CN102761220A - Magnet-embedded rotary motor - Google Patents
Magnet-embedded rotary motor Download PDFInfo
- Publication number
- CN102761220A CN102761220A CN2012100273584A CN201210027358A CN102761220A CN 102761220 A CN102761220 A CN 102761220A CN 2012100273584 A CN2012100273584 A CN 2012100273584A CN 201210027358 A CN201210027358 A CN 201210027358A CN 102761220 A CN102761220 A CN 102761220A
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- rotor
- magnet
- permanent magnet
- electric rotating
- rotating machine
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention provides a magnet-embedded rotary motor which promotes miniaturization, and is capable of improving efficiency through reduction of leakage flux on the side of a rotor. The magnet-embedded rotary motor comprises a stator and the roughly cylindrical rotor supported to be capable of rotating freely. The magnet-embedded rotary motor is characterized in that on the side of the rotor, permanent magnets magnetized axially are disposed on magnetic poles except for permanent magnets forming the magnetic poles.
Description
Technical field
The present invention relates to a kind of magnet baried type electric rotating machine.
Background technology
In magnet baried type electric rotating machine in the past, exist like lower rotating electrical machine, though on the outer cylinder face of the rotor of general cylindrical shape magnetic poles, but still on rotor side surface mounting permanent magnet (for example with reference to patent documentation 1).
In Fig. 1 of patent documentation 1, the magnet baried type electric rotating machine of mounting permanent magnet on rotor side surface is shown.Use this permanent magnet for magnetic poles on the outer cylinder face of rotor.
In other magnet baried type electric rotating machines in the past, exist like lower rotating electrical machine, concentrate by the magnetic flux that permanent magnet produced that is arranged in the rotor core, realize high performance (for example with reference to patent documentation 2).
In Fig. 2 of patent documentation 2, the structure that on each magnetic pole of rotor core, possesses the rotor that roughly is 2 relative permanent magnets of V word shape ground is shown.Because make same pole face-to-face and mounting permanent magnet, therefore the flux concentrating of 2 relative permanent magnets increases the magnetic flux density in gap on the magnetic pole piece surface of rotor core, advances the minitype high-performanceization of magnet baried type electric rotating machine.
Like this, used the permanent magnet that in magnet baried type electric rotating machine in the past, uses for the magnetic pole that constitutes rotor.
Patent documentation 1: the spy of Japan opens the 2008-029130 communique
Patent documentation 2: the spy of Japan opens the 2010-074975 communique
But, in the permanent magnet of on the rotor of in the past magnet baried type electric rotating machine, installing, do not have the permanent magnet that is provided with in order to reduce the eddy current loss of on approaching carriage, bringing out from the leakage flux of rotor side surface.
Be used in the magnet baried type electric rotating machine in industrial motor, the EV motor etc., need further to realize miniaturization, high efficiency from now on.Imagine following method as the method that advances miniaturization, use the magnet baried type electric rotating machine of the flux concentrating type shown in the patent documentation 2 more and dwindle rotor and carriage between the space.Because flux concentrating and increasing from the leakage flux of rotor side surface, the eddy current loss of on approaching carriage, bringing out simultaneously increases.In order to advance high efficiency, need to reduce said eddy current loss.
Summary of the invention
So, the object of the present invention is to provide a kind of magnet baried type electric rotating machine, it can advance miniaturization, also can advance high efficiency through the leakage flux that reduces from rotor side surface simultaneously.
In order to solve above-mentioned problem, according to 1 viewpoint of the present invention, use like lower magnet baried type electric rotating machine, possessing: stator; And in the magnet baried type electric rotating machine of the rotor of the general cylindrical shape that supports freely of rotation, it is characterized by, on rotor side surface, be different from the permanent magnet of magnetic poles and on each magnetic pole, also be provided with permanent magnet magnetized in the axial direction.
According to the present invention, can provide like lower magnet baried type electric rotating machine, it can advance miniaturization, also can advance high efficiency through the leakage flux that reduces from rotor side surface simultaneously.
Description of drawings
Fig. 1 is the axial cutaway view of the magnet baried type electric rotating machine that relates to of the 1st execution mode of the present invention.
Fig. 2 is the radial cross-section of the magnet baried type electric rotating machine that relates to of this execution mode.
Fig. 3 is the axial cutaway view of said rotor.
Fig. 4 is the modular construction sketch map of said rotor.
Fig. 5 is the non-loaded torque test sketch map as a result of this execution mode.
Fig. 6 is other the configuration mode sketch map of imbedding magnet.
Symbol description
The 10-framework; 11-load-side carriage; The 11a-rotor is near portion; 12-load opposition side carriage; The 13-stator core; The 14-stator coil; The 15-moulded resin; The 16-wire connecting portion; 17-encoder portion; 18-load-side bearing; 19-load opposition side bearing; The 20-rotor; The 21-axle; The 22-permanent magnet; The 23-rotor core; 26-load-side side plate; 27-load opposition side side plate; 28-load-side permanent magnet; 29-load opposition side permanent magnet; The F-magnetic flux; The F1-leakage flux; Fc-is by the magnetic flux of the permanent magnet generation of side.
Embodiment
Below, with reference to accompanying drawing execution mode of the present invention is described.And, through coming suitably to omit repeat specification for the identical symbol of same structure mark.
The 1st execution mode
The structure of the magnet baried type electric rotating machine that at first, the 1st execution mode of the present invention is related to reference to Fig. 1 describes.Fig. 1 is the axial cutaway view of the magnet baried type electric rotating machine that supplies to relate in the 1st execution mode of the present invention of servo motor.
As shown in Figure 1, the magnet baried type electric rotating machine that this execution mode relates to has: the stator that is provided with stator core 13 and stator coil 14; Be provided with the roughly cylindrical circular rotor 20 that permanent magnet 22 and rotation are supported freely; And the encoder portion 17 of the position of rotation of the said rotor of detection.
In order to cover the purpose from the leakage flux of rotor side surface, rotor 20 possesses load-side permanent magnet 28 and load opposition side permanent magnet 29 on rotor side surface.Load-side permanent magnet 28 and load opposition side permanent magnet 29 remain on respectively on the load-side side plate 26 that is made up of nonmagnetic substance and the load opposition side side plate 27.
Through load-side bearing 18 and load opposition side bearing 19 rotor 20 rotations are remained on load-side carriage 11 and the load opposition side carriage 12 freely.
Through not shown bolt load opposition side carriage 12 is attached on the load-side carriage 11 with framework 10.
Fig. 2 is the radial cross-section of the magnet baried type electric rotating machine that relates to of this execution mode.
As shown in Figure 2, stator 12 is stator coil 14 is installed in each stator core 13 of 12 is constituted being divided into.Come stator coil 14 and stator core 13, load-side carriage 11 are insulated through moulded resin 15.
The magnetic pole piece 23a of permanent magnet 22, rotor core is supported in rotor core 23 for centrifugal force, agree with being fixed on the axle simultaneously through the concavo-convex portion that agrees with that agrees with, and therefore also can stand powerful torque.
Fig. 3 is the axial cutaway view of said rotor.
In the drawings; On the side of the rotor core that permanent magnet 22 is installed 23; Installation load side side plate 26 and load opposition side side plate 27, load-side permanent magnet 28 is installed on the load-side side plate 26, and load opposition side permanent magnet 29 is installed on the load opposition side side plate 27.
Like this execution mode, in the magnet baried type electric rotating machine of flux concentrating,, increase leakage flux F1 from rotor side surface for useful flux F towards stator core.
For example the rotor of load-side carriage 11 shown in Figure 1 near the 11a of portion in, this leakage flux is brought out to result from and is followed the rotor rotation and harmful eddy current loss of the leakage flux of alternation.Though reduced the generation of eddy current loss through the space distance that strengthens rotor side surface and carriage wall, in method in the past, can't advance the miniaturization of electric rotating machine in the past.
In order to make leakage flux F1 decay, on rotor side surface, load-side permanent magnet 28 and load opposition side permanent magnet 29 are set with the mode relative with magnetic flux from rotor side surface.The magnetic flux Fc that produces through the permanent magnet by the side can make the leakage flux F1 decay from rotor side surface.Decide the thickness of load-side permanent magnet 28 and load opposition side permanent magnet 29 according to magnetic field analysis, so that leakage flux F1 is decayed for use amount effectively.
Fig. 4 is the modular construction sketch map of said rotor.
In the drawings; After rotor core that permanent magnet 22 will be installed 23 and the load-side side plate 26 that load-side permanent magnet 28 is installed are installed on the axle 21; The load opposition side side plate 27 that load opposition side permanent magnet 29 is installed is entrenched on the axle, accomplishes rotor.
On load opposition side side plate 27, there is the recess that is used for installation load opposition side permanent magnet 29, alternatively is provided with the N utmost point and the S utmost point with the mode relative with the magnetic pole piece 23a of rotor core.Load-side side plate 26 is also identical.
Load-side side plate 26 is non magnetic stainless steels with load opposition side side plate 27, can not make the magnetic flux short circuit of the N utmost point and the S utmost point because of side plate.
Fig. 5 is from the electric rotating machine of this execution mode of external drive and through relatively measuring the non-loaded torque test of the required torque of rotary speed sketch map as a result.
In the drawings, though the non-loaded torque of this execution mode C is fully little, in the A of the permanent magnet of installation load side and load opposition side not, non-loaded torque is increased to about 2 times.Why like this, to be because bring out harmful eddy current loss at the rotor of load-side carriage shown in Figure 1 near on the 11a of portion etc. from the leakage flux F1 of rotor side surface.This loss increases the efficient that reduces electric rotating machine.As the method that strengthens the space based in the past gimmick, even removing under the situation of said rotor near the B of the 11a of portion, also compare non-loaded torque increases with this execution mode.
Promptly; The permanent magnet 28,29 of the rotor side surface of this execution mode also is set through the permanent magnet 22 that is different from magnetic poles; Obtain following result; Utilize flux concentrating to advance the miniaturization of magnet baried type electric rotating machine, also can advance high efficiency simultaneously through the axial leakage flux that reduces rotor.
As described above; The magnet baried type electric rotating machine that this execution mode relates to can provide like lower magnet baried type electric rotating machine; The permanent magnet 28,29 of rotor side surface also is set through the permanent magnet 22 that is different from magnetic poles; Thereby can utilize flux concentrating to advance miniaturization, also can advance high efficiency simultaneously through the leakage flux that reduces from rotor side surface.
More than, execution mode of the present invention is illustrated.But, if so-called those skilled in the art then in the scope that does not break away from purport of the present invention, can suitably change according to above-mentioned execution mode, and, can also be to above-mentioned execution mode with based on the in addition appropriate combination utilization of the gimmick of change example.That is, even the much less this technology that imposes change etc. also belongs in the technical scope of the present invention.
For example; In the above-described embodiment; Though roughly be the permanent magnet of V word shape ground configuration magnetic poles; But the configuration mode sketch map of imbedding magnet of other shown in the image pattern 6 is such, and also mounting permanent magnet 32 (A) radially also can be further mounting permanent magnet 42a (B) of circle-shaped ground in interior all sides of radial permanent magnet 42b.That is, the shield of leakage flux of the present invention is following, has bigger magnetic pole piece 23a, 33a, the 43a that are surrounded by permanent magnet, and the arrangement of imbedding magnet that becomes the bigger side of flux leakage for this magnetic pole piece has same effect.
Magnet baried type electric rotating machine of the present invention is following, owing to can realize the small-sized efficient rateization, therefore can be not limited to motor and is applied to comprise in the purposes of electric rotating machine widely of generator.
Claims (4)
1. magnet baried type electric rotating machine, it possesses: stator; And rotate the rotor of the general cylindrical shape that supports freely, it is characterized by,
On rotor side surface, be different from the permanent magnet of magnetic poles and on each magnetic pole, also be provided with permanent magnet magnetized in the axial direction.
2. magnet baried type electric rotating machine according to claim 1 is characterized by,
The permanent magnet that is arranged on the said side is following, and the shape of the scope that permanent magnet was surrounded that is configured 1 magnetic pole of rotor core with covering is set up.
3. magnet baried type electric rotating machine according to claim 1 and 2 is characterized by,
The permanent magnet that is arranged on the said side is following, is provided with for the magnetic pole of the N utmost point, the S utmost point mode for the S utmost point with the magnetic pole of the N utmost point towards axial inboard.
4. according to any described magnet baried type electric rotating machine in the claim 1 to 3, it is characterized by,
The permanent magnet that is arranged on the said side remains on the side plate that is made up of nonmagnetic substance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-097517 | 2011-04-25 | ||
| JP2011097517A JP2012231578A (en) | 2011-04-25 | 2011-04-25 | Embedded magnet rotary electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102761220A true CN102761220A (en) | 2012-10-31 |
Family
ID=47055565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100273584A Pending CN102761220A (en) | 2011-04-25 | 2012-02-08 | Magnet-embedded rotary motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012231578A (en) |
| CN (1) | CN102761220A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104179A (en) * | 2019-06-17 | 2020-12-18 | 何若冲 | Permanent magnet motor |
| US11632024B2 (en) * | 2017-10-03 | 2023-04-18 | Romax Technology Limited | Permanent magnet rotor assembly |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6018940B2 (en) * | 2013-01-31 | 2016-11-02 | マブチモーター株式会社 | Rotor and motor |
| JP5892106B2 (en) * | 2013-04-15 | 2016-03-23 | 株式会社安川電機 | Rotating electric machine and method of manufacturing rotor |
| JP7318556B2 (en) * | 2020-02-17 | 2023-08-01 | 株式会社デンソー | rotor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6229239B1 (en) * | 1997-04-23 | 2001-05-08 | Centre National De La Recherche Scientifique (C.N.R.S) | Electrical machine with double excitation |
| US6462449B1 (en) * | 1998-12-07 | 2002-10-08 | Centre National De La Recherche Scientifique (C.N.R.S.) | Rotating electric machine with improved double excitation |
| CN1713484A (en) * | 2004-06-25 | 2005-12-28 | 爱信精机株式会社 | Motor |
| JP2008029130A (en) * | 2006-07-21 | 2008-02-07 | Daikin Ind Ltd | Rotating electric machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2530940Y2 (en) * | 1989-12-05 | 1997-04-02 | 株式会社安川電機 | Permanent magnet type rotor of rotating electric machine |
-
2011
- 2011-04-25 JP JP2011097517A patent/JP2012231578A/en active Pending
-
2012
- 2012-02-08 CN CN2012100273584A patent/CN102761220A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6229239B1 (en) * | 1997-04-23 | 2001-05-08 | Centre National De La Recherche Scientifique (C.N.R.S) | Electrical machine with double excitation |
| US6462449B1 (en) * | 1998-12-07 | 2002-10-08 | Centre National De La Recherche Scientifique (C.N.R.S.) | Rotating electric machine with improved double excitation |
| CN1713484A (en) * | 2004-06-25 | 2005-12-28 | 爱信精机株式会社 | Motor |
| JP2008029130A (en) * | 2006-07-21 | 2008-02-07 | Daikin Ind Ltd | Rotating electric machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11632024B2 (en) * | 2017-10-03 | 2023-04-18 | Romax Technology Limited | Permanent magnet rotor assembly |
| CN112104179A (en) * | 2019-06-17 | 2020-12-18 | 何若冲 | Permanent magnet motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012231578A (en) | 2012-11-22 |
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Application publication date: 20121031 |