WO2002089301A1 - Core and magnet structure for electric generators - Google Patents
Core and magnet structure for electric generators Download PDFInfo
- Publication number
- WO2002089301A1 WO2002089301A1 PCT/KR2002/000789 KR0200789W WO02089301A1 WO 2002089301 A1 WO2002089301 A1 WO 2002089301A1 KR 0200789 W KR0200789 W KR 0200789W WO 02089301 A1 WO02089301 A1 WO 02089301A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator cores
- permanent magnets
- core
- cores
- magnet structure
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K53/00—Alleged dynamo-electric perpetua mobilia
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
-
- 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
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The object of this invention is to provide a core and magnet structure for electric generators, fabricated by arranging several rows of stator cores (14) and a single row of permanent magnets (3, 3-1), or a single row of stator cores (4, 4-1) and several rows of permanent magnets (13) such that the cores and magnets come into contact with each other at the same time to form contact areas. In this core and magnet structure, the stator cores and the permanent magnets are arranged to divide each of the contact areas into two equal parts around the central axes of the magnets (3, 3-1) or the central axes of the cores (4, 4-1). Due to such a division of contact areas, it is possible to prevent concentration of attractive force between the cores and magnets, and prevent a drive shaft from being overloaded, vibrated or generating noises.
Description
COREAND MAGNET STRUCTUREFORELECTRIC GENERATORS
Technical Field
The present invention relates generally to a core and magnet structure for electric generators, and more particularly, to a core and magnet structure for electric generators, which uniformly distributes an attractive force originating from a magnetic force between permanent magnets and stator cores, thus preventing a drive shaft driven by external power from being overloaded, vibrated or generating noises.
Background Art
As shown in Fig. 1, a conventional electric generator is designed such that permanent magnets of a supporting rotor 2 are rotated to induce an electromotive force on induction coils 5 of stator cores 4 when a drive shaft 1 is rotated by external power, such as waterpower, wind power, thermal power, or atomic power. In this case, each of the stator cores 4 has an integrated structure which is circumferentially arranged with respect to the drive shaft 1 in the same manner as the permanent magnets 3.
Since there is generated an attractive force originating from a magnetic force between the stator cores 4 constructed in this way and the permanent magnets 3, the stator cores 4 hinder the permanent magnets 3 from rotating, thus
causing the overload of the drive shaft 1.
As shown in Fig. 2, when one of the stator cores 4 approaches one of the permanent magnets 3 to become aligned with each other, the strongest attractive force 10 is generated. On the other hand, when one of the permanent magnets 3 is positioned between two stator cores 4, the attractive force 10 is distributed according to the sizes of the contact areas between the permanent magnet 3 and the stator cores 4.
In other words, as shown in Fig. 3, when a single row of permanent magnets 3 are rotated, the contact areas between the permanent magnets 3 and each stator core 4 are different. At this time, there occurs an imbalance of the attractive force 10 due to the different contact areas. Such an imbalance of the attractive force 10 acts as a resistance to the rotation of the permanent magnets 3.
Imbalanced distribution of the attractive force 10 originating from a magnetic force between several rows of stator cores 4 and a single row of permanent magnets 3 acts as a resistance to the rotation of the permanent magnets 3, thus preventing the permanent magnets 3 from being smoothly rotated.
Therefore, the attractive force 10 between the stator cores 4 and the permanent magnets 3 imposes overload on the drive shaft 1 , and reduces the rotating speed of the drive shaft 1. When the rotating speed of the drive shaft 1 is reduced, the electromotive force inducing efficiency is reduced corresponding to the reduced rotating speed.
When the drive shaft 1 is rotated at a preset rotating speed under this
condition, the external power, such as waterpower, wind power, steam power, or atomic power, may be excessively consumed, thus undesirably reducing the energy production efficiency.
In addition, when the permanent magnets 3 having a stronger magnetic force are used to induce a larger amount of electromotive force on the induction coils 5, the attractive force between the permanent magnets 3 and the stator cores 4 becomes stronger, thus making the above problem more serious.
Furthermore, while one of the permanent magnets 3 moves from one stator core 4 to another stator core 4, the attractive force 10 between the first stator core 4 and the permanent magnet 3 is momentarily nullified. At this time, there occurs a vibration. Due to the vibration repetitively transmitted to the drive shaft 1, a bearing 8 of the shaft 1 is damaged, thus generating noises.
