CN105429423B - Bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor - Google Patents
Bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor Download PDFInfo
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- CN105429423B CN105429423B CN201510790264.6A CN201510790264A CN105429423B CN 105429423 B CN105429423 B CN 105429423B CN 201510790264 A CN201510790264 A CN 201510790264A CN 105429423 B CN105429423 B CN 105429423B
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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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Abstract
The invention discloses a kind of bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, 2 long secondary stators, the short primary mover being arranged between described 2 long secondary stators and the air gap being arranged between described short primary mover and described long secondary stator being oppositely arranged including symmetry；Described short primary mover include along the arrangement of direction of motion equi-spaced apart primary unshakable in one's determination, embed the primary permanent magnet body being arranged between Neighboring primary iron core, described primary width unshakable in one's determination more than the width of primary permanent magnet body to form primary teeth in described primary width both sides unshakable in one's determination, on described primary teeth, nesting is provided with armature winding.The armature winding of the present invention and permanent magnet are placed in short primary mover, long secondary stator is only the salient pole slab construction being made up of permeability magnetic material, the air-gap permeance change utilizing secondary salient pole to cause realizes energy converting between mechanical to primary magnetic field modulation, has simple in construction, reliability height, low cost, feature that pushing force density is big.
Description
Technical field
The present invention relates to a kind of bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, belong to oil pumping with straight
The technical field of line motor.
Background technology
Beam pumping unit utilizes electric energy to be converted to rotary motion, is converted to linear reciprocation through quadric chain again after deceleration
Motion, its drive system energy loss is up to 28%, adds that revolving property causes detent torque big, and system effectiveness is usually no more than
30%.Electric energy is converted directly into straight reciprocating motion by linear motor oil pumping machine, simplifies mechanical transmission course, is effectively improved
Efficiency, and when strengthening stroke, machine shape size and weight all increase seldom, particularly swabbing parameter can stepless changing,
Provide condition for realizing automatically controlling and meeting DP technology requirement, be a kind of rising new pumping unit.
Compared with line inductance electromotor, the energy index of permanent magnetic linear synchronous motor is high, volume is little, lightweight, therefore,
During linear motor oil pumping machine recovers the oil, permanent magnetic linear synchronous motor has obtained more applied research.
Chinese patent CN2668844 and CN100535382 disclosed " beam pumping unit that a kind of linear electric motors drive ",
The straight-line electric that Chinese patent CN201212466 disclosed " oil-submersible extracting pump that DC stepping permanent magnetism straight line motor drives " etc. mentions
In machine, permanent magnet and armature winding are separately mounted to secondary and primary, and owing to using long secondary structure, the consumption of permanent magnet is very big,
This causes system cost to increase undoubtedly.Chinese patent CN101783573 is disclosed " multiphase long-stator primary permanent magnet linear motor "
With Chinese patent CN102013786 disclosed in " Modular complementary type primary permanent magnet linear and the motor module being made up of it "
Use for reference doubly salient permanent magnet motor or the operation principle of flux switch permanent magnet motor and stator permanent magnetic type structure obtains by permanent magnet
Solve the most well with the primary permanent magnet linear motor that armature winding is placed in primary, secondary long stator is only made up of permeability magnetic material
The problem that permanent magnet consumption is big.Additionally, disclosed " a kind of bilateral primary permanent magnet vernier straight line of Chinese patent CN104052238
Motor " also use primary permanent magnet type structure, and the magnetic gear up effect of vernier motor can be utilized to realize energy conversion, but
Being multipole surface that permanent magnet is mounted on armature tooth, interelectrode magnetic leakage is big and permanent magnet utilization rate is low, causes motor power factor
The most relatively low with pushing force density.At present, in the world research compare focus field modulation magneto utilize fundamental wave magnetic field and harmonic wave magnetic
The common effect of field, it is possible to realize higher power density.Therefore, this patent uses for reference the construction features of primary permanent magnet linear motor
And based on magnetic field modulation principle, the primary permanent magnet type field modulation linear electric motors of a kind of new structure are proposed, this electric machine structure is simple,
Reliability is high, processing cost is low, and has stronger thrust output, higher forces density and the fluctuation of relatively low thrust, the most applicable
In the long stator application scenario that such as linear motor oil pumping machine recovers the oil.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of bilateral long secondary primary permanent magnet type field modulation used for oil extractor straight
Line motor.The present invention is to solve the permanent magnetic linear synchronous motor secondary long stator that the oil recovery of existing linear motor oil pumping machine uses
In structure, permanent magnet consumption is big, the problem that processing cost is high, and the Gao Gong that the magnetic field modulation effect using for reference a modulating motor brings
Rate density feature, it is provided that a kind of bilateral long secondary primary permanent magnet type field modulation that armature winding and permanent magnet are placed in primary
Linear electric motors topological structure.
