CN103633810A - Tangential-magnetized magnetic flux reversed mixed excitation linear motor - Google Patents
Tangential-magnetized magnetic flux reversed mixed excitation linear motor Download PDFInfo
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- 230000005284 excitation Effects 0.000 title claims abstract description 40
- 230000004907 flux Effects 0.000 title claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 35
- 230000002441 reversible effect Effects 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000005415 magnetization Effects 0.000 claims 1
- 230000005347 demagnetization Effects 0.000 abstract description 6
- 230000002427 irreversible effect Effects 0.000 abstract description 5
- 229920006395 saturated elastomer Polymers 0.000 abstract description 5
- 210000000515 tooth Anatomy 0.000 description 34
- 238000005520 cutting process Methods 0.000 description 11
- 238000009826 distribution Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
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Abstract
本发明公开了一种切向充磁的磁通反向混合励磁直线电机，包括初级动子和次级定子，所述的初级动子由初级模块并列连接而成，所述的初级动子和次级定子均由导磁材料制成，所述的次级定子为等齿宽的凸极结构，所述的初级动子和次级定子之间为气隙，所述的初级模块两侧分别设有两个电枢齿，所述的两个电枢齿之间设有一个励磁齿，所述的每个电枢齿上绕有一套电枢绕组，所述的每个励磁齿上绕有一套励磁绕组，所述的电枢齿的端部贴装有两块极性相反的切向充磁的永磁体。降低了永磁体发生不可逆退磁的风险，提高了电机的可靠性。解决了狭小的导磁桥易于饱和的问题。提高了电机的容错性能。适合于需要大范围变速运行的应用场合。
The invention discloses a tangentially magnetized magnetic flux reverse hybrid excitation linear motor, which includes a primary mover and a secondary stator. The primary mover is formed by connecting primary modules in parallel. The primary mover and the The secondary stators are all made of magnetically permeable materials. The secondary stators have a salient pole structure with equal tooth width. There is an air gap between the primary mover and the secondary stator. The two sides of the primary module are respectively There are two armature teeth, an excitation tooth is arranged between the two armature teeth, a set of armature windings is wound on each armature tooth, and a set of armature windings is wound on each excitation tooth. The field winding is set, and the ends of the armature teeth are mounted with two tangentially magnetized permanent magnets with opposite polarities. The risk of irreversible demagnetization of permanent magnets is reduced and the reliability of the motor is improved. It solves the problem that the narrow magnetic bridge is easy to be saturated. Improve the fault tolerance performance of the motor. Suitable for applications requiring a wide range of variable speed operation.
Description
Technical field
The present invention relates to the flux-reversal hybrid excited linear motor of a kind of magnetic flux reverse motor, particularly a kind of cutting orientation magnetizing.
Background technology
In needs Linear transmission occasion, linear electric motors have higher transmission efficiency than electric rotating machine, can promote the performance of whole system.Especially in wheel track traffic system, linear electric motors have that climbing capacity is strong, circuit applicability is strong, project cost is low and the advantage such as noise is low.Now, the linear electric motors of induction type are applied in various countries' urban track traffic.But induction machine excitation loss is large, power factor is low.Than induction machine, permanent-magnetism linear motor energy index is high, efficiency is high, power factor is high.Concerning traditional permanent-magnetism linear motor, be no matter by winding or permanent magnet along track laying, along with the increase of track length, the manufacturing cost of motor also will sharply increase.
Flux-reversal linear machine is different from traditional permanent-magnetism linear motor, its permanent magnet and winding be all positioned at short elementary on.And length is secondary, only by cheap silicon steel sheet stack, be pressed into, be applicable to very much the laying along the long line of track.After but motor is made, air-gap field is difficult to regulate, and then brings Constant-power speed range little, and the problem of weak magnetic speed-up difficulty, is unfavorable for the speed governing of train.In addition, also cannot demagnetization when motor is short-circuited fault, may cause fault to expand, be unfavorable for the safe operation of train.
Mixed excitation electric machine combines the advantage of magneto and electro-magnetic motor, on the basis of permanent magnet motor structure, adds excitation winding, can to air-gap field, regulate easily, thus the speed adjustable range of expansion motor.China authorize patent of invention CN200910035497.X and
CN201210083874.9 discloses respectively a kind of composite excitation type magnetic flux reverse motor, on original permanent magnet flux reverse motor architecture basics, all do not make too large variation, retained the compact simple structure of permanent magnet flux reverse motor, excitation winding does not take slot space, do not need additionally to increase the volume of motor, still, because magnetic flux need to pass permanent magnet, therefore, regulate the efficiency in magnetic field not high.China authorize patent of invention CN201320123623.9 and
CN201110097982.7 discloses a kind of rotor sectional type mixed excited magnetic pass reverse motor, on permanent magnet both sides, all leaves magnetic conduction bridge, and therefore, motor adjustable magnetic performance is improved.The rotor structure of segmented has also improved the fault freedom of motor.But the width of magnetic conduction bridge is comparatively narrow and small, easily saturated, restricted the adjustable magnetic ability of motor.The rotor of segmented makes troubles also to manufacture processing and installation.In addition, in above electric machine structure, the magnetizing direction of permanent magnet is radially, and the magnetic potential that passes into electric current generation with armature, excitation winding is connected mutually, and irreversible demagnetization easily occurs permanent magnet, and motor is broken down.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of flux-reversal hybrid excited linear motor of cutting orientation magnetizing, adopt the permanent magnet of cutting orientation magnetizing, its magnetizing direction and armature, excitation winding magnetic potential are in parallel, and are not easy, under curent change impacts, irreversible demagnetization occurs.The magnetic flux that excitation winding produces does not need through the very large permanent magnet of magnetic resistance, has therefore improved the adjustable magnetic efficiency of motor.In fact armature tooth has served as the function of magnetic conduction bridge, has avoided narrow and small magnetic conduction bridge to be easy to saturated problem.Meanwhile, abandon complicated sectional type rotor structure, and adopt modular primary structure to make separately from, 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 flux-reversal hybrid excited linear motor of cutting orientation magnetizing, comprise elementary mover and secondary stator, described elementary mover is formed by connecting side by side by primary module, described elementary mover and secondary stator are made by permeability magnetic material, the salient-pole structure of the facewidth such as described secondary stator is, between described elementary mover and secondary stator, it is air gap, described primary module both sides are respectively equipped with two armature tooths, between two described armature tooths, be provided with an excitation tooth, on each described armature tooth, be wound with a set of armature winding, on each described excitation tooth, be wound with a set of excitation winding, the end of described armature tooth is pasted with the permanent magnet of two opposite polarity cutting orientation magnetizings.
In described primary module, the tooth pitch of two armature tooths is λ
1=(j ± 0.5) τ
p, the relative displacement between adjacent primary module is τ
s=k τ
p± (1/m) τ
p, τ
pfor secondary pole span, k, j is positive integer, the number of phases that m is motor.
Armature winding differential concatenation in described primary module, the series connection of excitation winding forward.
Adopt after technique scheme, the present invention has following beneficial effect:
1. the present invention adopts the permanent magnet of cutting orientation magnetizing, makes permanent magnet magnetic potential direction and armature, excitation winding electric current produce magnetic potential direction parallel with one another, has reduced the risk of permanent magnet generation irreversible demagnetization, has improved the reliability of motor.
2. the present invention makes full use of armature tooth, makes it have the function of magnetic conduction bridge, improves whereby adjustable magnetic efficiency.Do not have additionally on the both sides of permanent magnet, to add narrow and small magnetic conduction bridge, fundamentally solved narrow and small magnetic conduction bridge and be easy to saturated problem.
3. the present invention adopts modular primary structure, not only makes winding back emf sinusoidal symmetrical, has improved 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 is coordinated to control, and motor is carried out to efficiency optimization, realizes optimum efficiency, is suitable for the application scenario of variable-speed operation on a large scale.
Accompanying drawing explanation
Fig. 1 is the structural representation of the flux-reversal hybrid excited linear motor embodiment of a kind of cutting orientation magnetizing of the present invention.
Fig. 2 is the A phase armature winding magnetic linkage oscillogram of the embodiment of the present invention under different exciting operating mode.
Fig. 3 is the A phase armature winding counter potential waveform figure of the embodiment of the present invention under different exciting operating mode.
Fig. 4 is embodiment of the present invention flux distribution when permanent magnet independent role.
Fig. 5 is embodiment of the present invention flux distribution when permanent magnet and excitation winding acting in conjunction.
In figure: 1, elementary mover, 10a, elementary a module, 10b, elementary b module, 10c, elementary c module, 11, armature tooth, 12, excitation tooth, 13, armature winding, 14, excitation winding, 15, permanent magnet, 2, secondary stator.
Embodiment
According to Figure of description and specific embodiment, the present invention is further explained below.
As shown in Figure 1, a kind of flux-reversal hybrid excited linear motor of cutting orientation magnetizing, comprise elementary mover 1 and secondary stator 2, described elementary mover 1 is by elementary a module 10a, elementary b module 10b and elementary c module 10c are formed by connecting side by side, described elementary mover 1 and secondary stator 2 are made by permeability magnetic material, the salient-pole structure of the facewidth such as described secondary stator 2 is, between described elementary mover 1 and secondary stator 2, it is air gap, described primary module both sides are respectively equipped with two armature tooths 11, between two described armature tooths 11, be provided with an excitation tooth 12, on each described armature tooth 11, be wound with a set of armature winding 13, on each described excitation tooth 12, be wound with a set of excitation winding, the end of described armature tooth 11 is pasted with the permanent magnet 15 of two opposite polarity cutting orientation magnetizings.
In described primary module, the tooth pitch of two armature tooths 11 is λ
1=(j ± 0.5) τ
p, the relative displacement between adjacent primary module is τ
s=k τ
p± (1/m) τ
p, τ
pfor secondary pole span, k, j is positive integer, the number of phases that m is motor.
Armature winding 13 differential concatenations in described primary module, the series connection of excitation winding forward.
Because embodiment of the present invention motor is three phase electric machine, therefore m=3.Get again n=1, elementary by mn module composition, i.e. 3 module compositions; In each module, include 2i armature tooth 11, an i excitation tooth 12, i is positive integer, gets i=1, in each module, includes 11,1 excitation tooth 12 of 2 armature tooths.The present embodiment electric motor primary consists of 3 primary module respectively, and the elementary a module 10a of take is example, in elementary a module 10a, includes 2 armature tooth 11(A1, A2) and 1 excitation tooth 12(U).In same module, the tooth pitch of adjacent armature tooth 11 is λ
1=(j ± 0.5) τ
p, the relative displacement between adjacent block is τ
s=k τ
p± (1/m) τ
p, τ
pfor secondary pole span, k, j is positive integer.Getting respectively k, j is 7,4, and in same module, the tooth pitch of adjacent armature tooth 11 is λ
1=(4+0.5) τ
p=4.5 τ
p, the relative displacement between adjacent block is τ
s=7 τ
p+ (1/3) τ
p=22 τ
p/ 3.The elementary a module 10a of take is example, adjacent armature tooth 11(A1, A2) tooth is at a distance of 4.5 τ
padhering to two covers of these two armature tooths 11 separately concentrates winding to differ 180 ° of electrical degree phase places, two covers concentrate winding to need differential concatenation (as shown in A phase winding in Fig. 1), make the magnetic circuit of A phase there is complementarity, in like manner B phase and C also have complementarity mutually, this just makes the first-harmonic of three opposite potential all obtain enhancing, and high order even-order harmonic is partly cancelled out each other.Make the waveform of each opposite potential sinusoidal symmetrical.As shown in Figure 3, the A opposite potential oscillogram of embodiment of the present invention linear electric motors under pure permanent magnet 15 excitations, as seen from the figure, counter potential waveform is sinusoidal symmetrical.
Fig. 4 and Fig. 5 are respectively pure permanent magnetism (pure permanent magnet 15 excitations) and increase the Distribution of Magnetic Field figure under two kinds of operating modes of magnetic (pass into and increase magnetic property direct current excitation and permanent magnet 15 excitation actings in conjunction).In Fig. 4, can see A phase, in elementary a module 10a, 15 of permanent magnets produce magnetic field in self module, seldom with other module linkages.In Fig. 5, can see A phase, in elementary a module 10a, permanent magnet 15 and direct current excitation also only produce magnetic field in self module, seldom with other module linkages.So each Coupling Between Phases of the present invention is little, separate, have compared with high fault tolerance energy.
To sum up, the present invention adopts the permanent magnet 15 of cutting orientation magnetizing, makes permanent magnet 15 magnetic potential directions and armature, excitation winding electric current produce magnetic potential direction parallel with one another, has reduced the risk that irreversible demagnetizations occur for permanent magnet 15, has improved the reliability of motor.The present invention makes full use of armature tooth 11, makes it have the function of magnetic conduction bridge, improves whereby adjustable magnetic efficiency.Do not have additionally on the both sides of permanent magnet 15, to add narrow and small magnetic conduction bridge, fundamentally solved narrow and small magnetic conduction bridge and be easy to saturated problem.The present invention adopts modular primary structure, not only makes back-emf sinusoidal symmetrical, has improved the fault freedom of motor simultaneously.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553222A (en) * | 2016-01-21 | 2016-05-04 | 江苏大学 | End-effect-free fault-tolerant permanent magnet vernier linear motor |
| CN106385153A (en) * | 2016-09-28 | 2017-02-08 | 华中科技大学 | Hybrid excitation Motor |
| CN106787598A (en) * | 2017-01-18 | 2017-05-31 | 威灵（芜湖）电机制造有限公司 | Compound rectifier excitation linear electric motors |
| CN106787557A (en) * | 2017-03-20 | 2017-05-31 | 山东理工大学 | A kind of concentratred winding electric excitation biconvex electrode electric machine |
| CN106992655A (en) * | 2017-04-11 | 2017-07-28 | 江苏大学 | A Field Modulated Permanent Magnet Linear Motor with Improved Winding Utilization and Its Optimal Design Method |
| CN107017754A (en) * | 2017-04-24 | 2017-08-04 | 江苏大学 | The fault-tolerant straight line vernier motor of cylindrical permanent |
| CN107070165A (en) * | 2017-02-27 | 2017-08-18 | 华中科技大学 | A kind of flux-reversal type permanent-magnetism linear motor and its application |
| CN110649783A (en) * | 2019-09-26 | 2020-01-03 | 哈尔滨工业大学 | Hybrid Excitation Linear Reluctance Motor System |
| CN112688526A (en) * | 2021-02-03 | 2021-04-20 | 山东理工大学 | Magnetic flux switching type variable magnetic flux linear memory motor |
| CN113300566A (en) * | 2021-06-11 | 2021-08-24 | 哈尔滨工业大学 | Modularized transverse flux permanent magnet synchronous linear motor |
| CN117277722A (en) * | 2023-10-11 | 2023-12-22 | 珠海格力电器股份有限公司 | Linear motor rotor structure and linear motor |
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| 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 |
| CN106385153A (en) * | 2016-09-28 | 2017-02-08 | 华中科技大学 | Hybrid excitation Motor |
| CN106385153B (en) * | 2016-09-28 | 2019-03-05 | 华中科技大学 | A kind of mixed excitation electric machine |
| CN106787598A (en) * | 2017-01-18 | 2017-05-31 | 威灵（芜湖）电机制造有限公司 | Compound rectifier excitation linear electric motors |
| 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 |
| CN107070165A (en) * | 2017-02-27 | 2017-08-18 | 华中科技大学 | A kind of flux-reversal type permanent-magnetism linear motor and its application |
| CN106787557A (en) * | 2017-03-20 | 2017-05-31 | 山东理工大学 | A kind of concentratred winding electric excitation biconvex electrode electric machine |
| CN106787557B (en) * | 2017-03-20 | 2019-02-26 | 山东理工大学 | A concentrated winding electric excitation doubly salient motor |
| CN106992655A (en) * | 2017-04-11 | 2017-07-28 | 江苏大学 | A Field Modulated Permanent Magnet Linear Motor with Improved Winding Utilization and Its Optimal Design Method |
| CN107017754A (en) * | 2017-04-24 | 2017-08-04 | 江苏大学 | The fault-tolerant straight line vernier motor of cylindrical permanent |
| CN110649783A (en) * | 2019-09-26 | 2020-01-03 | 哈尔滨工业大学 | Hybrid Excitation Linear Reluctance Motor System |
| CN112688526A (en) * | 2021-02-03 | 2021-04-20 | 山东理工大学 | Magnetic flux switching type variable magnetic flux linear memory motor |
| CN112688526B (en) * | 2021-02-03 | 2024-04-12 | 山东理工大学 | Magnetic flux switching type variable magnetic flux linear memory motor |
| CN113300566A (en) * | 2021-06-11 | 2021-08-24 | 哈尔滨工业大学 | Modularized transverse flux permanent magnet synchronous linear motor |
| CN117277722A (en) * | 2023-10-11 | 2023-12-22 | 珠海格力电器股份有限公司 | Linear motor rotor structure and linear motor |
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