WO2013121786A1 - モータのステータ・コア - Google Patents
モータのステータ・コア Download PDFInfo
- Publication number
- WO2013121786A1 WO2013121786A1 PCT/JP2013/000812 JP2013000812W WO2013121786A1 WO 2013121786 A1 WO2013121786 A1 WO 2013121786A1 JP 2013000812 W JP2013000812 W JP 2013000812W WO 2013121786 A1 WO2013121786 A1 WO 2013121786A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator core
- coil
- residual stress
- compressive residual
- magnetic
- Prior art date
Links
Images
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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- H02K1/16—Stator cores with slots for windings
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- This invention relates to a stator core of a motor.
- Patent Document 1 discloses an embedded permanent magnet having a stator coil housed in a slot portion in a concentrated winding around a teeth portion of a stator core in order to meet the demands for higher torque, higher output, and space saving. Synchronous rotating electrical machines have been proposed. In this technology, the tooth spacing is increased by concentrated winding, and as a result, the leakage magnetic flux that passes through the slot portion that is not involved in the magnetic action with the rotor increases, so the conductor cross-sectional area of the coil conductor located at least on the coil surface side is reduced. It is disclosed that an eddy current generated in a coil by leakage magnetic flux is suppressed by adopting a configuration in which a plurality of conductive wires are connected in parallel.
- this stator core is formed by laminating a plurality of magnetic steel plates, and a hook portion is provided along the rotor rotation direction (circumferential direction) at the tip of each steel plate so that the magnetic flux from the rotor is directly applied. The problem of eddy current reaching the coil is suppressed.
- the eaves part is constituted by a plurality of magnetic plates stacked in a direction from the tip part of the tooth part toward the yoke part.
- the surface of each magnetic plate is almost perpendicular to the direction of the magnetic flux flowing from the rotor, so that the magnetic flux from the rotor is guided to the tooth portion along the surface of each magnetic plate and reaches the coil in the slot region.
- the amount of magnetic flux is reduced even if there is no space between it and the heel.
- the amount of magnetic flux that passes through the tooth portion increases, the amount of magnetic flux that contributes to torque also increases, the magnetic flux is efficiently used, and the high-performance stator that can increase the torque and output of the motor. Is obtained.
- the laminated magnetic plates have a separate structure from the stator core, and it is necessary to form a separate magnetic plate for each of the plurality of teeth, so the number of parts increases significantly, and the assembly and parts There was a problem that management became extremely complicated.
- the problem to be solved is that the conventional method of suppressing the leakage of magnetic flux that passes through the collar and reaches the coil requires a space between the collar and the coil, which is an obstacle to miniaturization, and the number of parts is extremely large. This is an increase in assembly and parts management.
- a stator core of a motor provided with a tooth portion projecting radially inward around the circumference, facing the coil formed around the tooth portion at the tip of the tooth portion projecting radially inward and rotating in the rotor direction It is provided with the collar part along the (circumferential direction), and has a compression residual stress part or a nonmagnetic part in the collar part for every single board which comprises and laminates a teeth part.
- stator core of the motor of the present invention has the above-described configuration, leakage of magnetic flux that passes through the flange and reaches the coil by the compression residual stress portion or the nonmagnetic portion of the flange can be suppressed, and the torque is increased and the output is increased. It is only necessary to form a compressive residual stress part or a non-magnetic part in the collar part, and it is not necessary to secure a space between the collar part and the coil. There is no increase, and assembly and parts management can be made extremely easy.
- Example 1 It is a block diagram which shows the outline of an electric motor.
- Example 1 It is a principal part perspective view which shows lamination
- Example 1 It is a principal part front view of a stator core.
- FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3.
- Example 1 It is sectional drawing which shows the crushing process of a collar part.
- Example 1 It is a principal part front view which shows a stator core with a motor case.
- Example 2 It is a principal part front view which shows a stator core with a motor case.
- Example 3 It is a block diagram which shows the outline of an electric motor.
- Example 1 It is a principal part perspective view which shows lamination
- Example 1 It is a principal part front view of a stator core.
- FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3.
- Example 1 It is sectional drawing which shows the
- a stator core 13 of a motor provided with a tooth portion 17 projecting radially inward on the circumference, facing a coil formed around the tooth portion 17 at the tip of the tooth portion 17 projecting radially inward.
- a stator core 13 of a motor having a flange portion 21 along the rotor rotation direction (circumferential direction) and having a compression residual stress portion S or a non-magnetic portion M on the flange portion 21 of each single plate constituting the teeth portion. did.
- FIG. 1 is a configuration diagram showing an outline of an electric motor
- FIG. 2 is a perspective view of a main part showing stacking of stator cores
- FIG. 3 is a front view of main parts of the stator core
- FIG. 4 is an IV of FIG. FIG.
- the circumferential direction and the radial direction mean the circumferential direction and the radial direction of the stator core.
- the circumferential direction is also the rotor rotation direction.
- the electric motor 1 includes a rotor 5 and a stator 7.
- the rotor 5 is attached to the rotary shaft 9.
- the stator 7 is arranged such that the inner peripheral surface faces the outer peripheral surface of the rotor 5 and is configured as a three-phase AC motor.
- the rotor 5 has a structure in which a plurality of members formed in an annular shape by punching a magnetic steel sheet are stacked, and is fixed to the rotary shaft 9 by shrink fitting or spline fitting.
- a permanent magnet 11 is attached to the outer diameter side of the rotor 5.
- the permanent magnets 11 are arranged so that the magnetic lines of force are directed in the radial direction and the direction of the magnetic poles is reversed every other magnet.
- the stator 7 includes a stator core 13 and a coil (not shown), and is attached to the motor case 8 with a tightening margin by shrinkage or the like.
- the stator core 13 has a laminated structure in which, for example, a plurality of annularly formed electromagnetic steel sheets are formed by punching, and protrudes radially inwardly on the annular yoke portion 15 and the inner periphery of the yoke portion 15.
- a tooth portion 17 is provided, and a coil is wound around the tooth portion 17 in a slot 19 between adjacent tooth portions 17.
- a collar portion 21 is provided at the tip of the teeth portion 17, a collar portion 21 is provided.
- the flange portion 21 is opposed to a coil formed around the tooth portion 17 in the radial direction.
- the flange portion 21 has a compressive residual stress portion S for reducing the leakage magnetic flux that passes through the coil and reaches the edge of the tooth 17.
- the compressive residual stress portion S is formed in a wedge shape by compressing one side in the stacking direction of the flange portion 21 of each single plate constituting the teeth portion 17 on the coil side edge 21a side. It is provided along the slope.
- the compressive residual stress portion S is formed only along the coil side edge 21a side of the flange portion 21, and the non-coil side edge of the flange portion 21 is not subjected to compression processing, and the original plate thickness is maintained. Yes.
- a space G is formed between each corresponding to the compressive residual stress portion S.
- the space G is formed in a wedge shape so as to be maximized on the coil side, contrary to the compressive residual stress portion S.
- FIG. 5 is a cross-sectional view showing compression processing of the buttocks.
- the flange portion 21 was compressed by the punch 23 and the die 25 to form a compressive residual stress portion S in the flange portion 21.
- the compression rate is inclined from the upper surface of the tooth side within the range of 1.5 times the plate thickness t from the coil side edge 21a to 50% at the coil side edge 21a. 5 is formed in a range of 0.5 t (coil side edge 21 a side) from the inclination start point of the upper surface of the flange portion 5.
- the compression rate is not limited to 50%, and can be arbitrarily set in accordance with the motor specifications and the like in relation to the magnetic permeability, strength, and heat dissipation of the flange 21 within a range exceeding or below 50%.
- the compression processing by the punch 23 and the die 25 is performed for each stator core 13 when the electromagnetic steel sheet is punched. This processing can also be performed before forming the final contour by being incorporated in a progressive die.
- the relationship between an increase in strength based on work hardening during compression deformation and a decrease in magnetic permeability is known, and as the degree of deformation increases, the magnetic permeability decreases and the strength increases.
- the cross section of the flange portion 21 is gradually thinned in a wedge shape toward the coil side edge 21a side, but the strength is increased. Since the coil side edge 21a side is a free end of the flange portion 21 in terms of structure, an increase in strength due to compression processing is advantageous when subjected to torque fluctuations or the like.