Technical scheme is as follows:
A kind of bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, 2 be oppositely arranged including symmetry
Long secondary stator, the short primary mover being arranged between described 2 long secondary stators and be arranged on described short primary mover and institute
State the air gap between long secondary stator；
Described short primary mover includes being arranged on Neighboring primary along primary unshakable in one's determination, the embedding of the arrangement of direction of motion equi-spaced apart
Primary permanent magnet body between iron core, described primary width unshakable in one's determination are more than the width of primary permanent magnet body with at described primary iron core
Width both sides form primary teeth, and on described primary teeth, nesting is provided with armature winding.Described protrude from primary unshakable in one's determination wide
The primary teeth of degree both sides, direction is towards described long secondary stator.
According to currently preferred, described long secondary stator includes plate shaped secondary iron core and at described plate shaped secondary ferrum
The secondary salient pole that endocardial surface is placed equidistant, described secondary salient pole is oppositely arranged with described primary teeth.
According to currently preferred, the number of unilateral described primary teeth: Np, the number of pole-pairs of armature winding coiling: pw, unilateral
The centre distance of adjacent described primary teeth: τpCentre distance with adjacent described secondary salient pole: τs, meet relationship below (I):
Np·τp=(Np/2+pw)·τs (I)
In formula (I), Np=6k, k are positive integer；The block number of described primary permanent magnet body is Np+1。
According to currently preferred, described primary permanent magnet body magnetizes along the described short primary mover direction of motion, and adjacent institute
State primary permanent magnet body magnetizing direction contrary.
According to currently preferred, in described short primary mover difference along the primary permanent magnet body end face at direction of motion two ends
It is provided with balance gear.The advantage herein designed is, is used for balancing short primary mover end magnetic circuit, obtains the phase winding magnetic of symmetry
Chain.
According to currently preferred, the width of described balance gear is equal with described primary width unshakable in one's determination.
According to currently preferred, the secondary salient pole that described 2 plate shaped secondary iron core inner surfacies are respectively provided with each other in
Alignment is arranged.
According to currently preferred, the secondary salient pole that described 2 plate shaped secondary iron core inner surfacies are respectively provided with each other in
It is crisscross arranged.
According to currently preferred, the secondary salient pole that described 2 plate shaped secondary iron core inner surfacies are respectively provided with each other in
It is crisscross arranged, staggered difference in size: be not more than centre distance τ of adjacent described secondary salient poles1/2nd.Design herein
Advantage is, reduces short primary mover force oscillation.
According to currently preferred, described secondary salient pole end face width accounts for the ratio of adjacent described secondary salient pole centre distance τ s
Example 0.4-0.6.
According to currently preferred, the width of described primary teeth is less than the width of secondary salient pole.
Beneficial effects of the present invention:
The invention provides a kind of bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, with existing directly
The long stator type permanent magnetic linear synchronous motor that the oil recovery of line motor pumping unit uses is compared, and has the advantage that
1. the field modulation linear electric motors of the present invention, permanent magnet and armature winding are placed in short primary mover, long secondary stator
It is only the salient pole slab construction being made up of permeability magnetic material, there is simple in construction, reliability is high, processing cost is low feature；
2. the field modulation linear electric motors of the present invention work based on magnetic field modulation principle, utilize the air gap magnetic that secondary salient pole causes
Lead change and primary magnetic field modulation is realized energy converting between mechanical, it is possible to realize higher pushing force density；
3. the field modulation linear electric motors of the present invention, armature winding design all uses concentratred winding form, and winding technique is simple,
Being easily achieved modularity to roll off the production line and the processing of mover modularity, mechanical assembly is convenient；
4. the field modulation linear electric motors of the present invention use bilateral secondary structure, and primary mover is not by the shadow of monolateral side draw
Ring, and bilateral secondary salient pole can arrange with relative misalignment certain angle, it is possible to effectively reduce mover force oscillation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor；
In Fig. 1: 1, long secondary stator；11, secondary iron core；12, secondary salient pole；
2, short primary mover；21, primary unshakable in one's determination；22, primary permanent magnet body；23, primary teeth；24, armature winding；25, balance
Tooth；
3, air gap.
The most shown arrow represents primary permanent magnet body magnetizing direction.
Detailed description of the invention
Below in conjunction with embodiment and Figure of description, the present invention is described in detail, but is not limited to this.
As shown in Figure 1.
Embodiment 1,
A kind of bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, 2 be oppositely arranged including symmetry
Long secondary stator 1, the short primary mover 2 being arranged between described 2 long secondary stators 1 and be arranged on described short primary mover 2
And the air gap 3 between described long secondary stator 1；
Described short primary mover 2 includes that the primary iron core 21 along the arrangement of direction of motion equi-spaced apart, embedding are arranged on adjacent
Primary permanent magnet body 22, the described primary width of unshakable in one's determination 21 between primary unshakable in one's determination 21 are more than the width of primary permanent magnet body 22 with in institute
Stating the primary width both sides of unshakable in one's determination 21 and form primary teeth 23, on described primary teeth 23, nesting is provided with armature winding 24.
Described long secondary stator 1 includes plate shaped secondary iron core 11 and equidistant at described plate shaped secondary iron core 11 inner surface
The secondary salient pole 12 arranged, described secondary salient pole 12 is oppositely arranged with described primary teeth 23.
Described primary permanent magnet body 22 magnetizes along described short primary mover 2 direction of motion, and adjacent described primary permanent magnet body 22
Magnetizing direction is contrary.
Embodiment 2,
A kind of bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, its difference
It is, the number of unilateral described primary teeth 23: Np, the number of pole-pairs of armature winding 24 coiling: pw, unilateral adjacent described primary teeth 23
Centre distance: τpCentre distance with adjacent described secondary salient pole 12: τs, meet relationship below (I):
Np·τp=(Np/2+pw)·τs (I)
In formula (I), Np=6k, k are positive integer；The block number of described primary permanent magnet body 22 is Np+1。
Embodiment 3,
One bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor as described in embodiment 1,2, its district
It is not, along primary permanent magnet body 22 end face at direction of motion two ends, is respectively arranged with balance gear 25 at described short primary mover 2.
Embodiment 4,
A kind of bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, its difference
Being, the width of described balance gear 25 is equal with the described primary width of unshakable in one's determination 21.
Embodiment 5,
One bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor as described in embodiment 1,2,3,4,
Its difference is, the secondary salient pole 12 that described 2 plate shaped secondary iron core 11 inner surfacies are respectively provided with is arranged in alignment each other.
Embodiment 6,
One bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor as described in embodiment 1,2,3,4,
Its difference is, the secondary salient pole 12 that described 2 plate shaped secondary iron core 11 inner surfacies are respectively provided with, each other in being crisscross arranged, is handed over
Wrong difference in size: be not more than centre distance τ of adjacent described secondary salient pole 12s1/2nd.
Embodiment 7,
One bilateral long secondary primary permanent magnet type field modulation straight-line electric used for oil extractor as described in embodiment 1,2,3,4,5,6
Machine, its difference is, the end face width of described secondary salient pole 12 accounts for centre distance τ of adjacent described secondary salient pole 12sRatio
For 0.4-0.6.
Embodiment 8,
One bilateral long secondary primary permanent magnet type field modulation straight line used for oil extractor as described in embodiment 1,2,3,4,5,6,7
Motor, its difference is, the width of described primary teeth 23 is less than the width of secondary salient pole 12.
The principle of the present invention is as follows:
See Fig. 1, between long secondary stator 1 and the short primary mover 2 of the present invention, air gap 3 is set, to ensure that primary can
Freely-movable.
In described primary mover 2, primary iron core 21 and primary permanent magnet body 22 are alternately arranged along the mover direction of motion, primary
21 width both sides unshakable in one's determination arrange the primary teeth 23 of protrusion towards secondary stator direction, it is contemplated that magnetic circuit balances, and move in primary
Also needing to arrange balance gear 25 on primary permanent magnet body 22 end face of sub-two ends, therefore, the block number of primary permanent magnet body 22 is than unilateral primary teeth
The number many 1 of 23, armature winding 24 uses concentratred winding form to be wound on primary teeth 23.
Described primary permanent magnet body 22 is made up of rare-earth Nd-Fe-B or other permanent magnet material, and primary permanent magnet body 22 is transported along mover
Magnetize in dynamic direction, and Neighboring primary permanent magnet 22 magnetizing direction is contrary.
The long secondary stator 1 of the present invention is by plate shaped secondary iron core 11 and some equidistantly protrudes from secondary iron core surface and court
Constituting to the secondary salient pole 12 of primary side, primary magnetic field can be modulated, in order to obtain preferable magnetic field by secondary salient pole 12
Modulation effect and higher pushing force density, the present invention also needs to be optimized design to the end face width of secondary salient pole 12, described
The end face width of secondary salient pole 12 accounts for centre distance τ of adjacent described secondary salient pole 12sRatio be 0.4-0.6, meanwhile, primary
The width of tooth 23 is less than the width of secondary salient pole 12.
Described secondary iron core 11, secondary salient pole 12, primary unshakable in one's determination 21, primary teeth 23, balance gear 25 by silicon steel laminations or
Other permeability magnetic material is constituted, identical with the primary of common permanent magnetic linear synchronous motor, secondary iron core manufacturing process.
Being different from existing long stator type permanent magnetic linear synchronous motor, the linear electric motors of the present invention have employed primary permanent magnet type
Structure, is different from again existing long-stator primary permanent magnet linear motor, and the linear electric motors of the present invention are based on magnetic field modulation principle work
Make, so, the bilateral long secondary primary permanent magnet type field modulation linear electric motors that the present invention proposes set in theory analysis, structure optimization
The aspects such as meter, parameter calculating are essentially different with existing linear electric motors.The linear electric motors of the present invention are by secondary salient pole
12 and the air-gap permeance change that causes of primary teeth 23 magnetic field that primary permanent magnet body 22 is produced be modulated, so that secondary fixed
Sub-field pole logarithm is no longer identical with primary permanent magnet magnetic field number of pole-pairs.Now, the number of pole-pairs of primary armature winding 24 coiling
No longer identical with primary permanent magnet magnetic field number of pole-pairs, but the number of pole-pairs less secondary stator magnetic field number of pole-pairs phase produced with modulation
With, number N of the primary teeth 23 that the most described short primary mover is unilateralp, number of pole-pairs p of armature winding 24 coilingw, short primary mover
Centre distance τ of unilateral Neighboring primary toothp, centre distance τ of long secondary stator neighboring secondary salient polesMeet following relation:
Np·τp=(Np/2+pw)·τs, (I)
Seeing Fig. 1, shown linear electric motors are in effective range primary, secondary, and monolateral secondary salient pole 12 number is 13, dynamic
The primary number of teeth 23 of son one side is 18, then the number of pole-pairs of armature winding 24 coiling is 4.
Due to operation principle and the particularity of structure, on the linear electric motor primary tooth of the present invention, winding magnetic linkage is unipolarity
Magnetic linkage, so armature winding 24 all uses concentratred winding form design, this winding method further simplify inserting-coil process, it is simple to
Carry out the modularity processing of primary mover.Additionally, in order to around making three-phase symmetric winding, except additional equilibrium tooth 25, move
Number N of the primary teeth 23 that son is unilateralpShould meet:
Np=6k, wherein, k is positive integer.Now, the block number of described primary permanent magnet body 22 is Np+1。
Armature winding and permanent magnet are all put by the bilateral long secondary primary permanent magnet type field modulation linear electric motors that the present invention relates to
In short primary mover, long secondary stator is only the salient pole slab construction being made up of permeability magnetic material, and based on magnetic field modulation principle
Realize energy converting between mechanical, there is simple in construction, reliability height, low cost, feature that pushing force density is big.
The foregoing is only the better embodiment of the present invention, protection scope of the present invention with above-mentioned embodiment is not
Limit, as long as those of ordinary skill in the art modify or change according to the equivalence that disclosed content is made, all should include power in
In profit protection domain described in claim.
Claims (8)
1. bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is characterised in that this linear electric motors bag
Include 2 long secondary stators, the short primary mover being arranged between described 2 long secondary stators that symmetry is oppositely arranged and be arranged on
Air gap between described short primary mover and described long secondary stator；Described short primary mover includes along direction of motion equi-spaced apart
Primary permanent magnet body, described primary width unshakable in one's determination that primary unshakable in one's determination, the embedding of arrangement is arranged between Neighboring primary iron core are more than
The width of primary permanent magnet body is to form primary teeth in described primary width both sides unshakable in one's determination, and on described primary teeth, nesting sets
It is equipped with armature winding；
Described long secondary stator include plate shaped secondary iron core and described plate shaped secondary iron core inner surface be placed equidistant time
Level salient pole, described secondary salient pole is oppositely arranged with described primary teeth；
The number of unilateral described primary teeth: Np, the number of pole-pairs of armature winding coiling: pw, the centre-to-centre spacing of unilateral adjacent described primary teeth
From: τpCentre distance with adjacent described secondary salient pole: τs, meet relationship below (I):
Np·τp=(Np/2+pw)·τs (I)
In formula (I), Np=6k, k are positive integer；The block number of described primary permanent magnet body is Np+1。
One the most according to claim 1 bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is special
Levying and be, described primary permanent magnet body magnetizes along the described short primary mover direction of motion, and the adjacent described primary permanent magnet body side of magnetizing
To on the contrary.
One the most according to claim 1 bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is special
Levy and be, along the primary permanent magnet body end face at direction of motion two ends, be respectively arranged with balance gear at described short primary mover.
One the most according to claim 3 bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is special
Levying and be, the width of described balance gear is equal with described primary width unshakable in one's determination.
One the most according to claim 1 bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is special
Levying and be, the secondary salient pole that described 2 plate shaped secondary iron core inner surfacies are respectively provided with is arranged in alignment each other.
One the most according to claim 1 bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is special
Levying and be, the secondary salient pole that described 2 plate shaped secondary iron core inner surfacies are respectively provided with is each other in being crisscross arranged.
One the most according to claim 6 bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is special
Levy and be, the secondary salient pole that described 2 plate shaped secondary iron core inner surfacies are respectively provided with each other in being crisscross arranged, staggered size
Difference: be not more than centre distance τ of adjacent described secondary salient poles1/2nd.
One the most according to claim 1 bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor, it is special
Levying and be, described secondary salient pole end face width accounts for adjacent described secondary salient pole centre distance τsRatio be 0.4-0.6；At the beginning of described
The width of level tooth is less than the width of secondary salient pole.
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| CN201510790264.6A CN105429423B (en) | 2015-11-17 | 2015-11-17 | Bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor |
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| CN201510790264.6A CN105429423B (en) | 2015-11-17 | 2015-11-17 | Bilateral long secondary primary permanent magnet type field modulation linear electric motors used for oil extractor |
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| CN105720784A (en) * | 2016-04-13 | 2016-06-29 | 邹宇 | Symmetric double-sided permanent magnet assisted linear switch reluctance motor |
| CN110661396A (en) * | 2018-06-29 | 2020-01-07 | 河南东迪电气有限公司 | Linear power generation device |
| CN108900065A (en) * | 2018-08-31 | 2018-11-27 | 重庆大学 | A kind of Double-edge type permanent magnetism vernier linear motor |
| CN109391119A (en) * | 2018-11-01 | 2019-02-26 | 湖南高精特电装备有限公司 | A kind of bilateral line inductance electromotor with modular characteristics |
| CN113162365B (en) * | 2021-05-11 | 2023-10-13 | 沈阳工业大学 | Double-sided magnetic flux switching type magnetic suspension permanent magnet linear synchronous motor and control method thereof |
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| JP2000316271A (en) * | 1999-04-27 | 2000-11-14 | Yaskawa Electric Corp | Linear motor |
| CN201985741U (en) * | 2011-01-04 | 2011-09-21 | 东南大学 | Bilateral magnetic flux switching permanent magnet linear motor |
| CN103633809B (en) * | 2013-11-18 | 2015-12-30 | 江苏大学 | A kind of bilateral magnetic flux switches permanent-magnetism linear motor |
| CN104167896B (en) * | 2014-08-07 | 2016-09-14 | 江苏大学 | A kind of T-shaped magnetic flux switching permanent-magnetism linear motor and module thereof |
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