Disclosure of the Invention
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a core and magnet structure for electric generators, fabricated by arranging several rows of stator cores and a single row of permanent magnets, or a single row of stator cores and several rows of permanent magnets to divide each of the contact areas between them into two equal parts around the central axes of the magnets or the central axes of the cores, thus preventing concentration of attractive force between the cores and magnets, and preventing a drive shaft from being overloaded, vibrated or generating noises.
In order to accomplish the above object, the present invention provides a core and magnet structure for an electric generator designed such that permanent magnets of a supporting rotor are rotated to induce an electromotive force on induction coils of stator cores when a drive shaft is driven by external power, wherein the stator cores and the permanent magnets are arranged such that when several rows of stator cores and a single row of permanent magnets, or a single row of stator cores and several rows of permanents magnets come into contact with each other at the same time to form contact areas, the stator cores and the permanent magnets divide each of the contact areas into two equal parts around central axes of the permanent magnets or central axes of the stator cores.
Furthermore, according to this invention, the stator cores or permanent magnets are stacked up in such a way as to maintain regular intervals between rows of cores or magnets, and each stator core or permanent magnet have a rectangular or parallelogram-shaped cross-section, and are stacked up in such a way as to be inclined at a predetermined angle, or are stacked up in a zigzag pattern in such a way as to be symmetrical with respect to the central axes of the permanent magnets.
Brief Description of the Drawings
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a perspective view showing the structure of a conventional
electric generator;
Fig. 2 is a view showing the change of attractive force between several rows of stator cores and a single row of permanent magnets included in the conventional electric generator; Fig. 3 is a view illustrating an imbalance of attractive force between the several rows of stator cores and the single row of permanent magnets included in the conventional electric generator;
Fig. 4 is a perspective view showing an electric generator according to the primary embodiment of the present invention; Figs. 5a and 5b are views showing methods of arranging stator cores included in the electric generator according to the primary embodiment of the present invention;
Fig. 6 is a perspective view of an electric generator according to the second embodiment of the present invention; Figs. 7a and 7b are views showing methods of arranging stator cores included in the electric generator according to the second embodiment of the present invention;
Fig. 8 is a perspective view showing an electric generator according to the third embodiment of the present invention; Fig. 9 is a view showing a method of arranging stator cores included in the electric generator according to the third embodiment of the present invention;
Fig. 10 is a view illustrating contact areas between several rows of stator cores and a single row of permanent magnets, said contact areas being
divided into two equal parts around the central axes of the magnets or the central axes of the cores;
Fig. 11 is a view showing each row of permanent magnets coming into contact with the stator cores for inducing an electromotive force in the electric generator of this invention;
Fig. 12 is a perspective view showing an electric generator according to the fourth embodiment of the present invention;
Fig. 13 is a perspective view of an electric generator according to the fifth embodiment of the present invention; Fig. 14 is a perspective view of an electric generator according to the sixth embodiment of the present invention; and
Figs. 15 and 16 are views illustrating contact areas between a single row of stator cores and several rows of permanent magnets, said contact areas being divided into two equal parts around the central axes of the magnets or the central axes of the cores.
Best Mode for Carrying Out the Invention
Reference should now be made to the drawings, in which the same reference numerals are used throughout the different drawings to designate the same or similar components. As shown in Fig. 4, stator cores 14 according to the primary embodiment of the present invention are stacked up in such a way that their rows are arranged at regular intervals in an axial direction, and additionally, the stator
cores 14 are stacked up stepwise in such a way that their rows are arranged at regular intervals in a circumferential direction, differently from the conventional stator cores 4 having an integrated structure. An induction coil 15 winds around each row of stator cores 14 which are divided into several equal rows, so as to induce the electromotive force.
The rows of stator cores 14 are arranged in such a way that the stator cores 14 in each row are stacked up to be inclined at a predetermined angle with respect to an axis. As shown in Fig. 4, a snap ring 7 is provided between layers of the stator cores 14 to define a space between them. In this case, the stator cores 14 are fixedly stacked up by fitting a bolt shaft into each core fastening hole 6.
Assuming that the circumferential length λ between the core Al and the core Bl is divided into six equal parts as shown in Fig. 5a, five cores A2, A3, A4, A5 and A6 are arranged stepwise. Alternatively, assuming that the circumferential length λ between the core Al and the core Bl is divided into six equal parts as shown in Fig. 5b, five cores A2, A3, A4, A5 and A6 may be arranged irregularly, different from the method of stacking the rows stepwise shown in Fig. 5a.
The stator cores 14 each may have a rectangular cross-section as shown in Figs. 5a and 5b. Alternatively, the stator cores 14 may have a parallelogram- shaped cross-section inclined at a constant angle as shown in Fig. 6 which shows the second embodiment of the present invention. Such cross-sections allow the permanent magnets 3 to be smoothly rotated without being affected by the attractive force 10 originating from the magnetic force when the permanent
magnets 3 are rotated, because the stator cores 14 having such cross-sections are continuously stacked up.
Since the stator cores 14 having the parallelogram-shaped cross- sections as shown in Figs. 7a and 7b are similar to the stator cores 14 shown in Figs. 5a and 5b, they will not be described in detail hereinafter.
According to the third embodiment of this invention of Fig. 8, the stator cores 14 having parallelogram-shaped cross-sections are arranged in a zigzag pattern and stacked up in such a way as to be symmetrical with respect to a central axis m-m of the permanent magnet 3. At the contact areas between the stator cores 14 arranged in a zigzag pattern and each permanent magnet 3, at any place, it will be understood that the total of right and left areas (shaded portions) around the central axis of the permanent magnet 3 are the same. The attractive force between two rows of stator cores and any permanent magnet 3 is equal to the attractive force between the attractive force between any other two rows of stator cores and the corresponding permanent magnet 3, so the permanent magnet 3 is smoothly rotated without any resistance.
The concrete reason why the stator cores 14 are stacked up is as follows. That is, one of the permanent magnets 3 sequentially passes the rows A to K of stator cores 14, as shown in Fig. 10.
For example, when one of the permanent magnets 3 is rotated by the drive shaft 1 and passes the row A of stator cores 14, the maximum electromotive power is induced between the permanent magnet 3 and the core Al. At this time, one of the permanent magnets 3 comes into contact with the
cores Al, A2, A3, A4, A5 and A6 of the row A and the cores K6, K7, K8, K9 and K10 of the row K at the same time, and generates the attractive force 10 originating from a magnetic force.
In this case, compared with the contact areas between the permanent magnet 3 and the stator cores 14 around the central axis of the permanent magnet 3, the sum of areas ( I ) and (II ) is equal to the sum of areas (HI) and (IV).
Therefore, since the contact areas, divided by the central axes of the permanent magnets 3, between the permanent magnets 3 and the stator cores 14 are equal to each other, the permanent magnets 3 smoothly pass over the stator cores 14 without being affected by the attractive force 10 when coming into contact with the stator cores 14. That is, the permanent magnets 3 pass over the stator cores 14 without resistance or vibration caused by the attractive force 10. Fig. 11 shows the permanent magnets la ~ 10a passing the rows A ~ J of the stator cores 14 for inducing electromotive force. The attractive force 10 between two rows of stator cores 14 and the permanent magnet 3 is uniformly distributed, thus allowing the permanent magnet 3 to be smoothly rotated, therefore increasing the induction efficiency of electromotive force. According to the fifth embodiment of this invention, as shown in Fig.
13, each of the permanent magnets 3 combining with the stator cores 14 may be divided into several equal parts 3-1. Those skilled in the art will appreciate that this invention more effectively accomplishes the above objects when the parts 3- 1 combine with the stator cores 14.
In this case, the parts 3-1 of the north pole N and the parts 3-1 of the south pole S are alternately arranged.
As shown in Figs. 15 and 16, the stator cores 14 having the above- mentioned structure may be applied to permanent magnets 13, in the same manner as the permanent magnets 3 of the above mentioned embodiments. The permanent magnets 13 are stacked up inclinedly or in a zigzag pattern in such a way that their north and south poles N and S are alternately arranged. Even when such permanent magnets 13 combine with the conventional stator cores 4 having an integrated structure, the objects and effects of this invention are achieved.
