WO2017081945A1 - Machine électrique rotative - Google Patents

Machine électrique rotative Download PDF

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Publication number
WO2017081945A1
WO2017081945A1 PCT/JP2016/077923 JP2016077923W WO2017081945A1 WO 2017081945 A1 WO2017081945 A1 WO 2017081945A1 JP 2016077923 W JP2016077923 W JP 2016077923W WO 2017081945 A1 WO2017081945 A1 WO 2017081945A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
rotating electrical
electrical machine
cooler
stator
Prior art date
Application number
PCT/JP2016/077923
Other languages
English (en)
Japanese (ja)
Inventor
愼治 杉本
大祐 郡
伊藤　誠
Original Assignee
株式会社日立製作所
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 株式会社日立製作所 filed Critical 株式会社日立製作所
Publication of WO2017081945A1 publication Critical patent/WO2017081945A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/225—Heat pipes

Definitions

  • the present invention relates to a rotating electrical machine, and more particularly to a method for cooling a rotating electrical machine.
  • a rotary electric machine for industrial use such as a motor for a railway vehicle
  • a rotary electric machine having a fully enclosed structure is known in order to suppress a decrease in reliability due to the influence of the surrounding environment such as dust.
  • a cooling frame is provided on the outer peripheral side of the rotating electrical machine, a flow path through which the liquid refrigerant is circulated is provided in the cooling frame, and the liquid refrigerant is circulated through the flow path in the cooling frame by a pump provided outside the rotating electrical machine. Cool the rotating electrical machine.
  • the liquid refrigerant that has cooled the rotating electric machine is cooled by a cooler provided outside the rotating electric machine, and (2) the liquid refrigerant is caused to flow into the rotating electric machine by a pump provided outside the rotating electric machine.
  • the liquid refrigerant that has cooled the rotating electrical machine flows out of the rotating electrical machine and then cooled by a cooler provided outside the rotating electrical machine.
  • Patent Document 1 describes a cooling method using boiling / condensation of a liquid refrigerant.
  • liquid is boiled in a frame of a rotating electrical machine to form a gas, and the liquid refrigerant turned into a gas is cooled in a condensing unit outside the rotating electrical machine, condensed and returned to a liquid, and the liquid returned to a liquid
  • a method is described in which the refrigerant is circulated back to the frame of the rotating electrical machine and cooled.
  • An object of the present invention is to provide a rotary electric machine that is reduced in size while eliminating the conventional problems described above and maintaining high reliability.
  • a rotating electrical machine includes a stator having a stator winding formed on a stator core, a rotor that is disposed at a distance from the stator and is rotatably held, An inner frame that fixes the stator, an outer frame that is arranged to surround the inner frame, fixes the inner frame, and a cooling frame that is fixed to an outer surface of the inner frame and is integrated with the outer frame.
  • the second space is partitioned by the partition wall.
  • the present invention it is possible to suppress a decrease in reliability due to leakage of the liquid refrigerant from the joint of the pipes and improve the cooling performance of the rotating electrical machine, which can contribute to downsizing of the rotating electrical machine.
  • FIG. 1 is an axial sectional view of a rotating electrical machine 1 according to an embodiment of the present invention.
  • FIG. 1 shows a case where an induction motor is used, the effects of the present invention are the same in other rotating electrical machines.
  • the stator 2 of the rotating electrical machine 1 includes a stator core 4, a multiphase stator winding 5 wound around the stator core 4, and an inner frame 70 that holds the stator core 4 on its inner peripheral surface. It is composed of
  • the stator core 4 is fixed in the axial direction by a stator core presser plate 16 for holding the stator core 4.
  • the rotor 3 is composed of a rotor core 7, a shaft 8, and a bearing 10, and the bearing 10 is rotatably held.
  • the rotor 3 rotates clockwise and counterclockwise, and operates as an electric motor and a generator.
  • the bearing 10 is supported by an end bracket 9, and the end bracket 9 is fixed to the inner frame 70.
  • the rotor core 7 is fixed in the axial direction by a rotor core presser plate 15 for pressing the rotor core 7.
  • An outer frame 71 is fixed to the outer side of the inner frame 70 so as to fix the inner frame 70 on the inner side, and a space for enclosing the liquid refrigerant 11 is provided between the inner frame 70 and the outer frame 71. It has been.
  • the inner frame 70 and the outer frame 71 are defined as a cooling frame 72.
  • the cooling frame 72 is an inner frame 70 and an outer frame 71 on the surface opposite to the stator 2 side of the inner frame 70.
  • the inside of the upper cooling frame 71 in FIG. 1 is cooled by outside air.
  • the cooling frame 72 accommodates the cooler 73 fixed to the inner surface of the cooling frame 72 and the two partition walls 20 arranged so as to sandwich the stator core 4 in the axial direction.
  • the cooling frame 72 includes the boiling portion 21 having a space serving as a passage for guiding the gas generated by boiling and vaporization of the liquid refrigerant 11 due to the heat inside the rotating electrical machine 1 to the cooler 73 and the liquid refrigerant 11 that has become gas.
  • the cooler 73 separates the liquid refrigerant 11 that has been condensed and liquefied and returned to the liquid into a condensing part 22 having a space that serves as a passage that leads to the cooler 73 by the partition wall 20. .
  • the circulation path of the liquid refrigerant 11 sealed between the inner frame 70 and the outer frame 71 will be described with reference to FIG.
  • FIG. 2 shows a cross section of the inner frame 70 and the outer frame 71, and the rotating electrical machine 1 is not shown.
  • Heat is transferred to the liquid refrigerant 11 through the inner frame 70 by the heat generated by the stator winding 5 and the stator core 4 inside the rotating electrical machine 1 at the boiling portion 21 divided by the partition wall 20 in the cooling frame 72.
  • the liquid refrigerant 11 that has received heat boils and vaporizes as the temperature rises.
  • the vaporized liquid refrigerant 11 moves upward in the direction of gravity, and moves from the gas inlet 23 provided in the cooling frame 72 to the cooler 73.
  • the liquid refrigerant 11 cooled by the cooler 73 becomes liquid by condensing.
  • the liquid refrigerant 11 that has become liquid returns to the cooling frame 72 from the liquid outlet 24 provided in the cooling frame 72.
  • the stator core 4 is returned to the outside in the axial direction by the partition wall 20 divided so as to sandwich the stator core 4 in the axial direction.
  • the feature is that the boiling part 21 of the liquid refrigerant 11 and the condensing part 22 returning from the cooler 73 are separated by the partition wall 20.
  • the liquid refrigerant 11 enclosed in the cooling frame 72 repeats the phenomenon of boiling / condensing, and thereby circulates in the cooling frame 72, thereby improving the cooling performance of the rotating electrical machine 1, and further cooling Since the frame 72 and the cooler 73 are integrally configured, the piping is not used, so that the leakage of the liquid refrigerant 11 can be prevented and reliability can be ensured.
  • FIG. 3 is an axial sectional view of the rotating electrical machine 1 according to the second embodiment of the present invention.
  • the difference from FIG. 1 is that the surface 81 under the gravity of the cooler 73 is inclined.
  • the liquid refrigerant 11 becomes a gas from the boiling part 21 and enters the cooler 73.
  • the cooled liquid refrigerant 11 is condensed by the cooler 73, becomes liquid, and adheres to the inner wall of the cooler 73.
  • the adhering liquid refrigerant 11 falls downward in accordance with gravity.
  • the dropped liquid refrigerant 11 adheres to the surface 81 under the gravity of the cooler 73.
  • the gravity lower surface 81 of the cooler 73 is inclined, it falls to the inclined gravity lower side.
  • the direction of the inclination is preferably the direction of the condensing unit 22, and reaches the condensing unit 22 according to the inclined surface.
  • FIG. 4 is an axial sectional view of the rotating electrical machine 1 according to the third embodiment of the present invention.
  • the difference from FIG. 1 is that fins 74 are provided on the outer surface of the cooler 73.
  • the liquid refrigerant 11 becomes a gas from the boiling part 21 and enters the cooler 73.
  • the fins 74 are provided in the cooler 73, the heat transfer area of the cooler 73 is increased, so that the cooling effect of the cooler 73 is increased and the liquid refrigerant 11 that has become gas is easily cooled.
  • the condensing action of the liquid refrigerant 11 is promoted, and the amount of the liquid refrigerant 11 that becomes liquid increases.
  • the cooling effect of the cooling frame 72 becomes high, and the rotary electric machine 1 can be reduced in size.
  • FIG. 5 is an axial sectional view of the rotating electrical machine 1 according to the fourth embodiment of the present invention.
  • the difference from FIG. 1 is that a fin 76 inside the cooler 73 is provided inside the cooler 73.
  • the liquid refrigerant 11 becomes a gas from the boiling part 21 and enters the cooler 73.
  • the fin 76 on the inner side of the cooler 73 is provided inside the cooler 73, the cooling effect of the cooler 73 is increased by increasing the heat transfer area of the cooler 73, and the liquid that has become a gas Since the refrigerant 11 is easily cooled, the condensing action of the liquid refrigerant 11 is promoted, and the amount of the liquid refrigerant 11 that becomes liquid increases. Thereby, the cooling effect of the cooling frame 72 becomes high, and the rotary electric machine 1 can be reduced in size.
  • FIG. 6 is an axial sectional view of a cooling frame 72 according to a fifth embodiment of the present invention.
  • the difference from FIG. 1 is that an inner frame fin 75 is provided on the outer peripheral side of the inner frame 70.
  • heat is transferred to the cooling frame 72 by the heat generation of the stator core 4 and the stator winding 5. Since the fins 75 of the inner frame are provided on the outer peripheral side of the inner frame 70 of the cooling frame 72 at this time, the heat transfer amount between the inner frame 70 and the liquid refrigerant 11 is increased by increasing the area of the outer peripheral surface of the inner frame 70. Will increase. Thereby, the cooling effect of the cooling frame 72 becomes high, and the rotary electric machine 1 can be reduced in size.
  • FIG. 7 is an axial sectional view of a cooling frame 72 according to the sixth embodiment of the present invention.
  • the difference from FIG. 2 is that a check valve 77 is provided in the passage between the cooler 73 and the boiling unit 21 and the condensing unit 22.
  • the temperature of the liquid refrigerant 11 in the boiling part 21 is increased, and when boiling, the pressure in the boiling part 21 is increased, the check valve 77 is opened, and the cooler 73 is entered.
  • the liquid refrigerant 11 cooled by the cooler 73 is condensed and becomes a liquid.
  • the check valve 77 is provided in the boiling part 21, the liquid refrigerant 11 does not return to the boiling part 21.
  • the check valve of the condensing unit 22 is opened, so that the liquid refrigerant 11 that has become liquid enters the condensing unit 22.
  • the circulation of the liquid refrigerant 11 between the boiling unit 21 and the boiling unit 22 and the cooler 73 is facilitated, the cooling effect of the cooling frame 72 is increased, and the rotating electrical machine 1 can be downsized.
  • FIG. 8 is a circumferential sectional view of a cooling frame 72 according to a seventh embodiment of the present invention.
  • the stator iron core 4 embodiment is characterized in that fins 78 on the inner surface of the outer frame are provided.
  • FIG. 9 is a circumferential sectional view of a cooling frame 72 according to an eighth embodiment of the present invention.
  • the cooling frame 72 is shown in FIG. 9, and other components are not shown.
  • a difference from FIG. 8 is that a fin 79 on the outer surface of the outer frame is provided.
  • the cooling effect of the cooling frame 72 is increased, and the rotating electrical machine 1 can be downsized.
  • FIG. 10 is a sectional view in the axial direction of the rotating electrical machine 1 according to the ninth embodiment of the present invention.
  • a difference from FIG. 1 is that a fan 80 is directly connected to the shaft 8.
  • the fan 80 since the fan 80 is directly connected to the shaft 8, the fan 80 rotates with the rotation of the rotor 3 of the rotating electrical machine 1. Thereby, since the wind produced by the fan 80 strikes the surface of the cooler 73, the cooling effect of the cooler 73 is enhanced, and the rotating electrical machine 1 can be downsized.
  • FIG. 11 is a block diagram of a railway vehicle equipped with a rotating electrical machine according to the tenth embodiment of the present invention.
  • the railway vehicle 200 includes a rotating electric machine 1, a speed increasing gear 202, and a wheel 203 on a carriage 201, and the rotating electric machine 1 drives the wheel 203 via the speed increasing gear 202.
  • a rotating electric machine 1 drives the wheel 203 via the speed increasing gear 202.
  • the rotating electric machine has been described as being used for driving the wheels of a railway vehicle.
  • the rotating electric machine can be used in a drive device for an electric construction machine and any other drive device.
  • the rotating electrical machine if the rotating electrical machine is applied to an electric vehicle, particularly a railway vehicle, the rotating electrical machine can be reduced in size, so that a railway vehicle having a large output can be provided.
  • the rotating electrical machine when the rotating electrical machine is applied to an electric vehicle, particularly a railway vehicle, it is possible to apply wind to the rotating electrical machine 1 by moving the railway vehicle 200 on which the rotating electrical machine 1 is mounted.
  • the rotating electrical machine 1 can be efficiently cooled.
  • the rotary electric machine 1 can be reduced in size.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne une machine électrique rotative qui est équipée : d'un stator comportant un enroulement de stator formé sur un noyau de stator ; d'un rotor disposé à une certaine distance du stator et supporté de manière à pouvoir tourner ; d'un cadre intérieur fixant le stator ; d'un cadre extérieur entourant le cadre intérieur, et fixant le cadre intérieur ; d'un cadre de refroidissement fixé à la surface extérieure du cadre intérieur, et faisant corps avec le cadre extérieur ; et d'une zone dans laquelle un milieu de refroidissement est enfermé hermétiquement entre le cadre intérieur et le cadre extérieur, et qui communique avec l'intérieur du cadre de refroidissement. Le cadre de refroidissement loge un dispositif de refroidissement fixé à la surface intérieure du cadre de refroidissement, et loge deux cloisons de séparation disposées de façon à prendre en sandwich entre elles, dans la direction axiale, le noyau de stator. L'intérieur du cadre de refroidissement est divisé par les cloisons de séparation en un premier espace qui sert de passage pour diriger un gaz, qui a été produit par ébullition/évaporation de l'agent de refroidissement liquide dans la zone susmentionnée sous l'effet de la chaleur, vers le dispositif de refroidissement, et un second espace qui sert de passage pour diriger et renvoyer l'agent de refroidissement liquide, qui est retourné à l'état liquide par condensation/liquéfaction du gaz au moyen du dispositif de refroidissement, vers la zone susmentionnée.
PCT/JP2016/077923 2015-11-13 2016-09-23 Machine électrique rotative WO2017081945A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-222584 2015-11-13
JP2015222584A JP2019024275A (ja) 2015-11-13 2015-11-13 回転電機

Publications (1)

Publication Number Publication Date
WO2017081945A1 true WO2017081945A1 (fr) 2017-05-18

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PCT/JP2016/077923 WO2017081945A1 (fr) 2015-11-13 2016-09-23 Machine électrique rotative

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JP (1) JP2019024275A (fr)
WO (1) WO2017081945A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113178989B (zh) * 2021-04-28 2022-10-21 哈尔滨工业大学 一种蒸发冷却电机
WO2023074611A1 (fr) * 2021-10-29 2023-05-04 ニデック株式会社 Structure de refroidissement et moteur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52115801U (fr) * 1976-02-27 1977-09-02
JPH052574U (ja) * 1991-02-27 1993-01-14 新明和工業株式会社 モータの冷却装置
JP2007049850A (ja) * 2005-08-11 2007-02-22 Toshiba Corp 液冷式回転電機
JP2015136265A (ja) * 2014-01-20 2015-07-27 株式会社日立製作所 回転電機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52115801U (fr) * 1976-02-27 1977-09-02
JPH052574U (ja) * 1991-02-27 1993-01-14 新明和工業株式会社 モータの冷却装置
JP2007049850A (ja) * 2005-08-11 2007-02-22 Toshiba Corp 液冷式回転電機
JP2015136265A (ja) * 2014-01-20 2015-07-27 株式会社日立製作所 回転電機

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