CN207801591U - Surface-mount type electromagnet - Google Patents
Surface-mount type electromagnet Download PDFInfo
- Publication number
- CN207801591U CN207801591U CN201721730422.XU CN201721730422U CN207801591U CN 207801591 U CN207801591 U CN 207801591U CN 201721730422 U CN201721730422 U CN 201721730422U CN 207801591 U CN207801591 U CN 207801591U
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- China
- Prior art keywords
- rotor
- permanent magnet
- iron yoke
- stator iron
- pole
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000004907 flux Effects 0.000 description 9
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
A kind of surface-mount type electromagnet, stator iron yoke are distributed on the diagonal line of surface-mount type electromagnet there are four main pole, and pole shoe is centered on by rotor axis on the cylindrical surface of axis；Stator iron yoke has symmetrical notch among side, is used for the first control coil of coiling and the second control coil, generates control magnetic field；Front and rear cover is fixed in four corners and stator iron yoke, and front and rear cover has bearing saddle bore；It is provided with the hole of connection output shaft among rotor and is interference fit with output shaft, radially every 90 ° there are one boss on rotor, table top is distributed in the axis centered on rotor axis, and the distance in face to rotor center is the pole shoe of this four table top composition rotors on the cylindrical surface of radius；Permanent magnet is mounted on rotating pole-piece, and there are certain air gaps with stator pole shoes, and the different permanent magnet of magnetizing direction is installed on the opposite pole shoe of rotor, and to ensure that the permanent magnet magnetizing direction of adjacent pole shoe installation is different.The utility model is compact-sized, output torque is big, rotational angle is big.
Description
Technical field
The utility model belongs to the electromechanical switching mechanism of electrohydraulic servo valve in Fluid-transmission and control field, especially
It is related to surface-mount type electromagnet.
Background technology
Electro-hydraulic servo control technology is mainly used in the fields such as metallurgy, ship, aerospace and military affairs.Electrohydraulic servo valve is made
It is the core element of electrohydraulic servo-controlling system to connect the tie of system electrical part and hydraulic part, performance quality is straight
It connects the characteristic for influencing servo-drive system and function is realized.Relatively common Nozzle flapper valve and jet pipe in existing electrohydraulic servo valve
In valve, largely using torque-motor as electromechanical converter.Torque-motor converts electrical signals to mechanical movement, utilizes electricity
Magnetic principle works, and generates polarizing magnetic field by permanent magnet or magnetizing coil, electrical control signal generates control by control coil
Magnetic field, between two magnetic fields interaction generate proportional with control signal and energy reaction controlling signal polarity power or torque,
To make its motion parts generate straight-line displacement or angular displacement mechanical movement.It is divided into straight line position according to by the forms of motion of movable member
Shifting formula and angular displacement type are divided into moving-iron type and moving-coil type by the structure type of movable member.The armature of moving-iron type torque-motor is by soft
Magnetic material is made, and control coil is generally across being wound on armature, to provide control magnetic flux.The excitation mode of biasing magnetic flux has electricity to encourage
Magnetic and permanent magnet excitation, electrical excitation mode can then provide flexible and changeable biasing magnetic flux, facilitate the characteristic of torque-motor to adjust, forever
Magnetism excitation formula converter structure is compact.Working gas gap also has the diversified forms such as rectangle and annular according to different characteristic requirements.
Traditional torque-motor mostly uses greatly rectangle air gap, and the additional magnetic torque that this torque-motor generates is equivalent to one
Spring with negative spring rate makes armature further offset from middle position, is adversely affected to the steady operation of torque-motor.Cause
This, in actual use, the mechanical balance spring of motor must have rigidity allowance, to balance this magnetic spring constant.
The permanent magnet of common torque-motor is all mounted in above stator, is increased the volume of torque-motor, is led to power
The volume of square motor/power ratio increases, this is unfavorable to electrohydraulic servo-controlling system, and stator is by identical two parts group
At the requirement to processing and installation is high.The control coil of traditional torque-motor is mounted on armature, not only limits torque-motor
The angle of rotation is also unfavorable for coil heat dissipation.
