CN107896045A - Magnetic pole tooth punching formula torque-motor - Google Patents
Magnetic pole tooth punching formula torque-motor Download PDFInfo
- Publication number
- CN107896045A CN107896045A CN201711327216.9A CN201711327216A CN107896045A CN 107896045 A CN107896045 A CN 107896045A CN 201711327216 A CN201711327216 A CN 201711327216A CN 107896045 A CN107896045 A CN 107896045A
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- China
- Prior art keywords
- magnetic pole
- motor
- stator
- iron yoke
- torque
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
There are two main poles in the stator iron yoke of a kind of magnetic pole tooth punching formula torque-motor, left stator and right stator, symmetrical breach is had among every piece of stator iron yoke side, for the control coil of coiling first and the second control coil；The notch that left and right stator iron yoke is provided with certain depth is used for supporting the first permanent magnet and the second permanent magnet；Four main poles are respectively along the teeth groove for being axially provided with five formed objects, and tooth top is all using armature connecting shaft as axle center, and the distance of tooth top to axle center is on the face of cylinder of radius；The hole of connection connecting rod of armature is provided among rotor, radially there is a boss on stator every 90 °, and the tooth of five formed objects is provided with each boss, stator iron yoke and rotor stagger different teeth when assembling, and form the magnetic circuit of closing and the Double-directional rotary of rotor different angle.The present invention be advantageous to torque-motor work stability, and can improve torque-motor the linearity, operating when stationarity.
Description
Technical field
The invention belongs to the electromechanical switching mechanism of electrohydraulic servo valve in Fluid-transmission and control field, more particularly to
Linear low-angle torque-motor.
Background technology
Electro-hydraulic servo control technology is mainly used in the fields such as metallurgy, ship, Aero-Space and military affairs.Electrohydraulic servo valve is made
It is the core parts of electrohydraulic servo-controlling system to connect the tie of system electrical part and hydraulic part, its performance quality is straight
Connect the characteristic for influenceing 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 produces polarizing magnetic field by permanent magnet or magnetizing coil, electrical control signal produces control by control coil
Magnetic field, the interphase interaction generation in two magnetic fields it is proportional to control signal and can reaction controlling signal polarity power or torque,
So that its motion parts produces straight-line displacement or angular displacement mechanical movement.It is divided into straight line position according to by the forms of motion of movable piece
Shifting formula and angular displacement type, it is divided into moving-iron type and moving-coil type by the structure type of movable piece.The armature of moving-iron type torque-motor is by soft
Magnetic material is made, and control coil is typically across being wound on armature, to provide control magnetic flux.The excitation mode of biasing magnetic flux has electrical excitation
And permanent magnet excitation, electrical excitation mode can then provide flexible and changeable biasing magnetic flux, facilitate the characteristic of torque-motor to adjust, permanent magnetism
Excitation-type torque-motor is compact-sized.Working gas gap also has the diversified forms such as rectangle and annular according to different characteristic requirements.
Electromagnet output torque can be divided into two parts, and a part is electromagnetic torque caused by control coil electric current, and another part is rank
After iron rotor deviates middle position, bias and magnetic torque is added caused by flux change.Traditional torque-motor uses rectangle gas mostly
Gap, additional magnetic torque caused by this torque-motor have the spring of negative spring rate equivalent to one, make armature further inclined
From middle position, the steady operation of torque-motor is adversely affected.In actual use, therefore, the mechanical balance spring of motor
There must be rigidity allowance, to balance this magnetic spring constant.