- the permeability decreases toward the coil side edge 21a closer to the coil.
- the problem that the magnetic flux from the rotor directly reaches the coil to generate eddy current can be suppressed, the reduction of the copper loss and the iron loss is synergized from the suppression of the temperature rise, and it can be applied to the high speed rotation and torque fluctuation.
- the compressive residual stress portion S is formed from the tip of the flange portion 21 to the base portion on the teeth portion 17 side along the coil side edge 21a, the compression residual stress portion S generally intersects the direction of the magnetic flux flowing from the rotor, The non-coil side edge side in the radial direction from the compressive residual stress portion S maintains the original plate thickness of the flange portion 21. For this reason, the magnetic flux flowing from the rotor is guided in the rotor rotation direction (circumferential direction) along the flange portion 21 at the inner edge of the anti-coil in the radial direction with respect to the compressive residual stress portion S. It can suppress more reliably that magnetic flux reaches a coil directly.
- the compressive residual stress portion S of the coil side edge 21a is inclined radially outward from the circumferential tip to the base toward the tooth portion 17, the magnetic flux flowing from the rotor can be comfortably applied to the tooth portion 17. Can lead.
- the magnetic resistance is increased by the generation of the space G.
- the space G has a wedge-shaped cross section that increases toward the coil side edge 21a, and increases the magnetic resistance between the coil side edges 21a. Also in this respect, the magnetic flux from the rotor can be more reliably suppressed from reaching the coil directly.
- FIG. 6 is a front view of the main part of the stator core according to the second embodiment.
- the basic configuration is the same as that of the first embodiment, and the same components are denoted by the same reference numerals, the corresponding components are denoted by A, and the duplicate description is omitted.
- the nonmagnetic part M was formed on the coil side 21a of the flange part 21.
- the non-magnetic part M is a so-called residual austenite phase in which a high-temperature stable phase in carbon steel remains at room temperature by rapid cooling, and is formed by gas carburizing and quenching after applying a carburizing inhibitor on the surface other than the intended location. did. Further, a solid carburizing agent was applied to the target portion and quenched in a non-oxidizing atmosphere.
- a solid carburizing agent after applying a solid carburizing agent to the target location or in a carburizing gas, it may be formed by high frequency induction heating or spot laser heating in which an induction heating coil is locally arranged in the target region.
- the structure in these carburizing and quenching, depending on the carburizing concentration, the structure can be transformed into a martensite phase and formed as a compressive residual stress portion S that receives a compressive force from the surroundings by phase transformation expansion of that portion. That is, the nonmagnetic (residual austenite phase) part M and the compressive residual stress part S may be mixed in the heel part by carburizing and quenching.
- the formation of the non-magnetic part M or the non-magnetic part M and the compressive residual stress part S can provide the same effects as those of the first embodiment.
- Carburizing and quenching can be performed for each stator core 13A or a laminated body.
- FIG. 7 is a front view of the stator core divided body.
- the basic configuration is the same as that of the first embodiment.
- the same components are denoted by the same reference numerals, the corresponding components are denoted by the same reference characters B, and redundant description is omitted.
- the stator core 13B of the stator 7B of the present embodiment was arranged in an annular shape by joining the stator core divided body 27.
- Each stator / core divided body 27 includes a yoke portion constituting portion 29 and a teeth portion 31, and has a laminated structure in which a plurality of electromagnetic steel sheets are formed by punching.
- the yoke portion constituting portion 29 is configured by dividing the annular yoke portion 15B at a predetermined interval in the circumferential direction.
- a plurality of stator core divided bodies 27 are joined in the circumferential direction to form an annular shape, and are attached to the motor case 8 with shrinkage by shrinkage or the like.
- the nonmagnetic portion M and the compressive residual stress portion (S) were formed in the flange portion 21 by carburizing and quenching in the same manner as in Example 2 as described above.
- the formation of the nonmagnetic part M or the compressive residual stress part (S) can provide the same operational effects as those of the first embodiment.
- Example 2 the processing of Example 2 was performed, or the same processing as in Example 2 was performed on Example 3, and then the compression processing of Example 1 was performed.
- the action of hardening by carburizing and quenching can form a wide range of compressive residual stress portions S having a value larger than those of Examples 1 to 3 and extending to the non-hardened portion or the non-compressed portion.
- the leakage of the magnetic flux which passes the collar part 21 and reaches a coil can be suppressed further.
- the nonmagnetic portion M, or the nonmagnetic portion M and the compressive residual stress portion S are formed on the entire edge along the coil side edge 21a of the flange portion 21, but the length direction of the coil side edge 21a It can also be formed partially, or can be formed on the entire flange 21.
- the coil side edge 21 a of the flange portion 21 can be formed in a shape that does not incline radially outward toward the teeth portion 17.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
[その他]
上記各実施例では、鍔部21のコイル側縁辺21aに沿って全縁部に非磁性部M、又は非磁性部M及び圧縮残留応力部Sを形成したが、コイル側縁辺21aの長さ方向に部分的に形成することもでき、鍔部21全体に形成することもできる。
15、15B ヨーク部
17、31 ティース部
21 鍔部
27 ステータ・コア分割体
29 ヨーク部構成部
S 圧縮残留応力部
M 非磁性部
Claims (7)
- 環状のヨーク部及びこのヨーク部の内周に径方向内側へ突出するティース部とを備えたモータのステータ・コアであって、
前記径方向内側へ突出したティース部の先端に、該ティース部に巻き付き形成されるコイルに対向し周方向に沿った鍔部を備え、
前記ティース部を積層構成する単板毎の鍔部に圧縮残留応力部又は非磁性部を有する、
ことを特徴とするステータ・コア。 - 請求項1記載のステータ・コアであって、
前記圧縮残留応力部は、前記鍔部の圧縮加工により形成した、ことを特徴とするステータ・コア。 - 請求項1または2記載のステータ・コアであって、
前記圧縮残留応力部又は非磁性部は、前記鍔部の浸炭焼き入れにより形成した、
ことを特徴とするステータ・コア。 - 請求項1~3の何れか1項記載のステータ・コアであって、
前記圧縮残留応力部又は非磁性部は、前記鍔部の浸炭焼き入れ後、圧縮加工により形成した、
ことを特徴とするステータ・コア。 - 請求項1~4の何れか1項記載のステータ・コアであって、
複数のヨーク部構成部に前記ティース部をそれぞれ備えたステータ・コア分割体を接合して環状に配置した、
ことを特徴とするステータ・コア。 - 請求項1~5の何れか1項記載のステータ・コアであって、
前記圧縮残留応力部又は非磁性部は、前記鍔部のコイル側縁辺側のみに沿って形成された、
ことを特徴とするステータ・コア。 - 請求項6記載のステータ・コアであって、
前記コイル側縁辺は、周方向の先端から基部へ前記ティース部へ向かって径方向外側へ傾斜している、
ことを特徴とするステータ・コア。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13749694.9A EP2816707A4 (en) | 2012-02-14 | 2013-02-14 | ENGINE STATOR CORE |
CN201380009153.6A CN104126265A (zh) | 2012-02-14 | 2013-02-14 | 马达的定子铁芯 |
US14/378,482 US20150001985A1 (en) | 2012-02-14 | 2013-02-14 | Stator core for motor |
KR1020147024013A KR101636463B1 (ko) | 2012-02-14 | 2013-02-14 | 모터의 스테이터 코어 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-029971 | 2012-02-14 | ||
JP2012029971 | 2012-02-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013121786A1 true WO2013121786A1 (ja) | 2013-08-22 |
Family
ID=48983917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/000812 WO2013121786A1 (ja) | 2012-02-14 | 2013-02-14 | モータのステータ・コア |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150001985A1 (ja) |
EP (1) | EP2816707A4 (ja) |
JP (1) | JPWO2013121786A1 (ja) |
KR (1) | KR101636463B1 (ja) |
CN (1) | CN104126265A (ja) |
WO (1) | WO2013121786A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015226395A (ja) * | 2014-05-28 | 2015-12-14 | 本田技研工業株式会社 | 回転電機のステータ |
JP2019047657A (ja) * | 2017-09-04 | 2019-03-22 | 富士電機株式会社 | 回転電機 |
JP2020010439A (ja) * | 2018-07-03 | 2020-01-16 | 富士電機株式会社 | 回転電機及びその製造方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09289745A (ja) * | 1996-04-19 | 1997-11-04 | Toyota Motor Corp | 回転機の磁極積層体 |
JP2004140966A (ja) * | 2002-10-21 | 2004-05-13 | Nissan Motor Co Ltd | 回転電機用コアの積層構造 |
JP2004208464A (ja) | 2002-12-26 | 2004-07-22 | Nissan Motor Co Ltd | 電動機の巻線構造 |
JP2005168153A (ja) * | 2003-12-02 | 2005-06-23 | Matsushita Electric Ind Co Ltd | モータ |
JP2009038904A (ja) | 2007-08-02 | 2009-02-19 | Sumitomo Electric Ind Ltd | ステータ |
JP2010114952A (ja) * | 2008-11-04 | 2010-05-20 | Mitsubishi Electric Corp | 電動機及び圧縮機及び送風機及び換気扇 |
JP2010220324A (ja) * | 2009-03-13 | 2010-09-30 | Mitsubishi Electric Corp | 電動機及び圧縮機及び空気調和機 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5527399A (en) * | 1993-08-30 | 1996-06-18 | The Arnold Engineering Company | Magnetic strips and methods for making the same |
-
2013
- 2013-02-14 US US14/378,482 patent/US20150001985A1/en not_active Abandoned
- 2013-02-14 JP JP2014500111A patent/JPWO2013121786A1/ja not_active Ceased
- 2013-02-14 KR KR1020147024013A patent/KR101636463B1/ko active IP Right Grant
- 2013-02-14 WO PCT/JP2013/000812 patent/WO2013121786A1/ja active Application Filing
- 2013-02-14 EP EP13749694.9A patent/EP2816707A4/en not_active Withdrawn
- 2013-02-14 CN CN201380009153.6A patent/CN104126265A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09289745A (ja) * | 1996-04-19 | 1997-11-04 | Toyota Motor Corp | 回転機の磁極積層体 |
JP2004140966A (ja) * | 2002-10-21 | 2004-05-13 | Nissan Motor Co Ltd | 回転電機用コアの積層構造 |
JP2004208464A (ja) | 2002-12-26 | 2004-07-22 | Nissan Motor Co Ltd | 電動機の巻線構造 |
JP2005168153A (ja) * | 2003-12-02 | 2005-06-23 | Matsushita Electric Ind Co Ltd | モータ |
JP2009038904A (ja) | 2007-08-02 | 2009-02-19 | Sumitomo Electric Ind Ltd | ステータ |
JP2010114952A (ja) * | 2008-11-04 | 2010-05-20 | Mitsubishi Electric Corp | 電動機及び圧縮機及び送風機及び換気扇 |
JP2010220324A (ja) * | 2009-03-13 | 2010-09-30 | Mitsubishi Electric Corp | 電動機及び圧縮機及び空気調和機 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2816707A4 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015226395A (ja) * | 2014-05-28 | 2015-12-14 | 本田技研工業株式会社 | 回転電機のステータ |
JP2019047657A (ja) * | 2017-09-04 | 2019-03-22 | 富士電機株式会社 | 回転電機 |
JP7000750B2 (ja) | 2017-09-04 | 2022-01-19 | 富士電機株式会社 | 回転電機 |
JP2020010439A (ja) * | 2018-07-03 | 2020-01-16 | 富士電機株式会社 | 回転電機及びその製造方法 |
JP7176254B2 (ja) | 2018-07-03 | 2022-11-22 | 富士電機株式会社 | 回転電機の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN104126265A (zh) | 2014-10-29 |
KR101636463B1 (ko) | 2016-07-05 |
KR20140128368A (ko) | 2014-11-05 |
EP2816707A4 (en) | 2016-04-27 |
JPWO2013121786A1 (ja) | 2015-05-11 |
EP2816707A1 (en) | 2014-12-24 |
US20150001985A1 (en) | 2015-01-01 |
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