WO2004057628A2 - Machine electrodynamique - Google Patents

Machine electrodynamique Download PDF

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Publication number
WO2004057628A2
WO2004057628A2 PCT/NZ2003/000273 NZ0300273W WO2004057628A2 WO 2004057628 A2 WO2004057628 A2 WO 2004057628A2 NZ 0300273 W NZ0300273 W NZ 0300273W WO 2004057628 A2 WO2004057628 A2 WO 2004057628A2
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic material
core
wound
spiral
length
Prior art date
Application number
PCT/NZ2003/000273
Other languages
English (en)
Other versions
WO2004057628A3 (fr
Inventor
Drazen Jaksic
Gordon Harry Evans
Original Assignee
Wellington Drive Technologies Ltd
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 Wellington Drive Technologies Ltd filed Critical Wellington Drive Technologies Ltd
Priority to AU2003288821A priority Critical patent/AU2003288821A1/en
Publication of WO2004057628A2 publication Critical patent/WO2004057628A2/fr
Publication of WO2004057628A3 publication Critical patent/WO2004057628A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
    • H01F41/022—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) by winding the strips or ribbons around a coil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/026—Wound cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores

Definitions

  • This invention relates to toroidally wound electrodynamic machines.
  • Toroidally wound electrodynamic machines consist of stator and rotor, the stator being formed from a toroidal electromagnetic core with a coil or coils wound upon that core, the coil axis being substantially tangential to the core.
  • Such stators are by their very nature relatively difficult to construct, in that complex machinery is required to form the windings about the core. To overcome this difficulty some manufacturers have wound the coils onto bobbins using simple winding equipment, and the wound bobbins are later introduced onto a split magnetic core. The discontinuity in the core introduces an airgap in the electromagnetic core, reducing flux density and potentially introducing saliency into the operation of the machine. Such a construction is shown in US patent specification 469 080.
  • helical refers to a material arranged in a substantially constant pitch, substantially constant diameter helix of more than one turn. Typically the material of which the helix is made is wider radially than it is along the axis of the helix.
  • piral refers to a material arranged in an ever decreasing or increasing radius. The material is normally of constant cross-section and wider normal to the radius than it is thick along the radius.
  • “toroidal” refers to a material of substantially constantly repeating cross section arranged in a torus. Typically the cross section may be constant as a whole but it may also include radial inner or outer protrusions at regular intervals.
  • the invention may broadly be said to consist in a toroidally wound electrodynamic machine wherein the electromagnetic core is made from at least one length of magnetic material, and the magnetic material is positioned within a winding consisting of a plurality of separated wound coils, by introducing one end of the magnetic material between two adjacent wound coils and pushing the magnetic material with sufficient force to slide through each of the wound coils and to form the magnetic material into a helical or spiral coil within the wound coils.
  • the magnetic material that is positioned within the winding has sufficient length to form at least one complete turn.
  • the magnetic material has sufficient length to form at least two complete turns.
  • the magnetic material is soft iron.
  • the magnetic material is in the form of a thin flat bar of constant cross-section.
  • the bar is arranged in the form of a spiral.
  • the bar is arranged in the form of a helix.
  • At least one side of the magnetic material is etched or coated to reduce eddy currents.
  • At least one of the wound coils arranged in the circular pattern has a larger mouth leading to its internal diameter, than an adjacent wound coil in the pattern, so as to provide a simpler path to insert the magnetic material.
  • this larger mouth protrudes in the radial direction
  • this larger mouth protrudes in the axial direction
  • the gap between coils is sufficiently large to easily feed the magnetic material between coils when all coils have identical mouths
  • the toroidally wound electrodynamic machine is an electric motor.
  • the invention may also broadly be said to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of the parts, elements or features, and where specific integers are mentioned herein which have known equivalents, such equivalents are incorporated herein as if they were individually set forth.
  • FIGURE 1 is a perspective view of a plurality of bobbins carrying wound coils and captured inside a frame allowing insertion of the core.
  • FIGURE 2 shows a side view of the frame
  • FIGURE 3 is a cross-section along line A-A of the frame and bobbins
  • FIGURE 4 is a perspective view of a completed coil assembly still located in the frame
  • FIGURE 5 is a side view of the completed coil assembly within the frame
  • FIGURE 6 is a cross-section along line B-B of the frame and completed assembly
  • FIGURE 7 is a side view of a bobbin assembly being fed with a helical core
  • FIGURE 8 is a top view of a bobbin assembly with less bobbins fed with a spiral coil.
  • a frame 5 is loaded with bobbins 1 such that the bobbins have no appreciable gap between them.
  • One of the bobbins, 4, has an enlarged mouth on one side and is tilted upwards to allow entry of one end of the core strip 3.
  • Core strip 3 is stiff enough in relation to the bobbin size and the frame curvature that it can be fed into the central cavity of the bobbins sufficiently to complete at least two circuits. Preferably it is sufficiently stiff that it can complete sufficient circuits to substantially fill the bobbin cavity cross-section.
  • the core strip may be etched or coated to reduce the conductive contact between the layers of the inserted coil and so reduce eddy currents.
  • the core strip may consist of one or more layers of magnetic material at least temporarily adhered together to allow insertion.
  • one or more core strips may be inserted independently, offset from each other in an axial direction.
  • Figure 7 shows a helical coil of constant pitch, diameter and cross-section at 701 which is fed into a circular assemblage of winding coils 702 by feeding an end of the helical coil into the centre of the winding at 704.
  • the bobbin 705 is longer than adjacent bobbins, providing an aperture into which the coil is fed.
  • the helical coil is sufficiently stiff, and the inner surface of the winding coils sufficiently low in friction, that the helical coil may be fed until the winding space is as packed as possible by multiple turns of the helical coil.
  • the winding coils are on bobbins of low friction material, typically reinforced nylon.
  • Figure 8 shows a stator 801 as in Figure 1, but in which there are only eight winding coils 802. This provides a larger gap 803 between the pairs of coils and a spiral coil of magnetic material 804 may be introduced between two adjacent winding coils without offsetting them in any way, the flexibility of the stator core material being sufficient to allow what bending is required.
  • At least the preferred form of the invention provides a toroidally wound electrodynamic apparatus having an electromagnetic core without joins.
  • Toroidally wound electrodynamic machines typically have a higher efficiency than radially wound machines.
  • This invention provides a method of creating a core within already created windings which is quicker and has as high an efficiency as a machine wound with a toroidal winder, thus providing industrial applicability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

