WO2017187522A1 - Stator, moteur électrique, procédés de fabrication de stator et de moteur électrique - Google Patents

Stator, moteur électrique, procédés de fabrication de stator et de moteur électrique Download PDF

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Publication number
WO2017187522A1
WO2017187522A1 PCT/JP2016/063088 JP2016063088W WO2017187522A1 WO 2017187522 A1 WO2017187522 A1 WO 2017187522A1 JP 2016063088 W JP2016063088 W JP 2016063088W WO 2017187522 A1 WO2017187522 A1 WO 2017187522A1
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WO
WIPO (PCT)
Prior art keywords
core back
winding
core
teeth
stator
Prior art date
Application number
PCT/JP2016/063088
Other languages
English (en)
Japanese (ja)
Inventor
康友 生方
治之 長谷川
丈典 馬場
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/063088 priority Critical patent/WO2017187522A1/fr
Priority to JP2016567279A priority patent/JP6207769B1/ja
Priority to TW105127863A priority patent/TWI620398B/zh
Publication of WO2017187522A1 publication Critical patent/WO2017187522A1/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
    • 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
    • H02K15/08—Forming windings by laying conductors into or around core parts
    • H02K15/095—Forming windings by laying conductors into or around core parts by laying conductors around salient poles

Definitions

  • the present invention relates to a stator, an electric motor, a method for manufacturing a stator, and a method for manufacturing an electric motor, and more particularly to mounting of a coil on a stator.
  • a stator of an electric motor usually includes a core core, a teeth portion, a stator core having a slot surrounded by the core back portion and the teeth portion, and a coil wound separately around the teeth portion.
  • the core back portion is also called a yoke portion and refers to a wide portion outside the teeth portion around which the coil is wound.
  • An undercut part is an area
  • a conventional general winding method is a nozzle winding method in which winding is performed while a winding nozzle rotates around the stator core, and this nozzle winding method is fast and simple. Can be wound. However, the undercut portion cannot be wound, and it has been difficult to improve the coil space factor of the winding.
  • the teeth part and the outer peripheral part are joined in an L shape via a thin part.
  • a technique is disclosed in which a plurality of the above-mentioned components are combined in a ring shape to obtain a stator that can be easily mounted with a winding on a tooth portion.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a stator having a high winding space factor and easy to manufacture.
  • the stator according to the present invention has a tooth portion around which a winding is wound, and one end portion connected to the tooth portion via a thin connection portion, A plurality of split iron cores having a core back portion constituting a magnetic path are provided.
  • the teeth part and the core back part can contact each other with a thin connection part arranged between the teeth part and the core back part as a fulcrum, and the teeth part and the core back part form an acute angle at the contact part.
  • a stator having a high winding space factor and easy to manufacture can be obtained.
  • Sectional drawing which shows the split iron core of the stator for electric motors of Embodiment 1
  • Sectional drawing which shows the state before mounting
  • wearing with the winding of the split iron core of the stator of FIG. (A) to (c) are enlarged views of the main part of the split core of the stator according to the first embodiment, (a) is a cross-sectional view, (b) is a cross-sectional view along IIIb-IIIb in (a), (C) is a sectional view taken along line IIIc-IIIc in (a).
  • Explanatory drawing which shows the electric motor using the stator of Embodiment 1.
  • Process sectional drawing which shows the manufacturing process of the stator of Embodiment 1
  • Process sectional drawing which shows the manufacturing process of the stator of Embodiment 1
  • Process sectional drawing which shows the manufacturing process of the stator of Embodiment 1
  • Process sectional drawing which shows the manufacturing process of the stator of Embodiment 1
  • the perspective view of the stator of Embodiment 1 The flowchart which shows the manufacturing process of the stator of Embodiment 1.
  • Sectional drawing which shows the split iron core of the stator of Embodiment 2.
  • Sectional drawing which shows the split iron core of the stator of Embodiment 3
  • Sectional drawing which shows the split iron core of the stator of Embodiment 4.
  • Sectional drawing which shows the electric motor using the stator of Embodiment 4.
  • Sectional drawing which shows the split iron core of the stator of Embodiment 5
  • Sectional drawing which shows the electric motor using the stator of Embodiment 5.
  • FIG. 1 is a cross-sectional view showing a split iron core of a stator for an electric motor according to Embodiment 1.
  • FIG. 2 is a cross-sectional view showing a state before the winding of the split core of the stator of FIG. 1 is mounted.
  • 3 (a) to 3 (c) are enlarged views of the main part of the split core of the stator according to the first embodiment.
  • FIG. 3 (a) is a cross-sectional view
  • FIG. FIG. 3C is a sectional view taken along line IIIc-IIIc in FIG.
  • FIG. 4 is an explanatory view showing an electric motor using the stator of the first embodiment.
