CN102104289A - Permanent-magnet motor rotor - Google Patents

Permanent-magnet motor rotor Download PDF

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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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CN
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
Application number
CN 201110061398
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Chinese (zh)
Inventor
沈建新
郝鹤
金孟加
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN 201110061398 priority Critical patent/CN102104289A/en
Publication of CN102104289A publication Critical patent/CN102104289A/en
Pending legal-status Critical Current

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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

Permanent magnet machine rotor
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.
CN 201110061398 2011-03-15 2011-03-15 Permanent-magnet motor rotor Pending CN102104289A (en)

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

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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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20110622