That is, when the stator cores 4 combine with the permanent magnets 13, the permanent magnets 13 are smoothly rotated without being affected by the attractive force 10, in the same manner as when the stator cores 14 combine with the permanent magnets 3. Thus, the permanent magnets 13 are rotated without any resistance, so there is no vibration or noise. Therefore, strong electromotive force can be induced with little external power.
As shown in Fig. 14, the stator cores 4 may be divided into equal parts 4-1, and the equal parts 4-1 may be stacked up. It is more preferable that the equal parts 4-1 combine with the permanent magnets 13. According to this invention, the stator cores and the permanent magnets are arranged such that when several rows of stator cores 14 and a single row of permanent magnets 3 or 3-1, or a single row of stator cores 4 or 4-1 and several rows of permanents magnets 13 come into contact with each other at the same time to form contact areas, the stator cores and the permanent magnets divide
each of the contact areas into two equal parts around central axes of the permanent magnets 3 or 3-1 or central axes of the stator cores 4 or 4-1. That is, it is apparent that the present invention does not limit to the core and magnet structure described herein. As show in Fig. 12, the stator cores 4, 4-1 or 14 may have a double structure, with contact surfaces formed on an inner circumferential surface and an outer circumferential surface thereof. In this case, the permanent magnets 3, 3-1 or 13 are arranged to correspond the stator cores 4, 4-1 or 14 having a double structure. When such stator cores 4, 4-1 or 14 combine with the permanent magnets 3, 3-1 or 13, it is possible to make the structure more compact and the induced electromotive force is doubled.
Furthermore, the structure combining the stator cores 14 and the permanent magnets 3 or 3-1, and the structure combining the permanent magnets 13 and the stator cores 4 or 4-1 may be widely applied to several electrical apparatuses as well as electric generators.
Industrial Applicability
As described above, the present invention provides an improved structure for an electric generator, which allows strong electromotive force to be generated with little external power, thus accomplishing high efficiency, low vibration and low noise, and which is widely applied to electrical apparatuses for inducing electromotive force using rotors and stators.
Although the preferred embodiments of the present invention have been
disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims
1. A core and magnet structure for an electric generator designed such that permanent magnets of a supporting rotor are rotated to induce an electromotive force on induction coils of stator cores, when a drive shaft is driven by external power, wherein the stator cores and the permanent magnets are arranged such that when several rows of stator cores and a single row of permanent magnets, or a single row of stator cores and several rows of permanents magnets come into contact with each other at the same time to form contact areas, the stator cores and the permanent magnets divide each of the contact areas into two equal parts around central axes of the permanent magnets or central axes of the stator cores.
2. The core and magnet structure according to claim 1, wherein said stator cores or permanent magnets are stacked up in such a way as to maintains regular intervals between rows of stator cores or permanent magnets.
3. The core and magnet structure according to claim 2, wherein said stator cores or permanent magnets each have a rectangular or parallelogram- shaped cross-section.
4. The core and magnet structure according to claim 2 or 3, wherein said stator cores or permanent magnets are stacked up in such a way as to be inclined at a predetermined angle, or are stacked up in a zigzag pattern in such a way as to be symmetrical with respect to the central axes of the permanent magnets.
5. The core and magnet structure according to claim 1, wherein said stator cores each have a double structure, with contact surfaces formed on an inner circumferential surface and an outer circumferential surface thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010023274A KR20020083700A (en) | 2001-04-26 | 2001-04-26 | A motive not strength dynamo |
| KR2001-0023274 | 2001-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002089301A1 true WO2002089301A1 (en) | 2002-11-07 |
Family
ID=19708874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2002/000789 WO2002089301A1 (en) | 2001-04-26 | 2002-04-26 | Core and magnet structure for electric generators |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20020083700A (en) |
| WO (1) | WO2002089301A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004045939A1 (en) * | 2004-09-22 | 2006-04-06 | Siemens Ag | Permanent magnet synchronous machine with suppressing means for improving torque ripple |
| US8102092B2 (en) | 2006-01-24 | 2012-01-24 | Kabushiki Kaisha Yaskawa Denki | Split cores for motor stator, motor stator, permanent magnet type synchronous motor and punching method by split core punching die |
| DE102012016709A1 (en) * | 2012-06-11 | 2013-12-12 | Robert Bosch Gmbh | Permanent magnet-energized electric motor has air gap that is formed between directed protrusions that comprise portion that is partially offset and/or not extended in extension direction |
| JP2016187293A (en) * | 2015-03-27 | 2016-10-27 | アイシン精機株式会社 | Dynamo-electric machine |
| JP2018511298A (en) * | 2015-04-09 | 2018-04-19 | シェンジェン ギャム シャイン テクノロジー カンパニー リミテッド | Rotor and motor having the rotor |
| EP4068573A1 (en) * | 2021-03-25 | 2022-10-05 | Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie | A cogging electric machine and a method of operating the cogging electric machine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100449948B1 (en) | 2002-05-18 | 2004-09-30 | 주식회사 하이닉스반도체 | Method for fabricating contact plug with low contact resistance |
| KR101285823B1 (en) * | 2012-02-02 | 2013-07-12 | 성삼경 | The generator which the rotation developes the magnetic field system |
| KR101315870B1 (en) * | 2012-02-14 | 2013-10-08 | 프라미스전자(주) | Apparatus for multiphase generator |
| KR101974646B1 (en) * | 2016-11-02 | 2019-05-03 | 성삼경 | High efficiency self-generation devices |
| KR102143808B1 (en) * | 2018-11-30 | 2020-08-12 | 김희근 | Magnet generator |
| KR101968695B1 (en) * | 2018-12-24 | 2019-08-20 | 한기성 | Electron induction motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192134A (en) * | 1984-10-11 | 1986-05-10 | Matsushita Electric Ind Co Ltd | Motor |
| JPH05168182A (en) * | 1991-10-16 | 1993-07-02 | Sankyo Seiki Mfg Co Ltd | Brushless motor |
| JPH11234999A (en) * | 1998-02-17 | 1999-08-27 | Kokusan Denki Co Ltd | Brushless dc motor |
| JP2001037113A (en) * | 1999-07-23 | 2001-02-09 | Seiko Instruments Inc | Brushless motor |
-
2001
- 2001-04-26 KR KR1020010023274A patent/KR20020083700A/en active Search and Examination
-
2002
- 2002-04-26 WO PCT/KR2002/000789 patent/WO2002089301A1/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192134A (en) * | 1984-10-11 | 1986-05-10 | Matsushita Electric Ind Co Ltd | Motor |
| JPH05168182A (en) * | 1991-10-16 | 1993-07-02 | Sankyo Seiki Mfg Co Ltd | Brushless motor |
| JPH11234999A (en) * | 1998-02-17 | 1999-08-27 | Kokusan Denki Co Ltd | Brushless dc motor |
| JP2001037113A (en) * | 1999-07-23 | 2001-02-09 | Seiko Instruments Inc | Brushless motor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004045939A1 (en) * | 2004-09-22 | 2006-04-06 | Siemens Ag | Permanent magnet synchronous machine with suppressing means for improving torque ripple |
| DE102004045939B4 (en) * | 2004-09-22 | 2010-10-07 | Siemens Ag | Permanent magnet synchronous machine with suppressing means for improving torque ripple |
| US8102092B2 (en) | 2006-01-24 | 2012-01-24 | Kabushiki Kaisha Yaskawa Denki | Split cores for motor stator, motor stator, permanent magnet type synchronous motor and punching method by split core punching die |
| DE102012016709A1 (en) * | 2012-06-11 | 2013-12-12 | Robert Bosch Gmbh | Permanent magnet-energized electric motor has air gap that is formed between directed protrusions that comprise portion that is partially offset and/or not extended in extension direction |
| JP2016187293A (en) * | 2015-03-27 | 2016-10-27 | アイシン精機株式会社 | Dynamo-electric machine |
| JP2018511298A (en) * | 2015-04-09 | 2018-04-19 | シェンジェン ギャム シャイン テクノロジー カンパニー リミテッド | Rotor and motor having the rotor |
| EP3282560A4 (en) * | 2015-04-09 | 2018-12-19 | Shenzhen Gam Shine Technology Co. Limited | Rotor and motor having rotor |
| JP2020099199A (en) * | 2015-04-09 | 2020-06-25 | シェンジェン ギャム シャイン テクノロジー カンパニー リミテッド | Rotor and motor having the same |
| EP4068573A1 (en) * | 2021-03-25 | 2022-10-05 | Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie | A cogging electric machine and a method of operating the cogging electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020083700A (en) | 2002-11-04 |
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