The content of the invention
In order to overcome the existing torque-motor linearity not high, work the shortcomings of not steady enough, the invention provides one kind to exist
The permanent magnetism swinging torque-motor of tooth punching on stator and rotor, it is using the magnetic spring constant in main pole tooth punching, torque-motor
Just, biasing additional magnetic torque caused by flux change can make the armature rotor of deviation middle position be back to middle position, with mechanical balance
The effect of spring is identical, when being advantageous to the stability that torque-motor works, and can improve the linearity of torque-motor, operating
Stationarity.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of magnetic pole tooth punching formula torque-motor, including drive end bearing bracket, rear end cap, rotor, output shaft, the first control coil and
Two control coils, left stator and right stator；
There are two main poles in the left stator and the stator iron yoke of right stator, one shares four main poles, is respectively
First magnetic pole, the second magnetic pole, the 3rd magnetic pole and the 4th magnetic pole；Symmetrical breach is had among every piece of stator iron yoke side,
For the control coil of coiling first and the second control coil；The notch that left and right stator iron yoke is provided with certain depth is used for supporting first
Permanent magnet and the second permanent magnet；
Four main poles are respectively along the teeth groove for being axially provided with five formed objects, and all tooth tops are all with armature connecting shaft
For axle center, the distance of tooth top to axle center is on the face of cylinder of radius；
The two poles of the earth of first permanent magnet and the two poles of the earth of the second permanent magnet are pull-in in the two pieces of stator iron yokes in left and right respectively, are led to respectively
Cross left and right magnetic pole and form polarizing magnetic field up and down；
The hole of connection connecting rod of armature is provided among the rotor, and is to be interference fitted with connecting rod of armature, edge on stator
Radially there is a boss every 90 °, and the tooth of five formed objects is provided with each boss, when stator iron yoke and rotor assemble
Stagger different teeth, forms the magnetic circuit of closing and the Double-directional rotary of rotor different angle.
Further, four seamed edges of left and right stator iron yoke axially are respectively equipped with the breach of arc, and front and rear cover is four
Four pin are made at angle respectively, are engaged with four arc notch seamed edges of left and right stator iron yoke.
Further, the upper and lower ledge of end cap is used for positioning the first permanent magnet and the second permanent magnet, front and rear cover difference
It is provided with bearing saddle bore.
Further, front and rear cover is made of non-magnetic metal material, and armature and left and right iron yoke high permeability
Metal soft magnetic material is made.
Preferably, four tops of left and right stator iron yoke are provided with symmetrical bolt hole.
The principle of the present invention：Magnetic field under torque-motor electromagnet air gap is made up of two parts, and a part is permanent magnet production
Raw polarizing magnetic field, another part are excitation fields caused by control coil, and the two magnetic field phase inter-modulations are to realize electromagnet
Normal work.When electromagnet no power, its air-gap field is only dependent upon the polarizing magnetic field of permanent magnet, now under four magnetic poles
Rotor tooth position relationship it is identical, be all 1/4 tooth pitch that staggers, as shown in Figure 7a.When thering is electric current to flow through in control coil
When, the polarizing magnetic field of its caused excitation field and permanent magnet just interacts, so as to produce output torque.This electromagnet is any
Angle between the big pole axis line of two adjacent stators is 90 °, the mechanical angle corresponding to each rotor slot-pitch (360 ° of electrical angles)
Spend for 7.2 °, and when the one big pole axis line of stator coincides with rotor pinion, the axle of adjacent big pole and rotor tooth just staggers
1/2 angular pitch.
In order to improve the size of torque-motor output torque, the present invention uses four main poles, is advantageous to increase power output
Square, compensate for two magnetic poles torque it is small the shortcomings that, and the distribution of four main poles is on the diagonal, so that torque-motor
It is compact-sized, while bigger space can be provided to control coil, control control magnetic flux can be increased, so as to improve power
Square.
Beneficial effects of the present invention are mainly manifested in：
1. the present invention is just, produced by biasing flux change using the magnetic spring constant in main pole tooth punching, torque-motor
Additional magnetic torque the armature rotor of deviation middle position can be made to be back to middle position, it is identical with the effect of mechanical balance spring, be advantageous to
Torque-motor work stability, and can improve torque-motor the linearity, operating when stationarity.
2. the present invention use four main poles, be advantageous to increase output torque, compensate for small scarce of torque of two magnetic poles
Point, and the distribution of four main poles is on the diagonal, so that torque-motor it is compact-sized, while control coil can be given
Bigger space is provided, control control magnetic flux can be increased, so as to improve torque.
3. control coil of the present invention is not mounted within rotor, but external on stator.There are enough spaces on stator
Coiling, so design can not only improve the number of turn of control coil, and the size of rotor will not be constrained by coil,
Coil radiating is also beneficial to, is adapted to high pressure resistant design.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the sectional view of the present invention；
Fig. 3 is the drive end bearing bracket schematic diagram of the present invention, and rear end cap is identical with its structure；
Fig. 4 is the magnetic steel structure schematic diagram of the present invention；
Fig. 5 is the left stator iron yoke structural representation of the present invention, and right stator iron yoke is identical with its structure；
Fig. 6 is the structural representation of the rotor core of the present invention；
Fig. 7 is the schematic diagram of the present invention, and wherein 7a represents the state of rotor middle position, and Fig. 7 b represent that rotor is counterclockwise by middle position
1/4 tooth pitch is rotated, Fig. 7 c represent that rotor is turned clockwise 1/4 tooth pitch by middle position.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
1~Fig. 7 of reference picture, a kind of magnetic pole tooth punching formula torque-motor, including drive end bearing bracket 2, rear end cap 1, rotor 7, output shaft
6th, the first permanent magnet 5, the second permanent magnet 8, the first control coil 9 and the second control coil 10, left stator 4, right stator 3, collar
Sleeve 11；
Described stator is made up of two pieces of left and right stator iron yoke 4 and 3, there is two main poles in every piece of stator iron yoke, altogether
There are four main poles, respectively the first magnetic pole, the second magnetic pole, the 3rd magnetic pole, the 4th magnetic pole.Divide among every piece of stator iron yoke side
Symmetrical breach is not provided with, for coiling the first control coil 9 and the second control coil 10, produces control magnetic field, left and right stator
Symmetrical bolt hole is provided with the corner of iron yoke, this avoid influence of the bolt hole to magnetic circuit, left and right stator iron yoke is provided with one
The notch of depthkeeping degree is used for supporting the first permanent magnet and the second permanent magnet；Four main poles are identical respectively along being axially provided with five
The teeth groove of size, all tooth tops are all using armature connecting shaft as axle center, and the distance of tooth top to axle center is on the face of cylinder of radius.
The first described permanent magnet 5 and the two poles of the earth of the second permanent magnet 8 are pull-in in the two pieces of stator iron yokes in left and right respectively, permanent magnetism
Body needs to ensure that polarity is consistent when installing, and forms polarizing magnetic field up and down by left and right magnetic pole respectively；
Described front and rear cover 2 and 1 separately designs projection at corner, with four arc-shaped slots of left and right stator iron yoke
Seamed edge is engaged, can not only fixed stator, and make the compact-sized of magnetic pole tooth punching formula torque-motor.The upper and lower protrusion of end cap
Part is used for positioning the first permanent magnet 5 and the second permanent magnet 8, and front and rear cover has bearing saddle bore；
The hole of connection output shaft 6 is provided among described rotor 7, and is to be interference fitted with output shaft, the shaft shoulder of output shaft
Being interacted with collar sleeve 11 prevents the axial jump of rotor, radially has a boss every 90 ° on rotor, and each
Can stagger different teeth when the tooth of five formed objects, stator iron yoke and rotor assembling are provided with boss, form the magnetic of closing
Road and the Double-directional rotary of rotor different angle；
Front and rear cover is made of non-magnetic metal material, and the soft magnetic metal of armature and left and right iron yoke high permeability
Material is made.
According to the difference of application scenario, the control mode of electromagnet can be step-by-step movement, subdivision step-by-step movement so continuously with
Track controls formula.The operation principle of electromagnet is illustrated by taking step motion control as an example below.
