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WO2025177674A1 - Moteur électrique, procédé de fabrication de moteur électrique, compresseur et dispositif - Google Patents

Moteur électrique, procédé de fabrication de moteur électrique, compresseur et dispositif

Info

Publication number
WO2025177674A1
WO2025177674A1 PCT/JP2024/043733 JP2024043733W WO2025177674A1 WO 2025177674 A1 WO2025177674 A1 WO 2025177674A1 JP 2024043733 W JP2024043733 W JP 2024043733W WO 2025177674 A1 WO2025177674 A1 WO 2025177674A1
Authority
WO
WIPO (PCT)
Prior art keywords
yoke
electric motor
tooth
stator
insulator
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/JP2024/043733
Other languages
English (en)
Japanese (ja)
Inventor
聡 和田
浩児 千葉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2025177674A1 publication Critical patent/WO2025177674A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure

Definitions

  • Patent Document 1 describes an electric motor in which an insulator, a split stator, and an insulating film are integrally molded from resin.
  • Patent Document 2 describes an electric motor in which a step is formed in a split stator, an insulator is fitted into the step, and a film is attached to the slot.
  • Patent Document 3 describes an electric motor in which a split stator and a film are sandwiched between upper and lower insulators.
  • the present invention aims to provide an electric motor in which a split stator and an insulator are insert-molded together, and in which, when an insulating film is used, a reduction in slot area due to the insulating film can be prevented; a manufacturing method for this electric motor; a compressor using this electric motor; and equipment using this compressor.
  • the electric motor 14 of the present invention is an electric motor 14 in which split stators 30A, each split into a plurality of pieces for each tooth portion 32, are arranged in an annular shape, a rotor 20 is arranged on the inner periphery of the plurality of split stators 30A arranged in an annular shape, the split stators 30A have arc-shaped yoke portions 31 centered on the rotation axis 4 of the rotor 20, the teeth portions 32 extending from the yoke portions 31 toward the rotor 20, and umbrella portions 33 formed at the tips of the teeth portions 32, slots 34 are formed between adjacent split stators 30A, and an insulating film 60 is provided to electrically insulate windings 41 wound around the teeth portions 32.
  • An insulator 50 is formed on each stator end face in the sheet stacking direction of the split stator 30A, and the insulator 50 formed on one stator end face and the insulator 50 formed on the other stator end face are connected by a connecting portion 54 made of a resin material that forms the insulator 50.
  • a teeth exposed surface 32E that is not covered with the resin material is formed on the circumferential side of the tooth portion 32, and a yoke exposed surface 31E that is not covered with the resin material is formed on the inner surface of the yoke portion 31, and the teeth exposed surface 32E and the yoke exposed surface 31E are covered with the insulating film 60.
  • the present invention of claim 2 is characterized in that, in the electric motor 14 of claim 1, tooth step portions 32S are formed on each tooth end face in the sheet stacking direction of the tooth portion 32 by narrowing the tooth width, yoke step portions 31S continuous with the tooth step portions 32S are formed on the inner peripheral surface of the yoke portion 31, umbrella step portions 33S continuous with the tooth step portions 32S are formed on the outer peripheral surface of the umbrella portion 33, the tooth step portions 32S, the yoke step portions 31S, and the umbrella step portions 33S are covered with the resin material, the space between the tooth step portions 32S formed on one of the tooth end faces and the tooth step portions 32S formed on the other tooth end face is defined as the tooth exposed surface 32E, and the inner peripheral surface of the yoke portion 31 excluding the yoke step portions 31S is defined as the yoke exposed surface 31E.
  • the present invention described in claim 3 is characterized in that, in the electric motor 14 described in claim 2, the insulating film 60 covers at least a portion of the tooth portion step portion 32S on the circumferential side of the tooth portion 32, and covers the yoke portion step portion 31S on the inner surface of the yoke portion 31.
  • the present invention described in claim 4 is characterized in that, in the electric motor 14 described in claim 1, the connecting portion 54 has a yoke portion connecting portion 54a formed on the outer peripheral surface of the yoke portion 31 and an umbrella portion connecting portion 54b formed on the umbrella portion 33.
  • the present invention according to a fifth aspect is characterized in that in the electric motor 14 according to the fourth aspect, the head portion connecting portion 54 b is formed on the outer circumferential surface of the head portion 33 .
  • the umbrella portion connecting portions 54 b are formed on both side surfaces of the umbrella portion 33 .
  • the present invention described in claim 7 is characterized in that, in the electric motor 14 described in claim 2, the tooth step width 32SW of the tooth step portion 32S is 96% or more of the step-free tooth portion width 32W in which the tooth step portion 32S is not formed.
  • the present invention according to claim 8 is characterized in that in the electric motor 14 according to claim 2, the yoke portion step portion 31S and the umbrella portion step portion 33S are set to 3 mm or less.
  • the present invention as set forth in claim 9 is characterized in that, in the electric motor 14 as set forth in claim 1, an engaging portion made of the resin material is formed on the outer surface of the umbrella portion 33, and a locking piece that engages with the engaging portion is formed on the insulating film 60.
  • the manufacturing method of the electric motor 14 of the present invention described in claim 10 is a manufacturing method of the electric motor 14 described in claims 1 to 9, characterized in that each of the multiple stator core sheets constituting the split stator 30A is placed in a mold without being connected, and the resin material is injected into the mold, thereby insert-molding the insulator 50 and the connecting portion 54.
  • an insulating film is provided to cover the exposed tooth surfaces and exposed yoke surfaces, a reduction in slot area can be prevented.
  • an insulating film By providing an insulating film, interphase paper is not required and an insulating distance can be secured between the split stator connection surface and the winding.
  • by forming exposed tooth surfaces and exposed yoke surfaces cracking of the resin material due to heat shock or stress when winding the winding can be prevented.
  • the electric motor of the first embodiment has a yoke portion connecting portion formed on the outer peripheral surface of the yoke portion and an umbrella portion connecting portion formed on the umbrella portion as connecting portions.
  • the yoke portion connecting portion and the umbrella portion connecting portion connect the insulators located on one stator end face to the insulators located on the other stator end face, preventing stress from being applied to the split stator when winding the windings and preventing an increase in iron loss, and also reducing noise as the stacked stator core sheets are in close contact with each other.
  • the method for manufacturing an electric motor according to an eleventh embodiment of the present invention is a method for manufacturing an electric motor according to any of the first to ninth embodiments, in which multiple stator core sheets that make up the split stator are stacked, the stacked stator core sheets are integrated by laser welding at the outer peripheral surface of the yoke portion, the integrated stator core sheets are placed in a mold, and resin material is injected into the mold to insert-mold the insulator and connecting portion. According to this embodiment, iron loss due to entanglement when connecting the individual stator core sheets is not generated, making it possible to provide a compressor with high motor efficiency.
  • the main bearing member 7a is fixed inside the sealed container 1 by welding, shrink fitting, or the like, and supports the rotating shaft 4. One end of the rotating shaft 4 is supported by the main bearing member 7a, and the other end is supported by a bearing 7b.
  • a fixed scroll 13j is bolted to this main bearing member 7a.
  • An orbiting scroll 13k that meshes with the fixed scroll 13j is sandwiched between the main bearing member 7a and the fixed scroll 13j.
  • the fixed scroll 13j and the orbiting scroll 13k constitute a scroll-type compression mechanism 13.
  • a rotation restraint mechanism 9, such as an Oldham ring, is provided between the orbiting scroll 13k and the main bearing member 7a.
  • the rotation restraint mechanism 9 prevents the orbiting scroll 13k from rotating on its axis and guides the orbiting scroll 13k to move in a circular orbit.
  • the orbiting scroll 13k is eccentrically driven by an eccentric portion 4a provided at the upper end of the rotary shaft 4. Due to this eccentric drive, the compression chamber formed between the fixed scroll 13j and the orbiting scroll 13k moves from the outer periphery toward the center of the compression mechanism portion 13, reducing its volume and performing compression.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne un moteur électrique (14), un procédé de fabrication du moteur électrique (14), un compresseur (10) utilisant le moteur électrique (14), et un dispositif utilisant le compresseur (10). Dans le moteur électrique (14), une zone de fente peut être empêchée d'être réduite en raison d'un film isolant (60) de telle sorte que : un isolant (50) est formé sur chaque face d'extrémité de stator dans la direction de stratification de feuille d'un stator divisé (30A) ; l'isolant (50) formé sur une face d'extrémité de stator et l'isolant (50) formé sur l'autre face d'extrémité de stator sont reliés par une partie de liaison (54) constituée d'un matériau de résine formant l'isolant (50) ; une face exposée de dent (32E) qui n'est pas recouverte du matériau de résine est formée sur la face latérale circonférentielle d'une partie dent (32) ; une face exposée de culasse (31E) qui n'est pas recouverte du matériau de résine est formée sur la face périphérique interne d'une partie culasse (31) ; et la face exposée de dent (32E) et la face exposée de culasse (31E) sont recouvertes du film isolant (60).
PCT/JP2024/043733 2024-02-20 2024-12-11 Moteur électrique, procédé de fabrication de moteur électrique, compresseur et dispositif Pending WO2025177674A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024-023523 2024-02-20
JP2024023523 2024-02-20

Publications (1)

Publication Number Publication Date
WO2025177674A1 true WO2025177674A1 (fr) 2025-08-28

Family

ID=96846818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/043733 Pending WO2025177674A1 (fr) 2024-02-20 2024-12-11 Moteur électrique, procédé de fabrication de moteur électrique, compresseur et dispositif

Country Status (1)

Country Link
WO (1) WO2025177674A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001112205A (ja) * 1999-10-08 2001-04-20 Matsushita Electric Ind Co Ltd 電動機およびその応用機器
JP2011188675A (ja) * 2010-03-10 2011-09-22 Mitsubishi Electric Corp 電動機、電動機の製造方法、圧縮機
JP2013158095A (ja) * 2012-01-27 2013-08-15 Mitsubishi Electric Corp 回転電機のステータおよび回転電機のステータの製造方法
WO2017179115A1 (fr) * 2016-04-12 2017-10-19 三菱電機株式会社 Moteur électrique, compresseur et dispositif à cycle de réfrigération

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001112205A (ja) * 1999-10-08 2001-04-20 Matsushita Electric Ind Co Ltd 電動機およびその応用機器
JP2011188675A (ja) * 2010-03-10 2011-09-22 Mitsubishi Electric Corp 電動機、電動機の製造方法、圧縮機
JP2013158095A (ja) * 2012-01-27 2013-08-15 Mitsubishi Electric Corp 回転電機のステータおよび回転電機のステータの製造方法
WO2017179115A1 (fr) * 2016-04-12 2017-10-19 三菱電機株式会社 Moteur électrique, compresseur et dispositif à cycle de réfrigération

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