CN103166351A - Rotor for an electric motor - Google Patents
Rotor for an electric motor Download PDFInfo
- Publication number
- CN103166351A CN103166351A CN2012105506186A CN201210550618A CN103166351A CN 103166351 A CN103166351 A CN 103166351A CN 2012105506186 A CN2012105506186 A CN 2012105506186A CN 201210550618 A CN201210550618 A CN 201210550618A CN 103166351 A CN103166351 A CN 103166351A
- Authority
- CN
- China
- Prior art keywords
- rotor
- space
- protection pipe
- sections
- contact pin
- 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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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to a rotor particularly for a brushless and permanent magnet-excited electric motor (2), comprising a rotor protecting pipe (4) with at least two annular segments (7), wherein the segments are manually limited to reduce eddy, the two segments (7) are manually limited by a complete circumference arrangement sequence (8) of gaps (9) and connecting pieces(10), each connecting piece (10) respectively connects the two adjacent segments (7) between two gaps (9), and the rotor protective pipe are manufactured to be an integration body.
Description
Technical field
The present invention relates to a kind of rotor that is used for motor with rotor protection pipe.The present invention relates in addition a kind of motor with brushless permanent-magnet-field of rotor.
Background technology
The rotor of the motor of permanent-magnet-field generally has a plurality of utmost points by the permanent magnet structure.Described permanent magnet often sticks on described rotor at this.When centrifugal force occurring in described motor, permanent magnet or its fragment may get loose thus.Therefore the rotor protection pipe generally is installed on described rotor.But the eddy current formation in described rotor protection pipe can bring problem.Described eddy current formation in the rotor protection pipe can cause reducing the efficient of motor and cause the heating of rotor protection pipe and thereupon tensioning thus.
Fig. 1 shows the side face according to the expansion of background technology rotor protection pipe 20.Draw unified coordinate system in whole accompanying drawings of this specification.Described coordinate system shows about rotor circumferential direction θ, axial direction z and the radial direction r of whole motor in other words.Fig. 1 shows the trend of the eddy current 21 that produces in rotor protection pipe 20.Described eddy current 21 is in axial direction z extension basically.
Fig. 2 shows for reducing in the eddy current 21 of rotor protection pipe 20 known scheme before this.General described rotor protection pipe 20 is divided into single, independent sections 22 along defiber 23.Intactly be separated into four single, disjunct rings each other at this rotor protection pipe 20.Described known solution before this not only in the mill and all very bothersome in assembling because must make and assemble independent sections 22.
Summary of the invention
Have according to the present invention the rotor protection pipe the feature with claim 1 rotor make and assembling in all very convenient.Whole rotor protection pipe manufacturer is integrated, thereby only must parts of assembling.The eddy current that can reduce significantly in the rotor protection pipe according to the rotor protection pipe of rotor of the present invention simultaneously forms.Improve thus the efficient of motor and avoid heating and the corresponding tensioning of rotor protection pipe.All these advantages realize according to rotor of the present invention (comprising the rotor protection pipe) the motor by being used for brushless permanent-magnet-field particularly.Described rotor protection pipe has at least two in order to reduce the sections of the annular that eddy current limits mutually.The restriction of described at least two sections is by the collating sequence realization of the full circumferences of space and contact pin, and wherein said contact pin connects two adjacent sections between two spaces respectively.Sections by the described annular of described contact pin interconnects and described rotor protection pipe is fabricated to one thus.Described contact pin is constructed as far as possible littlely and only is used for the sections of single annular is interfixed.Interrupt as far as possible and stop thus eddy current between the sections of two annulars therein by described space.Described space is continuous hole in described rotor protection pipe.Formed by plate stamping or shearing in space described in manufacture process especially.Subsequently the rotor protection pipe is rolled and be welded into to described sheet material.
Dependent claims shows the preferred improvement project of the present invention.
Comprise a plurality of utmost points by the permanent magnet structure at rotor described in preferred design, wherein said rotor protection pipe is arranged in un-rotatably describedly extremely to be gone up.Particularly preferably described collating sequence comprises at least 1 to 5 for each utmost point, special 1 to 2 a space and contact pin is arranged at described space among.1 to 5 of described each utmost point, special 1 to 2 space is provided for the collating sequence of a full circumferences.As explanation afterwards, described rotor protection pipe also can be divided into by the collating sequence more than two full circumferences the sections more than two annulars.In this case preferably wherein each collating sequence comprise 1 to 5 of each utmost point, special 1 to 2 space.
Stipulating in preferred design, described space along the first length of circumferential direction greater than second length of described contact pin along circumferential direction.Guarantee that thus described contact pin is enough short in to avoid the flowing of eddy current between the sections of two adjacent annulars.Special provision, described the first length doubles at least, is three times in especially at least described the second length.
Preferred described space along the first length of circumferential direction greater than described space width in axial direction.Described space is configured to long and narrow opening thus.Described long and narrow opening extends along the circumferential direction of rotor protection pipe.
In addition preferably the regulation, described space width in axial direction at 0.5mm between 5mm, especially at 1mm between 3mm.By the space in axial direction the width of less guarantee that described rotor protection sucker enough keeps overall stability and still reduce fully eddy current forming.
Stipulate in preferred design, described rotor protection pipe comprises the sections more than two annulars.The collating sequence of the full circumferences by space and contact pin limits respectively at the sections of these every two adjacent annulars.Described rotor protection pipe is in axial direction wider, just needs the sections of more single annular effectively to suppress eddy current formation.
Preferably stipulate in addition, the space of two adjacent collating sequences is mutually arranged with being shifted, thereby is in axial direction seen not alignment of described contact pin.Special provision, every second collating sequence have been moved the space along half of the first length of circumferential direction.
Preferably stipulate in addition, the side face of described rotor protection pipe is symmetrical about the center line that in axial direction extends under deployed condition.Described center line is positioned at the center of the side face of rotor protection pipe at this.Preferably stipulate in addition, each space is surrounded by the material of described rotor protection pipe fully.In other words, there is no the space is that the side is opened wide.Can guarantee that thus the side face of described rotor protection pipe has the outer seamed edge of continuous sealing.When being shifted the ground layout when one in collating sequence along circumferential direction especially, this can cause only having at the two ends of the side face of described rotor protection pipe the space of half length.To make the sleeve pipe of balance now, preferably to the average space of the collating sequence of described displacement structure, for example two minutes.Rotor protection pipe for the structure balance provides different schemes at last.So joint provisions, the side face of described rotor protection pipe is symmetrical about the center line that in axial direction extends under deployed condition.
The present invention comprises having the motor of the brushless permanent-magnet-field of the rotor of explanation just now in addition.Described corresponding advantageously being applied in according on motor of the present invention of favourable design about the rotor explanation.
Description of drawings
The below describes embodiments of the invention with reference to the accompanying drawings in detail.This illustrate:
Fig. 1 shows a side face according to the rotor protection pipe of background technology,
Fig. 2 shows another side face according to the rotor protection pipe of background technology,
Fig. 3 show according to whole embodiment have according to rotor of the present invention according to motor of the present invention,
Fig. 4 shows the detail view of Fig. 3,
Fig. 5 shows the side face according to the rotor protection pipe of rotor of the present invention according to first embodiment,
Fig. 6 shows the side face according to the rotor protection pipe of rotor of the present invention according to second embodiment,
Fig. 7 shows the side face according to the rotor protection pipe of rotor of the present invention according to the 3rd embodiment,
Fig. 8 shows the side face according to the rotor protection pipe of rotor of the present invention according to the 4th embodiment.
Embodiment
Introduce structure according to brushless, the motor 2 permanent-magnet-field with rotor 1 of whole embodiment according to Fig. 3 and 4 subsequently.
Fig. 3 shows the axial cross section of motor 2.Described motor 2 comprises rotor 1 and stator 3.Described rotor 1 is rotatably installed on armature spindle 5.There are a plurality of utmost points 6 on the excircle of rotor 1.The described utmost point 6 is constructed by permanent magnet.In order to guarantee that the described utmost point 6 is fixed on described rotor 1 reliably, described rotor 1 comprises rotor protection pipe 4.
Fig. 4 shows the detailed cross sectional view of Fig. 3.Easily see at this, how described rotor protection pipe 4 is nonrotatably mounted tO on described rotor 1 and fixes thus the described utmost point 6.
Unified coordinate system shows circumferential direction θ in whole accompanying drawings, and it is corresponding to the direction of rotation of rotor 1.Axial direction z along armature spindle 5 extends perpendicular to circumferential direction θ.Radial direction r extends perpendicular to circumferential direction θ and direction z perpendicular to axial direction.
Fig. 5 shows the side face according to the expansion of the rotor protection pipe 4 of first embodiment.Described rotor protection pipe comprises the sections 7 of four annulars.The sections 7 of the annular that described difference is adjacent limits each other by the collating sequence 8 of space 9 and contact pin 10.The described collating sequence that replaces 8 extends along circumferential direction θ on full circumferences.In the example that illustrates herein, each collating sequence 8 has ten spaces 9.Every three in axial direction the space 9 that is arranged side by side of z consist of coverage rates 11.Each in confined state in coverage rate 11 be in a utmost point 6 above.Corresponding contact pin 10 is extended between two of the rotor 1 adjacent utmost points 6 respectively.
