WO2022180875A1 - Machine électrique tournante et dispositif d'entraînement - Google Patents

Machine électrique tournante et dispositif d'entraînement Download PDF

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Publication number
WO2022180875A1
WO2022180875A1 PCT/JP2021/022349 JP2021022349W WO2022180875A1 WO 2022180875 A1 WO2022180875 A1 WO 2022180875A1 JP 2021022349 W JP2021022349 W JP 2021022349W WO 2022180875 A1 WO2022180875 A1 WO 2022180875A1
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WO
WIPO (PCT)
Prior art keywords
shaft
electric machine
threaded portion
rotor
rotating
Prior art date
Application number
PCT/JP2021/022349
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English (en)
Japanese (ja)
Inventor
亮磨 佐々木
茂 前田
Original Assignee
日本電産株式会社
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 日本電産株式会社 filed Critical 日本電産株式会社
Publication of WO2022180875A1 publication Critical patent/WO2022180875A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • 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

Definitions

  • the present invention relates to a rotating electric machine and a driving device.
  • An electric motor that includes a rotor having a rotating shaft and a stator in which the rotor is arranged and that rotates the rotor by a rotating magnetic field (see, for example, Patent Document 1).
  • the rotor of the electric motor described in Patent Document 1 has a hollow rotating shaft. By circulating a coolant such as cooling oil in the rotating shaft, it is possible to suppress the temperature rise of the rotor.
  • An object of the present invention is to provide a rotating electric machine and a driving device that improve cooling efficiency for the rotor and stator.
  • a rotor having a shaft in which a coolant can flow and rotatable around the shaft; a stator positioned radially outward of the rotor,
  • the shaft is a cylindrical shaft body having a first threaded portion provided on an inner peripheral surface and a plurality of first side holes penetrating in a radial direction;
  • a cylindrical body having a second threaded portion provided on the outer peripheral surface and a plurality of second side holes penetrating in the radial direction, By rotating the second threaded portion to fit the first threaded portion, the plurality of second side holes are aligned with the plurality of second side holes in a mounting state in which the cylindrical body is mounted on one side of the shaft body in the axial direction.
  • the plurality of first side holes and the plurality of second side holes are connected via between the first screw portion and the second screw portion, and function as a flow path through which the refrigerant can pass.
  • One aspect of the drive device of the present invention is a drive device that is mounted on a vehicle and rotates an axle, The rotating electrical machine described above; a transmission device that is connected to the rotating electrical machine and that transmits rotation of the rotor to the axle; a housing that accommodates the rotating electric machine and the transmission device; and a coolant passage provided in the housing for supplying a coolant to the shaft and the stator of the rotating electric machine.
  • cooling efficiency for the rotor and stator is improved.
  • FIG. 1 is a schematic configuration diagram schematically showing a driving device according to one embodiment.
  • FIG. 2 is a longitudinal sectional view of a shaft that the rotor has.
  • FIG. 3 is an enlarged vertical cross-sectional view of a shaft that the rotor has.
  • FIG. 4 is an enlarged view of a region [A] surrounded by a dashed line in FIG.
  • FIG. 5 is a longitudinal sectional view showing the positional relationship between the shaft body and the cylindrical body in the rotor.
  • FIG. 6 is a longitudinal sectional view showing the positional relationship between the shaft body and the cylindrical body in the rotor.
  • FIG. 7 is a vertical cross-sectional perspective view of the shaft body.
  • FIG. 8 is a vertical cross-sectional perspective view of a cylindrical body.
  • the central axis J shown in the drawing as appropriate is a virtual axis extending in a direction intersecting the vertical direction.
  • the direction parallel to the central axis J is simply referred to as the "axial direction”
  • the radial direction about the central axis J is simply referred to as the "radial direction”
  • the circumferential direction about the central axis J is sometimes simply referred to as the "circumferential direction”.
  • the vertical direction, the horizontal direction, the upper side, and the lower side are names for simply explaining the relative positional relationship of each part, and the actual positional relationship, etc. are the positions indicated by these names. A layout relationship other than the relationship may be used.
  • the left side is called “upstream side” and the right side is called “downstream side”.
  • the “upstream side” corresponds to “one side in the axial (central axis J) direction”
  • the “downstream side” corresponds to “the other side in the axial (central axis J) direction”.