Rotor is in the position of middle position：As shown in Figure 7a, when electromagnet is in the cold original state of control coil,
The working gas gap of opposing polarities is identical, four big pole extremely under tooth and rotor tooth be all 1/4 angular pitch that staggers.
Rotor rotate counterclockwise：When both sides, control coil is passed through the electric current in direction as shown in Figure 7b, now, the He of magnetic pole 1
It is consistent with the direction of the polarizing magnetic field of permanent magnet by the excitation field of coil in the working gas gap of magnetic pole 4, now magnetic pole extremely under
Air-gap flux will increase, i.e. the big pole axis line of magnetic pole 1 and 4 coincides with rotor pinion；In the working gas gap of magnetic pole 2 and magnetic pole 3,
The excitation field of the coil passed through and the polarizing magnetic field of permanent magnet it is in opposite direction, now magnetic pole extremely descends air-gap flux to reduce,
That is the big pole axis line of magnetic pole 2 and 3 and rotor pinion staggers 1/2 angular pitch.
Rotor rotate counterclockwise：When both sides control coil is passed through the electric current as shown in Fig. 7 c directions simultaneously, magnetic pole 2 and magnetic
In the working gas gap of pole 3, the excitation field of the coil passed through is consistent with the direction of the polarizing magnetic field of permanent magnet, now magnetic pole extremely under
Air-gap permeance will be located to increase, i.e. the big pole axis line of magnetic pole 2 and 3 coincides with rotor pinion；The working gas gap of magnetic pole 1 and magnetic pole 4
In, the excitation field of the coil passed through and the polarizing magnetic field of permanent magnet it is in opposite direction, now magnetic pole extremely descends air-gap permeance to subtract
Small, i.e. the big pole axis line of magnetic pole 1 and 4 and rotor pinion staggers 1/2 angular pitch.
Rotor returns to middle position：When the coil is de-energized, magnetic field is controlled to disappear, rotor returns to middle position in the presence of polarizing magnetic field
Position.
In summary, when both sides coil electricity mode：The lateral coil of two lateral coil no powers → two is passed through direction shown in Fig. 7 b
The lateral coil of the lateral coil no power of electric current → two → two be passed through the lateral coil no power of the electric current in direction shown in Fig. 7 c → two, it is this to follow
The mode that ring is powered can make electromagnet on initial position with 1.8 ° it is suitable, ceaselessly swing back and forth counterclockwise.
Above-mentioned embodiment is used for explaining the present invention, rather than limits the invention, in the spirit of the present invention
In scope of the claims, to any modifications and changes of the invention made, protection scope of the present invention is both fallen within.
Claims (5)
- A kind of 1. magnetic pole tooth punching formula torque-motor, it is characterised in that：The torque-motor includes drive end bearing bracket, rear end cap, rotor, defeated Shaft, the first control coil and the second control coil, left stator and right stator；There are two main poles in the left stator and the stator iron yoke of right stator, one shares four main poles, and respectively first Magnetic pole, the second magnetic pole, the 3rd magnetic pole and the 4th magnetic pole；Symmetrical breach is had among every piece of stator iron yoke side, is used for The control coil of coiling first and the second control coil；The notch that left and right stator iron yoke is provided with certain depth is used for supporting the first permanent magnetism Body and the second permanent magnet；Four main poles are respectively along the teeth groove for being axially provided with five formed objects, and all tooth tops are all using armature connecting shaft as axle The heart, the distance of tooth top to axle center is on the face of cylinder of radius；The two poles of the earth of first permanent magnet and the two poles of the earth of the second permanent magnet are pull-in in the two pieces of stator iron yokes in left and right respectively, pass through a left side respectively Right magnetic pole forms polarizing magnetic field up and down；The hole of connection connecting rod of armature is provided among the rotor, and is to be interference fitted with connecting rod of armature, on stator radially There is a boss every 90 °, and the tooth of five formed objects is provided with each boss, stator iron yoke and rotor stagger when assembling Different teeth, form the magnetic circuit of closing and the Double-directional rotary of rotor different angle.
