WO2022196193A1 - Moteur supraconducteur - Google Patents

Moteur supraconducteur Download PDF

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Publication number
WO2022196193A1
WO2022196193A1 PCT/JP2022/005036 JP2022005036W WO2022196193A1 WO 2022196193 A1 WO2022196193 A1 WO 2022196193A1 JP 2022005036 W JP2022005036 W JP 2022005036W WO 2022196193 A1 WO2022196193 A1 WO 2022196193A1
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WO
WIPO (PCT)
Prior art keywords
superconducting
coil
inner peripheral
container
rotor
Prior art date
Application number
PCT/JP2022/005036
Other languages
English (en)
Japanese (ja)
Inventor
海里 大丹生
康平 酒井
智明 虎谷
直之 児島
Original Assignee
古河電気工業株式会社
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 古河電気工業株式会社 filed Critical 古河電気工業株式会社
Publication of WO2022196193A1 publication Critical patent/WO2022196193A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
    • H02K55/02—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type

Definitions

  • the present invention relates to superconducting motors used as power sources for ships, railroads, vehicles, aircraft, etc., for example.
  • a conventional superconducting motor has a rotor that is rotatably supported, a stator core and superconducting coils, a stator arranged to face the rotor in the radial direction, a coil cooling means that cools the superconducting coils, is known (see, for example, Patent Document 1).
  • the coil cooling means of a conventional superconducting motor cools the stator core by circulating a cooling medium discharged from a refrigerator through narrow tubes formed to penetrate the stator core, and the cooled stator core heats the stator core. It cools the connected superconducting coils. Therefore, when the conventional superconducting motor is started, a large amount of cooling medium is consumed to cool the superconducting coil to the superconducting state, and it may take a long time to reach the superconducting state.
  • An object of the present invention is to provide a superconducting motor that can efficiently cool the superconducting coils at startup.
  • a superconducting motor includes a rotor that is rotatably supported, a stator core, and a plurality of superconducting coils.
  • a coil cooling container into which a cooling medium for cooling the superconducting coil flows; and a heat insulating container in which the stator core and the coil cooling container are accommodated.
  • a plurality of teeth arranged at intervals in the circumferential direction and protruding in the radial direction of the yoke portion, the coil cooling vessel extending inward from the outer surface, It has a plurality of insertion paths through which teeth are inserted, and the superconducting coil is wound around the outer periphery of the insertion paths inside the coil cooling container.
  • the stator is disposed radially outward of the rotor
  • the heat insulating container is formed in a tubular shape surrounding the outer peripheral side of the rotor, and is an outer peripheral side member located on the outer peripheral side. and an inner peripheral side member located on the inner peripheral side, the inner peripheral side member being formed of a non-magnetic and non-conductive material.
  • the coil cooling container is supported by the inner peripheral member.
  • the tooth portion is arranged radially inside the yoke portion, and the tip portion is supported by the inner peripheral member.
  • the teeth are separate from the yoke.
  • the present invention it is possible to cool only the superconducting coil without cooling the stator core by allowing the cooling medium to flow into the coil cooling container, so that the superconducting coil can be efficiently cooled at the time of start-up. becomes possible.
  • FIG. 1 is an overall perspective view of a superconducting motor according to one embodiment of the present invention
  • FIG. 1 is an exploded perspective view of a superconducting motor according to one embodiment of the present invention
  • FIG. 1 is a cross-sectional view of a superconducting motor according to one embodiment of the present invention
  • FIG. It is a figure explaining a method of assembling a superconducting motor concerning one embodiment of the present invention.
  • FIG. 1 is an overall perspective view of a superconducting motor
  • FIG. 2 is an exploded perspective view of the superconducting motor
  • FIG. 3 is a cross-sectional view of the superconducting motor
  • FIG. 4 is a diagram for explaining a method of assembling the superconducting motor.
  • the superconducting motor 1 of this embodiment is used as a power source for ships, railroads, vehicles, aircraft, and the like, for example.
