CN104578672A - Cylinder type speed-changing linear permanent magnet generator used for wave power generation - Google Patents

Cylinder type speed-changing linear permanent magnet generator used for wave power generation Download PDF

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Publication number
CN104578672A
CN104578672A CN201510033550.8A CN201510033550A CN104578672A CN 104578672 A CN104578672 A CN 104578672A CN 201510033550 A CN201510033550 A CN 201510033550A CN 104578672 A CN104578672 A CN 104578672A
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China
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speed
mover
stator
permanent
magnet generator
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CN201510033550.8A
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余海涛
封宁君
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Southeast University
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Southeast University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

Abstract

The invention discloses a cylinder type speed-changing linear permanent magnet generator used for wave power generation. The cylinder type speed-changing linear permanent magnet generator comprises a high speed rotor, a low speed rotor and a motor stator, wherein the high speed rotor, the low speed rotor and the motor stator are of a cylinder structure and arranged from outside to inside in a sleeving mode. A first air gap is formed between the high speed rotor and the low speed rotor. A second air gap is formed between the low speed rotor and the motor stator. The high speed rotor comprises a high speed rotor iron core. The inner surface of the high speed rotor iron core is provided with high speed permanent magnet pole pieces in a surface-adhering or embedding mode. The low speed rotor comprises magnetizers and non-magnetizers, wherein the magnetizers and the non-magnetizers are arranged at intervals in the axial direction in a staggered mode. The motor stator comprises a stator iron core. A stator iron core gear groove of the outer surface of the stator iron core is provided with stator coils in an embedded mode. The outer surfaces of the stator coils are provided with stator permanent magnet pole pieces in a surface-adhering mode. By means of cylinder type speed-changing linear permanent magnet generator, additional large-sized speeders are not needed to arrange in a whole wave power generation system, the volume is small, and the power capturing and power generating efficiency is high.

Description

For the drum type brake speed change linear permanent-magnet generator of wave power generation
Technical field
The present invention relates to a kind of drum type brake speed change linear permanent-magnet generator for wave power generation, belong to wave power generation technology.
Background technology
On the earth, the area of 70.8% is covered by ocean.Oceanic energy is a kind of regenerative resource, for the need for electricity that the whole world is growing, have huge exploitation potential.Traditional rotary-type electricity generation system inevitably needs complicated mechanical device, and the such as hydraulic turbine or hydraulic pump, change the wave motion of linear reciprocating into rotary motion, thus drives electric rotating machine to send electric energy.Owing to have employed intermediate conversion device, rotating power generation system has following problems: General Maintenance, poor efficiency, low power density, high cost.
Linear permanent-magnet electricity generation system then directly utilizes wave motion, eliminates huge straight line---rotary actuator and consequent power loss.But wave motion speed is low, direct-drive type linear electric generator needs to adopt low speed design, can increase electricity generation system R&D costs, also increase the difficulty of device fabrication and installation.In order to reduce cost of electricity-generating, must manage to improve the speed caused by wave, driving high-speed LEM generating.
Summary of the invention
Goal of the invention: in order to overcome the shortcoming that direct-drive type linear permanent-magnet generator volume is large, power density is low, cost is high, the present invention proposes a kind of drum type brake speed change linear permanent-magnet generator, magnetic gear and linear permanent-magnet generator are carried out magnetic circuit and organically blending mechanically, improve the speed caused by wave, drive the generating of high-speed straight-line permanent magnet generator, thus significant increase power density and efficiency.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of drum type brake speed change linear permanent-magnet generator for wave power generation, that comprise cylindrical structure, sheathed successively from outside to inside high speed mover, low speed mover and motor stator, form the first air gap between high speed mover and low speed mover, between low speed mover and motor stator, form interstice; Described high speed mover comprises high speed mover core, and at high speed mover core inner surface Surface Mount or be embedded with high-speed permanent magnetic pole piece, all high-speed permanent magnetic pole pieces form staggered N magnetic pole circle and S magnetic pole circle vertically; Described low speed mover comprises staggered spaced magnetic conductor and non-magnetizer vertically; Described motor stator comprises stator core, and be equipped with stator winding the stator core teeth groove of stator core outer surface is embedded, have stator permanent magnet pole piece at stator winding outer surface Surface Mount, all stator permanent magnet pole pieces form staggered N magnetic pole circle and S magnetic pole circle vertically.
Magnetic gear and linear permanent-magnet generator are carried out the coupling of magnetic circuit and machinery by above-mentioned drum type brake speed change linear permanent-magnet generator, high speed mover, low speed mover and motor stator all have dual-use function, be specially: high speed mover had both served as the high-speed moving part in magnetic gear, simultaneously also as secondary (mover) of linear permanent-magnet generator; Motor stator serves as the more armature of magnetic pole logarithm in magnetic gear, simultaneously also as elementary (stator) of linear permanent-magnet generator; Low speed mover had both served as the moving component that wave energy transforms, and can modulate again as adjustable magnetic ring to the magnetic field that high-speed permanent magnetic pole piece and stator permanent magnet pole piece produce; Produce relative motion, cutting magnetic line between the magnetic field produced in high-speed permanent magnetic pole piece movement process and motor stator winding, produce induced electromotive force, complete the process that wave energy is changed to electric energy.
This drum type brake speed change linear permanent-magnet generator is used in wave electric power system, the low speed mover be connected with floating drum follows wave with low cruise, under the function of magnetic gear graduation, the high speed mover that permanent-magnet pole logarithm is few runs at high speed according to speed ratio, drives permanent magnet linear motor to send electric energy.Whole wave electric power system do not need the huge speeder of additional, small volume, catch can and generating efficiency high.
Concrete, the movement velocity of described high speed mover and low speed mover meets the gearratio of magnetic gear, and high speed mover is identical with the direction of motion of low speed mover, and motor stator keeps fixing.
Concrete, described motor stator adopts epoxy sealing, and high speed mover core, stator core and magnetic conductor adopt silicon steel plate stacking to form, and stator winding adopts the form of three-phase concentratred winding.
Concrete, the permanent magnetism magnetic pole logarithm of described high speed mover is N 1, the permanent magnetism magnetic pole logarithm of motor stator is N 2, the magnetic conduction body piece number of low speed mover is N s=N 1+ N 2, wherein N 1and N 2for natural number, and N 1<N 2.
Concrete, the mode of magnetizing of the permanent magnet in this drum type brake speed change linear permanent-magnet generator is that radial magnetizing and Halbach magnetize.
Concrete, low speed mover is laminated by magnetic conduction sheet material and forms matrix, perpendicular to axial direction, on matrix, uniform intervals is provided with groove, and the non-magnetizer of low speed mover is arranged in groove, and the bulk portion between adjacent non-magnetizer forms the magnetic conductor of low speed mover; The material of the magnetic conductor of low speed mover is epoxy resin or polyformaldehyde.
This drum type brake speed change linear permanent-magnet generator, adopt outer Structure of mover (namely generator three arrangements of components is followed successively by motor stator-low speed mover-high speed mover from the inside to the outside), compared with interior Structure of mover (namely generator three parts are followed successively by high speed mover-low speed mover-motor stator from the inside to the outside), higher power density can be provided.
Beneficial effect: the drum type brake speed change linear permanent-magnet generator for wave power generation provided by the invention, relative to prior art, there is following advantage:
1, drum type brake speed change linear permanent-magnet generator being coupled by magnetic gear and permanent magnet linear motor, effectively make use of the advantage of the two.Magnetic gear has untouchable feature, has the advantage such as physical insulation and intrinsic overload protection between mechanical wearing and tearing, low noise, movable part.Linear permanent-magnet generator directly utilizes wave motion, and do not need to be first rotate the intermediate conversion device driving rotary generator again by the transform linear motion of wave, consequent power loss also disappears thereupon.
2, the low speed mover of drum type brake speed change linear permanent-magnet generator and floating drum are connected as a single entity, can move by direct capture low-speed waves, the high-speed straight-line permanent magnet generator design by magnetic gear graduation functional realiey, overcome due to the low shortcoming of lower the caused power density of the speed of wave own, reduce generator volume, reduce manufacturing cost.
3, compared to traditional wave energy generating set based on electric rotating machine, drum type brake speed change linear permanent-magnet generator can directly utilize the linear reciprocating motion of wave to be translated into electric energy, eliminate huge straight line---rotate intermediate conversion device, structure is simple, substantially reduce the complexity of system, conversion efficiency is high, thus improves the generating efficiency of whole electricity generation system.
4, drum type brake speed change linear permanent-magnet generator adopts outer Structure of mover, and compared with interior Structure of mover, the outer Structure of mover that the present invention proposes can provide higher power density.
Accompanying drawing explanation
Fig. 1 is drum type brake speed change linear permanent-magnet generator schematic diagram;
Fig. 2 is drum type brake speed change linear permanent-magnet generator structure chart.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
On the basis that straight line magnetic gear and linear permanent magnet synchronous motor operation principle are analysed in depth, coupling in magnetic circuit and mechanical structure is carried out to the two, obtain being illustrated in figure 1 a kind of drum type brake speed change linear permanent-magnet generator, be specially: that comprise cylindrical structure, sheathed successively from outside to inside high speed mover 1, low speed mover 2 and motor stator 3, form the first air gap between high speed mover 1 and low speed mover 2, between low speed mover 2 and motor stator 3, form interstice; Described high speed mover 1 comprises high speed mover core 11, and at high speed mover core 11 inner surface Surface Mount or be embedded with high-speed permanent magnetic pole piece 12, all high-speed permanent magnetic pole pieces 12 form staggered N magnetic pole circle and S magnetic pole circle vertically; Described low speed mover 2 comprises staggered spaced magnetic conductor 21 and non-magnetizer 22 vertically; Described motor stator 3 comprises stator core 31, be equipped with stator winding 32 the stator core teeth groove of stator core 31 outer surface is embedded, have stator permanent magnet pole piece 33 at stator winding 32 outer surface Surface Mount, all stator permanent magnet pole pieces 33 form staggered N magnetic pole circle and S magnetic pole circle vertically.
Straight line magnetic high-speed gear mover and permanent magnet linear motor secondary (mover) are integrated; Drum type brake speed change linear permanent-magnet generator stator is equivalent to the more armature of magnetic pole logarithm in magnetic gear, is also the stator (elementary) of linear permanent-magnet generator simultaneously; The low speed mover of drum type brake speed change linear permanent-magnet generator had both served as the moving component of wave energy conversion, had also served as the effect of adjustable magnetic ring in magnetic gear, can modulate the magnetic field that high speed mover and stator permanent magnet produce.
Described motor stator 3 adopts epoxy sealing, and high speed mover core 11, stator core 31 and magnetic conductor 21 adopt silicon steel plate stacking to form, and stator winding 32 adopts the form of three-phase concentratred winding.
Low speed mover 2 comprises being laminated by magnetic conduction sheet material and forms matrix, perpendicular to axial direction, on matrix, uniform intervals is provided with groove, the non-magnetizer 22 of low speed mover is arranged in groove, and the bulk portion between adjacent non-magnetizer 22 forms the magnetic conductor 21 of low speed mover; The material of low speed mover non-magnetizer 22 is epoxy resin or polyformaldehyde.
The core realizing movement velocity conversion in drum type brake speed change linear permanent-magnet generator is exactly straight line magnetic gear.Straight line magnetic gear is made up of three parts, the armature having different permanent-magnet pole logarithm respectively and the adjustable magnetic ring modulated the magnetic field that armature permanent magnetism produces.Usually, the armature that in magnetic gear, permanent-magnet pole logarithm is few is that (magnetic pole logarithm is N to high speed mover 1), if (magnetic pole logarithm is N to the armature that permanent-magnet pole logarithm is many 2) keeping fixing, then thrust is passed to adjustable magnetic ring, and adjustable magnetic ring will become low-speed motion parts, and adjustable magnetic ring magnetic conduction body piece number is N s, meet between three: N s=N 1+ N 2, wherein N 1and N 2for natural number, and N 1<N 2.Under this kind of motor pattern, between magnetic high-speed gear and low speed mover, gearratio is G r=N s/ N 1.According to the actual requirements, appropriate design can be carried out to high, low speed rotor permanent magnet number of pole-pairs.
The movement velocity of described high speed mover 1 and low speed mover 2 meets the gearratio of magnetic gear, and high speed mover 1 is identical with the direction of motion of low speed mover 2, and motor stator keeps fixing.The mode of magnetizing of the permanent magnet in this drum type brake speed change linear permanent-magnet generator is that radial magnetizing and Halbach magnetize.
The operation principle of drum type brake speed change linear permanent-magnet generator is: speed change linear permanent-magnet generator is the composite construction of magnetic gear and permanent magnetic linear synchronous motor, the low-speed motion parts of floating drum and generator connect as one, thus obtain wave energy to greatest extent, under wave action, floating drum drives low-speed motion parts to follow wave and moves up and down, by the speed changing function of magnetic gear, realize the speedup object of linear permanent-magnet generator secondary (high speed mover), high speed mover pumps, thus and produce relative motion between motor stator winding, cutting magnetic line, produce induced electromotive force, complete the process that wave energy is changed to electric energy.
In brief, the low speed reciprocating motion of wave is by after low speed mover direct capture, and after magnetic gear ratio is amplified, high speed mover goes to drive generator, produces higher output voltage thus, provides higher power density and efficiency.Magnetic gear technique is adopted to realize the energy transferring of direct-drive wave power generation system, the transformation of low speed to high-speed drive can be realized, when do not increase even reduce system bulk, improve that direct-drive wave power generation system power density is low, electromagnetic force fluctuates large shortcoming, greatly reduce wave power generation cost.Because wave has randomness, lasting electric energy is provided in order to give the marine power consumption equipments such as oceanographic observation equipment, the form of general employing battery energy storage, the three-phase alternating current that generator produces after filtering, rectification, accumulators charges after inversion, then powered to power consumption equipment by storage battery.
Based on the thought of this case, speed change linear permanent-magnet generator adopts cylindrical structure, as shown in Figure 2.Compare with slab construction, cylindrical structure has a lot of advantage: space availability ratio is high, leakage field is few, force density is high, boundless end winding, without being applied to radial load on bearing.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (5)

1. the drum type brake speed change linear permanent-magnet generator for wave power generation, it is characterized in that: that comprise cylindrical structure, sheathed successively from outside to inside high speed mover (1), low speed mover (2) and motor stator (3), form the first air gap between high speed mover (1) and low speed mover (2), between low speed mover (2) and motor stator (3), form interstice;
Described high speed mover (1) comprises high speed mover core (11), at high speed mover core (11) inner surface Surface Mount or be embedded with high-speed permanent magnetic pole piece (12), all high-speed permanent magnetic pole pieces (12) form staggered N magnetic pole circle and S magnetic pole circle vertically;
Described low speed mover (2) comprises staggered spaced magnetic conductor (21) and non-magnetizer (22) vertically;
Described motor stator (3) comprises stator core (31), be equipped with stator winding (32) the stator core teeth groove of stator core (31) outer surface is embedded, have stator permanent magnet pole piece (33) at stator winding (32) outer surface Surface Mount, all stator permanent magnet pole pieces (33) form staggered N magnetic pole circle and S magnetic pole circle vertically.
2. the drum type brake speed change linear permanent-magnet generator for wave power generation according to claim 1, it is characterized in that: the movement velocity of described high speed mover (1) and low speed mover (2) meets the gearratio of magnetic gear, and high speed mover (1) is identical with the direction of motion of low speed mover (2), motor stator keeps fixing.
3. the drum type brake speed change linear permanent-magnet generator for wave power generation according to claim 1, it is characterized in that: described motor stator (3) adopts epoxy sealing, high speed mover core (11), stator core (31) and magnetic conductor (21) adopt silicon steel plate stacking to form, and stator winding (32) adopts the form of three-phase concentratred winding.
4. the drum type brake speed change linear permanent-magnet generator for wave power generation according to claim 1, is characterized in that: the permanent magnetism magnetic pole logarithm of described high speed mover (1) is N 1, the permanent magnetism magnetic pole logarithm of motor stator (3) is N 2, magnetic conductor (21) the sheet number of low speed mover (2) is N s=N 1+ N 2, wherein N 1and N 2for natural number, and N 1<N 2.
5. the drum type brake speed change linear permanent-magnet generator for wave power generation according to claim 1, is characterized in that: the mode of magnetizing of the permanent magnet in this drum type brake speed change linear permanent-magnet generator is that radial magnetizing and Halbach magnetize.
CN201510033550.8A 2015-01-22 2015-01-22 Cylinder type speed-changing linear permanent magnet generator used for wave power generation Pending CN104578672A (en)

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Publication number Priority date Publication date Assignee Title
CN104895731A (en) * 2015-06-24 2015-09-09 电子科技大学 Sea wave driven generator having composite rotary wind power generation function
CN106050537A (en) * 2016-05-04 2016-10-26 中国科学院电工研究所 Wave energy power generation device
CN106351781A (en) * 2016-09-14 2017-01-25 东南大学 Underwater vehicle induction charging system based on sea wave-luminous energy hybrid generation
CN106640505A (en) * 2017-01-03 2017-05-10 江苏理工学院 Wave power generation system based on tubular type permanent-magnet linear generator
CN106849572A (en) * 2017-03-30 2017-06-13 哈尔滨工业大学 The plate linear electric generator of double acting sub- double winding based on unilateral Excitation principle
CN106849573A (en) * 2017-03-30 2017-06-13 哈尔滨工业大学 Double acting sub- double winding cylindrical linear generator based on magnetic field modulation principle
CN106899194A (en) * 2017-03-31 2017-06-27 东南大学 Energy by ocean current integrated generating device based on Flux modulation compound machine
CN106958589A (en) * 2017-04-20 2017-07-18 北京航空航天大学 Halbach permanent magnetism passive type axial magnetic suspension bearings with damping action
CN107070161A (en) * 2017-03-30 2017-08-18 哈尔滨工业大学 The double acting sub- plate linear electric generator of double winding based on magnetic field modulation principle
WO2019071919A1 (en) * 2017-10-13 2019-04-18 冯树乡 Straight stator excitation generator utilizing belt drive
CN111577518A (en) * 2020-05-27 2020-08-25 南京信息工程大学 Floating type wave power generation device
WO2020180234A1 (en) * 2019-03-04 2020-09-10 Hagnesia Ab Azimuthal or polodial flux machines

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104895731A (en) * 2015-06-24 2015-09-09 电子科技大学 Sea wave driven generator having composite rotary wind power generation function
CN106050537A (en) * 2016-05-04 2016-10-26 中国科学院电工研究所 Wave energy power generation device
CN106050537B (en) * 2016-05-04 2018-08-14 中国科学院电工研究所 A kind of wave energy generating set
CN106351781A (en) * 2016-09-14 2017-01-25 东南大学 Underwater vehicle induction charging system based on sea wave-luminous energy hybrid generation
CN106351781B (en) * 2016-09-14 2018-08-28 东南大学 A kind of submarine navigation device inductive charging system based on wave-light energy complementary power generation
CN106640505A (en) * 2017-01-03 2017-05-10 江苏理工学院 Wave power generation system based on tubular type permanent-magnet linear generator
CN106849572B (en) * 2017-03-30 2019-11-05 哈尔滨工业大学 The double acting sub- plate linear electric generator of double winding based on unilateral Excitation principle
CN107070161B (en) * 2017-03-30 2020-01-14 哈尔滨工业大学 Double-mover double-winding plate type linear generator based on magnetic field modulation principle
CN107070161A (en) * 2017-03-30 2017-08-18 哈尔滨工业大学 The double acting sub- plate linear electric generator of double winding based on magnetic field modulation principle
CN106849573A (en) * 2017-03-30 2017-06-13 哈尔滨工业大学 Double acting sub- double winding cylindrical linear generator based on magnetic field modulation principle
CN106849572A (en) * 2017-03-30 2017-06-13 哈尔滨工业大学 The plate linear electric generator of double acting sub- double winding based on unilateral Excitation principle
CN106849573B (en) * 2017-03-30 2020-07-24 哈尔滨工业大学 Double-rotor double-winding cylindrical linear generator based on magnetic field modulation principle
CN106899194A (en) * 2017-03-31 2017-06-27 东南大学 Energy by ocean current integrated generating device based on Flux modulation compound machine
CN106958589A (en) * 2017-04-20 2017-07-18 北京航空航天大学 Halbach permanent magnetism passive type axial magnetic suspension bearings with damping action
WO2019071919A1 (en) * 2017-10-13 2019-04-18 冯树乡 Straight stator excitation generator utilizing belt drive
WO2020180234A1 (en) * 2019-03-04 2020-09-10 Hagnesia Ab Azimuthal or polodial flux machines
CN111577518A (en) * 2020-05-27 2020-08-25 南京信息工程大学 Floating type wave power generation device
CN111577518B (en) * 2020-05-27 2021-03-26 南京信息工程大学 Floating type wave power generation device

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Application publication date: 20150429