- 2. magnetic pole tooth punching formula torque-motor as claimed in claim 1, it is characterised in that：Left and right stator iron yoke axially four Individual seamed edge is respectively equipped with the breach of arc, and front and rear cover makes four pin respectively at corner, with four arcs of left and right stator iron yoke V notch v seamed edge is engaged.
- 3. magnetic pole tooth punching formula torque-motor as claimed in claim 1 or 2, it is characterised in that：The upper and lower ledge of end cap is used for The first permanent magnet and the second permanent magnet are positioned, front and rear cover has bearing saddle bore.
- 4. magnetic pole tooth punching formula torque-motor as claimed in claim 1 or 2, it is characterised in that：The non-magnetic gold of front and rear cover Category material is made, and armature and left and right iron yoke are made of the metal soft magnetic material of high permeability.
- 5. magnetic pole tooth punching formula torque-motor as claimed in claim 1 or 2, it is characterised in that：Four tops of left and right stator iron yoke Portion is provided with symmetrical bolt hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711327216.9A CN107896045A (en) | 2017-12-13 | 2017-12-13 | Magnetic pole tooth punching formula torque-motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711327216.9A CN107896045A (en) | 2017-12-13 | 2017-12-13 | Magnetic pole tooth punching formula torque-motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107896045A true CN107896045A (en) | 2018-04-10 |
Family
ID=61807804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711327216.9A Pending CN107896045A (en) | 2017-12-13 | 2017-12-13 | Magnetic pole tooth punching formula torque-motor |
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| Country | Link |
|---|---|
| CN (1) | CN107896045A (en) |
Cited By (3)
| 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 |
| CN111490659A (en) * | 2019-01-25 | 2020-08-04 | 浙江工业大学 | Symmetric permanent magnet type unidirectional proportional electromagnet based on air gap compensation |
| CN111490658A (en) * | 2019-01-25 | 2020-08-04 | 浙江工业大学 | Bidirectional rotary torque motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2298615Y (en) * | 1997-04-15 | 1998-11-25 | 徐惠国 | Pole shoe close jointed oscillating motor |
| CN2682727Y (en) * | 2003-12-16 | 2005-03-02 | 上海安乃达驱动技术有限公司 | Quadrupole outer corner torque motor |
| CN103078463A (en) * | 2012-12-24 | 2013-05-01 | 广州日滨科技发展有限公司 | Axial magnetizing permanent magnet motor |
| CN204835883U (en) * | 2015-08-20 | 2015-12-02 | 许万超 | Multiple utility vibrating motor |
| CN207853720U (en) * | 2017-12-13 | 2018-09-11 | 浙江工业大学 | Magnetic pole tooth punching formula torque-motor |
-
2017
- 2017-12-13 CN CN201711327216.9A patent/CN107896045A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2298615Y (en) * | 1997-04-15 | 1998-11-25 | 徐惠国 | Pole shoe close jointed oscillating motor |
| CN2682727Y (en) * | 2003-12-16 | 2005-03-02 | 上海安乃达驱动技术有限公司 | Quadrupole outer corner torque motor |
| CN103078463A (en) * | 2012-12-24 | 2013-05-01 | 广州日滨科技发展有限公司 | Axial magnetizing permanent magnet motor |
| CN204835883U (en) * | 2015-08-20 | 2015-12-02 | 许万超 | Multiple utility vibrating motor |
| CN207853720U (en) * | 2017-12-13 | 2018-09-11 | 浙江工业大学 | Magnetic pole tooth punching formula torque-motor |
Cited By (3)
| 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 |
| CN111490659A (en) * | 2019-01-25 | 2020-08-04 | 浙江工业大学 | Symmetric permanent magnet type unidirectional proportional electromagnet based on air gap compensation |
| CN111490658A (en) * | 2019-01-25 | 2020-08-04 | 浙江工业大学 | Bidirectional rotary torque motor |
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