WO2017130274A1 - Stator pour machine électrique rotative - Google Patents

Stator pour machine électrique rotative Download PDF

Info

Publication number
WO2017130274A1
WO2017130274A1 PCT/JP2016/052001 JP2016052001W WO2017130274A1 WO 2017130274 A1 WO2017130274 A1 WO 2017130274A1 JP 2016052001 W JP2016052001 W JP 2016052001W WO 2017130274 A1 WO2017130274 A1 WO 2017130274A1
Authority
WO
WIPO (PCT)
Prior art keywords
varnish
stator
electric wire
reservoir
coil
Prior art date
Application number
PCT/JP2016/052001
Other languages
English (en)
Japanese (ja)
Inventor
長谷川　覚
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/JP2016/052001 priority Critical patent/WO2017130274A1/fr
Publication of WO2017130274A1 publication Critical patent/WO2017130274A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Definitions

  • This invention relates to a stator of a rotating electric machine in which a coil is provided on a tooth portion of a stator core via an insulator.
  • a varnish guide hole is provided in a flange portion of an insulator.
  • the varnish guide hole has a varnish dripping port and a guide hole outlet.
  • a varnish guide groove connected to the guide hole outlet is provided in a portion where the electric wire of the insulator is wound. After the electric wire is wound around the insulator, the varnish is dropped into the varnish dropping port, thereby impregnating the varnish inside the coil (for example, see Patent Document 1).
  • JP 2014-7836 A Japanese Patent Laid-Open No. 9-92548
  • the varnish induction groove is provided in a portion around which the electric wire of the insulator is wound, when the electric wire is wound around the insulator, the electric wire is formed at the corner of the edge of the groove. The insulation film of the electric wire is damaged and the insulation performance of the coil is lowered.
  • the varnish guide groove has one stator radial groove and a plurality of stator circumferential grooves, and the direction in which the wire is wound and the direction of the stator circumferential groove are the same. Enters the circumferential groove of the stator, the rows of wires are disturbed, and the space factor of the wires decreases.
  • the present invention has been made to solve the above-described problems, and prevents damage to the insulating coating of the electric wire and lowering of the space factor of the electric wire while ensuring the permeability of the varnish to the coil.
  • An object of the present invention is to provide a stator for a rotating electrical machine that can avoid the restriction of the degree of freedom of teeth pitch.
  • a stator for a rotating electrical machine includes a stator core having a tooth portion, an electric wire, a coil provided in the tooth portion, and an insulator interposed between the tooth portion and the coil.
  • a plurality of continuous projections are provided, a varnish reservoir is provided between adjacent projections, and a varnish introduction groove connected to the varnish reservoir is provided on the flange, and each projection The surface of the part that contacts the electric wire is rounded.
  • the stator of the rotating electrical machine of the present invention is provided with a plurality of projections that are continuous along the radial direction of the stator core, and a varnish reservoir is provided between adjacent projections. Because the surface that touches the wire of the part is rounded, it is possible to prevent damage to the insulation film of the wire and decrease in the space factor of the wire while ensuring the permeability of the varnish to the coil. It can be avoided that the freedom of teeth pitch is limited.
  • FIG. 1 is a cross-sectional view showing a half of a cross section along the axis of an elevator hoist according to Embodiment 1 of the present invention
  • FIG. 2 is a cross-sectional view showing a half of a cross section perpendicular to the axis of the hoist of FIG. is there.
  • a bowl-shaped outer frame 1 includes a disk part 1a, a shaft part 1b protruding from the center of the disk part 1a to one side in the axial direction, and one side in the axial direction from the outer peripheral part of the disk part 1a. And a cylindrical stator mounting portion 1c that protrudes toward the center.
  • Rotating body 3 is supported on shaft 1b via a pair of bearings 2.
  • the rotating body 3 rotates about the shaft portion 1b with respect to the outer frame 1.
  • the rotating body 3 has a cylindrical magnet mounting portion 3a.
  • a sheave 4 is fixed to one side of the rotating body 3 in the axial direction.
  • the sheave 4 rotates integrally with the rotating body 3 around the shaft portion 1b.
  • a suspension body (not shown) for suspending a cage (not shown) and a counterweight (not shown) is wound around the sheave 4. The cage and the counterweight move up and down as the sheave 4 rotates.
  • the hoisting machine motor 5 that rotates the sheave 4 includes a permanent magnet 6 fixed to the outer peripheral surface of the magnet mounting portion 3a and a stator 7 fixed to the inner peripheral surface of the stator mounting portion 1c. is doing.
  • the permanent magnet 6 and the stator 7 are opposed to each other.
  • the stator 7 has a stator core 8 and a plurality of coils 9.
  • the stator core 8 has an annular core back portion 8a and a plurality of teeth portions 8b protruding radially inward from the core back portion 8a.
  • the teeth part 8b is provided at equal intervals in the circumferential direction of the core back part 8a.
  • a disc-shaped cover 10 covering the hoisting machine motor 5 is fixed to the end of the stator mounting portion 1c opposite to the disc portion 1a.
  • a circular opening 10 a through which the sheave 4 passes is provided in the center of the cover 10.
  • the outer frame 1 supports a pair of hoisting machine brakes 11 (not shown in FIG. 1) that brake the rotation of the rotating body 3 and the sheave 4.
  • Each hoisting machine brake 11 includes a brake shoe 12, a brake spring (not shown) that presses the brake shoe 12 against the inner peripheral surface of the magnet mounting portion 3a, and the brake shoe 12 from the magnet mounting portion 3a against the brake spring. And an electromagnetic magnet 13 to be pulled apart.
  • FIG. 3 is a cross-sectional view showing the entire circumference of a cross section perpendicular to the axis of the stator of FIG.
  • the stator core 8 is configured by arranging a plurality of core blocks in the circumferential direction.
  • Each coil 9 is comprised by the electric wire 9a wound around the teeth part 8b.
  • the electric wire 9a is wound around the teeth part 8b by the concentrated winding method.
  • the electric wire 9a is wound in several layers with the gap as small as possible and with as much alignment as possible. Thereby, the space factor of the electric wire 9a is raised.
  • FIG. 4 is a side view of one tooth portion 8b in a state where the coil 9 of FIG. 3 is removed as viewed along the circumferential direction of the stator core 8, and the right side of FIG. 4 is the tip of the tooth portion 8b. Further, the left-right direction in FIG. 4 is the radial direction of the stator core 8, and the up-down direction in FIG. 4 is the axial direction of the stator core 8.
  • a pair of insulators 21 are interposed between the teeth portion 8 b and the coil 9.
  • the insulator 21 is attached to the tooth portion 8b from both sides of the stator core 8 in the axial direction.
  • FIG. 5 is a perspective view showing the insulator 21 of FIG.
  • Each insulator 21 has a U-shaped wire winding portion 21a around which the electric wire 9a is wound, a first flange portion 21b protruding outward from the end of the wire winding portion 21a on the tip side of the tooth portion 8b, And a second flange portion 21c protruding outward from the end portion of the wire winding portion 21a on the core back portion 8a side.
  • a plurality of bank-like protrusions 21 d that are continuous along the radial direction of the stator core 8 are provided on the outer surface of the portion of the wire winding portion 21 a that is in contact with the axial end surface of the stator core 8.
  • the varnish reservoir part 21e is provided between the adjacent protrusion parts 21d.
  • one insulator 21 is provided with two protrusions 21d and one varnish reservoir 21e.
  • the varnish reservoir 21e intersects the winding direction of the electric wire 9a, and is orthogonal here.
  • a plurality of first varnish introduction grooves 21f connected to the varnish reservoir portion 21e are provided on the surface of the first flange portion 21b on the coil 9 side.
  • a plurality of second varnish introduction grooves 21g connected to the varnish reservoir portion 21e are provided on the surface of the second flange portion 21c on the coil 9 side.
  • the first and second varnish introduction grooves 21f and 21g are provided in a straight line continuously from the varnish reservoir 21e to the end face of the insulator 21 in the axial direction of the stator core 8.
  • two first and second varnish introduction grooves 21f and 21g are provided for each varnish reservoir 21e.
  • each protrusion 21d The surface in contact with the electric wire 9a of each protrusion 21d is rounded. Specifically, as shown in FIG. 6, the corners on both sides of the tip of the protrusion 21d are rounded.
  • each varnish introduction groove 21f, 21g is rounded. Specifically, as shown in FIG. 7, the varnish introduction grooves 21 f and 21 g are rounded at the edges on both sides in the width direction.
  • the width dimension of the varnish reservoir portion 21e (dimension in the direction perpendicular to the paper surface in FIG. 4) is larger than the width dimension of the varnish introduction grooves 21f and 21g (dimension in the direction perpendicular to the paper surface in FIG. 4).
  • the insulator 21 has a thin portion and a thick portion having a thickness dimension larger than that of the thin portion, and the varnish reservoir portion 21e and the varnish introduction grooves 21f and 21g are provided only in the thick portion.
  • the portions where the varnish reservoir 21e and the varnish introduction grooves 21f and 21g in FIGS. 4 and 5 are provided are thick portions.
  • the thick-walled portion is a portion related to improvement of the winding workability of the electric wire 9a, and even if the varnish reservoir portion 21e and the varnish introduction grooves 21f and 21g are provided, the insulating performance of the insulator 21 is not affected.
  • the coil 9 is impregnated with varnish.
  • the varnish is hung on at least one of the varnish introduction grooves 21 f and 21 g and the surface layer of the coil 9. A part of the varnish hung down reaches the varnish reservoir 21e. By dropping an appropriate amount of varnish, it is possible to penetrate the varnish throughout the coil 9 even for a coil having a high space factor.
  • the adjacent surfaces of the teeth portion 8b do not protrude in a mountain shape, it is not necessary to increase the teeth pitch, and it is possible to avoid limiting the freedom of the teeth pitch.
  • the width dimension of the varnish reservoir 21e is larger than the width dimension of the varnish introduction grooves 21f, 21g, the varnish smoothly moves to the varnish reservoir 21e without staying in the varnish introduction grooves 21f, 21g. This makes it easy for the varnish to penetrate the entire coil 9.
  • the varnish reservoir portion 21e and the varnish introduction grooves 21f and 21g are provided only in the thick portion of the insulator 21, the insulation performance of the insulator 21 can be more reliably maintained.
  • one insulator 21 is provided with two protrusions 21d and one varnish reservoir 21e.
  • three or more protrusions 21d are provided and two or more varnish reservoirs 21e are provided. It may be divided.
  • the number of varnish introduction grooves 21f and 21g is not limited to the above example. That is, the number and arrangement of the varnish reservoir 21e and the varnish introduction grooves 21f and 21g can be appropriately set according to the viscosity of the varnish, the diameter of the coil 9, and the like.
  • the first and second varnish introduction grooves 21f and 21g are provided in one insulator 21, but only one of them may be provided. Furthermore, in the above example, the same two insulators 21 are mounted on one tooth portion 8b, but they are not necessarily the same. For example, one insulator 21 may omit the varnish reservoir 21e and the varnish introduction grooves 21f and 21g.
  • the entire varnish reservoir 21e has the same depth dimension, but a recess is provided in the bottom surface of the varnish reservoir 21e to partially change the depth dimension of the varnish reservoir 21e. Also good. That is, in order to further improve the varnish penetration into the coil 9 due to the viscosity of the varnish, a recess may be provided at one end, both ends, or the center of the varnish reservoir 21e in the radial direction of the stator core 8. In this case, the bottom surface of the varnish reservoir 21e may be inclined to gradually change the depth dimension along the radial direction of the fixed iron core 8.
  • FIG. 8 shows a modification in which the depth dimension of the varnish reservoir 21e is gradually increased from both radial ends of the fixed iron core 8 toward the central portion.
  • FIG. 9 shows a modification in which the depth dimension of the varnish reservoir portion 21e is gradually increased from one end portion in the radial direction of the fixed iron core 8 toward the other end portion.
  • FIG. 10 shows a modification in which the depth dimension of the varnish reservoir portion 21e is gradually increased from the radial center portion of the fixed core 8 toward both end portions.
  • the rotor having the permanent magnet 6 is disposed inside the stator 7.
  • the present invention can also be applied to a type of stator disposed inside the rotor.
  • the present invention can also be applied to stators of various rotating electric machines other than elevator hoisting machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

Stator pour machine électrique rotative possédant un isolant disposé entre une bobine et une partie dentée d'un noyau en fer de stator. L'isolant comporte : une section d'enroulement de fil électrique sur laquelle est enroulé un fil électrique constituant la bobine ; et une section bride faisant saillie vers l'extérieur depuis la section d'enroulement de fil électrique. La section d'enroulement de fil électrique comporte une pluralité de parties saillantes situées successivement dans la direction radiale du noyau en fer de stator, et une partie de réservoir de vernis est disposée entre les parties saillantes mutuellement adjacentes. La section bride est pourvue d'une rainure d'introduction de vernis reliée à la partie de réservoir de vernis. La surface de chacune des parties saillantes en contact avec le fil électrique est formée de manière à être circulaire.
PCT/JP2016/052001 2016-01-25 2016-01-25 Stator pour machine électrique rotative WO2017130274A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/052001 WO2017130274A1 (fr) 2016-01-25 2016-01-25 Stator pour machine électrique rotative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/052001 WO2017130274A1 (fr) 2016-01-25 2016-01-25 Stator pour machine électrique rotative

Publications (1)

Publication Number Publication Date
WO2017130274A1 true WO2017130274A1 (fr) 2017-08-03

Family

ID=59397792

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/052001 WO2017130274A1 (fr) 2016-01-25 2016-01-25 Stator pour machine électrique rotative

Country Status (1)

Country Link
WO (1) WO2017130274A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06233487A (ja) * 1993-02-03 1994-08-19 Mitsubishi Electric Corp 発電子
WO2014020755A1 (fr) * 2012-08-03 2014-02-06 三菱電機株式会社 Machine électrique rotative

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06233487A (ja) * 1993-02-03 1994-08-19 Mitsubishi Electric Corp 発電子
WO2014020755A1 (fr) * 2012-08-03 2014-02-06 三菱電機株式会社 Machine électrique rotative

Similar Documents

Publication Publication Date Title
JP5892106B2 (ja) 回転電機及び回転子の製造方法
JP5483828B2 (ja) エレベータ用巻上機のモータ
JP2012244842A (ja) 回転電機
JP5888147B2 (ja) 回転電機のステータ
KR20100119209A (ko) 모터 및 그 제조방법과 세탁기
WO2017141562A1 (fr) Stator de machine électrique tournante, machine électrique tournante, et procédé de fabrication de stator de machine électrique tournante
JP2012039719A (ja) 回転電機のステータ及びその製造方法
WO2019073724A1 (fr) Stator pour machine dynamo-électrique
CN203596670U (zh) 定子冲片、定子铁芯和电机
JP7196691B2 (ja) ステータ
JP2011142770A (ja) 電機子及びブラシレスモータ
JP6771590B2 (ja) アキシャルギャップ型回転電機
WO2017130274A1 (fr) Stator pour machine électrique rotative
JP2008067493A (ja) 電動機、及びエレベータの巻上機
JP6448422B2 (ja) マルチギャップ型回転電機
JP5029049B2 (ja) 電機子、回転電機、圧縮機、送風機、空気調和機
WO2018105046A1 (fr) Machine électrique rotative de type à aimant permanent
JP2018182807A (ja) 電動機
JP5621608B2 (ja) アウターロータ型のモータ
JPWO2022009521A5 (ja) 固定子及び回転電機並びに回転電機の製造方法
JP2014050274A (ja) 表面磁石貼付型回転電機の回転子
KR20200079430A (ko) 전기자의 보빈 구조
JP2019216526A (ja) 回転子端板、回転子及び回転電機
JP2020178386A (ja) ロータ及び表面磁石型回転電機
JP6569439B2 (ja) 回転電機のステータ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16887861

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16887861

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP