CN102437702A - Vernier linear motor for direct-drive sea-wave power generation - Google Patents
Vernier linear motor for direct-drive sea-wave power generation Download PDFInfo
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- CN102437702A CN102437702A CN2011104440083A CN201110444008A CN102437702A CN 102437702 A CN102437702 A CN 102437702A CN 2011104440083 A CN2011104440083 A CN 2011104440083A CN 201110444008 A CN201110444008 A CN 201110444008A CN 102437702 A CN102437702 A CN 102437702A
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Abstract
The invention relates to a vernier linear motor for direct-drive sea-wave power generation. The motor comprises a long primary motor and a short secondary motor, wherein the long primary motor comprises a stator core (8) of a stator, a three-phase winding (6), a stator permanent magnet (4) and stator teeth (5) on the periphery of the stator; the stator core (8) adopts an open slot structure, namely that a stator groove (7) is arranged on the stator core (8); the stator permanent magnet (4) is distributed between the two adjacent stator teeth (5); the three-phase winding (6) is nested in the stator groove (7) of the stator core (8); and the short secondary motor comprises a rotor core (1) of a rotor and a rotor permanent magnet (2). According to the vernier linear motor provided by the invention, the non-contact transmission ratio of 1: 6.75 can be realized; the stable and efficient transmission thrust and power can be realized; and the vernier linear motor can be applied to the low-speed direct-drive occasions of the wave power generation. Therefore, a power generation system is simplified and the reliability of the device is improved.
Description
Technical field
The present invention relates to a kind of seawave power generation that directly drives and use the cursor type linear electric motors, can realize the device of low-speed direct driving generating, belong to the seawave power generation field.
Background technology
Ocean wave energy is a kind of free of contamination renewable clear energy sources.Traditional sea wave power generation system mainly is made up of rotary generator and mechanical gear transmission mechanism, converts the low-speed rectilinear movement of wave to high speed rotary motion through gear drive.Yet, adopt gear box to carry out speed governing as intermediate link, the whole drive system volume and weight is increased, also have problems such as noise, wearing and tearing, low-response, efficient are low simultaneously.Magnetic field modulation formula magneto is a kind of direct-drive motor of nearest proposition, and its core concept is the application that the magnetic gear is realized contactless transmission, and the magnetic gear has advantages such as noiseless, low-speed high-thrust, overload protection as a kind of new gear structure.Yet the structure of its pair air gap exists air-gap reluctance bigger, and making needs higher technological level, this structure directly is used for seawave power generation implements difficulty.Therefore, be necessary to propose a kind of novel direct drive seawave power generation and use linear electric motors.
Summary of the invention
Technical problem: the present invention is directed to the traditional mechanical gear drive speed of service and sea wave power generation system speed does not match; Propose a kind of seawave power generation that directly drives and used the cursor type linear electric motors; Solved that mechanical step-up gear power density in the existing transmission device is low, problem such as mechanical wear and noise, solved two gap structures of independent adjustable magnetic ring simultaneously, simplified the device manufacture craft; Volume, the weight of motor have been reduced; Reduce manufacturing cost, improved the capacity of efficient and motor, improved the generating capacity of device.
Technical scheme: for solving the problems of the technologies described above, the invention provides a kind of seawave power generation that directly drives and use the cursor type linear electric motors, this motor comprises that motor is long elementary short secondary with motor;
The long elementary stator tooth that comprises stator core, three phase windings, the stator permanent magnet of stator and be arranged on the stator periphery of motor; Stator core adopts the open slot structure, promptly offers stator slot in the stator core; Stator permanent magnet is distributed between two adjacent stator tooths, and three phase windings embed within the stator slot of stator core;
The short secondary mover iron core that comprises mover of motor, rotor permanent magnet; Rotor permanent magnet axially spaced-apart and embedding equidistantly on the mover iron core, mover cylindrical shape iron core is fixed in the floating drum, and floating drum is across the sea floating.
Preferably, between stator core and the mover iron core air gap is arranged.
Preferably, stator permanent magnet material and rotor permanent magnet material are the permanent magnetic material rare-earth Nd-Fe-B, and stator permanent magnet and rotor permanent magnet all adopt radial magnetizing, and stator permanent magnet and rotor permanent magnet are opposite in the polarity of air gap both sides.
Preferably, stator tooth and stator slot combination are used to carry out magnetic field modulation, and satisfying equal length is the stator tooth number n of L
sBe rotor permanent magnet number of pole-pairs n
rWith three phase winding number of pole-pairs n
pSum.
Preferably, rotor permanent magnet number of pole-pairs n
r=27, three phase winding number of pole-pairs n
p=4.
Preferably, the material of stator core and mover iron core is silicon steel sheet.
Beneficial effect:
(1) directly drive, no intermediate mechanical gear transmission structure has been simplified electricity generation system, and the operating mode when being specially adapted to wave low speed can realize being equivalent to the effect of motor speedup, has reduced the volume of motor, has improved generating efficiency.
(2) stator and mover all have permanent magnet and opposite in the polarity of air gap both sides, have improved air gap flux density, have reduced leakage field; Effective harmonic wave composition value of row ripple cutting magnetic field is higher than general magnetic field modulation system permanent-magnetism linear motor after the stator modulation; Can suppress the fluctuation of row ripple cutting magnetic field, the limit end effect has been eliminated in the design of cylinder-shaped device simultaneously; Thereby improved the control precision of generator, improved the quality of power supply.
(3) isolate through unshakable in one's determination between the rotor permanent magnet, blocked flowing each other of eddy current in each permanent magnet, reduced the eddy current loss in the rotor permanent magnet.
(4) motor is a compact list gap structure, effectively reduces the magnetic resistance impedance, and processing technology is simple, and stability and reliability are improved.
(5) design of permanent magnet on mover and the stator reduces motor flux leakage, thereby has reduced loss.
(6) rotor permanent magnet adopts high energy product neodymium iron boron excitation, substitutes electric excitation, does not have slip ring and brushgear, has advantages such as the little and electrical control of loss is more simple.
(7) rotor permanent magnet adopts surperficial plug in construction, can make the linear electric motors operational speed range wide, carries out weak magnetic control system, obtains good runnability.
(8) contactless variable transmission mechanism can effectively suppress the travelling-magnetic-field distortion, guarantees higher generating efficiency.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Wherein have: mover iron core 1, rotor permanent magnet 2, air gap 3, stator permanent magnet 4, stator tooth 5, three phase windings 6, stator slot 7, stator core 8, floating drum 9, sea 10.
Fig. 2 is the A-A cutaway view of Fig. 1.
Wherein have: mover iron core 1, rotor permanent magnet 2, air gap 3, stator permanent magnet 4, stator slot 7, stator core 8, floating drum 9, fixed axis 11.
Embodiment
The present invention will be described below with reference to accompanying drawings.
The present invention discloses a kind of seawave power generation that directly drives of magnetic field modulation formula and uses the cursor type linear electric motors; Utilize the wave fluctuating to promote floating drum and do rectilinear motion up and down; Make the secondary permanent magnet that is fixed in the floating drum produce the low speed travelling-magnetic-field; After the magnetic field modulation of long elementary stator tooth, form the high speed travelling-magnetic-field again, cut static relatively elementary threephase armature winding, produce induced electromotive force.Because elementary stator tooth has the magnetic field modulation effect; Can realize the speedup of travelling-magnetic-field; The permanent magnet that embeds on the stator has simultaneously increased air gap flux density, has reduced leakage field, the effect of the high electromotive force of elementary winding internal induction when reaching mover low speed; The three-phase electricity of with DC-to-AC converter the cursor type linear electric motors being sent again is converted into the power frequency electricity, just can give user or electrical network with power delivery.
The seawave power generation that directly drives of the present invention comprises cylindric stator core, armature winding, stator permanent magnet, cylindric mover iron core, rotor permanent magnet with the cursor type linear electric motors.Rotor permanent magnet vertically the compartment of terrain, embed on the mover iron core equably, stator core adopts the open slot structure, three phase windings embed in the wire casing of stator core, stator permanent magnet embeds between two stator tooths; Long elementary stator core is through being anchored on the bottom, and short secondary mover iron core is fixed in the floating drum, and is across the sea floating.
When wave promotes floating drum with speed v
1During rectilinear motion, produce speed v up and down
1The low speed travelling-magnetic-field, after the adjustable magnetic effect through stator tooth, formation speed is 6.75v in the stator teeth groove
1The High Speed Modulation travelling-magnetic-field, send electric energy behind the cutting stator armature winding.
This installs single air gap both sides all has permanent magnet, utilizes finite element can optimize and revise permanent magnet width and thickness, compares with traditional two air gap magnetic gear composite generators, and it can provide bigger effective magnetic field harmonic wave composition, is fit to directly drive the generating occasion.
Referring to Fig. 1, Fig. 2, the seawave power generation that directly drives provided by the invention is used the cursor type linear electric motors, and this motor comprises that motor is long elementary short secondary with motor;
The long elementary stator core that comprises stator of motor 8, three phase windings 6, stator permanent magnet 4 and be arranged on the stator tooth 5 of stator periphery; Stator core 8 adopts the open slot structure, i.e. offer stator slot 7 in the stator core 8; Stator permanent magnet 4 is distributed between two adjacent stator tooths 5, and three phase windings 6 embed within the stator slot 7 of stator core 8;
The short secondary mover iron core 1 that comprises mover of motor, rotor permanent magnet 2; Rotor permanent magnet 2 axially spaced-aparts and embedding equidistantly on mover iron core 1, mover cylindrical shape iron core 1 is fixed in the floating drum 9, and floating drum 9 swims on the sea 10.
Between stator core 8 and the mover iron core 1 air gap 3 is arranged.
Stator permanent magnet 4 materials and rotor permanent magnet 2 materials are the permanent magnetic material rare-earth Nd-Fe-B, and stator permanent magnet 4 all adopts radial magnetizing with rotor permanent magnet 2, and stator permanent magnet 4 is opposite in the polarity of air gap both sides with rotor permanent magnet 2.
Rotor permanent magnet 2 number of pole-pairs n
r=27, three phase windings 6 number of pole-pairs n
p=4.
The material of stator core 8 and mover iron core 1 is silicon steel sheet.
The present invention is that a kind of novel direct drive seawave power generation based on magnetic field modulation is used the cursor type linear electric motors, and it comprises that motor is long elementary short secondary with motor.Long elementary columned stator core 8, three phase windings 6, the stator permanent magnet 4 of comprising of motor; Short secondary mover iron core 1 cylindraceous, the rotor permanent magnet 2 of comprising of motor.Stator core 8 adopts the open slot structure; Stator permanent magnet 4 is evenly distributed between two stator tooths 5; Three phase windings 6 embed within the stator slot 7 of stator core 8; Rotor permanent magnet 2 is even vertically, the compartment of terrain embeds on mover iron core 1, and the mover iron core is fixed in the floating drum 9, and floating drum swims on the sea 10.
Described elementary three-phase stator winding 6 adopts distributed winding, reduces the induced electromotive force harmonic content.
Described single air gap both sides permanent magnet material is rare-earth Nd-Fe-B, and every permanent magnet all adopts radial magnetizing, and rotor permanent magnet 2 is opposite in the polarity of air gap both sides with stator permanent magnet 4.
Adjustable magnetic ring in stator iron core tooth 5 and the stator core slot 7 combination replacement magnetic gears carries out magnetic field modulation, and will satisfy the elementary stator tooth number n of weak point that equal length is L
sBe long secondary rotor permanent magnet number of pole-pairs n
rWith short elementary armature winding number of pole-pairs n
pSum, the present invention presses n
r=27, n
p=4 parameter designs.When wave promotes floating drum with speed v
1During rectilinear motion, produce speed v up and down
1The low speed travelling-magnetic-field, after the adjustable magnetic effect through stator tooth, formation speed is 6.75v in the stator teeth groove
1The High Speed Modulation travelling-magnetic-field, send electric energy behind the cutting stator armature winding.
The above is merely preferred embodiments of the present invention; Protection scope of the present invention is not exceeded with above-mentioned execution mode; As long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection range of putting down in writing in claims.
Claims (6)
1. one kind is directly driven seawave power generation and uses the cursor type linear electric motors, it is characterized in that: this motor comprises that motor is long elementary short secondary with motor;
The long elementary stator tooth (5) that comprises stator core (8), three phase windings (6), the stator permanent magnet (4) of stator and be arranged on the stator periphery of motor; Stator core (8) adopts the open slot structure, i.e. offer stator slot (7) in the stator core (8); Stator permanent magnet (4) is distributed between adjacent two stator tooths (5), and three phase windings (6) embed within the stator slot (7) of stator core (8);
The short secondary mover iron core (1) that comprises mover of motor, rotor permanent magnet (2); Rotor permanent magnet (2) axially spaced-apart and embedding equidistantly on mover iron core (1), mover cylindrical shape iron core (1) is fixed in the floating drum (9), and floating drum (9) swims on the sea (10).
2. the seawave power generation that directly drives according to claim 1 is used the cursor type linear electric motors, it is characterized in that: between stator core (8) and the mover iron core (1) air gap (3) is arranged.
3. the seawave power generation that directly drives according to claim 2 is used the cursor type linear electric motors; It is characterized in that: stator permanent magnet (4) material and rotor permanent magnet (2) material are the permanent magnetic material rare-earth Nd-Fe-B; Stator permanent magnet (4) and rotor permanent magnet (2) all adopt radial magnetizing, and stator permanent magnet (4) is opposite in the polarity of air gap both sides with rotor permanent magnet (2).
4. the seawave power generation that directly drives according to claim 1 is used the cursor type linear electric motors; It is characterized in that: stator tooth (5) is used to carry out magnetic field modulation with stator slot (7) combination, satisfies the stator tooth that equal length is L (5) number
and is rotor permanent magnet (2) number of pole-pairs
and three phase windings (6) number of pole-pairs
sum.
5. the seawave power generation that directly drives according to claim 4 is used the cursor type linear electric motors; It is characterized in that: rotor permanent magnet (2) number of pole-pairs
, three phase windings (6) number of pole-pairs
.
6. the seawave power generation that directly drives according to claim 1 is used the cursor type linear electric motors, it is characterized in that: the material of stator core (8) and mover iron core (1) is silicon steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104440083A CN102437702A (en) | 2011-12-27 | 2011-12-27 | Vernier linear motor for direct-drive sea-wave power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104440083A CN102437702A (en) | 2011-12-27 | 2011-12-27 | Vernier linear motor for direct-drive sea-wave power generation |
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| Publication Number | Publication Date |
|---|---|
| CN102437702A true CN102437702A (en) | 2012-05-02 |
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ID=45985617
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|---|---|---|---|
| CN2011104440083A Pending CN102437702A (en) | 2011-12-27 | 2011-12-27 | Vernier linear motor for direct-drive sea-wave power generation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684341A (en) * | 2012-05-24 | 2012-09-19 | 东南大学 | Permanent-magnet wind-driven generator capable of realizing self-acceleration of magnetic field |
| CN104578672A (en) * | 2015-01-22 | 2015-04-29 | 东南大学 | Cylinder type speed-changing linear permanent magnet generator used for wave power generation |
| CN108880182A (en) * | 2018-07-16 | 2018-11-23 | 华中科技大学 | A kind of division tooth modularization vernier permanent-magnetism linear motor |
| WO2019147599A1 (en) * | 2018-01-24 | 2019-08-01 | Dehlsen Associates, Llc | Power take-off for a wave energy converter |
| CN112532010A (en) * | 2020-11-13 | 2021-03-19 | 江苏科技大学 | Direct-drive permanent magnet linear generator for wave power generation |
| CN113300508A (en) * | 2021-06-07 | 2021-08-24 | 重庆理工大学 | Stable power generation device of variable-speed rotating shaft |
| EP3887669A4 (en) * | 2019-01-21 | 2023-01-04 | Dehlsen Associates, LLC | A vernier permanent magnet linear generator |
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| JPH06121504A (en) * | 1992-10-07 | 1994-04-28 | Meidensha Corp | Pm type vernier motor |
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| CN102082490A (en) * | 2011-01-26 | 2011-06-01 | 东南大学 | High-thrust permanent magnet direct drive linear electric motor |
| CN202503419U (en) * | 2011-12-27 | 2012-10-24 | 东南大学 | Vernier-type linear motor for direct-drive wave power generation |
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2011
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684341A (en) * | 2012-05-24 | 2012-09-19 | 东南大学 | Permanent-magnet wind-driven generator capable of realizing self-acceleration of magnetic field |
| CN104578672A (en) * | 2015-01-22 | 2015-04-29 | 东南大学 | Cylinder type speed-changing linear permanent magnet generator used for wave power generation |
| WO2019147599A1 (en) * | 2018-01-24 | 2019-08-01 | Dehlsen Associates, Llc | Power take-off for a wave energy converter |
| US10865763B2 (en) | 2018-01-24 | 2020-12-15 | Dehlsen Associates, Llc | Power take-off for a wave energy converter |
| EP3743619A4 (en) * | 2018-01-24 | 2021-06-23 | Dehlsen Associates, LLC | Power take-off for a wave energy converter |
| CN108880182A (en) * | 2018-07-16 | 2018-11-23 | 华中科技大学 | A kind of division tooth modularization vernier permanent-magnetism linear motor |
| CN108880182B (en) * | 2018-07-16 | 2021-01-19 | 华中科技大学 | Split-tooth modular vernier permanent magnet linear motor |
| EP3887669A4 (en) * | 2019-01-21 | 2023-01-04 | Dehlsen Associates, LLC | A vernier permanent magnet linear generator |
| CN112532010A (en) * | 2020-11-13 | 2021-03-19 | 江苏科技大学 | Direct-drive permanent magnet linear generator for wave power generation |
| CN113300508A (en) * | 2021-06-07 | 2021-08-24 | 重庆理工大学 | Stable power generation device of variable-speed rotating shaft |
| CN113300508B (en) * | 2021-06-07 | 2022-09-27 | 重庆理工大学 | Stable power generation device of variable-speed rotating shaft |
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Application publication date: 20120502 |