  • a driving device 100 of the present embodiment shown in FIG. 1 is mounted on a vehicle and rotates an axle 64 .
  • a vehicle in which drive device 100 is mounted is a vehicle using a motor as a power source, such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), an electric vehicle (EV), or the like.
  • HEV hybrid vehicle
  • PHY plug-in hybrid vehicle
  • EV electric vehicle
  • drive device 100 includes rotary electric machine 10 , housing 80 , transmission device 60 , and coolant channel 90 .
  • the rotary electric machine 10 includes a rotor 30 rotatable around a central axis (axis) J and a stator 40 located radially outside the rotor 30 .
  • the housing 80 accommodates the rotary electric machine 10 and the transmission device 60 .
  • Housing 80 has a motor housing 81 and a gear housing 82 .
  • Motor housing 81 is a housing that accommodates rotor 30 and stator 40 therein.
  • the motor housing 81 is connected to the right side of the gear housing 82 .
  • the motor housing 81 has a peripheral wall portion 81a, a partition wall portion 81b, and a lid portion 81c.
  • the peripheral wall portion 81a and the partition wall portion 81b are, for example, part of the same single member.
  • the lid portion 81c is separate from, for example, the peripheral wall portion 81a and the partition wall portion 81b.
  • the peripheral wall portion 81a has a tubular shape surrounding the central axis J and opening on the right side.
  • the partition wall portion 81b is connected to the left end portion of the peripheral wall portion 81a.
  • the partition wall portion 81b separates the interior of the motor housing 81 and the interior of the gear housing 82 in the axial direction.
  • the partition wall portion 81 b has a partition wall opening 81 d that connects the inside of the motor housing 81 and the inside of the gear housing 82 .
  • a bearing 34 is held in the partition portion 81b.
  • the lid portion 81c is fixed to the right end of the peripheral wall portion 81a.
  • the lid portion 81c closes the opening on the right side of the peripheral wall portion 81a.
  • a bearing 35 is held in the lid portion 81c.
  • the gear housing 82 accommodates the reduction gear 62 and the differential gear 63 of the transmission device 60 and the oil O inside.
  • the oil O is stored in the lower area inside the gear housing 82 .
  • the oil O circulates inside the coolant flow path 90 .
  • Oil O is used as a coolant for cooling rotating electric machine 10 .
  • the oil O is used as a lubricating oil for the reduction gear 62 and the differential gear 63 .
  • the oil O for example, it is preferable to use an oil equivalent to automatic transmission fluid (ATF), which has a relatively low viscosity, in order to function as a refrigerant and a lubricating oil.
  • ATF automatic transmission fluid
  • the transmission device 60 is connected to the rotating electric machine 10 and transmits the rotation of the rotor 30 to the axle 64 of the vehicle.
  • a transmission device 60 of the present embodiment has a reduction gear 62 connected to the rotating electric machine 10 and a differential gear 63 connected to the reduction gear 62 .
  • the differential gear 63 has a ring gear 63a. Torque output from the rotary electric machine 10 is transmitted to the ring gear 63 a via the reduction gear 62 .
  • a lower end portion of the ring gear 63 a is immersed in the oil O stored in the gear housing 82 .
  • the oil O is scooped up by the rotation of the ring gear 63a.
  • the scooped-up oil O is supplied as lubricating oil to, for example, the reduction gear 62 and the differential gear 63 .
  • the rotating electrical machine 10 is a part that drives the driving device 100 .
  • the rotating electrical machine 10 is positioned, for example, on the right side of the transmission device 60 .
  • the rotating electric machine 10 is a motor.
  • Torque of rotor 30 of rotating electric machine 10 is transmitted to transmission device 60 .
  • the rotor 30 has a shaft 1 extending axially around a central axis J and a rotor body 32 fixed to the shaft 1 .
  • the rotor main body 32 is composed of, for example, a plurality of rotor core portions fixed to the outer peripheral surface of the shaft 1 and arranged in the axial direction, and magnets and the like held in each rotor core portion.
  • the shaft 1 is rotatable around the central axis J. Thereby, the rotor 30 can rotate around the shaft 1 .
  • the shaft 1 is rotatably supported by bearings 34 and 35 .
  • the shaft 1 is a hollow shaft.
  • the shaft 1 has a cylindrical shape through which oil O as a coolant can flow.
  • the shaft 1 extends across the interior of the motor housing 81 and the interior of the gear housing 82 .
  • the left end of the shaft 1 protrudes inside the gear housing 82 .
  • a reduction gear 62 is connected to the left end of the shaft 1 .
  • the stator 40 is positioned radially outwardly of the rotor 30 with a gap therebetween.
  • the stator 40 surrounds the rotor 30 from the radially outer side along the entire circumference.
  • the stator 40 is fixed inside the motor housing 81 .
  • Stator 40 has a stator core 41 and a coil assembly 42 .
  • the stator core 41 has an annular shape surrounding the central axis J of the rotary electric machine 10 .
  • the stator core 41 is configured, for example, by laminating a plurality of plate members such as electromagnetic steel plates in the axial direction.
  • the coil assembly 42 has a plurality of coils 42c attached to the stator core 41 along the circumferential direction.
  • the plurality of coils 42c are attached to respective teeth (not shown) of the stator core 41 via insulators (not shown).
  • a plurality of coils 42c are arranged along the circumferential direction.
  • Coil 42c has a portion protruding from stator core 41 in the axial direction.
  • the coolant channel 90 is provided inside the housing 80 . Oil O as a coolant flows through the coolant channel 90 .
  • the coolant flow path 90 is provided across the inside of the motor housing 81 and the inside of the gear housing 82 .
  • the coolant flow path 90 is a path through which the oil O stored in the gear housing 82 is supplied to the rotating electric machine 10 in the motor housing 81 and returns to the gear housing 82 again.
  • a pump 71 and a cooler 72 are provided in the coolant channel 90 .
  • the coolant channel 90 includes a first channel portion 91 , a second channel portion 92 , a third channel portion 93 , a stator coolant supply portion 50 , a shaft channel portion 95 , and a connection channel portion 94 . , a radial channel portion 96 , an axial channel portion 98 , and a guide channel portion 97 .
  • the first flow path part 91, the second flow path part 92, and the third flow path part 93 are provided on the wall of the gear housing 82, for example.
  • the first flow path portion 91 connects a portion of the gear housing 82 where the oil O is stored and the pump 71 .
  • the second channel portion 92 connects the pump 71 and the cooler 72 .
  • the third flow path portion 93 connects the cooler 72 and the stator coolant supply portion 50 .
  • the third flow path portion 93 is connected to the left end portion of the stator coolant supply portion 50 , that is, the upstream portion of the stator coolant supply portion 50 .
  • a stator coolant supply unit 50 supplies oil O to the stator 40 .
  • the stator coolant supply portion 50 has a tubular shape extending in the axial direction.
  • the stator coolant supply portion 50 is a pipe extending in the axial direction. Both axial end portions of the stator coolant supply portion 50 are supported by the motor housing 81 .
  • a left end portion of the stator coolant supply portion 50 is supported by, for example, the partition portion 81b.
  • a right end portion of the stator coolant supply portion 50 is supported by, for example, the lid portion 81c.
  • the stator coolant supply portion 50 is positioned radially outward of the stator 40 .
  • the stator coolant supply section 50 is positioned above the stator 40 .
  • the stator coolant supply section 50 has a supply port 50a for supplying the oil O to the stator 40 .
  • the supply port 50 a is an injection port that injects part of the oil O that has flowed into the stator coolant supply portion 50 to the outside of the stator coolant supply portion 50 .
  • the supply port 50a is formed by a hole penetrating the wall portion of the stator coolant supply portion 50 from the inner peripheral surface to the outer peripheral surface.
  • a plurality of supply ports 50 a are provided in the stator coolant supply portion 50 .
  • the plurality of supply ports 50a are spaced apart from each other, for example, in the axial direction or the circumferential direction.
  • the shaft channel portion 95 is arranged inside the shaft 1 . Thereby, the oil O can be supplied into the shaft 1 .
  • the connection channel portion 94 connects the inside of the stator coolant supply portion 50 and the inside of the shaft 1 .
  • the connection channel portion 94 connects the right end portion of the stator coolant supply portion 50 , that is, the downstream portion, and the right end portion of the shaft channel portion 95 , that is, the upstream portion.
