WO2023228285A1 - フライホイール装置および回転電機 - Google Patents

フライホイール装置および回転電機 Download PDF

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Publication number
WO2023228285A1
WO2023228285A1 PCT/JP2022/021287 JP2022021287W WO2023228285A1 WO 2023228285 A1 WO2023228285 A1 WO 2023228285A1 JP 2022021287 W JP2022021287 W JP 2022021287W WO 2023228285 A1 WO2023228285 A1 WO 2023228285A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnets
magnet
flywheel device
cylindrical member
flywheel
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/JP2022/021287
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
修 中田
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.)
Nakada Create Corp
Original Assignee
Nakada Create 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 Nakada Create Corp filed Critical Nakada Create Corp
Priority to JP2024522768A priority Critical patent/JP7816816B2/ja
Priority to EP22942959.2A priority patent/EP4492647A4/en
Priority to CN202280040329.3A priority patent/CN117461246A/zh
Priority to PCT/JP2022/021287 priority patent/WO2023228285A1/ja
Priority to US18/855,097 priority patent/US20250246969A1/en
Priority to TW112119122A priority patent/TWI910431B/zh
Publication of WO2023228285A1 publication Critical patent/WO2023228285A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02K7/04—Balancing means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
    • F16C32/0425—Passive magnetic bearings with permanent magnets on both parts repelling each other for radial load mainly
    • 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
    • H02K7/02—Additional mass for increasing inertia, e.g. flywheels
    • H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
    • 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
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Definitions

  • the present invention relates to a flywheel device and a rotating electric machine.
  • a generator rotates a rotor inside a stator fixed to a support, and generates electricity using the induced electromotive force generated thereby.
  • the rotational motion of the rotor is driven by, for example, torque generated by hydraulic power, thermal power, nuclear power, or an internal combustion engine such as a diesel engine.
  • magnetic bearings that use permanent magnets are more effective than magnetic bearings that use electromagnets in that they can command rotation without unnecessary power consumption.
  • the present invention provides stable rotation that suppresses not only friction in the circumferential direction (radial direction) but also movement in the axial direction (axial direction) without causing friction, and further reduces rotational energy.
  • the purpose is to provide a flywheel device that lasts.
  • a flywheel device includes: a support and a rotating shaft; a pair of disc members fixed apart from each other on the rotating shaft; an inner cylindrical member connected to the outer periphery of the disc member and formed coaxially with the rotation axis;
  • a flywheel device comprising: a pair of outer cylindrical members arranged on the support body to face the outer periphery of the inner cylindrical member and spaced apart from the outer periphery of the inner cylindrical member, The disk member and the inner cylindrical member constitute a flywheel,
  • the inner cylindrical member is formed by continuously arranging inner magnets having magnetic poles on the outer peripheral surface in the circumferential direction,
  • the outer cylindrical member has outer magnets facing the inner magnet facing the same polarity and arranged continuously in the circumferential direction,
  • the rotating shaft is rotatably supported by the support body in a non-contact manner due to the repulsive force of the inner magnet and the outer magnet,
  • the center of the axial width of the inner magnet is offset from the center of the axial width of the outer magnet.
  • another embodiment of the present invention includes the flywheel device, a rotor fixed to the rotating shaft in the middle of the pair of disc members, and a stator disposed on the support body.
  • the present invention relates to a rotating electrical machine having the following features.
  • a flywheel device that lasts can be provided.
  • FIG. 1 is a front view of a flywheel device according to a first embodiment of the present invention.
  • 2 is a sectional view of the flywheel device shown in FIG. 1.
  • FIG. FIG. 3 is a partial cross-sectional view of a flywheel device according to a second embodiment of the present invention. It is a front view of the modification of the flywheel device of the 1st embodiment of the present invention.
  • FIGS. 1 and 2 are a front view and a sectional view illustrating a flywheel device 100 according to a first embodiment.
  • the flywheel device 100 includes a support body 10, a rotating shaft 20, a pair of disc members 30 spaced apart and fixed on the rotating shaft 20, each connected to the outer periphery of the disc member 30, and connected to the rotating shaft 20.
  • a pair of inner cylindrical members 40 coaxially formed, and a pair of outer cylindrical members disposed on the support body 10 facing the outer periphery of the inner cylindrical member 40 and spaced apart from the outer periphery of the inner cylindrical member 40. 50.
  • a direction parallel to the rotating shaft 20 is referred to as an axial direction or an axial direction
  • a direction perpendicular to the rotating shaft 20 and directed toward the circumferential direction of the disc member 30 is referred to as a circumferential direction or a radial direction.
  • the direction in which the pair of disk members 30 approach each other toward the plane of symmetry is defined as the inward or inward thrust direction
  • the direction in which they move away from each other is defined as the outward or outward direction in the thrust direction.
  • the support body 10 is a structure that is provided with an outer cylindrical member 50, which will be described later, and supports other members of the flywheel device 100 in a non-contact manner.
  • the support body 10 may further be provided with a stator 80 of the rotating electric machine 300 as described later.
  • the support body 10 may have any shape and may be made of any material as long as it has the strength to resist the repulsive force of the magnet applied to the outer cylindrical member 50.
  • soft magnetic materials such as iron, silicon steel, permalloy, and sendust
  • non-magnetic materials such as carbon and wood can be used.
  • the rotating shaft 20 is an axis on which a pair of disc members 30 are provided, and serves as a central axis of rotation.
  • a rotor 70 of a rotating electric machine 300 is also provided on the rotating shaft 20 as described later, and the rotor 70 can be rotated as the rotating shaft 20 rotates.
  • the disc members 30 are a pair of circular members that are spaced apart from each other on the rotating shaft 20, with the rotating shaft 20 as the center of the circle.
  • the disk member 30 has a larger area than the cross-sectional area of the rotating shaft 20.
  • the disc member 30 is preferably lightweight, and preferably has a hollow structure. Further, it is preferable that the width in the axial direction is smaller than that of the inner cylindrical member 40.
  • the inner cylindrical members 40 are members connected to the outer peripheries of the disk members 30 and formed coaxially with the rotating shaft 20.
  • the inner cylindrical member 40 is formed by arranging inner magnets 45 having magnetic poles on the outer circumferential surface continuously in the circumferential direction.
  • Inner magnet 45 preferably forms a cylindrical shape.
  • the inner magnet 45 may be formed by an integrated cylindrical magnet (see FIG. 1), or may be formed by dividing magnets arranged in a cylindrical shape so that the magnetic poles on the outer circumferential surface thereof are the same. Good (see Figure 4).
  • the magnet used for the inner magnet 45 is preferably a permanent magnet with strong magnetic force, and for example, a neodymium magnet, a rare earth magnet such as a samarite cobalt magnet, a ferrite magnet, etc. can be used.
  • the inner cylindrical member 40 constitutes a flywheel 60 together with the disk member 30, and the moment of inertia allows the rotational energy to be further sustained.
  • the moment of inertia J d of a disk-shaped flywheel having a diameter D and the moment of inertia J c of a cylindrical flywheel can be calculated as follows.
  • the cylindrical flywheel has a larger moment of inertia, it is preferable that the mass of the inner cylindrical member 40 is larger and the disc member 30 is lighter.
  • the outer cylindrical members 50 are arranged on the support body 10 to face the outer periphery of the inner cylindrical member 40 and spaced apart from the outer periphery of the inner cylindrical member 40 .
  • outer magnets 55 facing the inner magnets 45 with the same polarity are arranged continuously in the circumferential direction.
  • the outer magnet 55 preferably forms a cylindrical shape.
  • the outer magnet 55 like the inner magnet 45, may be formed of an integrated cylindrical magnet (see FIG. 1), or the divided magnets may be formed into a cylindrical shape so that the magnetic poles on their outer peripheral surfaces are the same. It may be arranged (see FIG. 4).
  • the magnet used for the outer magnet 55 is preferably a permanent magnet with strong magnetic force, and for example, a rare earth magnet such as a neodymium magnet, a samarite cobalt magnet, a ferrite magnet, etc. can be used. .
  • the center 46 of the axial width of the inner magnet 45 is offset from the center 56 of the axial width of the outer magnet 55.
  • each of the width centers 46 of the inner magnets 45 is offset from each of the width centers 56 of the outer magnets 55 in the thrust direction inward (the direction toward each other in the axial direction) or the thrust direction outward (the direction in which they move away from each other). ing.
  • the width centers 46 of the inner magnets 45 are shifted inward in the thrust direction with respect to the width centers 56 of the outer magnets 55.
  • the structure is shown below.
  • a radial repulsive force (arrow R) and a thrust repulsive force (arrow S) are generated between the width center 46 of the inner magnet 45 and the width center 56 of the outer magnet 55. Therefore, the flywheel 60 is indirectly held inward in the thrust direction by the outer magnet 55.
  • the flywheel 60 can maintain a non-contact state in both the radial direction and the axial direction by the outer magnet 55, and performs its original function as a flywheel.
  • it can also have the function of reducing friction that occurs during rotation as a magnetic bearing that levitates and supports the rotating shaft 20 including the rotor 70 by magnetic repulsion. That is, since the force acting on the bearing according to the embodiment of the present invention is a repulsive force, the rotating shaft 20 can be held at a position where the magnetic forces are balanced without requiring complicated control.
  • the flywheel function and the magnetic bearing function are integrated, the device can be made smaller.
  • FIG. 3 shows a flywheel device 200 according to a second embodiment of the present invention.
  • the flywheel device 200 has a structure in which each of the width centers 46 of the inner magnets 45 is shifted outward in the thrust direction with respect to each of the width centers 56 of the outer magnets 55. Also in this case, a radial repulsive force (arrow R) and a thrust repulsive force (arrow S) are generated between the width center 46 of the inner magnet 45 and the width center 56 of the outer magnet 55.
  • the strut repulsive force between the other flywheel 60 and the opposing outer magnet 55 increases, and the movement in the strut direction is also suppressed. can do.
  • the flywheel 60 can maintain a stable position in a non-contact state in both the radial direction and the axial direction by the outer magnet 55, and does not generate friction. It is possible to provide stable rotation without any friction and to make the rotational energy more sustainable.
  • a third embodiment of the present invention relates to a rotating electric machine 300 including the above-described flywheel device.
  • the rotating electric machine 300 includes the above-described flywheel device 100 or 200 of the present invention, and includes a rotor 70 fixed to the rotating shaft 20 in the middle of the pair of disc members 30, and a stator 80 disposed on the support 10. and has.
  • the rotating electric machine 300 can be used as a generator or a motor.
  • a portion of the rotor 70 may directly contact an external terminal such as a brush, or a terminal portion (not shown) electrically connected to the rotor 70 may come into contact with an external terminal such as a brush.
  • Support body Rotating shaft 30
  • Disc member 40 Inner cylindrical member 45
  • Inner magnet 46 Center of axial width of inner magnet 50
  • Outer magnet 56 Center of axial width of outer magnet 60
  • Flywheel 70 Rotor 80 Stator 100
  • Flywheel device 200 Flywheel device 300
  • Rotating electrical machine R
  • Radial repulsive force S Strass repulsive force

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
PCT/JP2022/021287 2022-05-24 2022-05-24 フライホイール装置および回転電機 Ceased WO2023228285A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2024522768A JP7816816B2 (ja) 2022-05-24 2022-05-24 フライホイール装置および回転電機
EP22942959.2A EP4492647A4 (en) 2022-05-24 2022-05-24 FLYWHEEL DEVICE AND ROTATING ELECTRIC MACHINE
CN202280040329.3A CN117461246A (zh) 2022-05-24 2022-05-24 飞轮装置及旋转电机
PCT/JP2022/021287 WO2023228285A1 (ja) 2022-05-24 2022-05-24 フライホイール装置および回転電機
US18/855,097 US20250246969A1 (en) 2022-05-24 2022-05-24 Flywheel device and rotary electric machine
TW112119122A TWI910431B (zh) 2022-05-24 2023-05-23 飛輪裝置及旋轉電機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/021287 WO2023228285A1 (ja) 2022-05-24 2022-05-24 フライホイール装置および回転電機

Publications (1)

Publication Number Publication Date
WO2023228285A1 true WO2023228285A1 (ja) 2023-11-30

Family

ID=88918631

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/021287 Ceased WO2023228285A1 (ja) 2022-05-24 2022-05-24 フライホイール装置および回転電機

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Country Link
US (1) US20250246969A1 (https=)
EP (1) EP4492647A4 (https=)
JP (1) JP7816816B2 (https=)
CN (1) CN117461246A (https=)
TW (1) TWI910431B (https=)
WO (1) WO2023228285A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4841136A (https=) * 1971-09-27 1973-06-16
JPS5612831A (en) * 1979-07-09 1981-02-07 Nakano Bussan Kk Tubular potary electric machine
JPH11325074A (ja) 1998-03-12 1999-11-26 Copal Electronics Co Ltd 軸受構造
JP2018191507A (ja) 2018-06-28 2018-11-29 株式会社ナカダクリエイト フライホイール装置及び回転電機

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007092646A (ja) * 2005-09-29 2007-04-12 Jtekt Corp 燃料電池用過給機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4841136A (https=) * 1971-09-27 1973-06-16
JPS5612831A (en) * 1979-07-09 1981-02-07 Nakano Bussan Kk Tubular potary electric machine
JPH11325074A (ja) 1998-03-12 1999-11-26 Copal Electronics Co Ltd 軸受構造
JP2018191507A (ja) 2018-06-28 2018-11-29 株式会社ナカダクリエイト フライホイール装置及び回転電機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4492647A4

Also Published As

Publication number Publication date
EP4492647A1 (en) 2025-01-15
JPWO2023228285A1 (https=) 2023-11-30
US20250246969A1 (en) 2025-07-31
TWI910431B (zh) 2026-01-01
JP7816816B2 (ja) 2026-02-18
CN117461246A (zh) 2024-01-26
EP4492647A4 (en) 2025-12-10
TW202346732A (zh) 2023-12-01

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