CN102290890A - Novel double-salient permanent magnet direct-drive wind driven generator - Google Patents
Novel double-salient permanent magnet direct-drive wind driven generator Download PDFInfo
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- CN102290890A CN102290890A CN2011102418831A CN201110241883A CN102290890A CN 102290890 A CN102290890 A CN 102290890A CN 2011102418831 A CN2011102418831 A CN 2011102418831A CN 201110241883 A CN201110241883 A CN 201110241883A CN 102290890 A CN102290890 A CN 102290890A
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- Y—GENERAL 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a novel double-salient permanent magnet direct-drive wind driven generator. The generator is a 6/14 pole double-salient permanent magnet motor, wherein concentrated windings are respectively arranged above salient poles of six stator iron cores, two concentrated windings in positions opposite to each other are connected in series to form a phase, permanent magnets are respectively arranged above the pole shoe end faces of the salient poles of the six stator iron cores; the adjacent permanent magnets above the salient poles of the adjacent stator iron cores have same polarity, the arc length of the stator iron core salient poles are 49 degrees, the arc length of each magnetic pole on the salient poles of the stator iron cores is 12 degrees, the arc length of the salient pole of a rotor iron core arranged on a motor shaft 5 is 10 degrees, the angle of the rotor chute is 8.57 degrees; and the permanent magnets are two pairs of neodymium iron boron magnets which are arranged in a staggered manner and the thickness of the permanent magnets is 2.5mm. The generator provided by the invention has the following beneficial effects: the permanent magnets with high magnetic energy are placed on the surfaces of the salient poles of the stator iron cores, thus the permanent magnets are easy to install; more suitable parameters such as a combined size between the stator and the rotor and the like can be determined by the comparisons of motor performance curves of different sizes, thus better motor performance and material utilization can be obtained.
Description
Technical field
The present invention relates to technical field of wind power generator, relate in particular to a kind of novel doubly-salient permanent magnet direct-driving aerogenerator.
Background technology
In recent years, because global energy is in short supply and the reinforcement of environmental consciousness, clean energy resource has obtained very big development.
Wind power generation develops rapidly in worldwide as a kind of principal mode that clean energy resource utilizes, and its technology also reaches its maturity.In wind generator system, wind-driven generator occupies critical role as one of critical component in system, and performance is effect mainly.Make a general survey of the development of wind turbine generator in the world, more and more be tending towards on the one hand maximizing, make the wind-driven generator single-machine capacity constantly increase; On the other hand, very most of manufacturer is conceived to the exploitation of small-sized wind power generator, and it is civilian that reason is that small-sized wind power generator mostly is, it is little to have size, easy for installation, and cost is low, the efficient advantages of higher, and have the various regions of being suitable for and climatic environment, use characteristics more widely.
Though the wind-driven generator that uses has above-mentioned advantage at present, mostly is common asynchronous moter and synchronous machine, therefore there is certain weak point:
1, wind generator system often need be provided with mechanical variable speed device for obtaining low rate start, has increased the complexity of equipment thus, has reduced the reliability of equipment operation.The more important thing is that the mechanical variable speed device of being set up certainly exists the problem of energy conversion efficiency, the efficient of whole wind generator system is reduced.
2, under the traditional approach, adopt empirical equation to the stator and rotor size combinations to wind-driven generator more, parameters such as gas length, permanent magnet thickness are determined, have the artificial factor of setting, and make motor performance and stock utilization fundamentally obtain optimum Match.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, and a kind of novel doubly-salient permanent magnet direct-driving aerogenerator is provided.It has winding utilization height, simple in structure, advantage that moment of inertia is little.
To achieve these goals, the present invention adopts following technical scheme:
A kind of novel doubly-salient permanent magnet direct-driving aerogenerator, this generator is 6/14 utmost point doubly salient permanent magnet motor, promptly comprise 14 rotor core salient poles and 6 stator core salient poles, be respectively arranged with concentrated winding above six stator core salient poles, two relative concentrated windings in series of position constitute a phase each other, are respectively arranged with permanent magnet on six stator core salient pole pole shoe end faces; Adjacent permanent magnet polarity on the adjacent stators iron core salient pole is identical, each stator core salient pole arc length is 49 °, each the permanent magnet arc length that is located on the stator core salient pole is 12 °, and the rotor core salient pole arc length that is located on the motor shaft is 10 °, and the rotor chute angle is 7 °～9 °.
Rotor chute angle the best of the present invention is 8.57 °.On each stator core salient pole, described permanent magnet is that two pairs of staggered thickness of polarity are the ndfeb magnet of 2.5mm.
Beneficial effect of the present invention:
This novel doubly-salient permanent-magnetic wind driven generator is a direct-drive type, need not mechanical variable speed device, the efficient and the operational reliability of unit have been improved, except that advantage with general magneto, compare with traditional doubly salient permanent magnet motor, it is located at the permanent magnet of high magnetic energy on the pole shoe end face of stator core salient pole, makes that permanent magnet is easy to install; Along with the rotor rotation, concentrate the permanent magnet flux of winding institute interlinkage to change polarity on the doubly salient permanent magnet motor stator, this means to produce the flux change bigger than magnetic flux pulsating.
Calculate 6/14 utmost point doubly salient permanent magnet motor size, by changing key dimension such as stator and rotor arc length, gas length and the permanent magnet thickness etc. of motor, the situation of change of the magnetic linkage that plays a decisive role to the winding inductance in the motor, cogging torque and to the size and the waveform of induced electromotive force, carry out comparatively detail analysis and research, and obtained satisfied result.
Analyzed more size combinations, design feature in view of doubly salient permanent magnet motor, situation under the various sizes combination has all been carried out finite element analysis, finally determined comparatively suitable stator and rotor size combinations by contrast to the motor performance curve that obtains under the different size, parameters such as gas length, permanent magnet thickness are so that obtain more excellent motor performance and stock utilization.
Description of drawings
Fig. 1 is 6/14 utmost point stator sectional view.
Fig. 2 is the rotor sectional view.
Fig. 3 is the sectional view of whole motor.
When Fig. 4 is the collocation of different stator and rotor iron core salient pole arc length, to the influence of magnetic linkage amplitude.
When Fig. 5 is the collocation of different stator and rotor iron core salient pole arc length, to the influence of cogging torque amplitude.
Fig. 6 is the influence of rotor tilt angle to cogging torque.
Fig. 7 is the influence of rotor tilt angle to the magnetic linkage amplitude.
Fig. 8 is the relation of rotor tilt angle and skew slot factor.
Regulator curve when Fig. 9 is 214rpm for rotating speed.
Figure 10 is the machine operation principle schematic.
Wherein 1. stator core salient poles are 2. concentrated winding, 3. permanent magnet, 4. air gap, 5. motor shaft, 6. rotor core salient pole.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, Fig. 2, Fig. 3, a kind of novel doubly-salient permanent magnet direct-driving aerogenerator, this generator is 6/14 utmost point doubly salient permanent magnet motor, promptly comprise 14 rotor core salient poles 6 and 6 stator core salient poles 1, be respectively arranged with above six stator core salient poles 1 and concentrate winding 2, two relative concentrated winding 2 series connection of position constitute a phase each other, are respectively arranged with permanent magnet 3 on six stator core salient pole 1 pole shoe end faces; Adjacent permanent magnet 3 polarity on the adjacent stators iron core salient pole 1 are identical, each stator core salient pole 1 arc length is 49 °, each permanent magnet 3 arc length that is located on the stator core salient pole 1 are 12 °, and rotor core salient pole 6 arc length that are located on the motor shaft 5 are 10 °, and the rotor chute angle is 7 °～9 °.
Described rotor chute angle the best is 8.57 °.
On each stator core salient pole 1, described permanent magnet 3 is that two pairs of staggered thickness of polarity are the ndfeb magnet of 2.5mm.
Have air gap 4 between permanent magnet 3 and the stator core salient pole 1.
When Fig. 4 is different stator core salient poles 1, the collocation of rotor core salient pole 6 polar arcs, to the influence of magnetic linkage amplitude.
Analyze of the influence of stator and rotor iron core salient pole arc length degree, to determine best stator and rotor iron core salient pole arc length degree to motor magnetic linkage amplitude, cogging torque.
When Fig. 5 is the collocation of different stator and rotor iron core salient pole arc length, to the influence of cogging torque amplitude.
Learn from Fig. 4 and Fig. 5 analysis-by-synthesis, 49 ° of stator core salient pole 1 arc length, rotor core salient pole 6 arc length are more suitable selection for 10 °.
The biconvex electrode structure of doubly salient permanent magnet motor has determined that its cogging torque is bigger in addition, therefore when motor application in to the higher occasion of torque request the time, must reduce the influence of cogging torque by skewed slot, the angle that tilts is 2 π/S, and wherein S is the least common multiple of stator core salient pole 1 and rotor core salient pole 6.Because model machine is 6/14 utmost point, so S=42, the cycle of cogging torque is 2 π/42, and corresponding mechanical angle is 8.57 °.
We are equally divided into 5 sections to rotor in this motor, differ from a mechanical angle between any two, have been equivalent to rotor tilt 8.57 °, we can be in 1.714 ° respectively with rotor, and 3.428 °, 5.142 °, 6.856 °, the magnetic linkage mean value of gained is represented on 8.57 ° of these 5 positions.
Fig. 6 is the influence of rotor tilt angle variation to cogging torque.
Fig. 7 is the influence of rotor tilt angle variation to the magnetic linkage amplitude.
The relation of Fig. 8 rotor tilt angle and skew slot factor.
The amplitude of the electromotive force that obtains after the rotor tilt is compared with the electromotive force before not tilting, just can be obtained skew slot factor at this moment.The relation of skew slot factor of Ji Suaning and rotor tilt angle as shown in Figure 8 thus: be not difficult to find out the increase along with the rotor tilt angle from figure, the value of skew slot factor declines by a big margin.
Being taken all factors into consideration by Fig. 6, Fig. 7 and Fig. 8, is 8.57 ° so select the rotor chute angle.
External characteristic curve when Fig. 9 is rated speed 214rpm for the strip resistance load speed, its characteristic curve show that the voltage change ratio of generator is little.
Studies show that more than in the doubly salient permanent magnet motor project organization that stator core salient pole 1 arc length and rotor core salient pole 6 arc length are to influence the topmost design variable of motor performance.The stator and rotor salient pole arc length that changes doubly salient permanent magnet motor can cause bigger influence to motor properties, therefore can improve motor performance by selecting suitable size.For the doubly salient permanent magnet motor of 6/14 structure, 49 ° of stator core salient pole 1 arc length, rotor core salient pole 6 arc length are more suitable selection for 10 °, motor properties is preferable.
Among Figure 10, because the inductance of doubly salient permanent magnet motor is less, so should ignore the armature reaction influence when analyzing magnetic field.And turning to of regulation motor to counterclockwise, be positioned at the moment of 10a position when rotor, be the equilbrium position of motor this moment, the center line of rotor tooth and stator tooth center line coincide, permanent magnet 3 magnetic linkages only by stator core salient pole 1 and rotor core salient pole 6 closures, do not have magnetic flux and A phase winding intersecting chain.Rotation along with rotor, the magnetic flux of A phase winding interlinkage increases gradually, when reach Figure 10 b shown in the position, rotate through 1/2 permanent magnet, 3 arc length, permanent magnet 3 center lines that promptly center line of 2 rotor tooths is corresponding with it respectively coincide, at this moment, the magnetic flux of A phase winding institute interlinkage reaches maximum, and the induced electromotive force of A phase winding is zero.Rotor continues to be rotated counterclockwise, and A phase winding magnetic linkage begins to reduce, and when rotor turns over 1/2 permanent magnet arc length again, arrives the moment of 10c position, and the magnetic flux of A phase winding institute interlinkage is reduced to zero, and this is that motor arrives the equilbrium position for the second time.Rotor turns over the position that 1/2 permanent magnet arc length arrives 10d more counterclockwise, and this moment, A phase magnetic linkage reached reverse maximum, the induced electromotive force vanishing.Rotor continues rotation 1/2 permanent magnet 3 arc length, arrives the position of Figure 10 a, repeats next circulation.So 6/14 utmost point doubly salient permanent magnet motor rotor turns in the process of 1 rotor core salient pole 6 tooth pitch, the magnetic flux of the every phase winding of motor institute interlinkage and induced electromotive force are bipolarity and change one-period.
Though above-mentionedly in conjunction with the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (3)
1. novel doubly-salient permanent magnet direct-driving aerogenerator, it is characterized in that, this generator is 6/14 utmost point doubly salient permanent magnet motor, promptly comprise 14 rotor core salient poles and 6 stator core salient poles, be respectively arranged with concentrated winding above six stator core salient poles, two relative concentrated windings in series of position constitute a phase each other, are respectively arranged with permanent magnet on six stator core salient pole pole shoe end faces; Adjacent permanent magnet polarity on the adjacent stators iron core salient pole is identical, each stator core salient pole arc length is 49, each the permanent magnet arc length that is located on the stator core salient pole is 12 °, and the rotor core salient pole arc length that is located on the motor shaft is 10 °, and the rotor chute angle is 7 °～9 °.
2. as claims 1 described a kind of novel doubly-salient permanent magnet direct-driving aerogenerator, it is characterized in that described rotor chute angle is 8.57 °.
3. as claims 1 described a kind of novel doubly-salient permanent magnet direct-driving aerogenerator, it is characterized in that on each stator core salient pole, described permanent magnet is that two pairs of staggered thickness of polarity are the ndfeb magnet of 2.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102418831A CN102290890A (en) | 2011-08-23 | 2011-08-23 | Novel double-salient permanent magnet direct-drive wind driven generator |
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| CN2011102418831A CN102290890A (en) | 2011-08-23 | 2011-08-23 | Novel double-salient permanent magnet direct-drive wind driven generator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611230A (en) * | 2012-03-27 | 2012-07-25 | 国电联合动力技术(宜兴)有限公司 | Improved direct drive generator stator centralized double-winding coil |
| CN107040059A (en) * | 2017-06-13 | 2017-08-11 | 深圳华引动力科技有限公司 | Single phase multi module and single phase multi-stage module combined type switched reluctance machines |
| CN109088489A (en) * | 2018-09-21 | 2018-12-25 | 上海交通大学 | stator for wind-driven generator |
| CN110120767A (en) * | 2018-02-06 | 2019-08-13 | 本田技研工业株式会社 | Vehicle, dynamo-electric machine system and its manufacturing method equipped with dynamo-electric machine system |
| CN112671122A (en) * | 2020-12-31 | 2021-04-16 | 山东理工大学 | Stator and rotor block permanent magnet motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183806A (en) * | 2007-10-09 | 2008-05-21 | 天津大学 | Magnetic flux inverse type electric motor |
| CN202167906U (en) * | 2011-08-23 | 2012-03-14 | 山东大学 | Novel double salient permanent magnet direct drive power aerogenerator |
-
2011
- 2011-08-23 CN CN2011102418831A patent/CN102290890A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183806A (en) * | 2007-10-09 | 2008-05-21 | 天津大学 | Magnetic flux inverse type electric motor |
| CN202167906U (en) * | 2011-08-23 | 2012-03-14 | 山东大学 | Novel double salient permanent magnet direct drive power aerogenerator |
Non-Patent Citations (1)
| Title |
|---|
| D.S.MORE ETC.: "Outer Rotor Flux Reversal Machine for Rooftop Wind Generator", 《INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611230A (en) * | 2012-03-27 | 2012-07-25 | 国电联合动力技术(宜兴)有限公司 | Improved direct drive generator stator centralized double-winding coil |
| CN107040059A (en) * | 2017-06-13 | 2017-08-11 | 深圳华引动力科技有限公司 | Single phase multi module and single phase multi-stage module combined type switched reluctance machines |
| CN107040059B (en) * | 2017-06-13 | 2023-11-07 | 深圳华引动力科技有限公司 | Single-phase multipole module and single-phase multipole module combined switch reluctance motor |
| CN110120767A (en) * | 2018-02-06 | 2019-08-13 | 本田技研工业株式会社 | Vehicle, dynamo-electric machine system and its manufacturing method equipped with dynamo-electric machine system |
| CN109088489A (en) * | 2018-09-21 | 2018-12-25 | 上海交通大学 | stator for wind-driven generator |
| CN112671122A (en) * | 2020-12-31 | 2021-04-16 | 山东理工大学 | Stator and rotor block permanent magnet motor |
| CN112671122B (en) * | 2020-12-31 | 2022-11-25 | 山东理工大学 | Stator and rotor block permanent magnet motor |
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Application publication date: 20111221 |