WO2020121555A1 - 回転電機のステータの製造方法及び回転電機 - Google Patents

回転電機のステータの製造方法及び回転電機 Download PDF

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Publication number
WO2020121555A1
WO2020121555A1 PCT/JP2019/020620 JP2019020620W WO2020121555A1 WO 2020121555 A1 WO2020121555 A1 WO 2020121555A1 JP 2019020620 W JP2019020620 W JP 2019020620W WO 2020121555 A1 WO2020121555 A1 WO 2020121555A1
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WO
WIPO (PCT)
Prior art keywords
inner peripheral
peripheral surface
stator core
stator
resin
Prior art date
Application number
PCT/JP2019/020620
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
雄也 平田
源三 岩城
和雄 西濱
敦 阿部
Original Assignee
株式会社日立産機システム
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 株式会社日立産機システム filed Critical 株式会社日立産機システム
Priority to CN201980064686.1A priority Critical patent/CN112840540A/zh
Priority to KR1020217006081A priority patent/KR20210039423A/ko
Publication of WO2020121555A1 publication Critical patent/WO2020121555A1/ja

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • 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
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • H02K3/493—Slot-closing devices magnetic

Definitions

  • the present invention relates to a method for manufacturing a stator of a rotary electric machine and a rotary electric machine.
  • the rotating electric machine includes a rotating shaft, a rotor fixed to the outer peripheral side of the rotating shaft, and a stator arranged apart from the outer peripheral side of the rotor.
  • the stator includes a stator core and coils inserted in a plurality of slots formed on the inner peripheral side of the stator core. Each slot is roughly divided into a storage part for housing the coil and an opening part that opens to the inner peripheral surface of the stator core.
  • the high-frequency magnetic flux flows along the inner peripheral surface of the stator core and the inner peripheral surface of the magnetic wedge, so that the high-frequency magnetic flux is prevented from leaking from the stator side to the rotor side. Therefore, the efficiency of the rotary electric machine can be improved.
  • Patent Document 1 discloses a method for manufacturing the stator of the rotating electric machine described above.
  • the mixture containing the magnetic powder and the semi-cured resin is filled in the openings of the plurality of slots by using an injection cylinder having an outer diameter dimension slightly smaller than the inner diameter dimension of the stator core. Then, the resin is cured to form a magnetic wedge.
  • the above-mentioned conventional technology has the following problems.
  • the inner peripheral surface of the magnetic wedge has the same circumference as the inner peripheral surface of the stator core. Not a face. Therefore, the leakage of high frequency magnetic flux from the stator side to the rotor side cannot be sufficiently suppressed. Further, it is necessary to change the outer diameter dimension of the injection cylinder according to the inner diameter dimension of the stator core.
  • the present invention has been made in view of the above matters, and easily equalizes the inner peripheral surface of the magnetic wedge so that the inner peripheral surface of the stator core has the same cylindrical side surface, thereby increasing the efficiency of the rotating electric machine. This is one of the challenges.
  • the present invention includes a plurality of means for solving the above problems.
  • a stator core comprising: a plurality of magnetic wedges, each of which is provided in an opening portion of each of the plurality of slots that open to an inner peripheral surface of a stator core, and includes a magnetic powder and a mixture containing a resin; And a first step of filling the mixture containing the resin in the uncured state or the semi-cured state into the openings of the plurality of slots, and a flexible sheet arranged along the inner peripheral surface of the stator core.
  • the inner peripheral surface of the mixture filled with the openings of the plurality of slots and containing the magnetic powder and the resin in the uncured state or the semi-cured state is the same cylinder with respect to the inner peripheral surface of the stator core.
  • the inner peripheral surface of the magnetic wedge can be easily leveled with the inner peripheral surface of the stator core so as to have the same cylindrical side surface, and the efficiency of the rotating electric machine can be improved.
  • FIG. 3 is a flowchart showing a procedure of a method for manufacturing a stator of a rotary electric machine according to an embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing a state in which an insulating material and a coil are inserted into a slot of the stator core according to the embodiment of the present invention.
  • FIG. 3 is a radial cross-sectional view showing a seat arranged along the inner peripheral surface of the stator core in the embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing a state where the inner peripheral surface of the mixture filled in the slots of the stator core is flattened using the sheet according to the embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing a state where the inner peripheral surface of the mixture filled in the slots of the stator core is flattened by using the sheet according to the first modified example of the present invention and the magnetic powder is attracted to the inner peripheral surface side of the mixture. is there.
  • FIG. 11 is a radial cross-sectional view showing a seat arranged along an inner peripheral surface of a stator core according to a second modified example of the present invention.
  • FIG. 1 is a radial cross-sectional view showing the structure of the rotary electric machine according to the present embodiment.
  • FIG. 2 is a partially enlarged cross-sectional view showing the structure of the stator of the rotary electric machine according to this embodiment.
  • the rotating electrical machine is a squirrel-cage induction motor, and includes a rotating shaft 1, a rotor 2 fixed to the outer peripheral side of the rotating shaft 1, and a stator 3 arranged apart from the outer peripheral side of the rotor 2. Equipped with.
  • the rotor 2 is inserted into a rotor core 4 and a plurality of slots 5 formed on the outer peripheral side of the rotor core 4, and a plurality of conductors extending in the axial direction of the rotor core 4 (direction perpendicular to the plane of the paper in FIG. 1).
  • the bar 6, an end ring (not shown) arranged on one axial side of the rotor core 4 and connecting one side end portions of the plurality of conductor bars 6, and a plurality of end rings arranged on the other axial side of the rotor core 4.
  • An end ring (not shown) that connects the other end of the conductor bar 6 is provided.
  • the rotor core 4 is composed of a plurality of electromagnetic steel plates laminated in the axial direction.
  • the stator 3 includes a stator core 7 and a coil 9 inserted into a plurality of slots 8 formed on the inner peripheral side of the stator core 7.
  • the stator core 7 is composed of a plurality of electromagnetic steel plates laminated in the axial direction.
  • the coil 9 has a portion inserted into the slot 8 and a portion (see FIG. 15 described later) protruding from the slot 8 to one side and the other side in the axial direction of the stator core 7. Then, when electric power is supplied to the coil 9, the stator 3 generates a rotating magnetic field to rotate the rotor 2 and the rotating shaft 1.
  • Each slot 8 is roughly divided into a storage portion 10 for housing the coil 9 and an opening portion 11 that opens to the inner peripheral surface of the stator core 7.
  • Each slot 8 is a semi-open type, and is formed such that the width dimension of the opening 11 in the circumferential direction (the left-right direction in FIG. 2) of the stator core 7 is smaller than the width dimension of the storage section 10.
  • An insulating material 12A (slot liner) is provided on the inner wall of the storage part 10 of each slot 8, and the insulating material 12B (sashiki) covers the coil 9 together with the insulating material 12A.
  • a plurality of teeth portions 13 are formed between the plurality of slots 8 of the stator core 7.
  • the magnetic wedge 14 described below is provided in the opening 11 of each slot 8, the magnetic flux density varies due to the difference in the magnetic permeability between the air and the teeth 13 existing in the opening 11 of the slot 8. Therefore, the high frequency magnetic flux leaks from the stator 3 side to the rotor 2 side, resulting in a loss. Therefore, in order to suppress such a loss and improve the efficiency of the rotary electric machine, a magnetic wedge 14 is provided in the opening 11 of each slot 8.
  • the magnetic wedge 14 is made of a mixture 17 containing a magnetic powder 15 (specifically, iron powder, for example) and a resin 16, and the volume ratio of the magnetic powder 15 is, for example, 60%.
  • the magnetic wedge 14 is provided in the opening 11 of each slot 8 and a part of the housing 10.
  • the magnetic wedge 14 is shaped so as to come into contact with the inner wall of the opening 11, the inner wall of the housing 10, and the insulating materials 12A and 12B. This prevents the magnetic wedge 14 from coming off the slot 8 of the stator core 7 even if the magnetic attraction force of the rotor 2 acts.
  • FIG. 3 is a flowchart showing the procedure of the method for manufacturing the stator of the rotary electric machine according to this embodiment.
  • step S1 the insulating material 12A, the coil 9, and the insulating material 12B are inserted into each slot 8 of the stator core 7 in that order, and they are fixed with a varnish or the like (see FIG. 4).
  • a resin sheet 18 having flexibility and water resistance is arranged along the entire inner peripheral surface of the stator core 7 (see FIG. 5).
  • the sheet 18 has a quadrangular shape and is rolled into a cylindrical shape (specifically, for example, as shown in FIG. 6, two opposite sides are in contact with each other, and the first corner and the second corner are in contact with each other. And is wound so that the third corner and the fourth corner are in contact with each other).
  • step S3 the mixture 17 containing the magnetic powder 15 and the resin 16 in the uncured state or the semi-cured state is applied from one axial side of the stator core 7 to the openings 11 of the slots 8 and a part of the storage portion 10. Fill. At this time, if the mixture 17 protrudes from each slot 8 to the other axial side of the stator core 7, this mixture 17 is removed.
  • step S4 the inner peripheral surface of the mixture 17 filled in each slot 8 is removed by using the seat 18 (specifically, by applying a force to the seat 18 along the inner peripheral surface of the stator core 7).
  • the inner peripheral surface of the stator core 7 is leveled so as to have the same cylindrical side surface (see FIG. 7). At this time, if the mixture 17 protrudes from each slot 8 to one side or the other side in the axial direction of the stator core 7, this mixture 17 is removed.
  • step S5 the resin 16 is cured by heating to form the magnetic wedge 14. If the sheet 18 does not have heat resistance, the sheet 18 is removed before the resin 16 is cured. On the other hand, if the sheet 18 has heat resistance, the sheet 18 may be removed after the resin 16 is cured.
  • the inner peripheral surface of the magnetic wedge 14 can be leveled so as to have the same cylindrical side surface as the inner peripheral surface of the stator core 7. As a result, it is possible to suppress the high-frequency magnetic flux from leaking from the stator 3 side to the rotor 2 side and improve the efficiency of the rotary electric machine. Moreover, by using the flexible sheet 18, the inner peripheral surface of the magnetic wedge 14 can be easily leveled. Moreover, even if the inner diameter of the stator core 7 is changed, it can be easily dealt with.
  • the resin 16 is a thermosetting type
  • the present invention is not limited to this, and modifications can be made without departing from the spirit and technical idea of the present invention.
  • the resin 16 may be a heat melting type (that is, a resin that is hardened by cooling).
  • each slot 8 is a semi-open type and the width dimension of the opening 11 is smaller than the width dimension of the storage portion 10 has been described as an example.
  • each slot 8 may be an open type, and the width dimension of the opening 11 may be the same as the width dimension of the storage unit 10.
  • the inner peripheral surface of the stator core 7 (in other words, the inner peripheral surface of the tooth portion 13) before the mixture 17 is filled in the opening 11 of each slot 8.
  • a release agent may be applied to.
  • the resin sheet 18 may be attached to the inner peripheral surface of the stator core 7 using an adhesive. In this case, by removing the seat 18, the mixture adhering to the inner peripheral surface of the stator core 7 can be easily removed.
  • a flexible magnet sheet 18A may be used to even out the inner peripheral surface of the mixture 17 filled in the openings 11 of the plurality of slots 8.
  • the magnet sheet 18A can be attached to the inner peripheral surface of the stator core 7 without using an adhesive.
  • the magnetic powder 15 can be attracted to the inner peripheral surface side of the mixture 17 by the magnetic force of the magnet sheet 18A.
  • the resin 16 can be cured to form the magnetic wedge 14.
  • the resin sheet 18 is used as in the above-described embodiment, an electromagnet or the like may be arranged inside the sheet 18 to achieve the same purpose as in the above-described first modification.
  • the seat 18 is arranged along the entire inner peripheral surface of the stator core 7 as an example, but the present invention is not limited to this, and is within a range not departing from the spirit and technical idea of the present invention. Can be transformed with. It suffices if the seat 18 or 18A can be arranged so as to cover at least one slot 8, that is, along the inner peripheral surface of at least two teeth portions 13. Specifically, for example, as in the second modification shown in FIG. 9, the seat 18 or 18A is provided so as to cover the two slots 8, that is, along the inner peripheral surfaces of the three teeth portions 13. You may arrange. Further, for example, as in the third modification shown in FIG.
  • the seat 18 or 18A may be arranged so as to extend along a quarter of the inner peripheral surface of the stator core 7. Further, as in the fourth modification shown in FIG. 11, for example, the seat 18 or 18A may be arranged along the half of the inner peripheral surface of the stator core 7. Further, as in the fifth modification shown in FIG. 12, for example, the seat 18 or 18A may be arranged along the three quarters of the inner peripheral surface of the stator core 7. Then, while moving the sheet 18 or 18A, the inner peripheral surface of the mixture 17 filled in the opening 11 of each slot 8 may be leveled. In these modifications, even if the inner diameter of the stator core 7 changes, it is possible to easily cope with the change.
  • the winding method of the quadrangular sheet 18 two opposite sides are in contact with each other, the first corner and the second corner are in contact, and the third corner and the fourth corner are in contact with each other.
  • the present invention is not limited to this and can be modified without departing from the spirit and technical idea of the present invention.
  • the sheet 18 or 18A may be wound obliquely so as not to do so. Thereby, even if the inner diameter of the stator core 7 is changed, it can be easily dealt with.
  • each slot 8 is filled with the mixture 17 from one axial side of the stator core 7, and the stator core 7 is inserted from each slot 8.
  • the case where the mixture 17 protruding to the other side in the axial direction is removed has been described as an example, but the present invention is not limited to this, and modifications can be made without departing from the spirit and technical idea of the present invention. Such a modified example will be described with reference to FIGS. 14 and 15.
  • FIG. 14 is a flowchart showing the procedure of the method for manufacturing the stator of the rotary electric machine according to this modification.
  • step S1 the insulating material 12A, the coil 9, and the insulating material 12B are inserted in that order into each slot 8 of the stator core 7, and they are fixed with a varnish or the like. Then, in step S6, for example, cylindrical jigs 19 are arranged on one side and the other side in the axial direction of the stator core 7, and the slots 8 are covered with these jigs 19 (see FIG. 15).
  • each slot 8 is filled from the inner peripheral side of the stator core 7 with the mixture 17 containing the magnetic powder 15 and the uncured or semi-cured resin 16. At this time, if the mixture 17 protrudes from each slot 8 to the inner peripheral side of the stator core 7, the mixture 17 protruding is removed.
  • step S2 the seat 18 or 18A is arranged along the inner peripheral surface of the stator core 7.
  • step S4 the inner peripheral surface of the mixture 17 filled in each slot 8 is leveled with the inner peripheral surface of the stator core 7 using the sheet 18 or 18A so as to have the same cylindrical side surface.
  • the resin 16 is cured by heating to form the magnetic wedge 14.
  • the inner peripheral surface of the magnetic wedge 14 can be evened so as to have the same cylindrical side surface as the inner peripheral surface of the stator core 7. As a result, it is possible to suppress the high-frequency magnetic flux from leaking from the stator 3 side to the rotor 2 side and improve the efficiency of the rotary electric machine. Further, by using the flexible sheet 18 or 18A, the inner peripheral surface of the magnetic wedge 14 can be easily leveled. Moreover, even if the inner diameter of the stator core 7 is changed, it can be easily dealt with.
  • a squirrel-cage induction motor (specifically, one including the rotor 2 having the conductor bar 6 and the end ring) has been described as an example of the rotary electric machine to which the present invention is applied, but the present invention is not limited to this. I can't. That is, the present invention may be applied to, for example, a permanent magnet synchronous motor (specifically, one including a rotor having a permanent magnet), or may be applied to a generator.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2019/020620 2018-12-13 2019-05-24 回転電機のステータの製造方法及び回転電機 WO2020121555A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980064686.1A CN112840540A (zh) 2018-12-13 2019-05-24 旋转电机的定子的制造方法和旋转电机
KR1020217006081A KR20210039423A (ko) 2018-12-13 2019-05-24 회전 전기 기기의 스테이터의 제조 방법 및 회전 전기 기기

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-233745 2018-12-13
JP2018233745A JP7057745B6 (ja) 2018-12-13 2018-12-13 回転電機のステータの製造方法及び回転電機

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WO2020121555A1 true WO2020121555A1 (ja) 2020-06-18

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JP (1) JP7057745B6 (ko)
KR (1) KR20210039423A (ko)
CN (1) CN112840540A (ko)
TW (1) TWI739145B (ko)
WO (1) WO2020121555A1 (ko)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022068051A (ja) * 2020-10-21 2022-05-09 株式会社日立産機システム 回転電機及び回転電機の製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126453A (ja) * 1984-07-13 1986-02-05 Toshiba Corp 磁性楔の成形法
JPH0670516A (ja) * 1992-08-20 1994-03-11 Toshiba Corp 回転電機用固定子の製造方法
JPH06253509A (ja) * 1993-02-25 1994-09-09 Toshiba Corp 回転電機の絶縁処理方法
WO2018008738A1 (ja) * 2016-07-08 2018-01-11 株式会社日立産機システム 回転電機及び回転電機の製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6343538A (ja) * 1986-08-06 1988-02-24 Matsushita Seiko Co Ltd モ−タの固定子
JP2004104986A (ja) * 2002-07-16 2004-04-02 Japan Servo Co Ltd 永久磁石形回転電機
JP6129966B2 (ja) * 2013-07-01 2017-05-17 株式会社日立産機システム 回転電機及びその製造方法
JP6253509B2 (ja) 2014-05-21 2017-12-27 オリンパス株式会社 画像表示方法、制御装置、顕微鏡システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126453A (ja) * 1984-07-13 1986-02-05 Toshiba Corp 磁性楔の成形法
JPH0670516A (ja) * 1992-08-20 1994-03-11 Toshiba Corp 回転電機用固定子の製造方法
JPH06253509A (ja) * 1993-02-25 1994-09-09 Toshiba Corp 回転電機の絶縁処理方法
WO2018008738A1 (ja) * 2016-07-08 2018-01-11 株式会社日立産機システム 回転電機及び回転電機の製造方法

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TWI739145B (zh) 2021-09-11
JP2020096468A (ja) 2020-06-18
JP7057745B2 (ja) 2022-04-20
TW202023148A (zh) 2020-06-16
KR20210039423A (ko) 2021-04-09
CN112840540A (zh) 2021-05-25
JP7057745B6 (ja) 2022-05-16

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