WO2014115271A1 - Noyau de stator et moteur électrique - Google Patents

Noyau de stator et moteur électrique Download PDF

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Publication number
WO2014115271A1
WO2014115271A1 PCT/JP2013/051328 JP2013051328W WO2014115271A1 WO 2014115271 A1 WO2014115271 A1 WO 2014115271A1 JP 2013051328 W JP2013051328 W JP 2013051328W WO 2014115271 A1 WO2014115271 A1 WO 2014115271A1
Authority
WO
WIPO (PCT)
Prior art keywords
central axis
stator core
core back
back portion
core
Prior art date
Application number
PCT/JP2013/051328
Other languages
English (en)
Japanese (ja)
Inventor
大輔 金森
陽介 高石
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/JP2013/051328 priority Critical patent/WO2014115271A1/fr
Priority to TW102131516A priority patent/TW201431248A/zh
Publication of WO2014115271A1 publication Critical patent/WO2014115271A1/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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores

Definitions

  • the present invention relates to a stator core of an electric motor and an electric motor.
  • an electric motor including a rotor and a stator has been used.
  • the stator of such an electric motor is provided with a stator core in which divided iron cores each having a teeth iron core and a core back iron core are connected by welding.
  • Such a stator core is used as a stator of an electric motor by winding the teeth core portion.
  • Patent Document 1 When connecting the split iron cores by welding, if there is a displacement in the abutting surface, the performance and reliability of the motor may be reduced. Therefore, for example, in Patent Document 1, a configuration is provided in which concave and convex portions having a rectangular shape when viewed from the side surface are provided on the abutting surfaces where the divided iron cores are abutted with each other, and the abutting surfaces are engaged with each other, thereby suppressing misalignment between the divided iron cores. Is disclosed. Further, for example, Patent Document 2 discloses a configuration in which unevenness constituted by a plurality of inclined surfaces when viewed from the side surface is formed on the abutting surface of the split iron cores to suppress positional deviation between the split iron cores.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a stator core that is less likely to cause displacement of the core back portion during assembly or damage to the winding.
  • the present invention has a cylindrical core back portion, and projects from the inner surface of the core back portion toward the central axis of the cylindrical shape and along the central axis direction.
  • a core back portion that can be divided by a dividing surface extending in the direction of the central axis, and facing outward on both sides of the outer surface of the core back portion with the dividing surface interposed therebetween.
  • a welded portion that protrudes in the central axis direction and abuts with each other is formed, the contact surfaces of the welded portions exhibit a corrugated shape extending along the central axis direction, and the corrugated shapes mesh with each other.
  • the stator core according to the present invention has an effect that it is possible to obtain a stator core that is unlikely to cause a position shift of the core back portion during assembly or damage to the winding.
  • FIG. 1 is a diagram schematically illustrating the internal structure of the electric motor according to the first embodiment of the present invention, as viewed along the direction of the rotation axis.
  • FIG. 2 is a perspective view showing a schematic configuration of the stator core.
  • FIG. 3 is a perspective view showing a state in which the stator core is opened on the dividing surface.
  • FIG. 4 is an enlarged partial view of the welded portion of the stator core.
  • FIG. 5 is a diagram illustrating a state before the contact surfaces are abutted.
  • FIG. 6 is a diagram illustrating a state after the contact surfaces are butted.
  • FIG. 7 is a view showing an abutting surface having square-shaped unevenness as a comparative example.
  • FIG. 8 is a diagram illustrating a modification of the contact surface.
  • FIG. 1 is a diagram schematically illustrating the internal structure of the electric motor according to the first embodiment of the present invention, as viewed along the direction of the rotation axis.
  • the electric motor 30 includes a stator 10 and a rotor 20.
  • the rotor 20 is provided inside the stator 10 and is rotatable.
  • the stator 10 has a stator core 1 and a winding 2.
  • the winding 2 is wound around a tooth portion 3 formed on the stator core 1.
  • FIG. 2 is a perspective view showing a schematic configuration of the stator core 1.
  • FIG. 3 is a perspective view showing a state in which the stator core 1 is opened on the dividing surface, and shows a more detailed configuration.
  • the stator core 1 has a core back portion 4 and a teeth portion 3.
  • the core back part 4 has a cylindrical shape as a whole.
  • the central axis of the core back portion 4 having a cylindrical shape is defined as a central axis C.
  • the teeth part 3 is formed so as to protrude from the inner side surface of the core back part 4 toward the central axis C and to extend along the direction in which the central axis C extends.
  • a plurality of tooth portions 3 are formed on the inner side surface of the core back portion 4.
  • the stator core 1 is configured by combining a plurality of divided iron cores 5 as shown in FIG.
  • the divided iron core 5 includes a divided core back portion 4a obtained by dividing the core back portion 4 in the circumferential direction, and a tooth portion 3 formed on the divided core back portion 4a.
  • the split iron core 5 is configured by laminating a plurality of thin metal plates in the direction of the rotation axis C.
  • the split iron cores 5 are connected to each other by a connecting pin 6 and can be rotated around the connecting pin 6. In a state where all (9 in the first embodiment) the split cores 5 are connected, the split cores 5 positioned at the end portions are connected by welding, not by using the connecting pins 6.
  • the surface where the split iron cores 5 located at the ends contact each other is referred to as a split surface 7.
  • the stator core 1 can be divided by the dividing surface 7 extending in the direction of the central axis C before connection of the divided cores 5 by welding.
  • the side 7 a that is the inside of the cylindrical shape of the stator core 1 is a straight line.
  • the split surface 7 is configured by a plurality of surfaces having no irregularities in the direction along the central axis C, so that the side 7a that is the inner side of the cylindrical shape is straight.
  • the side 7a which is the inside of the cylindrical shape, is a side that is close to the tooth portion 3, but since the side 7a is a straight line, the winding 2 applied to the tooth portion 3 is less likely to be damaged than when there is unevenness. Become.
  • the contact surface 9 of the welded portion 8 has a corrugated shape extending along the direction of the central axis C so that the corrugated shape of one contact surface 9 and the corrugated shape of the other contact surface 9 are engaged with each other. It has become.
  • the waveform shape of the contact surface 9 is formed by a straight line. That is, when the stator core 1 is viewed from the outer surface, a plurality of triangular protrusions are formed on the contact surface 9, and the triangular protrusions have a continuous wave shape.
  • a protrusion is formed on the contact surface 9 such that the width in the direction of the central axis C decreases as the distance from the contact surface 9 increases.
  • the number of protrusions is not limited to the number shown in FIG.
  • FIG. 4 is a partial enlarged view in which the welded portion 8 of the stator core 1 is enlarged.
  • a gap 11 is formed between the welded portion 8 and the core back portion 4 of the stator core 1.
  • the gap 11 is formed between the welded portion 8 and the core back portion 4, so that heat generated when the welded portion 8 is welded is hardly transmitted to the core back portion 4.
  • deterioration of the core back part 4 by heat can be suppressed, and reduction of cogging torque can be aimed at.
  • FIG. 5 is a diagram showing a state before the contact surfaces 9 are abutted with each other in the welding process.
  • FIG. 6 is a diagram illustrating a state after the contact surface 9 is abutted in the welding process. As shown in FIG. 5, when the contact surfaces 9 are brought into contact with each other, there may be a case where the split iron cores 5 are displaced along the central axis C direction.
  • the contact surface 9 is formed in a corrugated shape, and one corrugated shape and the other corrugated shape are engaged with each other. If the contact surfaces 9 are brought into close contact with each other, the shift is naturally eliminated. Further, if pressure is applied so that the contact surfaces 9 are brought into close contact with each other, the split iron core 5 is hardly displaced during welding.
  • the welding location 12 of the welding part 8 is illustrated by the broken line. Since the contact surface 9 has a waveform shape, the welding locations 12 can be arranged on a straight line as shown in FIG. Thereby, when automation of a welding process is attained, it becomes possible to simplify operation
  • FIG. 7 is a view showing an abutting surface 109 having square-shaped irregularities as a comparative example.
  • the contact surface 109 having a square-shaped unevenness an accurate alignment without deviation is necessary before the contact surfaces are brought into close contact with each other. Invite to rise.
  • FIG. 8 is a view showing a modification of the contact surface 9.
  • the waveform shape of the contact surface 9 may be formed by a continuous curve. As shown in FIG. 8, even when the waveform shape of the contact surface 9 is formed as a continuous curve, it is formed in a waveform shape, and one waveform shape and the other waveform shape are engaged with each other. Then, if the contact surfaces 9 are brought into close contact with each other, the shift is naturally eliminated. Further, if pressure is applied so that the contact surfaces 9 are brought into close contact with each other, the split iron core 5 is hardly displaced during welding.
  • the number of dividing surfaces 7 provided in one stator core 1 is not limited to one, and a plurality of dividing surfaces 7 may be provided. Further, the number of divided cores included in one stator core 1 is not limited to nine. Moreover, the some teeth part 3 may be formed in the one division
  • stator core according to the present invention is useful for a stator core that connects divided iron cores by welding.
  • stator core 1 stator core, 2 windings, 3 teeth part, 4 core back part, 4a split core back part, 5 split core, 6 connecting pin, 7 split surface, 8 welded part, 9 abutment surface, 10 stator, 11 gap, 12 welding points, 20 rotors, 30 motors, 109 abutment surface, C central axis.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention concerne un noyau de stator (1) pourvu d'une partie arrière (4) de noyau présentant une forme cylindrique, et d'une pluralité de parties à dents (3) faisant saillie vers un axe central (C) de la forme cylindrique à partir d'une surface intérieure de la partie arrière (4) de noyau et s'étendant le long de la direction d'axe central (C), la partie arrière (4) de noyau pouvant être divisée par une surface de division (7) s'étendant dans la direction d'axe central (C), des soudures (8) faisant saillie vers l'extérieur, s'étendant dans la direction d'axe central (C), et venant en contact les unes avec les autres, étant formées sur les deux côtés de la surface de division (7) sur une surface extérieure de la partie arrière (4) de noyau, et des surfaces de contact (9) des soudures (8) présentant une forme d'onde s'étendant le long de la direction d'axe central (C) de sorte que les formes d'onde entrent en prise les unes avec les autres.
PCT/JP2013/051328 2013-01-23 2013-01-23 Noyau de stator et moteur électrique WO2014115271A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2013/051328 WO2014115271A1 (fr) 2013-01-23 2013-01-23 Noyau de stator et moteur électrique
TW102131516A TW201431248A (zh) 2013-01-23 2013-09-02 定子芯及電動機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/051328 WO2014115271A1 (fr) 2013-01-23 2013-01-23 Noyau de stator et moteur électrique

Publications (1)

Publication Number Publication Date
WO2014115271A1 true WO2014115271A1 (fr) 2014-07-31

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TW (1) TW201431248A (fr)
WO (1) WO2014115271A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018207277A1 (fr) * 2017-05-10 2018-11-15 三菱電機株式会社 Stator, moteur électrique, compresseur, dispositif de climatisation de réfrigération, et procédé pour produire un stator
JP6841975B1 (ja) * 2019-09-27 2021-03-10 三菱電機株式会社 電機子鉄心、電機子および電動機

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10340754B2 (en) * 2015-11-25 2019-07-02 Mitsubishi Electric Corporation Rotating electrical machine and method of manufacturing rotating electrical machine
CN106130208A (zh) * 2016-08-09 2016-11-16 珠海格力节能环保制冷技术研究中心有限公司 链式定子铁芯、电机定子及电机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0937491A (ja) * 1995-07-24 1997-02-07 Hitachi Ltd インダクションモータ
JP2003274584A (ja) * 2002-03-14 2003-09-26 Toyota Motor Corp モータのステータコア組立体
JP2003304655A (ja) * 2002-04-10 2003-10-24 Nippon Steel Corp 回転電機のステータ鉄心構造
JP2007166681A (ja) * 2005-12-09 2007-06-28 Toyota Motor Corp モーター用コア
JP2012205444A (ja) * 2011-03-28 2012-10-22 Daikin Ind Ltd ステータコアとその製造方法およびモータ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0937491A (ja) * 1995-07-24 1997-02-07 Hitachi Ltd インダクションモータ
JP2003274584A (ja) * 2002-03-14 2003-09-26 Toyota Motor Corp モータのステータコア組立体
JP2003304655A (ja) * 2002-04-10 2003-10-24 Nippon Steel Corp 回転電機のステータ鉄心構造
JP2007166681A (ja) * 2005-12-09 2007-06-28 Toyota Motor Corp モーター用コア
JP2012205444A (ja) * 2011-03-28 2012-10-22 Daikin Ind Ltd ステータコアとその製造方法およびモータ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018207277A1 (fr) * 2017-05-10 2018-11-15 三菱電機株式会社 Stator, moteur électrique, compresseur, dispositif de climatisation de réfrigération, et procédé pour produire un stator
JPWO2018207277A1 (ja) * 2017-05-10 2019-11-07 三菱電機株式会社 ステータ、電動機、圧縮機、及び冷凍空調装置、並びにステータの製造方法
JP6841975B1 (ja) * 2019-09-27 2021-03-10 三菱電機株式会社 電機子鉄心、電機子および電動機

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Publication number Publication date
TW201431248A (zh) 2014-08-01

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