WO2016129017A1 - かご型回転電機およびその回転子ならびに回転子製造方法 - Google Patents

かご型回転電機およびその回転子ならびに回転子製造方法 Download PDF

Info

Publication number
WO2016129017A1
WO2016129017A1 PCT/JP2015/003801 JP2015003801W WO2016129017A1 WO 2016129017 A1 WO2016129017 A1 WO 2016129017A1 JP 2015003801 W JP2015003801 W JP 2015003801W WO 2016129017 A1 WO2016129017 A1 WO 2016129017A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
axial
rotor core
axial direction
hole
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.)
Ceased
Application number
PCT/JP2015/003801
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
直 若杉
真琴 松下
大輔 三須
活徳 竹内
寿郎 長谷部
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.)
Toshiba Corp
Toshiba Mitsubishi Electric Industrial Systems Corp
Original Assignee
Toshiba Corp
Toshiba Mitsubishi Electric Industrial Systems Corp
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 Toshiba Corp, Toshiba Mitsubishi Electric Industrial Systems Corp filed Critical Toshiba Corp
Priority to CN201580075748.0A priority Critical patent/CN107251383B/zh
Publication of WO2016129017A1 publication Critical patent/WO2016129017A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Definitions

  • the present invention relates to a cage-type rotating electrical machine, its rotor, and a method for manufacturing the rotor.
  • Aluminum die casting is a method in which a portion where a rotor bar is provided is a cavity, aluminum is poured into the cavity, and an aluminum cage is formed by casting. At this time, usually, the short-circuit ring is also integrally cast.
  • Patent Document 1 there is a technology for integrally forming the cage winding and end ring by pressurizing and filling copper fine powder into the hole for the rotor core cage winding and the end ring molding die.
  • Leakage inductance is reduced by narrowing the radial width of the bridge portion of the rotor bar, that is, the portion between the radially outer end of the rotor bar and the radially outer side of the rotor core. Therefore, the excitation current is reduced by narrowing this interval as much as possible to improve the efficiency.
  • an object of the present invention is to improve the efficiency of a cage rotating electric machine having a rotor bar.
  • a squirrel-cage rotating electrical machine includes a rotor shaft that is rotatably supported and extends in the axial direction about the rotation axis, and is fixed to the rotor shaft and spaced apart from each other in the circumferential direction.
  • a rotor core that is formed with an axial through hole and extends in the axial direction, and that extends in the axial direction near the radial surface of the rotor core and extends in the axial through hole.
  • a plurality of rotor bars that are provided so as to fill a space that leaves a tip portion in the radial direction, and ends on both sides outside the rotor core are electrically coupled to each other, and the axial direction of the rotor core
  • Spaced apart and circumferentially A stator core formed with a plurality of teeth that are arranged at intervals and extend in the axial direction and project inward in the radial direction; and a stator coil wound around the plurality of teeth. And a stator.
  • the rotor of the squirrel-cage electric machine includes a rotor shaft that is rotatably supported and extends in the axial direction about the rotation axis, and is fixed to the rotor shaft and spaced apart from each other in the circumferential direction.
  • a rotor core formed with an axial through-hole and extending in the axial direction, and a radial direction of the axial through-hole in the axial through-hole in the vicinity of the radial surface of the rotor core and extending in the axial direction
  • a plurality of rotor bars provided on both sides of the rotor core are provided so as to fill a space leaving the tip, and the ends on both sides outside the rotor core are electrically coupled to each other, and on both sides in the axial direction of the rotor core.
  • two annular short-circuit rings that are external and electrically coupled to any of the ends of the plurality of rotor bars.
  • the present invention also relates to a method of manufacturing a rotor of a squirrel-cage electric machine, wherein a tip end insertion member extending in the axial direction is set at a radial tip portion of an axial through hole formed in the rotor core.
  • a mold obtained by assembling and integrating the rotor iron core in which the axial through-hole is formed and the tip insertion member is set, and the mold at the end after the part insertion member setting step and the tip insertion member setting step
  • a mold dismantling step for removing the mold.
  • FIG. 2 is a horizontal partial cross-sectional view taken along line II-II in FIG. 1.
  • It is a flowchart which shows the procedure of the rotor manufacturing method which concerns on embodiment. It is the graph which compared the Joule loss for every frequency of the cage type rotary electric machine which concerns on embodiment, and the conventional cage type rotary electric machine. It is the graph which compared each total joule loss of the cage type rotary electric machine which concerns on embodiment, and the conventional cage type rotary electric machine.
  • FIG. 1 is a longitudinal sectional view showing a configuration of a squirrel-cage electric rotating machine according to an embodiment.
  • the cage rotating electric machine 100 includes a rotor 10, a stator 20, a bearing 31 and a frame 32.
  • the rotor 10 includes a rotor shaft 11, a rotor core 12, a rotor bar 13, a short-circuit ring (end ring) 14, and an end ring fan 15.
  • the rotor shaft 11 is rotatably supported by two bearings 31 and extends in the axial direction.
  • the rotor core 12 has a central opening formed through the rotor shaft 11 in the center, and has a cylindrical shape in which, for example, ferromagnetic silicon steel plates are laminated in the axial direction. Further, the rotor core 12 is formed with axial through holes 50 (FIG. 2) spaced from each other in the circumferential direction in the radial outside of the central opening and in the vicinity of the radially outer side of the rotor core 12. .
  • the rotor bar 13 is a conductor, and is provided in each of the axial through holes 50 formed in the rotor core 12.
  • the short-circuit ring 14 is an annular conductor that electrically connects the rotor bars 13 protruding from both axial ends of the rotor core 12.
  • the stator 20 has a stator core 21 and a stator coil 22.
  • the stator core 21 is mainly made of a ferromagnetic material, is provided on the radially outer side of the rotor core 12, and faces the rotor core 12 with a gap.
  • the stator coil 22 includes a conductor formed in the stator core 21 and extending in the axial direction and housed in a slot (not shown) and a connection portion outside the stator core 21.
  • the frame 32 accommodates the rotor core 12 and the stator 20.
  • the bearing 31 rotatably supports both axial sides of the rotor shaft 11.
  • the bearing 31 is stationary and fixed by a frame 32.
  • the end ring fan 15 is a fan formed integrally with the short ring 14 and agitates the cooling gas in the frame 32.
  • the heat generated in the frame 32 reaches the frame 32 by the cooling gas stirred by the end ring fan 15 and is transmitted to the air driven by the external fan 35 outside the frame 32 and discharged to the outside air.
  • FIG. 2 is a horizontal partial cross-sectional view taken along the line II-II in FIG.
  • the axial through-hole 50 formed in the rotor core 12 has a stepped portion extending in the radial direction and a rectangular portion 50a having a substantially rectangular cross-sectional shape and a radial tip portion 50b at the radial tip.
  • the radial front end portion 50b has a triangular cross-sectional shape that has the smallest distance from the outer periphery of the rotor core 12 at the center in the circumferential direction and has a vertex substantially on the outside in the radial direction.
  • tip part 50b is not limited to a triangle.
  • the distance from the outer periphery in the radial direction should be set as small as possible and the structural strength of the rotor core in this portion should be ensured. . Therefore, if both of these objectives can be achieved, for example, the cross-sectional shape of this portion may be a shape having an arc.
  • the rotor bar 13 is accommodated in the rectangular portion 50a. Specifically, a conductive metal is filled by casting using the rectangular portion 50a as a mold. Further, the distal end portion 50b is provided with a distal end insertion member 51 that is non-conductive and non-magnetic. When the rotor bar 13 is cast, the tip insertion member 51 is attached to the radial tip 50b.
  • the rotor bar 13 is not limited to a casting. That is, you may assemble by inserting the conductive metal stick
  • FIG. 3 is a flowchart showing the procedure of the rotor manufacturing method.
  • the distal end insertion member 51 is disposed at the radial distal end portion 50b that is the distal end portion of the rotor core 12 toward the radially outer side of the axial through hole 50 (step S01).
  • the distal end insertion member 51 is disposed at the radial distal end portion 50b, and the rotor core 12 in which the cavity for forming the rotor bar 13 is formed, and the molds at both ends, that is, the short-circuit ring 14 and the end
  • the mold of the ring fan 15 is assembled (step S02).
  • a conductor bar metal is poured into the rectangular portion 50a of the axial through hole 50 of the rotor core 12 and the molds at both ends (step S03).
  • the short-circuit ring 14 and the end ring fan 15 are formed at the end, and the space other than the portion where the radial tip 50b is provided in the axial through hole 50 of the rotor core 12 is for the conductor bar.
  • Filled with metal the conductor bar metal is a conductor material, for example, aluminum. Alternatively, copper may be used.
  • the molds at both ends are removed, and the surface of the cast part is finished (step S04).
  • parts other than the rotor 10 are manufactured and assembled into a squirrel-cage rotating electric machine (step S05).
  • the nonmagnetic and nonconductive tip insertion member 51 is provided at the radial tip 50b of the axial through hole 50, thereby suppressing the area of the rotor bar 13 from spreading near the rotor surface. is doing. Further, the radial tip 50b through which the leakage magnetic flux passes restricts the distance from the tip insertion member 51 to the radially outer surface of the rotor core 12. As a result, the total efficiency can be improved.
  • FIG. 4 is a graph comparing the Joule loss for each frequency of the car-type rotating electric machine according to the embodiment and the conventional car-type rotating electric machine.
  • the horizontal axis is the frequency order.
  • the order 1 is the fundamental frequency, that is, the power supply frequency.
  • the vertical axis is the loss due to the analysis result, and the unit is Joule (J).
  • J Joule
  • the conventional prototype is a prototype of a squirrel-cage electric machine in which the rotor bar 13 is also present in the conventional method, that is, the radial front end portion 50b of the axial through hole 50.
  • the improved machine is a squirrel-cage electric machine 100 having a tip insertion member 51 at a radial tip 50b of the axial through hole 50 according to the present embodiment.
  • the analysis results for each prototype show the rated specifications of 4P-132kW-400V-50Hz.
  • the improved machine When comparing the Joule loss at the order of each frequency of the conventional prototype and the improved machine, as shown in FIG. 4, the improved machine is about 88% and 10% compared to the conventional prototype, especially at the primary frequency. The Joule loss has been reduced.
  • FIG. 5 is a graph comparing the total joule loss of the car-type rotating electric machine according to the embodiment and the conventional car-type rotating electric machine. Comparing the total joule loss of the conventional prototype and the improved machine, as shown in FIG. 5, the improved machine has a joule loss of about 76%, that is, about 3/4 compared to the conventional prototype. It is falling.
  • the rotor bar 13 and the short-circuit ring 14 are integrally formed by injecting the metal for the conductor bar and casting, but the present invention is not limited to this.
  • the rotor bar 13 and the short-circuit ring 14 may be integrally formed by pressurizing and compacting a metal powder for a conductor bar in a system similar to casting.
  • the embodiments and the modifications thereof are included in the scope of the invention and the scope of the invention, and are also included in the invention described in the claims and the equivalents thereof.
  • SYMBOLS 10 Rotor, 11 ... Rotor shaft, 12 ... Rotor core, 13 ... Rotor bar, 14 ... Short-circuit ring, 15 ... End ring fan, 20 ... Stator, 21 ... Stator iron core, 22 ... Stator coil, DESCRIPTION OF SYMBOLS 31 ... Bearing, 32 ... Frame, 35 ... Outer fan, 50 ... Axial through-hole, 50a ... Rectangular part, 50b ... Radial tip part, 51 ... Tip part insertion member, 100 ... Cage type rotary electric machine

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Induction Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
PCT/JP2015/003801 2015-02-09 2015-07-29 かご型回転電機およびその回転子ならびに回転子製造方法 Ceased WO2016129017A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201580075748.0A CN107251383B (zh) 2015-02-09 2015-07-29 笼型旋转电机及其转子以及转子制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015023257A JP6383677B2 (ja) 2015-02-09 2015-02-09 かご型回転電機の回転子および回転子製造方法
JP2015-023257 2015-02-09

Publications (1)

Publication Number Publication Date
WO2016129017A1 true WO2016129017A1 (ja) 2016-08-18

Family

ID=56615535

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/003801 Ceased WO2016129017A1 (ja) 2015-02-09 2015-07-29 かご型回転電機およびその回転子ならびに回転子製造方法

Country Status (3)

Country Link
JP (1) JP6383677B2 (https=)
CN (1) CN107251383B (https=)
WO (1) WO2016129017A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115464140A (zh) * 2022-09-27 2022-12-13 天蔚蓝电驱动科技(江苏)有限公司 一种电机石墨烯导条及其制备方法和应用

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6848029B1 (ja) * 2019-10-08 2021-03-24 株式会社東芝 回転電機の回転子

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004007949A (ja) * 2002-03-27 2004-01-08 Honda Motor Co Ltd 誘導電動機のロータ
JP2010081675A (ja) * 2008-09-24 2010-04-08 Toshiba Corp かご型回転子及びその製造方法
CN102299602A (zh) * 2011-08-29 2011-12-28 骆文玲 自启动永磁同步电机转子
JP2014108005A (ja) * 2012-11-29 2014-06-09 Toyota Industries Corp 回転子、その回転子を備える誘導電動機、及び回転子の製造方法
US20140285050A1 (en) * 2011-12-19 2014-09-25 Baldor Electric Company Asymmetric Rotor for a Line Start Permanent Magnet Machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137571U (https=) * 1987-02-20 1988-09-09
JPH05161322A (ja) * 1991-12-02 1993-06-25 Mitsui High Tec Inc 回転子積層鉄心の製造方法
CN1243354A (zh) * 1998-07-28 2000-02-02 湖南省电力试验研究所 内置频敏变阻起动感应电动机
CN202309444U (zh) * 2011-10-31 2012-07-04 南阳防爆集团股份有限公司 高转矩超超高效铸铜转子三相异步电动机
JP2014195374A (ja) * 2013-03-29 2014-10-09 Mitsubishi Electric Corp 回転電機およびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004007949A (ja) * 2002-03-27 2004-01-08 Honda Motor Co Ltd 誘導電動機のロータ
JP2010081675A (ja) * 2008-09-24 2010-04-08 Toshiba Corp かご型回転子及びその製造方法
CN102299602A (zh) * 2011-08-29 2011-12-28 骆文玲 自启动永磁同步电机转子
US20140285050A1 (en) * 2011-12-19 2014-09-25 Baldor Electric Company Asymmetric Rotor for a Line Start Permanent Magnet Machine
JP2014108005A (ja) * 2012-11-29 2014-06-09 Toyota Industries Corp 回転子、その回転子を備える誘導電動機、及び回転子の製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115464140A (zh) * 2022-09-27 2022-12-13 天蔚蓝电驱动科技(江苏)有限公司 一种电机石墨烯导条及其制备方法和应用
CN115464140B (zh) * 2022-09-27 2023-06-27 天蔚蓝电驱动科技(江苏)有限公司 一种电机石墨烯导条及其制备方法和应用

Also Published As

Publication number Publication date
JP2016146715A (ja) 2016-08-12
JP6383677B2 (ja) 2018-08-29
CN107251383A (zh) 2017-10-13
CN107251383B (zh) 2019-07-23

Similar Documents

Publication Publication Date Title
CN105122613B (zh) 转子、磁阻机器以及转子的制造方法
CN109906545B (zh) 同步磁阻型旋转电机
JP6658627B2 (ja) 回転電機
JP5019451B2 (ja) 回転子
WO2018074561A1 (ja) 同期リラクタンス型回転電機
JP6538244B2 (ja) かご型回転電機
JP6383677B2 (ja) かご型回転電機の回転子および回転子製造方法
CN101087075A (zh) 定子部段及其装配方法
CN106849416A (zh) 电动机的转子
WO2019176107A1 (ja) 誘導電動機の回転子及び誘導電動機
JPWO2019008930A1 (ja) ステータおよびモータ
ITRN20080062A1 (it) Parte statorica di macchina elettrica a flusso assiale dotata di cave e procedimento di realizzazione di parte statorica di macchina elettrica a flusso assiale dotata di cave.
US10236733B2 (en) Magnetic mass for rotor, rotor manufacturing process and corresponding electrical machine
US2146588A (en) Permanent magnet structure
JP2016146715A5 (https=)
US20140354105A1 (en) Construction arrangement of a permanent magnet rotor for a generator
CN110571998A (zh) 用于永磁电机的定子及永磁电机
CN103595159B (zh) 一种定子永磁式双转子电机的双凸极双鼠笼外转子结构
CN108880157A (zh) 用于电机的转子，包括该转子的电机及制造转子的方法
JP6131722B2 (ja) 誘導モータ
CN105164902B (zh) 用于电动机的转子
JPWO2019244205A1 (ja) 誘導電動機の回転子、誘導電動機及び回転子の製造方法
JP7192488B2 (ja) モータ
WO2018220677A1 (ja) 回転電機の回転子及び回転電機
JP6380690B1 (ja) 回転子および回転電機

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: 15881893

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: 15881893

Country of ref document: EP

Kind code of ref document: A1