CN103633810B - A kind of flux-reversal hybrid excited linear motor of cutting orientation magnetizing - Google Patents
A kind of flux-reversal hybrid excited linear motor of cutting orientation magnetizing Download PDFInfo
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- CN103633810B CN103633810B CN201310584972.5A CN201310584972A CN103633810B CN 103633810 B CN103633810 B CN 103633810B CN 201310584972 A CN201310584972 A CN 201310584972A CN 103633810 B CN103633810 B CN 103633810B
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Abstract
The invention discloses the flux-reversal hybrid excited linear motor of a kind of cutting orientation magnetizing, including primary mover and secondary stator, described primary mover is formed by connecting side by side by primary module, described primary mover and secondary stator are made by permeability magnetic material, the salient-pole structure of the facewidth such as described secondary stator is, it is air gap between described primary mover and secondary stator, described primary module is respectively provided on two sides with two armature tooths, it is provided with an excitation tooth between two described armature tooths, it is wound with a set of armature winding on described each armature tooth, it is wound with set of excitation winding on described each excitation tooth, the end of described armature tooth is pasted with the permanent magnet of two pieces of opposite polarity cutting orientation magnetizings.Reduce the risk of permanent magnet generation irreversible demagnetization, improve the reliability of motor.Solve the problem that narrow and small magnetic conduction bridge is easily saturated.Improve the fault freedom of motor.It is suitable for needing the application scenario of variable-speed operation on a large scale.
Description
Technical field
The present invention relates to a kind of magnetic flux reverse motor, the flux-reversal of a kind of cutting orientation magnetizing
Hybrid excited linear motor.
Background technology
In needs Linear transmission occasion, linear electric motors have higher transmission compared to electric rotating machine
Efficiency, it is possible to promote the performance of whole system.Especially in wheel track traffic system, linear electric motors
The advantage such as have that climbing capacity is strong, circuit applicability is strong, construction costs is low and noise is low.Now,
The linear electric motors of induction type are applied in various countries' urban track traffic.But, sensing
Motor excitation loss is big, power factor is low.Compared to induction machine, permanent-magnetism linear motor power energy
Index is high, efficiency is high, power factor is high.For traditional permanent-magnetism linear motor, nothing
Opinion is along track laying by winding or permanent magnet, along with the increase of track length, the system of motor
Cause this also will sharply increase.
Flux-reversal linear machine is different from traditional permanent-magnetism linear motor, its permanent magnet and around
Group is all located in short primary.And length secondary is only pressed into by cheap silicon steel sheet stack, very
It is suitable for carrying out the laying of long line along track.But after motor is made, air-gap field is difficult to regulate,
And then bring Constant-power speed range little, and the problem of weak magnetic speed-up difficulty, it is unfavorable for the tune of train
Speed.Additionally, when motor is short-circuited fault also cannot demagnetization, may result in failure propagation,
It is unfavorable for the safe operation of train.
Mixed excitation electric machine combines the advantage of magneto and electro-magnetic motor, at magneto
Add Exciting Windings for Transverse Differential Protection on the basis of structure, can easily air-gap field be adjusted, thus
Expand the speed adjustable range of motor.China authorize patent of invention CN200910035497.X and
CN201210083874.9 individually discloses a kind of composite excitation type magnetic flux reverse motor, original
The most do not make the biggest change on permanent magnet flux reverse motor architecture basics, remain permanent magnet flux
The compact simple structure of reverse motor, Exciting Windings for Transverse Differential Protection is not take up slot space, it is not necessary to additionally increase
The volume of motor, but, owing to magnetic flux needs through permanent magnet, therefore, regulate magnetic field
Inefficient.China authorize patent of invention CN201320123623.9 and
CN201110097982.7 discloses a kind of rotor sectional type mixed excited magnetic pass reverse motor,
Magnetic conduction bridge is all left on permanent magnet both sides, and therefore, motor adjustable magnetic performance is improved.Segmented
Rotor structure also improve the fault freedom of motor.But, the width of magnetic conduction bridge is the narrowest and small,
It is easily saturated, constrains the adjustable magnetic ability of motor.The rotor of segmented is also given and is manufactured processing and peace
Dress makes troubles.Additionally, in above electric machine structure, the magnetizing direction of permanent magnet is radially,
The magnetic potential being passed through electric current generation with armature, Exciting Windings for Transverse Differential Protection is serially connected, and permanent magnet is susceptible to not
Reversible demagnetization, makes motor break down.
Summary of the invention
For problems of the prior art, it is an object of the invention to provide one and tangentially fill
The flux-reversal hybrid excited linear motor of magnetic, uses the permanent magnet of cutting orientation magnetizing, its side of magnetizing
It is in parallel to armature, Exciting Windings for Transverse Differential Protection magnetic potential, it is not easy to occurring under curent change impacts can not
Inverse demagnetization.The magnetic flux that Exciting Windings for Transverse Differential Protection produces needs not move through the permanent magnet that magnetic resistance is the biggest, therefore carries
The high adjustable magnetic efficiency of motor.Armature tooth acted in effect as the function of magnetic conduction bridge, it is to avoid narrow
The problem that little magnetic conduction bridge is easily saturated.Meanwhile, abandon the sectional type rotor structure of complexity, and
Modular primary structure is used to make alternate isolation, the fault freedom of lifting motor.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of cutting orientation magnetizing
Flux-reversal hybrid excited linear motor, including primary mover and secondary stator, described primary
Mover is formed by connecting side by side by primary module, and described primary mover and secondary stator are by magnetic conduction
Material is made, and described secondary stator such as is at the salient-pole structure of the facewidth, described primary mover and
Being air gap between secondary stator, described primary module is respectively provided on two sides with two armature tooths, institute
It is provided with an excitation tooth between two armature tooths stated, described each armature tooth is wound with a set of
Armature winding, described each excitation tooth is wound with set of excitation winding, described armature tooth
End is pasted with the permanent magnet of two pieces of opposite polarity cutting orientation magnetizings.
In described primary module, the tooth pitch of two armature tooths is λ1=(j±0.5)τp, Neighboring primary mould
Relative displacement between block is τs=kτp±(1/m)τp, τpFor secondary pole span, k, j is positive integer, m
The number of phases for motor.
Armature winding differential concatenation in described primary module, Exciting Windings for Transverse Differential Protection forward is connected.
After using technique scheme, the method have the advantages that
1. the present invention uses the permanent magnet of cutting orientation magnetizing, makes permanent magnet magnetic potential direction and armature, encourages
It is parallel with one another that magnetic winding current produces magnetic potential direction, reduces permanent magnet generation irreversible demagnetization
Risk, improves the reliability of motor.
2. the present invention makes full use of armature tooth so that it is has the function of magnetic conduction bridge, improves whereby
Adjustable magnetic efficiency.There is no additionally to add on the both sides of permanent magnet narrow and small magnetic conduction bridge, fundamentally solve
The problem that the magnetic conduction bridge having determined narrow and small is easily saturated.
3. the present invention uses modular primary structure, not only makes winding back emf sine symmetrical,
Improve the fault freedom of motor simultaneously.
4. the present invention can be easily to excitation, the armature winding number of turn, and size of current coordinates
Control, motor is carried out efficiency optimization, it is achieved optimum efficiency, be suitable for needing speed change on a large scale
The application scenario run.
Accompanying drawing explanation
Fig. 1 is the flux-reversal hybrid excited linear motor embodiment of a kind of cutting orientation magnetizing of the present invention
Structural representation.
Fig. 2 is embodiment of the present invention A phase armature winding magnetic linkage waveform under different exciting operating mode
Figure.
Fig. 3 is embodiment of the present invention A phase armature winding back-emf ripple under different exciting operating mode
Shape figure.
Fig. 4 is embodiment of the present invention flux distribution when permanent magnet independent role.
Fig. 5 is embodiment of the present invention magnetic flux distribution when permanent magnet and Exciting Windings for Transverse Differential Protection act on jointly
Figure.
In figure: 1, primary mover, 10a, primary a module, 10b, primary b module, 10c,
Primary c module, 11, armature tooth, 12, excitation tooth, 13, armature winding, 14, excitation around
Group, 15, permanent magnet, 2, secondary stator.
Detailed description of the invention
Below according to Figure of description and specific embodiment, the present invention is further explained.
As it is shown in figure 1, the flux-reversal hybrid excited linear motor of a kind of cutting orientation magnetizing, including
Primary mover 1 and secondary stator 2, described primary mover 1 by primary a module 10a, just
Level b module 10b and primary c module 10c are formed by connecting side by side, described primary mover 1 He
Secondary stator 2 is made by permeability magnetic material, and described secondary stator 2 such as is at the salient pole knot of the facewidth
Structure, is air gap between described primary mover 1 and secondary stator 2, described primary module two
Side is respectively equipped with two armature tooths 11, is provided with an excitation between two described armature tooths 11
Tooth 12, described each armature tooth 11 is wound with a set of armature winding 13, described each encourages
Being wound with set of excitation winding on magnetic tooth 12, the end of described armature tooth 11 is pasted with two pieces of poles
The permanent magnet 15 of the cutting orientation magnetizing that property is contrary.
In described primary module, the tooth pitch of two armature tooths 11 is λ1=(j±0.5)τp, Neighboring primary
Relative displacement between module is τs=kτp±(1/m)τp, τpFor secondary pole span, k, j is positive integer,
M is the number of phases of motor.
Armature winding 13 differential concatenation in described primary module, Exciting Windings for Transverse Differential Protection forward is connected.
Because embodiment of the present invention motor is three phase electric machine, therefore m=3.Take n=1 again, primary by
N module composition of m, i.e. 3 module compositions；Each module includes 2i armature tooth
11, i excitation tooth 12, i is positive integer, takes i=1, includes 2 electricity in the most each module
11,1 excitation tooth 12 of armature tooth.The present embodiment electric motor primary is respectively by 3 primary module structures
Become, as a example by primary a module 10a, in primary a module 10a, include 2 armature tooths
11(A1, A2) and 1 excitation tooth 12(U).Adjacent armatures tooth 11 in same module
Tooth pitch is λ1=(j±0.5)τp, the relative displacement between adjacent block is τs=kτp±(1/m)τp, τpFor secondary
Level pole span, k, j is positive integer.Taking k, j respectively is 7,4, adjacent electricity in the most same module
The tooth pitch of armature tooth 11 is λ1=(4+0.5)τp=4.5τp, the relative displacement between adjacent block is
τs=7τp+(1/3)τp=22τp/3.As a example by primary a module 10a, adjacent armatures tooth 11(A1, A2)
Tooth is at a distance of 4.5 τp, i.e. adhere to two set concentratred winding 180 ° of electricity of difference of the two armature tooth 11 separately
Angular phase, two set concentratred winding need differential concatenation (as shown in A phase winding in Fig. 1),
The magnetic circuit making A phase has complementarity, and in like manner B phase and C phase also have complementarity, and this is just
The first-harmonic making three opposite potential is enhanced, and high order even-order harmonic part is cancelled out each other.
The waveform sine making each opposite potential is symmetrical.As it is shown on figure 3, embodiment of the present invention straight-line electric
Machine A opposite potential oscillogram under pure permanent magnet 15 excitation, as seen from the figure, back-emf ripple
Shape sine is symmetrical.
Fig. 4 and Fig. 5 is pure permanent magnetism (pure permanent magnet 15 excitation) respectively and magnetic (is i.e. passed through increasing magnetic
Character direct current excitation and permanent magnet 15 excitation act on jointly) Distribution of Magnetic Field under two kinds of operating modes
Figure.It can be seen that A phase in Fig. 4, in i.e. primary a module 10a, permanent magnet 15 is only at own module
Middle generation magnetic field, little and other module linkages.It can be seen that A phase in Fig. 5, i.e. primary a mould
In block 10a, permanent magnet 15 and direct current excitation also only produce magnetic field in own module, seldom
With other module linkages.So, each Coupling Between Phases of the present invention is little, separate, has higher
Fault freedom.
To sum up, the present invention uses the permanent magnet 15 of cutting orientation magnetizing, make permanent magnet 15 magnetic potential direction with
It is parallel with one another that armature, Exciting Windings for Transverse Differential Protection electric current produce magnetic potential direction, reduces permanent magnet 15 and occurs not
The risk of reversible demagnetization, improves the reliability of motor.The present invention makes full use of armature tooth 11,
Make it have the function of magnetic conduction bridge, improve adjustable magnetic efficiency whereby.The most extra at permanent magnet 15
Both sides add narrow and small magnetic conduction bridge, fundamentally solve what narrow and small magnetic conduction bridge was easily saturated
Problem.The present invention uses modular primary structure, not only makes back-emf sine symmetrical, simultaneously
Improve the fault freedom of motor.
Claims (3)
1. a flux-reversal hybrid excited linear motor for cutting orientation magnetizing, including primary mover and
Secondary stator, it is characterised in that described primary mover connected side by side by primary module and
Becoming, described primary mover and secondary stator are made by permeability magnetic material, and described is secondary
The salient-pole structure of the facewidth such as level stator is, between described primary mover and secondary stator
For air gap, described primary module is respectively provided on two sides with two armature tooths, described two
It is provided with an excitation tooth between individual armature tooth, described each armature tooth is wound with a set of
Armature winding, described each excitation tooth is wound with set of excitation winding, described electricity
The end of armature tooth is pasted with the permanent magnet of two pieces of opposite polarity cutting orientation magnetizings.
The flux-reversal composite excitation straight line of a kind of cutting orientation magnetizing the most according to claim 1
Motor, it is characterised in that in described primary module, the tooth pitch of two armature tooths is
λ1=(j±0.5)τp, the relative displacement between Neighboring primary module is τs=kτp±(1/m)τp, τ p
For secondary pole span, k, j is positive integer, and m is the number of phases of motor.
The flux-reversal composite excitation straight line of a kind of cutting orientation magnetizing the most according to claim 1
Motor, it is characterised in that armature winding differential concatenation, excitation in described primary module
Winding forward is connected.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105553222A (en) * | 2016-01-21 | 2016-05-04 | 江苏大学 | End-effect-free fault-tolerant permanent magnet vernier linear motor |
| CN106385153B (en) * | 2016-09-28 | 2019-03-05 | 华中科技大学 | A kind of mixed excitation electric machine |
| CN106787598B (en) * | 2017-01-18 | 2023-11-28 | 威灵（芜湖）电机制造有限公司 | Composite excitation linear motor |
| CN107070165B (en) * | 2017-02-27 | 2019-10-08 | 华中科技大学 | A kind of flux-reversal type permanent-magnetism linear motor and its application |
| CN106787557B (en) * | 2017-03-20 | 2019-02-26 | 山东理工大学 | A kind of concentratred winding electric excitation biconvex electrode electric machine |
| CN106992655B (en) * | 2017-04-11 | 2019-06-28 | 江苏大学 | A kind of magnetic field modulation permanent-magnetism linear motor and its optimum design method improving winding utilization |
| CN107017754A (en) * | 2017-04-24 | 2017-08-04 | 江苏大学 | The fault-tolerant straight line vernier motor of cylindrical permanent |
| CN110649783B (en) * | 2019-09-26 | 2022-03-01 | 哈尔滨工业大学 | Mixed excitation linear reluctance motor system |
| CN112688526B (en) * | 2021-02-03 | 2024-04-12 | 山东理工大学 | Magnetic flux switching type variable magnetic flux linear memory motor |
| CN113300566B (en) * | 2021-06-11 | 2023-07-07 | 哈尔滨工业大学 | Modularized transverse flux permanent magnet synchronous linear motor |
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| CN101552534B (en) * | 2009-05-19 | 2011-05-11 | 哈尔滨工业大学 | Transverse flux cylinder type permanent magnet linear synchronous motor |
| JP5750358B2 (en) * | 2011-10-28 | 2015-07-22 | 山洋電気株式会社 | Electric machine |
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| CN101789676A (en) * | 2010-03-10 | 2010-07-28 | 江苏大学 | Fault-tolerance permanent magnet linear motor |
| CN101834512A (en) * | 2010-05-24 | 2010-09-15 | 东南大学 | Complementary modular hybrid excited linear motor |
| CN102938602A (en) * | 2012-11-22 | 2013-02-20 | 江苏大学 | Fault-tolerant linear motor capable of reducing and saving permanent-magnet material |
| CN203617874U (en) * | 2013-11-19 | 2014-05-28 | 江苏大学 | Magnetic flux reverse mixed excitation linear motor with tangential magnetizing |
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