  • the superconducting motor 1 includes a heat insulating container 10, a drive shaft 20 rotatably provided with respect to the heat insulating container 10, and a rotor 30 fixed to the outer peripheral portion of the drive shaft 20. and a stator 40 provided inside the heat insulating container 10, facing the rotor 30 on the radially outer side of the rotor 30, and a superconducting coil described later of the stator 40 are accommodated, and a cooling medium for cooling the superconducting coil is circulated.
  • a container 50 ;
  • the heat insulating container 10 includes a cylindrical outer member 11 located on the outer peripheral side, a cylindrical inner peripheral member 12 located on the inner peripheral side, and one axial end of the outer peripheral member 11 and the inner peripheral member 12. and a second lid member 14 that closes the other ends in the axial direction of the outer peripheral side member 11 and the inner peripheral side member 12 .
  • the inner peripheral side member 12 is provided on one end side of the inner peripheral cylindrical portion 12a extending between the first lid member 13 and the second lid member 14 and the inner peripheral cylindrical portion 12a. and a fitting portion 12b that fits into.
  • the heat-insulating container 10 has a cylindrical closed cylindrical space 10 a surrounded by an outer peripheral member 11 , an inner peripheral member 12 , a first lid member 13 and a second lid member 14 .
  • the heat-insulating container 10 evacuates the closed cylindrical space 10a to evacuate the closed cylindrical space 10a, thereby blocking heat transfer between the inside and the outside of the closed cylindrical space 10a.
  • the inner peripheral side member 12 is made of a non-magnetic and non-conductive material.
  • Non-magnetic and non-conductive materials include fiber-reinforced plastics such as GFRP, polyimide (PI), polyamide-imide (PAI), polybenzimidazole (PBI), polyetheretherketone (PEEK), and fluorine resin (PTFE). ), which can be used in a wide range of temperatures (especially low temperatures) such as super engineering plastics, ceramic processed products such as alumina, and glass materials.
  • the drive shaft 20 is arranged so as to extend in the axial direction on the inner peripheral side of the inner peripheral cylindrical portion 12 a of the inner peripheral side member 12 . It is rotatably supported, and the other end side is rotatably supported by a radially central portion of the second lid member 14 via a second bearing 22 .
  • the rotor 30 is provided on the outer peripheral portion of the drive shaft 20 on the axial center side, and has an outer diameter slightly smaller than the inner diameter of the inner peripheral cylindrical portion 12 a of the inner peripheral side member 12 .
  • the rotor 30 includes a rotor core 31 integrally formed by laminating a plurality of electromagnetic steel plates in the axial direction of the drive shaft 20 and by caulking, welding, or the like, and ferrite magnets, for example, arranged circumferentially around the outer periphery of the rotor core 31. and a plurality of permanent magnets 32 of .
  • the stator 40 has a stator core 41 housed in the closed cylindrical space 10a of the heat insulating container 10, and a plurality of superconducting coils 42 housed in a coolant circulation space (described later) of the coil cooling container 50.
  • the stator core 41 is constructed by integrally forming a plurality of laminated electromagnetic steel plates by caulking, welding, or the like.
  • the stator core 41 includes a yoke portion 41a formed in an annular shape, a plurality of tooth portions 41b projecting toward the center of the annular shape at intervals in the circumferential direction of the annular shape of the yoke portion 41a, have.
  • the stator core 41 has a yoke portion 41a and a plurality of teeth portions 41b that are separate from each other.
  • the tooth portion 41b of the coil cooling vessel 50 is supported by the outer peripheral portion of the inner peripheral cylindrical portion 12a of the inner peripheral side member 12 in a state of being inserted into an insertion passage, which will be described later.
  • the stator core 41 has a plurality of tooth portions 41b attached to the yoke portions 41a.
  • Each of the plurality of superconducting coils 42 is made of a wire made of, for example, a bismuth (Bi2)-based or yttrium (Y)-based superconducting material, and as shown in FIG. is wrapped around. As shown in FIG. 3, the plurality of superconducting coils 42 are arranged on the outer peripheral side of the tooth portion 41b via insertion passages of the coil cooling vessel 50, which will be described later.
  • the superconducting motor 1 of the present embodiment includes a concentrated winding stator 40 in which a superconducting coil 42 is concentratedly wound around each of a plurality of tooth portions 41b of a stator core 41 . Electricity flowing through the plurality of superconducting coils 42 is supplied from a current introducing portion 42 b provided in the second lid member 14 .
  • the coil cooling vessel 50 has a tubular external shape in which a tubular refrigerant circulation space 50a extending along the circumferential direction of the sealed tubular space 10a of the heat insulating vessel 10 is formed. and supported by the inner peripheral side member 12 of the heat insulating container 10 .
  • the refrigerant circulation space 50a is arranged at intervals with respect to each of the outer peripheral side member 11, the inner peripheral side member 12, the first lid member 13, and the second lid member 14. Heat transfer between the outside and the coolant flow space 50a is cut off.
  • the coil cooling vessels 50 are provided at intervals in the circumferential direction at substantially the central portion in the axial direction, and are formed so as to extend inward from the outer surface of the plurality of teeth 41 b of the stator core 41 . It has a plurality of insertion passages 50b through which each is inserted. In the present embodiment, the plurality of insertion passages 50b penetrate the coolant circulation space 50a to communicate the outer peripheral side and the inner peripheral side of the coil cooling vessel 50, respectively.
  • the coil cooling vessel 50 is formed integrally with the plurality of superconducting coils 42 by setting the superconducting coils 42 on the outer peripheral side of each of the plurality of insertion passages 50b in the process of forming the coolant circulation space 50a. .
  • a coolant inflow pipe 51 for inflowing a cooling medium is connected to the lower side of the outer peripheral surface of the coil cooling vessel 50, and a coolant outflow pipe 52 for flowing out the cooling medium is connected to the upper side of the outer peripheral surface.
  • a coolant inflow end 51 a of the coolant inflow pipe 51 into which the cooling medium flows and a coolant outflow end 52 a of the coolant outflow pipe 52 into which the cooling medium flows are respectively arranged on the second lid member 14 .
  • Liquid nitrogen is used as the cooling medium that flows into the coil cooling container 50.
  • the superconducting coil 42 housed in the coil cooling container 50 is cooled by the liquid nitrogen, and the nitrogen vaporized by cooling the superconducting coil 42 flows out of the coolant. It flows out from the end 52a.
  • the yoke portion 41a of the stator core 41 is assembled to the inner peripheral side member 12 of the heat insulating container 10. Then, as shown in FIG.
  • the coil cooling container 50 housing the superconducting coil 42 and the plurality of stator cores 41 are mounted on the inner peripheral member 12 and the yoke portion 41a.
  • the tooth portion 41b is assembled.
  • the tooth portion 41b is inserted into the insertion passage 50b.
  • the plurality of teeth 41b are supported by the inner cylindrical portion 12a and enter the inner circumference of the yoke 41a, and the yoke 41a and the plurality of teeth 41b are assembled. .
  • the first lid member 13 is attached to one end of the inner peripheral side member 12 as shown in FIG. 4(e).
  • the outer peripheral member 11 is fitted into the fitting portion 12b of the inner peripheral member 12 as shown in FIG. 4(f). together with the first lid member 13 .
  • the drive shaft 20 and the rotor 30 assembled together are inserted into the inner peripheral side of the inner cylindrical portion 12a of the inner peripheral member 12, as shown in FIG. 4(g).
  • one end side of the drive shaft 20 is supported by the first lid member 13 via the first bearing 21 .
  • the other ends of the outer peripheral member 11 and the inner peripheral member 12 are closed by the second cover member 14, and the other end of the drive shaft 20 is closed to the second end. It is supported by the second lid member 14 via the bearing 22 .
  • the superconducting motor 1 configured as described above is started, the superconducting coil 42 accommodated in the coil cooling container 50 is cooled by flowing a cooling medium into the coil cooling container 50 to bring it into a superconducting state. As a result, the superconducting motor 1 suppresses the occurrence of copper loss in the superconducting coil 42 during driving.
  • the coil cooling container 50 of the superconducting motor 1 accommodates only the superconducting coil 42 , and the stator core 41 is accommodated in the sealed cylindrical space 10 a outside the coil cooling container 50 . Therefore, the superconducting motor 1 of the present embodiment requires a small amount of cooling medium to be consumed until the superconducting coil 42 is brought into the superconducting state, and the superconducting coil 42 can be brought into the superconducting state in a short period of time. . Further, the superconducting motor 1 of the present embodiment suppresses an increase in iron loss due to cooling of the stator core 41 by the cooling medium during driving.
  • the inner peripheral side member 12 of the heat insulating container 10 is made of a non-magnetic and non-conductive material. Therefore, the superconducting motor 1 of the present embodiment suppresses an increase in eddy current loss caused by the magnetic flux lines interlinking with the conductive material without restricting the inflow of the magnetic flux lines between the rotor 30 and the stator 40. It becomes possible to
  • the inner peripheral side member 12 of the heat insulating container 10 supports the plurality of teeth 41b and the coil cooling container 50 respectively. Therefore, in the superconducting motor 1 of the present embodiment, the plurality of teeth 41b and the coil cooling container 50 do not come into direct contact with each other, and it is possible to suppress mutual heat transfer. It is possible to intensively cool only the superconducting coil 42 housed in the cooling container 50 .
  • the rotor 30 is rotatably supported, the stator core 41 and the plurality of superconducting coils 42 are arranged so as to face the rotor 30 in the radial direction.
  • a coil cooling container 50 into which a cooling medium for cooling the superconducting coil 42 flows; 41 has an annular yoke portion 41a and a plurality of tooth portions 41b arranged at intervals in the circumferential direction of the yoke portion 41a and protruding in the radial direction of the yoke portion 41a.
  • the superconducting coil 42 has a plurality of insertion passages 50b formed to extend inward from the outer surface and through which the tooth portions 41b are inserted. is turned.
  • the coil cooling vessel 50 since the coil cooling vessel 50 only needs to be large enough to accommodate only the superconducting coil 42, the required space is smaller than in the case of forming a cooling vessel that accommodates the stator core 41 and the superconducting coil 42. It is possible to reduce the size and weight of the device.
  • the stator 40 is disposed radially outward of the rotor 30, and the heat insulating container 10 is formed in a cylindrical shape surrounding the outer peripheral side of the rotor 30, and includes an outer peripheral member 11 positioned on the outer peripheral side and a It is preferable that the inner peripheral member 12 is made of a non-magnetic and non-conductive material.
  • the coil cooling container 50 is supported by the inner peripheral member 12 .
  • the tooth portion 41b be arranged radially inward of the yoke portion 41a and that the tip portion thereof be supported by the inner peripheral side member 12 .
  • stator 40 can be securely fixed in the sealed cylindrical space 10a of the heat insulating container 10 without requiring a special fixing structure for fixing the stator 40.
  • the tooth portion 41b be separate from the yoke portion 41a.
  • the stator core 41 and the superconducting coil 42 accommodated in the coil cooling container 50 can be easily rotated. can be assembled, it is possible to reduce the number of assembly man-hours.
  • the inner rotor type superconducting motor 1 is shown in which the rotor 30 having the permanent magnets 32 is arranged on the inner peripheral side and the stator 40 having the superconducting coils 42 is arranged on the outer peripheral side.
  • the present invention can also be applied to an outer rotor type superconducting motor in which a rotor having permanent magnets is arranged on the outer peripheral side and a stator having superconducting coils is arranged on the inner peripheral side.
  • liquid nitrogen is used as the cooling medium in the above embodiment, it is not limited to this, and liquid helium may be used as the cooling medium as long as the superconducting coil can be cooled. good.
  • the closed cylindrical space 10a is evacuated to form a vacuum heat insulating layer on the heat insulating container 10, but the present invention is not limited to this. If it is possible to block heat transfer between the outside and the inside of the coil cooling vessel, for example, the outside of the coil cooling vessel may be covered with a heat insulating material.
  • Reference Signs List 1 superconducting motor 10 heat insulation container 11 outer peripheral member 12 inner peripheral member 30 rotor 40 stator 41 stator core 41a yoke portion 41b tooth portion 42 superconducting coil 50 coil cooling container 50b insertion path

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superconductive Dynamoelectric Machines (AREA)

Abstract

La présente invention concerne un moteur supraconducteur qui peut refroidir efficacement une bobine supraconductrice au moment du démarrage.　Ce moteur supraconducteur comprend un stator 40 qui possède une bobine de stator 41 et de multiples bobines supraconductrices 42 et qui est disposé de manière à faire face au rotor 30 dans la direction radiale, un boîtier de refroidissement de bobines 50 dans lequel sont logées les bobines supraconductrices et dans lequel circule un agent de refroidissement pour refroidir les bobines supraconductrices 42, et un boîtier calorifugé 10 dans lequel sont logés le noyau de stator 41 et le boîtier de refroidissement de bobines 50, le noyau de stator 41 comprenant une culasse annulaire 41a et de multiples dents 41b qui sont disposées à intervalles dans la direction circonférentielle de la culasse 41a et qui font saillie dans la direction radiale de la culasse 41a ; le boîtier de refroidissement de bobines 50 comprenant de multiples passages d'insertion 50b qui sont formés pour s'étendre de la surface extérieure vers l'intérieur et dans lesquels les dents 41b sont insérées, et les bobines supraconductrices 42 étant enroulées autour du côté périphérique extérieur des passages d'insertion 50b sur l'intérieur du boîtier de refroidissement de bobines 50.
PCT/JP2022/005036 2021-03-18 2022-02-09 Moteur supraconducteur WO2022196193A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021044338A JP2022143687A (ja) 2021-03-18 2021-03-18 超電導モータ
JP2021-044338 2021-03-18

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WO2022196193A1 true WO2022196193A1 (fr) 2022-09-22

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PCT/JP2022/005036 WO2022196193A1 (fr) 2021-03-18 2022-02-09 Moteur supraconducteur

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4376266A1 (fr) * 2022-11-24 2024-05-29 GKN Aerospace Services Limited Machine électrique à enroulements litz d'induit cryoréfrigérés

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009170724A (ja) * 2008-01-17 2009-07-30 Sumitomo Electric Ind Ltd 超電導コイルの冷却容器
JP2011211881A (ja) * 2010-03-31 2011-10-20 Sumitomo Electric Ind Ltd リラクタンスモータ
JP2011244536A (ja) * 2010-05-14 2011-12-01 Toyota Motor Corp 超電導モータ
JP2016096701A (ja) * 2014-11-17 2016-05-26 ジャパンスーパーコンダクタテクノロジー株式会社 超電導回転電機
JP2016163378A (ja) * 2015-02-27 2016-09-05 株式会社明電舎 回転機の部材固定構造および部材固定方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009170724A (ja) * 2008-01-17 2009-07-30 Sumitomo Electric Ind Ltd 超電導コイルの冷却容器
JP2011211881A (ja) * 2010-03-31 2011-10-20 Sumitomo Electric Ind Ltd リラクタンスモータ
JP2011244536A (ja) * 2010-05-14 2011-12-01 Toyota Motor Corp 超電導モータ
JP2016096701A (ja) * 2014-11-17 2016-05-26 ジャパンスーパーコンダクタテクノロジー株式会社 超電導回転電機
JP2016163378A (ja) * 2015-02-27 2016-09-05 株式会社明電舎 回転機の部材固定構造および部材固定方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4376266A1 (fr) * 2022-11-24 2024-05-29 GKN Aerospace Services Limited Machine électrique à enroulements litz d'induit cryoréfrigérés
WO2024110756A1 (fr) * 2022-11-24 2024-05-30 Gkn Aerospace Services Limited Moteur électrique ayant des enroulements en fils de litz à armature cryo-refroidie

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Publication number Publication date
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