WO2020054057A1 - 回転電機 - Google Patents

回転電機 Download PDF

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Publication number
WO2020054057A1
WO2020054057A1 PCT/JP2018/034214 JP2018034214W WO2020054057A1 WO 2020054057 A1 WO2020054057 A1 WO 2020054057A1 JP 2018034214 W JP2018034214 W JP 2018034214W WO 2020054057 A1 WO2020054057 A1 WO 2020054057A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric machine
frame
stator
steel plate
caulking
Prior art date
Application number
PCT/JP2018/034214
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
啓一 古西
拓志 滝澤
亀井　光一郎
慎悟 佐藤
拓磨 小野
義郎 今澤
真吾 井上
良介 梅原
原田　尚彦
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 JP2020546653A priority Critical patent/JP7094378B2/ja
Priority to CN201880097114.9A priority patent/CN112640258B/zh
Priority to PCT/JP2018/034214 priority patent/WO2020054057A1/ja
Publication of WO2020054057A1 publication Critical patent/WO2020054057A1/ja

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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

Definitions

  • the present application relates to a rotating electric machine.
  • a stator is provided inside an annular frame, and the rotor is further accommodated inside the stator via a gap.
  • the stator core is divided into a plurality of parts and is provided on the inner peripheral side of the frame.
  • the divided cores are manufactured by laminating a plurality of steel plates.
  • Patent Documents 1 and 2 Fixing of the split core between the steel plates is performed by caulking (Patent Documents 1 and 2).
  • the caulking is performed at two places on a circumferential portion of a steel plate that is in contact with an inner circumferential surface of a frame in which a divided core is fitted and held, and at the circumferential portion thereof.
  • One portion is provided at a tooth portion protruding inward from the portion, and three caulking points are arranged in a T-shape to be accurately stacked so as to form a divided core.
  • V caulking is used in many cases.
  • V caulking provided at two locations on the circumference is long in the circumferential direction
  • V caulking provided at one location on the teeth is long in the radial direction.
  • the steel plate is fixed with high precision so as not to hinder the flow of the magnetic flux.
  • a plurality of split cores in which V-crimps are arranged in a T-shape have coils wound around teeth portions.
  • the plurality of split cores around which the coil is wound are fitted into the frame by press fitting.
  • noise due to minute vibration is a problem.
  • the inventors have tried to increase the number of caulking and to strengthen the fixing between the steel sheets by arranging caulking in various directions in order to prevent vibration in the split core in which a plurality of steel sheets are stacked. Although somewhat improved, this vibration was not negligible. As a result of further study, it was considered that the cause was that the inner periphery of the frame and the laminated surface of the steel plates of the divided core did not uniformly contact when the divided core was press-fitted into the frame and fitted.
  • the present inventors have investigated the cause of the local contact of the split core with the frame at the center, and have found that the direction of V-caulking at the core circumferential portion is related to the deformation of the split core. That is, in a conventional rotating electric machine, a split core is formed by fixing and laminating a plurality of steel plates, and when a coil is wound around the steel plate, the tension in the winding causes the axial central portion of the outer periphery of the split core to expand. , A so-called barrel shape. Therefore, when a plurality of V-crimps are used when laminating steel plates, a problem of noise due to vibration occurs.
  • V caulking has two directions, long side and short side.
  • V caulking When V caulking is applied to laminated steel plates, It moves, albeit slightly. However, it hardly moves in the perpendicular direction (short side direction). Therefore, as described above, in the case of V caulking that is generally performed, since the long side direction of the V caulking of the circumferential portion of the divided core is oriented in the circumferential direction, the outer periphery of the divided core is press-fitted by the frame. Even when tightened, there is no radial movement between the laminated steel plates. If you try to keep the barrel shape, you will be struggling.
  • An object of the present application is to provide a rotating electric machine capable of suppressing vibration noise caused by micro-vibration by uniformly contacting the inner circumference of a frame and a laminated surface of steel plates of a divided core.
  • the rotating electric machine of the present application includes a stator and a rotor, the stator includes an annular frame, and a plurality of divided cores arranged in a circumferential direction inside the frame, and the divided core includes a caulking portion.
  • the caulking portion has a gap in the radial direction of the stator, and the first steel plate and the second steel plate are relatively fixed.
  • the present invention is characterized in that it is configured to be movable in the radial direction.
  • the rotating electric machine of the present application since the individual steel sheets on which the divided cores are stacked can move in the radial direction of the stator along the inner surface of the frame during press-fitting, the entire steel sheet extends in the entire stacking direction (core axis direction). Thus, a good press-fit contact state can be formed, and a rotating electric machine with low vibration and noise can be provided.
  • FIG. 3 is a perspective view showing a configuration of a split core of the rotary electric machine according to Embodiment 1.
  • FIG. 4 is a plan view showing a relationship between a frame of a stator of the rotating electric machine and a divided core, as viewed from an axial direction of the stator. It is a schematic block diagram which shows the structure of a rotary electric machine.
  • FIG. 3 is a radial cross-sectional view of a swaged portion of the split core according to the first embodiment.
  • FIG. 3 is a sectional view in the circumferential direction of a swaged portion of the split core according to the first embodiment.
  • FIG. 13 is a plan view showing the arrangement of the swaged portions of the split core according to the second embodiment.
  • FIG. 15 is a perspective view showing a configuration of a split core of a rotary electric machine according to Embodiment 3.
  • FIG. 14 is a radial cross-sectional view of a swaged portion of a split core according to a third embodiment.
  • FIG. 13 is a sectional view in the circumferential direction of a swaged portion of a split core according to a third embodiment.
  • FIG. 17 is a plan view showing the arrangement of the swaged portions of the split core according to the fourth embodiment.
  • FIG. 15 is a cross-sectional view of a rotating electric machine according to a fifth embodiment in a state where a coil is wound.
  • FIG. 15 is a cross-sectional view of a rotating electric machine according to a sixth embodiment in a state where a coil is wound. It is a figure showing the noise measurement result of the rotating electrical machine of the present application.
  • FIG. 1 is a perspective view showing a configuration of a split core of the rotary electric machine according to the first embodiment.
  • the split core 10 is configured by stacking a plurality of steel plates 11. The steel plates 11 are fixed to each other by a caulking portion 12 provided at one position on the teeth portion 14 of the steel plate 11.
  • the split core 10 according to the first embodiment is configured by being annularly combined with the inner periphery of an annular frame 30 as a stator 20 of a rotating electric machine. Press fit or shrink fit.
  • FIG. 2 is a plan view of the stator of the rotary electric machine according to Embodiment 1 as viewed from the axial direction of the rotor.
  • the coils wound around the split core 10 are not shown.
  • the same reference numerals indicate the same or corresponding parts.
  • FIG. 3 schematically shows the configuration of the rotating electric machine 100. That is, the rotating electric machine 100 includes the stator 20 and the rotor 40, and the rotor 40 rotates around the rotation shaft 41.
  • the stator 20 includes a split core 10, a concentrated winding coil 50 wound around the split core 10, and an annular frame 30 holding the split core 10.
  • the rotor 40 is supported by a bearing 42 so as to rotate about a rotation shaft 41.
  • the magnet mounted on the rotor 40 is not shown.
  • FIG. 4 is a cross-sectional view in the radial direction A of the caulking portion 12 for fixing the individual steel plates 11 to be laminated according to the first embodiment.
  • the laminated steel plate 11 is provided with a caulking portion 12 in which the cross-sectional shape of the uneven portion of the caulking portion 12 is V-shaped.
  • a gap 13 is provided between the steel plates 11 in the radial direction A of the caulking portion 12.
  • FIG. 5 is a cross-sectional view in the circumferential direction B of the caulking portion 12 for fixing the individual steel plates 11 to be stacked according to the first embodiment.
  • a very large force is required for the steel plate 11 to move because the punching surface is fitted with a tight fit and the bending rigidity is large.
  • the caulking portion 12 provided at one portion of the tooth portion 14 of the split core 10 is provided within a range where the concentrated winding coil 50 of the tooth portion 14 is wound. For this reason, when the steel plate 11 is tightened in the stacking direction by the concentrated winding coil 50, the thickness of the stacked divided cores 10 can be uniformly adjusted without causing significant displacement of the steel plate 11.
  • FIG. 6 shows a configuration of the second embodiment.
  • the crimping portion 12 is formed so that the longitudinal direction of the swaging portion 12 is the same in the circumferential portion 15 of the split core 10.
  • the resistance to the movement of the steel plate 11 constituting the split core 10 is increased, so that the “play” effect is slightly reduced.
  • FIG. 7 is a perspective view showing a configuration of a split core of a rotary electric machine according to Embodiment 3.
  • the split core 10 is configured by stacking a plurality of steel plates 11.
  • the steel plates 11 are fixed to each other by the caulking portion 12.
  • the caulking portion 12 is fixed by a circular caulking having a circular planar shape.
  • the caulking portion 12 having a concave-convex cross section is formed by a combination of a circle and an ellipse or an oval and an ellipse in a planar shape, and is fitted.
  • the movement between the laminated steel plates 11 is made anisotropic. That is, the caulking portion 12 is configured so that there is a difference in the state of misalignment between the long side direction and the short side direction.
  • FIG. 8 shows a cross section in the long side direction of the caulking portion 12.
  • the steel plates 11 when a force is applied in the direction of arrow F, the steel plates 11 can be slightly displaced from each other due to the gap 13 (play) formed by a circle and an ellipse or an ellipse. ing.
  • the steel plates 11 are fitted together. For this reason, the steel plates 11 cannot be displaced in the circumferential direction B.
  • a specific shape is not shown, a combination of an ellipse and an ellipse may be configured such that the short sides thereof are fitted to each other, and the long sides may be configured to have "play".
  • the caulking portion 12 can be a plurality of caulking portions, as in the case of the second embodiment shown in FIG. That is, as shown in a plan view of the split core 10 in FIG. 10, a crimping portion having the same longitudinal direction in the circumferential portion 15 of the split core 10 in addition to the teeth portion 14 of the split core 10 shown in FIG. 12 are additionally provided.
  • FIG. 11 is a cross-sectional view when the split core 10 having the caulked portion 12 shown in the first and third embodiments of the present application is fitted to the frame 30.
  • the frame 30 has a jacket 61 for forming a cooling water passage 60 for cooling the split core 10 on the outer peripheral side thereof.
  • the lamination surface of the split core 10 and the inner peripheral surface of the frame 30 after the fitting can form a sufficient contact state without any clearance over the entire length of the split core 10 in the axial direction. .
  • FIG. 12 shows a configuration similar to that of FIG.
  • the split core 10 used here has a configuration in which a plurality of caulking portions 12 are provided, so This shows a case where the resistance is obtained, that is, a case where the laminated surface of the steel plates 11 of the divided core 10 does not follow the surface of the frame 30 more than expected. That is, a gap occurs because the lamination surface of the steel sheet 11 of the split core 10 and the frame 30 are not sufficiently copied.
  • a resin portion 70 filled with resin and applied is provided in a gap between the laminated surface and the frame 30.
  • vibration noise can be suppressed. This is because the gap between the frame 30 and the split core 10 is reduced by providing a gap in the caulking portion 12 and making the laminated steel sheets easily shift in position, thereby increasing the amount of deformation as compared with the related art. The effect that only a small amount of resin needs to be filled can be obtained.
  • FIG. 13 shows the results of measurement of vibration noise performed to confirm the effect of the rotating electric machine of the present application.
  • the vertical axis represents the index of the noise level when the noise level of the conventional technology is set to 100
  • the horizontal axis represents the motor rotation speed to be subjected to the noise evaluation
  • the measurement result curve ( 1) shows the prior art
  • curve (2) shows the measurement result of noise in the case of the rotating electric machine according to the present application.
  • the gap 13 is similarly formed. By providing the same, a similar operation can be obtained.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2018/034214 2018-09-14 2018-09-14 回転電機 WO2020054057A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2020546653A JP7094378B2 (ja) 2018-09-14 2018-09-14 回転電機
CN201880097114.9A CN112640258B (zh) 2018-09-14 2018-09-14 旋转电机
PCT/JP2018/034214 WO2020054057A1 (ja) 2018-09-14 2018-09-14 回転電機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/034214 WO2020054057A1 (ja) 2018-09-14 2018-09-14 回転電機

Publications (1)

Publication Number Publication Date
WO2020054057A1 true WO2020054057A1 (ja) 2020-03-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/034214 WO2020054057A1 (ja) 2018-09-14 2018-09-14 回転電機

Country Status (3)

Country Link
JP (1) JP7094378B2 (zh)
CN (1) CN112640258B (zh)
WO (1) WO2020054057A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022213229A1 (de) 2021-12-28 2023-06-29 Nidec Corporation Elektrische Drehmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116260261B (zh) * 2023-05-12 2023-07-07 佛山市传恒机电制造有限公司 一种自扣铁芯结构及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040064936A1 (en) * 2002-10-08 2004-04-08 Neuenschwander Thomas R. Formable stack of interlocked laminations
JP2004328865A (ja) * 2003-04-23 2004-11-18 Mitsui High Tec Inc スキュー形状可変型積層鉄心及びその製造方法
JP2007318924A (ja) * 2006-05-26 2007-12-06 Sanden Corp 電動機のステータ固定構造
JP2009177907A (ja) * 2008-01-23 2009-08-06 Yaskawa Electric Corp 回転電動機のステータおよびそれを備えた回転電動機
JP2012110163A (ja) * 2010-11-18 2012-06-07 Aisin Aw Co Ltd 回転電機のロータコア
JP2018125967A (ja) * 2017-01-31 2018-08-09 アイシン精機株式会社 回転電機

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5019967B2 (ja) * 2007-06-20 2012-09-05 パナソニック株式会社 モータ用の積層コアとこれを用いるモータ
JP5380241B2 (ja) * 2009-10-14 2014-01-08 三菱電機株式会社 回転電機の積層固定鉄心
JP5740436B2 (ja) * 2013-06-14 2015-06-24 本田技研工業株式会社 回転電機のステータコア
JP6723348B2 (ja) * 2016-05-09 2020-07-15 三菱電機株式会社 固定子鉄心、及びその固定子鉄心を備えた電動機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040064936A1 (en) * 2002-10-08 2004-04-08 Neuenschwander Thomas R. Formable stack of interlocked laminations
JP2004328865A (ja) * 2003-04-23 2004-11-18 Mitsui High Tec Inc スキュー形状可変型積層鉄心及びその製造方法
JP2007318924A (ja) * 2006-05-26 2007-12-06 Sanden Corp 電動機のステータ固定構造
JP2009177907A (ja) * 2008-01-23 2009-08-06 Yaskawa Electric Corp 回転電動機のステータおよびそれを備えた回転電動機
JP2012110163A (ja) * 2010-11-18 2012-06-07 Aisin Aw Co Ltd 回転電機のロータコア
JP2018125967A (ja) * 2017-01-31 2018-08-09 アイシン精機株式会社 回転電機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022213229A1 (de) 2021-12-28 2023-06-29 Nidec Corporation Elektrische Drehmaschine

Also Published As

Publication number Publication date
CN112640258B (zh) 2023-09-29
JP7094378B2 (ja) 2022-07-01
CN112640258A (zh) 2021-04-09
JPWO2020054057A1 (ja) 2021-08-30

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