CN204304642U - Electric rotating machine - Google Patents
Electric rotating machine Download PDFInfo
- Publication number
- CN204304642U CN204304642U CN201420486247.4U CN201420486247U CN204304642U CN 204304642 U CN204304642 U CN 204304642U CN 201420486247 U CN201420486247 U CN 201420486247U CN 204304642 U CN204304642 U CN 204304642U
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- Prior art keywords
- permanent magnet
- rotor core
- rotating machine
- electric rotating
- magnetic pole
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000004907 flux Effects 0.000 abstract description 26
- 101100407060 Caenorhabditis elegans par-6 gene Proteins 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model provides electric rotating machine, and it can realize the high output of electric rotating machine by increasing useful flux.A kind of electric rotating machine (1), it possesses stator (2) and rotor (3), and has: cylindric rotor core (5); And multiple permanent magnet (11), they are embedded in rotor core (5).Multiple par (6) is formed at the outer peripheral face of the radial direction of rotor core (5).Rotor core (5) has the multiple magnetic pole pieces (8) equally spaced configured in a circumferential direction, and each par (6) are positioned between circumferentially adjacent magnetic pole piece (8).
Description
Technical field
Disclosed in the utility model, embodiment relates to electric rotating machine.
Background technology
Such as in patent document 1, the permanent magnet describing rectangular shape is radially equally spaced configured at the motor of rotor core.
Patent document 1: Japanese Unexamined Patent Publication 2010-4722 publication
In the above prior art, the outer peripheral face of rotor core is cylinder planar.Therefore, via the gap between the end face of the radial outside of permanent magnet and the outer peripheral face of rotor core magnetic pole between leakage field increase, exist and cause exporting the problem reduced because useful flux reduces.
Utility model content
The utility model completes in view of such problem just, and its object is to provides the electric rotating machine that can realize high output by increasing useful flux.
For solving above-mentioned problem, according to a viewpoint of the present utility model, apply a kind of electric rotating machine, it possesses stators and rotators, and described electric rotating machine has: rotor core; Multiple permanent magnet, they are embedded in described rotor core; And par, it is formed at the outer peripheral face of the radial direction of described rotor core.
In addition, in order to solve above-mentioned problem, according to another viewpoint of the present utility model, apply a kind of electric rotating machine, it possesses stators and rotators, and described electric rotating machine has: cylindric rotor core; Multiple permanent magnet, they are embedded in described rotor core; And make the roughly uniform component in a circumferential direction of the thickness between the end face in the outside of the described radial direction of the outer peripheral face of the radial direction of described rotor core and described permanent magnet.
Utility model effect
According to the utility model, the high output of electric rotating machine can be realized by increasing useful flux.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view vertical with axis of the electric rotating machine of embodiment.
Fig. 2 a is the key diagram of the magnetic flux distribution around the permanent magnet of the rotor core representing comparative example 1.
Fig. 2 b is the key diagram of the magnetic flux distribution around the permanent magnet of the rotor core representing embodiment.
Fig. 3 is the curve map of the magnetic flux distribution on the surface of the magnetic flux distribution on the surface of the rotor core representing comparative example 1 and the rotor core of embodiment.
Fig. 4 is the key diagram of the rotor core representing comparative example 2.
Fig. 5 represents the cross-sectional view along the rotor core when configuration permanent magnet of the direction vertical with radial direction.
Fig. 6 represents the key diagram along the magnetic flux distribution around the permanent magnet of the rotor core when configuration permanent magnet of the direction vertical with radial direction.
Fig. 7 is the cross-sectional view of rotor core when defining caulking part.
Fig. 8 is the cross-sectional view of a part for the rotor core represented when the radial direction arranged outside space of permanent magnet.
Label declaration
1: electric rotating machine;
2: stator;
3: rotor;
5: rotor core;
6: par (making thickness roughly uniform component in a circumferential direction);
7: cylinder face;
8: magnetic pole piece;
11: permanent magnet;
14: the circuit portion of leakage field;
17: caulking part;
18: space (making thickness roughly uniform component in a circumferential direction).
Detailed description of the invention
Below, with reference to accompanying drawing, an embodiment is described.
The structure > of < electric rotating machine
First, use Fig. 1, the structure of the electric rotating machine of present embodiment is described.As shown in Figure 1, electric rotating machine 1 is the motor of inner-rotor type, and it possesses: stator 2, and it is the armature with not shown armature winding; With rotor 3, it is the excitation division with permanent magnet 11, and rotor 3 is configured in the inner side of stator 2.More particularly, electric rotating machine 1 is IPM (Interior Permanent Magnet, the built-in type permanent-magnet) motor possessing above-mentioned permanent magnet 11 in the inside of rotor 3.Rotor 3 is fixed on the axle 4 at its center through.
The structure > of < rotor
Rotor 3 is arranged opposite with the inner peripheral surface of mode spaced apart and stator 2.This rotor 3 possesses rotor core 5 and is embedded in the multiple of rotor core 5 and (is 10 in this embodiment.But also can be beyond 10) above-mentioned permanent magnet 11.Rotor core 5 has stackedly vertically fixes multiple electromagnetic steel plates and the laminate construction formed.
Rotor core 5 has multiple (being 10 the in this embodiment) magnetic pole piece 8 equally spaced configured in a circumferential direction and the cylindrical portion 9 linked with axle 4.Permanent magnet 11 is configured with between magnetic pole piece 8 adjacent in a circumferential direction.Rotor core 5 is roughly cylindric, but is formed with par 6 at its outer peripheral face (radial outer peripheral face).Par 6 is such as by carrying out D-CUT to be formed to outer peripheral face.Par 6 is formed as identical with permanent magnet 11 quantity (being 10 in this embodiment), and lays respectively at the angle identical with permanent magnet 11.That is, par 6 is between circumferentially adjacent magnetic pole piece 8.At the outer peripheral face of rotor core 5, be arranged alternately with the cylinder face 7 beyond par 6 and par 6 in the circumferential.
Permanent magnet 11 is axially formed as rectangular shape rotor core 5, has rectangular shape longer in the radial direction with axially vertical cross section.Each permanent magnet 11 is inserted into and is fixed in the through hole 10 of the axis being arranged at rotor core 5.Its result is, multiple permanent magnet 11 radially configures with the posture that radial direction outboard end is opposed with the par 6 of rotor core 5.
Each permanent magnet 11 is being magnetized with on the radial direction and axially vertical direction (roughly circumferencial direction) of rotor core 5.The identical magnetic pole that multiple permanent magnet 11 is configured to permanent magnet 11 adjacent is in a circumferential direction opposed each other.That is, multiple permanent magnet 11 is configured to make N pole toward each other at certain magnetic pole piece 8 place, and magnetic pole piece 8 place adjacent at it makes S pole toward each other.The magnetic pole piece 8 that the N of permanent magnet 11 is extremely relative becomes N pole, and the magnetic pole piece 8 that the S of permanent magnet 11 is extremely relative becomes S pole.Hand over from the magnetic pole piece 8 becoming N pole towards the magnetic flux of magnetic pole piece 8 and coil-winding (armature winding) the interlinkage (Lock of stator 2 becoming S pole), thus produce the rotating torques of rotor 3.
The space 12 of through rotor core 5 is vertically provided with inside radial direction between the adjacent permanent magnet 11 of rotor core 5.In this embodiment, space 12 be roughly pentagon shaped with axially vertical shape of cross section, space 12 has: with flux channeled 12b outside the magnet opposed faces 12a producing the opposed radial direction in the side in face as magnetic flux of permanent magnet 11 and the radial direction be connected with magnet opposed faces 12a.The magnet opposed faces 12a in space 12 has narrow gap between the magnetic flux generation face of permanent magnet 11, and almost parallel.Space 12 utilizes flux channeled 12b to become the flux channeled outer circumferential side to rotor 3 of the permanent magnet 11 of the magnetic pole piece 8 of N pole, on the other hand, utilizes magnet opposed faces 12a, reduces the leakage field of the internal side diameter to rotor 3 between 2 adjacent permanent magnets 11.
Magnetic flux distribution > around permanent magnet in < rotor core
Magnetic flux distribution around permanent magnet 11 in the rotor core 5 of comparative example 1 and present embodiment has been shown in Fig. 2 a and Fig. 2 b.The rotor core 5 of comparative example 1 does not form par at outer peripheral face, but becomes barrel surface 13.
As shown in Figure 2 a, in comparative example 1, the outer peripheral face of rotor core 5 becomes barrel surface 13.Therefore, the end face 11a outside the radial direction of permanent magnet 11 and the gap 14 between barrel surface 13 become large.Especially, barrel surface 13 is the shapes of swelling laterally, therefore, gap 14 towards permanent magnet 11 central portion (central portion of circumferencial direction) and increase.Its result is, the flow path area of the leakage field M between magnetic pole piece 8 becomes large, and leakage field M becomes many.
On the other hand, in the present embodiment, as shown in Figure 2 b, par 6 is formed with at the outer peripheral face of rotor core 5.Utilize this par 6, the gap 14 between the end face 11a that can reduce outer peripheral face and permanent magnet 11, and the thickness in gap 14 can be made even.Its result is, compared with comparative example 1, can reduce the flow path area of the leakage field M between magnetic pole piece 8, the easy magnetic saturation of part in gap 14.Therefore, it is possible to reduce leakage field M.In addition, par 6 be equivalent to the outer peripheral face of the radial direction making rotor core and the radial outside of permanent magnet end face between an example of thickness roughly uniform component in a circumferential direction.
The effect > of < embodiment
As described above, in the electric rotating machine 1 of present embodiment, par 6 is formed with at the outer peripheral face of the radial direction of rotor core 5.In the forming portion office of par 6, compared with not being provided with the situation of this par 6, the outer peripheral face of rotor core 5 can be made to be positioned at radially inner side.That is, by forming par 6 accordingly with the part (magnetic pole piece 8 is each other) becoming the stream of leakage field M in rotor core 5, the flow path area of this leakage field M can be made to reduce, thus easily magnetic saturation.Its result is, compared with being cylindric above-mentioned comparative example 1, can reduce the leakage field M in rotor core 5 with rotor core 5.Therefore, it is possible to increase the useful flux of permanent magnet 11, make electric rotating machine 1 high output.
And, in the case of comparative example 1, as shown in Figure 3, the magnetic flux distribution on the surface of rotor core 5 becomes the distribution of the roughly trapezoidal shape (or rectangular shape) centered by magnetic pole piece 8 (center=angle 18 °), produce the fluctuation of cogging torque, become the main cause of noise, vibration etc.In the present embodiment, as shown in Figure 3, utilize said structure, the magnetic flux distribution on the surface of rotor core 5 becomes the distribution close to sine wave shape centered by magnetic pole piece 8 (center=angle 18 °).Thereby, it is possible to reduce the fluctuation of cogging torque, noise, vibration etc. can be reduced.
In addition, in order to prevent the leakage field between magnetic pole piece 8, such as shown in Figure 4, the structure by being formed as space 15 outside the radial direction of the permanent magnet 11 in rotor core 5 is considered.When this comparative example 2, produce stress at the root 16 of magnetic pole piece 8 to concentrate, therefore, need in order to ensure the intensity of rotor core 5 to make the root 16 of magnetic pole piece 8 comparatively thick (increasing the interval of permanent magnet 11), its result is, there is the problem that the leakage field to the internal side diameter of rotor core 5 increases.In the present embodiment, there is iron core at the outer circumferential side of permanent magnet 11, therefore, it is possible to guarantee the intensity of rotor core 5.Its result is, compared with comparative example 2, can reduce the interval of permanent magnet 11, therefore, it is possible to reduce the leakage field to internal side diameter.Therefore, it is possible to increase useful flux, make electric rotating machine 1 high output.
And, in the present embodiment, especially, multiple permanent magnet 11 is radially configured at rotor core 5 in the mode that the identical magnetic pole of permanent magnet 11 adjacent is in a circumferential direction opposed each other, par 6 is formed as identical with permanent magnet 11 quantity, and lays respectively at the angle identical with permanent magnet 11.By so radial configuration structure, the amount of putting into of permanent magnet 11 can be increased, make flux concentrating in magnetic pole piece 8.
In addition, the following shows an example to the simulation result of the motor performance that the motor of present embodiment, comparative example 1 and comparative example 2 carries out such as present inventor.
As implied above, about motor torque constant, when set the situation of comparative example 1 as 100% time, being 97.8% in comparative example 2, is 103.3% in the present embodiment, visible, utilizes the structure of present embodiment that motor torque constant can be made maximum.Further, when representing cogging torque with nominal torque ratio, be 0.73% in comparative example 1, be 0.88% in comparative example 2, is 0.52% in the present embodiment, visible, utilizes the structure of present embodiment significantly can reduce cogging torque.
< variation >
In addition, disclosed embodiment is not limited to above-mentioned situation, can carry out various distortion in the scope not departing from its purport and technological thought.Below such variation is described.
(1) on rotor core, on the direction vertical with radial direction, configure the situation of permanent magnet
In the above-described embodiment, be illustrated for the situation being radially configured with multiple permanent magnet 11 on rotor core 5, but such as shown in Figure 5, each permanent magnet 11 also can be configured to extend on the direction vertical with radial direction.
As shown in Figure 5, rotor core 5 possesses and multiplely (is 4 in this embodiment.But also can be beyond 4) permanent magnet 11.Multiple permanent magnet 11 is vertical with radial direction with being arranged into of the circumference along rotor core 5.Each permanent magnet 11 is magnetized on the radial direction of rotor core 5.Multiple permanent magnet 11 is to become N pole at certain magnetic pole piece 8 place and to become the mode alternately configuration of S pole at adjacent magnetic pole piece 8 place.That is, rotor core 5 has the magnetic pole piece 8 of identical with permanent magnet 11 quantity (being 4 in this embodiment).Further, be formed with the par 6 of identical with permanent magnet 11 quantity (being 4 in this embodiment) at the outer peripheral face of rotor core 5, par 6 and cylinder face 7 be alternately configuration in the circumferential.Each par 6 is between permanent magnet 11 adjacent in the circumferential.
In this variation, permanent magnet 11 is configured at rotor core 5 in the mode becoming the direction vertical with radial direction.In the configuration structure of such permanent magnet 11, as shown in Figure 6, between magnetic pole piece 8, leakage field M is produced via the gap 14 between the circumferentially adjacent permanent magnet 11 of rotor core 5.Therefore, as this variation, by each par 6 is formed as laying respectively between adjacent permanent magnet 11, the flow path area of leakage field M and easily magnetic saturation can be reduced, thus effectively can reduce the leakage field M between magnetic pole piece 8.Further, the magnetic flux distribution on the surface of rotor core 5 can be made to be similar to sine wave shape, thus the reduction effect of cogging torque can also be obtained.
(2) situation of the electromagnetic steel plate of fixed rotor iron core is riveted
As previously mentioned, rotor core 5 has and stackedly vertically fixes multiple electromagnetic steel plates and the laminate construction formed.In this variation, the electromagnetic steel plate stacked to this fixing in employ riveted joint.An example of the rotor core 5 of shown in Figure 7 variation.
As shown in Figure 7, the rotor core 5 of rotor 3 possesses caulking part 17 at each magnetic pole piece 8 place.Caulking part 17 is radially formed.Utilize this caulking part 17, multiple the stacked vertically electromagnetic steel plates forming rotor core 5 are fixed.Other structures of this variation are identical with above-mentioned embodiment, and label identical with the label marked in Fig. 1 in Fig. 7 represents identical key element.
Although the diagram of eliminating, the flow direction of the permanent magnet 11 of each magnetic pole piece 8 roughly becomes direction (radial direction) radially.Therefore, as shown in this variation, by radially forming caulking part 17, the flowing hindering magnetic flux can be avoided, thus the reduction of useful flux is suppressed in Min..
(3) in the situation in the radial direction arranged outside space of permanent magnet
In the above-described embodiment, par 6 is formed as by the outer peripheral face of the position of the permanent magnet 11 by rotor core 5, make the thickness between the end face 11a outside the outer peripheral face of rotor core 5 and the radial direction of permanent magnet 11 even, but make the uniform means of thickness be not limited to this.Such as shown in Figure 8, by the radial direction arranged outside of the permanent magnet 11 in rotor core 5 not in the space of outer peripheral face opening, the thickness between the end face 11a of the outer peripheral face of rotor core 5 and permanent magnet 11 also can be made even.
As shown in Figure 8, rotor core 5 does not have par 6 at outer peripheral face, but becomes barrel surface 13.In this variation, the part place outside the radial direction of permanent magnet 11 is formed with the space 18 of roughly crescent shape.The crescent shape that the radial outside portion of the Consistent through hole 10 inserted by making permanent magnet 11 is formed as swelling to outer peripheral side forms this space 18.
Thereby, it is possible to reduce the gap 14 between the outer peripheral face of rotor core 5 and the end face 11a of permanent magnet 11, and the thickness in gap 14 can be made even.Its result is, identically with above-mentioned embodiment, can reduce the leakage field M between magnetic pole piece 8.Therefore, it is possible to increase useful flux, make electric rotating machine high output.In addition, space 18 be equivalent to the outer peripheral face of the radial direction making rotor core and the radial outside of permanent magnet end face between an example of thickness roughly uniform component in a circumferential direction.
(4) other
Above, be illustrated for the situation that electric rotating machine 1 is motor, but present embodiment also can be applied to the situation that electric rotating machine 1 is generator.
Further, to make armature for stator 2 in electric rotating machine 1 and to make excitation division be illustrated for the situation of rotor 3, but present embodiment also can be applied to and makes armature be rotor and make excitation division be the situation of the electric rotating machine of stator.
In addition, except having illustrated above, also can use appropriately combined for the technology of above-mentioned embodiment and each variation.
In addition, illustrate though do not illustrate one by one, above-mentioned embodiment and each variation can apply various change to implement in the scope not departing from its purport.
Claims (5)
1. an electric rotating machine, it possesses stators and rotators, and the feature of described electric rotating machine is,
Described electric rotating machine has:
Rotor core;
Multiple permanent magnet, they are embedded in described rotor core; And
Par, it is formed at the outer peripheral face of the radial direction of described rotor core.
2. electric rotating machine according to claim 1, is characterized in that,
Described rotor core has the multiple magnetic pole pieces equally spaced configured in a circumferential direction,
Described flat part is between described circumferentially adjacent described magnetic pole piece.
3. electric rotating machine according to claim 2, is characterized in that,
Described multiple permanent magnet is radially configured at described rotor core in the mode opposed each other at the identical magnetic pole of described circumferentially adjacent described permanent magnet,
Described par is formed as identical with described permanent magnet quantity, and lays respectively at the angle identical with described permanent magnet.
4. electric rotating machine according to claim 2, is characterized in that,
Described permanent magnet is configured at described rotor core in the mode becoming the direction vertical with described radial direction,
Described par is formed as identical with described permanent magnet quantity, and between described permanent magnet circumferentially adjacent described in laying respectively at.
5. the electric rotating machine according to claim 3 or 4, is characterized in that,
Described rotor core is consisted of stacked multiple electromagnetic steel plate, and has along the described caulking part be formed radially at described magnetic pole piece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPJP2013-176725 | 2013-08-28 | ||
| JP2013176725A JP5954279B2 (en) | 2013-08-28 | 2013-08-28 | Rotating electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204304642U true CN204304642U (en) | 2015-04-29 |
Family
ID=52672086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420486247.4U Expired - Lifetime CN204304642U (en) | 2013-08-28 | 2014-08-26 | Electric rotating machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5954279B2 (en) |
| CN (1) | CN204304642U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964307A (en) * | 2017-05-18 | 2018-12-07 | 大银微系统股份有限公司 | Built-in permanent magnet motor |
| CN114303302A (en) * | 2019-08-26 | 2022-04-08 | 日本电产株式会社 | Permanent magnet embedded motor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI625029B (en) * | 2017-04-26 | 2018-05-21 | 大銀微系統股份有限公司 | Interior-permanent-magnet motor |
| DE102017111174A1 (en) | 2017-05-22 | 2018-11-22 | Hiwin Mikrosystem Corp. | Interior permanent magnet motor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001211582A (en) * | 2000-01-26 | 2001-08-03 | Fujitsu General Ltd | Permanent magnet motor |
| ITBO20050437A1 (en) * | 2005-06-30 | 2007-01-01 | Spal Automotive Srl | ROTOR FOR ELECTRIC MACHINE |
| JP4815204B2 (en) * | 2005-12-01 | 2011-11-16 | アイチエレック株式会社 | Permanent magnet rotating machine and compressor |
-
2013
- 2013-08-28 JP JP2013176725A patent/JP5954279B2/en active Active
-
2014
- 2014-08-26 CN CN201420486247.4U patent/CN204304642U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964307A (en) * | 2017-05-18 | 2018-12-07 | 大银微系统股份有限公司 | Built-in permanent magnet motor |
| CN114303302A (en) * | 2019-08-26 | 2022-04-08 | 日本电产株式会社 | Permanent magnet embedded motor |
| CN114303302B (en) * | 2019-08-26 | 2023-12-05 | 日本电产株式会社 | Permanent magnet embedded motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015047009A (en) | 2015-03-12 |
| JP5954279B2 (en) | 2016-07-20 |
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| GR01 | Patent grant |