CN106337892A - Eddy-current damping magnetic spring - Google Patents
Eddy-current damping magnetic spring Download PDFInfo
- Publication number
- CN106337892A CN106337892A CN201610857360.2A CN201610857360A CN106337892A CN 106337892 A CN106337892 A CN 106337892A CN 201610857360 A CN201610857360 A CN 201610857360A CN 106337892 A CN106337892 A CN 106337892A
- Authority
- CN
- China
- Prior art keywords
- eddy
- permanent magnet
- magnet array
- halbach permanent
- current damping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention relates to an eddy-current damping magnetic spring. The eddy-current damping magnetic spring comprises a first halbach permanent magnet array and a second halbach permanent magnet array, wherein one of the first halbach permanent magnet array and the second halbach permanent magnet array is a stator, and the other of the first halbach permanent magnet array and the second halbach permanent magnet array is a rotor. The first halbach permanent magnet array and the second halbach permanent magnet array are provided with first end faces close to each other and second end faces away from each other correspondingly. A gap is formed between the first end face of the first halbach permanent magnet array and the first end face of the second halbach permanent magnet array. The eddy-current damping magnetic spring further comprises an eddy-current damping piece which is located on the second end face of the first halbach permanent magnet array or the second end face of the second halbach permanent magnet array. The damping rotary positioning spring provided by the invention has the advantages that the positioning rigidity is high, switching is rapid, and excessive vibration is avoided.
Description
Technical field
The present invention relates to a kind of damping positioning element is and in particular to a kind of eddy-current damping magnetic spring.
Background technology
Torsional spring with positioning function is widely applied in industrial circle and life, and the single or double acting door of such as mansion can
To navigate to "ON" and "off" state；The turntable of the loading workpiece on automatic production line is it is also desirable in each fixed angles
Degree switching.Locating stiffness is high, orientation angle switching is rapid, is the basic demand of industrial position rotating spring.
Halbach array of magnetic dipoles, by the magnetic pole of magnetic field angle rotation arrangement is bolted together, forms one side high intensity
Magnetic field.The stator being separately constituted with halbach array of magnetic dipoles and rotor, its magnetic field intensity is higher than common pole arrangement, so
It is provided that higher detent torque and switch speed.As United States Patent (USP) us7265470a discloses a kind of retaining spring, including straight
Wire or annular two halbach permanent magnet arrays, by the interaction between permanent magnet array, realize linear movement or
Person's rotary motion.However, position rotating spring disclosed in above-mentioned patent is due to undamped, during rotation too quickly be easily caused too high
Centrifugal force so that equalization point vibration, brings to the equipment carrying on spring and unnecessary rock and impact.For example, if will be above-mentioned
The rotational positioning spring of patent is attached on single or double acting door, and during on/off switch, single or double acting door can move to fiercely and open or close
Equalization point at it is clear that being unfavorable for the operation and maintenance of single or double acting door.Therefore, there is rotation or move along a straight line in common retaining spring
Too quickly non-cushioned problem.
Content of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of eddy-current damping magnetic spring, main utilization
The leakage field phenomenon at the halbach permanent magnet array back side, it is achieved that the magnet spring of high locating stiffness, switching at a high speed, can be used for quick
In switching construction, alleviate the excessively fierce dynamic characteristic of magnet spring switching using eddy current principle simultaneously again, and not shadow
Ring the static characteristic of high locating stiffness, be that industry provides a kind of high locating stiffness, switches rapid but will not produce with civil area
The damping rotational positioning spring of raw undue vibration.
In order to realize foregoing invention purpose, the present invention employs the following technical solutions to realize:
A kind of eddy-current damping magnetic spring, including a halbach permanent magnet array and the 2nd halbach permanent magnet array,
A described halbach permanent magnet array and described 2nd halbach permanent magnet array one of which are stator, and another one is rotor；
A described halbach permanent magnet array and the 2nd halbach permanent magnet array be respectively provided near other side first end face and away from
The of the second end face of other side, the first end face of a described halbach permanent magnet array and described 2nd halbach permanent magnet array
It is formed with gap between end face；This eddy-current damping magnetic spring also includes eddy-current damping part；Described eddy-current damping part
Positioned at the second end face of a described halbach permanent magnet array or the second end face of described 2nd halbach permanent magnet array.
