CN204361870U - The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator - Google Patents
The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator Download PDFInfo
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- CN204361870U CN204361870U CN201520078752.XU CN201520078752U CN204361870U CN 204361870 U CN204361870 U CN 204361870U CN 201520078752 U CN201520078752 U CN 201520078752U CN 204361870 U CN204361870 U CN 204361870U
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Abstract
The utility model discloses the two air-gap shaft of a kind of iron-core-free to flux permanent magnet wind generator, comprise main shaft, rotor and stator, rotor is symmetrically distributed in the rotor disk of stator both sides containing two, rotor disk medial surface is equipped with permanent magnet to stator, permanent magnet shape be containing the magnetic pole angle that varies in size band cambered surface cut cheese or track type, and adjacent permanent magnet is along the circumferential direction different with the permanent magnet pole embrace relative along major axes orientation.Stator comprises stator coil winding and strutting piece thereof, and stator adopts the centralized winding of individual layer of not overlapping three-phase symmetrical, and coil shape is rhombus or taper, iron-core-free structure.The generator of the alternative traditional radial flux of the utility model and cored structure, structure compared is simple, start light, generating efficiency and quality high, noise is little, be highly suitable for miniature direct-drive formula vertical axis wind power generation system, can being widely used in city, pastoral area, island, fishing boat etc., to require that generating equipment moves flexibility good, power generating quality and the higher occasion of efficiency.
Description
Technical field
The utility model relates to a kind of wind-driven generator, is specifically related to the two air gap axial flux permanent magnet induction wind driven generator of a kind of stator iron-core-free.
Background technology
At present, small-sized wind power generator mainly contains radial and axial magnetic flux two kinds of forms, and axial magnetic flux electric generator structure is compact, and torque density is large, and axial length is short, is easily designed to multipolar dynamo; In addition, stator design becomes iron-core-free structure, the impact of cogging torque power in generator operation can be eliminated, reduce magnetic hysteresis and eddy current loss, reduce generator incision wind speed, can operate in larger wind speed range, be applicable to the directly-driving wind power generation system without step-up gear, improve the reliability of wind generator system.
Small-sized wind power generator requires that motor incision wind speed is low, and moment of inertia is large, can realize breeze wind; Generating efficiency is high, and loss is little; Power generating quality is high, and harmonic content is low; Lightweight, volume is little, and stock utilization is high, and compact conformation is simple.
The domestic iron-core-free axial flux permanent magnet generator exported this high quality of power supply is very rare at present, as the axial-flux electric machine involved by Chinese utility model patent CN 103887909A, stator winding is cored, its structure is consistent with domestic and international correlation theory research, because its starting torque is dynamic large, be difficult to starting-generating under gentle breeze, the quality of power supply is also difficult to ensure simultaneously, is not suitable for small-size wind power-generating field.
Summary of the invention
The purpose of this utility model be to provide a kind of can breeze start-up generating, power generating quality high, run and lightly stablize, two air-gap shaft simple and compact for structure are to flux permanent magnet wind generator.
The technical solution adopted in the utility model is: the two air-gap shaft of this iron-core-free is to flux permanent magnet wind generator, comprise main shaft, rotor and stator, described stator is fixedly connected with described main shaft, described rotor is symmetrically distributed in the rotor disk of described stator both sides containing two, described rotor disk medial surface is equipped with permanent magnet to described stator, rotor disk is bearing on described main shaft, is characterized in, described permanent magnet shape be pole embrace not wait while surperficial circular arc projection cut cheese or track type.
Below the relevant technologies means in some preferred versions:
Described permanent magnet, along the multiple permanent magnet of described rotor disk circumferential directions, evenly alternately places N pole and S polar body, and adjacent permanent magnet is along the circumferential direction different with the permanent magnet pole embrace relative along major axes orientation, and pole embrace gets 0.7 and 0.8 respectively.
Further, described permanent magnet first type surface is plane, is arranged in rotor disk face, and another side on the other side is that circular arc is protruding, and circular arc crowning is positioned opposite vertically.
Further, described permanent magnet total number be greater than 40 even number, magnetize all vertically.
The strutting piece that described stator comprises stator coil winding and is fixed together, described stator winding coil is fixedly connected with described main shaft by strutting piece, and described stator winding coil is through epoxy resin injection molding.
Described stator winding adopts the centralized winding of individual layer of not overlapping three-phase symmetrical, and shape is rhombus or taper, iron-core-free and tooth slot structure.
Further, the coil electric angle of described stator coil winding can the scope 220-260 ° of value, and its coil number adds up to the positive integer that can be divided exactly by 3.
Described main shaft is hollow spindle.Described hollow spindle is provided with the aperture of described stator coil winding leading-out wire.
Compared with existing axial magnetic flux generator, the utility model patent has the following advantages:
1, the axial flux permanent magnet generator shown in the utility model, adopt have a circular arc projection cut cheese or track type permanent magnet shape, there is the generator output quality of power supply high, harmonic content is low, waveform sine is good, the advantage that permanent magnetic material utilance is high, adopts and the rhombus of permanent magnet form fit or tape winding simultaneously, can effectively reduce end winding length and copper loss, improve generating efficiency;
2, the permanent magnet arrangement of the utility model employing, has reduction leakage field, saves permanent magnet material, reduces the feature of torque ripple;
3, the utility model adopts the centralized winding of individual layer of not overlapping three-phase symmetrical, shape is rhombus or taper, the stator component structure of iron-core-free and teeth groove, this stator does not almost have magnetic hysteresis and eddy current loss, and avoid the impact needing to overcome cogging torque power when wind-driven generator starts, slotless structure makes coil winding freedom and flexibility more simultaneously, save the constraint of slot form, motor rotation is more brisk, can accomplish the low speed even target of Ultra-Low Speed startup generating to improve wind energy utilization;
4, multiple coil couples together and is made into stator winding by the utility model in a certain order, through epoxy resin to its injection molding, by stator winding and support component integrated treatment, make it be fixed on main shaft, ensure that motor there will not be vibration and large noise when running continually and steadily.
Comprehensive above-mentioned advantage, main axial flux permanent magnet motor of the present utility model can substitute the generator of traditional radial flux and cored structure, structure compared is simple, start light, generating efficiency and quality high, noise is little, is highly suitable for miniature direct-drive formula vertical major wind generator system, can being widely used in city, pastoral area, island, fishing boat etc., to require that generating equipment moves flexibility good, power generating quality and the higher occasion of efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is a kind of schematic diagram cutting cheese permanent magnet;
Fig. 3 is the cutaway view of Fig. 2 along A-A;
Fig. 4 is the layout schematic diagram of rotor disk permanent magnet;
Fig. 5 is stator coil winding schematic shapes;
Tu6Shi stator coil winding layout schematic diagram.
Each label in figure: 1, hollow spindle, 2, bearing (ball) cover, 3, upper rotor part dish, 4, bolt, 5, bearing, 6, stator coil winding support, 7, permanent magnet, 8, stator coil winding, 9, casing, 10, lower rotor part dish, 11, through wires hole, 12, winding leading-out wire.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1, this stator iron-core-free main shaft, to magnetic flux permanent magnet generator, comprises main shaft, rotor and stator.Described stator is fixed on described main shaft, and described rotor is containing two rotor disks, and rotor disk is placed in stator both sides, is connected with described spindle mobility.
Described main shaft adopts hollow spindle 1.
Described rotor comprises upper and lower two rotor disks 3 and 10, and the permanent magnet 7 on upper and lower rotor disk 3 and 10, and the hollow spindle 1 that rotor supports around it rotates, and hollow spindle 1 is strutting piece, relative rotor non rotating.Upper and lower rotor disk 3,10 is fixed on electric generator casing 9 by six bolts 4, i.e. rotor disk 3,10 and permanent magnet 7 and casing composition rotating parts.
On upper and lower two rotor disks 3 and 10, correspondence arranges the permanent magnet 7 of two kinds of different magnetic poles angles respectively, and all along stator described in hollow spindle 1 axially facing, certain air gap distance is had between the winding coil of permanent magnet and described stator, N pole and the S pole (as shown in Figure 4) of permanent magnet 7 is along the circumferential direction alternately placed inside rotor disk, and make rotor disk 3 contrary to the face polarity of relative two pieces of permanent magnets along main shaft with on 10, namely both magnetizing directions are along main axial opposed, one upward, one down, pole embrace is simultaneously not identical yet, simultaneously similar with it along main axial distribution, namely, along the circumferential direction go up, two pieces of adjacent permanent magnet magnetizing directions are contrary, pole embrace is not etc.
The magnetic pole logarithm of described rotor disk be greater than 10 positive integer, that is on each rotor disk, permanent magnet number is 20 or more, permanent magnet number=magnetic pole logarithm × 2 on a rotor disk, described generator pole embrace gets Arbitrary Digit between 0.7-0.8, then permanent magnet pole angle=pole embrace × magnetic pole logarithm/180, it is special that rotor disk 3 is different with the pole embrace of two pieces of permanent magnets adjacent with relative on 10 up and down, namely magnetic pole angle is different, namely magnetic pole angle one is large, one little, and two groups of pole embraces of the present utility model are 0.7 and 0.8 respectively.
As shown in Figure 2,3, permanent magnet 7 shape cuts cheese, cuts cheese permanent magnet and be similar to the shape being cut into by circular permanent magnet and having certain magnetic pole angle; Permanent magnet 7 shape also can be track type, and track type permanent magnet has level to repack the shape of magnetic pole angle into permanent magnet straight line portion.The object of preferred described permanent magnet 7 shape is, makes full use of permanent magnet material, reaches the object improving permanent magnet utilance.Especially, permanent magnet 7 first type surface is plane, be arranged in rotor disk face, namely another side on the other side is designed to circular arc projection towards the one side of coil, and circular arc crowning is positioned opposite vertically, the circular arc main shaft of its protrusions and permanent magnet 7 coincides, preferred circular arc bulge-structure object is to improve power generator air gap sinusoidal magnetic field distribution character, make air-gap field close to sineization, be finally conducive to reducing generator harmonic wave, improve electric energy output quality.
Permanent magnet 7 material adopts the Rb-Fe-B material of high energy product.
Stator is on the whole in iron-core-free and tooth slot structure, iron-core-free makes motor almost not have magnetic hysteresis and eddy current loss, avoid the impact needing to overcome cogging torque power when wind-driven generator starts, slotless structure makes coil winding freedom and flexibility more, saves the constraint of slot form.
Described stator comprises stator coil winding 8 and stator support 6, through epoxy resin, winding coil injection molding is processed, stator coil winding 8 and strutting piece 6 are fixed together, be arranged on hollow spindle 1, wherein the aperture 11 of the lead-out wire 12 of coil windings 8 on hollow spindle 1 is drawn, and described stator relative rotor is static.In sum, stator coil winding 8, strutting piece 6 and hollow shaft 1 form stationary parts.
As shown in Figure 5,6, the shape of stator coil winding 8 is rhombus or taper, iron-core-free structure, preferred rhombus or tape winding shape object are that its shape is comparable to permanent magnet 7, make the conductor of the coiler part corresponding with permanent magnet 7 circular arc portion effective, also can effective cutting magnetic line, induce electric energy, it also reduce end winding length, relative reduces copper loss, improves generating efficiency.
Stator coil winding 8 adopts the concentratred winding of not overlapping three-phase symmetrical, coil count has motor number of pole-pairs and coil angle to determine, that is coil number=360 × magnetic pole logarithm/coil angle, here point out especially, coil angle is electric angle on-mechanical angle, electric angle=magnetic pole logarithm × 360, as θ p/ θ c>0.4 (as Fig. 5, here the width of coil in a certain radius is represented with electrical degree θ c), coil angle gets 220-260 °, coil angle involved by the utility model is chosen according to the pole embrace of maximum a group, namely 0.7 and 0.8, coil angle gets the electrical degree of 240 °.
The strutting piece 6 of stator coil winding 8 extends out to the inner side of winding 8 from hollow spindle 1 along radial direction, strutting piece 6 is arranged in the middle of two rotor disks 3 and 10, namely in the centre of the arc surface of upper and lower permanent magnet 7 projection, stator support 6 is nested on hollow spindle 1 by interference fit, relatively described rotor keeps static, and the arc surface of permanent magnet and stator coil surfaces beeline are 0.5-2.0mm.
Base bearing parts 5 are arranged on hollow spindle 1 outer surface, metal (upper 5 is along main shaft to the endoporus portion being embedded in two rotor disks 3 and 10 respectively, and it is equal with the distance between rotor disk 3 and 10, metal (upper 5 can make rotor rotate around hollow spindle 1, simultaneously support rotor weight and be applied to epitrochanterian load, metal (upper 5 is respectively equipped with the main bearing end cover 2 sealed outward along main shaft.
As mentioned above, the utility model is simple and compact for structure, and electric motor starting is spry and light, is highly suitable for gentle wind power generation system, have start generating rotating speed low, generating efficiency and quality high, smooth running, the advantage that loss is low.
Should be understood that; those skilled in the art are noted that; the protection range not departing from the utility model claim and ask; and when without prejudice to the utility model aim; equivalent substituting or obvious modification can be made to described embodiment, and some improvement or retouching.
Claims (9)
1. the two air-gap shaft of iron-core-free is to flux permanent magnet wind generator, comprise main shaft, rotor and stator, described stator is fixedly connected with described main shaft, described rotor is symmetrically distributed in upper rotor part dish (3) and the lower rotor part dish (10) of described stator both sides containing two, rotor disk (3,10) medial surface is equipped with permanent magnet (7) to described stator, rotor disk is bearing on described main shaft, and be fixedly connected with electric generator casing (9), it is characterized in that: permanent magnet (7) shape is cut cheese or track type containing vary in size pole embrace and surperficial circular arc projection.
2. the two air-gap shaft of iron-core-free according to claim 1 is to flux permanent magnet wind generator, it is characterized in that: permanent magnet (7) is the multiple permanent magnets along rotor disk (3,10) circumferential directions, evenly alternately place N pole and S pole, and adjacent permanent magnet is along the circumferential direction different with the permanent magnet pole embrace relative along described major axes orientation, pole embrace gets 0.7 and 0.8 respectively.
3. the two air-gap shaft of iron-core-free according to claim 2 is to flux permanent magnet wind generator, it is characterized in that: permanent magnet (7) first type surface is plane, be arranged on rotor disk (3,10) face, another side on the other side is that circular arc is protruding, and circular arc crowning is positioned opposite along major axes orientation.
4. the two air-gap shaft of iron-core-free according to claim 3 is to flux permanent magnet wind generator, it is characterized in that: permanent magnet (7) total number be greater than 40 even number, magnetizing direction is axis.
5. according to the two air-gap shaft of the arbitrary described iron-core-free of claim 1-4 to flux permanent magnet wind generator, it is characterized in that: the strutting piece (6) that described stator comprises stator coil winding (8) and is fixed together, stator coil winding (8) is fixedly connected with described main shaft by strutting piece (6).
6. the two air-gap shaft of iron-core-free according to claim 5 is to flux permanent magnet wind generator, it is characterized in that: stator coil winding (8) adopts the centralized winding of individual layer of not overlapping three-phase symmetrical, and shape is rhombus or taper, iron-core-free and tooth slot structure.
7. the two air-gap shaft of iron-core-free according to claim 6 is to flux permanent magnet wind generator, and it is characterized in that: the coil electric angle of stator coil winding (8), span is 220-260 °.
8. the two air-gap shaft of iron-core-free according to claim 7 is to flux permanent magnet wind generator, and it is characterized in that: stator coil winding (8) coil electric angle, get 240 °, coil number adds up to the positive integer that can be divided exactly by 3
.
9. the two air-gap shaft of iron-core-free according to claim 8 is to flux permanent magnet wind generator, and it is characterized in that: described main shaft is hollow spindle (1), hollow spindle (1) is provided with the through wires hole (11) of stator coil winding (8) lead-out wire (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520078752.XU CN204361870U (en) | 2015-02-04 | 2015-02-04 | The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520078752.XU CN204361870U (en) | 2015-02-04 | 2015-02-04 | The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204361870U true CN204361870U (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520078752.XU Withdrawn - After Issue CN204361870U (en) | 2015-02-04 | 2015-02-04 | The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204361870U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578634A (en) * | 2015-02-04 | 2015-04-29 | 河南理工大学 | Iron-core-free dual-air-gap axial magnetic flux permanent magnetic wind driven generator |
| CN107659012A (en) * | 2017-10-25 | 2018-02-02 | 常州威灵电机制造有限公司 | Rotor punching, rotor and motor |
| CN110994849A (en) * | 2019-11-21 | 2020-04-10 | 湖北工业大学 | Novel stator winding structure based on axial coreless motor |
| CN113809851A (en) * | 2021-09-17 | 2021-12-17 | 南京理工大学 | Axial flux permanent magnet motor with unequal pole arc coefficients |
| RU2797718C1 (en) * | 2022-12-31 | 2023-06-08 | Василий Васильевич Байковский | Generator for wind turbine |
| US11815367B2 (en) | 2021-09-27 | 2023-11-14 | Industrial Technology Research Institute | Battery-free rotation detecting device |
-
2015
- 2015-02-04 CN CN201520078752.XU patent/CN204361870U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578634A (en) * | 2015-02-04 | 2015-04-29 | 河南理工大学 | Iron-core-free dual-air-gap axial magnetic flux permanent magnetic wind driven generator |
| CN107659012A (en) * | 2017-10-25 | 2018-02-02 | 常州威灵电机制造有限公司 | Rotor punching, rotor and motor |
| CN107659012B (en) * | 2017-10-25 | 2024-07-12 | 广东威灵电机制造有限公司 | Rotor punching sheet, rotor and motor |
| CN110994849A (en) * | 2019-11-21 | 2020-04-10 | 湖北工业大学 | Novel stator winding structure based on axial coreless motor |
| CN113809851A (en) * | 2021-09-17 | 2021-12-17 | 南京理工大学 | Axial flux permanent magnet motor with unequal pole arc coefficients |
| CN113809851B (en) * | 2021-09-17 | 2022-12-27 | 南京理工大学 | Axial flux permanent magnet motor with unequal pole arc coefficients |
| US11815367B2 (en) | 2021-09-27 | 2023-11-14 | Industrial Technology Research Institute | Battery-free rotation detecting device |
| TWI843967B (en) * | 2021-09-27 | 2024-06-01 | 財團法人工業技術研究院 | Battery-free rotation detecting device |
| RU2797718C1 (en) * | 2022-12-31 | 2023-06-08 | Василий Васильевич Байковский | Generator for wind turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150527 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150527 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |