WO2021117884A1 - 回転装置 - Google Patents

回転装置 Download PDF

Info

Publication number
WO2021117884A1
WO2021117884A1 PCT/JP2020/046351 JP2020046351W WO2021117884A1 WO 2021117884 A1 WO2021117884 A1 WO 2021117884A1 JP 2020046351 W JP2020046351 W JP 2020046351W WO 2021117884 A1 WO2021117884 A1 WO 2021117884A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow path
rotor
cooling oil
outlet
inlet
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/JP2020/046351
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
哲行 寺内
慶一 坂牧
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.)
IHI Corp
Original Assignee
IHI 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 IHI Corp filed Critical IHI Corp
Priority to US17/784,592 priority Critical patent/US20230006514A1/en
Priority to JP2021564068A priority patent/JPWO2021117884A1/ja
Publication of WO2021117884A1 publication Critical patent/WO2021117884A1/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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • 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
    • H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium

Definitions

  • the present disclosure relates to a rotating device.
  • the present application claims priority based on Japanese Patent Application No. 2019-224479 filed in Japan on December 12, 2019, the contents of which are incorporated herein by reference.
  • Patent Document 1 discloses an electric motor using a permanent magnet as a magnetic pole.
  • a permanent magnet is provided on a rotor (rotor), and the permanent magnet is held by a shrink ring (magnet holding portion) provided on the outer periphery of the permanent magnet.
  • a shrink ring magnet holding portion
  • a pump for supplying cooling oil to the oil passage (cooling flow path) may be provided.
  • a pump for supplying cooling oil to the oil passage cooling flow path
  • a supply device such as a pump
  • the present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a rotating device capable of flowing cooling oil in a cooling flow path without depending on a supply device such as a pump.
  • the rotating device is connected to a rotor, an inlet flow path that guides a cooling medium radially outward in the rotor, and an inlet flow path, and is connected to a rotating shaft of the rotor.
  • the outlet of the outlet flow path is provided with an axial flow path that guides the cooling medium along the axis and an outlet flow path that is connected to the axial flow path and guides the cooling medium radially inward in the rotor.
  • the rotor is formed radially outside the inlet of the inlet flow path.
  • the rotating device includes a rotating shaft protruding from the axial end face of the rotating shaft on the outlet flow path side of the rotor, and the outlet of the outlet flow path rotates. It communicates with the outer peripheral surface of the shaft.
  • a third aspect of the present disclosure is that in the rotating device according to the first or second aspect, a sealing member for suppressing leakage of the cooling medium is provided in the axial flow path.
  • the cooling medium can be made to flow by centrifugal force. Further, an outlet flow path for returning the cooling medium to the inside of the rotor in the radial direction is provided. This makes it possible to provide a rotating device for flowing cooling oil in the cooling flow path by utilizing the centrifugal force generated when the rotor rotates.
  • a generator will be described as an example of a rotating device.
  • the generator 1 is included in the power generation device 100.
  • the power generation device 100 includes a casing 110, a plurality of bearings 120, a cooling oil supply unit 130, a collar 140, a generator 1, and a rotary drive device such as a wing (not shown).
  • a power generation device 100 is a device that generates power by rotating a rotor 2 described later in the generator 1 with a rotation drive device (not shown).
  • the generator 1 (rotating device) includes a rotor 2 and a stator 3, and flow paths R1 to R4 are formed in each member.
  • the rotor 2 is rotatably held inside the stator 3.
  • Such a rotor 2 includes an inner shaft 2a (rotating shaft), an outer shaft 2b, a permanent magnet 2c, a magnet holding portion 2d, an end member 2e, a first end holding ring 2f, and a second. It includes an end holding ring 2g and a sealing member 2h.
  • the flow paths R1 to R4 are provided in the rotor 2, and the generator 1 includes such flow paths R1 to R4.
  • the direction along the central axis O (rotation axis, that is, the rotation axis) of the rotor 2 is referred to as an axial direction, and the direction intersecting the central axis O when viewed from the axial direction is referred to as a radial direction.
  • the direction around the axis O is referred to as the circumferential direction.
  • the "cross-sectional view seen from the axial direction” means a cross-sectional view including a plane orthogonal to the central axis O.
  • the inner shaft 2a is a cylindrical member and is fixed to the outer shaft 2b. Further, the inner shaft 2a is fixed to the inside of the outer shaft 2b. Further, the inner shaft 2a is longer than the outer shaft 2b, and one end (the end near the casing 110) protrudes from the outer shaft 2b. Such an inner shaft 2a protrudes from the axial end face of the rotor 2 on the rotation shaft side of the outlet flow path R4, which will be described later. Further, the inner shaft 2a is rotationally symmetric with respect to the rotation axis. The inner shaft 2a may be a solid round bar-shaped member. The inner shaft 2a protrudes from the axial end surface of the outer shaft 2b on the outlet flow path R4 side.
  • the outer shaft 2b is a cylindrical member. Further, as shown in FIG. 3, the outer shaft 2b has a substantially octagonal outer shape as shown in FIG. 2, and the outer shape has an octagonal columnar shape.
  • permanent magnets 2c are installed on each of eight flat surfaces on the outer peripheral surface, and the outer shaft 2b is housed in a magnet holding portion 2d together with a plurality of permanent magnets 2c.
  • the inner shaft 2a has a smaller diameter than the outer shaft 2b.
  • the permanent magnet 2c is fixed to each surface (each flat surface) of the outer shaft 2b and is partially in contact with the magnet holding portion 2d. That is, each of the permanent magnets 2c is held in a state of being sandwiched between the outer shaft 2b and the magnet holding portion 2d. Further, as shown in FIG. 3, the permanent magnets 2c have a plurality of flow path grooves 2c1 parallel to each other formed along the longitudinal direction (axial direction) on the surfaces in contact with the magnet holding portions 2d. The flow path groove 2c1 is formed linearly between both ends of the permanent magnet 2c in the axial direction.
  • the magnet holding portion 2d has a cylindrical shape, and is fixed in a state where the outer shaft 2b holding the permanent magnet 2c is housed inside. Further, the magnet holding portion 2d is partially in contact with the permanent magnet 2c on the inner peripheral side, and holds the permanent magnet 2c between the magnet holding portion 2d and the outer shaft 2b. Further, a groove flow path R3 (axial flow path) for guiding the cooling oil is formed between the magnet holding portion 2d and the permanent magnet 2c by the flow path groove 2c1 of the permanent magnet 2c.
  • the magnet holding portion 2d is formed of, for example, a non-magnetic material (for example, austenitic stainless steel or the like).
  • the end member 2e is an annular member attached to one end (the end near the cooling oil supply unit 130) in the axial direction of the inner shaft 2a and the outer shaft 2b, and is connected to the cooling oil supply unit 130.
  • the end member 2e is formed with inlet flow paths R1 provided radially in the radial direction and at equal intervals in the circumferential direction.
  • the inlet flow path R1 is connected to a flow path Ra, which will be described later.
  • the inlet flow path R1 is provided with a throttle portion 2e1 having a reduced flow path diameter. The flow rate flowing through the inlet flow path R1 is throttled by the throttle portion 2e1, so that the flow rate of each inlet flow path R1 becomes uniform.
  • the first end holding ring 2f is an annular member, and is provided at the end of the permanent magnet 2c and the outer shaft 2b on the end side (right side in FIG. 2, the cooling oil supply part 130 side) of the inner shaft 2a. ing. Further, the first end holding ring 2f is formed with a radial flow path R2 connected to the inlet flow path R1. The radial flow path R2 is connected to the groove flow path R3, respectively. Further, the first end holding ring 2f is provided with a sealing member 2h on the outer peripheral surface in contact with the magnet holding portion 2d. The first end holding ring 2f is provided on the radial outer side of the end member 2e. Each of the plurality of radial flow paths R2 is connected to the inlet flow path R1. The groove flow path R3 (axial flow path) is connected to the inlet flow path R1 via the radial flow path R2.
  • the second end holding ring 2g is an annular member, and is provided at the end of the permanent magnet 2c and the outer shaft 2b so as to face the first end holding ring 2f in the axial direction. Such a second end holding ring 2g is held by sandwiching the permanent magnet 2c and the outer shaft 2b together with the first end holding ring 2f in the axial direction. Further, in the second end holding ring 2g, an outlet flow path R4 is formed radially inside the second end holding ring 2g. In the outlet flow path R4, the outlet R4a is connected to the flow path Rb described later, and communicates (reaches) with the outer peripheral surface of the inner shaft 2a.
  • the second end holding ring 2g is provided with a sealing member 2h at a contact portion with the magnet holding portion 2d.
  • the inlet R1a of the inlet flow path R1 is formed radially inside the outlet R4a of the outlet flow path R4. Further, by connecting the flow paths R1 to R4 in order, the flow flows from the vicinity of the radial center of the rotor 2 toward the outside in the radial direction, extends along the axial direction, and again toward the inside in the radial direction. It constitutes the road.
  • the sealing member 2h is, for example, an O-ring that seals between the first end holding ring 2f and the second end holding ring 2g and the magnet holding portion 2d.
  • the stator 3 is arranged with a gap on the radial outer side of the magnet holding portion 2d.
  • a stator 3 includes a stator core and windings wound around the stator core (both not shown).
  • the casing 110 has a substantially tubular shape, and one end exposed from the outer shaft 2b of the inner shaft 2a is accommodated with a slight gap.
  • the bearing 120 is provided near the end of the stator 3 of the generator 1 in a state of being fixed to the casing 110, and rotatably supports the inner shaft 2a.
  • the cooling oil supply unit 130 is a flow path member provided at the end of the inner shaft 2a.
  • the cooling oil supply unit 130 is connected to an external cooling oil supply device (not shown), and a flow path Ra that radially branches outward in the radial direction is formed.
  • the flow path Ra is connected to the inlet flow path R1.
  • the cooling oil supply unit 130 and the casing 110 are provided at positions that sandwich the outer shaft 2b in the axial direction, respectively.
  • the flow path Ra of the present embodiment extends in the radial direction, it may extend in any other direction, for example, in the axial direction.
  • the collar 140 is an annular member provided on the outer peripheral surface of the inner shaft 2a at intervals, and forms a flow path Rb between the collar 140 and the outer peripheral surface of the inner shaft 2a.
  • the flow path Rb is connected to the outlet flow path R4.
  • the collar 140 of the present embodiment is formed in a tubular shape and is provided between the outer shaft 2b and the casing 110 in the axial direction.
  • the flow path Rb of the present embodiment does not extend in the radial direction, but extends in the axial direction.
  • the cooling oil supplied from an external device is used as a permanent magnet 2c and a magnet holding portion. It constitutes a cooling flow path that guides the vehicle to and from 2d.
  • the flow of the cooling oil in the power generation device 100 in the present embodiment will be described.
  • the generator 1 When the generator 1 is started, the inner shaft 2a and the outer shaft 2b are rotationally driven by blades (not shown), so that the entire rotor 2 is rotated.
  • the magnetic field between the rotor 2 and the stator 3 changes, and a current flows through the winding of the stator 3.
  • the magnet holding portion 2d arranged on the outermost peripheral side of the rotor 2 is close to the permanent magnet 2c and the stator 3, and an eddy current is likely to be generated, so that the temperature may become high.
  • the amount of heat generated in the magnet holding portion 2d is about several times as much as the amount of heat generated (heat loss) in the permanent magnet 2c during driving, and the magnet holding portion The heat loss in 2d is larger than the heat loss in the permanent magnet 2c.
  • the cooling oil that has flowed in from the cooling oil supply unit 130 flows into the inlet flow path R1 via the flow path Ra.
  • the flow path diameter of the inlet flow path R1 is reduced in the throttle portion 2e1, the flow rate of the cooling oil passing through the inlet flow path R1 is suppressed.
  • the overflowing cooling oil flows into the other inlet flow paths R1, so that the flow rate in each inlet flow path R1 becomes substantially uniform.
  • the cooling oil is subjected to a force toward the outside in the radial direction by the centrifugal force of the rotating rotor 2, and is formed between the permanent magnet 2c and the magnet holding portion 2d via the radial flow path R2. It flows into the groove flow path R3.
  • the cooling oil in the groove flow path R3 is pushed out in the direction of the rotation axis and goes toward the outlet flow path R4. At this time, the cooling oil comes into contact with the hot permanent magnet 2c and the magnet holding portion 2d in the groove flow path R3, and removes the heat of the permanent magnet 2c and the magnet holding portion 2d by heat transfer. Then, the cooling oil that flows into the outlet flow path R4 and flows out from the outlet flow path R4 flows into the flow path Rb between the collar 140 and the inner shaft 2a.
  • the cooling oil is stored in a space (not shown) provided in the casing 110 via the flow path R4.
  • the cooling oil temporarily stored in the space is discharged to the outside by a pump or the like (not shown). Further, the cooling oil flowing through the flow path Ra and the flow path Rb is in a substantially atmospheric pressure state, and is not easily affected by a pump or the like provided on the upstream side or the downstream side of the generator 1.
  • the inlet R1a of the inlet flow path R1 is formed radially inside the outlet R4a of the outlet flow path R4, and the groove flow path R3 is the inlet. It is formed radially outside the inlet R1a of the flow path R1 and the outlet R4a of the outlet flow path R4.
  • centrifugal force acts on the cooling oil between the outlet R4a and the inlet R1a, and the pressure on the inlet side can be increased more than the pressure on the outlet side of the cooling flow path. Therefore, the centrifugal force applied to the rotor 2 allows the cooling oil to flow in the cooling flow path.
  • the inlet R1a of the inlet flow path R1 is provided radially inside the outlet R4a of the outlet flow path R4.
  • the centrifugal force applied to the cooling oil in the inlet flow path R1 due to the rotation of the rotor 2 can be made larger than the centrifugal force applied to the cooling oil in the outlet flow path R4. Due to the difference, a flow of cooling oil from the inlet flow path R1 side to the outlet flow path R4 via the groove flow path R3 can be created. Since the flow path Rb extends in the axial direction, it is possible to prevent the centrifugal force applied to the cooling oil in the flow path Rb from affecting the cooling oil in the outlet flow path R4.
  • an outlet flow path R4 for guiding the cooling oil inward in the radial direction is provided, and the cooling oil that has passed through the groove flow path R3 can be discharged after being returned to the outer peripheral surface of the inner shaft 2a. it can.
  • the bearing 120 and the sealing member 2h are arranged radially inside the magnet holding portion 2d provided with the groove flow path R3.
  • the cooling oil After passing through the groove flow path R3, the cooling oil is guided inward in the radial direction by the outlet flow path R4, so that the cooling oil passes inside the bearing 120 and the sealing member 2h and goes to the outside of the generator. Is discharged. With such a configuration, it is possible to prevent the discharged cooling oil from coming into contact with the stator 3 or flowing into the stator 3 and the rotor 2.
  • the sealing member 2h by providing the sealing member 2h, the cooling oil flowing through the cooling flow path leaks from the slight gap between the first end holding ring 2f and the second end holding ring 2g and the magnet holding portion 2d. Can be suppressed.
  • the above embodiment has described the generator 1.
  • an electric motor rotating device
  • a member having heat such as a magnet holding portion is cooled.
  • cooling oil is given as an example as a cooling medium, but the type is not limited as long as it is a fluid and does not interfere with the operation of the generator 1.
  • a coolant other than the cooling oil may be used.
  • the above embodiment does not include a pump for pumping cooling oil, a pump may be provided. In this case, it is possible to increase the pumping force of the cooling oil in the generator 1.
  • the rotor 2 has a double structure of the inner shaft 2a and the outer shaft 2b, but the present invention is not limited to this, and various changes can be made based on design requirements and the like.
  • the rotor 2 may include a shaft in which the inner shaft 2a and the outer shaft 2b are integrated. Even in this case, the flow path Rb is formed between the integrated shaft and the collar 140.
  • the integrated shaft has a first portion (corresponding to the outer shaft 2b) and a second portion (corresponding to the outer shaft 2b) that protrudes in the axial direction from the axial end face of the first portion and has a diameter smaller than that of the first portion (corresponding to the outer shaft 2b).
  • the rotor 2 may include an outer shaft 2b and an inner shaft 2a that protrudes from the axial end surface of the outer shaft 2b on the outlet flow path R4 side and has a diameter smaller than that of the outer shaft 2b. Good.
  • the inlet flow path R1 is connected to the groove flow path R3 via the radial flow path R2.
  • the inlet flow path R1 and the radial flow path R2 may be collectively regarded as the "inlet flow path" of the present disclosure.
  • the cooling oil can flow in the cooling flow path without depending on a supply device such as a pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
PCT/JP2020/046351 2019-12-12 2020-12-11 回転装置 Ceased WO2021117884A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/784,592 US20230006514A1 (en) 2019-12-12 2020-12-11 Rotation device
JP2021564068A JPWO2021117884A1 (https=) 2019-12-12 2020-12-11

