CN107086754B - A kind of composite excitation switch magnetic-linkage linear motor - Google Patents
A kind of composite excitation switch magnetic-linkage linear motor Download PDFInfo
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- CN107086754B CN107086754B CN201710210004.6A CN201710210004A CN107086754B CN 107086754 B CN107086754 B CN 107086754B CN 201710210004 A CN201710210004 A CN 201710210004A CN 107086754 B CN107086754 B CN 107086754B
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- 230000005284 excitation Effects 0.000 title claims abstract description 64
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 48
- 230000005389 magnetism Effects 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- 229910052742 iron Inorganic materials 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 210000002421 cell wall Anatomy 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 15
- 230000003447 ipsilateral effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- H02K41/033—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type with armature and magnets on one member, the other member being a flux distributor
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Linear Motors (AREA)
Abstract
The invention discloses a kind of composite excitation switch magnetic-linkage linear motors, including long stator and short mover；Short mover includes armature and magnetic pole two parts, and armature includes armature core, permanent magnetism magnetic pole and armature winding, and magnetic pole includes field core and excitation winding.Short mover is divided into two parts by motor of the present invention, side is armature, the other side is excitation pole, but the two is again mutually indepedent, it is respectively at the not ipsilateral of long stator, both the advantages of having realized magnetic flux suitching type structure, also excitation and permanent magnet and armature are effectively prevented the shortcomings that vying each other on circuit and magnetic circuit, the change magnetic field size that can be convenient simultaneously by changing the electric current of excitation winding, composite excitation is realized so as to adjust the magnetic flux of armature winding, realizes the promotion of weak magnetic output-constant operation range and the increase of overload capacity.
Description
Technical field
The invention belongs to hybrid excited linear motor technical fields, and in particular to a kind of composite excitation switch magnetic-linkage straight-line electric
Machine.
Background technique
Electric energy is directly changed into mechanical energy by linear motor, does not need intermediate running part, so as to improve transmission
Efficiency, simultaneously because not influenced by centrifugal force, theoretically speed can also be unrestricted.Straight line directly drives field in recent years
Research hotspot be permanent magnet linear synchronous motor, have many advantages, such as high pushing force density, high efficiency, high speed, high acceleration, extensively
It is general to be applied to the high performance neck such as High Speed NC Machine Tools, semiconductor machining, vertical lift transportation system, high-speed ground transport system
Domain, but its bottleneck promoted and applied is cost, because either using the structure of long armature or long permanent magnetism magnetic pole, it is whole
Body cost is all very high.
And switch flux-linkage permanent-magnetism linear motor can make permanent magnet be placed on armature-side forms short mover, have both magneto
The advantages of with switched reluctance machines, and long stator is only the core structure of salient pole type, to make cost substantially reduce, therefore in recent years
To have obtained more and more concerns.But switch flux-linkage permanent-magnetism linear motor magnetic field is difficult to adjust, and is unfavorable for the high speed of motor
Operation.Size of the mixed excitation electric machine due to can easily adjust magnetic field, so as to improve motor overload capacity and
Weak magnetic output-constant operation range.
Summary of the invention
In view of above-mentioned, the present invention is combined composite excitation with straight line switch magnetic linkage, is provided a kind of using composite excitation
The permanent magnet linear synchronous motor of switch flux-linkage has both the advantages of mixed excitation electric machine is with switch flux-linkage permanent-magnetism linear motor, thrust
Density is high, the speed of service is high, at low cost, structure is simple, applied widely, and flux control is easy.
A kind of composite excitation switch magnetic-linkage linear motor, including long stator and short mover；
The long stator is arranged in a linear by multiple adjustable magnetic iron blocks and is formed；The short mover is bilateral dissymmetrical structure, packet
Include the armature and magnetic pole for being set on mobile platform and being located at long stator two sides；The armature is dentalation, the magnetic pole
For salient pole type structure, the salient pole of armature projection portion and magnetic pole corresponds to towards long stator and possesses certain gas with long stator
Gap；
The armature includes armature core, permanent magnetism magnetic pole and armature winding, and the permanent magnetism magnetic pole is set to armature core
Armature tooth is formed between two neighboring armature slot and with two sides cell wall, the armature winding is sheathed on armature tooth；The magnetic pole
Including field core and excitation winding, the excitation winding is sheathed on the salient pole of field core to form excitation pole, when
When exciting current is 0 or does not have excitation winding, then pure permanent-magnet structure is formed.
Further, adjacent permanent magnet magnetic pole magnetizing direction on the contrary, and magnetizing direction and the short mover direction of motion keep one
It causes.
Further, the polarity of adjacent excitation pole is on the contrary, and by the polarity for changing exciting current and be sized such that
The polarity and magnetic field strength of excitation pole change, and increase magnetic or degaussing to realize.
Further, the excitation pole is identical as the number of permanent magnetism magnetic pole, and excitation pole faces armature slot.
Further, the permanent magnetism magnetic pole number differs adjustable magnetic iron block number 1~2.
Preferably, the long stator is filled out using injection non-magnet material between separated structure, that is, two neighboring adjustable magnetic iron block
It fills, the performance of motor can be increased.
Preferably, the long stator is fixed using continuous structure, that is, adjustable magnetic iron block by stay bolt, can simplify processing installation
Technique.
Further, the armature core is equipped with magnetic bridge with respect to the other side of long stator.
Further, the armature winding and excitation winding are all made of end non-overlap concentratred winding.
Further, the armature winding is half toothing or full toothing；It is when using half toothing, i.e., two neighboring
Armature winding is cased on only one armature tooth in armature tooth；When using full toothing, i.e., electricity is cased on each armature tooth
Pivot winding.
Preferably, it is equipped with fault-tolerant teeth in the armature slot, adjacent two armature coil is isolated, can reduce adjacent lines
Degree of coupling between circle is conducive to the error resilience performance for improving motor to reduce the mutual inductance between adjacent windings.
Short mover is divided into two parts by motor of the present invention, and side is armature, and the other side is excitation pole, but the two is again mutual
It is independent, the advantages of being respectively at the not ipsilateral of long stator, both realized magnetic flux suitching type structure, also effectively prevent excitation with forever
Magnet and armature on circuit and magnetic circuit the shortcomings that vying each other, while the electric current by changing excitation winding can be convenient
Change magnetic field size, realizes composite excitation so as to adjust the magnetic flux of armature winding, realize weak magnetic output-constant operation range
Promotion and the increase of overload capacity.
Therefore linear motor of the present invention has following advantageous effects:
(1) motor of the present invention excitation and permanent magnetism respectively as the side of short mover, so as to increase excitation side channel
Area improves the regulating power in magnetic field, can change the size in magnetic field by changing exciting current, be suitable for it is industrial, civilian,
Medicine etc. needs the application of the wide fast high thrust of long stroke, such as numerically-controlled machine tool, long range logistics delivery line.
(2) long stator in motor of the present invention is only made of adjustable magnetic iron block, low in cost, it is easy to accomplish production.
(3) armature in motor of the present invention and field structure are identical as common permanent-magnetism linear motor, easy to process, cost
It is low.
Detailed description of the invention
Fig. 1 is the first implementation structural schematic diagram of motor of the present invention.
Fig. 2 is the working principle and flux control schematic illustration of Fig. 1 structure.
Second of implementation structural schematic diagram of Fig. 3 motor of the present invention.
The third of Fig. 4 motor of the present invention implements structural schematic diagram.
4th kind of implementation structural schematic diagram of Fig. 5 motor of the present invention.
5th kind of implementation structural schematic diagram of Fig. 6 motor of the present invention.
Wherein: 1- long stator, 11- adjustable magnetic iron block, 12- non-magnet material, the short mover of 2-, 21- armature, 211- armature iron
Core, 212- permanent magnetism magnetic pole, 213- armature winding, 214- magnetic bridge, 215- fault-tolerant teeth, 22- magnetic pole, 221- field core, 222-
Excitation winding.
Specific embodiment
In order to more specifically describe the present invention, with reference to the accompanying drawing and specific embodiment is to technical solution of the present invention
It is described in detail.
Embodiment one:
As shown in Figure 1, the composite excitation switch magnetic-linkage linear motor of the present embodiment, including long stator 1 and short mover 2, it is short
Mover 2 includes armature 21 and magnetic pole 22, and armature 21 includes armature core 211, permanent magnetism magnetic pole 212, armature winding 213 and magnetic bridge
214, magnetic pole 22 includes field core 221 and excitation winding 222；Permanent magnetism magnetic pole 212 is alternately arranged composition, adjacent permanent magnet magnetic pole
212 magnetizing directions on the contrary, magnetizing direction is consistent with the direction of motion, all fix on a mobile platform by armature 21 and magnetic pole 22,
The two is opposing stationary, and all keeps certain gas length with long stator 1.222 sets of the excitation winding salient poles in field core 221
It is upper to form excitation pole, the polarity of adjacent excitation pole on the contrary, and the polarity by changing exciting current and size can be with
Change the polarity and magnetic field strength of excitation pole.Short mover excitation pole number is identical as permanent magnetism magnetic pole number, permanent magnetism on position
Magnetic pole is aligned with excitation slot, and long stator adjustable magnetic iron block number differs 1 or 2 with short mover permanent magnetism magnetic pole number.
Long stator 1 is made of multiple adjustable magnetic iron blocks 11, is placed on entire stroke, and part can between adjacent adjustable magnetic iron block 11
Non-magnet material 12 is filled, installation fixation is carried out by the stay bolt in adjustable magnetic iron block 11.For short mover 2, Fig. 1 dotted line frame with
Outer part is to reduce the longitudinal end effect of linear motor and increased slave part.It is end for armature portion
Assist tooth；For excitation part, to assist field pole.
The present embodiment uses the form of short mover 2, the excitation flux linkage on short mover 2, after long stator 1, into armature
In 21, with 213 intersecting chain of armature winding, it is clear that when short mover 2 is with 1 relative position difference of long stator, handed in armature winding 213
The magnetic linkage of chain is changing, and is generated in armature winding 213 close to sinusoidal counter electromotive force, and short mover 2 moves one and determines
The magnetic linkage variation of armature winding 213 is a cycle when sub- pole span, therefore three phase sine voltage is passed through in armature winding 213
Afterwards, corresponding three phase sine electric current will be generated, to generate electromagnetic push, thrust mover realizes linear motion.
Fig. 2 is the working principle of composite excitation switch magnetic-linkage linear motor in the present embodiment, wherein dashed bars with the arrow
Indicate the path of magnetic flux, and solid line with the arrow indicates the path of permanent magnet flux, it is shown that armature winding interlinkage magnetic linkage
Process；Excitation slot is aligned with permanent magnetism magnetic pole in short mover, short dynamic in first subgraph in four subgraphs of Fig. 2 from left to right
Sub- permanent magnetism magnetic pole is aligned with long stator adjustable magnetic iron block, and the magnetic linkage of permanent magnetism magnetic pole is short-circuit through adjustable magnetic iron block, at the same time adjacent excitation
The magnetic linkage of magnetic pole is also by this adjustable magnetic iron block short circuit, so that armature winding magnetic linkage is zero；As mover is mobile, magnetic linkage increases,
When mover move 1/4 times of stator poles away from when, permanent magnet flux linkage fully enters armature by adjustable magnetic iron block, interlinks, encourages with armature winding
Magnetic magnetic linkage also all and armature winding interlinkage (excitation shown in second subgraph is identical with permanent magnet flux direction, as increase magnetic state,
Otherwise it is weak magnetic state), excitation is superimposed with permanent magnet flux linkage so that the magnetic linkage of armature winding reaches maximum value；Mover continues to move
Dynamic, magnetic linkage starts to reduce, when armature tooth is fully removed long stator adjustable magnetic iron block, armature tooth be exactly in two adjustable magnetic iron blocks it
Between, that is, third subgraph is corresponded to, the magnetic linkage of permanent magnetism magnetic pole is by this two pieces of adjustable magnetic iron block short circuits, while adjacent excitation pole generates
Excitation flux linkage also by this two pieces of adjustable magnetic blocks and permanent magnet short circuit, i.e., excitation generate total magnetic linkage be 0, so armature interlink
Magnetic linkage is 0；Again as mover moves 1/4 times of stator poles away from that is, corresponding 4th subgraph, across the permanent magnet flux linkage of armature coil again
Direction is reversed, and magnetic linkage opposite direction increases, and the magnetic linkage that excitation pole generates at this time is back through armature coil, therefore armature winding
Magnetic linkage reach minimum value, it is clear that the magnetic linkage of armature winding is positive and negative alternation, essentially sinusoidal pattern, is bipolarity magnetic linkage.Fig. 2
Show increasing magnetic state, when for weak magnetic state, excitation flux linkage it is contrary.
Permanent magnetism magnetic pole is aligned with the slot of excitation side in short mover, and excitation pole and permanent magnetism magnetic pole constitute parallel magnetic circuit,
To which irreversible demagnetization will not be generated to permanent magnet.When being added when both excitation field and permanent magnetic field, in increasing magnetic state；Phase
Weak magnetic state is then in anti-situation.
Embodiment two:
Structure shown in Fig. 3 is a kind of distressed structure of embodiment one, the difference from Fig. 1 is that magnetic bridge is saved, from
And the iron core of short mover is allowed to reduce production cost using modular U-shaped structure, the disadvantage is that between adjacent permanent magnet magnetic pole
Repulsive force cause it is difficult to install.
Embodiment three:
As shown in figure 4, the present embodiment is directed to embodiment one, the long stator structure of embodiment two, main difference
Are as follows: the adjustable magnetic iron block in long stator uses continuous structure, and by being determined fixation using stay bolt in adjustable magnetic iron block, excellent
Point is simplified processing technology, and disadvantage is reduction of thrust density.
Example IV:
As shown in figure 5, the present embodiment is another distressed structure for embodiment one, main difference is that
Using half tooth armature winding.
Embodiment five:
As shown in fig. 6, the present embodiment is another distressed structure for embodiment one, held by increasing in armature slot
Side set 215 can reduce the degree of coupling between adjacent windings, to reduce the mutual inductance between adjacent windings, be conducive to improve
The error resilience performance of motor.
The above-mentioned description to embodiment is for that can understand and apply the invention convenient for 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 embodiments 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 (4)
1. a kind of composite excitation switch magnetic-linkage linear motor, including long stator and short mover；It is characterized by:
The long stator is arranged in a linear by multiple adjustable magnetic iron blocks and is formed；The short mover is bilateral dissymmetrical structure, including is set
In on mobile platform and being located at the armature and magnetic pole of long stator two sides；The armature is dentalation, and the magnetic pole is convex
The salient pole of pole formula structure, armature projection portion and magnetic pole corresponds to towards long stator and possesses certain air gap with long stator；
The armature includes armature core, permanent magnetism magnetic pole and armature winding, and it is adjacent that the permanent magnetism magnetic pole is set to armature core
Armature tooth is formed between two armature slots and with two sides cell wall, the armature winding is sheathed on armature tooth；The magnetic pole includes
Field core and excitation winding, the excitation winding are sheathed on the salient pole of field core to form excitation pole；
The excitation pole is identical as the number of permanent magnetism magnetic pole, and excitation pole faces armature slot；The permanent magnetism magnetic pole number
Differ adjustable magnetic iron block number 1~2；The long stator is non-magnetic using injecting between separated structure, that is, two neighboring adjustable magnetic iron block
Material filling；The long stator is fixed using continuous structure, that is, adjustable magnetic iron block by stay bolt；The armature core is relatively long fixed
The other side of son is equipped with magnetic bridge；Fault-tolerant teeth is equipped in the armature slot, adjacent two armature coil is isolated.
2. composite excitation switch magnetic-linkage linear motor according to claim 1, it is characterised in that: adjacent permanent magnet magnetic pole fills
Magnetic direction on the contrary, and magnetizing direction be consistent with the short mover direction of motion.
3. composite excitation switch magnetic-linkage linear motor according to claim 1, it is characterised in that: the pole of adjacent excitation pole
Property on the contrary, and by change exciting current polarity and be sized such that the polarity of excitation pole and magnetic field strength change,
Increase magnetic or degaussing to realize.
4. composite excitation switch magnetic-linkage linear motor according to claim 1, it is characterised in that: the armature winding and encourage
Magnetic winding is all made of end non-overlap concentratred winding, and armature winding is half toothing or full toothing；When using half toothing,
Armature winding is cased on only one armature tooth in i.e. two neighboring armature tooth；When using full toothing, i.e., each armature tooth
On be cased with armature winding.
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| CN201710210004.6A CN107086754B (en) | 2017-03-31 | 2017-03-31 | A kind of composite excitation switch magnetic-linkage linear motor |
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| CN107086754B true CN107086754B (en) | 2019-01-29 |
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| CN108155775B (en) * | 2018-01-19 | 2020-05-08 | 浙江大学 | Asymmetric double-side double-permanent-magnet hybrid excitation switch flux linkage linear motor |
| GB2576004B (en) | 2018-07-31 | 2022-10-05 | Trw Ltd | An electromagnetic linear actuator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437707A (en) * | 2011-12-29 | 2012-05-02 | 浙江大学 | Mechanical magnetism-adjustable type flux-switching permanent magnet linear synchronous motor |
| CN104201859A (en) * | 2014-08-28 | 2014-12-10 | 浙江大学 | Asymmetrical double-side type mixed excitation linear synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10211892A1 (en) * | 2001-03-19 | 2002-12-05 | Canon Kk | Linear stepper motor, slide device and exposure device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437707A (en) * | 2011-12-29 | 2012-05-02 | 浙江大学 | Mechanical magnetism-adjustable type flux-switching permanent magnet linear synchronous motor |
| CN104201859A (en) * | 2014-08-28 | 2014-12-10 | 浙江大学 | Asymmetrical double-side type mixed excitation linear synchronous motor |
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