CN209088784U - A kind of ironless linear motors - Google Patents
A kind of ironless linear motors Download PDFInfo
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- CN209088784U CN209088784U CN201821960432.7U CN201821960432U CN209088784U CN 209088784 U CN209088784 U CN 209088784U CN 201821960432 U CN201821960432 U CN 201821960432U CN 209088784 U CN209088784 U CN 209088784U
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- magnet
- back iron
- magnet unit
- permanent magnet
- symmetrical
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Abstract
The utility model relates to a kind of ironless linear motors, including stator, stator includes top back iron and lower part back iron, Nd-Fe-B permanent magnet is respectively arranged on top back iron and lower part back iron medial surface, Nd-Fe-B permanent magnet is connected in order by multiple magnet units along the arrangement of rail length direction and is constituted, magnet unit is isosceles trapezoid, and bottom is located next to the bottom of neighboring magnet units in adjacent magnet unit, and the angle that magnetizes of magnet unit successively changes 90 degree；Magnet unit on two Nd-Fe-B permanent magnets is symmetrical arranged relatively, and the horizontal magnetizing direction of the magnet unit symmetrical along center line is on the contrary, identical along the vertical magnetizing direction of the symmetrical magnet unit of center line.The utility model changes the shape and magnetizing direction of traditional rectangular Nd-Fe-B permanent magnet, rectangular permanent magnet isosceles trapezoidal structure has been changing into, effect improves the amplitude and sinusoidal pattern of ironless linear motors air-gap field, and simplifies complex angles and magnetize the complexity of lower technique.
Description
Technical field
The utility model belongs to electromechanical engineering technical field, is related to a kind of ironless linear motors.
Background technique
Linear motor is divided into cored and iron-core less motor, and cored linear motor is intended to because slot effect has it
Reluctance position is inclined to and the detent force of generation, and detent force is to the quick positioning of the motion platform using linear motor driving and precision
Generate adverse effect.Wish that detent force is the smaller the better in high speed, high-precision motion platform, therefore frequently with ironless linear motors
As its driving.
The usual structure of ironless linear motors are as follows: including linear motor stator electric, the linear motor stator electric is by including logical
The top back iron and lower part back iron for crossing the connection of U-type groove link block, are provided with neodymium iron boron on the inside of top back iron and lower part back iron
Permanent magnet module, Nd-Fe-B permanent magnet adhere to together with back iron.Nd-Fe-B permanent magnetic shape is rectangle, is on identical back iron
Adjacent rectangle permanent magnet between there are the gap of certain distance, adjacent permanent magnet magnetizes angulation change 180 degree.Upper and lower two neodymiums
It is air gap between iron boron permanent magnet module, mover coil is set in air gap.Ironless linear motors mover coil is not
It is to be wound on the tooth socket of iron core, but directly adopt epoxy resin directly for coil encapsulating.Though ironless linear motors do not have in this way
There is Slot force bring force oscillation, but lack the magnet accumulating cap of iron core, therefore the thrust generated is smaller.The prior art is usually adopted
Increase the thrust of iron-core less motor with the mode of coil windings parallel connection, but increase mover length and weight, in fixation
Linear motion platform length under, too long linear motor rotor can reduce its effective positioning stroke.In order to overcome the problem,
For the prior art by the way of Optimize magnetic circult, the magnetizing direction by changing permanent magnet carries out magnetic field optimization.At one of motor
In pole span, magnetized with the direction of sine wave to permanent magnet.But in actual production operation, the technology of magnetizing is difficult to accurately
Angle is carried out to magnetize, existing repulsion force is bigger to each other for the smaller adjacent permanent magnet of angle change, cause it is difficult to install,
Practical operation is difficult to realize.Therefore the thrust of ironless linear motors is improved by optimization linear motor zero load air gap magnetic density waveform
And reduce its force oscillation, but minimize the complexity for assembling technique again, at current problem to be solved.
Summary of the invention
The purpose of the utility model is to provide the ironless linear motors under a kind of field structure array, to overcome existing skill
Thrust existing for art is smaller, and effective positioning stroke is short and assembles the big problem of difficulty of processing.
In order to reach the purpose of this utility model, the technical solution adopted in the utility model is:
A kind of ironless linear motors, including stator, the stator include top back iron and lower part back iron, top back iron and
Nd-Fe-B permanent magnet is respectively arranged on the back iron medial surface of lower part, the Nd-Fe-B permanent magnet is arranged by multiple along rail length direction
Composition is connected in order in the magnet unit of column, and magnet unit is isosceles trapezoid, and bottom is located next to adjacent magnets in adjacent magnet unit
The angle that magnetizes of the bottom of unit, magnet unit successively changes 90 degree；Magnet unit on two Nd-Fe-B permanent magnets is opposite
It is symmetrical arranged, the horizontal magnetizing direction of the magnet unit symmetrical along center line is on the contrary, the magnet list symmetrical along center line
First vertical magnetizing direction is identical.
Further, above-mentioned isosceles trapezoid inferior horn angle change is in 45 degree of -53 degree range.
Compared with prior art, the utility model has the advantages that:
1, the utility model changes the shape and magnetizing direction of traditional rectangular Nd-Fe-B permanent magnet, and rectangular permanent magnet is become
It is melted into isosceles trapezoidal structure, and also no longer there are the gap of fixed range between adjacent permanent magnet, but close-packed arrays.In this way
So that permanent magnet need not consider the deviation of fixed position when installing, it is only necessary to by adjacent permanent magnet close-packed arrays, but also electric
The stator structure of machine is more compact.The magnetizing direction that this novel magnetic pole structure array is changed with 90 degree replaces traditional 180 degree variation
Magnetizing direction, magnetizing direction is very easy to realize on an original direction more than only, technique.
2, the utility model effectively increases the amplitude and sinusoidal pattern of ironless linear motors air-gap field, and simplifies
Complex angles magnetize the complexity of lower technique.
Detailed description of the invention
Fig. 1 is the utility model structure diagram；
Fig. 2-Fig. 4 is differentiation schematic diagram of the rectangular configuration to the utility model structure；
Fig. 5 is permanent magnet array module diagram；
Fig. 6 is magnetic field strength figure.
1- stator in figure, 2- magnet unit, the top 3- back iron, the lower part 4- back iron, 5-U type groove link block, 6- sunk screw.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
Referring to Fig. 1, the utility model provides a kind of ironless linear motors, including stator 1, top back iron 3 and lower part back
Iron 4, top back iron 3 and lower part back iron 4 are connected to form symmetrical bilateral U-shaped structure using sunk screw 6 and U-type groove link block 5.
Bonding is provided with Nd-Fe-B permanent magnet respectively on 4 medial surface of described top back iron 3 and lower part back iron.The neodymium iron boron
Permanent magnet is connected in order by multiple magnet units 2 along the arrangement of rail length direction and is constituted, and magnet unit 2 is isosceles trapezoid, this
Isosceles trapezoid inferior horn angle change bottom on 45-53 degree, adjacent magnet unit 2 is located next to neighboring magnet units 2 in embodiment
Bottom.The angle that magnetizes of described magnet unit 2 successively changes 90 degree, the magnetic field side of two groups of adjacent in this way trapezoidal magnet units
To vertical, the magnetic direction of two groups of alternate trapezoidal magnet units is opposite in same trapezoidal magnet array.
Magnet unit 2 on two Nd-Fe-B permanent magnets is symmetrical arranged relatively, the magnet list symmetrical along center line
First 2 horizontal magnetizing directions are on the contrary, identical along the symmetrical vertical magnetizing direction of magnet unit 2 of center line.
In the utility model, shape that the magnet unit 2 of Nd-Fe-B permanent magnet uses is constituted as isosceles trapezoidal structure, isosceles
Trapezoidal inferior horn angle change is in 45 degree of -53 degree range.On the top back iron 3 or lower part back iron 4 of stator 1, isosceles trapezoid
The Nd-Fe-B permanent magnet of shape is connect using a kind of alternating expression Boulez mode with back iron, and bottom is by adjacent isosceles ladder in isosceles trapezoid
Shape bottom, and adjacent permanent magnet is closely packed together, no longer there are gaps.It is connected with the top back iron 3 of Nd-Fe-B permanent magnet and connects
It is connected in 4 structure of lower part back iron of Nd-Fe-B permanent magnet along air gap center line mirror symmetry.2 magnetizing direction of magnet unit presses 90 degree
Angle successively changes, and magnetizing direction changes 4 times in a pole span.The magnet unit 2 that horizontal direction magnetizes is along air gap center line pair
2 magnetizing direction of other side magnet unit be also referred to as horizontal direction, the Nd-Fe-B permanent magnet that vertical direction magnetizes is along air gap center
Symmetrical other side Nd-Fe-B permanent magnet magnetizing direction is also vertical direction.The neodymium iron boron symmetrical along air gap center line is forever
The horizontal magnetizing direction of magnet is opposite.The vertical magnetizing direction of the Nd-Fe-B permanent magnet symmetrical along air gap center line is identical.
