 in the said blind hole, and the degree of depth of said blind hole is consistent with the width and the external diameter of said first needle bearing 13 respectively with diameter; Inner radius at said three first needle bearings 13 respectively is provided with round-meshed cylinder 12, and the height of said cylinder 12 is consistent with the width and the internal diameter of said first needle bearing 13 respectively with diameter; Circle hole centreline on the said cylinder 12 and the distance of the centerline offset of said cylinder 12 and biasing equate with eccentric throw between said stator 9 and the rotor 8; On the circular hole of three said cylinders 12, be respectively equipped with said second needle bearing 14; The external diameter of said second needle bearing 14 is consistent with the diameter of said circular hole, and three said second needle bearings 14 are connected with three first 10 respectively and both are interference fit.
Further, said rotor 8 is one to have the cylinder matrix of die cavity; Said stator 9 is a cylindrical base member.
Further, the diameter of said second 7 diameter and said power shaft 1 identical and with the axis conllinear of said stator 9.
The eccentric stiffener (axis stator and rotor axis skew are certain) that the present invention adopts rotor 8 and stator 9 to be nested; Its similar cycloid gear; Be a kind of planetary drive arrangement, just to be transformed into the fan-shaped permanent magnet that is closely linked and stator be discontiguous with epitrochanterian permanent magnet but leave working gas gap the stator of cycloid gear and the epitrochanterian gear teeth in the present invention.The connected mode that adopts eccentric placement second needle bearing 14 in three group of first needle bearing 13 is because 3 are confirmed that it also is to be the rotation of single-degree-of-freedom for the motion that guarantees output shaft that planes make motion more steady.
With reference to Fig. 1, Fig. 2 a, 2b, 2c, 2d, the permanent magnet arrangement mode adopts the Halbach array format on stator 9 inner surfaces of the present invention and rotor 8 outer surfaces, and the gearratio that can realize is according to formula
(p
1, p
2Be respectively stator and rotor magnetic pole number and p
1>p
2) calculate, the absolute value that the number of magnetic poles that can know them differs the more little gearratio that it can be realized is big more.The present invention is under the not contacted situation of the permanent magnet on said epitrochanterian permanent magnet and the stator, and the distance of skew is big more, and minimum working gas gap value is more little, and its institute's ability torque transmitted is big more.
Halbach array permanent magnet technical characterictic:
Linear pattern Halbach array is most basic Halbach array composition form, and this array magnet can be regarded as the combination of a kind of radial arrays and tangential array, and its principle is as shown in Figure 1.The magnetization vector of desirable linear pattern Halbach array is to change continuously by sine curve, and the field intensity size of its high-intensity magnetic field one side also is to distribute by sinusoidal form, and the almost nil field intensity of opposite side.In practical application, owing to can't realize the continuous variation of the magnetizing direction of permanent magnet, usually adopt the magnetic patch that will disperse to be stitched together situation that near sinusoidal magnetizes.The present invention adopts cylindrical Halbach array format.Cylindrical Halbach array can be considered the crooked end to end toroidal that combines of linear pattern Halbach array, and according to direction of magnetization spin theory, the magnetization side of each permanent magnet fragment is θ
m=(1 ± p) θ
iθ
mBe the angle of permanent magnet fragment direction of magnetization relative coordinate initial point, p is the magnetic pole logarithm, θ
iBe the angle of i permanent magnet center relative coordinate initial point, "+" number is meant that permanent magnet produces inside magnetic field, and "-" expression produces outside magnetic field.The permanent magnet arrangement mode adopts the Halbach array; Can be enough minimum permanent magnet produces the strongest magnetic field and can make magnetic field on one side obtain once that the magnetic field of strong another side obtains weakening; Be easy to obtain monolateral magnetic field like this, leakage field obtains reducing, and the utilance of permanent magnet is improved.The number of magnetic poles of stator and rotor is more, and their are can torque transmitted big more, and every extremely contained permanent magnet number is many more, and more sinusoidalization of magnetic flux density that it can produce is can torque transmitted also big more.Thick more its institute's ability torque transmitted of permanent magnet is big more.The every utmost point of cylindrical Halbach array contains permanent magnet number such as Fig. 2.
The present invention when mounted, the axis and the stator 9 axis conllinear of the end that power shaft 1 needs to link to each other with shaft coupling, the axis conllinear of the axis of the other end and rotor 8.
Operation principle of the present invention: begin to suppose not have on rotor 8 and the stator 9 permanent magnet 6 and rotor 8 to be fixed together with power shaft 1; When power shaft 1 rotation; Rotor 8 integral body are also rotated thereupon; Because power shaft 1 is an eccentric shaft, the input of the pivot of rotor 8 and power shaft 1 or the axis conllinear of stator 9, this moment, rotor 8 had only revolution.If rotor 8 and power shaft 1 are not fixed connections but are connected and think that the quality of rotor 8 is even distributions through the bearing 3 at rotor 8 inner die cavities; Except the power that receives power shaft 1 and self gravitation, do not receive under the situation of other any external force; Rotor 8 also has only revolution, and its rotating speed equates with the rotating speed of power shaft 1.Then when we bonded permanent magnet 6 and rotor 8 on stator 9 and rotor 8 be to be connected with power shaft 1 through bearing 3; When power shaft 1 rotation; Because the magneticaction that permanent magnet is 6; This moment, rotor 8 existing revolution also had the rotation around power shaft 1 rotation, and the cycloid permanent magnet gear just can transmit motion and torque as the traditional mechanical gear like this.Rotor 8 adopts eccentric connected mode of placing bearing in the bearing with output shaft 1; And the offset or dish of bearing is consistent with the offset distance of stator center line and rotor centerline; Adopt three bearings to be because confirm that a plane makes that motion is more steady at 3, the motion that could guarantee output shaft like this is the rotation of single-degree-of-freedom.
Facts have proved, cycloid gear have at a high speed than and high-efficiency characteristics owing to adopted the Gear Planet Transmission principle, pto input shaft makes its type obtain as far as possible little size on same axial line, the stationary noise that turns round is low.For improving permanent magnet gear output torque, responding and realize miniaturization and fast, the air gap flux density that improves between rotor and the stator is a valid approach, and the method for raising air gap flux density can adopt permanent magnet to be the form of Halbach array.The magnetization vector of Halbach array is to change continuously by sine curve, and it is to distribute by sinusoidal form that the field intensity size of its high-intensity magnetic field one side obtains stack, and that opposite side is a null field is strong, obtains air gap flux density the most by force with the minimum permanent magnet like this.Therefore the present invention has adopted cycloid permanent magnet gear structure and permanent magnet to be two kinds of methods that combine of Halbach array format, makes the present invention that good utilization benefit arranged in conjunction with both advantages.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; Protection scope of the present invention should not be regarded as and only limit to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (8)
1. based on the magnetic coupling transmission device of Halbach array; Comprise power shaft, bearing, permanent magnet, stator, rotor, output shaft; It is characterized in that: said output shaft and said power shaft are separately fixed on the support through bearing and bearing pedestal; Said rotor and said power shaft are in transmission connection and both matched in clearance through the bearing of said internal rotor die cavity, and said rotor adopts the connected mode of eccentric placement bearing in the bearing to be connected with said output shaft; Said stator is nested in said rotor outside and forms eccentric stiffener with said rotor; A said stator and a pedestal are fixed; Outer surface at said inner surface of stator and said rotor is provided with the said permanent magnet that can make said rotor rotation; Be provided with air gap between two said permanent magnets, the direction of magnetization of said permanent magnet is the Halbach mode and arranges.
2. the magnetic coupling transmission device based on the Halbach array as claimed in claim 1 is characterized in that: said power shaft adopts the eccentric shaft form, and the eccentric throw of eccentric shaft equates with eccentric throw between said stator and the rotor.
3. the magnetic coupling transmission device based on the Halbach array as claimed in claim 1; It is characterized in that: be provided with a sleeve between the bearing of said internal rotor die cavity, the distance between the said bearing control through a sleeve and and power shaft between be the relation of interference fit.
4. the magnetic coupling transmission device based on the Halbach array as claimed in claim 1; It is characterized in that: adopt between said rotor and the output shaft that eccentric connected mode of placing second needle bearing guarantees that the motion of said output shaft is the rotation of single-degree-of-freedom in three group of first needle bearing, and the offset or dish between first, second needle bearing equates with eccentric throw between said stator and the rotor.
5. the magnetic coupling transmission device based on the Halbach array as claimed in claim 1; It is characterized in that: said output shaft is made up of first, disk and second; Three said first is fixedly connected with said disk one end, and the said disk other end is connected with said second; Three said first links to each other with said rotor.
6. the magnetic coupling transmission device based on the Halbach array as claimed in claim 5; It is characterized in that: said rotor tip offers three equally distributed blind holes; Be provided with said first needle bearing in the said blind hole, the degree of depth of said blind hole is consistent with the width and the external diameter of said first needle bearing respectively with diameter; Inner radius at said three first needle bearings respectively is provided with round-meshed cylinder, and said cylindrical height is consistent with the width and the internal diameter of said first needle bearing respectively with diameter; Circle hole centreline on the said cylinder and the distance of said cylindrical centerline offset and biasing equate with eccentric throw between said stator and the rotor; On three said cylindrical circular holes, be respectively equipped with said second needle bearing; The diameter of the circular hole on the external diameter of said second needle bearing and the said cylinder is consistent, and three said second needle bearings are connected with three first respectively and both are interference fit.
7. the magnetic coupling transmission device based on the Halbach array as claimed in claim 1 is characterized in that: said rotor is one to have the cylinder matrix of die cavity; Said stator is a cylindrical base member.
8. the magnetic coupling transmission device based on the Halbach array as claimed in claim 1 is characterized in that: said second diameter identical with the diameter of said power shaft and with the axis conllinear of said stator.
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| CN2012102108558A CN102739116A (en) | 2012-06-25 | 2012-06-25 | Halbach-array-based magnetic coupling transmission device |
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| CN103269147A (en) * | 2012-12-31 | 2013-08-28 | 苏大卫 | Magnetic levitation planetary transmission speed control machine |
| CN103269147B (en) * | 2012-12-31 | 2016-04-20 | 苏大卫 | Magnetic floating star transmission gear shift machine |
| CN103117686A (en) * | 2013-03-07 | 2013-05-22 | 包头稀土研究院 | Coupler |
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| US10715025B2 (en) | 2015-10-01 | 2020-07-14 | National Oilwell Varco, L.P. | Radial magnetic cycloid gear assemblies, and related systems and methods |
| EP3357149A4 (en) * | 2015-10-01 | 2019-08-07 | National Oilwell Varco, L.P. | Radial magnetic cycloid gear assemblies, and related systems and methods |
| CN106438690B (en) * | 2016-07-18 | 2018-08-14 | 中铁二院工程集团有限责任公司 | A kind of electronic magnetic bearing of coil type axial permanent magnetic |
| CN106438690A (en) * | 2016-07-18 | 2017-02-22 | 中铁二院工程集团有限责任公司 | Coiled axial permanent-magnetic electric magnetic levitation bearing |
| CN108199562A (en) * | 2018-03-22 | 2018-06-22 | 大连交通大学 | A kind of integrated form permanent magnetic transmission device of coaxial both-end output |
| CN110034659A (en) * | 2019-05-24 | 2019-07-19 | 三峡大学 | A kind of Halbach array bias magnetic-gear |
| CN110336451A (en) * | 2019-08-12 | 2019-10-15 | 上海微电机研究所(中国电子科技集团公司第二十一研究所) | A kind of combined type bias magnetic force harmonic gear transmission device |
| CN110535321B (en) * | 2019-09-05 | 2020-06-26 | 安徽理工大学 | Halbach array coupler |
| CN110535321A (en) * | 2019-09-05 | 2019-12-03 | 安徽理工大学 | A kind of Halbach array formula coupler |
| WO2021072615A1 (en) * | 2019-10-15 | 2021-04-22 | 安徽理工大学 | Halbach array type coupler |
| EP4177495A4 (en) * | 2020-07-06 | 2023-12-27 | Osaka University | Magnetic gear, actuator unit having the same, and link mechanism using the same |
| WO2022062302A1 (en) * | 2020-09-28 | 2022-03-31 | 江苏大学 | 90° halbach-arranged double-layer permanent magnet rotor magnetic coupler |
| CN113294496A (en) * | 2021-07-01 | 2021-08-24 | 上海交通大学 | Magnetic auxiliary transmission cycloidal pin wheel speed reducer |
| CN113294496B (en) * | 2021-07-01 | 2022-05-20 | 上海交通大学 | Magnetic auxiliary transmission cycloidal pin wheel speed reducer |
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Application publication date: 20121017 |