  • the stator of the motor of the first embodiment is one characterized by the configuration of the split core 10 d.
  • the split iron core 10 d constituting the stator includes core connection portions 3 a and 3 b and a tooth portion 5 that are connected to each other with the thin connection portions 1 a and 1 b and the grooves 2 a and 2 b interposed therebetween.
  • a winding 6 is wound and fixed on the tooth portion 5.
  • the teeth part 5 and the core back parts 3a and 3b can be opened or closed by opening and closing the grooves 2a and 2b in which the thin connection parts 1a and 1b are formed.
  • the teeth portion and the core back portion can be rotated and contacted with the thin wall connecting portions 1a and 1b arranged between the teeth portion 5 and the core back portions 3a and 3b as fulcrums.
  • the part makes an acute angle at the contact part.
  • the stator core 10 d has the teeth portion 5 and the core back portions 3 a and 3 b in contact with each other in the closed state, and the center of the teeth portion that is the center line of the teeth portion 5.
  • An angle ⁇ c formed by the line 5 o and the core back part center line 3 o which is the center line of the core back parts 3a and 3b is a right angle.
  • the angle ⁇ c formed with the core back part center line 3 o is precisely the angle formed between the teeth part center line 5 o and the tangent line of the core back part center line 3 o at the intersection.
  • the core back portions 3a and 3b are in a closed state, and there are no two grooves 2a and 2b.
  • the two thin connection portions 1a and 1b are absorbed by the notches 1s.
  • the angle ⁇ co formed by the core back portions 3 a, 3 b and the teeth portion 5 in the core back portions 3 a, 3 b and the tooth portion 5 is an acute angle and forms the undercut portions 4 a, 4 b.
  • the angle ⁇ co formed by the core back portions 3a, 3b and the tooth portion 5 at the contact portion between the core back portions 3a, 3b and the tooth portion 5 is the inner angle of the core back portions 3a, 3b at the inner edge of the contact portion.
  • the angle formed between the circumference and the side of the teeth portion 5 shall be said.
  • the angle formed between the tangent line at the inner edge as a contact point and the side of the teeth portion 5 is determined between the core back portions 3a and 3b and the teeth portion 5.
  • the formed angle ⁇ co is assumed.
  • the tooth portion 5 and the core-back portion 3a, 3b is formed between the tooth portion centerline 5 o and the core-back centerline 3 o
  • the angle ⁇ o forms an obtuse angle. That is, the angle formed between the core back portions 3a and 3b and the tooth portion 5 is an obtuse angle.
  • the notch 1s is an escape portion at the time of folding, and becomes a surplus absorption region at the time of folding.
  • 3 (a) to FIG. 3 (c) are enlarged views of main parts around the thin connection portions 1a and 1b in the open state. As shown in FIG.
  • the teeth portion 5 and the core back portions 3a and 3b are separated by grooves 2a and 2b as a whole, but a part is shown in FIG. 3B.
  • a connecting portion composed of the thin-walled connecting portions 1a and 1b is formed and connected.
  • the depth of the grooves 2a and 2b that is, the connecting width of the connecting portion and the thickness of the thin connecting portions 1a and 1b are determined in consideration of satisfying both the connecting strength and the ease of bending.
  • 3 (b) and 3 (c) only the boundary between the tooth portion 5 and the core back portion 3a is shown, but the thin-walled connecting portions 1a, 1b and the grooves 2a, 2b are formed in the teeth portion center line 5 O.
  • the connection strength and the ease of folding are equal on both sides.
  • the electric motor 100 constitutes a stator 10 by connecting a plurality of T-shaped split cores 10 d including core back portions 3 a and 3 b and a tooth portion 5 to form a cylindrical shape.
  • the rotor 20 is arranged at the center surrounded by the stator.
  • the split core 10 d is formed by stacking a plurality of split core structures made of electromagnetic steel plates.
  • the winding 6 is wound around the tooth portion 5 of each divided core 10 d constituting the stator core via an insulating member (not shown).
  • the axial direction of the tooth portion 5 of the divided iron core 10 d that is, the both end portions in the direction of the tooth center line 5 O and the side wall portions are covered with a non-expandable insulating member formed of insulating paper or insulating coating.
  • the winding 6 is wound around the tooth portion 5 from above the insulating member.
  • FIG. 4 is a view showing an electric motor having a cylindrical stator core.
  • a frame (not shown) is attached to the outside of the cylindrical stator core in the radial direction, and an electric motor including the stator core is formed.
  • FIG. 5 to 7 are process cross-sectional views showing the manufacturing process of the stator according to the first embodiment
  • FIG. 8 is a perspective view of the stator according to the first embodiment
  • FIG. 9 is a perspective view of the stator according to the first embodiment.
  • It is a flowchart which shows a manufacturing process.
  • a divided core structure in which an angle ⁇ o formed with the line 3 o forms an obtuse angle is formed.
