CN108649769A - A kind of coreless permanent magnet linear synchronous motor based on Double Layer Winding structure - Google Patents
A kind of coreless permanent magnet linear synchronous motor based on Double Layer Winding structure Download PDFInfo
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- CN108649769A CN108649769A CN201810522035.XA CN201810522035A CN108649769A CN 108649769 A CN108649769 A CN 108649769A CN 201810522035 A CN201810522035 A CN 201810522035A CN 108649769 A CN108649769 A CN 108649769A
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- Prior art keywords
- permanent magnet
- linear synchronous
- synchronous motor
- winding
- double
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
Abstract
The invention discloses a kind of coreless permanent magnet linear synchronous motors based on Double Layer Winding structure, including bilateral long secondary and short primary；Long secondary is Double-edge type Halbach permanent magnet array structures, and the opposite installation of permanent magnet provides air-gap field, and short primary is made of the double-deck centralized coil encapsulation, is installed in air gap by rail plate.Motor of the present invention is not only with the intrinsic various features of coreless permanent magnet linear synchronous motor, and reduce the volume of electric motor primary, reduce the dosage of coil method, improve the winding coefficient of coil, improve the average thrust density of iron-core less motor, the advantage of concentratred winding and Distributed Winding is combined well, is suitable for Precise Position System and Precision Machining platform long lasting for operation.
Description
Technical field
The invention belongs to permanent magnetic linear synchronous motor technical fields, and in particular to a kind of iron-free based on Double Layer Winding structure
Core permanent magnetic linear synchronous motor.
Background technology
Due to the limitation of not no winding iron core, coreless permanent magnet linear synchronous motor has force oscillation low, response speed
Soon, the advantages that easy to control, therefore coreless permanent magnet linear synchronous motor is widely used in Precise Position System, including laser
In the commercial Applications such as scanning, chip manufacturing.Due to there is no winding iron core presence, air-gap field to depend mainly on the row of permanent magnet
Row, air-gap field are also easy to control.Simultaneously as iron-free cored structure causes winding magnetic field intensity weaker, coreless permanent magnet is same
The average thrust density for walking linear motor is generally small compared with the cored permanent magnetic linear synchronous motor of identical effective volume, this is in reality
Sizable inconvenience is brought in.To provide identical average thrust, generally require to increase armature supply, this can substantially increase
Add copper wastage and calorific value, corresponding motor device is caused to be difficult to adapt to long time continuous working state, while electric energy loss
Increase also reduce economic benefits.
In order to promote the average thrust density of coreless permanent magnet linear synchronous motor, existing method is broadly divided into two kinds：
One is air-gap field is enhanced by changing magnet structure, major way has to be arranged using bilateral secondary and change permanent magnet
Row form, for example, by using Halbach permanent magnet arrays, this method is limited to the promotion of air-gap field intensity, therefore to iron-core-free
The pushing force density of permanent magnetic linear synchronous motor is promoted also relatively limited.
Another method is then the structure for changing coil windings, and coreless permanent magnet is promoted to promote the method for winding coefficient
The average thrust density of linear synchronous motor.Common method is to replace centralized winding, the method using distributed winding
Though the winding coefficient of coil can be greatly improved, its end turn overlaps each other, and occupies the space of bigger.Complicated distribution
Formula winding construction is not easy to the production and installation of the coiling and primary of coil, while long end consumes more coil materials
Material, causes coil totality resistance value to increase, and copper wastage accordingly increases.
Therefore, motor space can either be saved by working out can improve the iron-core-free of motor average thrust density forever simultaneously again
Magnetic-synchro linear motor will be very valuable breakthrough and innovation.
Invention content
In view of above-mentioned, the present invention provides a kind of coreless permanent magnet linear synchronous motors based on Double Layer Winding structure, should
Motor secondary promotes air-gap field intensity as possible using double-flanged end Halbach permanent magnet arrays, and primary uses the double-deck dislocation collection
Middle winding promotes winding coefficient, wherein Double Layer Winding structure primary not only have very close distributed winding around system
Number, while possessing the simple coils end of concentratred winding formula, motor space is saved, while it is close to improve motor average thrust
Degree.
A kind of coreless permanent magnet linear synchronous motor based on Double Layer Winding structure, including iron-core-free are short primary and double
The long secondary of side structure；Include back iron and permanent magnet per length of side secondary, is fitted with along its length on the inside of the back iron more
The group permanent magnet, these permanent magnets are arranged using two-part Halbach permanent magnet arrays, i.e., a pair of vertical magnetizing direction is adjacent
The permanent magnet of a horizontal magnetizing direction is placed between permanent magnet, and is mingled between a pair of of adjacent permanent magnet of horizontal magnetizing direction
The permanent magnet of a vertical magnetizing direction；Bilateral long secondary is intermediate to stop air gap, and the short primary is set in the air gap；
The short primary creatively uses double-layer coil group, and the double-layer coil group is encapsulated by non-magnet material, often
Layer coil group is made of side by side multiple coils and upper layer and lower layer coil is interlaced fits closely；The structure can effectively improve
Winding coefficient in unit volume to improve the pushing force density of motor, while reducing power consumption, more saves primary space.
Further, the permanent magnet relative orientation on bilateral long secondary back iron, and bilateral long secondary passes through one side of back iron
Portion is connected.
Further, the double-layer coil group is formed using centralized winding, winding by copper wire or aluminum steel coiling.
Further, it is described it is short it is primary be installed in bilateral long secondary intermediate air gap by guide rail, and do along guide rail past
Linear motion.
Further, the back iron is connected and fixed by bolt and non-magnet material, constitutes the external frame of motor.
Further, the back iron uses low carbon steel plate, the permanent magnet to use NdFeB material.
Further, the long secondary uses bilateral Halbach permanent magnet arrays, can be promoted air-gap field intensity and
Sine degree.
Further, the coil in the short primary is connected by controller with external power supply.
Motor of the present invention reduces motor not only with the intrinsic various features of coreless permanent magnet linear synchronous motor
Primary volume, reduces the dosage of coil method, improves the winding coefficient of coil, combines concentratred winding well and divides
The advantage of cloth winding；There are following advantageous effects compared with prior art：
(1) the coreless permanent magnet linear synchronous motor of Double Layer Winding structure of the present invention passes through the reasonable row to primary coil
Row have obtained higher winding coefficient while the primary volume of reduction and coil materials, can be in same volume and power consumption limit
It is lower that higher pushing force density is provided.
(2) the coreless permanent magnet linear synchronous motor of Double Layer Winding structure of the present invention uses bilateral Halbach permanent magnetism battle array
Row, can provide the air-gap field of higher, more sinusoidalization.
(3) the coreless permanent magnet linear synchronous motor of Double Layer Winding structure of the present invention, magnetic pole and common permanent synchronous linear
Motor is identical, and coil is also the double-deck centralized configuration, and structure is more succinct, easy to manufacture, and cost is relatively low.
Description of the drawings
Fig. 1 is the schematic cross-section of Double Layer Winding structure coreless permanent magnet linear synchronous motor of the present invention.
Fig. 2 is the double-layer coil structural schematic diagram in motor of the present invention.
Fig. 3 is the counter electromotive force star graph of double-layer coil structure in motor of the present invention.
Fig. 4 is the model schematic of Double Layer Winding structure coreless permanent magnet linear synchronous motor of the present invention.
Fig. 5 is the distribution schematic diagram of Halbach permanent magnet array magnetic induction lines.
Fig. 6 (a) is the structural schematic diagram of common single layer concentratred winding coreless permanent magnet linear synchronous motor.
Fig. 6 (b) is the Structure Comparison figure of Double Layer Winding coreless permanent magnet linear synchronous motor of the present invention.
Fig. 7 is common iron-core-free single layer concentratred winding structural schematic diagram.
Fig. 8 is the counter electromotive force star graph of common single layer concentratred winding coreless permanent magnet linear synchronous motor.
Fig. 9 is its corresponding common single layer concentratred winding pushing force density curve under a kind of way of realization of motor of the present invention
Comparison diagram.
Specific implementation mode
In order to more specifically describe the present invention, below in conjunction with the accompanying drawings and specific implementation mode is to technical scheme of the present invention
It is described in detail.
As shown in Figure 1, the present invention is based on the coreless permanent magnet linear synchronous motor of Double Layer Winding structure, using the line of 6 poles/9
Circle collocation mode, including double secondary back irons 1 and 5, double secondary Halbach permanent magnet arrays 2 and 4 and Double Layer Winding are short by primary 3；The back of the body
Iron 1 and 5 is connected to a fixed by bolt arrangement and un-conducted magnetic material, constitutes the external frame of entire motor, is posted on back iron 1
Permanent magnet array 2, permanent magnet array 4 is posted on back iron 5, and permanent magnet arrangement uses Halbach array, magnetizing direction such as Fig. 1
Shown in middle arrow.In air gap between permanent magnet array 2 and 4, it is equipped with short by primary 3, short primary 3 are made of 9 coils,
In one layer for 4 coils it is arranged side by side, another layer be 5 coils it is arranged side by side, levels coil side is interleaved, higher around system to obtain
Number；Coil group is encapsulated by un-conducted magnetic material, is constituted iron-core-free primary, is installed in bilateral long secondary structure by guide rail
Between, linear reciprocating motion can be done along air gap direction.
As shown in Fig. 2, for it is short it is primary in the arrangement position of nine coils in space, wherein single coil 31 by copper wire or
Aluminum steel coiling forms, and 9 coils are divided into three-phase, connects per phase coil, three-phase windings are connected by controller with power supply.Such as
It is the counter electromotive force star graph of Double Layer Winding coreless permanent magnet linear synchronous motor in the case of the coil of 6 poles/9, at this time shown in Fig. 3
Winding coefficient be 0.978, noticeably greater than common centralized winding coreless permanent magnet linear synchronous motor.
The present invention shown in Fig. 4 is applied to a kind of realization method of precision positioning lathe for machining, and double secondary back irons 1 and 5 are pacified
In fixed base loaded on lathe, double secondary Halbach permanent magnet arrays 2 and 4 distinguish Surface Mounts on double secondary back irons 1 and 5, short time
Corresponding lathe processing tool, such as lathe tool and scroll chuck etc. are then installed on grade mover 3.The wherein row of permanent magnet array 2 and 4
As shown in Figure 1, it is arranged, logic replaces extension arrangement for main pole (being denoted as the poles N and the poles S) in respective array direction in cloth direction, and
Two corresponding positions of permanent magnet array, the arragement direction of main pole is identical.In this way, the magnetic field provided by main pole just can be divided
The auxiliary magnetic pole for being distributed in the air gap between two permanent magnet arrays 2 and 4, and being interspersed between main pole needs specific direction
The effect of enhancing air-gap field can be played.As shown in the magnetic induction line distribution situation of Fig. 5, if to enhance air-gap field, corresponding vehicle
The permanent magnet arragement direction of the permanent magnet array of bed should be followed successively by " upper right bottom left " form；Similarly, the permanent magnet row of permanent magnet array
Cloth direction should be followed successively by " upper lower-left is right " form.According to Fig.5, permanent magnet array arrangement in this way can not only increase between air gap
Magnetic field, and the leakage field at back iron can also be reduced, the utilization rate of permanent magnet and silicon steel sheet back iron can be improved；Meanwhile iron-core-free is dynamic
Minor structure since the magnetic field that mover coil generates is weaker, have little influence on permanent magnet generation magnetic field, motor operation, pause and
In down periods, air-gap field may be considered invariable.
Short secondary mover, which is then overlapping by nine coils as shown in Figure 2 according to double-layer structure, to be constituted, this precision positioning
Lathe motor is powered using three-phase alternating-current supply, and the split-phase mode of 9 coils is as shown in Figure 1,3 dark coils are one
Phase, 3 light coils are another phase, and three grey coils are last phase.When short primary mover is done along sliding rail between air gap
When linear uniform motion, counter electromotive force as shown in Figure 3 is will produce in several coil sides；According to coil split-phase side shown in FIG. 1
Formula, three phase back-emf vectors of the three-phase coil differ 120 ° in time, and can with the movement of short secondary mover and
It is rotated on time phase.Therefore, after corresponding three-phase alternating current being passed through inside the three-phase coil of mover, in constant air gap magnetic
Under the action of, coil can generate the horizontal thrust of constant direction and size, which pushes short primary mover to drive thereon
Lathe processing tool realizes linear motion on lathe, and winding coefficient is：
f1=cos (12 °)=0.978
After short primary mover and the lathe processing tool being fixed thereon are moved to required position, by the coil being passed through
Electric current is changed to corresponding location current under the position by three-phase alternating current, then short primary mover stop motion immediately and can position
In on the required position, that realizes motor at this time is accurately positioned control, then operates lathe processing tool again corresponding
Required operation is realized on the required position of workpiece.
The effect of the present invention is to have obtained higher winding coefficient, energy while the primary volume of reduction and coil materials
Higher pushing force density is provided under same volume and power consumption limit, the air-gap field of higher, more sinusoidalization is provided.Now by its with
Common single layer concentratred winding coreless permanent magnet linear synchronous motor is compared.The single layer that Fig. 6 (a) and Fig. 6 (b) are provided respectively
The long sub-section of winding coreless permanent magnet linear synchronous motor is identical with the Double Layer Winding motor of the present invention, and difference is only
It is the winding construction of short primary；For the fairness of comparison, be defined under identical volume, Double Layer Winding use 6 poles/
The fit system of 9 coils, single layer concentratred winding use the fit system of the coil of 7 poles/6, and primary length and volume are as schemed
Shown in be identical.Fig. 7 is the structure of the single layer concentratred winding, and Fig. 8 is the single layer concentratred winding coreless permanent magnet synchronizing direct
The counter electromotive force star graph of line motor can learn that its counter electromotive force is being divided into 6 groups by Fig. 8, in the feelings of three phase mains control
Under condition, it is bound to merge two phase back-emfs for differing 60 °, therefore its winding coefficient is：
f2=cos (30 °)=0.8660
By calculating comparison it can be found that the winding coefficient of Double Layer Winding is much larger than common single layer concentratred winding, therefore this hair
Utilization rate higher of the bright Double Layer Winding to coil.
Two motors of the structure are carried out with the emulation of pushing force density, pushing force density comparison such as Fig. 9 in one cycle
Shown, Double Layer Winding of the invention can reach 17.5N/A, and common single layer concentratred winding then only has 16.0N/A, Double Layer Winding to push away
Force density improves nearly 10% in this case compared to single layer concentratred winding.
The above-mentioned description to embodiment can be understood and applied the invention for ease of those skilled in the art.
Person skilled in the art obviously easily can make various modifications to above-described embodiment, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, the improvement made for the present invention and modification all should be in protection scope of the present invention
Within.
Claims (8)
1. a kind of coreless permanent magnet linear synchronous motor based on Double Layer Winding structure, it is characterised in that：Including the short of iron-core-free
It is primary and bilateral structure long secondary；Include back iron and permanent magnet per length of side secondary, the back iron inside is along length side
To multigroup permanent magnet is fitted with, these permanent magnets are arranged using two-part Halbach permanent magnet arrays, i.e., vertical magnetizing direction
A pair of of adjacent permanent magnet between place the permanent magnet of a horizontal magnetizing direction, and a pair of of adjacent permanent magnet of horizontal magnetizing direction
It is mingled with the permanent magnet of a vertical magnetizing direction between body；Bilateral long secondary is intermediate to stop air gap, and the short primary is arranged
In the air gap；
The short primary contains double-layer coil group, and the double-layer coil group is encapsulated by non-magnet material, every layer of coil group by
Multiple coils form side by side and upper layer and lower layer coil is interlaced fits closely.
2. coreless permanent magnet linear synchronous motor according to claim 1, it is characterised in that：On bilateral long secondary back iron
Permanent magnet relative orientation, and bilateral long secondary is connected by one side end of back iron.
3. coreless permanent magnet linear synchronous motor according to claim 1, it is characterised in that：The double-layer coil group uses
Centralized winding, winding are formed by copper wire or aluminum steel coiling.
4. coreless permanent magnet linear synchronous motor according to claim 1, it is characterised in that：The short primary passes through guide rail
It is installed in bilateral long secondary intermediate air gap, and linear reciprocating motion is done along guide rail.
5. coreless permanent magnet linear synchronous motor according to claim 1, it is characterised in that：The back iron by bolt with
Non-magnet material is connected and fixed, and constitutes the external frame of motor.
6. coreless permanent magnet linear synchronous motor according to claim 1, it is characterised in that：The back iron uses mild steel
Plate, the permanent magnet use NdFeB material.
7. coreless permanent magnet linear synchronous motor according to claim 1, it is characterised in that：The long secondary uses double
Side Halbach permanent magnet arrays can promote the intensity and sine degree of air-gap field.
8. coreless permanent magnet linear synchronous motor according to claim 1, it is characterised in that：Coil in the short primary
It is connected with external power supply by controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522035.XA CN108649769A (en) | 2018-05-28 | 2018-05-28 | A kind of coreless permanent magnet linear synchronous motor based on Double Layer Winding structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810522035.XA CN108649769A (en) | 2018-05-28 | 2018-05-28 | A kind of coreless permanent magnet linear synchronous motor based on Double Layer Winding structure |
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| CN201810522035.XA Pending CN108649769A (en) | 2018-05-28 | 2018-05-28 | A kind of coreless permanent magnet linear synchronous motor based on Double Layer Winding structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462320A (en) * | 2018-11-02 | 2019-03-12 | 安徽大学 | The double-deck reversed dip winding coreless permanent magnet linear synchronous motor |
| CN111030341A (en) * | 2019-12-19 | 2020-04-17 | 北京哈尔贝克科技有限公司 | Low-power-consumption high-speed double-coil magnetic steel brushless direct current motor |
| CN111327174A (en) * | 2020-03-17 | 2020-06-23 | 中国科学院电工研究所 | Coreless long stator permanent magnet linear synchronous motor |
| CN111769713A (en) * | 2020-07-21 | 2020-10-13 | 西安工业大学 | Coreless cylindrical permanent magnet synchronous linear motor |
| CN111934508A (en) * | 2020-08-11 | 2020-11-13 | 哈尔滨工业大学 | Radial magnetic field coreless permanent magnet synchronous motor |
| CN111953108A (en) * | 2020-08-11 | 2020-11-17 | 哈尔滨工业大学 | Non-overlapping winding coreless linear permanent magnet synchronous motor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462320A (en) * | 2018-11-02 | 2019-03-12 | 安徽大学 | The double-deck reversed dip winding coreless permanent magnet linear synchronous motor |
| CN111030341A (en) * | 2019-12-19 | 2020-04-17 | 北京哈尔贝克科技有限公司 | Low-power-consumption high-speed double-coil magnetic steel brushless direct current motor |
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| CN111769713A (en) * | 2020-07-21 | 2020-10-13 | 西安工业大学 | Coreless cylindrical permanent magnet synchronous linear motor |
| CN111934508A (en) * | 2020-08-11 | 2020-11-13 | 哈尔滨工业大学 | Radial magnetic field coreless permanent magnet synchronous motor |
| CN111953108A (en) * | 2020-08-11 | 2020-11-17 | 哈尔滨工业大学 | Non-overlapping winding coreless linear permanent magnet synchronous motor |
| CN111934508B (en) * | 2020-08-11 | 2022-11-29 | 哈尔滨工业大学 | Radial magnetic field coreless permanent magnet synchronous motor |
| CN111953108B (en) * | 2020-08-11 | 2022-11-29 | 哈尔滨工业大学 | Non-overlapping winding coreless linear permanent magnet synchronous motor |
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