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019224749 2019-12-12
JP2019-224749 2019-12-12

Publications (1)

Publication Number Publication Date
WO2021117884A1 true WO2021117884A1 (ja) 2021-06-17

Family

ID=76330047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/046351 Ceased WO2021117884A1 (ja) 2019-12-12 2020-12-11 回転装置

Country Status (3)

Country Link
US (1) US20230006514A1 (https=)
JP (1) JPWO2021117884A1 (https=)
WO (1) WO2021117884A1 (https=)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12614940B2 (en) * 2023-05-25 2026-04-28 Hamilton Sundstrand Corporation Cooling of high-power permanent magnet machine rotor
EP4654439A1 (en) * 2024-05-23 2025-11-26 GKN Aerospace Services Limited Apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010239799A (ja) * 2009-03-31 2010-10-21 Aisin Aw Co Ltd 回転電機及び回転電機用エンドプレート
WO2011132784A1 (ja) * 2010-04-23 2011-10-27 株式会社Ihi 回転機
JP2019106875A (ja) * 2017-12-08 2019-06-27 ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフトＤｒ． Ｉｎｇ． ｈ．ｃ． Ｆ． Ｐｏｒｓｃｈｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ 冷却機能を備える回転子

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2501952B (en) * 2012-10-09 2014-03-26 Integral Powertrain Ltd A motor and a method of cooling a motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010239799A (ja) * 2009-03-31 2010-10-21 Aisin Aw Co Ltd 回転電機及び回転電機用エンドプレート
WO2011132784A1 (ja) * 2010-04-23 2011-10-27 株式会社Ihi 回転機
JP2019106875A (ja) * 2017-12-08 2019-06-27 ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフトＤｒ． Ｉｎｇ． ｈ．ｃ． Ｆ． Ｐｏｒｓｃｈｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ 冷却機能を備える回転子

Also Published As

Publication number Publication date
US20230006514A1 (en) 2023-01-05
JPWO2021117884A1 (https=) 2021-06-17

Similar Documents

Publication Publication Date Title
US8686606B2 (en) Cooling device
CN110707843B (zh) 电机冷却结构及电动汽车用永磁同步电机
JP6270213B2 (ja) 電動機
US10361597B2 (en) Electric machine for a motor vehicle, coil carrier for an electric machine, and motor vehicle
JP7231112B2 (ja) 回転電機のロータ
JP2016041938A (ja) 電動冷却剤ポンプ
JP6056518B2 (ja) 回転電機用回転構造
CN113394937B (zh) 包括使冷却剂循环通过气隙的系统的轴向磁通电机
US11569713B2 (en) Axial flux motor including system for circulating coolant through air gap between stator and rotor
JP2013017297A (ja) 回転電機のロータ
JP5331521B2 (ja) トロイダル巻線モータ
WO2015166772A1 (ja) 回転電機
WO2011132784A1 (ja) 回転機
JP2015226465A (ja) 電気ポンプ
US12348082B2 (en) Fluid cooled stator with grooves in stator core
TWI629860B (zh) 電動機
US12206311B2 (en) Outer diameter side magnet field and magnetic gear
WO2021117884A1 (ja) 回転装置
WO2017077813A1 (ja) アキシャルギャップ型回転電機
JP5892091B2 (ja) マルチギャップ型回転電機
WO2021117896A1 (ja) 回転装置
CN118316215A (zh) 定子铁芯、定子及电机
JP2013051805A (ja) 回転電機の冷却構造
JP6672741B2 (ja) モータ及びこれを備える電動過給機
JP2017153346A (ja) モータ、並びにその外側磁気コア及び内側磁気コア

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: 20899159

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021564068

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20899159

Country of ref document: EP

Kind code of ref document: A1