Invention content
In order to overcome the shortcomings of that existing torque-motor volume is larger, output torque is smaller, rotational angle is smaller, this practicality
A kind of novel surface-mount type electromagnet compact-sized, output torque is big, rotational angle is big of offer.
Technical solution adopted by the utility model to solve its technical problems is：
A kind of surface-mount type electromagnet, including front and rear cover, rotor, stator iron yoke, output shaft, the first control coil and second
Control coil, the first permanent magnet, the second permanent magnet, third permanent magnet and the 4th permanent magnet；
There are four main poles for the stator iron yoke, and four main poles are distributed on the diagonal line of surface-mount type electromagnet, and pole
Boots are centered on by rotor axis on the cylindrical surface of axis；Stator iron yoke has symmetrical notch among side, is used for coiling
First control coil and the second control coil generate control magnetic field；
The front and rear cover is fixed in four corners and stator iron yoke, and front and rear cover has bearing saddle bore；Described
It is provided with the hole of connection output shaft among rotor, and is interference fit with output shaft, there are one convex radially every 90 ° on rotor
Platform, table top are distributed in the axis centered on rotor axis, and the distance in face to rotor center is this four table tops on the cylindrical surface of radius
Form the pole shoe of rotor；
The permanent magnet is mounted on rotating pole-piece, and there are certain air gaps with stator pole shoes, opposite in rotor
Magnetizing direction different permanent magnet is installed on pole shoe, and to ensure that the permanent magnet magnetizing direction of adjacent pole shoe installation is different.
Further, the front and rear cover is made of non-magnetic metal material, rotor and stator iron yoke high permeability
Metal soft magnetic material is made.
Further, in four pieces of permanent magnets, wherein two pieces of magnetizing directions are to be directed radially towards the center of circle, other two pieces of sides of magnetizing
To be radially away from the center of circle.
Preferably, the permanent magnet is tile.
In the bolt hole that the four corners of stator iron yoke are provided with, the front and rear cover is designed with the convex of circular ring shape in four corners
Platform coordinates with stator iron yoke.
The principles of the present invention：Magnetic field under surface-mount type electromagnet air gap consists of two parts, and a part is permanent magnet
The polarizing magnetic field of generation, another part are the excitation fields that control coil generates, the two magnetic field phase inter-modulations are to realize torque
The normal work of motor.When torque-motor no power, air-gap field is only dependent upon the polarizing magnetic field of permanent magnet, four at this time
The position relationship of rotor under magnetic pole is identical, that is, the working gas gap between the stator and rotor in each magnetic pole is identical,
Magnetic flux by four working gas gaps is identical, and rotor is in equilibrium state.When thering is electric current to flow through in control coil, generate
The polarizing magnetic field of excitation field and permanent magnet just interacts, to generate output torque.The size of torque can pass through control
The size of electric current is adjusted, and the direction of torque can also be adjusted by controlling sense of current.The maximum angle of rotation is theoretical
The upper radian for shared by each pole-face of positive and negative rotor.
The beneficial effects of the utility model are mainly manifested in：
1. the armature rotor of position in deviation can be made by adding magnetic torque caused by the biasing flux change of the utility model
It is back to middle position, it is identical as the effect of mechanical balance spring, be conducive to the stability of torque-motor work.The stator of the utility model
Iron yoke is an entirety, is conducive to processing and assembly.Permanent magnet is mounted on the rotor so that compact-sized, the volume of electromagnet
It is small, reduce volume/power ratio of electromagnet, it is easy to accomplish miniaturization.
2. the utility model uses four main poles, is conducive to increase output torque, compensates for the small disadvantage of torque, and
The distribution of four main poles is on the diagonal, so that torque-motor it is compact-sized, while can be provided more to control coil
Big space can increase control control magnetic flux, to improve torque.
3. the utility model control coil is not mounted on rotor, but external on stator.Have on stator enough
Space coiling, design can not only improve the number of turns of control coil in this way, but also the size of rotor will not be by coil
Constraint is also beneficial to coil heat dissipation, is suitble to high pressure resistant design.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic diagram for removing drive end bearing bracket of the utility model；
Fig. 3 is the drive end bearing bracket schematic diagram of the utility model, and rear end cap is identical as its structure；
Fig. 4 is the stator iron yoke structural schematic diagram of the utility model；
Fig. 5 is the first magnet structure schematic diagram of the utility model, second and third, four magnet structures it is consistent with its；
Fig. 6 is the structural schematic diagram of the rotor core of the utility model；
Fig. 7 a indicate that rotor is in the schematic diagram of the state of middle position；
Fig. 7 b indicate the schematic diagram for being passed through the state that current rotor as shown in the figure rotates counterclockwise；
Fig. 7 c indicate the schematic diagram for being passed through the state that current rotor as shown in the figure rotates clockwise.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings.
Referring to Fig.1~Fig. 7 c, a kind of surface-mount type electromagnet, including it is drive end bearing bracket 2, rear end cap 1, rotor 7, stator iron yoke 3, defeated
Shaft 6, the first control coil 9 and the second control coil 10, the first permanent magnet 4, the second permanent magnet 5, third permanent magnet the 11, the 4th
Permanent magnet 12, collar sleeve 13.
There are four main pole, four main poles to be distributed on the diagonal line of surface-mount type electromagnet for the stator iron yoke 3, and
Pole shoe is centered on by rotor axis on the cylindrical surface of axis.Stator iron yoke has symmetrical notch among side, be used for around
The first control coil 9 and the second control coil 10 are made, control magnetic field is generated.In the bolt hole that the four corners of stator iron yoke are provided with,
Influence this avoid bolt hole to magnetic circuit.
The front and rear cover 2 and 1 is designed with the boss of circular ring shape in four corners and stator iron yoke 3 coordinates so that electromagnetism
Iron compact overall structure, front and rear cover have bearing saddle bore.The hole of connection output shaft 6 is provided among the rotor, and
It is to be interference fitted with output shaft, radially every 90 ° there are one boss on rotor 7, table top is distributed in centered on rotor axis
The distance of axis, face to rotor center is the pole shoe of this four table top composition rotors on the cylindrical surface of radius.
The permanent magnet is tile, respectively the first permanent magnet 4, the second permanent magnet 5, third permanent magnet the 11, the 4th
Permanent magnet 12 is mounted on rotating pole-piece, and there are certain air gaps with stator pole shoes.It is required that the magnetizing direction of four pieces of permanent magnets
Also different, wherein two pieces of magnetizing directions are to be directed radially towards the center of circle, in addition two pieces of magnetizing directions are to be radially away from the center of circle.
Magnetizing direction different permanent magnet is installed on the opposite pole shoe of rotor, and to ensure the permanent magnet magnetizing direction of adjacent pole shoe installation
It is different.First rotating pole-piece is cleaned up when permanent magnet is installed, installed according to above-mentioned requirements and is fixed permanent magnet with AB glue.
Front and rear cover is made of non-magnetic metal material, and the soft magnetic metal of rotor and stator iron yoke high permeability
Material is made.
Rotor is in middle position：When torque-motor is in the cold original state of control coil, as shown in Figure 7a, stator
Magnetic pole and rotor magnetic pole are staggered an identical pole-face, and the working gas gap size in four magnetic poles is identical, and the magnetic of four working gas gaps
Logical identical, rotor is in the position of middle position.
Rotor rotates counterclockwise：When both sides control coil is passed through the electric current in direction as shown in Figure 7b simultaneously, magnetic pole 1 and magnetic
In the working gas gap of pole 4, by coil excitation field it is consistent with the direction of the polarizing magnetic field of permanent magnet, at this time magnetic pole extremely under
Air-gap flux will be in maximum position, and rotor rotates counterclockwise, and the size of torque, the angle of rotation can be by controlling electric current
Big minor adjustment, the extreme position of rotation is magnetic pole 1 and the position that 4 stator pole faces of magnetic pole and rotor pole faces will be staggered.Magnetic pole 2
In the working gas gap of magnetic pole 3, by coil excitation field and permanent magnet polarizing magnetic field direction on the contrary, magnetic pole at this time
Extremely descend air-gap flux by minimum position, i.e. magnetic pole 2 and magnetic pole 3 will rotate counterclockwise.
Rotor clockwise rotates：When both sides control coil is passed through electric current as shown in Figure 7 c simultaneously, magnetic pole 2 and magnetic pole 3
Working gas gap in, by coil excitation field it is consistent with the direction of the polarizing magnetic field of permanent magnet, rotor clockwise rotation,
The size of torque, the angle of rotation can be by the big minor adjustments of control electric current, and the most extreme position of rotation is magnetic pole 2 and magnetic pole
The position that 3 stator pole faces and rotor pole faces will be staggered.In the working gas gap of magnetic pole 1 and magnetic pole 4, by coil excitation
The direction of the polarizing magnetic field of magnetic field and permanent magnet on the contrary, in the working gas gap of magnetic pole 1 and magnetic pole 4, by coil excitation magnetic
With the direction of the polarizing magnetic field of permanent magnet on the contrary, magnetic pole extremely descends air-gap flux will be in the position of minimum, i.e. 2 He of magnetic pole at this time
Magnetic pole 3 will rotate clockwise.
Above-mentioned specific implementation mode is used for explaining the utility model, rather than limits the utility model, in this reality
With in novel spirit and scope of the claims, to any modifications and changes that the utility model is made, this is both fallen within
The protection domain of utility model.
Claims (5)
1. a kind of surface-mount type electromagnet, it is characterised in that：The electromagnet includes front and rear cover, rotor, stator iron yoke, output
Axis, the first control coil and the second control coil, the first permanent magnet, the second permanent magnet, third permanent magnet and the 4th permanent magnet；
There are four main poles for the stator iron yoke, and four main poles are distributed on the diagonal line of surface-mount type electromagnet, and pole shoe exists
Centered on rotor axis on the cylindrical surface of axis；Stator iron yoke has symmetrical notch among side, is used for coiling first
Control coil and the second control coil generate control magnetic field；
The front and rear cover is fixed in four corners and stator iron yoke, and front and rear cover has bearing saddle bore；The rotor
Centre is provided with the hole of connection output shaft, and is interference fit with output shaft, and radially every 90 °, there are one boss, platforms on rotor
The distance of EDS maps axis centered on by rotor axis, face to rotor center is this four table top compositions on the cylindrical surface of radius
The pole shoe of rotor；
The permanent magnet is mounted on rotating pole-piece, and there are certain air gaps with stator pole shoes, in the opposite pole shoe of rotor
The different permanent magnet of upper installation magnetizing direction, and to ensure that the permanent magnet magnetizing direction of adjacent pole shoe installation is different.
2. surface-mount type electromagnet as described in claim 1, it is characterised in that：The non-magnetic metal material of the front and rear cover
It is made, the metal soft magnetic material of rotor and stator iron yoke high permeability is made.
3. surface-mount type electromagnet as claimed in claim 1 or 2, it is characterised in that：In four pieces of permanent magnets, wherein two pieces of sides of magnetizing
To be directed radially towards the center of circle, in addition two pieces of magnetizing directions are to be radially away from the center of circle.
4. surface-mount type electromagnet as claimed in claim 1 or 2, it is characterised in that：The permanent magnet is tile.
5. surface-mount type electromagnet as claimed in claim 1 or 2, it is characterised in that：In the spiral shell that the four corners of stator iron yoke are provided with
Keyhole, the front and rear cover is designed with the boss of circular ring shape in four corners and stator iron yoke coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721730422.XU CN207801591U (en) | 2017-12-13 | 2017-12-13 | Surface-mount type electromagnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721730422.XU CN207801591U (en) | 2017-12-13 | 2017-12-13 | Surface-mount type electromagnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207801591U true CN207801591U (en) | 2018-08-31 |
Family
ID=63284005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721730422.XU Expired - Fee Related CN207801591U (en) | 2017-12-13 | 2017-12-13 | Surface-mount type electromagnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207801591U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910963A (en) * | 2017-12-13 | 2018-04-13 | 浙江工业大学 | Surface-mount type electromagnet |
-
2017
- 2017-12-13 CN CN201721730422.XU patent/CN207801591U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910963A (en) * | 2017-12-13 | 2018-04-13 | 浙江工业大学 | Surface-mount type electromagnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180831 Termination date: 20201213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |