CN209562358U - Two-way electromechanical converter - Google Patents
Two-way electromechanical converter Download PDFInfo
- Publication number
- CN209562358U CN209562358U CN201920128148.1U CN201920128148U CN209562358U CN 209562358 U CN209562358 U CN 209562358U CN 201920128148 U CN201920128148 U CN 201920128148U CN 209562358 U CN209562358 U CN 209562358U
- Authority
- CN
- China
- Prior art keywords
- stator
- rotor
- tooth
- magnetic pole
- gap
- 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.)
- Expired - Fee Related
Links
- 230000004907 flux Effects 0.000 claims abstract description 19
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 22
- 229910052742 iron Inorganic materials 0.000 abstract 11
- 238000009827 uniform distribution Methods 0.000 abstract 1
- 210000000515 tooth Anatomy 0.000 description 27
- 238000010586 diagram Methods 0.000 description 13
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000005284 excitation Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241000345998 Calamus manan Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Two-way electromechanical converter is equipped with rotor, output shaft in stator；Stator yoke iron hoop circumference uniform distribution magnetic pole of the stator；Control coil is set between first stator yoke iron and the second stator yoke iron；It is equipped between second stator yoke iron and third stator yoke iron every magnetic patch and is placed with permanent magnet, form biasing magnetic flux；Rotor is evenly distributed rotor magnetic pole, and radially air gap, rotor magnetic pole side and magnetic pole of the stator form axial air-gap with stator pole group；The end face of the magnetic pole of the stator of first stator yoke iron and the second stator yoke iron includes the flank of tooth and rectangular surfaces, and rectangular surfaces are located in one end of the flank of tooth, forms axial air-gap with the side of rotor magnetic pole；The positions of the rectangular surfaces of the position of the rectangular surfaces of the rotor magnetic pole of first stator yoke iron and the second stator yoke iron is on the contrary, make axial air-gap be symmetrically distributed in the two sides of rotor magnetic pole；The second stator yoke iron angle opposite with rotor tooth offset with the stator tooth of the first stator yoke iron.
Description
Technical field
The utility model relates to a kind of electromechanical converters.
Background technique
Rotary valve is a kind of relative position for changing spool, valve pocket using rotary motion, changes the flow path inside rotary valve, most
The reversal valve of flow path opening and closing or commutation is realized eventually.Rotary valve can be by manual, machine driving or directly by motor, motor and rotation
Solenoid actuated, to realize accurate servo/ratio control.Compared with slide valve or cone valve, rotary valve has high reliablity, structure letter
The advantages that list, working frequency are high, oil resistant liquid pollution capacity is strong can be widely applied to high-speed switch, high speed exciting, high speed and commutate
In hydraulic system, especially when the throttling slot number of spool valve pocket is more, single-stage rotary valve can obtain also bigger than multiple valve spools
Metered flow.However in existing electro-hydraulic servo/ratio control system, it is extensive that the application of rotary valve but can not show a candle to slide valve.It canvasses
Its reason, first is that the throttling channel of rotary valve/window processing is complex, second is that being used to drive the rotating electromagnet of rotary valve to obtain ratio control
Much more difficult than direct action type proportional electromagnet of characteristic processed, the latter is by using a magnetism-isolating loop structure, and magnetic circuit is in magnetism-isolating loop when excitation
Punishment is two-way axially and radially, the required horizontal throw-thrust performance of ratio control can be obtained after synthesis, although magnetic conduction
The welding of set is relatively complicated, but is not what big problem for high-volume automated production, and rotating electromagnet is often
Design is specifically optimized to stator tooth and rotor tooth shape could obtain relatively flat torque-corner characteristic, this is with regard to big
Its practical application is limited greatly.
For the promotion and application rotary valve in electro-hydraulic servo/ratio system, Magnetic circuit topologies knot of the people in rotating electromagnet
Numerous studies have been done in structure and torque angle displacement characteristic optimization.Widely applied torque is obtained in Nozzle flapper valve and jet pipe servo valve
Motor can also obtain the position control characteristic of ratio by the rational design to elastic element, but since its magnetic circuit is based on axis
To air gap, it is difficult to obtain biggish operating angle.AM General detect company Montagu propose based on radial working gas gap
Modified torque-motor expand its Work-corner range further, and itself have positive ELECTROMAGNETIC STIFFNESS, Ke Yi
Proportional positions control characteristic is obtained in the case where not additional elastic element.In order to obtain flat torque angle displacement characteristic curve, Hitachi is public
Permanent magnetism shape on designed moving-magnetic type torque-motor rotor has been made special designing by the Fumio of department, and pole-face is radially cut
It is fluted and insert non-magnet material, adjoint torque pulsation when compensating rotor rotation with this.Japanese denso company into
The magneto torque-motor of two youth of rattan design, two magnetic poles being made of discrete permanent magnet are non-in a manner of differing half of magnetic pole angle
It is arranged symmetrically in the outside of shaft, the torque pulsation as caused by polygon magnetic pole periphery is compensated with this, to obtain steady
Torque-corner characteristic.The electrical excitation torque-motor of the developments such as Zhejiang University Zhang Guangqiong, to the shape of magnetic pole of the stator and rotor pole faces
Shape has carried out special designing, changes the torque angle displacement characteristic of motor by the magnetic flux degree of saturation at control stator magnet tip of pole shoe.Cui
Sword et al. proposes a kind of moving-magnetic type rotational rate electromagnet based on radial working gas gap, based on differential magnetic circuit and has positive electricity
Magnetic rigidity, but structure is complex, is unfavorable for industrial applications and large-scale serial production.
Summary of the invention
In order to overcome the disadvantages mentioned above of the prior art, the utility model provide it is a kind of it is based on hybrid air gap, there is water
The simply two-way electromechanical converter of flat torque-corner characteristic, structure.
The basic principle of the utility model is as follows: common working gas gap has radial air gap and axis in electromechanical converter
To two kinds of air gap, radial air gap can have biggish Work-corner, but with the increase of error angle (rotor is gradually aligned), defeated
Torque can reduce out, i.e., its torque angle displacement characteristic slope of a curve is negative；And axial air-gap working range is relatively narrow, but output torque with
The increase of error angle and increase, i.e., its torque angle displacement characteristic slope of a curve is positive.Therefore, the working gas gap of the utility model is divided into two
Part, groundwork air gap are radial air gap, increase an axial air-gap on the basis of radial air gap.Radial air gap and axial direction
The torque phase inter-modulation that air gap generates, is obtained with close to horizontal torque angle displacement characteristic curve, outside by reasonable parameter optimization
Add the position control characteristic that ratio is obtained with after reduction torsion spring.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
Two-way electromechanical converter, the front and back side of stator are separately installed with drive end bearing bracket 2, rear end cap 9, are equipped in stator
Rotor 4 is equipped with output shaft 1 on rotor 4.The stator by sequence arranged in co-axial alignment the first stator 3, the second stator 5 and third
Stator 7 forms, every piece of N number of stator tooth of track ring even circumferential distribution, each stator tooth formation magnetic pole of the stator 31, on each stator
Magnetic pole of the stator 31 is axially aligned, and is conducive to increase output torque.First stator 3 and the second stator 5 are provided with pair along interface respectively
The groove of title, split form annular groove 32, place control coil 10 in annular groove 32, form control magnetic flux.Second stator, 5 He
It is equipped between third stator 7 every magnetic patch 6 and is placed with permanent magnet, form biasing magnetic flux.
Rotor 4 is radially even to be distributed with N number of rotor tooth, forms N number of rotor magnetic pole, and the end face of each rotor magnetic pole is all
Arc-shaped surface forms radial air gap with magnetic pole of the stator 31.Circular arc annular surface end and magnetic pole of the stator form axial air-gap.
The end face of the magnetic pole of the stator 31 of first stator 3 and the second stator 5 includes circumferential arc-shaped flank of tooth 31a and side elevation
The end of 31b, the flank of tooth and rotor magnetic pole forms radial air gap；Side elevation 31b is located in one end of flank of tooth 31a, with rotor magnetic pole
Side form axial air-gap；The side elevation 31b of the rotor magnetic pole of first stator 3 is located at one end of flank of tooth 31a, the second stator 5
The side elevation 31b of magnetic pole of the stator be located at the other end of flank of tooth 31a, so that axial air-gap is symmetrically distributed in the two sides of rotor magnetic pole；
To enable electromagnet to work normally, need to change the mode of each section of yoke axial direction side set, i.e. the second stator 5
Tooth needs one angle of Advancing Rotor tooth along clockwise direction, and the tooth of the first stator 3 then falls behind rotor tooth phase along clockwise direction
Same angle.
Rotor 4 uses drag cup structure, reduces rotary inertia, is conducive to increase response speed.The drive end bearing bracket 2, rear end
It lid 9, output shaft 1 and is made every magnetic patch 6 of non-magnetic metal material, and rotor 4, the first stator 3, the second stator 5 and third
The metal soft magnetic material of the high permeability of stator 7 is made.
Preferably, 8 magnetic pole of the stator of the first stator 3 and the distribution of 5 ring even circumferential of the second stator, each magnetic pole of the stator phase
Every 45 °, rotor 4 is radially even to be distributed with 8 rotor tooths, and rotor tooth form is at rotor magnetic pole.
Preferably, the stator tooth of the second stator 5 needs 1/4 angular pitch of Advancing Rotor tooth along clockwise direction, and first is fixed
The stator tooth of son 3 then falls behind 1/4 angular pitch of rotor tooth along clockwise direction.
The beneficial effects of the utility model are mainly manifested in:
1. obtaining horizontal torque-corner characteristic using hybrid working gas gap.The working gas gap of the utility model is divided into
Two parts, groundwork air gap are radial air gap, increase an axial air-gap on the basis of radial air gap.Radial air gap and axis
The torque phase inter-modulation generated to air gap, is obtained with by reasonable parameter optimization close to horizontal torque angle displacement characteristic curve,
The position control characteristic of ratio is obtained with after additional reduction torsion spring.
2. fast response time, output torque are big.It is columnar structured compared to other rotary-type ratio electromagnet rotors,
Its rotor of scheme provided by the utility model is drag cup structure, and rotary inertia is small, help to obtain higher dynamic response speed
Degree.It is designed using more field structures, is conducive to promote output torque.
3. using unicoil excitation, control is simple.Compared to two-phase excitation structure, drive is can be effectively reduced in unicoil excitation
The complexity of dynamic circuit, controls more simple.
4. permanent magnet is added in axial magnetic circuit, air-gap flux is increased, when work of electromagnet, permanent magnet is formed inclined
The control magnetic flux phase inter-modulation that magnetic flux and magnet exciting coil are formed is set, is conducive to increase output torque.
5. structure is simple, at low cost.Compared to other rotary-type ratio electromagnets, scheme zero provided by the utility model
Number of components is few, and processing, assembly are relatively easy to, and manufacturing cost is low, is conducive to industrialized practical application and extensive batch
Amount production.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model.
Fig. 2 is the assembling schematic diagram of the utility model；
Fig. 3 is the rotor structure schematic diagram of the utility model；
Fig. 4 is the drive end bearing bracket structural schematic diagram of the utility model；
Fig. 5, Fig. 7 and Fig. 9 are the structural schematic diagrams of the stator of the utility model；
Fig. 6 is the rotor structure schematic diagram of the utility model；
Fig. 8 is the structural schematic diagram every magnetic patch of the utility model；
Figure 10 is the magnet structure schematic diagram of the utility model；
Figure 11 is the rear end cover structure schematic diagram of the utility model；
Figure 12 is radial air gap, axial air-gap and the torque angle displacement characteristic curve synoptic diagram for mixing air gap；
Figure 13 is the principle schematic diagram of the utility model；
Figure 14 is the operation principle schematic diagram of the utility model, and control coil is passed through forward current at this time；
Figure 15 is the operation principle schematic diagram of the utility model, and control coil is passed through reverse current at this time.
Specific embodiment
The utility model is described further with reference to the accompanying drawing.
Referring to Fig.1~Figure 11,
Two-way electromechanical converter, the front and back side of stator are separately installed with drive end bearing bracket 2, rear end cap 9, are equipped in stator
Rotor 4 is equipped with output shaft 1 on rotor 4.The stator by sequence arranged in co-axial alignment the first stator 3, the second stator 5 and third
Stator 7 forms, and every piece of track ring even circumferential is distributed 8 stator tooths, and each stator tooth forms magnetic pole of the stator 31, each stator magnet
Pole is separated by 45 °, and the magnetic pole of the stator 31 on each stator is axially aligned, and is conducive to increase output torque.First stator 3 and the second stator
5 are provided with symmetrical groove along interface respectively, and split forms annular groove 32, places control coil 10 in annular groove 32, form control
Magnetic flux processed.It is equipped between second stator 5 and third stator 7 every magnetic patch 6 and is placed with permanent magnet, form biasing magnetic flux.
Rotor 4 is radially even to be distributed with 8 rotor tooths, forms 8 rotor magnetic poles, the end face of each rotor magnetic pole is all
Arc-shaped surface forms radial air gap with magnetic pole of the stator 31.Circular arc annular surface end and magnetic pole of the stator form axial air-gap.
