WO2021161588A1 - 回転電機の冷却構造 - Google Patents

回転電機の冷却構造 Download PDF

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Publication number
WO2021161588A1
WO2021161588A1 PCT/JP2020/039500 JP2020039500W WO2021161588A1 WO 2021161588 A1 WO2021161588 A1 WO 2021161588A1 JP 2020039500 W JP2020039500 W JP 2020039500W WO 2021161588 A1 WO2021161588 A1 WO 2021161588A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
electric machine
rotary electric
cooling structure
stator
Prior art date
Application number
PCT/JP2020/039500
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
拓 植松
洸太 塩谷
Original Assignee
株式会社明電舎
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 株式会社明電舎 filed Critical 株式会社明電舎
Priority to JP2020563736A priority Critical patent/JP6930671B1/ja
Priority to CN202080096025.XA priority patent/CN115088164B/zh
Publication of WO2021161588A1 publication Critical patent/WO2021161588A1/ja

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to a cooling structure of a rotary electric machine.
  • Rotating electric machines especially in-vehicle rotating electric machines, have a cooling structure using a refrigerant such as cooling oil as a measure against heat generation.
  • a refrigerant such as cooling oil
  • Examples of the cooling structure include a method of injecting a refrigerant from above the coil end of the stator from the outer diameter direction of the coil end (Patent Documents 1 and 2).
  • the cooling oil is injected from the upper part of the stator coil to the coil end, the cooling oil is applied to a desired part of the coil end due to the fluctuation of the discharge amount of the cooling oil and the inclination angle of the vehicle. It may not be possible to supply. Further, depending on the landing position of the cooling oil, the oil transmission efficiency to the desired portion may decrease.
  • one aspect of the present invention is a rotary electric machine having a frame for accommodating the stator of the rotary electric machine and a refrigerant into which the refrigerant flows, and a refrigerant guide member capable of supplying the refrigerant to a specific portion of the coil end of the stator. It is a cooling structure.
  • the refrigerant guide members are provided in pairs symmetrically in the direction of gravity in the vicinity of the coil end.
  • the refrigerant guide member is fixed to both ends of the bus ring of the coil end.
  • the refrigerant guide member in the cooling structure of the rotary electric machine, has a plate-shaped guide main body portion that receives the refrigerant and supplies the specific portion, and the guide main body portion at one end of the bus ring. It is provided with a fixing portion for fixing.
  • the refrigerant guide member is made of resin.
  • FIG. 3 is a perspective view of a bus ring having a refrigerant guide member having a cooling structure.
  • the rotary electric machine 1 to which the cooling structure of one aspect of the present invention exemplified in FIG. 1 is applied is mounted on a vehicle, for example, and has a rotary shaft 2, a rotor 3, a stator 4, a frame 5, and a refrigerant guide member 6. Be prepared.
  • the rotating shaft 2 is rotatably supported in the frame 5 via bearings (not shown).
  • the rotor 3 is fixed to the outer peripheral portion of the rotating shaft 2 in the frame 5.
  • the stator 4 is fixed in the frame 5 coaxially with the rotating shaft 2 and the rotor 3 so that an air gap with the outer peripheral portion of the rotor 3 is secured.
  • the stator 4 includes a stator core 41 and a stator coil 42.
  • the stator coil 42 is composed of a plurality of segment coils (not shown) wound around the stator core 41. A part of the stator coil 42 projects as coil ends 42A and 42B from the ends of the stator core 41 on the anti-direct connection side and the direct connection side of the rotary electric machine 1.
  • a bus bar (not shown) is connected to the stator coil 42 via a bus ring 9.
  • the bus ring 9 is arranged along the outer circumference of the stator 4, and conducts the stator coils 42 of the same phase (U phase, V phase, or W phase).
  • the three-phase bus rings 9 are bundled in an arc shape from the mold portion 91 as shown in FIG. 4, and are arranged around the coil end 42A as shown in FIGS. 1 and 2.
  • the opening of the frame 5 on the directly connected side is sealed by the bracket 11.
  • the opening on the anti-direct connection side of the frame 5 is also sealed by a bracket (not shown).
  • a refrigerant introduction path 50, a first inflow hole 51, and a second inflow hole 52 are formed on the outer surface of the frame 5.
  • the refrigerant introduction path 50 is formed substantially parallel to the axial direction of the rotary electric machine 1 (rotary shaft 2, rotor 3 and stator 4), and a refrigerant (for example, cooling oil) is supplied from the outside.
  • the first inflow hole 51 is formed along the radial direction of the frame 5 on the anti-direct connection side and the direct connection side, and allows the refrigerant in the refrigerant introduction path 50 to flow into the frame 5.
  • the second inflow holes 52 are formed in pairs symmetrically with the first inflow holes 51, and the refrigerant in the refrigerant introduction path 50 flows into the frame 5 along the outer peripheral direction of the coil end 42A.
  • the refrigerant guide members 6 are arranged in pairs symmetrically in the direction of gravity in the vicinity of the coil end 42A of the stator 4, and the refrigerant flowing into the frame 5 is a desired specific portion in the coil end 42A. Supply to.
  • the refrigerant guide member 6 is fixed to both ends of the bus ring 9 as shown in FIG.
  • the refrigerant guide member 6 is made of a well-known resin having refrigerant resistance (for example, oil resistance), and integrally includes a guide main body portion 61 and a fixing portion 62.
  • the guide main body 61 has a plate shape, receives refrigerant from the second inflow hole 52 of the frame 5, and supplies the refrigerant to a specific portion of the coil end 42A.
  • the guide main body 61 is provided on the outer surface of the fixing portion 62 in the tangential direction of the arc including one end of the arc of the bus ring 9.
  • the fixing portion 62 fixes the guide main body portion 61 to one end of the bus ring 9.
  • the fixing portion 62 is formed so that it can be divided, for example, at the stage of attachment work to the one end.
  • the refrigerant in the refrigerant introduction path 50 of the frame 5 flows into the frame 5 through the first inflow hole 51 and the second inflow hole 52.
  • the refrigerant flowing in from the first inflow hole 51 is supplied to the uppermost portion of the coil end 42A by gravity flow.
  • the refrigerant flowing in from the second inflow hole 52 comes into contact with the guide main body 61 of the refrigerant guide member 6, it is guided to the lower end of the guide main body 61 along the surface of the guide main body 61, and the specific portion of the coil end 42A ( For example, the portion near both ends of the bus ring 9) is provided.
  • the coil end 42A is cooled as described above.
  • the specific portion of the coil end 42A is cooled by the guidance of the refrigerant by the refrigerant guide member 6.
  • the coil end 42B in the frame 5 on the directly connected side is also cooled by the refrigerant provided from the refrigerant introduction path 50 through the first inflow hole 51 and the second inflow hole 52.
  • the refrigerant used for cooling the coil ends 42A and 42B is discharged from the discharge port 53 of the frame 5.
  • the refrigerant introduced into the frame 5 is supplied to the coil ends 42A and 42B in the frame 5.
  • a specific portion of the coil end 42A is cooled. Therefore, it is possible to prevent a decrease in the refrigerant transmission efficiency to a specific portion of the coil end 42A regardless of the fluctuation of the refrigerant discharge amount and the vehicle inclination angle.
  • the cooling performance of the stator coil 42 is improved, and the size, weight, and cost of the rotary electric machine can be reduced.
  • the refrigerant can be evenly supplied to a symmetrical specific portion of the coil end 42A.
  • the refrigerant guide member 6 is fixed to both ends of the bus ring 9, the refrigerant guide member 6 is positioned, so that the symmetrical installation becomes easy.
  • the guide main body 61 of the refrigerant guide member 6 is integrally provided with the fixing portion 62, it can be mounted on the bus ring 9 without the need for an attachment, and the manufacturing cost can be reduced.
  • the refrigerant guide member 6 is made of resin, the refrigerant guide member 6 can be formed in an arbitrary form according to the mode of the bus ring 9.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
PCT/JP2020/039500 2020-02-10 2020-10-21 回転電機の冷却構造 WO2021161588A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020563736A JP6930671B1 (ja) 2020-02-10 2020-10-21 回転電機の冷却構造
CN202080096025.XA CN115088164B (zh) 2020-02-10 2020-10-21 旋转电机的冷却结构

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020020284 2020-02-10
JP2020-020284 2020-02-10

Publications (1)

Publication Number Publication Date
WO2021161588A1 true WO2021161588A1 (ja) 2021-08-19

Family

ID=77292239

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/039500 WO2021161588A1 (ja) 2020-02-10 2020-10-21 回転電機の冷却構造

Country Status (3)

Country Link
JP (1) JP6930671B1 (zh)
CN (1) CN115088164B (zh)
WO (1) WO2021161588A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015130719A (ja) * 2014-01-06 2015-07-16 トヨタ自動車株式会社 モータの冷却構造
JP2017046455A (ja) * 2015-08-26 2017-03-02 三菱電機株式会社 回転電機
US20170271957A1 (en) * 2016-03-17 2017-09-21 Ford Global Technologies, Llc Electric Machine for Vehicle
JP2019041487A (ja) * 2017-08-25 2019-03-14 株式会社明電舎 回転電機の固定子の冷却構造
JP2019080416A (ja) * 2017-10-24 2019-05-23 トヨタ自動車株式会社 電気自動車を駆動するモータ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006115651A (ja) * 2004-10-18 2006-04-27 Toyota Motor Corp 回転電機の冷却装置
SE538876C2 (sv) * 2015-05-07 2017-01-17 BAE Systems Hägglunds AB Förfarande och system för kylning av en elmotor
JP2018033197A (ja) * 2016-08-22 2018-03-01 株式会社豊田自動織機 インバータ一体形回転電機
JP6500878B2 (ja) * 2016-11-16 2019-04-17 トヨタ自動車株式会社 回転電機の冷却構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015130719A (ja) * 2014-01-06 2015-07-16 トヨタ自動車株式会社 モータの冷却構造
JP2017046455A (ja) * 2015-08-26 2017-03-02 三菱電機株式会社 回転電機
US20170271957A1 (en) * 2016-03-17 2017-09-21 Ford Global Technologies, Llc Electric Machine for Vehicle
JP2019041487A (ja) * 2017-08-25 2019-03-14 株式会社明電舎 回転電機の固定子の冷却構造
JP2019080416A (ja) * 2017-10-24 2019-05-23 トヨタ自動車株式会社 電気自動車を駆動するモータ

Also Published As

Publication number Publication date
JPWO2021161588A1 (zh) 2021-08-19
CN115088164A (zh) 2022-09-20
JP6930671B1 (ja) 2021-09-01
CN115088164B (zh) 2023-05-26

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