On forme le noyau d'une machine électrodynamique toroïdale avec des spires disposées dans un cercle en faisant avancer une spirale ou une hélice de matériau de noyau dans l'espace central des bobines constituées de spires de manière à former un noyau bobine en spirale ou en hélice. Les bobines peuvent comprendre une partie élargie dans une bobine, qui permet de faire avancer la spirale ou l'hélice; le nombre de spires peut être suffisamment réduit de manière à ce que l'espace entre les spires permette de faire avancer le matériau de noyau.
PCT/NZ2003/000273 2002-12-20 2003-12-12 Machine electrodynamique WO2004057628A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003288821A AU2003288821A1 (en) 2002-12-20 2003-12-12 An electrodynamic machine with toroidal winding on a spiral or helical core

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ52332502A NZ523325A (en) 2002-12-20 2002-12-20 Stator construction
NZ523325 2002-12-20

Publications (2)

Publication Number Publication Date
WO2004057628A2 true WO2004057628A2 (fr) 2004-07-08
WO2004057628A3 WO2004057628A3 (fr) 2004-08-12

Family

ID=32678111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2003/000273 WO2004057628A2 (fr) 2002-12-20 2003-12-12 Machine electrodynamique

Country Status (3)

Country Link
AU (1) AU2003288821A1 (fr)
NZ (1) NZ523325A (fr)
WO (1) WO2004057628A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011014934A1 (fr) 2009-08-03 2011-02-10 Atlas Copco Airpower Système de turbocompresseur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU792319A1 (ru) * 1979-04-20 1980-12-30 Предприятие П/Я Г-4616 Способ изготовлени электроизол ционных изделий
AU4873185A (en) * 1984-10-17 1986-04-24 Kuhlman Corporation Improved toroidal transformer and machines and methods for making same
US5016832A (en) * 1989-08-21 1991-05-21 Kuhlman Corporation Method and apparatus for winding an amorphous magnetic toroidal transformer core
US6145774A (en) * 1999-09-21 2000-11-14 Micropulse, Inc. Method and apparatus for manufacturing toroidal cores

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6222415A (ja) * 1985-07-22 1987-01-30 Daihen Corp 環状鉄心変圧器の製造方法
JPH06292347A (ja) * 1993-04-02 1994-10-18 Sankyo Seiki Mfg Co Ltd 積層コアの製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU792319A1 (ru) * 1979-04-20 1980-12-30 Предприятие П/Я Г-4616 Способ изготовлени электроизол ционных изделий
AU4873185A (en) * 1984-10-17 1986-04-24 Kuhlman Corporation Improved toroidal transformer and machines and methods for making same
AU2738988A (en) * 1984-10-17 1989-05-25 Kuhlman Corporation Improved toroidal transformer and machines and methods for making same
US5016832A (en) * 1989-08-21 1991-05-21 Kuhlman Corporation Method and apparatus for winding an amorphous magnetic toroidal transformer core
US6145774A (en) * 1999-09-21 2000-11-14 Micropulse, Inc. Method and apparatus for manufacturing toroidal cores

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent Publications Ltd., London, GB; Class V02, AN (1981-L1144D/43) & SU 792 319 A (MIKHAILOV A I) 30 December 1980 *
PATENT ABSTRACTS OF JAPAN & JP 06 292 347 A (SANKYO SEIKI MFG CO LTD) 18 October 1994 *
PATENT ABSTRACTS OF JAPAN & JP 62 022 415 A (DAIHEN CORP) 03 January 1987 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011014934A1 (fr) 2009-08-03 2011-02-10 Atlas Copco Airpower Système de turbocompresseur
US9470238B2 (en) 2009-08-03 2016-10-18 Atlas Copco Airpower, Naamloze Vennootschap Electric motor having segmented stator windings

Also Published As

Publication number Publication date
NZ523325A (en) 2005-05-27
AU2003288821A1 (en) 2004-07-14
AU2003288821A8 (en) 2004-07-14
WO2004057628A3 (fr) 2004-08-12

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