WO2017154087A1 - Stator de moteur électrique et moteur électrique - Google Patents

Stator de moteur électrique et moteur électrique Download PDF

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Publication number
WO2017154087A1
WO2017154087A1 PCT/JP2016/057069 JP2016057069W WO2017154087A1 WO 2017154087 A1 WO2017154087 A1 WO 2017154087A1 JP 2016057069 W JP2016057069 W JP 2016057069W WO 2017154087 A1 WO2017154087 A1 WO 2017154087A1
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WO
WIPO (PCT)
Prior art keywords
electric motor
opening
magnetic flux
stator
motor stator
Prior art date
Application number
PCT/JP2016/057069
Other languages
English (en)
Japanese (ja)
Inventor
増本　浩二
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/JP2016/057069 priority Critical patent/WO2017154087A1/fr
Priority to JP2018503880A priority patent/JP6598978B2/ja
Priority to CN201690001591.7U priority patent/CN208691029U/zh
Publication of WO2017154087A1 publication Critical patent/WO2017154087A1/fr

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    • 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

Definitions

  • the present invention relates to an electric motor stator and an electric motor used for a compressor, a fan motor and the like.
  • Patent Documents 1 and 2 Conventional stators of electric motors are formed by laminating electromagnetic steel sheets in which an iron core is integrally punched by a press or the like.
  • a method for fastening laminated electromagnetic steel sheets a method of forming dowels by caulking the electromagnetic steel sheets in a press die and caulking the upper and lower electromagnetic steel sheets (clamping) and a method of welding are common.
  • Patent Documents 1 and 2 there has been proposed one in which an iron core is divided into a plurality of iron core pieces in consideration of high density winding and productivity.
  • Patent Document 3 discloses a stator that is joined by attaching a joining band when joining the divided iron core pieces. In this case, the stator is joined by caulking or the like.
  • JP 2008-43102 A Japanese Patent Laid-Open No. 7-7875 JP 59-6736 A
  • An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide an electric motor stator and an electric motor that suppress the generation of eddy currents in fastening of laminated electromagnetic steel sheets and has high energy efficiency. Is.
  • the stator of the electric motor according to the present invention fastens the plurality of electromagnetic steel plates in the stacking direction with an iron core piece composed of a plurality of laminated electromagnetic steel plates having a core back portion and a teeth portion protruding from the core back portion to the inner peripheral surface.
  • a bonding band, and an opening is provided on an outer peripheral surface of the bonding band.
  • the opening is provided on the outer peripheral surface of the bonding band. Since there is no magnetic substance in the opening, the magnetic permeability of this portion is reduced, and the resistance (magnetic resistance) to the flow of magnetic flux is increased. Therefore, the magnetic flux flows around the opening, and the region where the magnetic flux flows on the outer peripheral surface of the bonding band is narrowed. And since the area
  • the eddy current generated is small in a portion where the electrical insulation resistance is high.
  • the stator and the motor of the electric motor according to the present invention it is possible to increase the resistance at the opening on the outer peripheral surface of the bonding band and to make the eddy current difficult to flow with respect to the eddy current at high frequency. Therefore, eddy current loss is suppressed, energy loss of the electric motor is reduced, and efficiency is improved.
  • FIG. 1 is a plan view of an electric motor using the stator of the electric motor according to Embodiment 1 of the present invention.
  • the electric motor 300 includes a stator 100 and a rotor 150.
  • the rotor 150 has a magnet 151, and the stator 100 has a winding 2.
  • the electric motor 300 is a permanent magnet type electric motor, but may be other types of electric motors such as an electromagnet type, a reluctance type, and a hysteris type.
  • FIG. 2 is a plan view of the stator of the electric motor according to Embodiment 1 of the present invention.
  • FIG. 3 is a plan view of the iron core piece of the stator of the electric motor according to Embodiment 1 of the present invention.
  • FIG. 4 is a front view of the iron core piece of the stator of the electric motor according to Embodiment 1 of the present invention.
  • a plurality of arc-shaped iron core pieces 101 are joined in an annular shape.
  • nine iron core pieces 101 are joined on the ring, but the number of iron core pieces constituting the ring is arbitrary, and one annular iron core that is not divided is used. It may be a piece.
  • the iron core piece 101 is formed by laminating a plurality of electromagnetic steel plates 104 in the vertical direction (Z-axis direction in FIG. 4).
  • the core piece 101 has a core back portion 103 that is positioned on the outer peripheral side of the stator 100 and becomes a core back when the stator 100 is formed, and a teeth portion 102 that protrudes from the core back portion 103 to the inner peripheral surface. ing.
  • a winding 2 is wound around the tooth portion 102 via the insulating member 1 (see FIGS. 1 and 2).
  • a groove 105 extending in the stacking direction of the electromagnetic steel plates 104 (Z-axis direction in FIG. 4) is formed on the outer periphery of the core back portion 103.
  • the groove 105 shown in FIGS. 2 and 3 is a square groove, but is not limited to this, and as long as the same function can be performed, a U-shaped groove, a V-shaped groove, and a semicircle are provided. It can be changed to various cross-sectional grooves such as a round groove.
  • FIG. 5 is a plan view of the iron core piece into which the joining band of the stator of the electric motor according to Embodiment 1 of the present invention is inserted.
  • FIG. 6 is a front view of the iron core piece into which the joining band of the stator of the electric motor according to Embodiment 1 of the present invention is inserted.
  • FIG. 7 is a left side view of the iron core piece into which the joining band of the stator of the electric motor according to Embodiment 1 of the present invention is inserted.
  • the bonding band 3 is inserted into the groove 105 of the iron core piece 101 shown in FIGS.
  • the joining band 3 is a prism that extends in the laminating direction (the Z-axis direction in FIGS.
  • the joining band 3 is inserted into the groove 105 shown in FIG. 3, and the laminated electromagnetic steel plates 104 constituting the iron core piece 101 are caulked and fastened by the upper end portion 4 and the lower end portion 5.
  • An opening 7 is formed on the surface of the outer peripheral surface 6 of the bonding band 3. Specifically, a plurality of openings 7 are arranged in the stacking direction of the electromagnetic steel sheets 104 (Z-axis direction in FIG. 6). Moreover, the arrangement
  • a plurality may be arranged in the circumferential direction (X-axis direction in FIG. 6).
  • the opening 7 may have a shape that is longer in the circumferential direction than the width in the stacking direction.
  • the width in the stacking direction and the width in the circumferential direction may be the same.
  • the opening part 7 should just have an opening in the surface of the outer peripheral surface part 6 of the joining band 3, and the opening may be a dent recessed in the inner peripheral surface direction, and may be a through-hole.
  • the bonding band 3 is preferably made of austenitic stainless steel or non-ferrous metal having a relative permeability of 1.01 or less.
  • the bonding band 3 is preferably composed of a SUS304 plate, a copper plate, a brass plate, an aluminum plate, or the like. If the bonding band 3 is made of such a material having a relative permeability of 1.01 or less, the magnetic resistance is sufficiently high with respect to the electromagnetic steel sheet, and no magnetic flux flows through the bonding band 3. Moreover, since these metals have appropriate strength and heat resistance, they can be constructed without having to increase the thickness and width of the bonding band 3.
  • the bonding band 3 may be made of engineering plastic.
  • the bonding band 3 is made of PPS, PBT, LCP, or PEEK material.
  • PPS polystyrene
  • PBT metal-oxide-semiconductor
  • LCP low-density polystyrene
  • PEEK polystyrene-semiconductor
  • Such an engineering plastic has a sufficiently low relative permeability with respect to a metal member, a sufficiently high magnetic resistance with respect to an electromagnetic steel sheet, and a magnetic flux does not flow through the bonding band 3.
  • the metal is light and has high electrical corrosion resistance, a long-life and lightweight motor can be obtained.
  • FIG. 8 is a diagram for explaining the flow of magnetic flux in the stator of a conventional electric motor.
  • the magnetic flux that flows through the stator 110 includes an outward radial magnetic flux 111 that extends from the center toward the circumference, a circumferential magnetic flux 112 that flows in the circumferential direction, and an inward radial magnetic flux 113 that extends from the circumference toward the center.
  • the direction of the magnetic flux is changed by changing + and-of the voltage applied to the electric motor, and the arrangement of the N pole and the S pole is spatially moved to generate a rotating magnetic field.
  • FIG. 9 is a diagram for explaining the flow of magnetic flux in the stator of the electric motor according to Embodiment 1 of the present invention.
  • the magnetic flux that flows through the stator 100 includes an outward radial magnetic flux 11 that extends from the center toward the circumference, a circumferential magnetic flux 12 that flows in the circumferential direction, and an inward radial magnetic flux 13 that extends from the circumference toward the center.
  • the circumferential eddy current 22 is an eddy current generated by the circumferential magnetic flux 12 in the bonding band 3
  • the inward radial eddy current 23 is an eddy current generated by the inward radial magnetic flux 13.
  • an outward radial eddy current is similarly generated with respect to the outward radial magnetic flux 11.
  • an opening 7 is provided in the joining band 3. Since there is no magnetic substance in the opening 7, the magnetic permeability of this portion is reduced, and the resistance (magnetic resistance) to the flow of the circumferential magnetic flux 12 is increased. Therefore, the circumferential magnetic flux 12 bypasses the opening 7 and flows through the non-opening 8, and the region where the circumferential magnetic flux 12 flows in the bonding band 3 becomes narrower. And since the area
  • the opening 7 is provided in the bonding band 3 to create a portion having a high insulation resistance against eddy currents at high frequencies. Therefore, even if circumferential eddy current 22, inward radial eddy current 23 and outward radial eddy current (not shown) generated by circumferential magnetic flux 12, outward radial magnetic flux 11 and inward radial magnetic flux 13 are generated. It is difficult for the openings 7 to have high electrical insulation resistance to flow, and eddy currents can be suppressed. Therefore, eddy current loss is suppressed, energy loss of the electric motor is reduced, and efficiency is improved.
  • the bonding band 3 into the groove 105 of the iron core piece 101, the position of the electromagnetic steel sheet 104 is fixed, and the electromagnetic steel sheet 104 is less likely to be displaced. Therefore, the iron core piece 101 on which the electromagnetic steel sheets 104 are laminated does not fall down or bend, and the shape accuracy in the lamination direction of the iron core piece 101 can be improved. Therefore, the productivity of windings and the like due to the shape accuracy is improved, and mechanical vibration and noise of the electric motor can be reduced and stabilized. Therefore, it is possible to obtain an electric motor with high efficiency, low vibration, low noise and high productivity.
  • FIG. FIG. 10 is a diagram for explaining the flow of magnetic flux in the stator of the electric motor according to Embodiment 2 of the present invention. 10, parts having the same configurations as those of the stators of FIGS. 2 to 9 are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 10, the magnetic flux flowing through the stator 120 has an outward radial magnetic flux 211 from the center toward the circumference, a circumferential magnetic flux 212, and an inward radial magnetic flux 213 from the circumference toward the center.
  • a plurality of openings 17 are arranged in the circumferential direction, and the openings 17 and the non-openings 18 are shifted. Since the opening 17 is arranged in this way, the path in the circumferential direction is blocked, and the circumferential magnetic flux 212 is less likely to flow, and the circumferential eddy current 222 can be suppressed. Further, since the opening portion 17 having an electrically high insulation resistance is displaced and a plurality of locations through which current flows can be blocked, the flow of the inward radial eddy current 223 with respect to the inward radial magnetic flux 213 is further hindered. Current can be suppressed. Although not shown, the outward radial eddy current with respect to the outward radial magnetic flux 211 can be similarly suppressed. Therefore, eddy current loss is suppressed, energy loss of the electric motor is reduced, and efficiency is improved.
  • the productivity of windings and the like due to the shape accuracy is improved, and mechanical vibration and noise of the electric motor are reduced and stabilized. Is possible. Therefore, it is possible to obtain an electric motor with high efficiency, low vibration, low noise and high productivity.
  • FIG. 11 is a diagram for explaining the flow of magnetic flux in the stator of the electric motor according to Embodiment 3 of the present invention.
  • parts having the same configurations as those of the stators of FIGS. 2 to 9 are denoted by the same reference numerals and description thereof is omitted.
  • the 11 has a coil end portion 9 protruding from the upper surface and the lower surface of the iron core piece 101.
  • the coil end portion 9 no magnetic steel sheet exists, but a magnetic flux 14 is also generated around the coil end portion 9.
  • the magnetic flux 14 at the coil end portion also passes through the electromagnetic steel sheet directly below and contributes to generating a rotating magnetic field. Therefore, the magnetic flux 15 that passes through the bonding band 53 in the radial direction is generated on the upper and lower surfaces of each iron core piece 101.
  • the stator 130 of the electric motor according to Embodiment 3 of the present invention has an opening portion 27 formed at an end portion in the laminating direction of the electromagnetic steel sheets as compared to the opening portion 7 formed at the center portion of the bonding band 53. Largely formed in the circumferential direction.
  • the opening 27 formed in the end portion of the bonding band 53 is formed larger in the circumferential direction than the opening 7 formed in the central portion, the vortex due to the magnetic flux 14 generated in the coil end portion 9 is formed. Current loss can be reduced.
  • the productivity of windings and the like resulting from the shape accuracy is improved, and mechanical vibration and noise of the electric motor are reduced and stabilized. It becomes possible. Therefore, it is possible to obtain an electric motor with high efficiency, low vibration, low noise and high productivity.
  • the bonding band may have a curved outer peripheral surface.
  • the surface shape of the opening 7 may be various shapes such as a rectangular shape, a circular shape, an elliptical shape, an oval shape, and may have an angle from the stacking direction to the circumferential direction.

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

Abstract

La présente invention concerne un stator de moteur électrique et un moteur électrique qui comportent : un élément noyau comprenant une pluralité de feuilles d'acier magnétiques stratifiées ayant chacune une partie arrière de noyau et une partie dent faisant saillie à partir de la partie arrière de noyau vers la surface circonférentielle interne ; et une bande d'assemblage pour fixer les feuilles d'acier magnétiques dans la direction de stratification. Des ouvertures sont pratiquées dans la surface circonférentielle externe de la bande d'assemblage.
PCT/JP2016/057069 2016-03-08 2016-03-08 Stator de moteur électrique et moteur électrique WO2017154087A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2016/057069 WO2017154087A1 (fr) 2016-03-08 2016-03-08 Stator de moteur électrique et moteur électrique
JP2018503880A JP6598978B2 (ja) 2016-03-08 2016-03-08 電動機の固定子及び電動機
CN201690001591.7U CN208691029U (zh) 2016-03-08 2016-03-08 电动机的定子以及电动机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/057069 WO2017154087A1 (fr) 2016-03-08 2016-03-08 Stator de moteur électrique et moteur électrique

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WO2017154087A1 true WO2017154087A1 (fr) 2017-09-14

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JP (1) JP6598978B2 (fr)
CN (1) CN208691029U (fr)
WO (1) WO2017154087A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021083229A (ja) * 2019-11-20 2021-05-27 三菱電機株式会社 回転電機の分割コア、回転電機、回転電機の分割コアの製造方法、および、回転電機の製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53117540U (fr) * 1977-02-25 1978-09-19
JP2006157997A (ja) * 2004-11-25 2006-06-15 Toshiba Corp 回転電機の固定子

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1320580A (fr) * 1962-04-26 1963-03-08 Cem Comp Electro Mec Perfectionnement aux machines électriques
JPS5843150A (ja) * 1981-09-08 1983-03-12 Fanuc Ltd 固定子
JPS58212337A (ja) * 1982-06-01 1983-12-10 Matsushita Electric Ind Co Ltd 電動機固定子
JPS596736A (ja) * 1982-07-02 1984-01-13 Matsushita Electric Ind Co Ltd 電動機固定子
KR100429990B1 (ko) * 2001-06-14 2004-05-04 엘지전자 주식회사 단상 라인 스타트 영구자석 동기전동기
JP2013243818A (ja) * 2012-05-18 2013-12-05 Mitsubishi Electric Corp 回転電機及びこの回転電機を備えた圧縮機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53117540U (fr) * 1977-02-25 1978-09-19
JP2006157997A (ja) * 2004-11-25 2006-06-15 Toshiba Corp 回転電機の固定子

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021083229A (ja) * 2019-11-20 2021-05-27 三菱電機株式会社 回転電機の分割コア、回転電機、回転電機の分割コアの製造方法、および、回転電機の製造方法

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JP6598978B2 (ja) 2019-10-30
JPWO2017154087A1 (ja) 2018-09-13
CN208691029U (zh) 2019-04-02

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