CN104578634B - A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator - Google Patents
A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator Download PDFInfo
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- CN104578634B CN104578634B CN201510057751.1A CN201510057751A CN104578634B CN 104578634 B CN104578634 B CN 104578634B CN 201510057751 A CN201510057751 A CN 201510057751A CN 104578634 B CN104578634 B CN 104578634B
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- permanent magnet
- stator
- iron
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- rotor
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- 230000004907 flux Effects 0.000 title claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 38
- 235000013351 cheese Nutrition 0.000 claims abstract description 7
- 230000005389 magnetism Effects 0.000 claims 2
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000004899 motility Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 206010002583 Anodontia Diseases 0.000 description 2
- 241001014327 Anodontia Species 0.000 description 2
- 230000005212 anodontia Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 210000004508 polar body Anatomy 0.000 description 1
- 230000000630 rising Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
Abstract
The invention discloses a kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator, including main shaft, rotor and stator, rotor contains two rotor disks for being symmetrically distributed in stator both sides, permanent magnet is equipped with towards stator on the inside of rotor disk, permanent magnet is shaped as cutting cheese or track type containing magnetic pole angle of different sizes with cambered surface, and adjacent permanent magnet along the circumferential direction is different with along the relative permanent magnet pole embrace of major axes orientation.Stator includes that stator coil winding and its support member, stator are rhombus or taper, iron-free cored structure using the centralized winding of the monolayer for not overlapping three-phase symmetrical, coil shape.Alternative traditional radial flux of the invention and the electromotor of cored structure, structure compared is simple, start light, generating efficiency and quality are high, noise is little, it is highly suitable for miniature direct-drive formula vertical axis wind power generation system, can be widely applied to city, pastoral area, island, fishing boat etc. and require that generating equipment movement motility is good, the higher occasion of power generating quality and efficiency.
Description
Technical field
The present invention relates to a kind of wind-driven generator, and in particular to a kind of stator iron-core-free double air gaps axial flux permanent magnet sensing
Wind-driven generator.
Background technology
At present, small-sized wind power generator mainly has two kinds of forms of radial and axial magnetic flux, and axial magnetic flux electric generator structure is tight
Gather, torque density is big, and axial length is short, is readily designed to multipolar dynamo；Additionally, stator design is into iron-free cored structure, can disappear
Except the impact of cogging torque power in generator operation, reduce magnetic hysteresis and eddy-current loss, reduce electromotor incision wind speed, can run
In the range of larger wind speed, it is suitable for the directly-driving wind power generation system without step-up gear, improves the reliability of wind generator system
Property.
Small-sized wind power generator requires that motor incision wind speed is low, and rotary inertia is big, can realize breeze wind；Generating efficiency
Height, is lost little；Power generating quality is high, and harmonic content is low；Lightweight, small volume, stock utilization are high, and compact conformation is simple.
The domestic at present iron-core-free axial flux permanent magnet electromotor to this high quality of power supply output is very much rare, such as China
Axial-flux electric machine involved by patent of invention CN 103887909A, stator winding are cored, its structure and both at home and abroad related reason
Consistent by research, as its starting torque is dynamic big, under mild wind, starting-generating is difficult, while the quality of power supply is also difficult to ensure that, uncomfortable
For small-size wind power-generating field.
Content of the invention
It is an object of the invention to provide a kind of energy breeze start-up generates electricity, power generating quality is high, operation is light and handy stablizing, structure letter
Single compact double air gaps axial flux permanent magnet wind-driven generator.
The technical solution used in the present invention is：The iron-core-free double air gaps axial flux permanent magnet wind-driven generator, including main shaft,
Rotor and stator, the stator are fixedly connected the main shaft, and the rotor is symmetrically distributed in turning for the stator both sides containing two
Sub-disk, is equipped with permanent magnet towards the stator on the inside of the rotor disk, and rotor disk is bearing on the main shaft, is characterized in,
The permanent magnet be shaped as pole embrace do not wait while surface circular arc raised cut cheese or track type.
The following is the relevant technological means in some preferred versions.
Along the multiple permanent magnets of the rotor disk circumferential directions, uniform alternating places N poles and S polar bodys to the permanent magnet,
And adjacent permanent magnet along the circumferential direction is different with along the relative permanent magnet pole embrace of major axes orientation, pole embrace is taken respectively
0.7 and 0.8.
Further, the permanent magnet first type surface is in plane, and in rotor disk face, another side on the other side is in circular arc
Projection, the axially opposed arrangement of circular arc crowning.
Further, the permanent magnet total number is the even number more than 40, magnetizes vertically.
The stator includes stator coil winding and its support member being fixed together, and the stator winding coil is by propping up
Support member is fixedly connected with the main shaft, and the stator winding coil is through epoxy resin injection molding.
The stator winding is shaped as rhombus or taper, iron-free using the centralized winding of the monolayer for not overlapping three-phase symmetrical
Core and tooth slot structure.
Further, the coil electric angle of the stator coil winding can be with scope 220-260 ° of value, its coil number
Sum is the positive integer that can be divided exactly by 3.
The main shaft is hollow spindle.The hollow spindle is provided with the aperture of the stator coil winding leading-out wire.
Compared with existing axial magnetic flux electromotor, patent of the present invention has the following advantages：
1st, the axial flux permanent magnet electromotor shown in the present invention, using have circular arc raised cut cheese or track type permanent magnet
Shape, high with the electromotor output quality of power supply, harmonic content is low, and waveform sine is good, the high advantage of permanent magnet material utilization rate,
Simultaneously using the rhombus or tape winding with permanent magnet form fit, can effectively reduce end turn length and copper loss, carry
High generating efficiency；
2nd, the permanent magnet arrangement that the present invention is adopted, with leakage field is reduced, saves permanent magnet material, reduces torque ripple
The characteristics of；
3rd, the present invention is shaped as rhombus or taper using the centralized winding of the monolayer for not overlapping three-phase symmetrical, iron-core-free and
The stator component structure of teeth groove, the stator is almost without magnetic hysteresis and eddy-current loss, while avoid when wind-driven generator is started needing
The impact of cogging torque power, anodontia slot structure is overcome to cause coil winding more freedom and flexibility, save the constraint of slot form,
Motor rotation is more brisk, can accomplish that low speed even Ultra-Low Speed starts the target for generating electricity, improve wind energy utilization；
4th, multiple coils are coupled together and are fabricated to stator winding by the present invention in a certain order, through epoxy resin pair
Its injection molding, will be close-coupled processing to stator winding and support member so as to be fixed on main shaft, it is ensured that motor is continually and steadily transported
Be not in vibration and big noise during row.
Summary advantage, the main axial flux permanent magnet motor of the present invention can substitute traditional radial flux and cored
The electromotor of structure, structure compared are simple, and startup is light, and generating efficiency and quality are high, and noise is little, is highly suitable for miniature direct-drive
Formula vertical major wind generator system, can be widely applied to city, pastoral area, island, fishing boat etc. and requires generating equipment movement flexibly
Good, the higher occasion of power generating quality and efficiency of property.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is a kind of schematic diagram for cutting cheese permanent magnet；
Fig. 3 is sectional views of the Fig. 2 along A-A；
Fig. 4 is the arrangement schematic diagram of rotor disk permanent magnet；
Fig. 5 is stator coil winding schematic shapes；
Tu6Shi stator coils winding layout schematic diagram.
Each label in figure：1st, hollow spindle, 2, bearing (ball) cover, 3, upper rotor part disk, 4, bolt, 5, bearing, 6, stator coil
Winding support, 7, permanent magnet, 8, stator coil winding, 9, casing, 10, lower rotor part disk, 11, through wires hole, 12, winding draws
Line.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further：
As shown in figure 1, the stator iron-core-free main shaft is to magnetic flux permanent magnet generator, including main shaft, rotor and stator.Described fixed
Son is fixed on the main shaft, and the rotor contains two rotor disks, and rotor disk is placed in stator both sides, is connected with the spindle mobility
Connect.
The main shaft adopts hollow spindle 1.
The rotor includes upper and lower two rotor disks 3 and 10, and the permanent magnet 7 on rotor disk 3 and 10 up and down, rotor around
Its hollow spindle 1 for supporting rotates, and hollow spindle 1 is support member, and relative rotor does not rotate.Rotor disk 3,10 passes through six up and down
Bolt 4 is fixed on electric generator casing 9, i.e. rotor disk 3,10 and permanent magnet 7 and casing composition rotary part.
The permanent magnet 7 of two kind different magnetic poles angles is correspondingly arranged on upper and lower two rotor disk 3 and 10 respectively, and along hollow master
There is certain air gap distance between the winding coil of stator described in 1 axially facing of axle, permanent magnet and the stator, in rotor disk
The N pole and S pole of permanent magnet 7 is along the circumferential direction alternately placed in side（As shown in Figure 4）, and make on rotor disk 3 and 10 along main shaft to
The face opposite polarity of two pieces of relative permanent magnets, i.e. both magnetizing directions along main shaft to conversely, one one down upward,
The pole embrace of the two is also differed simultaneously, while being similar to along main shaft therewith to distribution, i.e. along the circumferential direction go up, adjacent
Two pieces of permanent magnet magnetizing directions are conversely, pole embrace.
The magnetic pole logarithm of the rotor disk is the positive integer more than 10, that is to say, that on each rotor disk, permanent magnet number is
20 more, and permanent magnet number=magnetic pole logarithm × 2 on a rotor disk, the electromotor pole embrace are taken between 0.7-0.8
Arbitrary Digit, then permanent magnet pole angle=pole embrace × magnetic pole logarithm/180, adjacent on special rotor disk 3 and 10 up and down and
The pole embrace of two pieces of relative permanent magnets is different, that is, magnetic pole angle is different, i.e., magnetic pole angle one is big, and one is little, this
Two groups of pole embraces of invention are 0.7 and 0.8 respectively.
As shown in Figure 2,3,7 shape of permanent magnet is to cut cheese, cuts cheese permanent magnet and is cut into tool similar to by circular permanent magnet
There is the shape of certain magnetic pole angle；7 shape of permanent magnet can also be track type, and track type permanent magnet is by permanent magnet straight line portion
There is level to repack the shape of magnetic pole angle into.It is preferred that the purpose of 7 shape of the permanent magnet is, permanent magnet material is made full use of
Material, reaches the purpose for improving permanent magnet utilization rate.Particularly, 7 first type surface of permanent magnet is in plane, in rotor disk face, with
Relative another side be designed to circular arc towards the one side of coil raised, the axially opposed arrangement of circular arc crowning, its convexity
The circular arc main shaft for rising is overlapped with 7 main shaft of permanent magnet, and preferably circular arc bulge-structure purpose is to improve power generator air gap sine
Distribution Characteristic of Magnetic Field so that air-gap field is close to sineization, ultimately facilitates reduction electromotor harmonic wave, improves electric energy output
Quality.
Rb-Fe-B material of 7 material of permanent magnet using high energy product.
On the whole in iron-core-free and tooth slot structure, iron-core-free causes motor almost without magnetic hysteresis and eddy-current loss, keeps away stator
The impact for needing to overcome cogging torque power when wind-driven generator is started is exempted from, anodontia slot structure causes coil winding more freely spirit
Living, save the constraint of slot form.
The stator includes stator coil winding 8 and stator support 6, winding coil injection molding is added through epoxy resin
Work, stator coil winding 8 and support member 6 are fixed together, on hollow spindle 1, the lead-out wire of wherein coil windings 8
12 apertures 11 on the hollow spindle 1 are drawn, and the stator relative rotor is static.In sum, stator coil winding 8,
Support member 6 and the composition stationary parts of hollow axle 1.
As shown in Figure 5,6, stator coil winding 8 is shaped as rhombus or taper, preferably iron-free cored structure, rhombus or taper
Coil shape purpose is that its shape is comparable to permanent magnet 7 so that corresponding with 7 circular arc portion of the permanent magnet coiler part is led
Body effectively, also can effective cutting magnetic line, induce electric energy, also reduce end turn length, relative reduces copper
Consumption, improves generating efficiency.
Using the concentratred winding for not overlapping three-phase symmetrical, coil count has motor number of pole-pairs and coil to stator coil winding 8
Angle determines, that is to say, that coil number=360 × magnetic pole logarithm/coil angle, particularly points out here, and coil angle is electric
Angle on-mechanical angle, electric angle=magnetic pole logarithm × 360, as θ p/ θ c>When 0.4（Such as Fig. 5, electricity consumption angle, θ c is represented here
Width of the coil at certain Radius）, coil angle takes 220-260 °, and coil angle involved in the present invention is according to maximum one group
Pole embrace is chosen, i.e., and 0.7 and 0.8, coil angle takes 240 ° of electrical angle.
The support member 6 of stator coil winding 8 extends out to the inner side of winding 8 from hollow spindle 1 along radial direction, supports
Part 6 is arranged in the middle of two rotor disks 3 and 10, i.e., in the centre of the arc surface of 7 projection of upper and lower permanent magnet, stator support 6 passes through
Interference fit is nested on hollow spindle 1, and with respect to the rotor remains stationary, the arc surface of permanent magnet is with stator coil surfaces most
Short distance is 0.5-2.0mm.
Base bearing part 5 is arranged on 1 outer surface of hollow spindle, and metal (upper 5 turns to being embedded in two respectively along main shaft
The interior hole portion of sub-disk 3 and 10, and equal with the distance between rotor disk 3 and 10, metal (upper 5 can make rotor around hollow spindle 1
Rotation, while support rotor weight and the load being applied on rotor, metal (upper 5 to be respectively equipped with sealing outward along main shaft
The main bearing end cover 2 of effect.
As described above, present configuration is simply compact, electric motor starting is spry and light, is highly suitable for gentle wind power generation system,
Have startup generating rotating speed low, generating efficiency and quality are high, and smooth running is lost low advantage.
It should be pointed out that being noted that without departing from the claims in the present invention for those skilled in the art
The protection domain that is asked, and without prejudice in the case of present inventive concept, equivalent can be made to the specific embodiment
Substitute or obvious modification, and some improvement or retouching.
Claims (6)
1. a kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator, including main shaft, rotor and stator, the stator is fixed
Connect the main shaft, the rotor contains two upper rotor part disks for being symmetrically distributed in the stator both sides（3）With lower rotor part disk（10）,
Rotor disk（3、10）Inner side is equipped with permanent magnet towards the stator（7）, rotor disk is bearing on the main shaft, and and electromotor
Casing（9）It is fixedly connected, it is characterised in that：Permanent magnet（7）It is shaped as containing pole embrace of different sizes and surface circular arc is raised
Cheese or track type is cut, and is along rotor disk（3、10）Multiple permanent magnets of circumferential directions, uniform alternately placement N poles and S
Pole, and adjacent permanent magnet along the circumferential direction is different with along the relative permanent magnet pole embrace of the major axes orientation, pole embrace
0.7 and 0.8 is taken respectively；
The stator includes stator coil winding（8）And its support member being fixed together（6）, stator coil winding（8）Pass through
Support member（6）It is fixedly connected with the main shaft；
Stator coil winding（8）Using the centralized winding of the monolayer for not overlapping three-phase symmetrical, rhombus or taper, iron-core-free is shaped as
And tooth slot structure.
2. the iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 1, it is characterised in that：Permanent magnetism
Body（7）First type surface is in plane, installed in rotor disk（3、10）On face, another side on the other side is raised in circular arc, and circular arc is raised
Face is positioned opposite along major axes orientation.
3. the iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 2, it is characterised in that：Permanent magnetism
Body（7）Total number is the even number more than 40, and magnetizing direction is axial direction.
4. iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 3, it is characterised in that：Stator line
Circle winding（8）Coil electric angle, span be 220-260 °.
5. iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 4, it is characterised in that：Stator line
Circle winding（8）Coil electric angle, takes 240 °, and coil number sum is the positive integer that can be divided exactly by 3.
6. iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 5, it is characterised in that：The master
Axle is hollow spindle（1）, hollow spindle（1）It is provided with stator coil winding（8）Lead-out wire（12）Through wires hole（11）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057751.1A CN104578634B (en) | 2015-02-04 | 2015-02-04 | A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057751.1A CN104578634B (en) | 2015-02-04 | 2015-02-04 | A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104578634A CN104578634A (en) | 2015-04-29 |
| CN104578634B true CN104578634B (en) | 2017-03-15 |
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| CN201510057751.1A Expired - Fee Related CN104578634B (en) | 2015-02-04 | 2015-02-04 | A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107154714A (en) * | 2017-07-12 | 2017-09-12 | 上海僖舜莱机电设备制造有限公司 | Temp auto-controlled disc type high-power density generator |
| CN107979256A (en) * | 2017-12-28 | 2018-05-01 | 山西东辉新能源动力研究院有限公司 | A kind of ultralight axial magnetic field wheel hub motor |
| CN111384796A (en) * | 2018-12-29 | 2020-07-07 | 上海微创心力医疗科技有限公司 | Motor stator, die and method for manufacturing motor stator, motor and catheter pump |
| CN112392661B (en) * | 2019-08-16 | 2021-11-02 | 长沙理工大学 | Oscillating wind power generation equipment with adjustable frequency |
| CN113217284B (en) * | 2021-05-17 | 2022-07-22 | 广州赛特新能源科技发展有限公司 | Direct-drive breeze wind driven generator system |
| CN115864760B (en) * | 2023-02-07 | 2023-05-05 | 常州双联磁电科技有限公司 | Coil device, axial flux motor and manufacturing method of coil device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100803570B1 (en) * | 2006-06-20 | 2008-02-15 | 엘지전자 주식회사 | Axial air-gap type motor |
| CN101951106B (en) * | 2010-08-06 | 2013-01-23 | 深圳创维－Rgb电子有限公司 | Ultrathin high-power direct current magnetoelectric motor |
| KR101398680B1 (en) * | 2013-02-25 | 2014-05-27 | 호남대학교 산학협력단 | Afpm generator for small wind turbines |
| CN204361870U (en) * | 2015-02-04 | 2015-05-27 | 河南理工大学 | The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator |
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