  • step S102 of laminating the core it assembled the division core structure obtained by thin punching, to form the segment core 10 d. Thereafter, the assembled divided core 10 d is subjected to an insulation treatment between the ground. As the insulating treatment is processed to be attached to portions corresponding to both ends of the shaft i.e. the tooth centerline 5 o direction of the split core 10 d and the insulating member.
  • a process of applying an insulating coating to the entire divided core 10 d or a process of attaching an insulating paper as an insulating member to the side surface of the divided core 10 d can be cited as the insulating process.
  • two or more of the plurality of processes described above may be combined to form an insulation process.
  • the coil is mounted over the entire width of the teeth portion 5 as a coil.
  • the surface of the winding 6 is insulated by forming a coating made of a copper wire with an insulating material coating, in this embodiment, an enamel coating.
  • the conducting wire constituting the winding 6 is not limited to copper, but may be a conducting wire constituted by a conductor.
  • FIG. 8 is a perspective view of the split iron core 10 d in which the winding 6 is wound and closed.
  • the split iron core 10 d has a shape in which the core back portions 3 a and 3 b are in close contact with the tooth portion 5 to form a magnetic path desirable for incorporation into the electric motor 100.
  • an arrow A indicates the stacking direction of the divided cores.
  • the divided cores 10 d thus obtained are fixed by welding nine adjacent core back portions 3a, 3b to form a cylindrical shape as shown in FIG.
  • the motor 100 is obtained by mounting components such as the rotor 20.
  • the coil in the open state, at the contact portion between the core back portions 3a and 3b and the tooth portion 5, the coil turns in any of the split iron cores make an obtuse angle with respect to the tooth portion.
  • the winding can be mounted by a general winding method.
  • the winding can be carried out with good workability in a form that matches the shape of the undercut portion that is formed when the iron core is bent later.
  • the space factor can be improved by arranging a coil in the undercut portion of the split iron core.
  • the split iron core is molded so that the angle formed between the core back portion and the teeth portion is an obtuse angle in a form in which a thin connection portion and a groove are provided in the core back portion.
  • the open teeth portion, thin connection portion, and core back portion are formed at an angle that can be wound by the winding, so that the thickness of the thin connection portion can be reduced, so that a gap is generated when bent. Can be suppressed.
  • two or more thin connection portions may be disposed in one groove. By providing thin connection portions at both ends of the groove, the flatness can be maintained by bending the inner side and the outer side of the divided core.
  • the core back part is formed in the desired shape by bending the thin connection part of the split core, but the amount of deformation due to bending can be minimized, so cracking of the thin connection part Hard to occur. Therefore, it is not necessary to use a high-strength material as the split core material, and it is possible to suppress breakage during bending or biting of foreign matter. It is also effective in improving efficiency.
  • the split iron core is molded by press working, but may be manufactured by a method such as wire cutting or cutting with a laser cutter.
  • FIG. FIG. 10 is a cross-sectional view showing a split core of the stator according to the second embodiment.
  • the thin connection portions 1a and 1b are formed in directions extending from each other at an acute angle from the notch 1s.
  • the thin connection portions 11a and 11b are separated by two. An example provided will be described.
  • the notch 11s constitutes an escape portion during bending, similar to the notch 1s of the first embodiment.
  • Segment core 10 d constituting the stator of the motor of the second embodiment, the thin-walled connecting section 11a spaced from each other, 11b and connected across the groove 12a, a 12b, the core back portion 13a, 13b And a teeth portion 15.
  • a winding (not shown) is wound and fixed on the tooth portion 15.
  • the teeth part 15 and the core back parts 13a and 13b can be opened and closed by opening and closing the thin connection parts 11a and 11b, as in the first embodiment.
  • the split core 10 d of the stator of the second embodiment is the same as that of the first embodiment, and the tooth portion 15 and the core back portions 13a and 13b come into contact with each other, and the tooth portion center line 5 O and the core back
  • the angle formed by the part center line 3 O forms an acute angle.
  • the amount of core back deformation after winding can be reduced compared to the thin connecting portion of the first embodiment. Further, when three or more thin connection portions and groove portions are provided in the core back portion, the deformation amount per one can be further suppressed.
  • Embodiment 3 In the first embodiment, the insulation treatment of the divided iron core 10 d is performed after winding, but in the third embodiment, a divided bobbin in which a slit 7 s is inserted between the core back portions 3 a and 3 b and the tooth portion 5.
  • the bobbin can be attached before winding.
  • FIG. 11 in which the split iron core is in the open state, the teeth portion 5 and the core back portions 3a and 3b are attached to each other, and in the closed state, the core back bobbins 7a1 and 7a2 and the teeth bobbins 7b1 and 7b2 that are in contact with each other Is the one that is attached.
  • Others are the same as the split iron core of Embodiment 1.
  • the split iron core of the stator of the electric motor according to the third embodiment in addition to the effect obtained by the split iron core according to the first embodiment, it is not necessary to perform insulation treatment after winding, so that the number of manufacturing steps can be reduced.
  • the insulating component is not limited to the bobbin, and a molded body made of an insulating thin film such as a slot cell may be used.
  • FIG. Segment core 10 d of the first embodiment are formed separately, after winding, and the thin connection part in the closed state, by fixing by nine sequences has formed the stator, embodiment 4 Then, it forms in the state which connected 10 s of division
  • the divided iron core portion 10 s includes the thin-wall connecting portions 1 a and 1 b and the core back portions 3 a and 3 b and the tooth portion 5 that are connected with the grooves 2 a and 2 b interposed therebetween. A winding is wound around the tooth portion 5.
  • the teeth part 5 and the core back parts 3a and 3b can be opened and closed by opening and closing the thin connection parts 1a and 1b.
  • the core back portions 3a and 3b have their outer edges in a straight line in the open state, but the thin core connection portions 1a and 1b and the grooves 2a and 2b are sandwiched between the individual divided core portions 10S.
  • the core back portions 3a and 3b have their outer edges in a straight line in the open state, but the thin core connection portions 1a and 1b and the grooves 2a and 2b are sandwiched between the individual divided core portions 10S.
  • it has the same shape as that of the first embodiment.
  • the adjacent core back portions 3a and 3b are continuously formed and the nine divided core portions 10s are continuously formed on one straight line, they are the same as in the first embodiment. Omitted.
  • the teeth portion 5 and the core back portions 3a and 3b are obtuse angles that are about 5 to 10 degrees larger than the right angle in the open state, and thus can be easily wound.
  • the windings 6 may be mounted by warping the grooves 2a and 2b to be further expanded. Then, by closing the nine divided iron core portions 10s in the connected state after the winding is mounted, the stator 10 having an annular iron core as shown in FIG. 13 is formed. After that, as in the first embodiment, the same electric motor as in the first embodiment can be obtained by mounting the rotor 20.
  • the split core portion can be formed in a lump, not only the assembly workability is greatly improved, but the split core portion is formed so that the outer edge of the core back portion is generally on a straight line.
  • the connecting portion is unnecessary, the divided core material can be greatly saved.
  • a magnetic path is formed as designed.
  • FIG. FIG. 14 is a cross-sectional view showing a split core of the stator according to the fifth embodiment
  • FIG. 15 is a cross-sectional view showing an electric motor 100S using the stator according to the fifth embodiment.
  • it formed in the state which connected 10 s of division
  • the iron core is made into a number of connecting structures so that the outer edge of the teeth portion 5 is positioned in a straight line in the open state and the teeth portion 5 in the closed state. It is comprised so that the outer edge of may become a state close
  • the magnetic characteristics of the iron core configured by the connection structure of the divided core portion 10s is compared with the stator of the fourth embodiment. Further improvement can be achieved. Further, the waste of the iron core material can be reduced, and the iron core material can be further saved.
  • the teeth portion and the core back portion are configured to have an obtuse angle between the teeth portion and the core back portion in the contact portion in the open state and an acute angle in the closed state. It is desirable that the angle at the time of displacement from the state to the closed state is as small as possible. Therefore, in an open state, it is desirable that the teeth portion and the core back portion have an obtuse angle that is about 5 to 10 degrees larger than a right angle. By adopting such a configuration, it is possible to obtain a stator in which the coil can be easily wound and the strength of the thin connecting portion is small.
  • the laminated structure is formed by laminating the divided core structure or the iron core structure obtained by connecting the divided core structures.
  • a single-layer structure is used without taking a laminated structure. It may be configured. In the case of a single-layer structure, it is desirable to reduce the thickness of the thin-walled connecting portion as much as possible in consideration of the ease of rotation by reducing the stress when changing from the open state to the closed state.
  • the inner peripheral edge of the core back portion is a smooth surface without a step, but may have a step, and the outer edge of the inner peripheral edge of the core back portion of each divided iron core.
  • the angle formed between the line connecting the portions and the teeth portion may be an obtuse angle in the open state and an acute angle in the closed state.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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

Abstract

L'invention concerne un stator qui est pourvu : d'une partie dent (5) autour de laquelle une bobine est enroulée et fixée ; d'une partie arrière de noyau (3a, 3b) dont une extrémité est connectée à la partie dent (5) par l'intermédiaire d'une partie de connexion mince (1a, 1b) et constituant un trajet magnétique. La partie dent (5) et la partie arrière de noyau (3a, 3b) peuvent avoir un état ouvert et un état fermé par ouverture et fermeture de la partie de connexion mince (1a, 1b). Dans l'état ouvert, la partie dent (5) et la partie arrière de noyau (3a, 3b) forment un angle aigu, et, dans l'état fermé, la partie dent (5) et la partie arrière de noyau (3a 3b) viennent en butée l'une contre l'autre et forment un angle aigu.
PCT/JP2016/063088 2016-04-26 2016-04-26 Stator, moteur électrique, procédés de fabrication de stator et de moteur électrique WO2017187522A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2016/063088 WO2017187522A1 (fr) 2016-04-26 2016-04-26 Stator, moteur électrique, procédés de fabrication de stator et de moteur électrique
JP2016567279A JP6207769B1 (ja) 2016-04-26 2016-04-26 固定子、電動機、固定子の製造方法および電動機の製造方法
TW105127863A TWI620398B (zh) 2016-04-26 2016-08-30 定子、電動機、定子之製造方法及電動機之製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/063088 WO2017187522A1 (fr) 2016-04-26 2016-04-26 Stator, moteur électrique, procédés de fabrication de stator et de moteur électrique

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WO2017187522A1 true WO2017187522A1 (fr) 2017-11-02

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JPWO2021053797A1 (fr) * 2019-09-19 2021-03-25
WO2022064748A1 (fr) * 2020-09-28 2022-03-31 日立グローバルライフソリューションズ株式会社 Moteur, soufflante électrique et nettoyeur électrique

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JP2000232740A (ja) * 1999-02-12 2000-08-22 Mitsubishi Electric Corp 電動機および製造方法
JP2003134701A (ja) * 2001-10-29 2003-05-09 Yaskawa Electric Corp Ａｃモータの固定子及びその製造方法

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JP2000232740A (ja) * 1999-02-12 2000-08-22 Mitsubishi Electric Corp 電動機および製造方法
JP2003134701A (ja) * 2001-10-29 2003-05-09 Yaskawa Electric Corp Ａｃモータの固定子及びその製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2021053797A1 (fr) * 2019-09-19 2021-03-25
JP7170891B2 (ja) 2019-09-19 2022-11-14 三菱電機株式会社 回転電機及び天井扇風機
WO2022064748A1 (fr) * 2020-09-28 2022-03-31 日立グローバルライフソリューションズ株式会社 Moteur, soufflante électrique et nettoyeur électrique
JP7426318B2 (ja) 2020-09-28 2024-02-01 日立グローバルライフソリューションズ株式会社 電動機、電動送風機および電気掃除機

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JPWO2017187522A1 (ja) 2018-05-17
TW201739146A (zh) 2017-11-01
JP6207769B1 (ja) 2017-10-04

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