- Fig. 4 referring to fig. 2, in the utility model, magnet unit 2 is no longer using the side of magnetizing of traditional 180 degree angle change
Formula, but use the mode that magnetizes of 90 degree of direction changes as shown in Figure 2, using the magnet of such shape, each piece of isosceles ladder
Shape permanent magnet is equivalent to the superposition of three pieces of rectangular shapes, 45 degree of magnetizing direction magnets
There are the permanent magnet of 45 degree of magnetizing directions in the array of 45 degree of magnetizing directions of rectangular permanent magnet variation, this direction is magnetized
Magnet can regard being superimposed for the following direction x and the direction y direction as；
Rectangular permanent magnet array may be partitioned into many fritters, repartition, the rectangular permanent magnet fritter of 45 degree of magnetizing directions
According to its direction, it is transformed into being superimposed for the corresponding direction x magnetizing direction triangle fritter and the direction y magnetizing direction triangle fritter,
The identical fritter of magnetizing direction is considered as same permanent magnet, i.e. two pieces of triangle fritters and one piece of rectangular tiles are considered as one, such as
This can produce array of magnetic dipoles structure proposed in the utility model, this trapezoidal array structure gas compared with conventional radial array
Gap magnetic field amplitude is improved with sine, reduces work again compared with the permanent magnet array of 45 degree of magnetizing directions of rectangular shape
Skill and the difficulty assembled, one piece of trapezoidal magnet are equivalent to the superposition of three pieces of rectangular shapes, 45 degree of magnetizing direction arrays.
Referring to Fig. 6, in use, mover is set between two Nd-Fe-B permanent magnets, winding is in magnetic fields after energization
Lower generation faraday electromagnetic induction phenomenon, mover move.It can be obtained by calculated result, array side provided by the utility model
Formula improves air gap magnetic density waveform amplitude and sine compared with traditional array, can achieve and magnetizes close to 45 degree of rectangular shape
The level of direction change array.
Claims (2)
1. a kind of ironless linear motors, including stator (1), it is characterised in that: the stator (1) include top back iron (3) and
Nd-Fe-B permanent magnet, the neodymium iron boron are respectively arranged on lower part back iron (4), top back iron (3) and lower part back iron (4) medial surface
Permanent magnet is connected in order by multiple magnet units (2) along the arrangement of rail length direction and is constituted, and magnet unit (2) is isosceles ladder
Shape, bottom is located next to the bottom of neighboring magnet units (2) in adjacent magnet unit (2), and magnet unit (2) magnetizes angle successively
Change 90 degree；Magnet unit (2) on two Nd-Fe-B permanent magnets is symmetrical arranged relatively, the magnet symmetrical along center line
Unit (2) horizontal magnetizing direction is on the contrary, identical along the vertical magnetizing direction of the symmetrical magnet unit of center line (2).
2. ironless linear motors according to claim 1, it is characterised in that: the isosceles trapezoid inferior horn angle change is 45
In -53 degree range of degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821960432.7U CN209088784U (en) | 2018-11-27 | 2018-11-27 | A kind of ironless linear motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821960432.7U CN209088784U (en) | 2018-11-27 | 2018-11-27 | A kind of ironless linear motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209088784U true CN209088784U (en) | 2019-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821960432.7U Expired - Fee Related CN209088784U (en) | 2018-11-27 | 2018-11-27 | A kind of ironless linear motors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209088784U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111669025A (en) * | 2020-06-30 | 2020-09-15 | 西安工业大学 | double-V-shaped coreless permanent magnet synchronous linear motor |
| CN112039309A (en) * | 2020-10-04 | 2020-12-04 | 西安航天动力测控技术研究所 | Voice coil motor magnetic circuit structure |
| WO2022257293A1 (en) * | 2021-06-07 | 2022-12-15 | 苏州赛得尔智能科技有限公司 | Flux-concentrating type permanent magnet motor having u-shaped structure |
-
2018
- 2018-11-27 CN CN201821960432.7U patent/CN209088784U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111669025A (en) * | 2020-06-30 | 2020-09-15 | 西安工业大学 | double-V-shaped coreless permanent magnet synchronous linear motor |
| CN112039309A (en) * | 2020-10-04 | 2020-12-04 | 西安航天动力测控技术研究所 | Voice coil motor magnetic circuit structure |
| WO2022257293A1 (en) * | 2021-06-07 | 2022-12-15 | 苏州赛得尔智能科技有限公司 | Flux-concentrating type permanent magnet motor having u-shaped structure |
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| 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: 20190709 Termination date: 20211127 |