KR101618357B1 - Electric generator - Google Patents
Electric generator Download PDFInfo
- Publication number
- KR101618357B1 KR101618357B1 KR1020150056185A KR20150056185A KR101618357B1 KR 101618357 B1 KR101618357 B1 KR 101618357B1 KR 1020150056185 A KR1020150056185 A KR 1020150056185A KR 20150056185 A KR20150056185 A KR 20150056185A KR 101618357 B1 KR101618357 B1 KR 101618357B1
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- KR
- South Korea
- Prior art keywords
- case
- armature
- field
- ring core
- plate
- Prior art date
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- 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
- H02K1/17—Stator cores with permanent magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The present invention relates to a generator, and more particularly, to a generator having a case having an upper case disposed on the upper side and a lower case coupled to a lower portion of the upper case, A shaft portion rotatably installed in the case; A field magnet disposed on the upper side and the lower side of the shaft portion inside the case and having a plurality of permanent magnets arranged on one surface thereof; An armature disposed between the field and coupled to the case, the armature having a plurality of coils arranged therein; Wherein the magnet has a base fixed to the shaft portion so as to be rotatable together with the shaft portion, a ring core having one surface fixedly seated on the base and a plurality of permanent magnets arranged and fixed on the other surface, Silicon is formed by winding a thin plate strip having a predetermined weight ratio and fixing it with an impregnation agent, and the thin plate strip is formed to have a thickness of 0.5 mm or less.
The generator according to the present invention is a generator in which a ring core formed by superposing a silicon thin plate containing silicon in place of a conventional iron plate is used as a yoke in which permanent magnets are installed to reduce the iron loss and increase the relative permeability, .
Description
The present invention relates to a generator, and more particularly, to a generator for producing electric energy using wind power, in which a ring core formed by superimposing a silicon steel sheet in a ring shape on a field where a magnet is installed is applied to reduce iron loss To a generator capable of increasing power generation efficiency.
There are various types of generators, and two types of generators that are structurally different among the types using permanent magnets for field magnets are described in order.
A generator of a radial gap type in which a stator is arranged around the outer periphery of a cylindrical rotor is arranged in a direction in which a plurality of permanent magnets surround the circumference of the rotor and a magnetic pole of the permanent magnet Radially, and the stator is arranged to face the permanent magnet. The stator has a structure in which a coil is wound on an iron core having a plurality of teeth in a surface facing the rotor. By using such an iron core, the magnetic flux generated from the magnetic pole of the rotor can be passed through the coil, thereby generating a large torque in the case of a motor and a large voltage in the case of a generator.
However, there is a problem that the use of the iron core causes loss torque based on cogging torque or hysteresis loss of the iron core, thereby increasing the initial torque. This problem can be solved by removing the iron core, but since the magnetic efficiency is lowered, there is a disadvantage that a large output can not be obtained in the radial gap type generator.
Also, as the Nacelle accommodating the generator is increased in the generator using the radial gap type, the wind receiving area of the propeller is reduced, and the rotational force of the propeller is lowered. That is, as the size of the generator becomes larger, the efficiency of wind power generation is lowered.
Another type is an axial gap type generator in which a stator is arranged so as to face axially opposite to a one-way rotor.
The generator of the axial gap type is attached to the case so that the yoke formed of an iron plate is integrated, and a plurality of permanent magnets are arranged on the surface of the yoke and arranged vertically in the fixed axis direction through the spacers. The permanent magnets may be arranged in any one of the yokes, but magnetic efficiency is enhanced by arranging permanent magnets on the surfaces of both yokes. An armature is disposed between the yokes. The armature is fixed to a base on which a plurality of coils are accommodated to form a stator, and is fixed to a fixed shaft. The fixed shaft is rotatably supported by the housing through a bearing.
Such a structure can increase the output without using an iron core (core) by enlarging the surface of the magnetic pole. Neodymium, which is one of rare earth metals, and neodymium magnet, which is a metal compound of iron (Fe) Nd-Fe-B) is used, there is no problem of magnetic saturation due to the iron core. Therefore, there is an advantage that the performance can be fully utilized and used as a high-output rotating machine.
However, as described above, the stator of the generator is mainly composed of the core and the armature coil, and the magnets are arranged on the rotor and the yoke, and the magnetic flux generated by the magnet and the electric current of the current are used to increase the weight of the generator as a whole. There is a limitation in shortening the width. In addition, since the yoke on which the armature coils are arranged is formed of an iron plate, the efficiency of the generator due to the iron loss is deteriorated.
SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to reduce the iron loss and increase the relative permeability by applying a ring core formed by superposing a silicon thin plate containing silicon instead of a conventional iron plate, And to provide a generator capable of enhancing power generation efficiency.
According to an aspect of the present invention, there is provided a generator including a case having an upper case disposed on the upper side and a lower case coupled to a lower portion of the upper case, A shaft portion rotatably installed in the case; A field magnet disposed on the upper side and the lower side of the shaft portion inside the case and having a plurality of permanent magnets arranged on one surface thereof; An armature disposed between the fields and coupled to the case, the armature having a plurality of coils arranged therein; Wherein the ring core comprises a base fixed to the shaft portion so as to be rotatable together with the shaft portion, a ring core having one surface fixedly seated on the base and a plurality of permanent magnets arranged and fixed on the other surface, And a hollow plate is formed on the inner side of the hollow plate and the thin plate strip is formed to have a thickness of 0.5 mm or less.
The field magnet further comprises an array portion provided on the other surface of the ring core to arrange the permanent magnets at a uniform interval along the circumferential direction of the ring core, An insertion groove having a size corresponding to the permanent magnet is formed so as to be spaced apart along the circumferential direction of the ring core.
Wherein the upper case includes an upper plate and an upper wall extending a predetermined length downward from an edge of the upper plate to form a first accommodation space between the upper plate and the lower plate, Wherein the armature has a height corresponding to an interval between the upper plate and the lower plate, and the inner diameter of the upper and lower walls is smaller than the inner diameter of the lower and upper walls, And an upper end fixed to the upper plate and a lower end fixed to the lower plate, and a fixing part extending from the inner circumferential surface of the fixing part toward the center of the fixing part and passing through the center so as to allow the shaft part to pass therethrough Holes are formed and a plurality of coils are arranged along the circumferential direction.
The armature is formed by molding and fixing a plurality of coils adjacent to each other in a position fixing portion provided inside a mold having a cavity corresponding to the outer shape of the armature, and then fixing the coils adjacent to each other.
Wherein the upper case has an upper plate, the lower case has a lower plate, the armature has an outer diameter corresponding to an outer diameter of the upper plate and the lower plate, an upper end fixed to the upper plate, and a lower end fixed to the lower plate, And a molding part extending from the inner circumferential surface of the fixing part toward the center of the fixing part and having a through hole formed at a center thereof so that the shaft part can pass therethrough and the coils being arranged adjacent to each other along the circumferential direction, And a coupling unit coupled to the upper plate, the fixing unit, and the lower plate to couple the upper case, the armature, and the lower case to each other.
Wherein the fixing portion is formed of aluminum and the armature has the fixing portion disposed inside a mold having a cavity corresponding to the outer shape of the armature and the plurality of coils are arranged and fixed adjacent to the position fixing portion provided inside the mold And then molded with a resin.
Wherein the armature further comprises a support portion for supporting the molding portion with respect to the fixing portion, wherein the support portion is fixed to the inner circumferential surface of the fixing portion at one side and the first support portion supports the bottom edge of the molding portion at the other side, And a second supporting part for fixing the upper surface of the molding of the molding part to the other side, wherein one side is fixed to the inner circumferential surface of the fixing part at the upper part of the molding part.
