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WO1997000549A1 - Rotor - Google Patents

Rotor Download PDF

Info

Publication number
WO1997000549A1
WO1997000549A1 PCT/GB1996/001433 GB9601433W WO9700549A1 WO 1997000549 A1 WO1997000549 A1 WO 1997000549A1 GB 9601433 W GB9601433 W GB 9601433W WO 9700549 A1 WO9700549 A1 WO 9700549A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
magnetic
layer
manufacturing
rotor according
Prior art date
Application number
PCT/GB1996/001433
Other languages
English (en)
Inventor
Anthony David Richardson
Original Assignee
Urenco (Capenhurst) Limited
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
Priority claimed from GB9512395A external-priority patent/GB2302455A/en
Application filed by Urenco (Capenhurst) Limited filed Critical Urenco (Capenhurst) Limited
Priority to AU62312/96A priority Critical patent/AU6231296A/en
Publication of WO1997000549A1 publication Critical patent/WO1997000549A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having 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
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • F16F15/305—Flywheels made of plastics, e.g. fibre reinforced plastics [FRP], i.e. characterised by their special construction from such materials
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • 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
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2222/00—Special physical effects, e.g. nature of damping effects
    • F16F2222/06—Magnetic or electromagnetic
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2226/00—Manufacturing; Treatments
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • 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 rotors and particularly, though not exclusively, to rotors for high speed applications, and to methods for their manufacture.
  • WO94/06193 discloses a fibre reinforced rotor suitable for some high speed applications.
  • the rotor comprises fibre reinforced plastics material incorporating magnetic filler material, the fibre reinforced plastics material being arranged as a multi-layered cylindrical portion of the rotor, the magnetic filler material being disposed within and between the layers.
  • the cylindrical portion disclosed is a hollow tubular portion.
  • a rotor comprising a fibre reinforced plastics material incorporating magnetic filler material between layers of the less magnetic plastics material, the rotor having an axis of rotation, wherein the rotor consists of a plate which is thicker radially relative to the axis of rotation than it is longitudinally relative to the axis of rotation.
  • the magnetic material is distributed substantially uniformly circumferentially about the rotor
  • the rotor comprises a central spigot around which the plastics and magnetic material layer or layers is or are located.
  • the peripheral outer layer of the rotor comprises epoxy resin or the like plastics material.
  • the magnetic layer or layers is or are end encapsulated in the rotor.
  • the end encapsulant comprises a fibre reinforced plastics material.
  • the rotor comprises a disc, which may be substantially circular.
  • a body extends from the rotor longitudinally relative to the axis of rotation.
  • the body may be integral with the rotor.
  • Rotors according to the present invention beneficially allow an efficient electromagnetic interaction between the rotor and a neighbouring stator to be maintained across the radius of the disc.
  • the invention includes within its scope a flywheel, centrifuge, electric motor, electric generator and/or disc drive comprising a rotor in accordance with the first aspect of the invention.
  • a method of manufacturing a rotor which method comprises the steps of:
  • the magnetic material is distributed substantially uniformly circumferentially about the rotor.
  • step (ii) will be carried out before step (iii) .
  • the method includes the step of winding a final layer comprising resin impregnated fibres onto the outside of a second layer.
  • steps (ii) and (iii) of the method are repeated.
  • the mandrel is located between cheek plates in a spaced opposed relationship.
  • the inner layer adjacent the mandrel comprises a resin-impregnated fibre layer.
  • the method includes the step of providing an outer peripheral layer comprising resin impregnated fibres .
  • the magnetic field is applied while the resin is in the liquid state, prior to and/or during gelling.
  • the rotor is according to the first aspect of the invention.
  • Figure 1 is a schematic partly cross-sectional illustration of a rotor according to the present invention mounted on a stator.
  • Figure 2 is an enlarged schematic cross-sectional illustration of the areas marked X and Y in Figure 1.
  • a rotor 2 comprising a thin plate in the form of a circular disc 4 of laminated construction attached axially to a central spigot and bearing arrangement 6 having an axis of rotation 7.
  • the bearing arrangement 6 is mounted in a cooperating portion 8 of a stator 10.
  • a stator 10 In the body of the stator 10 are mounted a plurality of electric coils 12 (only two of which are shown) disposed radially relative to the axis 7 and adjacent the rotor 2.
  • the coils 12 are arranged to drive or interact electromagnetically the rotor 2 and how they will be arranged to do so.
  • the dimensions of the disc 4 are such that it is thicker radially relative to the axis of rotation 7 than it is longitudinally relative to the axis of rotation 7.
  • the disc 2 can be seen to comprise inner layer 14 containing fibre reinforcement in an epoxy resin matrix around the central spigot 6.
  • inner layer 14 containing fibre reinforcement in an epoxy resin matrix around the central spigot 6.
  • Around the inner layer 14 are wound a plurality of alternate layers comprising a magnetic powder material held in an epoxy resin matrix 16, 18, 20, 22, 24 and 26, surrounded by an epoxy resin matrix end encapsulant 28, 30, 32, 34, 36 and 38 respectively.
  • layers 40, 42, 44, 46 and 48 respectively containing fibre reinforcement in a resin matrix.
  • the pattern of layers is repeated between areas X and Y.
  • These layers 16-48 are wound to the outside diameter of the electric coils 12 in an annular configuration.
  • Around the circumferential periphery of the disc 4 is wound an additional layer 50 of fibre reinforcement in a resin matrix to contain the inner layers .
  • the magnetic material which tends to be denser, is provided substantially uniformly circumferentially about the disc 4. That is any radial cross section will show substantially the same distribution of magnetic material at a given circumferential distance from the axis 7.
  • the magnetic material By providing the magnetic material evenly circumferentially about the axis of the disc 4, the magnetic material is distributed substantially uniformly circumferentially about the rotor.
  • the even distribution of the denser magnetic material generates an even stress in the material of the rotor. This provides an increased rotational speed capability when compared with prior art arrangements .
  • the bearing and spigot arrangement 6 may comprise any type of bearing suitable for the application, such as air bearings, magnetic bearings and pin bearings.
  • Suitable plastics materials would be any of the known fibre reinforced composite matrix materials.
  • the following may be suitable, optionally with known hardeners, fillers and the like: thermosetting or cold setting or thermoplastic polymeric material such as an epoxy resin or resins, Friedel Crafts resins, polyester resins, polyamides, polyimides, polyether sulphones or polyether ketones.
  • the resin is typically a thermosetting resin, usually cured by heating.
  • Other resins, including cold setting can be used.
  • the fibres used can be carbon fibres, glass fibres or
  • the magnetic material can comprise particles, spheroids, whiskers, fibres or the like. Normally it will be a powder material comprising iron, nickel, cobalt or an alloy thereof. A ferrite such as barium ferrite may be included. Alternatives include hard magnetic materials such as those comprising rare-earth elements eg cobalt- samarium or neodymium-iron-boron.
  • a spigot 6 is provided as a central mandrel about which are wound tows between cheek plates to provide annular rings the cross-sectional configuration of which are shown in Figure 2.
  • the inner layer 16 against the spigot 6, comprises fibre reinforcement in a resin matrix to form an inner ring or secondary mandrel to support the subsequent layers.
  • alternate layers are wound onto the mandrel, a first layer comprising carbon fibres impregnated with uncured epoxy resin, a second layer comprising magnetic material powder in a demagnetised (non-aligned) state and uncured epoxy resin, and following alternate layers.
  • encapsulant resin can be provided around the magnetic material powder layers as shown in Figure 2.
  • a magnetic field is applied in known manner, to align the magnetic powder material prior to setting of the encapsulating resin.
  • the epoxy resin is cured by heating to its curing temperature.
  • the magnetic material powder is then permanently magnetised using a suitable electric coil.
  • a wear resistant outer layer such as chrome can be superimposed on the outer layer if required for the application in which the rotor is to be employed.
  • rotor described above include its use as a flywheel or electric motor/generator. Further, by providing a hollow tubular cylindrical body attached to the rotor, it can be used as a high speed centrifuge.
  • the composite, high-strength structure of the rotor makes it suitable for very high rotational speed applications, ie above 20,000 rpm (eg, 100,000 rpm) , although it is not limited to these speeds.
  • the rotor can be used to form part of a precision disk drive by the provision of a magnetic medium on the disc. In this case the rotational speed of the disc will determine the rate at which data can be retrieved.
  • Rotors (with stators) according to the present invention can be provided in a stacked configuration for some applications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Cette invention concerne des parties tournantes conçues principalement comme éléments destinés à tourner à vitesse élevée, par exemple des volants et/ou des rotors. Le rotor (2) selon l'invention est constitué de matériau plastique renforcé par fibres (40, 42, 44, 46, 48), contenant un matériau de remplissage magnétique (16, 18, 20, 22, 24, 26) entre les couches du matériau plastique (40, 42, 44, 46, 48) qui est moins magnétique. Ledit rotor possède un axe de rotation (7) et comprend un plateau (4) qui est plus épais radialement que longitudinalement par rapport à l'axe de rotation (7). Le matériau magnétique est uniformément réparti de manière circulaire autour de l'axe du rotor, ce qui permet au rotor d'atteindre des vitesses de rotation plus élevées.
PCT/GB1996/001433 1995-06-17 1996-06-13 Rotor WO1997000549A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62312/96A AU6231296A (en) 1995-06-17 1996-06-13 A rotor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9512395A GB2302455A (en) 1995-06-17 1995-06-17 A rotor
GB9512395.6 1995-06-17
GB9525133.6 1995-12-08
GBGB9525133.6A GB9525133D0 (en) 1995-06-17 1995-12-08 A rotor

Publications (1)

Publication Number Publication Date
WO1997000549A1 true WO1997000549A1 (fr) 1997-01-03

Family

ID=26307232

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/001433 WO1997000549A1 (fr) 1995-06-17 1996-06-13 Rotor

Country Status (2)

Country Link
AU (1) AU6231296A (fr)
WO (1) WO1997000549A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766987A1 (fr) * 1997-06-20 1999-02-05 Paul Mueller Gmbh & Co Kg Arbre d'un axe entraine par moteur
GB2483967A (en) * 2010-09-23 2012-03-28 Dyson Technology Ltd A reinforced magnet
WO2014096787A3 (fr) * 2012-12-20 2015-03-26 Williams Hybrid Power Limited Rotor composite chargé magnétiquement et ses procédés de réalisation
FR3027468A1 (fr) * 2014-10-21 2016-04-22 Renault Sa Rotor discoide a structure composite
FR3033095A1 (fr) * 2015-02-19 2016-08-26 Renault Sa Dispositif de fixation des aimants dans un rotor de machine electrique discoide.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5785560A (en) * 1980-11-14 1982-05-28 Pioneer Electronic Corp Manufacture of rotor
JPS57106363A (en) * 1980-12-19 1982-07-02 Pioneer Electronic Corp Manufacture of rotor
WO1994006193A1 (fr) * 1992-09-07 1994-03-17 British Nuclear Fuels Plc Rotor renforce par des fibres

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5785560A (en) * 1980-11-14 1982-05-28 Pioneer Electronic Corp Manufacture of rotor
JPS57106363A (en) * 1980-12-19 1982-07-02 Pioneer Electronic Corp Manufacture of rotor
WO1994006193A1 (fr) * 1992-09-07 1994-03-17 British Nuclear Fuels Plc Rotor renforce par des fibres

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 170 (E - 128) 3 September 1982 (1982-09-03) *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 194 (E - 134) 2 October 1982 (1982-10-02) *
R.F.POST & S.F.POST: "Flywheels", SCIENTIFIC AMERICAN, vol. 229, no. 6, December 1973 (1973-12-01), NEW YORK US, pages 17 - 23, XP002016393 *
RIES D M ET AL: "DESIGN AND MANUFACTURING FOR A COMPOSITE MULTI-RING FLYWHEEL", ENERGY SYSTEMS, NEW TECHNOLOGIES, SAN DIEGO, AUG. 3 - 7, 1992, vol. 4, 3 August 1992 (1992-08-03), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 4.43 - 4.48, XP000384685 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766987A1 (fr) * 1997-06-20 1999-02-05 Paul Mueller Gmbh & Co Kg Arbre d'un axe entraine par moteur
GB2328490A (en) * 1997-06-20 1999-02-24 Paul Mueller Gmbh & Co Kg Shaft for motor-driven spindle
GB2328490B (en) * 1997-06-20 2001-10-17 Paul Mueller Gmbh & Co Kg Shaft for motor-driven spindle
GB2483967B (en) * 2010-09-23 2014-12-31 Dyson Technology Ltd A reinforced rotor magnet and method of manufacturing the same
US8736410B2 (en) 2010-09-23 2014-05-27 Dyson Technology Limited Reinforced magnet
US8741088B2 (en) 2010-09-23 2014-06-03 Dyson Technology Limited Reinforced magnet
GB2483967A (en) * 2010-09-23 2012-03-28 Dyson Technology Ltd A reinforced magnet
EP2942797A1 (fr) * 2010-09-23 2015-11-11 Dyson Technology Limited Aimant renforcé
WO2014096787A3 (fr) * 2012-12-20 2015-03-26 Williams Hybrid Power Limited Rotor composite chargé magnétiquement et ses procédés de réalisation
CN104871413A (zh) * 2012-12-20 2015-08-26 Gkn混合动力有限公司 磁性负载复合转子以及制作磁性负载复合转子的方法
US20160197532A1 (en) * 2012-12-20 2016-07-07 Williams Hybrid Power Limited Magnetically loaded composite rotor and methods of making the same
US10014747B2 (en) * 2012-12-20 2018-07-03 Gkn Hybrid Power Ltd. Magnetically loaded composite rotor and methods of making the same
FR3027468A1 (fr) * 2014-10-21 2016-04-22 Renault Sa Rotor discoide a structure composite
FR3033095A1 (fr) * 2015-02-19 2016-08-26 Renault Sa Dispositif de fixation des aimants dans un rotor de machine electrique discoide.

Also Published As

Publication number Publication date
AU6231296A (en) 1997-01-15

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