CN110120735A - A kind of permanent magnet soft starter - Google Patents
A kind of permanent magnet soft starter Download PDFInfo
- Publication number
- CN110120735A CN110120735A CN201810112635.9A CN201810112635A CN110120735A CN 110120735 A CN110120735 A CN 110120735A CN 201810112635 A CN201810112635 A CN 201810112635A CN 110120735 A CN110120735 A CN 110120735A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- rotor
- permanent
- soft starter
- driven rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
- H02K49/043—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with a radial airgap
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/108—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with an axial air gap
Abstract
The present invention relates to a kind of permanent magnet soft starters of asynchronous soft start synchronous operation.Specifically, it on power rotor by being arranged two groups of permanent magnetic steels, with metallic conductor on driven rotor and permanent magnetic steel radial magnetic coupling and axial magnetic coupling occur for two groups of magnet steel respectively, and real-time measurement is carried out by revolving speed of the control mechanism to power rotor and driven rotor, feed back executing agency, the variation of the Radial Coupling area of accurate control metallic conductor and permanent magnetic steel, to control transmitted torque size and soft start required for the time, after the completion of soft start, synchronous operation is switched to, soft stop function is provided simultaneously with.Permanent magnet transmission of the invention has both the advantages of asynchronous soft start, synchronous operation and soft stop, in startup stage coupling process can be accurately controlled by control mechanism and executing agency, vibration isolation and damping effect is good, suitable for the heavy load startings such as large-scale belt conveyor, ball mill and synchronous operation stage, transmission efficiency is high, power rotor and driven rotor without slippage, without vortex temperature rise.In addition, the permanent magnet soft starter structure is simple, centering flexibility is higher, simple installation.
Description
Technical field
The present invention relates to mechanical transmission fields, more specifically, it is related to a kind of permanent magnet soft starter.
Background technique
Soft starting mode is broadly divided into electrical soft start and mechanical soft start two major classes.Wherein electrical soft-start time need to be with
Basic machine matches, therefore the starting time is often restricted, and ideal starting effect is not achieved.Currently, mechanical soft start side
Formula mainly has: coupling fluid-structure transmission, permanent-magnet eddy current transmission and U.S. CST soft start.Coupling fluid-structure transmission starting the time with it is hydraulic
Oil level is not in a linear relationship, be not easy accurately control, transmission efficiency is low, installation centering is stringent, vibration is big；Permanent-magnet eddy current transmission belongs to
Asynchronous transmission transmits torque and revolving speed using non-contact magnetic force, and vibration isolation and damping effect is good, it can be achieved that certain soft start function,
But the starting time is short, as large-scale heavy duty soft start equipment, starts scarce capacity, and in course of normal operation, there is temperature rise, is driven
Efficiency is slightly lower；S-shaped start up curve may be implemented in CST soft start equipment in the U.S., and control precision is high, can also meet heavy load starting
Demand, but its equipment cost is expensive, maintenance cost is high, structure is more complex, it is difficult to it promotes.
Temperature rise is generated in order to solve the problem of to have slippage in permanent-magnet eddy current drive apparatus course of normal operation, 2015 years
A kind of magnetic is described in the Chinese patent CN105186830 that December 23 announced to magnetic-synchro coupler, is wrapped in technical solution
Permanent magnetic disk and permanent-magnet synchronous component are included, the permanent magnetic disk is connected with load wheel hub, the permanent-magnet synchronous component and motor wheel hub
It is connected, timing disk is equipped in permanent-magnet synchronous component, there are air gap and by magnetic-coupled between permanent magnetic disk and timing disk
Mode is coupled, without slippage between permanent magnetic disk and permanent-magnet synchronous component, without temperature rise in the course of work.But its structure is complex,
And when being applied to the starting of the heavy loads equipment such as large-scale belt conveyor, ball mill, it is easy to skid and starting is caused to fail, or
Person, due between desk permanent-magnet body air gap degree of regulation be difficult to control and cause motor overload or equipment damage.
In order to avoid skidding when starting, the temperature rise in equipment damage or motor overload problem and course of normal operation is asked
It inscribes, a kind of permanent magnetism of asynchronous starting synchronous operation is described in Chinese patent CN204928518U disclosed on December 30th, 2015
Couple soft activator, the permanent magnet coupling soft activator include coaxial arrangement input shaft, output shaft, further include wound rotor,
Output end p-m rotor and input terminal p-m rotor positioned there between, the input terminal p-m rotor, which is mounted on, drives it
On the input shaft of rotation, wound rotor is mounted on input shaft by bearing, and output end p-m rotor is fixed with the output shaft
Connection, and pass through bearing and the input axis connection；The wound rotor by coil, iron core and secured core rotor field spider structure
At input terminal p-m rotor, output end p-m rotor are made of the rotor field spider of permanent magnet and installation permanent magnet, wound rotor
The rigid connection of the rotor field spider of rotor field spider and output end p-m rotor.The technical solution combines asynchronous starting and synchronous operation
The advantages of, it can achieve the effect that preferable soft start, but flexibility is owed in its control and the control of time to starting speed
Good, the raising of transmission efficiency has biggish dependence for size, the winding data of permanent magnet, and volume is big, weight weight, because
This equipment has much room for improvement.
Summary of the invention
For the above prior art, the technical problem to be solved in the present invention is to provide a kind of permanent magnet soft starter, the permanent magnetism
Soft activator have both asynchronous starting and synchronous operation the advantages of, more specifically, its startup stage may be implemented starting the time with
The accurate control of speed, suitable for the soft start and soft stop of the large rotating inertias equipment such as large-scale belt conveyor, ball mill, and
Transmission efficiency is high, and without slippage in course of normal operation, no vortex temperature rise, structure is simple, easy for installation, vibration isolation and damping effect is good.
In order to solve the above-mentioned technical problems, the present invention provides:
A kind of permanent magnet soft starter of scheme 1., the permanent magnet soft starter include power rotor, driven rotor, executing agency
And control mechanism, the power rotor are equipped with the first permanent magnetic steel and the second permanent magnetic steel, the driven rotor is equipped with metal
Conductor and third permanent magnetic steel, first permanent magnetic steel and the metallic conductor participate in radial magnetic coupling, second permanent magnetism
Magnet steel and the third permanent magnetic steel participate in axial magnetic coupling.
The permanent magnet soft starter as described in scheme 1 of scheme 2., the executing agency can control first permanent magnetic steel with
The progressive coupling of the metallic conductor or separation, and the executing agency can control second permanent magnetic steel and the third permanent magnetism
Magnet steel coupling or separation.
Permanent magnet soft starter of the scheme 3. as described in scheme 1 or 2, the permanent magnet soft starter further include case supports part and
Bearing.
The permanent magnet soft starter as described in scheme 1 of scheme 4., the power rotor further includes flange shaft sleeve and p-m rotor
Carrier.
The permanent magnet soft starter as described in scheme 1 of scheme 5., it is characterised in that: the driven rotor further includes splined shaft
Set, driven rotor carrier, combination bearing, bearing (ball) cover, axle end baffle plate.
The permanent magnet soft starter as described in scheme 5 of scheme 6., rigidly joins between the metallic conductor and driven rotor carrier
It connects.
The permanent magnet soft starter as described in scheme 5 of scheme 7., passes through flower between the driven rotor carrier and hub splines
Key connecting.
The permanent magnet soft starter as described in scheme 7 of scheme 8., the spline connection are dynamic connection.
The permanent magnet soft starter as described in scheme 5 of scheme 9., the combination bearing couple with the driven rotor carrier.
Permanent magnet soft starter of the scheme 10. as described in scheme 5 or 9, the combination bearing include dual thrust bearing and cylinder
Roller bearing.
The permanent magnet soft starter as described in scheme 1 of scheme 11., the executing agency include servomotor, gear reducer structure, silk
Bar auxiliary structure and shift fork.
The permanent magnet soft starter as described in scheme 1 of scheme 12., the control mechanism includes rotation-speed measuring device and control
Device.
Permanent magnet soft starter of the scheme 13. as described in scheme 12, the rotation-speed measuring device include input terminal revolution speed sensing
Device, output end speed probe and signal transmission and conversion equipment.
Permanent magnet soft starter of the scheme 14. as described in scheme 13, the controller include that signal processing unit and signal are defeated
Unit out.
A kind of starting method of the permanent magnet soft starter as described in any one of scheme 1-14 of scheme 15. comprising following
Step:
Asynchronous soft start: power rotor rotation drives the magnet steel being arranged on to move, the conductor cutting on driven rotor
The magnetic line of force generates induced magnetic field, in this way, the magnet steel being set on power rotor and the metallic conductor that is set on driven rotor it
Between radial magnetic coupling, drive driven rotor rotation；By regulating and controlling coupling area between the two, Torque-adjusting transmitting makes to lead
Dynamic rotor magnetic steel is coupled with progressive between driven rotor conductor or coil, and driven rotor revolving speed moves closer to power rotor revolving speed；
Synchronous operation: when difference is smaller between driven rotor revolving speed and power rotor revolving speed and tends towards stability, fast velocity modulation
The gap between the permanent magnetic disk being set on power rotor and the permanent magnetic disk being set on driven rotor is saved, the two occurs axial
Magnetic coupling, and it is rapidly achieved synchronous operation.
In above technical scheme, by the way that two groups of permanent magnet coupling mechanism, i.e. radial permanent magnet magnet steel and metallic conductor are arranged
Asynchronous coupling, on axial power rotor the second permanent magnetic steel and on driven rotor third permanent magnetic steel synchronous coupling, realize
The effect of the soft start of asynchronous soft start synchronous operation.
Compared with prior art, the technical program have it is following prominent the utility model has the advantages that
Although 1) the technical program combines the structure of asynchronous starting and synchronous operation, structure is relatively easy, installs
Simplicity, centering flexibility are higher.
2) in the asynchronous starting stage, pass through actuating mechanism controls power rotor permanent magnetic steel and driven rotor metallic conductor
Couple speed, make its progressive coupling, so that accurately control reaches time of certain load speed, by power rotor and from
The rotation-speed measuring device being arranged at turn, can feed back to executing agency for rotary speed information in time, reach coupling speed, torque
Adjustment in time, to realize the accurate control of equipment soft-start time.
3) by detection power rotor and driven rotor two sides revolving speed, when the two rotating speed difference reaches a certain setting value,
Controller sends a signal to executing agency, so that driven rotor is with power rotor, axially coupling magnet steel participates in rapidly synchronous magnetic coupling
It closes, reaches the synchronous operation stage in very short time, this stage transmission efficiency is high, exports without slippage, without temperature rise, permanent torque, can prolong
Long service life of equipment.
4) fast first by actuating mechanism controls driven rotor magnetic coupling synchronous with the axial direction of power rotor in shutdown phase
Speed is detached from coupling, and power rotor permanent magnetic steel is coupled with driven rotor metallic conductor there are asynchronous at this time, further passes through execution
Mechanism controls participate in the area of radial asynchronous coupling, it is made to be progressively smaller until that power rotor is kept completely separate with driven rotor, this
When motor stopping, realize soft stop, while getting ready for next soft start.
5) due to load end revolving speed be it is gradual increase or decrease, not will cause motor overload or the impact to equipment
Damage, is conducive to the soft start and soft stop of the large rotating inertias equipment such as large-scale belt conveyor, ball mill.
6) simultaneously, for the soft activator compared in the prior art, vibration isolation and damping effect is obvious, and elastic buffer is good, shock resistance
Ability is strong, easy for installation, good reliability, and without temperature rise in course of normal operation, transmission efficiency is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of permanent magnet soft starter described in the embodiment of the present invention 1；
Fig. 2 is the combined bearing structure schematic diagram of permanent magnet soft starter described in the embodiment of the present invention 1；
Fig. 3 is the structural schematic diagram of permanent magnet soft starter described in the embodiment of the present invention 2.
Appended drawing reference
1- flange shaft sleeve, 2- power rotor carrier, 3- copper conductor, 4,5- power rotor magnet steel, 6- driven rotor magnet steel, 7-
Driven rotor carrier, 8- combination bearing, 9- bearing (ball) cover, 10- hub splines, 11,17- speed probes, 12- controller, 13-
Servo motor, 14- speed reducer, 15- screw pair, 16- shift fork, 18- axle end baffle plate, 81,84- thrust bearing outer rings, 82- sealing
Circle, 83- thrust bearing inner ring, 85- roller bearing inner ring, 86- cylindrical roller, 87- ball rolling element.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, below in conjunction with attached drawing and preferably
Embodiment structure and working principle of the invention is described further, but embodiment is not intended as to protection scope of the present invention
Restriction.
Embodiment 1
Permanent magnet soft starter as shown in Figure 1, including power rotor, driven rotor, executing agency and control mechanism.Actively
Rotor includes flange shaft sleeve 1, power rotor carrier 2, power rotor magnet steel 4, power rotor magnet steel 5；Driven rotor includes driven
Rotor carrier 7, copper conductor 3, combination bearing 8, bearing (ball) cover 9, hub splines 10 and axle end baffle plate 18；Executing agency includes servo
Motor 13, deceleration mechanism 14, screw pair 15, shift fork 16；Control mechanism includes input terminal speed probe 11, output end revolving speed biography
Sensor 17 and controller 12 include signal processing unit and letter in controller comprising signal transmission and conversion equipment in sensor
Number output unit.
The structural schematic diagram of combination bearing included in driven rotor as shown in Figure 2, including thrust bearing outer ring 81,
Thrust bearing outer ring 84, sealing ring 82, thrust bearing inner ring 83, roller bearing inner ring 85, cylindrical roller 86, ball rolling element 87.
Embodiment 2
Fig. 3 show the structural schematic diagram of another embodiment of the present invention, compared with the embodiment of the present invention one, is additionally arranged cabinet
Support and bearing, input terminal and output end are axis, and remaining part is constant.
Working principle of the embodiment of the present invention:
Asynchronous soft start:
Power rotor is rotated with driving end (such as motor shaft) in advance first, i.e. drive power rotor magnet steel 4 and 5 rotates, and is produced
Raw rotating excitation field measures power rotor revolving speed by the input terminal speed probe 11 in control mechanism, passes through output end revolving speed
Sensor 17 measures driven rotor revolving speed (driven rotor revolving speed is zero at this time), this rotary speed information feeds back to controller 12, controls
Device issues instruction, and the movement of control executing agency drives shift fork 16 to make 8 axially loaded of combination bearing, phase especially by screw pair 15
Driven rotor carrier 7 is pushed to make axial sliding along hub splines 10 with answering, so that copper conductor 3 and power rotor on driven rotor
On the progressive coupling of permanent magnetic steel 4, driven rotor moved up by slowly brought.By real-time measurement power rotor revolving speed and from turn
This rotary speed information is reached controller 12, and makes logic judgment by rotor speed, when power rotor revolving speed and driven rotor rotational speed difference
When value reaches the stationary value of a certain setting, control system thinks that soft start is completed, i.e., using tach signal as logic judgment according to
According to the size of control driven rotor and the progressive coupling area of power rotor, to control the time of asynchronous coupling, accurately to realize
The purpose of asynchronous soft start.After control system determines to complete asynchronous soft start, power rotor magnet steel 5 and driven rotor magnetic at this time
Air gap value needed for gap width and not up to axial coupling between steel 6, therefore torque is not transmitted between the two.
Synchronous operation:
When input terminal speed probe 11 and output end speed probe 17 detect turn of power rotor and driven rotor
When speed difference value reaches the stationary value of a certain setting, illustrate that soft start is completed in load, driven rotor revolving speed lags behind actively at this time
Rotor speed, but the rotating speed difference very little of power rotor and driven rotor.12 signal output unit of controller, which is sent a command to, to be held
Row mechanism quickly adjusts driven rotor and axially slides along spline, i.e., quickly adjusts driven rotor magnet steel 6 and power rotor magnet steel 5
Between air gap value, both make to participate in synchronous magnetic coupling in a very short period of time.Although the revolving speed of driven rotor slightly lags behind at this time
Power rotor revolving speed, but high-speed cruising, axial coupling need to only compensate and turn without overcoming driven rotor moment of inertia driven rotor
Speed difference, therefore power rotor and driven rotor can reach synchronous operation within a short period of time.Power rotor and driven rotor reach
To after synchronous operation, copper conductor 3 on driven rotor and the permanent magnetic steel 4 on power rotor are without coupling, i.e. equipment at this time
It is completely in the high efficiency synchronous operation phase.
Soft stop:
When running equipment needs to stop, controller 12 receives stop sign, passes through actuating mechanism controls driven rotor
It is detached from rapidly and couples first with axial direction (synchronous) magnetic coupling of power rotor, i.e., driven rotor magnet steel 6 and power rotor magnet steel 5 are de-
From coupling, power rotor permanent magnetic steel 4 is had an effect with asynchronous couple of driven rotor metallic conductor 3 at this time, further by holding
Row mechanism controls participate in the size of radial asynchronous coupling, it is made to be progressively smaller until that power rotor divides completely with driven rotor
From realizing soft stop, while getting ready for next soft start at this time by motor stopping.
In the embodiment above, combination bearing 8 is the combination of dual thrust bearing and cylinder roller bearing, can bear axial push away
Power and radial load.
By above embodiments, the present invention provides the technical solution that asynchronous soft start, synchronous operation and soft stop combine,
It combines the advantages of asynchronous starting and synchronous operation, is suitable for the large rotating inertias equipment such as large-scale belt conveyor, ball mill
Soft start, industrial application value with higher.
The above is merely preferred embodiments of the present invention, this does not limit the scope of protection of the present invention, this field skill
Art personnel under the premise of being detached from the principle of the present invention, done simple etc. according to the present invention by claims and summary of the invention
Effect variation and modification, all still fall within the protection scope of present patent application.
Claims (10)
1. a kind of permanent magnet soft starter, it is characterised in that: the permanent magnet soft starter includes power rotor, driven rotor, execution
Mechanism and control mechanism, the power rotor are equipped with the first permanent magnetic steel and the second permanent magnetic steel, and the driven rotor is equipped with
Metallic conductor and third permanent magnetic steel, first permanent magnetic steel and the radial magnetic coupling of metallic conductor participation, described second
Permanent magnetic steel and the third permanent magnetic steel participate in axial magnetic coupling.
2. permanent magnet soft starter as described in claim 1, it is characterised in that: the executing agency can control first permanent magnetism
The progressive coupling of magnet steel and the metallic conductor separates；The executing agency can control second permanent magnetic steel and the third
Permanent magnetic steel coupling or separation.
3. permanent magnet soft starter as claimed in claim 1 or 2, it is characterised in that: the permanent magnet soft starter further includes cabinet
Supporting element and bearing.
4. permanent magnet soft starter as described in claim 1, it is characterised in that: the power rotor further includes flange shaft sleeve and forever
Magnet rotor carrier.
5. permanent magnet soft starter as described in claim 1, it is characterised in that: the driven rotor further include hub splines, from
Turn subcarrier, combination bearing, bearing (ball) cover, axle end baffle plate.
6. permanent magnet soft starter as claimed in claim 5, it is characterised in that: in the driven rotor metallic conductor with from turn
Rigid attachment between subcarrier.
7. permanent magnet soft starter as claimed in claim 5, it is characterised in that: between the driven rotor carrier and hub splines
Coupled by spline.
8. permanent magnet soft starter as claimed in claim 7, it is characterised in that: the spline connection is dynamic connection.
9. permanent magnet soft starter as claimed in claim 5, it is characterised in that: the combination bearing and the driven rotor carrier
Connection.
10. the permanent magnet soft starter as described in claim 5 or 9, it is characterised in that: the combination bearing includes dual thrust bearing
And cylinder roller bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112635.9A CN110120735A (en) | 2018-02-05 | 2018-02-05 | A kind of permanent magnet soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112635.9A CN110120735A (en) | 2018-02-05 | 2018-02-05 | A kind of permanent magnet soft starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110120735A true CN110120735A (en) | 2019-08-13 |
Family
ID=67519845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810112635.9A Pending CN110120735A (en) | 2018-02-05 | 2018-02-05 | A kind of permanent magnet soft starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110120735A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478550A (en) * | 2020-04-01 | 2020-07-31 | 南宁学院 | Magnetic coupling |
| CN114696568A (en) * | 2022-03-29 | 2022-07-01 | 安徽理工大学 | Mixed excitation eddy current speed regulation device |
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| CN201478983U (en) * | 2009-06-22 | 2010-05-19 | 余亚莉 | Permanent magnetic coupling device of cylindrical transmission shaft |
| CN201490873U (en) * | 2009-08-11 | 2010-05-26 | 余亚莉 | Tubular permanent-magnet coupling coupler capable of adjusting permanent-magnet torques |
| CN101997394A (en) * | 2009-08-11 | 2011-03-30 | 余亚莉 | Barrel permanent magnet coupling capable of adjusting coupling space and area of air gap magnetic field |
| CN202076920U (en) * | 2011-04-27 | 2011-12-14 | 南京艾凌节能技术有限公司 | Limited-moment permanent magnetic coupling |
| CN102324829A (en) * | 2011-08-02 | 2012-01-18 | 江苏大学 | Adjustable axial asynchronous magnetic force coupler |
| CN203416146U (en) * | 2013-06-14 | 2014-01-29 | 宝鸡泰华磁机电技术研究所有限公司 | An inner-radiation-ring simple permanent magnetic shaft coupling |
| CN207868977U (en) * | 2018-02-05 | 2018-09-14 | 江苏磁谷科技股份有限公司 | A kind of permanent magnet soft starter |
-
2018
- 2018-02-05 CN CN201810112635.9A patent/CN110120735A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478983U (en) * | 2009-06-22 | 2010-05-19 | 余亚莉 | Permanent magnetic coupling device of cylindrical transmission shaft |
| CN201490873U (en) * | 2009-08-11 | 2010-05-26 | 余亚莉 | Tubular permanent-magnet coupling coupler capable of adjusting permanent-magnet torques |
| CN101997394A (en) * | 2009-08-11 | 2011-03-30 | 余亚莉 | Barrel permanent magnet coupling capable of adjusting coupling space and area of air gap magnetic field |
| CN202076920U (en) * | 2011-04-27 | 2011-12-14 | 南京艾凌节能技术有限公司 | Limited-moment permanent magnetic coupling |
| CN102324829A (en) * | 2011-08-02 | 2012-01-18 | 江苏大学 | Adjustable axial asynchronous magnetic force coupler |
| CN203416146U (en) * | 2013-06-14 | 2014-01-29 | 宝鸡泰华磁机电技术研究所有限公司 | An inner-radiation-ring simple permanent magnetic shaft coupling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478550A (en) * | 2020-04-01 | 2020-07-31 | 南宁学院 | Magnetic coupling |
| CN114696568A (en) * | 2022-03-29 | 2022-07-01 | 安徽理工大学 | Mixed excitation eddy current speed regulation device |
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