All space 9 is all constructed the same greatly with contact pin 10 in first embodiment.Described space 9 has the first length 13 of measuring along circumferential direction θ.Described contact pin 10 has the second length 14 of measuring along circumferential direction θ.Described the first length 13 is obviously greater than described the second length 14.Described space 9 has the width 12 of in axial direction z measurement in addition.Described width 12 length to 5mm, arrive 3mm at 1mm at 0.5mm especially.
Fig. 6 shows the side face according to the rotor protection pipe 4 of the second embodiment.The parts that identical function in other words is identical are all arranging same Reference numeral in embodiment.Be divided into the sections 7 of eight annulars at rotor protection pipe 4 described in second embodiment.The collating sequence 8 that space 9 and contact pin 10 are arranged respectively between the sections 7 of described annular.With just the same in first embodiment, space 9 is also the same large respectively with contact pin 10 in second embodiment.By seven spaces, 9 structures, described space in axial direction z is arranged side by side the coverage rate 11 of a utmost point 6 at this.
Fig. 7 shows the side face according to the 3rd embodiment rotor protection pipe 4.The parts that identical function in other words is identical are all arranging same Reference numeral in embodiment.Just the same with first embodiment, the 3rd embodiment comprises the sections 7 of four annulars with corresponding three collating sequences 8.Collating sequence 8 in the middle of in the 3rd embodiment has moved half of the first length 13 along circumferential direction θ.In axial direction z observes thus, and contact pin 10 is no longer alignd.The movement of the collating sequence 8 of described centre can further reduce the eddy current between the sections 7 of single annular.
Fig. 7 shows the outer seamed edge 15 of the side face of rotor protection pipe 4 in addition.In order to make the rotor protection pipe 4 of having completed, roll shown side face and seamed edge 15 places welding outside.Be in this special advantage, described outer seamed edge 15 is continuous and is not interrupted by space 9.Therefore the collating sequence 8 of displacement is arranged described short space 16, two short spaces 16. to be approximately half of remaining space 9 along the length of circumferential direction θ long at described outer seamed edge 15 places.For the revolving property of the balance that reaches rotor protection pipe 4 and whole rotor 1, arrange two short spaces 16 equally at the center of the side face of described rotor protection pipe 4.16 guarantee that the side face of described rotor protection pipes 4 is symmetrical about the center line 17 that draws by described in two of the center short spaces.By the structure of described symmetry, the revolving property of balance is possible.Described center line 17 is parallel to axial direction z and extends and be in center between two outer seamed edges 15 of side face of rotor protection pipe 4.
Fig. 8 shows the side face according to the 4th embodiment rotor protection pipe 4.The parts that identical function in other words is identical are all arranging same Reference numeral in embodiment.Be configured with the sections 7 of eight annulars in Fig. 8.Correspondingly described embodiment has the collating sequence 8 of seven spaces 9 and contact pin 10.Every second collating sequence 8 moved half of the first length 13 along circumferential direction θ.In order to guarantee that outer seamed edge 15 is continuous, the space that the collating sequence that has moved is positioned at the outside is configured to short space 16 again.For the revolving property of the balance center at the side face of rotor protection pipe 4 in the collating sequence 8 that has moved arranges short space 16.
The embodiment that introduces shows whole side faces of the rotor protection pipe 4 that is configured to one.The sections 7 of single annular limits mutually by collating sequence 8.Further avoid thus forming eddy current in rotor protection pipe 4.Test shows, can reach and similarly according to the rotor protection pipe 20 of background technology shown in figure 2 reduce the effect that eddy current forms according to the rotor protection pipe 4 of first embodiment.Be integrated and therefore only must assemble parts according to rotor protection pipe manufacturer of the present invention.This can produce huge cost advantage with respect to known before this structure.
Claims (11)
1. be used for the particularly rotor (1) of brushless, motor permanent-magnet-field (2), comprise:
-having the rotor protection pipe (4) of the sections (7) of at least two annulars, described sections limits to reduce eddy current mutually,
-wherein said two sections (7) limit mutually by the collating sequence (8) of the full circumferences of space (9) and contact pin (10),
-wherein said contact pin (10) connects respectively described two adjacent sections (7) between two spaces (9), and
-wherein said rotor protection pipe (4) is fabricated to one.
2. by rotor claimed in claim 1, it is characterized in that a plurality of utmost points (6) by the permanent magnet structure, wherein said rotor protection pipe (4) is arranged on the described utmost point (6) un-rotatably.
3. by rotor claimed in claim 2, it is characterized in that, described collating sequence (8) comprises at least 1 to 5 for each utmost point (6), special 1 to 2 space (9), and at described space (9) among, a contact pin (10) is arranged.
4. by the described rotor of any one in aforementioned claim, it is characterized in that, described space (9) along first length (13) of circumferential direction (θ) greater than second length (14) of described contact pin along circumferential direction, wherein described the first length (13) doubles at least especially, is three times in especially at least described the second length (14).
5. by the described rotor of any one in aforementioned claim, it is characterized in that, described space (9) along first length (13) of circumferential direction (θ) greater than described space (9) width of (z) (12) in axial direction.
6. by the described rotor of any one in aforementioned claim, it is characterized in that, described space (9) in axial direction the width of (z) (12) at 0.5mm between 5mm, especially at 1mm between 3mm.
7. by the described rotor of any one in aforementioned claim; it is characterized in that; described rotor protection pipe (4) comprises the sections (7) of at least one other annular, and other the collating sequence (8) of full circumferences of the sections (7) of wherein said at least one other annular by space (9) and contact pin (10) is with respect to adjacent sections restriction.
8. by rotor claimed in claim 7, it is characterized in that, the space (9) of described two adjacent collating sequences (8) is arranged on displacement ground mutually, thereby in axial direction (z) sees not alignment of described contact pin (10).
9. by the described rotor of any one in aforementioned claim, it is characterized in that the side face of described rotor protection pipe (4) center line (17) symmetry that (z) extends about in axial direction under deployed condition.
10. by the described rotor of any one in aforementioned claim, it is characterized in that, each space (9) are surrounded by the material of described rotor protection pipe (4) on full circumferences.
11. motor brushless, permanent-magnet-field (2) has by the described rotor of any one (1) in aforementioned claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011089058A DE102011089058A1 (en) | 2011-12-19 | 2011-12-19 | Rotor for brushless permanent magnet electric machine, has two annular portions that are separated by lining structure in which recesses and ridges are provided |
| DE102011089058.0 | 2011-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103166351A true CN103166351A (en) | 2013-06-19 |
Family
ID=48521811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105506186A Pending CN103166351A (en) | 2011-12-19 | 2012-12-18 | Rotor for an electric motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103166351A (en) |
| DE (1) | DE102011089058A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556811A (en) * | 2014-05-30 | 2016-05-04 | 铃木株式会社 | Generator for motorcycle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3179606A1 (en) * | 2015-12-08 | 2017-06-14 | ABB Schweiz AG | A rotor for an electric machine |
| GB201714242D0 (en) | 2017-09-05 | 2017-10-18 | Rolls Royce Plc | Electrical machine rotor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846856A (en) * | 1981-09-11 | 1983-03-18 | Hitachi Ltd | Permanent magnet rotor |
| JPH07284238A (en) * | 1994-04-06 | 1995-10-27 | Aichi Emerson Electric Co Ltd | Magnet rotor |
| JPH08163803A (en) * | 1994-12-06 | 1996-06-21 | Fuji Electric Co Ltd | Permanent magnet synchronous motor |
| CN100454730C (en) * | 2001-05-22 | 2009-01-21 | Lg电子株式会社 | Reciprocating motor |
| JP2011166952A (en) * | 2010-02-10 | 2011-08-25 | Fuji Electric Co Ltd | Permanent magnet rotary machine |
-
2011
- 2011-12-19 DE DE102011089058A patent/DE102011089058A1/en not_active Withdrawn
-
2012
- 2012-12-18 CN CN2012105506186A patent/CN103166351A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846856A (en) * | 1981-09-11 | 1983-03-18 | Hitachi Ltd | Permanent magnet rotor |
| JPH07284238A (en) * | 1994-04-06 | 1995-10-27 | Aichi Emerson Electric Co Ltd | Magnet rotor |
| JPH08163803A (en) * | 1994-12-06 | 1996-06-21 | Fuji Electric Co Ltd | Permanent magnet synchronous motor |
| CN100454730C (en) * | 2001-05-22 | 2009-01-21 | Lg电子株式会社 | Reciprocating motor |
| JP2011166952A (en) * | 2010-02-10 | 2011-08-25 | Fuji Electric Co Ltd | Permanent magnet rotary machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556811A (en) * | 2014-05-30 | 2016-05-04 | 铃木株式会社 | Generator for motorcycle |
| CN105556811B (en) * | 2014-05-30 | 2018-01-09 | 铃木株式会社 | Motorcyrle generator |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011089058A1 (en) | 2013-06-20 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130619 |
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| WD01 | Invention patent application deemed withdrawn after publication |