The end face of the magnetic pole of the stator 31 of first stator 3 and the second stator 5 includes circumferential arc-shaped flank of tooth 31a and side elevation
The end of 31b, flank of tooth 31a and rotor magnetic pole forms radial air gap；Side elevation 31b is located at one end of flank of tooth 31a, with rotor magnetic pole
Side form axial air-gap；The side elevation 31b of the rotor magnetic pole of first stator 3 is located at one end of flank of tooth 31a, the second stator 5
The side elevation 31b of magnetic pole of the stator be located at the other end of flank of tooth 31a, so that axial air-gap is symmetrically distributed in the two sides of rotor magnetic pole；
To enable electromagnet to work normally, need to change the mode of each section of yoke axial direction side set, i.e. the second stator 5
Tooth needs 1/4 angular pitch of Advancing Rotor tooth along clockwise direction, and the tooth of the first stator 3 then falls behind rotor tooth along clockwise direction
1/4 angular pitch.
Rotor 4 uses drag cup structure, reduces rotary inertia, is conducive to increase response speed.The drive end bearing bracket 2, rear end
It lid 9, output shaft 1 and is made every magnetic patch 6 of non-magnetic metal material, and rotor 4, the first stator 3, the second stator 5 and third
The metal soft magnetic material of the high permeability of stator 7 is made.
As shown in figure 13, when 10 no power of control coil, air-gap flux is only dependent upon the biasing magnetic flux of permanent magnet 8,
Rotor positional relationship at this time under three magnetic poles of electromagnet is identical, i.e., magnetic pole of the stator is identical as respective rotor tooth offset angular
Arc surface, the radial air gap in four magnetic poles is identical with axial air-gap size, and rotor 4 is in the initial position of middle position.
When control coil 10 is passed through forward current as shown in figure 14, working gas gap g1 is biased the influence in magnetic field, gas
Gap magnetic flux remains unchanged.Working gas gap g3 is influenced by excitation field, and air-gap flux increases.Working gas gap g2, lower control coil
Excitation field it is identical as the bias magnetic field direction of permanent magnet 8 and be overlapped mutually, air-gap flux increases, and rotor 4 is by electromagnetic force
The effect of square rotates clockwise, the torque phase inter-modulation that radial air gap and axial air-gap respectively generate at this time, so that electromagnet obtains
The torque angle displacement characteristic of almost horizontal is obtained, the size of output torque can make by the big minor adjustment of control electric current, cooperation Hookean spring
Used time can obtain the position control effect proportional to electric current.
When control coil 10 is passed through reverse current as shown in figure 15, working gas gap g1 is biased the influence in magnetic field, gas
Gap magnetic flux remains unchanged.Working gas gap g3 is influenced by excitation field, and air-gap flux increases.Under working gas gap g2, control coil
Excitation field it is contrary with the bias magnetic field of permanent magnet 8 and cancel out each other, air-gap flux reduces, and rotor 4 is by electromagnetic force
Square effect rotation counterclockwise, the torque phase inter-modulation that radial air gap and axial air-gap respectively generate at this time, so that electromagnet obtains
The size of the torque angle displacement characteristic of almost horizontal, output torque can be used by the big minor adjustment of control electric current, cooperation Hookean spring
When can obtain the position control effect proportional to electric current.
Content described in this specification embodiment is only an enumeration of the implementation forms of the utility model concept, this is practical new
The protection scope of type should not be construed as being limited to the specific forms stated in the embodiments, the protection scope of the utility model also and
In those skilled in the art according to the utility model design it is conceivable that equivalent technologies mean.
Claims (4)
1. two-way electromechanical converter, the front and back side of stator is separately installed with drive end bearing bracket (2), rear end cap (9), installation in stator
Have rotor (4), output shaft (1) is housed on rotor (4), it is characterised in that: the stator is determined by the first of sequence arranged in co-axial alignment
Sub (3), the second stator (5) and third stator (7) composition, every piece of track ring even circumferential are distributed N number of stator tooth, each stator tooth
It is formed magnetic pole of the stator (31), the magnetic pole of the stator (31) on each stator is axially aligned, and is conducive to increase output torque；First stator
(3) and the second stator (5) is provided with symmetrical groove along interface respectively, and split forms annular groove (32), puts in annular groove (32)
It sets control coil (10), forms control magnetic flux；It is equipped between second stator (5) and third stator (7) every magnetic patch (6) and is placed with
Permanent magnet forms biasing magnetic flux；
Rotor (4) is radially even to be distributed with N number of rotor tooth, forms N number of rotor magnetic pole, and the end face of each rotor magnetic pole is all round
Arcwall face forms radial air gap with magnetic pole of the stator (31)；Circular arc annular surface end and magnetic pole of the stator form axial air-gap；
The end face of the magnetic pole of the stator (31) of first stator (3) and the second stator (5) includes the circumferential arc-shaped flank of tooth (31a) and side
The end of facade (31b), the flank of tooth (31a) and rotor magnetic pole forms radial air gap；Side elevation (31b) is located in the flank of tooth (31a)
One end forms axial air-gap with the side of rotor magnetic pole；The side elevation (31b) of the rotor magnetic pole of first stator (3) is located at the flank of tooth
The one end of (31a), the side elevation (31b) of the magnetic pole of the stator of the second stator (5) are located at the other end of the flank of tooth (31a), make axial gas
Gap is symmetrically distributed in the two sides of rotor magnetic pole；
One angle of Advancing Rotor tooth, the tooth of stator (3) then fall behind along clockwise direction and turn the tooth of stator (5) along clockwise direction
The identical angle of sub- tooth.
2. two-way electromechanical converter as described in claim 1, it is characterised in that: rotor (4) uses drag cup structure；Before
It end cap (2), rear end cap (9), output shaft (1) and is made every magnetic patch (6) of non-magnetic metal material, rotor (4), the first stator
(3), the second stator (5) and third stator (7) are made of the metal soft magnetic material of high permeability.
3. two-way electromechanical converter as described in claim 1, it is characterised in that: the first stator (3) and the second stator (5)
8 magnetic pole of the stator of ring even circumferential distribution, each magnetic pole of the stator are separated by 45 °, and rotor (4) is radially even to be distributed with 8 turns
Sub- tooth, rotor tooth form is at rotor magnetic pole.
4. two-way electromechanical converter as described in claim 1, it is characterised in that: the stator tooth of the second stator (5) needs edge
1/4 angular pitch of clockwise direction Advancing Rotor tooth, the stator tooth of the first stator (3) then fall behind rotor tooth 1/ along clockwise direction
4 angular pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920128148.1U CN209562358U (en) | 2019-01-25 | 2019-01-25 | Two-way electromechanical converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920128148.1U CN209562358U (en) | 2019-01-25 | 2019-01-25 | Two-way electromechanical converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209562358U true CN209562358U (en) | 2019-10-29 |
Family
ID=68307631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920128148.1U Expired - Fee Related CN209562358U (en) | 2019-01-25 | 2019-01-25 | Two-way electromechanical converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209562358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490657A (en) * | 2019-01-25 | 2020-08-04 | 浙江工业大学 | Bidirectional electromechanical converter |
-
2019
- 2019-01-25 CN CN201920128148.1U patent/CN209562358U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490657A (en) * | 2019-01-25 | 2020-08-04 | 浙江工业大学 | Bidirectional electromechanical converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2865079B1 (en) | Variable magnetic flux-type rotary electric machine | |
| CN101056027B (en) | Non symmetrical interleaving mixed exciting synchronization motor | |
| CN108336837A (en) | A kind of composite excitation direct driving motor | |
| CN209709911U (en) | The unidirectional proportion electro-magnet of symmetrical magneto based on air-gap compensation | |
| CN209562358U (en) | Two-way electromechanical converter | |
| CN201466930U (en) | Rotary electromagnet used for digital valve | |
| CN209562362U (en) | Bidirectional rotary type torque-motor | |
| CN201018373Y (en) | Mixed field excitation synchronous motor | |
| CN209562357U (en) | Electromechanical converter | |
| CN209562366U (en) | Single-phase rotational rate electromagnet based on hybrid air gap | |
| CN207801712U (en) | Great-moment ring air gap permanent magnet formula torque-motor | |
| CN111490660A (en) | Single-phase rotary proportional electromagnet based on mixed air gap | |
| CN111490659A (en) | Symmetric permanent magnet type unidirectional proportional electromagnet based on air gap compensation | |
| CN111490657A (en) | Bidirectional electromechanical converter | |
| JP2009065803A (en) | Magnet synchronous machine | |
| CN113036962B (en) | Low-cost lightweight alternating-pole permanent magnet motor | |
| CN114157063A (en) | Asymmetric permanent magnet auxiliary synchronous reluctance motor | |
| CN201650914U (en) | Two-directional rotation-type high-speed switching electromagnet with high pressure resistance | |
| CN210397891U (en) | Electrically excited bidirectional rotary electromagnet with horizontal moment-corner characteristic | |
| WO2018076477A1 (en) | Motor | |
| CN207801591U (en) | Surface-mount type electromagnet | |
| CN207853720U (en) | Magnetic pole tooth punching formula torque-motor | |
| CN113612362A (en) | Composite alternating pole permanent magnet vernier motor | |
| CN108649764B (en) | Three-degree-of-freedom bearingless permanent magnet motor with constant current source excitation | |
| CN111490658A (en) | Bidirectional rotary torque motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191029 |