Further, a described halbach permanent magnet array, described 2nd halbach permanent magnet array and described electricity whirlpool
Flow resistance damping member is annular, a wherein said halbach permanent magnet array and the coaxial ground diameter of described 2nd halbach permanent magnet array
To sheathed, described eddy-current damping part near or be fixedly installed on the second end face or second of a halbach permanent magnet array
The second end face of halbach permanent magnet array.
Further, a described halbach permanent magnet array, described 2nd halbach permanent magnet array and described electricity whirlpool
Flow resistance damping member is annular, a wherein said halbach permanent magnet array and the coaxial earth's axis of described 2nd halbach permanent magnet array
To being stacked, described eddy-current damping part near or be fixedly installed on a halbach permanent magnet array second end face or
The second end face of the 2nd halbach permanent magnet array.
Further, described eddy-current damping part is made of metal.
Further, described eddy-current damping part is integrally formed by metal and makes；Or described eddy-current damping part
It is to be made up of the bonding jumper of multiple mutual insulatings being arranged side by side.
Further, described eddy-current damping part is that have variable-resistance eddy-current damping part.
Further, described eddy-current damping part has the metal bottom of annular, metal bottom has been arranged side by side multiple
The bonding jumper of mutual insulating.
Further, described eddy-current damping part is provided with slide rheostat, described slide rheostat is used for adjusting electricity
The resistance of eddy current damping part；Or, described eddy-current damping part is provided with on-off circuit, described on-off circuit is used for adjusting electricity
The resistance of eddy current damping part.
Further, a described halbach permanent magnet array and described 2nd halbach permanent magnet array are equivalently-sized.
Further, the positioning interval of a halbach permanent magnet array and described 2nd halbach permanent magnet array is
360 °/n, wherein anchor point n is the positive integer more than or equal to 1.
Beneficial effects of the present invention:
1. the present invention mainly utilize the halbach permanent magnet array back side leakage field phenomenon (magnet steel is thinner, and leakage field phenomenon is tighter
Weight) realize magnet spring, it is so designed that the material that can save magnet steel；Inside and outside halbach permanent magnet array is arranged face-to-face simultaneously, in
Between air gap very little, therefore with just can the bigger static immobilization moment of torsion of the common retaining spring of producing ratio than relatively thin magnetic pole；
2. the present invention adopts eddy-current damping part, by increasing capacitance it is possible to increase the Dynamic Damp Characteristics of retaining spring are so that retaining spring
Buffered in action, whole course of action more gentle it is therefore prevented that the appearance of the too quickly phenomenon of course of action；
3. the eddy-current damping part of the present invention has variable resistor, can be precisely controlled the damping system under diverse location
Number, customizes out more accurate damping characteristic.
Brief description
Fig. 1 a is the first structural representation of eddy-current damping magnetic spring embodiment 1 of the present invention；
Fig. 1 b is the second structural representation of eddy-current damping magnetic spring embodiment 1 of the present invention；
Fig. 1 c is a halbach permanent magnet array of first embodiment of the invention and the magnetic of the 2nd halbach permanent magnet array
Pole schematic diagram；
Fig. 2 a, 2b and 2c are respectively the different embodiments of the eddy-current damping part of fixing damping in the present invention；
Fig. 3 is a kind of embodiment of the eddy-current damping part of adaptive damping in the present invention；
Fig. 4 is the structural representation of eddy-current damping magnetic spring embodiment 2 of the present invention.
Specific embodiment
For making the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.But those skilled in the art know, the invention is not limited in accompanying drawing and following reality
Apply example.
Embodiment 1:
Fig. 1 a, 1b and 1c are the first embodiments for eddy-current damping magnetic spring proposed by the present invention.In this embodiment
In, this eddy-current damping magnetic spring is the barrel shape spring of each composition sheathed formation of structure.This eddy-current damping magnetic spring 1
Composition structure includes a halbach permanent magnet array 12, the 2nd halbach permanent magnet array 13 and eddy-current damping part 14.Institute
Stating a halbach permanent magnet array and described 2nd halbach permanent magnet array one of which is stator, and another one is rotor,
In the present embodiment, a halbach permanent magnet array 12 is stator, is connected with outside fixed structure；2nd halbach permanent magnetism battle array
Row 13 are rotor, can be connected with bearing or other supporting constructions.
First halbach permanent magnet array 12, the 2nd halbach permanent magnet array 13 and eddy-current damping part 14 are annular, the
One halbach permanent magnet array 12 and the 2nd halbach permanent magnet array 13 are coaxially disposed, and a halbach permanent magnet array 12 is arranged
In the outer shroud direction (the outer shroud direction as shown in Fig. 1 a, 1b) of the 2nd halbach permanent magnet array 13, a halbach permanent magnetism battle array
It is provided with a gap, so that the 2nd halbach permanent magnet array 13 can be smooth between row 12 and the 2nd halbach permanent magnet array 13
Rotation, is rotated with respect to a halbach permanent magnet array 12 by the 2nd halbach permanent magnet array 13, produces radial magnetic field.Excellent
Selection of land, gap is radially sized to 0.2 to 0.5mm.
Eddy-current damping part 14 can be arranged on or near a halbach permanent magnet array 12 away from the 2nd halbach
The end face of permanent magnet array 13, as shown in Figure 1a；Can also be arranged on the 2nd halbach permanent magnet array 13 away from first
The end face of halbach permanent magnet array 12, as shown in Figure 1 b.I.e. eddy-current damping part 14 both may be provided on stator it is also possible to set
Put on rotor.
In Fig. 1 a, eddy-current damping part 14 be arranged on a halbach permanent magnet array 12 away from the 2nd halbach permanent magnetism
During the end face of array 13, eddy-current damping part 14 can be fixedly installed on this end face of a halbach permanent magnet array 12.Electric whirlpool
Flow resistance damping member 14 near the end face away from the 2nd halbach permanent magnet array 13 for the halbach permanent magnet array 12 when, current vortex
Damping piece 14 can be fixed on the fixed structure of this outside.
In Fig. 1 b, eddy-current damping part 14 be arranged on the 2nd halbach permanent magnet array 13 away from a halbach permanent magnetism
During the end face of array 12, eddy-current damping part 14 is fixedly installed on this end face of the 2nd halbach permanent magnet array 13, and can be with
2nd halbach permanent magnet array 13 rotates.Or eddy-current damping part 14 is not fixedly installed on the 2nd halbach permanent magnet array 13
The end face away from a halbach permanent magnet array 12, and be proximate to this end face, and not with the 2nd halbach permanent magnet array
13 rotations.
Eddy-current damping part 14 may be selected to be made up of the good metal of electric conductivity, preferably copper or aluminium.
In order to change damping, the eddy-current damping part of different damping can be made by selecting the metal of different resistivity,
The higher metal of resistivity, damping is relatively low；Also damping can be changed by adjusting the metal thickness of eddy-current damping part 14.
In addition, eddy-current damping part 14 can be by metal be integrally formed making it is also possible to by the domain is subdivided into
The slice of mutual insulating.Contribute to reducing eddy current damping, subdivision degree by the way of the slice that the domain is subdivided into mutual insulating
Bigger, damping is less, and as shown in Fig. 2 a, Fig. 2 b, Fig. 2 c, eddy-current damping part is made up of the bonding jumper of mutual insulating.Equal bar
Under part, the resistivity of the resistivity ratio integrally formed eddy-current damping part of eddy-current damping part that bonding jumper is constituted is less, institute
The damping producing is also less.
Eddy-current damping part 14 except can be the eddy-current damping part of aforesaid fixing damping, can also be have variable
The eddy-current damping part of damping.Fig. 3 gives a kind of schematic diagram of the eddy-current damping part of adaptive damping, wherein this current vortex resistance
Damping member has the metal bottom 31 of an annular, and metal bottom 31 is provided with the bonding jumper 32 of mutual insulating.Realize this current vortex
The mode of the adaptive damping of damping piece can be to arrange slide rheostat (not shown) on bonding jumper 32 top, by sliding
Rheostatic motion changes the resistance of eddy-current damping part, thus changing damping.If each phase loop of eddy-current damping part
Short circuit closure, the resistance of eddy-current damping part is the resistance of the domain, becomes eddy-current damping magnetic spring maximum damping mode；When
Slide rheostat slides on bonding jumper, will produce different loop resistances under diverse location, thus producing customizable
Damping characteristic.
Moreover, it is achieved that the damping characteristic of this eddy-current damping part can also be realized by switching circuitry, switching circuitry control
The system open/close pwm in loop dutycycle under different angles, thus control loop closing time, and then control damping torque so that it may
Damping characteristic with real-time control eddy-current damping part.
As illustrated in figure 1 c, eddy-current damping magnetic spring 1 employs the scheme to pole for the domain 3, and that is, a whole circle has 3 to determine
Site.In addition to scheme shown in except Fig. 1, eddy-current damping magnetic spring can be according to the demand of the anglec of rotation, using a domain n
Scheme to pole, i.e. a whole circle n anchor point of setting, a halbach permanent magnet array 12 and the 2nd halbach permanent magnet array 13
Positioning interval be 360 °/n, wherein n be integer, n be more than or equal to 1.
Shown in Fig. 1 c be halbach permanent magnet array each pair extremely in adjacent little magnetic patch magnetic direction with 60 ° rotate
(according to the setting of standard halbach permanent magnet array, the therefore direction of the not shown each little magnetic patch of in figure), actually magnetic direction is permissible
180 °/m rotates, and m is the quantity of the extremely medium and small magnetic patch of each pair, and m is the positive integer more than 1.When m=2,3,4,5,6 ... when, right
The anglec of rotation of the magnetic direction answered be 90 °, 60 °, 45 °, 36 °, 30 ° ....Each little magnetic in first halbach permanent magnet array
In the magnetic direction of block and the 2nd halbach permanent magnet array, the magnetic direction of each little magnetic patch is consistent.
Embodiment 2:
As shown in figure 4, eddy-current damping magnetic spring of the present invention may be arranged as each composition structure sheaf folds setting formation
Disc spring.In the second embodiment of the present invention, eddy-current damping magnetic spring 4 includes a halbach of annular forever
Magnetic array 42, the 2nd halbach permanent magnet array 43 and eddy-current damping part 44, a described halbach permanent magnet array 42 He
Described 2nd halbach permanent magnet array 43 one of which is stator, and another one is rotor.Wherein the first halbach permanent magnet array
42 and the 2nd halbach permanent magnet array 43 be annular, and be coaxially disposed, a halbach permanent magnet array 42 is arranged on second
The top (top as shown in Figure 4) of halbach permanent magnet array 43, eddy-current damping part 44 is fixedly installed on or near second
The lower surface of halbach permanent magnet array 43.Set between first halbach permanent magnet array 42 and the 2nd halbach permanent magnet array 43
It is equipped with a gap 45, a halbach permanent magnet array 42 and the 2nd halbach permanent magnet array 43 can rotate against, produce axially
Magnetic field.
Wherein, eddy-current damping part 44 can also be changed to be fixedly installed on or near a halbach permanent magnet array 42
Upper surface.
A described halbach permanent magnet array and described 2nd halbach permanent magnet array are equivalently-sized.
In the present embodiment, content same as Example 1 will not be described here.
Eddy-current damping magnetic spring proposed by the present invention, due to using eddy-current damping part, by increasing capacitance it is possible to increase retaining spring
Dynamic Damp Characteristics so that retaining spring is buffered in action, whole course of action more gentle it is therefore prevented that action
The appearance of the too quickly phenomenon of journey.And simultaneously, the eddy-current damping part of the present invention may be configured as with variable-resistance eddy-current damping
Part, can be precisely controlled the damped coefficient under diverse location, customize out more accurate damping characteristic.
More than, embodiments of the present invention are illustrated.But, the present invention is not limited to above-mentioned embodiment.All
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement done, combination etc., should be included in the present invention
Protection domain within.
Claims (10)
1. a kind of eddy-current damping magnetic spring, including a halbach permanent magnet array and the 2nd halbach permanent magnet array, institute
Stating a halbach permanent magnet array and described 2nd halbach permanent magnet array one of which is stator, and another one is rotor；Institute
State a halbach permanent magnet array and the 2nd halbach permanent magnet array is respectively provided near the first end face of other side and away from right
The second end face of side, the first end face of a described halbach permanent magnet array and the first of described 2nd halbach permanent magnet array
It is formed with gap between end face；It is characterized in that, this eddy-current damping magnetic spring also includes eddy-current damping part；Described electricity whirlpool
Flow resistance damping member is located at the of the second end face of a described halbach permanent magnet array or described 2nd halbach permanent magnet array
Biend.
2. eddy-current damping magnetic spring according to claim 1 it is characterised in that: a described halbach permanent magnetism battle array
Row, described 2nd halbach permanent magnet array and described eddy-current damping part are annular, and a wherein said halbach is forever
Magnetic array and described 2nd halbach permanent magnet array are coaxially radially sheathed, and described eddy-current damping part is close or is fixedly installed
In the second end face of a halbach permanent magnet array or the second end face of the 2nd halbach permanent magnet array.
3. eddy-current damping magnetic spring according to claim 1 it is characterised in that: a described halbach permanent magnetism battle array
Row, described 2nd halbach permanent magnet array and described eddy-current damping part are annular, and a wherein said halbach is forever
Magnetic array and described 2nd halbach permanent magnet array coaxially axially stacked setting, described eddy-current damping part is close or fixing
It is arranged on the second end face of a halbach permanent magnet array or the second end face of the 2nd halbach permanent magnet array.
4. eddy-current damping magnetic spring according to any one of claim 1 to 3 it is characterised in that: described current vortex
Damping piece is made of metal.
5. eddy-current damping magnetic spring according to claim 4 it is characterised in that: described eddy-current damping part is by gold
Belong to being integrally formed and make；Or described eddy-current damping part is to be made up of the bonding jumper of multiple mutual insulatings being arranged side by side.
6. eddy-current damping magnetic spring according to claim 4 it is characterised in that: described eddy-current damping part is that have
Variable-resistance eddy-current damping part.
7. eddy-current damping magnetic spring according to claim 6 it is characterised in that: described eddy-current damping part has ring
The metal bottom of shape, metal bottom is arranged side by side the bonding jumper of multiple mutual insulatings.
8. eddy-current damping magnetic spring according to claim 7 it is characterised in that: on described eddy-current damping part arrange
There is slide rheostat, described slide rheostat is used for adjusting the resistance of eddy-current damping part；
Or, described eddy-current damping part is provided with on-off circuit, described on-off circuit is used for adjusting eddy-current damping part
Resistance.
9. eddy-current damping magnetic spring according to claim 3 it is characterised in that: a described halbach permanent magnetism battle array
Row and described 2nd halbach permanent magnet array are equivalently-sized.
10. the eddy-current damping magnetic spring according to Claims 2 or 3 it is characterised in that: a halbach permanent magnetism battle array
The positioning interval of row and described 2nd halbach permanent magnet array is 360 °/n, and wherein anchor point n is just whole more than or equal to 1
Number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610857360.2A CN106337892B (en) | 2016-09-27 | 2016-09-27 | A kind of eddy-current damping magnetic spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610857360.2A CN106337892B (en) | 2016-09-27 | 2016-09-27 | A kind of eddy-current damping magnetic spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106337892A true CN106337892A (en) | 2017-01-18 |
| CN106337892B CN106337892B (en) | 2018-11-13 |
Family
ID=57840278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610857360.2A Active CN106337892B (en) | 2016-09-27 | 2016-09-27 | A kind of eddy-current damping magnetic spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106337892B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019119705A1 (en) * | 2017-12-21 | 2019-06-27 | 东南大学 | Eddy current three-dimensional damping device |
| CN110118235A (en) * | 2019-05-16 | 2019-08-13 | 南京理工大学 | A kind of built-in permanent magnetic array axial direction eddy current damper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7265470B1 (en) * | 2004-01-13 | 2007-09-04 | Launchpoint Technologies, Inc. | Magnetic spring and actuators with multiple equilibrium positions |
| CN101707405A (en) * | 2009-11-30 | 2010-05-12 | 哈尔滨工业大学 | Halbach array external rotor of composite-structure permanent magnet motor |
| CN102170183A (en) * | 2010-11-19 | 2011-08-31 | 王乃兵 | Protective HALBACH (Halbach) permanent magnet synchronous motor rotor |
| JP2014192942A (en) * | 2013-03-26 | 2014-10-06 | Atec Corp | Rotary machine |
| JP2015122834A (en) * | 2013-12-20 | 2015-07-02 | Ntn株式会社 | Rotary electric machine |
-
2016
- 2016-09-27 CN CN201610857360.2A patent/CN106337892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7265470B1 (en) * | 2004-01-13 | 2007-09-04 | Launchpoint Technologies, Inc. | Magnetic spring and actuators with multiple equilibrium positions |
| CN101707405A (en) * | 2009-11-30 | 2010-05-12 | 哈尔滨工业大学 | Halbach array external rotor of composite-structure permanent magnet motor |
| CN102170183A (en) * | 2010-11-19 | 2011-08-31 | 王乃兵 | Protective HALBACH (Halbach) permanent magnet synchronous motor rotor |
| JP2014192942A (en) * | 2013-03-26 | 2014-10-06 | Atec Corp | Rotary machine |
| JP2015122834A (en) * | 2013-12-20 | 2015-07-02 | Ntn株式会社 | Rotary electric machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019119705A1 (en) * | 2017-12-21 | 2019-06-27 | 东南大学 | Eddy current three-dimensional damping device |
| CN110118235A (en) * | 2019-05-16 | 2019-08-13 | 南京理工大学 | A kind of built-in permanent magnetic array axial direction eddy current damper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106337892B (en) | 2018-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5796906B2 (en) | Motor that can be reconfigured from induction to synchronous | |
| EP3196505B1 (en) | Outer cup rotary axial eddy current damper | |
| AU2008361023B2 (en) | A wave-power unit, and a use of a such | |
| JP2014126177A5 (en) | ||
| WO2015139404A1 (en) | Axial eddy-current damping device based on helical transmission mode | |
| CN110212725A (en) | A kind of adjustable magnetic chain magnetic isolation plate structure for permanent magnet machine rotor | |
| CN106337892A (en) | Eddy-current damping magnetic spring | |
| CN104455143B (en) | Magnetic damper with floating magnetic ring | |
| CN102714443A (en) | Rotary single-phase electromagnetic actuator | |
| CA2945369A1 (en) | Permanent magnet speed governor with fixed magnetic gap | |
| CN105703510A (en) | Axial magnetic field printed circuit board permanent magnet brushless DC motor | |
| JPH04307132A (en) | Multidimensional damper gear | |
| CN102195537A (en) | Partitioned winding magnetic suspension spherical induction motor | |
| WO2019174114A1 (en) | Rotating device and rotating radar device | |
| CN106246784B (en) | A kind of eddy-current damping magnetic spring based on multiple halbach permanent magnet arrays | |
| EP3268262B1 (en) | Dual rotor torque generating devices, systems, and methods | |
| CN103075423B (en) | Passive magnetic bearing and assemblies thereof | |
| US6282961B1 (en) | Permanent magnet rotary accelerometer | |
| CN107237850A (en) | A kind of damping retaining spring based on halbach permanent magnet arrays | |
| CN108166641A (en) | A kind of current vortex three-dimensional vibration absorber | |
| EP2373901A1 (en) | Electrodynamic actuator | |
| CN202085107U (en) | Magnetic levitation spherical induction motor winding structure | |
| JP4125747B2 (en) | Commutator | |
| JP2006006026A (en) | Rotor and rotating electric machine equipped therewith | |
| CN202155888U (en) | Regional winding induction type magnetic suspension spherical active joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |