CN112821612B - Rotor lamination, rotor assembly and motor - Google Patents
Rotor lamination, rotor assembly and motor Download PDFInfo
- Publication number
- CN112821612B CN112821612B CN201911118752.7A CN201911118752A CN112821612B CN 112821612 B CN112821612 B CN 112821612B CN 201911118752 A CN201911118752 A CN 201911118752A CN 112821612 B CN112821612 B CN 112821612B
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- Prior art keywords
- rotor
- permanent magnet
- sector
- positioning
- rotor lamination
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- 238000003475 lamination Methods 0.000 title claims abstract description 63
- 238000009434 installation Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000012217 deletion Methods 0.000 description 2
- 230000037430 deletion Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The application provides a rotor lamination, a rotor assembly and a motor. The rotor lamination includes: a center section having a shaft hole therein; and a plurality of sector sections extending radially from the central section, respectively; and forming a permanent magnet installation space between adjacent sector sections; each sector section is provided with a stop part at the far end part deviating from the central section, and the stop parts are used for limiting the permanent magnets installed in the permanent magnet installation space to move along the radial direction; wherein, each sector is provided with a deformable positioning part at the side part, and each sector is correspondingly provided with a yielding hole at the inner side of the positioning part; when the permanent magnet is installed in the permanent magnet installation space, the positioning part is pressed by the permanent magnet until the position-giving hole in the sector section is deformed, and when the positioning pin is installed in the position-giving hole, the positioning part is pressed by the positioning pin until the position-giving hole is deformed, and the permanent magnet is pressed. According to the technical scheme of the application, the interference degree of the permanent magnet and the rotor lamination at different assembly stages is adjusted by arranging the positioning parts and the yielding holes capable of providing deformation spaces for the positioning parts on the side parts of the sector sections of the rotor lamination.
Description
Technical Field
The present application relates to the field of electric motors, and more particularly to improved rotor laminations and rotor assemblies for electric motors.
Background
An electric motor is a widely used type of power source component in the prior art and generally includes a rotor and a stator that cooperate to generate a magnetic field. In the case of permanent-magnet machines, the rotor or stator is usually provided with at least one permanent magnet in order to generate an electromagnetic field. In one type of motor example, for a servo motor excited by a permanent magnet, the permanent magnet is typically mounted within a permanent magnet mounting space. In order to realize the tight assembly of the permanent magnet and the permanent magnet, an interference fit part exists between the permanent magnet installation space and the permanent magnet. Such interference fits place high demands on manufacturing tolerances and installation of the components. Wherein, both due to excessive manufacturing tolerance and due to deviation in the assembly process, excessive wear may occur in the assembly process, thereby resulting in insufficient reliability or performance of the motor. Although such problems can be alleviated by high precision manufacturing and assembly processes, this will result in a significant increase in the cost of the process. In addition, the assembly of the permanent magnet in the permanent magnet installation space can also be realized by adopting a glue filling technology. The gap between the permanent magnet and the permanent magnet installation space is filled by glue application, so that the abrasion problem of the permanent magnet and the permanent magnet due to interference fit can be effectively avoided. But it is relatively more costly and it has a longer process time to effect curing of the glue and a more complex control process to effect accurate sizing.
Disclosure of Invention
In view of the above, the present application provides a rotor lamination, a rotor assembly, and a motor that effectively solve or mitigate one or more of the above-identified problems, as well as other problems, that exist in the prior art.
To solve one of the above technical problems, according to one aspect of the present application, there is provided a rotor lamination including: a center section having a shaft hole therein; and a plurality of scalloped sections each extending radially from the center section; and forming a permanent magnet installation space between adjacent sector sections; each sector section is provided with a stop part at a distal end part deviating from the central section, and the stop parts are used for limiting the permanent magnets installed in the permanent magnet installation space to move along the radial direction; wherein, each sector section is provided with a deformable positioning part at the side part, and each sector section is correspondingly provided with a yielding hole at the inner side of the positioning part; when the permanent magnet is installed in the permanent magnet installation space, the positioning part is pressed by the permanent magnet until the position-giving hole in the sector section is deformed, and when the positioning pin is installed in the position-giving hole, the positioning part is pressed by the positioning pin until the position-giving hole is deformed toward the permanent magnet installation space and compresses the permanent magnet.
According to yet another aspect of the present application, there is also provided a rotor assembly including: a rotor core formed by lamination of a plurality of rotor laminations; each rotor lamination is provided with a shaft hole, a permanent magnet installation space and a yielding hole; a permanent magnet installed in the permanent magnet installation space; a rotating shaft installed in the shaft hole; and a locating pin mounted in the yielding hole; wherein at least a portion of a plurality of said rotor laminations are configured as described previously.
According to still another aspect of the present application, there is also provided an electric machine including: a rotor lamination as described above, or a rotor assembly as described above.
According to the technical scheme of the application, the interference degree of the permanent magnet and the rotor lamination at different assembly stages is adjusted by arranging the positioning parts and the yielding holes which can provide deformation spaces for the positioning parts on the side parts of the sector sections of the rotor lamination. For example, the permanent magnets are not excessively worn due to interference fit or assembly errors when being installed in the permanent magnet installation space of the rotor lamination by the deformation of the positioning part towards the yielding hole; for another example, the permanent magnets that have been assembled in place are firmly positioned in the permanent magnet installation space of the rotor lamination by deformation of the positioning portions into the permanent magnet installation space.
Drawings
The present application will be more fully understood from the following detailed description of the specific embodiments, taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements in the drawings. Wherein:
FIG. 1 is a schematic view of an embodiment of a rotor assembly of the present application in which permanent magnets and locating pins have not been incorporated;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of an embodiment of the rotor assembly of the present application in which permanent magnets have been incorporated, but no locating pins have been incorporated;
FIG. 4 is an enlarged partial schematic view at B in FIG. 3;
FIG. 5 is a schematic view of an embodiment of a rotor assembly of the present application in which permanent magnets and locating pins have been incorporated;
FIG. 6 is an enlarged partial schematic view at C in FIG. 5;
fig. 7 is one embodiment of a locating pin of the rotor assembly of the present application.
Detailed Description
First of all, it should be noted that the composition, working principle, characteristics and advantages of the rotor lamination, the rotor assembly and the motor according to the application will be described below by way of example, but it should be understood that all the descriptions are given for illustration only and should not be construed as limiting the application in any way. In this document, the technical term "connected" and its derivatives encompass one component directly connected to another component and/or indirectly connected to another component.
Furthermore, to any single technical feature described or implicit in the embodiments mentioned herein, or any single technical feature shown or implicit in the drawings, the application still allows any combination or deletion of any combination or deletion between these technical features (or their equivalents) to be continued without any technical obstacle, thereby obtaining still other embodiments of the application that may not be directly mentioned herein.
In fig. 1 to 6, a schematic representation of three phases of the assembly of a rotor lamination with permanent magnets of an embodiment of a rotor assembly according to the application is schematically shown, wherein the rotor lamination is in an initial phase, a permanent magnet loading phase and a dowel loading phase, respectively. And the general structure and construction of the applied locating pin is shown in fig. 7. The technical scheme of the application will be described in detail below with reference to the above drawings.
Referring to fig. 1 and 2, there is shown a view of a rotor assembly and a portion thereof in an axial direction, respectively, so that it presents a structure and construction somewhat similar to a single rotor lamination disposed at an axially outermost end and a portion thereof. The rotor lamination 100 includes a center section 110 and a plurality of sectors 120 each extending radially from the center section 110. Wherein there is a shaft bore 111 within the central section 110; so as to mount the rotation shaft 230; and a permanent magnet installation space 130 is formed between the adjacent sector sections 120 so as to install the permanent magnet 220. Furthermore, a stop 121 is provided at the distal end of each segment 120 facing away from the central segment 110, which serves to limit the radial movement of the permanent magnets mounted in the permanent magnet mounting space 130. In this embodiment, each segment 120 is further provided with a deformable positioning portion 122 in the side portion 120a, 120b, and each segment 120 is correspondingly provided with a yielding hole 123 inside the positioning portion 122, thereby achieving adjustment of the degree of interference of the permanent magnet and the rotor lamination at different assembly stages. For example, when the permanent magnet is fitted into the permanent magnet installation space 130, the positioning portion 122 is pressed by the permanent magnet to be deformed toward the relief hole 123 in the sector section 120, so that the permanent magnet 220 is not subjected to excessive wear due to interference fit or assembly error during the fitting into the permanent magnet installation space 130; for another example, when the positioning pin 240 is fitted into the relief hole 123, the positioning portion 122 is pressed by the positioning pin to be deformed toward the permanent magnet mounting space 130, so that the permanent magnets 220 that have been fitted in place are firmly positioned in the permanent magnet mounting space 130 of the rotor lamination 100.
On the basis of the foregoing embodiments, modifications may also be made to the respective parts of the rotor lamination or the connection positional relationship thereof to achieve other technical effects, as will be exemplified below.
For example, regarding the shape of the positioning portion 122 and the relief hole 123, the requirement of reliable processing and positioning is mainly considered. As one example, the positioning portion 122 may be provided in a trapezoidal structure; and the relief holes 123 may be provided in a rectangular configuration.
As another example, there are various possibilities regarding the number and positions of the positioning portions 122. Meanwhile, it should be noted that the relief holes 123 are used in cooperation with the positioning portions 122 in the present application, so that the number and the setting positions of the relief holes should be changed according to the number and the positions of the positioning portions. Although one positioning portion 122 and a corresponding positioning hole 123 are provided on one of the side portions 120a and 120b of each segment 120 in the drawing, as another example, a plurality of positioning portions 122 and a corresponding positioning hole 123 may be provided on the side portions 120a and 120b of each segment 120, so as to achieve multi-point compression assembly of the permanent magnets and provide more reliable fixation. More specifically, the plurality of positioning portions 122 may be provided at both side portions 120a, 120b of each of the sectorial sections 120, respectively, that is, there is a positioning structure at both sides of either one of the permanent magnet installation spaces 130, thereby providing more reliable fixation of the permanent magnets.
For another example, the positioning portions 122 may also be disposed on the side portions 120a, 120b of each sector 120 away from the center section 110, and the relief holes 123 are correspondingly disposed inside the positioning portions 122. Since the sector 120 has a larger width at a position far from the center 110, the provision of the relief holes therein has a relatively smaller influence on the structural strength of the sector, and thus the structure has higher reliability.
As shown in fig. 1, each positioning portion 122 may be disposed on a side 120b of each sector 120 with the same orientation, so as to further facilitate processing of the positioning structure.
With continued reference to fig. 1-6, an embodiment of a rotor assembly 200 is also provided herein. The rotor assembly includes a rotor core 210, permanent magnets 220, a rotating shaft 230, and a locating pin 240. The rotor core 210 is formed by stacking a plurality of rotor laminations 100, and each rotor lamination 100 has a shaft hole 111 for mounting a rotating shaft 230, a permanent magnet mounting space 130 for mounting a permanent magnet 220, and a relief hole 123 for mounting a positioning pin 240. More importantly, at least a portion of the plurality of rotor laminations 100 used to construct the aforementioned rotor core 210 should be configured as a rotor lamination 100 in any of the aforementioned embodiments or combinations thereof. With this arrangement, the rotor assembly can avoid excessive wear or even damage to the rotor core 210 or the permanent magnets 220 during assembly, and can still achieve reliable fixing of the permanent magnets 220 after assembly is completed. In addition, for some rotor assemblies, when a plurality of rotor laminations 100 are stamped and stacked into a rotor core 210 during assembly, although adjacent rotor laminations 100 have been attached to one another by riveting, the bond therebetween is not tight for ease of adjustment or other handling. At this time, after the positioning pins 240 are inserted into the relief holes 123, the coupling therebetween can be made tighter by pressing the respective rotor laminations 100.
For example, referring to fig. 1 to 2, at this time, the permanent magnet 220 and the positioning pin 240 are not yet installed in the rotor core 210 of the rotor assembly 200, and the positioning portion 122 and the yielding hole 123 are in an unpressurized initial state, and each has an initial profile. Referring again to fig. 3-4, at this time, permanent magnets 220 (e.g., magnets) have been installed through the permanent magnet installation spaces 130 of each rotor lamination 100 of the rotor core 210 and pressed against the rotor lamination 100 having the positioning portions 122 at least partially therein during the installation process, pressing the positioning portions 122 thereof to deform toward the relief holes 123 side. Under the action of the azimuth space provided by the relief hole 123 and the deformation capability of the positioning portion 122, the permanent magnet 220 is fitted into the permanent magnet mounting space 130 with less resistance. Referring next to fig. 5-6, the locating pin 240 has been installed into the yield hole 123 at this point. Since the positioning pin 240 and the yielding hole 123 which is not deformed originally have shapes matched with each other, as the positioning pin 240 is inserted, the deformed portion in the yielding hole 123 is gradually extruded, so that the positioning portion 122 returns to its original contour or approaches to its original contour, thereby completing interference fit with the permanent magnet 220 and realizing reliable fixation of the permanent magnet in the rotor core 210.
On the basis of the foregoing embodiments, modifications may be made to the respective parts of the rotor assembly or the connection positional relationship thereof to achieve other technical effects, as will be exemplified below.
For example, the plurality of rotor laminations 100 comprising the rotor core 210 described above may all employ the rotor laminations 100 having the locating portions and the relief holes of any of the embodiments or combinations described above to provide a sufficient degree of clamping firmness for the permanent magnets mounted in the permanent magnet mounting space 130; such rotor lamination may be only partially employed as long as the resultant force of the positioning portions can firmly clamp the permanent magnets mounted in the permanent magnet mounting space 130. As one example, when only a portion of the rotor lamination 100 has the positioning portion and the relief hole, the portion of the rotor lamination 100 may be axially arranged at one end portion of the rotor core 210. As another example, the locating portions and relief holes may also be axially spaced within the rotor core 210.
Further, although at least some of the rotor laminations 100 in the rotor core 210 may employ rotor laminations 100 having locating features and relief holes in any of the foregoing embodiments or combinations. However, the specific arrangement positions of the rotor lamination abdication holes and the positioning portions are not required to be further limited. As an example, relief holes 123 and detents 122 of each rotor lamination 100 may be staggered in a radial direction of sector 120. As another example, the relief holes 123 and the positioning portions 122 of each rotor lamination 100 may also have the same positioning.
Referring again to fig. 7, there is shown a construction of the locating pin 240 having a generally rectangular main body portion with a tapered conical boss provided at one end of the main body portion, thereby facilitating insertion of the locating pin 240 into the yield hole 123. It should be understood that the configuration of the locating pin shown herein is for illustrative purposes and that any structural or shape modification may be made so long as the modification thereof does not interfere with the function of locating the permanent magnet of the present application. Correspondingly, the relief holes for receiving the same may be modified in any configuration or shape.
Furthermore, although not shown in the drawings, the present application also provides an embodiment of an electric motor, on which any embodiment of the rotor lamination 100 or a combination thereof, or any embodiment of the rotor assembly 200 or a combination thereof may be provided according to application requirements, thereby also having technical effects brought about by the foregoing technical solutions.
The above detailed description is illustrative of the present application and is not intended to be limiting. In order to describe the relative positional relationship, the present application uses relative terms such as left, right, up, down, etc., and is not limited to absolute positions. Various changes and modifications may be made to the technical solution of the present application by one of ordinary skill in the related art without departing from the scope of the present application, and thus, all equivalent technical solutions are also within the scope of the present application, which is defined by the claims.
Claims (11)
1. A rotor lamination (100), characterized by comprising:
a center section (110) having a shaft hole (111) within the center section (110); and
-A plurality of sectors (120) extending radially from the central section (110), respectively; and forming a permanent magnet installation space (130) between adjacent sector sections (120); each sector (120) is provided with a stop (121) at a distal end facing away from the central section (110), and the stop (121) is used for limiting the permanent magnet mounted in the permanent magnet mounting space (130) to move along the radial direction;
Wherein, each sector (120) is provided with a deformable positioning part (122) at the side parts (120 a, 120 b), and each sector (120) is correspondingly provided with a yielding hole (123) at the inner side of the positioning part (122); when the permanent magnet is installed in the permanent magnet installation space (130), the positioning part (122) is pressed by the permanent magnet to face the yielding hole (123) in the sector section (120) to deform, and when the positioning pin is inserted into the yielding hole (123), the positioning part (122) is pressed by the positioning pin to face the permanent magnet installation space (130) to deform and press the permanent magnet.
2. The rotor lamination (100) according to claim 1, characterized in that the positioning pin has a shape that matches the originally undeformed relief hole (123), wherein one end of the positioning pin is provided with a tapering conical boss and is inserted into the relief hole (123) through the tapering conical boss.
3. The rotor lamination (100) of claim 1, wherein a plurality of locating portions (122) are provided on side portions (120 a, 120 b) of each sector (120), and each sector (120) is provided with a plurality of relief holes (123) on an inner side of the plurality of locating portions (122), the locating portions (122) having opposite first and second sides, the first sides of the locating portions (122) facing the corresponding permanent magnet mounting spaces (130), and the second sides of the locating portions (122) facing the corresponding relief holes (123).
4. A rotor lamination (100) according to claim 3, characterized in that a plurality of the positioning portions (122) are provided on both sides (120 a, 120 b) of each sector (120), respectively.
5. The rotor lamination (100) according to claim 1, characterized in that the positioning portions (122) are provided on the sides (120 a, 120 b) of each sector (120) remote from the central section (110), and the relief holes (123) are correspondingly provided on the inner sides of the positioning portions (122).
6. The rotor lamination (100) according to claim 1, characterized in that each positioning portion (122) is provided on a side portion (120 a, 120 b) of each sector (120) having the same orientation.
7. A rotor assembly (200), comprising:
A rotor core (210) formed by stacking a plurality of rotor laminations (100); each rotor lamination (100) is provided with a shaft hole (111), a permanent magnet installation space (130) and a yielding hole (123);
a permanent magnet (220) installed in the permanent magnet installation space (130);
A rotating shaft (230) mounted in the shaft hole (111); and
A positioning pin (240) mounted in the relief hole (123);
Wherein at least a portion of a plurality of said rotor laminations (100) are configured as a rotor lamination (100) as claimed in any one of claims 1 to 6.
8. The rotor assembly (200) of claim 7, wherein at least a portion of a plurality of the rotor laminations (100) are each axially disposed at one end of the rotor core (210); or at least a portion of the plurality of rotor laminations (100) are axially spaced within the rotor core (210).
9. The rotor assembly (200) of claim 7, wherein all of the plurality of rotor laminations (100) are configured as the rotor lamination (100) of any one of claims 1 to 6.
10. The rotor assembly (200) of claim 7, wherein in the rotor lamination (100) of any one of claims 1 to 5, the relief holes (123) and the locating portions (122) of each rotor lamination (100) are staggered in a radial direction of the scalloped section (120).
11. An electric machine, comprising: the rotor lamination (100) of any one of claims 1 to 5, or the rotor assembly (200) of any one of claims 7 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911118752.7A CN112821612B (en) | 2019-11-15 | 2019-11-15 | Rotor lamination, rotor assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911118752.7A CN112821612B (en) | 2019-11-15 | 2019-11-15 | Rotor lamination, rotor assembly and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112821612A CN112821612A (en) | 2021-05-18 |
| CN112821612B true CN112821612B (en) | 2024-06-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911118752.7A Active CN112821612B (en) | 2019-11-15 | 2019-11-15 | Rotor lamination, rotor assembly and motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN112821612B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846857A (en) * | 1981-09-11 | 1983-03-18 | Fanuc Ltd | Manufacture of rotor for synchronous motor |
| CN104011975A (en) * | 2011-12-23 | 2014-08-27 | 博泽沃尔兹堡汽车零部件有限公司 | Rotor blade set of electric motor |
| CN104254963A (en) * | 2012-05-02 | 2014-12-31 | 罗伯特·博世有限公司 | Positioning a permanent magnet in a rotor or stator |
| CN104393730A (en) * | 2013-08-05 | 2015-03-04 | 通用电气公司 | Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof |
| CN104871402A (en) * | 2013-04-11 | 2015-08-26 | 标立电机有限公司 | Permanent magnet rotor for an electronically commutated dc motor |
| WO2018059877A1 (en) * | 2016-09-27 | 2018-04-05 | BSH Hausgeräte GmbH | Electric drive motor |
| CN110022017A (en) * | 2018-01-10 | 2019-07-16 | 标立电机有限公司 | P-m rotor |
-
2019
- 2019-11-15 CN CN201911118752.7A patent/CN112821612B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846857A (en) * | 1981-09-11 | 1983-03-18 | Fanuc Ltd | Manufacture of rotor for synchronous motor |
| CN104011975A (en) * | 2011-12-23 | 2014-08-27 | 博泽沃尔兹堡汽车零部件有限公司 | Rotor blade set of electric motor |
| CN104254963A (en) * | 2012-05-02 | 2014-12-31 | 罗伯特·博世有限公司 | Positioning a permanent magnet in a rotor or stator |
| CN104871402A (en) * | 2013-04-11 | 2015-08-26 | 标立电机有限公司 | Permanent magnet rotor for an electronically commutated dc motor |
| CN104393730A (en) * | 2013-08-05 | 2015-03-04 | 通用电气公司 | Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof |
| WO2018059877A1 (en) * | 2016-09-27 | 2018-04-05 | BSH Hausgeräte GmbH | Electric drive motor |
| CN109792175A (en) * | 2016-09-27 | 2019-05-21 | Bsh家用电器有限公司 | Electric drive motor |
| CN110022017A (en) * | 2018-01-10 | 2019-07-16 | 标立电机有限公司 | P-m rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112821612A (en) | 2021-05-18 |
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