CN102983649B - Permanent-magnet wind power generator rotor and permanent-magnet wind power generator - Google Patents
Permanent-magnet wind power generator rotor and permanent-magnet wind power generator Download PDFInfo
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- CN102983649B CN102983649B CN201210570749.0A CN201210570749A CN102983649B CN 102983649 B CN102983649 B CN 102983649B CN 201210570749 A CN201210570749 A CN 201210570749A CN 102983649 B CN102983649 B CN 102983649B
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Abstract
The invention discloses a permanent-magnet wind power generator rotor which comprises a rotor iron core and a protective magnetic conductive sheath, wherein permanent magnets are distributed on the rotor iron core in a Halbach array manner; multiple permanent magnets are arranged under each pole of the rotor iron core; and the protective magnetic conductive sheath is arranged on the outer sides of the permanent magnets. According to the permanent-magnet wind power generator rotor, a Halbach array permanent magnet structure is verified and is a mature structure that can effectively improve the power density of the permanent magnets. With the adoption of the rotor, the flux leakage can be solved theoretically, a perfect sinusoidal output waveform can be obtained, the influence of harmonic magnetic potential is weakened greatly, the power density of the permanent-magnet synchronous wind power generator and the utilization ratio of the permanent magnets are effectively improved and increased, and the heat dissipation and fastening of the permanent magnets can be combined effectively in a magnetic steel fixing mode. The invention further discloses a permanent-magnet wind power generator provided with the permanent-magnet wind power generator rotor.
Description
Technical field
Technical field of generators of the present invention, more particularly, relates to a kind of permanent magnet wind power generator rotor and permanent-magnetic wind driven generator.
Background technology
At permanent-magnetic wind driven generator design field, generator amature generally adopts permanent magnet surface-mount type or built-in structure, and from the direction of magnetization, mostly be radial or parallel magnetization, the permanent magnet utilance of these structures is not high.
Secondly, permanent-magnetic wind driven generator mostly needs by just grid-connected after the rectification of total power frequency converter, so have strict demand to generator output waveform, output waveform harmonic wave is larger, the impact caused frequency converter is larger, also higher to the power requirement of frequency converter, this can increase the holistic cost of wind-driven generator unit undoubtedly.At present, for reducing output waveform harmonic wave, protection frequency converter, permanent magnet synchronous wind generator generally adopts skewed stator slot and fractional-slot to carry out reduced harmonic impact, but this adjustment can only reduce harmonic wave within the specific limits.
Therefore, how to effectively reduce the harmonic content of permanent magnet synchronous wind generator output waveform, and improve the utilance of permanent magnet generator permanent magnet, become the technical problem that those skilled in the art are urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention provides a kind of permanent magnet wind power generator rotor and permanent-magnetic wind driven generator, effectively reduce the harmonic content of permanent magnet synchronous wind generator output waveform, and improve the utilance of permanent magnet generator permanent magnet.
For achieving the above object, the invention provides following technical scheme:
A kind of permanent magnet wind power generator rotor, comprises rotor core, the permanent magnet that on described rotor core, Halbach array is placed with, and described rotor core each extremely under permanent magnet be made up of polylith;
Also comprise one deck protective magnetic conduction sheath being arranged at and adding outside described permanent magnet.
Preferably, in above-mentioned permanent magnet wind power generator rotor, the axis of described rotor core offers radial ducts, and described radial ducts is opened between the two adjacent groups permanent magnet along described rotor core axially-aligned.
Preferably, in above-mentioned permanent magnet wind power generator rotor, offer the screwed hole of a circle for fixing described protective magnetic conduction sheath in described radial ducts, stretching screw is fixed by nut through described protective magnetic conduction sheath and described screwed hole successively.
Preferably, in above-mentioned permanent magnet wind power generator rotor, between described rotor core and described nut, be provided with pad.
Preferably, in above-mentioned permanent magnet wind power generator rotor, described protective magnetic conduction sheath offers deep gouge for the position of wearing described stretching screw.
Preferably, in above-mentioned permanent magnet wind power generator rotor, described rotor core each extremely under permanent magnet form by more than three pieces.
Preferably, in above-mentioned permanent magnet wind power generator rotor, described rotor core offers the mounting groove that the degree of depth is 2 ~ 3mm, described permanent magnet is arranged in described mounting groove.
Preferably, in above-mentioned permanent magnet wind power generator rotor, described rotor core adopts laminated structure or solid construction.
A kind of permanent-magnetic wind driven generator, comprise rotor and stator, described rotor is the permanent magnet wind power generator rotor as above described in any one.
As can be seen from above-mentioned technical scheme, permanent magnet wind power generator rotor provided by the invention, it is that one is verified that Halbach displays magnet structure, effectively can improve the mature structure of permanent magnet power density, by implementing the present invention, leakage field phenomenon can be solved theoretically, obtaining perfect sinusoidal pattern output waveform, the impact of reduced harmonic magnetic potential greatly, effectively improves power density and the permanent magnet utilance of permanent magnet synchronous wind generator.Meanwhile, by implementing magnet steel fixed form of the present invention, can effectively by the heat radiation of permanent magnet with fasteningly to combine.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The partial sectional view of the permanent-magnetic wind driven generator that Fig. 1 provides for the embodiment of the present invention;
The partial structurtes schematic diagram of the permanent magnet wind power generator rotor that Fig. 2 provides for the embodiment of the present invention;
The section of the permanent magnet wind power generator rotor that Fig. 3 provides for the embodiment of the present invention.
Embodiment
The invention discloses a kind of permanent magnet wind power generator rotor and permanent-magnetic wind driven generator, effectively reduce the harmonic content of permanent magnet synchronous wind generator output waveform, and improve the utilance of permanent magnet generator permanent magnet.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1-Fig. 3, the partial sectional view of the permanent-magnetic wind driven generator that Fig. 1 provides for the embodiment of the present invention; The partial structurtes schematic diagram of the permanent magnet wind power generator rotor that Fig. 2 provides for the embodiment of the present invention; The section of the permanent magnet wind power generator rotor that Fig. 3 provides for the embodiment of the present invention.
The permanent magnet wind power generator rotor that the embodiment of the present invention provides, comprises rotor core 4, wherein, the permanent magnet 3 that on rotor core 4, Halbach array is placed with, and rotor core 4 each extremely under permanent magnet be made up of polylith; The present invention also comprises one deck protective magnetic conduction sheath 2 being arranged at and adding outside permanent magnet 3.
Halbach array and Halbach array (Halbach Array) are a kind of magnet structures, are the approximate ideal structures in engineering, and target produces the strongest magnetic field with minimum magnet.In conventional permanent magnet motor, because air-gap field inevitably exists harmonic wave, on rotor framework, skewed slot is generally taked to weaken its impact.In Halbach motor, because air-gap field Sine distribution degree is higher, harmonic content is little, therefore rotor is without the need to skewed slot.
Permanent magnet wind power generator rotor provided by the invention, it is that one is verified that Halbach displays magnet structure, effectively can improve the mature structure of permanent magnet power density, by implementing the present invention, leakage field phenomenon can be solved theoretically, obtain perfect sinusoidal pattern output waveform, greatly the impact of reduced harmonic magnetic potential, effectively improve power density and the permanent magnet utilance of permanent magnet synchronous wind generator.Meanwhile, by implementing magnet steel fixed form of the present invention, can effectively by the heat radiation of permanent magnet with fasteningly to combine.
In order to optimize technique scheme further, the axis of rotor core 4 offers radial ducts 41, and radial ducts 41 is opened between the two adjacent groups permanent magnet along rotor core 4 axially-aligned.Offer the screwed hole 42 of a circle for fixed protection magnetic conduction sheath 2 in radial ducts 41, stretching screw 6 is fixed by nut through protective magnetic conduction sheath 2 and screwed hole 42 successively.
The size of radial ducts 41 and quantity are determined according to generator axial length.Meanwhile, permanent magnet 3 in axially also segmentation, corresponding radial ducts 41 position, segmentation position.Be fixed between protective magnetic conduction sheath 2 and rotor core 4 by stretching screw 6 by Halbach array permanent magnet, stretching screw 6 position is just in time in radial ducts 41 position, can avoid permanent magnet 3 perforate.The present invention can effectively by the heat radiation of permanent magnet with fasteningly to combine.
Further, pad 5 is provided with between rotor core 4 and nut.Protective magnetic conduction sheath 2 offers deep gouge for the position of wearing stretching screw 6.Stretching screw 6 head end embeds the deep gouge of protective magnetic conduction sheath 2, and do not affect void dimension, tail end pad 5, nut are fixed, for convenience detach, is also convenient to rotor maintenance maintenance.
Further, rotor core 4 each extremely under permanent magnet form one group by more than three pieces, its direction of magnetization, according to Fig. 1 aligned transfer, forms built-in ring type Halbach array.Rotor core 4 offers the mounting groove that the degree of depth is 2 ~ 3mm, permanent magnet 3 is arranged in mounting groove, can effectively prevent coming off of permanent magnet.The present invention adopts packet type permanent magnet to be namely conducive to hydro-generator ventilation heat radiation, is also convenient to the installation of Halbach array permanent magnet.
The invention also discloses a kind of permanent-magnetic wind driven generator with above-mentioned permanent magnet wind power generator rotor, therefore have all technique effects of above-mentioned permanent magnet wind power generator rotor concurrently, do not repeat them here herein.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a permanent magnet wind power generator rotor, comprise rotor core (4), it is characterized in that, the permanent magnet (3) that the upper Halbach array of described rotor core (4) is placed with, and described rotor core (4) each extremely under permanent magnet be made up of polylith; The axis of described rotor core (4) offers radial ducts (41), described radial ducts (41) is opened between the two adjacent groups permanent magnet along described rotor core (4) axially-aligned, offer the screwed hole (42) of a circle for fixed protection magnetic conduction sheath (2) in described radial ducts (41), stretching screw (6) is fixed by nut through described protective magnetic conduction sheath (2) and described screwed hole (42) successively;
Also comprise one deck protective magnetic conduction sheath (2) being arranged at described permanent magnet (3) outside and adding.
2. permanent magnet wind power generator rotor as claimed in claim 1, is characterized in that, be provided with pad (5) between described rotor core (4) and described nut.
3. permanent magnet wind power generator rotor as claimed in claim 1, it is characterized in that, described protective magnetic conduction sheath (2) offers deep gouge for the position of wearing described stretching screw (6).
4. the permanent magnet wind power generator rotor as described in any one of claim 1-3, is characterized in that, described rotor core (4) each extremely under permanent magnet form by more than three pieces.
5. the permanent magnet wind power generator rotor as described in any one of claim 1-3, is characterized in that, described rotor core (4) offers the mounting groove that the degree of depth is 2 ~ 3mm, and described permanent magnet (3) is arranged in described mounting groove.
6. the permanent magnet wind power generator rotor as described in any one of claim 1-3, is characterized in that, described rotor core (4) adopts laminated structure or solid construction.
7. a permanent-magnetic wind driven generator, comprises rotor and stator, it is characterized in that, described rotor is the permanent magnet wind power generator rotor as described in any one of claim 1-6.
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| CN201210570749.0A CN102983649B (en) | 2012-12-25 | 2012-12-25 | Permanent-magnet wind power generator rotor and permanent-magnet wind power generator |
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| CN201210570749.0A CN102983649B (en) | 2012-12-25 | 2012-12-25 | Permanent-magnet wind power generator rotor and permanent-magnet wind power generator |
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| CN102983649B true CN102983649B (en) | 2015-06-17 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634631B (en) * | 2017-11-06 | 2019-07-26 | 合肥工业大学 | A two-stage Halbach permanent magnet motor with optimal magnetization angle |
| CN108964395A (en) * | 2018-09-26 | 2018-12-07 | 艾德斯汽车电机无锡有限公司 | A kind of permanent-magnet synchronous rimless motor of the rotor without silicon steel structure |
| CN109586440B (en) * | 2018-11-08 | 2020-09-15 | 南京航空航天大学 | Five-phase permanent magnet motor based on combined Halbach permanent magnet array |
| CN111030329A (en) * | 2019-11-29 | 2020-04-17 | 北京自动化控制设备研究所 | Multi-phase permanent magnet fault-tolerant servo motor |
| CN113359030A (en) * | 2021-06-09 | 2021-09-07 | 西安热工研究院有限公司 | Wind driven generator short circuit fault simulation platform based on external magnetic flux leakage detection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761130A (en) * | 2004-10-11 | 2006-04-19 | 中国科学院电工研究所 | A kind of permanent magnet synchronous motor |
| CN202068250U (en) * | 2011-05-30 | 2011-12-07 | 金华职业技术学院 | Magnet yoke in series connection |
| CN102738925A (en) * | 2011-04-01 | 2012-10-17 | 康弗蒂姆技术有限公司 | Magent retaining arrangements |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101816117B (en) * | 2007-08-01 | 2015-06-03 | 菲舍尔和佩克尔应用有限公司 | magnet element, rotor and its manufacture method, motor and electrical appliance comprising the motor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761130A (en) * | 2004-10-11 | 2006-04-19 | 中国科学院电工研究所 | A kind of permanent magnet synchronous motor |
| CN102738925A (en) * | 2011-04-01 | 2012-10-17 | 康弗蒂姆技术有限公司 | Magent retaining arrangements |
| CN202068250U (en) * | 2011-05-30 | 2011-12-07 | 金华职业技术学院 | Magnet yoke in series connection |
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