  • the connection channel portion 94 is provided, for example, in the lid portion 81c. According to this embodiment, it is possible to stably cool the stator 40 and the rotor 30 while simplifying the configuration of the coolant flow path 90 .
  • the axial channel portion 98 connects the radial channel portion 96 and the guide channel portion 97 .
  • the axial channel portion 98 is arranged over the interior of the plurality of rotor core portions.
  • the oil O stored in the gear housing 82 is sucked up through the first flow passage portion 91 and then through the second flow passage portion 92 into the cooler 72. flow into The oil O that has flowed into the cooler 72 is cooled in the cooler 72 and then flows through the third flow path portion 93 to the stator coolant supply portion 50 . A portion of the oil O that has flowed into the stator coolant supply portion 50 is injected from the supply port 50 a and supplied to the stator 40 . Another part of the oil O that has flowed into the stator coolant supply portion 50 flows into the shaft flow channel portion 95 through the connection flow channel portion 94 .
  • Another part of the oil O that has flowed into the shaft flow path portion 95 is discharged into the gear housing 82 through the left opening of the shaft 1 and is stored in the gear housing 82 again.
  • the oil O supplied to the stator 40 from the supply port 50 a takes heat from the stator 40
  • the oil O supplied to the rotor 30 and stator 40 from within the shaft 1 takes heat from the rotor 30 and stator 40 .
  • the oil O that has cooled the stator 40 and the rotor 30 drops downward and accumulates in the lower area inside the motor housing 81 .
  • the oil O accumulated in the lower region inside the motor housing 81 returns into the gear housing 82 through the partition wall opening 81d provided in the partition wall portion 81b.
  • coolant flow path 90 supplies oil O stored in gear housing 82 to rotor 30 and stator 40 .
  • the oil O can flow through the shaft 1. Then, when the rotor 30 rotates over a predetermined number of revolutions, the oil O is preferentially discharged from the coolant supply hole 33 by centrifugal force. At this time, in the shaft 1, the flow of the oil O along the direction of the central axis J is not ensured on the downstream side of the coolant supply hole 33, the cooling efficiency for the rotor 30 is lowered, and the lubricating oil for the bearing 35 is The amount of oil O supplied may decrease. Therefore, the rotating electric machine 10 is configured to be able to eliminate such problems. This configuration and operation will be described below.
  • the shaft 1 includes a shaft body 2 and a cylindrical body 5 inserted into the shaft body 2.
  • the shaft main body 2 is composed of a cylindrical member whose total length is longer than that of the cylindrical body 5.
  • the shaft body 2 has a first screw portion 21 and a first side hole 22.
  • the first threaded portion 21 is a female thread provided on the upstream side portion of the inner peripheral surface 231 of the shaft body 2 .
  • the first threaded portion 21 is provided from the opening on the upstream side of the shaft body 2 halfway in the central axis J direction.
  • the first side hole 22 is a through hole penetrating through the shaft body 2 in the radial direction. Further, the first side hole 22 opens to the first screw portion 21 inside the shaft body 2 . Also, a plurality of first side holes 22 are provided. Although the number of the first side holes 22 arranged is eight in this embodiment, it is not limited to this, and may be, for example, two to seven or nine or more. The eight first side holes 22 are arranged at equal angular intervals around the central axis J and at the same position in the central axis J direction.
  • the shaft body 2 has an outer diameter that varies along the direction of the central axis J, an upstream small-diameter portion 233 , a downstream small-diameter portion 234 , and a large diameter between the small-diameter portions 233 and 234 . and a diameter portion 235 .
  • a cylindrical body 5 is inserted into the upstream side of the shaft body 2 .
  • the cylindrical body 5 has a second screw portion 51 and a second side hole 52.
  • the second screw portion 51 is a male screw provided on the outer peripheral surface 501 .
  • the second side hole 52 is a through hole penetrating through the cylindrical body 5 in the radial direction. Also, the second side hole 52 opens to the second screw portion 51 on the outside of the cylindrical body 5 .
  • a plurality of second side holes 52 are provided. In the present embodiment, the number of the second side holes 52 arranged is eight, which is the same number as the number of the first side holes 22 arranged.
  • the eight second side holes 52 are arranged at equal angular intervals around the central axis J and at the same position in the central axis J direction.
  • the cylindrical body 5 has, on the outer peripheral surface 501, a flange portion 53 that protrudes radially outward, that is, has an enlarged outer diameter.
  • the flange portion 53 is located at the upstream end of the cylindrical body 5 .
  • the second threaded portion 51 By rotating the cylindrical body 5 (second threaded portion 51) configured as described above about the central axis J with respect to the shaft body 2, the second threaded portion 51 is rotated as shown in FIGS. 1 threaded portion 21 to fit the threaded portions together.
  • the cylindrical body 5 can be attached to the upstream side of the shaft body 2 (one side in the central axis J direction).
  • the screwing amount (rotation amount) of the second threaded portion 51 with respect to the first threaded portion 21 is appropriately adjusted according to various conditions such as the type of the rotary electric machine 10 on which the shaft 1 is mounted, for example (see FIG. 5, see Figure 6). Further, the adjustment of the amount of screwing facilitates the positioning of the cylindrical body 5 with respect to the shaft body 2 .
  • the cylindrical body 5 creates a gap GP between the flange portion 53 and the end surface 202 of the shaft body 2 until the flange portion 53 comes into contact with the end surface 202 of the shaft body 2 . It is screwed into the shaft body 2 to an extent.
  • the separation distance SD between the second side hole 52 and the first side hole 22 in the direction of the central axis J can be set larger than the separation distance SD in the attached state shown in FIG.
  • the plurality of second side holes 52 are located upstream of the plurality of first side holes 22 regardless of the amount of screwing.
  • the plurality of first side holes 22 and the plurality of second side holes 52 are connected via the first threaded portion 21 and the second threaded portion 51 .
  • the flow path 12 is the coolant supply hole 33 .
  • the oil O flowing into the shaft 1 from the opening 201 includes the oil O1 that flows directly downstream beyond the second side hole 52 and the oil O1 that flows toward the flow path 12 via the second side hole 52. O2 is present. In this state, when the rotor 30 rotates over a predetermined number of revolutions, the oil O is likely to be preferentially discharged from the second side holes 52 due to centrifugal force.
  • the second side holes 52 and the first side holes 22 are displaced in the direction of the central axis J, the flow of the oil O2 toward the flow path 12 is suppressed. Since the flow of the oil O2 is suppressed, the flow of the oil O1 can be sufficiently secured. As a result, regardless of the rotational speed of the rotor 30, the cooling efficiency of the stator 40 can be improved by the oil O2, and the cooling efficiency of the rotor 30 can be sufficiently improved by the oil O1. Also, the oil O1 can sufficiently function as a lubricating oil for the bearings 35 .
  • the rotation direction of the shaft 1 and the screw directions of the first threaded portion 21 and the second threaded portion 51 are the same.
  • the screw directions of the first threaded portion 21 and the second threaded portion 51 are right-handed. This allows the oil O2 to smoothly pass from the second side hole 52 to the first side hole 22 .
  • the outer diameter ⁇ D51 of the second screw 51 male screw
  • the outer diameter ⁇ D51 of the second screw 51 is preferably 80% or more and 95% or less of the root diameter ⁇ D21 of the first screw 21 (female screw). More preferably, it is 90% or less.
  • the space between the first threaded portion 21 and the second threaded portion 51 is widened as much as possible while the fitting state between the first threaded portion 21 and the second threaded portion 51 is sufficiently maintained, thereby facilitating the flow of the oil O2. can be passed to
  • the thread ridge 511 of the second screw 51 (male screw) and the screw groove 211 of the first screw 21 (female screw) have at least one size or shape in side view when viewed from the radial direction. different.
  • both the shape of the thread 511 and the shape of the thread groove 211 are triangular, but the thread 511 is smaller than the thread groove 211 .
  • This also widens the space between the first threaded portion 21 and the second threaded portion 51 as much as possible, contributing to easy passage of the oil O2.
  • the flow rate of the oil O2 can be adjusted by appropriately changing the design of at least one of the size and shape of each screw.
  • the separation distance SD between the first side hole 22 and the second side hole 52 can be adjusted by changing the amount of screwing of the second threaded portion 51 into the first threaded portion 21 .
  • the smaller the separation distance SD the more the flow rate of the oil O from the second side hole 52 to the first side hole 22 can be increased.
  • the larger the clearance SD is, the more the flow rate of the oil O2 from the second side hole 52 to the first side hole 22 can be reduced. Therefore, the flow rate of the oil O2 can also be adjusted depending on the distance SD.
  • the materials for the shaft body 2 and the cylindrical body 5 are not particularly limited, and for example, hard materials such as metal materials and resin materials can be used.
  • the rotating electric machine and the drive device of the present invention have been described with reference to the illustrated embodiments, but the present invention is not limited to this, and each part constituting the rotating electric machine and the drive device performs the same function. can be substituted with any configuration available. Moreover, arbitrary components may be added. Also, a plurality of types of cylindrical bodies 5 having different arrangement positions and numbers of the second side holes 52 in the direction of the central axis J may be prepared in advance. In this case, an appropriate cylindrical body 5 can be selected from a plurality of types of cylindrical bodies 5 and attached to the shaft main body 2 according to various conditions such as the type of the rotating electric machine 10 on which the shaft 1 is mounted. . Further, the cylindrical body 5 is composed of one continuous member, but is not limited to this, and for example, has a configuration including a divided body divided into at least two along the direction of the central axis J. may

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

Abstract

L'invention concerne une machine électrique tournante dans laquelle l'efficacité de refroidissement d'un rotor et d'un stator est améliorée et un dispositif d'entraînement. Cette machine électrique tournante 10 comprend un rotor 30 ayant un arbre 1 et un stator situé à l'extérieur du rotor 30 dans la direction radiale. L'arbre 1 comprend : un corps d'arbre cylindrique 2 ayant une première partie vis 21 disposée sur la surface circonférentielle interne 231 et une pluralité de premiers trous latéraux 22 pénétrant dans la direction radiale ; et un corps cylindrique 5 ayant une deuxième partie vis 51 disposée sur la surface circonférentielle externe 501 et une pluralité de deuxièmes trous latéraux 52 pénétrant dans la direction radiale. La deuxième partie vis 51 est mise en rotation et ajustée dans la première partie vis 21, et de ce fait, dans un état de fixation dans lequel le corps cylindrique 5 est fixé à un côté du corps d'arbre 2 dans la direction de l'axe J, la pluralité de deuxièmes trous latéraux 52 étant situés d'un côté dans la direction de l'axe J par rapport à la pluralité de premiers trous latéraux 22. La pluralité de premiers trous latéraux 22 et la pluralité de deuxièmes trous latéraux 52 sont reliées l'une à l'autre par l'intermédiaire de la première partie vis 21 et de la deuxième partie vis 51 et fonctionnent comme des trajets d'écoulement 12 à travers lesquels une huile O peut passer.
PCT/JP2021/022349 2021-02-24 2021-06-11 Machine électrique tournante et dispositif d'entraînement WO2022180875A1 (fr)

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Application Number Priority Date Filing Date Title
JP2021-027133 2021-02-24
JP2021027133 2021-02-24

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WO2022180875A1 true WO2022180875A1 (fr) 2022-09-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386414A (en) * 1976-11-30 1978-07-29 Sp K Buyuro Enerugohimumashi Electric machine which is cooled by lowwtemperature fluid
WO2011132784A1 (fr) * 2010-04-23 2011-10-27 株式会社Ihi Machine rotative
JP2013051805A (ja) * 2011-08-31 2013-03-14 Toyota Motor Corp 回転電機の冷却構造
JP2015226363A (ja) * 2014-05-27 2015-12-14 富士重工業株式会社 電動モータの冷却装置
JP2016014445A (ja) * 2014-07-03 2016-01-28 Ntn株式会社 インホイールモータ駆動装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386414A (en) * 1976-11-30 1978-07-29 Sp K Buyuro Enerugohimumashi Electric machine which is cooled by lowwtemperature fluid
WO2011132784A1 (fr) * 2010-04-23 2011-10-27 株式会社Ihi Machine rotative
JP2013051805A (ja) * 2011-08-31 2013-03-14 Toyota Motor Corp 回転電機の冷却構造
JP2015226363A (ja) * 2014-05-27 2015-12-14 富士重工業株式会社 電動モータの冷却装置
JP2016014445A (ja) * 2014-07-03 2016-01-28 Ntn株式会社 インホイールモータ駆動装置

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