CN102738910A - Bonded permanent magnet for large direct-drive permanent-magnet generator - Google Patents
Bonded permanent magnet for large direct-drive permanent-magnet generator Download PDFInfo
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- CN102738910A CN102738910A CN2012102543643A CN201210254364A CN102738910A CN 102738910 A CN102738910 A CN 102738910A CN 2012102543643 A CN2012102543643 A CN 2012102543643A CN 201210254364 A CN201210254364 A CN 201210254364A CN 102738910 A CN102738910 A CN 102738910A
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Abstract
The invention relates to a bonded permanent magnet for a large direct-drive permanent-magnet generator. The permanent magnet is formed by bonding a plurality of small permanent magnets. Since each permanent magnet group is formed by bonding a plurality of permanent magnets, the surface eddy, heat and thermal loss of the permanent magnets can be effectively reduced; in consideration of the requirements for salt-fog resistance and humidity-heat resistance in the overall operating environment of a wind-driven generator set, the coating thereof can ensure that the permanent magnets can meet the operating requirements under severe environmental conditions and can not cause the inter-layer conduction of the permanent magnets; and epoxy glue used for bonding the permanent magnets has fine insulating properties such as high temperature resistance, convenient curing process, high dielectric property, surface creepage resistance and arc resistance. In use, the invention can effectively ensure assembling requirements, can achieve the technical requirement effect and can be widely used for permanent magnets of various large permanent-magnet generators.
Description
Technical field
The present invention relates to a kind of permanent magnet of large-scale magneto, particularly relate to a kind of adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator.
Background technology
At present, wind power generation generator special forward high reliability, low maintenance, reduce assembly, reduce cost, efficient is high, integrated level is high direction develops, general trend is that single-machine capacity constantly increases.In recent years, the generator that directly drives with non-brushing more and more receives publicity.Along with continually developing and extensive use of direct drive permanent magnetic generator on the wind power generation; Nd-Fe-B permanent magnet (hereinafter to be referred as permanent magnet) is able to a large amount of uses as the critical piece in the permanent magnet generator, and the assembling form of permanent magnet becomes an important link in the magneto manufacturing processing.
The permanent magnet of direct drive permanent magnetic generator all is the assemblings of monoblock permanent magnet on the existing wind power generation, and its assembling form comprises: the monoblock permanent magnet directly sticks on rotor surface; Or the monoblock permanent magnet is embedded in the cover box, will overlap box again and paste or be inserted in and need the position of assembling.The permanent magnet that is assemblied in the direct drive permanent magnetic generator need have higher salt spray resistance, humidity resistance.In addition, the too high meeting of the temperature of permanent magnet causes the irreversible demagnetization of permanent magnet, and generator performance is brought huge infringement.
Therefore; How to found and a kind ofly can reduce the permanent magnet surfaces eddy current effectively, reduce heat, reduce thermal losses; Can satisfy the instructions for use under severe environmental conditions; Can not cause the permanent magnet interlayer conduction, and can effectively guarantee the new adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator of matching requirements, real one of the current important research and development problem that belongs to.
Summary of the invention
The technical problem that the present invention will solve provides a kind of adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator; Make it can reduce the permanent magnet surfaces eddy current effectively; Reduce heat, reduce thermal losses, can satisfy the instructions for use under severe environmental conditions; The permanent magnet interlayer conduction can be do not caused, and matching requirements can be effectively guaranteed.
For solving the problems of the technologies described above, a kind of adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator of the present invention, described permanent magnet are by bonding the forming of the little permanent magnet of polylith.
As a kind of improvement of the present invention, described every little permanent magnet outer surface is provided with monel coating.
Described every little permanent magnet also is provided with epoxy coating outside monel coating.
The little permanent magnet of described polylith is bonding through epoxy glue.
After adopting such design, the present invention has the following advantages:
1, the present invention can reduce the permanent magnet surfaces eddy current effectively by every group of permanent magnet of the bonding one-tenth of polylith permanent magnet, reduces heat, reduces thermal losses;
2, the present invention considers salt spray resistance, the humidity resistance requirement of wind-powered electricity generation unit overall operation environment, and its coating can guarantee that the permanent magnetism physical efficiency satisfies the instructions for use under severe environmental conditions and can not cause permanent magnet to be corroded and interlayer conduction;
3, the bonding employed epoxy glue of polylith permanent magnet of the present invention has superior isolation performance high temperature resistant, that solidify convenience, high dielectric property, anti-surface leakage, anti-electric arc;
4, the present invention can guarantee matching requirements in use effectively, reaches the specification requirement effect, can be widely used in the permanent magnet of various large-scale permanent magnet generatores.
Description of drawings
Above-mentioned only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
Fig. 1 is a kind of structural representation that is used for the adhesion type permanent magnet of large-scale direct drive permanent magnetic generator of the present invention.
Embodiment
See also shown in Figure 1ly, a kind of adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator of the present invention is by little permanent magnet 1 bonding the forming of polylith.
Further; Every little permanent magnet 1 outer surface is provided with ambrose alloy and adds epoxy coating 2; Be permanent magnet 1 surface plating one deck monel coating earlier, treat that the plating of monel coating is good after, increase one deck epoxy coating again; The coating of two-layer different attribute can guarantee that permanent magnet has the antiseptic property of good salt spray resistance, moisture-proof heat, better guarantees the service life of permanent magnet generator.
Bonding between the little permanent magnet 1 behind the coating through epoxy glue 3; The curing characteristics of epoxy glue 3 can guarantee every group of form and position tolerance and the dimensional tolerance that permanent magnet is higher in bonding back, and epoxy glue 3 characteristics high temperature resistant, that shearing force is strong can guarantee design performance and the normally use of every group of permanent magnet in the running of permanent magnet generator after bonding.
Adhesion type permanent magnet combination of the present invention adopts the permanent magnet of polylith bonding way can reduce eddy current effect, reduces heat, is beneficial to the thermal losses that reduces permanent magnet generator, reduces temperature rise.Permanent magnet surfaces adopts ambrose alloy to add epoxy coating and has guaranteed permanent magnet surfaces favorable protection performance, has guaranteed the service life of permanent magnet generator.Bonding its performance of the epoxy glue of selecting for use of permanent magnet has guaranteed every group of form and position tolerance and the dimensional tolerance that permanent magnet is higher in bonding back behind the coating, has guaranteed the bonding integrality of every group of permanent magnet afterwards under the running status of the big torque of permanent magnet generator and high temperature.Service condition of the present invention is succinct, is beneficial to adjustment, and efficiency ground guarantees designing requirement, reaches the specification requirement effect, can choose the quantity of bonding monolithic permanent magnet according to the size of required permanent magnet, is suitable for the use of the permanent magnet of satisfactory all high-rating generators.
Above-mentioned each embodiment only is used to explain the present invention; The quantity of each parts, structure, size, the position is set and shape all can change to some extent; On the basis of technical scheme of the present invention; All improvement and equivalents of individual component being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.
Claims (4)
1. an adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator is characterized in that described permanent magnet is by bonding the forming of the little permanent magnet of polylith.
2. a kind of adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator according to claim 1 is characterized in that described every little permanent magnet outer surface is provided with monel coating.
3. a kind of adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator according to claim 2 is characterized in that described every little permanent magnet outside monel coating, also is provided with epoxy coating.
4. according to each described a kind of adhesion type permanent magnet that is used for large-scale direct drive permanent magnetic generator among the claim 1-3, it is characterized in that the little permanent magnet of described polylith is bonding through epoxy glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102543643A CN102738910A (en) | 2012-07-20 | 2012-07-20 | Bonded permanent magnet for large direct-drive permanent-magnet generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102543643A CN102738910A (en) | 2012-07-20 | 2012-07-20 | Bonded permanent magnet for large direct-drive permanent-magnet generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102738910A true CN102738910A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102543643A Pending CN102738910A (en) | 2012-07-20 | 2012-07-20 | Bonded permanent magnet for large direct-drive permanent-magnet generator |
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| CN (1) | CN102738910A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425628A (en) * | 2016-05-26 | 2017-12-01 | 包头金山磁材有限公司 | A kind of magneto magnet and production method for reducing eddy-current heating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002078257A (en) * | 2000-08-24 | 2002-03-15 | Mitsubishi Electric Corp | Motor and rotor thereof |
| CN102031052A (en) * | 2009-09-29 | 2011-04-27 | 沈阳刘后地电镀有限公司 | Neodymium iron boron rare earth permanent magnet surface coating and application method thereof |
| CN102041506A (en) * | 2009-10-13 | 2011-05-04 | 北京中科三环高技术股份有限公司 | Surface treatment method of permanent magnet material |
| CN202712987U (en) * | 2012-07-20 | 2013-01-30 | 国电联合动力技术有限公司 | Bonded-type permanent magnet for large direct-driven permanent magnet generator |
-
2012
- 2012-07-20 CN CN2012102543643A patent/CN102738910A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002078257A (en) * | 2000-08-24 | 2002-03-15 | Mitsubishi Electric Corp | Motor and rotor thereof |
| CN102031052A (en) * | 2009-09-29 | 2011-04-27 | 沈阳刘后地电镀有限公司 | Neodymium iron boron rare earth permanent magnet surface coating and application method thereof |
| CN102041506A (en) * | 2009-10-13 | 2011-05-04 | 北京中科三环高技术股份有限公司 | Surface treatment method of permanent magnet material |
| CN202712987U (en) * | 2012-07-20 | 2013-01-30 | 国电联合动力技术有限公司 | Bonded-type permanent magnet for large direct-driven permanent magnet generator |
Non-Patent Citations (1)
| Title |
|---|
| 岳明等: "烧结NdFeB 永磁合金的腐蚀行为研究及进展", 《第五届中国功能材料及其应用学术会议论文集Ⅰ》, vol. 35, 31 December 2004 (2004-12-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425628A (en) * | 2016-05-26 | 2017-12-01 | 包头金山磁材有限公司 | A kind of magneto magnet and production method for reducing eddy-current heating |
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Application publication date: 20121017 |