Wherein the upper case has an upper plate and the lower case has a lower plate, the field includes a first field provided on the upper side of the shaft and a plurality of permanent magnets arranged on a lower surface thereof, A second field provided on a shaft portion and having a plurality of permanent magnets arranged on an upper surface facing the lower surface of the first field; a second field provided on the shaft portion below the second field and having a plurality of permanent magnets arranged on a lower surface thereof; And a fourth field provided on the shaft at a lower portion of the third yoke and having a plurality of permanent magnets arranged on an upper surface facing the lower surface of the third field, Wherein the armature includes a first armature installed between the first field and the second field and a second armature provided between the third field and the fourth field, include Wherein the first armature has a first fixing part having an outer diameter corresponding to the outer diameter of the upper plate and having an upper end fixed to the upper plate and a second fixing part extending from the inner circumferential surface of the first fixing part toward the center of the first fixing part, Wherein the first armature includes a first through hole through which the shaft portion can pass and a plurality of coils are arranged adjacently to each other along the circumferential direction within the first armature, A second fixing part whose upper end is coupled to the lower end of the first fixing part and whose lower end is fixed to the lower fixing plate and which extends from the inner circumferential surface of the second fixing part toward the center of the second fixing part, And a second molding part having a plurality of coils arranged adjacent to each other along the circumferential direction, wherein the first molding part and the second molding part are disposed adjacent to each other in the circumferential direction, It characterized by further comprising a; 2 are fastened to pass through the lower plate and the fixed coupling part for coupling to each other the upper case and the armature and the lower case.
According to an aspect of the present invention, there is provided a generator including a case having an upper case disposed on the upper side and a lower case coupled to a lower portion of the upper case, A shaft portion installed in the case to rotatably support the case; A field magnet installed in the upper case and the lower case respectively and having a plurality of permanent magnets arranged therein; And an armature that is disposed between a field installed in the upper case and a field installed in the lower case and is coupled to the shaft and has a plurality of coils arranged therein, the field being fixed to the inner peripheral surface of the case, And the ring core is formed in a circular plate shape having a hollow portion formed inside by winding a thin plate strip, and the thin plate strip is formed to have a thickness of 0.5 mm or less .
The case includes an intermediate case having an outer diameter corresponding to an outer diameter of the upper case and the lower case and having an inner side partition wall and being coupled between the upper case and the lower case, A second field provided on an upper surface of the partition wall of the intermediate case at a lower portion of the first field; a third field provided at a lower surface of the partition wall of the intermediate case; Wherein the armature includes a first armature disposed between the first field and the second field and a second armature disposed between the third field and the fourth field, .
The generator according to the present invention is a generator in which a ring core formed by superposing a silicon thin plate containing silicon in place of a conventional iron plate is used as a yoke in which permanent magnets are installed to reduce the iron loss and increase the relative permeability, .
1 is an exploded perspective view of a generator according to a first embodiment of the present invention;
2 is a sectional view of a generator according to a first embodiment of the present invention shown in Fig.
Fig. 3 is a perspective view showing the arrangement of the field shown in Figs. 1 and 2. Fig.
4 is an exploded perspective view of a generator according to a second embodiment of the present invention;
5 is a sectional view of a generator according to a second embodiment of the present invention shown in Fig.
6 is a sectional view of a generator according to a third embodiment of the present invention;
7 is a cross-sectional view of a generator according to a fourth embodiment of the present invention;
8 is an exploded perspective view showing a generator according to a fifth embodiment of the present invention.
9 is a cross-sectional view of a generator according to a fifth embodiment of the present invention shown in FIG.
10 is an exploded perspective view of a generator according to another embodiment of the present invention;
11 is an exploded perspective view showing a state where coils are arranged in a mold for manufacturing an armature.
12 is an exploded perspective view showing an armature manufactured using the mold shown in Fig.
13 is an exploded perspective view of a generator according to a sixth embodiment of the present invention.
14 is an exploded perspective view of a generator according to a seventh embodiment of the present invention.
Fig. 15 is a test report showing equipment, method and information about a test object for testing a ring core applied to a field of a generator according to the present invention. Fig.
16 is a result table of the test report according to the thickness of the ring core applied to the field of the generator according to the present invention.
17 is a photograph showing test objects and test procedures of Figs. 15 and 16. Fig.
Hereinafter, a generator according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1 to 3 show a
The
The
The
The
The
3, the
The
The
The
The
The fixing
4 and 5 show a generator according to a second embodiment of the present invention. A generator (2) according to a second embodiment of the present invention comprises a case (110); A
The
The
The
In this embodiment, the fixing
The fixing
The
6 shows a generator according to a third embodiment of the present invention. The
The fixing portion may be formed of a resin composition for molding the
In the case of the
7 shows a generator according to a fourth embodiment of the present invention. Referring to FIG. 7, a
The support part has a
The support portion is for supporting the
8 and 9 show a generator according to a fifth embodiment of the present invention. A generator (5) according to a fourth embodiment of the present invention comprises a case; A
The case has the same structure as that of the
At the edges of the
The field magnet is coupled to the
The
The
The armature includes a
The
The
The
An upper portion of the
The
8 and 9 show a
11 and 12, the armature is provided with a plurality of
The mold 70 includes a
A raised portion 71A is formed at the center of the
The
A plurality of
13 shows a generator 6 according to a sixth embodiment of the present invention.
13, the generator 6 according to the sixth embodiment of the present invention is different from the generator according to the first embodiment of the present invention in that an outer rotor (rotor) in which the case is rotated with respect to the
The
The field includes a
The
The
14 shows a generator 7 according to a seventh embodiment of the present invention.
Referring to Fig. 14, a generator 7 according to a seventh embodiment of the present invention is similar to the generator 6 according to the sixth embodiment of the present invention shown in Fig. 13 except that the case rotates with respect to the shaft portion 320 A case including an
The case has an outer diameter corresponding to the outer diameter of the
A through hole is formed at the center of the
The field device includes a
Each of the first to
The armature includes a
The
Hereinafter, the iron loss change according to the thickness of the ring core applied to the generator according to the present invention will be described with reference to FIG. 15 to FIG. 17. FIG.
The equipment used was the "IronLoss & Hysteresis Characteristic Analyzer" as shown in FIG. 15, and the samples to be tested were four ring cores with thicknesses of 0.2 mm, 0.35 mm, 0.5 mm, and 0.7 mm , And the relative magnetic permeability was measured at 10 Hz (magnetic flux density) at 50 Hz and 60 Hz, respectively.
16, the core loss and relative permeability for
The core loss and relative permeability for
On the other hand, the core loss and relative permeability for
The core loss and relative permeability for
According to the above results, the iron loss was increased as the thickness of the samples increased from 0.2 mm to 0.7 mm at a frequency of 50 [Hz]. In particular, the iron loss rapidly increased between 0.5 mm and 0.7 mm of the sample thickness Respectively. Relative permeability at the same frequency was relatively similar between 0.2 mm and 0.5 mm in the thickness of the sample, but dropped sharply between 0.5 mm and 0.7 mm in the thickness of the sample.
On the other hand, at 60 [Hz], the iron loss increases as the sample thickness increases from 0.2 mm to 0.7 mm, as in the case of frequency 50 [Hz]. In particular, when the thickness of the sample is between 0.5 mm and 0.7 mm, It is shown that it increases sharply. Relative permeability at the same frequency was comparable to that at 50 [Hz] between 0.2 mm and 0.5 mm in the thickness of the sample, but dropped sharply when the thickness of the sample was between 0.5 mm and 0.7 mm.
According to the above measurement result, when the thickness of the thin strip forming the ring core is increased to 0.5 mm or more, the core loss of the ring core applied to the generator according to the present invention drastically increases in iron loss and the relative permeability also drastically decreases . Therefore, the ring core of the field applied to the generator according to the present invention has a thickness of the thin plate strip of 0.5 mm or less, preferably 0.2 mm to 0.5 mm for convenience of production.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments and constructions. It will be apparent to those skilled in the art that various modifications and variations can be made in the generator I will understand the point.
Therefore, the scope of the true technical protection of the present invention should be determined by the technical idea of the appended claims.
1: generator 10: case
11: upper case 12: top plate
15: lower case 16: lower plate
20: Axis 30: Fielder
31: base 32: ring core
33: permanent magnet 35: arrangement part
36: center portion 37:
40: armature 41:
45: molding part 46: coil
Claims (10)
A shaft portion rotatably installed in the case;
A field magnet disposed on the upper side and the lower side of the shaft portion inside the case and having a plurality of permanent magnets arranged on one surface thereof;
An armature disposed between the fields and coupled to the case, the armature having a plurality of coils arranged therein;
Wherein the magnet includes a base fixed to the shaft portion so as to be rotatable together with the shaft portion, and a ring core having one surface fixedly seated on the base and a plurality of permanent magnets arranged and fixed on the other surface,
Wherein the ring core is formed in a disc shape having a hollow portion formed therein by winding a thin strip, the thin strip being formed to have a thickness of 0.5 mm or less,
The field magnet further comprises an array portion provided on the other surface of the ring core to arrange the permanent magnets so as to be spaced apart at uniform intervals along the circumferential direction of the ring core,
The arrangement part is formed such that an insertion groove having a size corresponding to the permanent magnet is spaced apart along the circumferential direction of the ring core so that a part of the permanent magnet can be inserted,
Wherein the armature is formed by fixing a plurality of coils adjacent to each other in a position fixing portion provided inside a mold having a cavity corresponding to an outer shape of the armature and then molding the same with a resin.
The upper case includes an upper plate and an upper wall extending a predetermined length downward from an edge of the upper plate to form a first accommodation space between the upper plate and the upper plate,
The lower case includes a lower plate and a lower wall extending a predetermined length downward from an edge of the upper plate and forming a second accommodation space between the lower plate and the lower plate,
The armature having a height corresponding to an interval between the upper plate and the lower plate and having an outer diameter corresponding to an inner diameter of the upper and lower walls and having an upper end fixed to the upper plate and a lower end fixed to the lower plate; A through hole extending from the inner circumferential surface of the fixing portion toward the center of the fixing portion so as to allow the shaft portion to pass therethrough, and a plurality of coils arranged in the circumferential direction, generator.
A shaft portion rotatably installed in the case;
A field magnet disposed on the upper side and the lower side of the shaft portion inside the case and having a plurality of permanent magnets arranged on one surface thereof;
An armature disposed between the fields and coupled to the case, the armature having a plurality of coils arranged therein;
Wherein the magnet includes a base fixed to the shaft portion so as to be rotatable together with the shaft portion, and a ring core having one surface fixedly seated on the base and a plurality of permanent magnets arranged and fixed on the other surface,
Wherein the ring core is formed in a disc shape having a hollow portion formed therein by winding a thin strip, the thin strip being formed to have a thickness of 0.5 mm or less,
Wherein the upper case includes an upper plate, the lower case includes a lower plate,
Wherein the armature has a fixing portion having an outer diameter corresponding to an outer diameter of the upper and lower plates and having an upper end fixed to the upper plate and a lower end fixed to the lower plate, A through hole is formed through the shaft to allow the shaft to pass therethrough, and a molding part having the coils arranged adjacent to each other along the circumferential direction,
And a coupling unit coupled to the upper plate, the fixing unit, and the lower plate to couple the upper case, the armature, and the lower case to each other,
Wherein the fixing portion is formed of aluminum,
Wherein the armature is formed by disposing the fixing portion in a mold having a cavity corresponding to an outer shape of the armature, fixing a plurality of coils adjacent to each other in a position fixing portion provided inside the mold,
Wherein the armature further comprises a support portion for supporting the molding portion with respect to the fixing portion,
The supporting portion has a first supporting portion having one side fixed to the inner circumferential surface of the fixing portion and the other side supporting an edge lower surface of the molding portion and a second supporting portion having one side fixed to the inner circumferential surface of the fixing portion at the upper portion of the molding portion, And a second support portion for pressing the edge upper surface.
A shaft portion installed in the case to rotatably support the case;
A field magnet installed in the upper case and the lower case respectively and having a plurality of permanent magnets arranged therein;
And an armature disposed between the field provided in the upper case and the field provided in the lower case and coupled to the shaft portion and having a plurality of coils arranged therein,
The field magnet includes a ring core having one surface fixed to the inner circumferential surface of the case and a plurality of permanent magnets arranged and fixed to the other surface,
Wherein the ring core is formed in a disc shape having a hollow portion formed therein by winding a thin strip, the thin strip being formed to have a thickness of 0.5 mm or less,
The case includes an intermediate case having an outer diameter corresponding to an outer diameter of the upper case and the lower case, a partition wall provided on the inner side, and an intermediate case coupled between the upper case and the lower case,
A second field provided on the upper surface of the partition of the intermediate case at a lower portion of the first field; a third field provided at the lower surface of the partition of the intermediate case; And a fourth field provided in the lower case at a lower portion of the third field,
Wherein the armature includes a first armature disposed between the first field and the second field and a second armature disposed between the third field and the fourth field,
The field magnet further comprises an array portion provided on the other surface of the ring core to arrange the permanent magnets so as to be spaced apart at uniform intervals along the circumferential direction of the ring core,
The arrangement part is formed such that an insertion groove having a size corresponding to the permanent magnet is spaced apart along the circumferential direction of the ring core so that a part of the permanent magnet can be inserted,
Wherein the armature is formed by fixing a plurality of coils adjacent to each other in a position fixing portion provided inside a mold having a cavity corresponding to an outer shape of the armature and then molding the same with a resin.
The case includes an intermediate case having an outer diameter corresponding to an outer diameter of the upper case and the lower case, a partition wall provided on the inner side, and an intermediate case coupled between the upper case and the lower case,
A second field provided on the upper surface of the partition of the intermediate case at a lower portion of the first field; a third field provided at the lower surface of the partition of the intermediate case; And a fourth field provided in the lower case at a lower portion of the third field,
Wherein the armature includes a first armature disposed between the first field and the second field and a second armature disposed between the third field and the fourth field.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150056185A KR101618357B1 (en) | 2015-04-21 | 2015-04-21 | Electric generator |
| PCT/KR2016/004184 WO2016171500A1 (en) | 2015-04-21 | 2016-04-21 | Generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150056185A KR101618357B1 (en) | 2015-04-21 | 2015-04-21 | Electric generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR101618357B1 true KR101618357B1 (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150056185A KR101618357B1 (en) | 2015-04-21 | 2015-04-21 | Electric generator |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101618357B1 (en) |
| WO (1) | WO2016171500A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024010435A1 (en) * | 2022-07-08 | 2024-01-11 | 유형주 | Non-rotating electric power conversion device |
| WO2024010434A1 (en) * | 2022-07-08 | 2024-01-11 | 유형주 | Non-rotating power conversion device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3701809B2 (en) * | 1999-03-17 | 2005-10-05 | 株式会社三協精機製作所 | Small motor |
| JP2001086694A (en) * | 1999-09-16 | 2001-03-30 | Tokyo Parts Ind Co Ltd | Compact motor with ball bearing |
| KR100585691B1 (en) * | 2004-03-09 | 2006-06-07 | 엘지전자 주식회사 | Stator of bldc motor and manufacturing method thereof |
| US20080030088A1 (en) * | 2006-07-18 | 2008-02-07 | Daniel Gizaw | Compact integrated brushless permanent-magnet motor & drive |
| KR101263350B1 (en) * | 2011-02-16 | 2013-05-16 | 윤양운 | axial flux permanent magnet generator |
-
2015
- 2015-04-21 KR KR1020150056185A patent/KR101618357B1/en active IP Right Grant
-
2016
- 2016-04-21 WO PCT/KR2016/004184 patent/WO2016171500A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024010435A1 (en) * | 2022-07-08 | 2024-01-11 | 유형주 | Non-rotating electric power conversion device |
| WO2024010434A1 (en) * | 2022-07-08 | 2024-01-11 | 유형주 | Non-rotating power conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016171500A1 (en) | 2016-10-27 |
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