WO2020053998A1 - Noyau de fer stratifié - Google Patents

Noyau de fer stratifié Download PDF

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Publication number
WO2020053998A1
WO2020053998A1 PCT/JP2018/033870 JP2018033870W WO2020053998A1 WO 2020053998 A1 WO2020053998 A1 WO 2020053998A1 JP 2018033870 W JP2018033870 W JP 2018033870W WO 2020053998 A1 WO2020053998 A1 WO 2020053998A1
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WO
WIPO (PCT)
Prior art keywords
core
diameter
core block
small
diameter core
Prior art date
Application number
PCT/JP2018/033870
Other languages
English (en)
Japanese (ja)
Inventor
友和 伊丸
Original Assignee
黒田精工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 黒田精工株式会社 filed Critical 黒田精工株式会社
Priority to PCT/JP2018/033870 priority Critical patent/WO2020053998A1/fr
Priority to JP2019500897A priority patent/JP6510157B1/ja
Priority to CN201880003899.9A priority patent/CN109952692B/zh
Publication of WO2020053998A1 publication Critical patent/WO2020053998A1/fr

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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
    • 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

Definitions

  • the present invention relates to a laminated core, and more particularly, to a laminated core used for a rotating electric machine or the like.
  • a laminated iron core used for a rotor or a stator of a rotating electric machine As a laminated iron core used for a rotor or a stator of a rotating electric machine, a plurality of iron core thin plates made of electromagnetic steel sheets or the like are stacked, and a welded portion extending continuously in the laminating direction on the outer peripheral surface of the plurality of iron core thin plates.
  • a laminated iron core having the plurality of iron core thin plates joined to each other by the welded portion is known (for example, Patent Documents 1 to 3).
  • a large-diameter core block formed by laminating a plurality of first iron core thin plates having a first outer diameter and joining them together, and a second core smaller than the first outer diameter.
  • a laminated iron core formed by laminating a plurality of second iron core thin plates having the outer diameters described above and laminating together a small-diameter core block formed by joining together.
  • the problem to be solved by the present invention is to improve the bonding strength between a large diameter core block and a small diameter core block in a laminated iron core having a large diameter core block and a small diameter core block.
  • a laminated core (10) is a large-diameter core block formed by laminating a plurality of first core thin plates (12) having a first outer diameter (D1) and bonding them together.
  • a small-diameter core formed by laminating a plurality of second iron core thin plates (16) having a second outer diameter (D2) smaller than the first outer diameter (D1) and joining them together;
  • a shoulder (14B) formed on a side of the large-diameter core block (14) facing the small-diameter core block (18).
  • a concave portion (28) is formed near the outer periphery of the small-diameter core block (18), and the concave portion (28) formed on the large-diameter core block (14) from the outer peripheral surface (18A) of the small-diameter core block (18). Lamination direction over the inner surface (28A) Connecting welds extending continuously (32) is provided.
  • the bonding strength between the large-diameter core block (14) and the small-diameter core block (18) is improved.
  • the recess (28) is defined by openings (30) formed in a plurality of continuous first core thin plates.
  • the degree of freedom in designing the concave portion (28) is high, and the concave portion (28) can be easily formed.
  • the large-diameter core block (14) is provided at each of both ends of the small-diameter core block (18), and the concave portion (28) and the connection welding portion (32) are provided. It is provided for each of both large-diameter core blocks (14).
  • the outer peripheral surface (18A) of the small-diameter core block (18) provided with the connection welding portion (32) and the inner surface (28A) of the concave portion (28) are provided. It is continuous along the lamination direction.
  • the concave portions (28) are provided at a plurality of locations along the circumferential direction of the large-diameter core block (14).
  • the coupling strength between the large-diameter core block (14) and the small-diameter core block (18) is uniformly improved over the entire area in the circumferential direction.
  • the laminated core (10) preferably has a large-diameter core block welded portion (22) extending continuously from the outer peripheral surfaces of the plurality of first core thin plates (12) in the laminating direction and the plurality of first core thin plates (12).
  • a small-diameter core block weld (26) extends continuously in the laminating direction on the outer peripheral surface of the second iron core sheet (16).
  • connection welding portion (32) is provided so as to form an extension of the small-diameter core block welding portion (26).
  • the number of steps for positioning the laminated core (10) or the welding head in the circumferential direction of the laminated core (10) during the welding process of each part is reduced, and the production efficiency of the laminated core (10) is improved.
  • the large-diameter core block weld (22) and the small-diameter core block weld (26) are provided at positions that are circumferentially aligned with each other.
  • the number of steps for positioning the laminated core (10) or the welding head in the circumferential direction of the laminated core (10) during the welding process of each part is reduced, and the production efficiency of the laminated core (10) is improved.
  • the first core thin plate (12) or the second core thin plate (16) are connected to each other by an adhesive (36).
  • the large-diameter core block (14) and / or the small-diameter core block (18) can be handled as a pre-blocked sub-assembly part, and the production efficiency of the laminated core (10) is improved.
  • the first core thin plate (12) or the second core thin plate (16) are connected to each other by swaging (38).
  • the large-diameter core block (14) and / or the small-diameter core block (18) can be handled as a pre-blocked sub-assembly part, and the production efficiency of the laminated core (10) is improved.
  • the laminated core according to the present invention a sufficient bonding strength between the large-diameter core block and the small-diameter core block can be obtained.
  • 1 is a perspective view showing a state before welding of one embodiment of a laminated iron core according to the present invention. Partial sectional perspective view showing a main part of the laminated core according to the present embodiment. Longitudinal sectional view showing a main part of the laminated core according to the present embodiment.
  • the top view of the 1st iron core thin plate without opening of the laminated core by this embodiment Plan view of a first iron core thin plate with openings in a laminated iron core according to the present embodiment
  • the laminated iron core 10 is used for a fixed iron core (stator core) of a rotating electric machine such as an electric motor or a generator, and as shown in FIG. 1, press punching having a first outer diameter D1.
  • a small-diameter core block 18 formed by stacking a plurality of second iron core thin plates 16 formed of a press-punched product having a second outer diameter D2 smaller than the first outer diameter D1 and bonding them together.
  • the large-diameter core block 14 is provided at each of the axial ends of the small-diameter core block 18.
  • the laminated iron core 10 has a constriction formed by laminating the lower large-diameter core block 14, the small-diameter core block 18, and the upper large-diameter core block 14 in order from the bottom.
  • the first iron core thin plate 12 and the second iron core thin plate 16 are each formed of a flat plate made of an electromagnetic steel plate or the like, and have annular main parts 12A, 16A and a main part. It has a plurality of magnetic pole teeth 12B, 16B extending from the parts 12A, 16A toward the center, and are all laminated concentrically.
  • the inner diameters of the first iron core thin plate 12 and the second iron core thin plate 16 obtained by assembling the tips of the plurality of magnetic pole teeth 12B and 16B are the same.
  • each large-diameter core block 14 has a first core for a first core adjacent to each other by a large-diameter core block welded portion 22 in which a linear welding bead is formed in a welding groove 20.
  • the thin plates 12 are joined to each other, and the whole is integrated.
  • Each large-diameter core block weld 22 may be formed by laser welding.
  • a weld bead is formed by melting the first iron core thin plate 12 itself.
  • each welding groove 20 has a substantially W-shape having a ridge 20A for forming a welding bead at the center in the groove width direction in plan view before welding.
  • the groove defining surface of each welding groove 20 includes the surface of the ridge 20A before welding.
  • Each large diameter core block weld 22 forms a sound weld in which an appropriate weld bead is formed by melting of the ridge 20A.
  • each large-diameter core block 14 is a linear large-diameter core block weld that extends continuously from the outer peripheral surfaces of the plurality of first core thin plates 12 in the laminating direction of the first core thin plates 12.
  • the first iron core thin plates 12 adjacent to each other are joined together by the portion 22, so that the whole is integrated.
  • a plurality of welding grooves 24 extending linearly in the laminating direction of the second iron core thin plate 16 are formed on the outer peripheral surface 18 ⁇ / b> A of the small-diameter core block 18 at equal intervals in the circumferential direction. Is formed.
  • the groove defining surface (the inner surface of the groove) including the bottom surface of each welding groove 24 forms a part of the outer peripheral surface 18 ⁇ / b> A of the small-diameter core block 18.
  • the second iron core thin plates 16 adjacent to each other are joined to each other by a small-diameter core block welded portion 26 in which a linear welding bead is formed in a welding groove 24, and the whole is integrated.
  • Each of the small-diameter core block welds 26 may be formed by laser welding.
  • a weld bead is formed by melting the second iron core thin plate 16 itself.
  • the welding groove 24 has a substantially W shape having a ridge 24A for forming a welding bead at the center in the groove width direction in a plan view before welding.
  • the groove defining surface of each welding groove 24 includes the surface of the ridge 24A before welding.
  • Each small-diameter core block weld 26 forms a sound flat weld in which an appropriate weld bead is formed by melting the ridge 24A.
  • the small-diameter core block 18 is formed by a linear small-diameter core block welded portion 26 that continuously extends the outer peripheral surfaces of the plurality of second core thin plates 16 in the stacking direction of the second core thin plates 16.
  • the second iron core thin plates 16 adjacent to each other are joined to each other to be integrated as a whole.
  • the welding groove 20 and the large-diameter core block welded portion 22 and the welding groove 24 and the small-diameter core block welded portion 26 are provided at positions aligned with each other in the circumferential direction.
  • the large-diameter core block welded portion 22 and the small-diameter core block welded portion 26 are in the laminating direction of the first iron core thin plate 12 and the second iron core thin plate 16 (the generatrix direction of the large-diameter core block 14 and the small-diameter core block 18). ) Extends in a straight line.
  • a recess 28 is formed near the outer periphery of the small-diameter core block 18 on the shoulder surface 14B formed on the side facing the small-diameter core block 18 of each of the large-diameter core blocks 14 in the upper and lower stages.
  • the concave portion 28 is formed on both the upward shoulder surface 14B located on the lower end side of the small-diameter core block 18 and the downward shoulder surface 14B located on the upper end side of the small-diameter core block 18 along the circumferential direction of the large-diameter core block 14.
  • a plurality of recesses 28 are provided at equal intervals, and each recess 28 is provided at a position that is aligned with the welding grooves 20 and 24 in the circumferential direction.
  • Each of the recesses 28 has an opening (through hole) formed by pressing a plurality of continuous first core thin plates 12 including the first core thin plate 12 adjacent to the second core thin plate 16. ) 30 are defined.
  • the first iron core thin plate 12 does not have the opening 30 in the main part 12A, and as shown in FIG. And a plurality of continuous sheets including the one adjacent to the second iron core thin plate 16 are provided with the openings shown in FIG. Are constructed without the opening shown in FIG. Thereby, each recess 28 forms a pit with a bottom.
  • Each recess 28 has a substantially trapezoidal shape having an upper bottom at the center side of the small-diameter core block 18 in a plan view.
  • the inner surface 28A on the center side (upper bottom side) of the concave portion 28 has a substantially W shape having a ridge 28B for forming a weld bead at the center in the groove width direction in plan view.
  • the outer peripheral surface 18A specifically, the bottom surface of the welding groove 24 which substantially forms a part of the outer peripheral surface 18A, is continuous in the laminating direction.
  • the inner surface 28A of each recess 28 and the corresponding bottom surface of the welding groove 24 are flush with each other.
  • the ridge 28B of each recess 28 is located at a position circumferentially aligned with the ridge 20A of the corresponding welding groove 20 and the ridge 24A of the welding groove 24.
  • Each of the recesses 28 is set to have a size and a shape such that a welding head (not shown) can enter a deep portion of the recess 28 from above or below the recess 28 for a connection welding portion 32 described later. . Since the recess 28 is formed by the opening 30 of the first iron core thin plate 12 formed by press punching, it is easily formed by press working. The size and shape of the concave portion 28 are set with a high degree of design freedom by the shape of the opening 30.
  • a linear connection welding portion 32 extending continuously in the laminating direction is provided.
  • Each connection welding portion 32 joins the adjacent first core thin plates 12, the adjacent first core thin plate 12, the second core thin plate 16, and the adjacent second core thin plate 16. .
  • each connection welding portion 32 joins each large-diameter core block 14 and each small-diameter core block 18.
  • Each connection welding portion 32 may be formed by laser welding.
  • the welding bead is formed by melting the first core sheet 12 and the second core sheet 16 themselves.
  • the inner surface 28A of the recess 28 also has a ridge 20A for forming a weld bead at the center in the groove width direction in a plan view before welding, similarly to the welding groove 24, as described above. It is shaped like a letter.
  • each connection welding portion 32 forms a sound flat welding portion in which an appropriate welding bead is formed by melting the ridges 24A and 28B.
  • each connection weld 32 is provided so as to form an extension in line with the corresponding small-diameter core block weld 26.
  • each connection welding portion 32 includes a portion R1 (see FIG. 3) that overlaps with the corresponding small-diameter core block welding portion 26.
  • connection welding portion 32 extending continuously in the laminating direction from the groove bottom surface of each welding groove 24 to the inner surface 28A of the corresponding concave portion 28. That is, since the connection welding portions 32 extending over the large-diameter core blocks 14 and the small-diameter core blocks 18 are provided, each large-diameter core block is compared with a case where there is no connection welding portion 32. The bonding strength between the core 14 and the small-diameter core block 18 is improved.
  • each connection welding portion 32 has a portion R2 extending to the inner surface 28A of the concave portion 28, the first iron core sheet 12 corresponding to this portion R2 is formed by the large-diameter core block welding portion 22 and the connection welding portion 32. Joined by both. As a result, the joining strength between the first iron core thin plates 12 located at the boundary with the small-diameter core block 18 and the vicinity thereof is improved, and the welding line of the first iron core thin plate 12 and the second iron core thin plate Since the 16 welding lines are not interrupted when viewed in the laminating direction, the welding strength of the entire laminated iron core 10 is improved.
  • each connection welding portion 32 is provided so as to form an extension of the corresponding small-diameter core block welding portion 26, and further, each large-diameter core block welding portion 22 corresponds.
  • the circumferential direction of the laminated iron core 10 or the welding head of the laminated iron core 10 during the welding process of each part is smaller than in the case where they are not aligned. The number of steps of the positioning operation is reduced, and the production efficiency of the laminated core 10 is improved.
  • the connection welding portion 32 is formed. There is no step in the middle of the welding, and the welding strength is improved. Since the plurality of concave portions 28 and the connection welding portions 32 are provided at equal intervals along the circumferential direction of the large-diameter core block 14, the coupling strength between the large-diameter core block 14 and the small-diameter core block 18 is increased over the entire circumferential direction. To be uniformly improved.
  • the concave portion 28 is defined by the openings 30 formed in the plurality of continuous thin plates 12 of the first iron core, so that the degree of freedom in designing the concave portion 28 is high.
  • the depth of the recess 28 can be set by the number of the iron core thin plates 12 having the openings 30.
  • the joining of the first core thin plate 12 and the second core thin plate 16 including the connection welding portion 32 is entirely performed by welding, the production efficiency is improved and the welding is performed. Since no joining equipment other than the equipment is required, the equipment cost for manufacturing the laminated core 10 is reduced.
  • the first core thin plate 12 and the second core thin plate 16 adjacent to each other are arranged as shown in FIG. As shown, each is connected by an adhesive 36, or, as shown in FIG. 8, each is connected by a caulking portion 38.
  • connection welding portion 32 is provided, and the large-diameter core block welding portion 22 and the small-diameter core block welding portion 26 are joined by the connection welding portion 32.
  • the large-diameter core block weld 22 and the small-diameter core block weld 26 may be omitted, but the large-diameter core block weld 22 is shown by phantom lines in FIGS. It may be provided as described.
  • the large-diameter core block 14 is bonded by the large-diameter core block welded portion 22 in addition to the bonding by the adhesive 36 or the bonding by the caulking portion 38, and the bonding strength is improved.
  • the coupling strength between the large-diameter core block 14 and the small-diameter core block 18 is improved, and the large-diameter core block 14 and the small-diameter core block 18 are previously blocked. Since it can be handled as an assembly part, the production efficiency of the laminated core 10 is improved.
  • the shapes of the welding grooves 20 and 24 before welding are not limited to a substantially W shape in plan view, and may be other shapes suitable for the welding method.
  • the welding grooves 20 and 24 do not necessarily need to be provided at equal intervals in the circumferential direction of the large-diameter core block 14 and the small-diameter core block 18, and may be provided at irregular intervals in the same circumferential direction.
  • the welding grooves 20, 24 are not essential and may be omitted.
  • the outer peripheral surface 14A of the large diameter core block 14 includes the bottom surface of the welding groove
  • the outer peripheral surface 18A of the small diameter core block 18 includes the bottom surface of the welding groove 24.
  • the large-diameter core block welding portion 22 and the small-diameter core block welding portion 26 do not necessarily need to extend in a straight line in the laminating direction of the first iron core sheet 12 and the second iron core sheet 16.
  • the diameter core block 14 and the small diameter core block 18 may be provided at different positions in the circumferential direction.
  • the shape of the concave portion 28 in plan view is not limited to a substantially trapezoidal shape, and may be a rectangle, a semicircle, a triangle, or the like, depending on welding conditions, peripheral shape, and the like.
  • the recess 28 may be formed by a notch opened in the outer peripheral surface 14 ⁇ / b> A of the large-diameter core block 14.
  • the welding of each welding portion is not limited to laser welding, and may be electron beam welding, plasma arc welding, or the like.
  • the lamination and connection of the large-diameter core block 14 and the small-diameter core block 18 may be performed in a progressive die for press-forming the first core sheet 12 and the second core sheet 16, even if the first core sheet is pressed.
  • the pressing may be performed outside the mold after the press forming of the thin sheet for steel 12 and the second thin sheet for iron core 16.
  • the laminated core 10 is not limited to an iron core used for a stator of a rotating electric machine, but can be applied to an iron core (rotor core) of a rotor.
  • the concave portion 28 is formed near the inner periphery of the small-diameter core block on the shoulder surface formed on the side of the large-diameter core block facing the small-diameter core block.
  • Laminated iron core 12 First iron core thin plate 12A: Main part 12B: Magnetic pole teeth 14: Large diameter core block 14A: Outer peripheral surface 14B: Shoulder surface 16: Second iron core thin plate 16A: Main part 16B: Magnetic pole teeth 18: Small-diameter core block 18A: Outer peripheral surface 20: Weld groove 20A: Ridge 22: Large-diameter core block weld 24: Weld groove 24A: Ridge 26: Small-diameter core block weld 28: Recess 28A: Inner surface 28B: Ridge 30: Opening 32: Connection welding portion 36: Adhesive 38: Caulked portion D1: First outer diameter D2: Second outer diameter R1: Overlapping portion R2: Extending portion

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Le problème décrit par la présente invention est d'améliorer, dans un noyau de fer stratifié doté d'un bloc central de grand diamètre et d'un bloc central de petit diamètre, la résistance de liaison entre les blocs centraux de grand diamètre et de petit diamètre. La solution selon l'invention porte sur un noyau de fer stratifié (10) qui est configuré par stratification : d'un bloc central de grand diamètre (14) formé par stratification d'une pluralité de premières plaques minces de noyau de fer (12) ayant un premier diamètre externe (D1) ; et d'un bloc de noyau de petit diamètre (18) formé par stratification d'une pluralité de secondes plaques minces de noyau de fer (16) ayant un second diamètre externe (D2) qui est plus petit que le premier diamètre externe (D1), une partie évidée (28) étant formée dans une surface d'épaulement (14B) formée sur un côté faisant face au bloc central de petit diamètre (18) du bloc central de grand diamètre (14) à proximité de la périphérie externe du bloc central de petit diamètre (18), et une partie soudure de liaison (32) s'étendant en continu dans une direction de stratification étant formée depuis une surface périphérique externe du bloc central de petit diamètre (18) à une surface interne (28A) de la partie évidée (28) formée dans le bloc central de grand diamètre (14).
PCT/JP2018/033870 2018-09-12 2018-09-12 Noyau de fer stratifié WO2020053998A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2018/033870 WO2020053998A1 (fr) 2018-09-12 2018-09-12 Noyau de fer stratifié
JP2019500897A JP6510157B1 (ja) 2018-09-12 2018-09-12 積層鉄心
CN201880003899.9A CN109952692B (zh) 2018-09-12 2018-09-12 层叠铁芯

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/033870 WO2020053998A1 (fr) 2018-09-12 2018-09-12 Noyau de fer stratifié

Publications (1)

Publication Number Publication Date
WO2020053998A1 true WO2020053998A1 (fr) 2020-03-19

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JP (1) JP6510157B1 (fr)
CN (1) CN109952692B (fr)
WO (1) WO2020053998A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257246U (fr) * 1988-10-19 1990-04-25
JP2012161126A (ja) * 2011-01-31 2012-08-23 Panasonic Corp 電動機、圧縮機、機器
JP2013031311A (ja) * 2011-07-29 2013-02-07 Daikin Ind Ltd ステータ及びその製造方法
JP2016046866A (ja) * 2014-08-20 2016-04-04 オークマ株式会社 電動機の固定子

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB764656A (en) * 1954-03-02 1956-12-28 Gen Motors Corp Improvements in and relating to welded laminated stator assemblies
JP5299514B2 (ja) * 2010-03-15 2013-09-25 トヨタ自動車株式会社 ロータおよびその製造方法
CN207382073U (zh) * 2017-06-29 2018-05-18 中车株洲电力机车研究所有限公司 一种定子铁心的固定结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257246U (fr) * 1988-10-19 1990-04-25
JP2012161126A (ja) * 2011-01-31 2012-08-23 Panasonic Corp 電動機、圧縮機、機器
JP2013031311A (ja) * 2011-07-29 2013-02-07 Daikin Ind Ltd ステータ及びその製造方法
JP2016046866A (ja) * 2014-08-20 2016-04-04 オークマ株式会社 電動機の固定子

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CN109952692A (zh) 2019-06-28
JP6510157B1 (ja) 2019-05-08
CN109952692B (zh) 2020-02-21
JPWO2020053998A1 (ja) 2020-10-22

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