CN102104289A - Permanent-magnet motor rotor - Google Patents
Permanent-magnet motor rotor Download PDFInfo
- Publication number
- CN102104289A CN102104289A CN 201110061398 CN201110061398A CN102104289A CN 102104289 A CN102104289 A CN 102104289A CN 201110061398 CN201110061398 CN 201110061398 CN 201110061398 A CN201110061398 A CN 201110061398A CN 102104289 A CN102104289 A CN 102104289A
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- China
- Prior art keywords
- rotor
- protective sleeve
- permanent magnet
- motor
- permanent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 230000001012 protector Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical group [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a permanent-magnet motor rotor. The permanent-magnet motor rotor comprises a rotating shaft, a permanent magnet and a metal protective sleeve, wherein the permanent magnet is closely adhered to the surface of the rotating shaft; the metal protective sleeve wraps the permanent magnet; the surface of the metal protective sleeve is provided with a plurality of circumferential grooves; generally, the depth of each circumferential groove is 1/20 to 3/5 of the thickness of the protective sleeve; the width of the groove is 0.5 to 6 mm; and the mechanical strength of the protective sleeve of the rotor is not influenced. The circumferential grooves reserved on the protective sleeve of the rotor block axial channels of a rotor eddy current and reduce the loss of the rotor eddy current so as to reduce rotor heating. Simultaneously, the surface area of the protective sleeve of the rotor is larger so as to be more contributive to the radiating of the rotor; the temperature rising of the rotor of the motor can be reduced; and the efficiency of the motor is improved and the service life of the motor is prolonged.
Description
Technical field
The present invention relates to magneto, comprise permanent-magnet brushless DC electric machine and permagnetic synchronous motor, belong to the motor manufacturing technology field.
Background technology
Motor is the main driver part in the modern industry system, and the motor of excellent performance is most important to whole drive system.In recent years, along with the development of industrial technology, the occasion that high-speed electric expreess locomotive is used is extensive further, and high-speed permanent magnet motor since the characteristics of its high efficiency, high power density also come into one's own further.
Magneto operates under the high-speed case, and permanent magnet is because self structural strength is not enough, need add that to wrap up in one deck protective sleeve cracked to prevent it at it.Existing permanent magnet machine rotor comprises rotating shaft, is close to the protective sleeve (see figure 1) of the permanent magnet and the parcel permanent magnet on rotating shaft surface, and usually protection is with metal and nonconducting two kinds of material types such as nonmetal of conduction.Because high-speed electric expreess locomotive is in high-speed cruising, power frequency is than higher, the rotor eddy current loss that causes by harmonic current relatively in, slowspeed machine is higher, and the rotor radiating condition of motor is poor, so the rotor heating is comparatively serious.If the rotor protective sleeve uses nonmetallic materials, the coefficient of thermal expansion of nonmetallic materials and permanent magnet is different on the one hand, and protective sleeve may lose the protective effect to permanent magnet under the high temperature; Using nonmetallic materials to make the rotor protective sleeve on the other hand, generally all is to adopt artificial mode of twining, and processing technology is loaded down with trivial details, and production efficiency is low.Metal material does not have the problems referred to above, so use metal material to make the permanent magnet machine rotor protective sleeve on the general industry usually.Yet because metal material itself also conducts electricity, so also can produce eddy current loss on the rotor jacket, it plays certain electromagnetic shielding action to the permanent magnet and the rotating shaft of wrapping up in it simultaneously, therefore the eddy current loss on rotor jacket this moment will become the part of rotor eddy current loss maximum, be a big thermal source of rotor.How to reduce the eddy current loss of rotor jacket, reduce rotor heating and become the key issue that such profile is pasted the formula high speed rotor of motor.
Summary of the invention
The purpose of this invention is to provide a kind of rotor eddy current loss that helps reducing, reduce the permanent magnet machine rotor of rotor heating.
Permanent magnet machine rotor of the present invention comprises rotating shaft, is close to the permanent magnet on rotating shaft surface and the metal protection protector of parcel permanent magnet, it is characterized in that the surface of metal protection protector has some circumferential slots.
Usually, the degree of depth of above-mentioned circumferential slot is 1/20 to 3/5 of a protective sleeve thickness, and the width of groove is that 0.5mm is to 6mm.
For easy to process, can make some circumferential slots equidistant.
The invention has the advantages that
1. the circumferential slot of opening on the rotor protective sleeve does not influence the mechanical strength of rotor jacket, still can provide enough stress support for permanent magnet behind the fluting.
2. on the rotor protective sleeve, open circumferential slot, blocked the axial passage of rotor eddy current, reduced rotor eddy current loss, thereby reduced rotor heating; In this simultaneously, the rotor jacket surface area strengthens, and more helps the heat radiation of rotor, has therefore reduced the rotor temperature rise, has improved efficiency of motor and useful life.
Description of drawings
Fig. 1 is existing rotor structure for permanent magnet motor schematic diagram;
Fig. 2 is a rotor structure for permanent magnet motor schematic diagram of the present invention.
Among the figure, 1 is rotating shaft, and 2 is permanent magnet, and 3 is protective sleeve.
Embodiment
With reference to Fig. 2, permanent magnet machine rotor comprises rotating shaft 1, is close to the permanent magnet 2 on rotating shaft 1 surface and the metal protection protector 3 of parcel permanent magnet 2, and the surface of metal protection protector 3 has some circumferential slots.Circumferential slot is equidistant in the legend.
The present invention is applicable to permanent-magnet brushless DC electric machine and permagnetic synchronous motor.Permanent magnet is neodymium iron boron, SmCo or ferrite.
Claims (3)
1. permanent magnet machine rotor comprises rotating shaft (1), is close to the permanent magnet (2) on rotating shaft (1) surface and the metal protection protector (3) of parcel permanent magnet (2), it is characterized in that the surface of metal protection protector (3) has some circumferential slots.
2. permanent magnet machine rotor according to claim 1, the degree of depth that it is characterized in that circumferential slot are 1/20 to 3/5 of protective sleeve thickness, and the width of groove is that 0.5mm is to 6mm.
3. permanent magnet machine rotor according to claim 1 is characterized in that some circumferential slots are equidistant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201110061398 CN102104289A (en) | 2011-03-15 | 2011-03-15 | Permanent-magnet motor rotor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201110061398 CN102104289A (en) | 2011-03-15 | 2011-03-15 | Permanent-magnet motor rotor |
Publications (1)
Publication Number | Publication Date |
---|---|
CN102104289A true CN102104289A (en) | 2011-06-22 |
Family
ID=44156878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201110061398 Pending CN102104289A (en) | 2011-03-15 | 2011-03-15 | Permanent-magnet motor rotor |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102104289A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103368290A (en) * | 2012-03-26 | 2013-10-23 | 阿尔斯通技术有限公司 | Rotor for electric machine |
CN103595204A (en) * | 2013-10-17 | 2014-02-19 | 泰豪科技股份有限公司 | Double-stator permanent magnet hub motor |
CN104377859A (en) * | 2014-11-23 | 2015-02-25 | 沈阳工业大学 | Rotor of high-speed permanent magnet motor |
CN105356634A (en) * | 2015-12-09 | 2016-02-24 | 南京磁谷科技有限公司 | Composite sealing sheath for isolating rotor in magnetic suspension motor |
CN107612166A (en) * | 2017-09-22 | 2018-01-19 | 沈端劼 | A kind of rotor with stacked protective metal shell |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1976096A2 (en) * | 2007-03-27 | 2008-10-01 | Hamilton Sundstrand Corporation | Segmented permanent magnet rotor for high speed synchronous machines |
CN101316058A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨理工大学 | Rotor protection sleeve of high speed permanent magnet motor |
CN101316057A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨理工大学 | High speed permanent magnet motor rotor |
KR20090070193A (en) * | 2007-12-27 | 2009-07-01 | 한국전기연구원 | Rotor for high speed permanent magnet machine |
CN201966710U (en) * | 2011-03-15 | 2011-09-07 | 浙江大学 | Permanent magnet motor rotor |
-
2011
- 2011-03-15 CN CN 201110061398 patent/CN102104289A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1976096A2 (en) * | 2007-03-27 | 2008-10-01 | Hamilton Sundstrand Corporation | Segmented permanent magnet rotor for high speed synchronous machines |
KR20090070193A (en) * | 2007-12-27 | 2009-07-01 | 한국전기연구원 | Rotor for high speed permanent magnet machine |
CN101316058A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨理工大学 | Rotor protection sleeve of high speed permanent magnet motor |
CN101316057A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨理工大学 | High speed permanent magnet motor rotor |
CN201966710U (en) * | 2011-03-15 | 2011-09-07 | 浙江大学 | Permanent magnet motor rotor |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103368290A (en) * | 2012-03-26 | 2013-10-23 | 阿尔斯通技术有限公司 | Rotor for electric machine |
CN103595204A (en) * | 2013-10-17 | 2014-02-19 | 泰豪科技股份有限公司 | Double-stator permanent magnet hub motor |
CN103595204B (en) * | 2013-10-17 | 2016-03-23 | 泰豪科技股份有限公司 | A kind of Double-stator permanent magnet hub motor |
CN104377859A (en) * | 2014-11-23 | 2015-02-25 | 沈阳工业大学 | Rotor of high-speed permanent magnet motor |
CN105356634A (en) * | 2015-12-09 | 2016-02-24 | 南京磁谷科技有限公司 | Composite sealing sheath for isolating rotor in magnetic suspension motor |
CN105356634B (en) * | 2015-12-09 | 2018-03-16 | 南京磁谷科技有限公司 | Isolate the compound seal sheath of rotor in magnetic suspension motor |
CN107612166A (en) * | 2017-09-22 | 2018-01-19 | 沈端劼 | A kind of rotor with stacked protective metal shell |
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C06 | Publication | ||
PB01 | Publication | ||
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SE01 | Entry into force of request for substantive examination | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110622 |