GB1477510A - Method of producing moulded cores employing microlaminations - Google Patents

Method of producing moulded cores employing microlaminations

Info

Publication number
GB1477510A
GB1477510A GB3822474A GB3822474A GB1477510A GB 1477510 A GB1477510 A GB 1477510A GB 3822474 A GB3822474 A GB 3822474A GB 3822474 A GB3822474 A GB 3822474A GB 1477510 A GB1477510 A GB 1477510A
Authority
GB
United Kingdom
Prior art keywords
container
microlaminations
core
conductor
coil
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.)
Expired
Application number
GB3822474A
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1477510A publication Critical patent/GB1477510A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49076—From comminuted material

Abstract

1477510 Making moulded stator cores WESTINGHOUSE ELECTRIC CORP 2 Sept 1974 [11 Sept 1973] 38224/74 Heading B3A A method of making a moulded core having a conductor embedded in it comprises forming the conductor 10, assembling the formed conductor in a flexible container 20 adding insulated ferro-magnetic micro-laminations 35 which have been annealed, into the container, sealing the container, compressing the microlaminations about the conductor to attain a packing factor in excess of 80% and removing the core from the container. The microlaminations comprise parallelepipeds of low carbon steel and they are formed by cutting unplated tin can stock with a high speed rotary cutter unsupported or by slitting the stock and then cutting it with a rotary cutter against a stationary knife edge. Alternatively the microlaminations can be formed from steel wool, shavings or scrap cobalt iron. The microlaminations are annealed at 700‹-800‹C for stress relief, deoxidation, decarburization and improvement of magnetic characteristics. The container 20 is formed of flexible polyurethane resin and the conductor 10 is coated with a rigid insulating coating (16), Fig. 1 (not shown), which maintains its shape after removal from the winding mandrel. The coil is placed in the container along with a core bar 30 and the container is vibrated while the microlaminations 35 are placed around the coil and in a space 34 between the core bar and the coil. A seal 36 is applied to the container when the required amount of microlaminations has been supplied and the sealed container is placed in an isostatic pressurization chamber, where a pressure of about 50 000 psi is applied. Binders for the microlaminations are not normally required, but they may be used if the core is to be subjected to high rotational stresses or if a low isostatic pressure is employed. If necessary a tape of magnetic material may be wound round the core to serve as a yoke.
GB3822474A 1973-09-11 1974-09-02 Method of producing moulded cores employing microlaminations Expired GB1477510A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00396256A US3848331A (en) 1973-09-11 1973-09-11 Method of producing molded stators from steel particles

Publications (1)

Publication Number Publication Date
GB1477510A true GB1477510A (en) 1977-06-22

Family

ID=23566501

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3822474A Expired GB1477510A (en) 1973-09-11 1974-09-02 Method of producing moulded cores employing microlaminations
GB29231/75A Expired GB1482378A (en) 1973-09-11 1974-09-02 Stators for dynamoelectric machines

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB29231/75A Expired GB1482378A (en) 1973-09-11 1974-09-02 Stators for dynamoelectric machines

Country Status (6)

Country Link
US (1) US3848331A (en)
JP (1) JPS5054805A (en)
CA (1) CA988694A (en)
DE (1) DE2443281A1 (en)
FR (1) FR2243508A1 (en)
GB (2) GB1477510A (en)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948690A (en) * 1973-09-11 1976-04-06 Westinghouse Electric Corporation Molded magnetic cores utilizing cut steel particles
JPS53142603A (en) * 1977-05-18 1978-12-12 Matsushita Electric Works Ltd Rotor coil-tube coreless-motor
US4158580A (en) * 1978-04-14 1979-06-19 Westinghouse Electric Corp. Method of making pressed magnetic core components
US4265681A (en) * 1978-04-14 1981-05-05 Westinghouse Electric Corp. Method of producing low loss pressed magnetic cores from microlaminations
US4158581A (en) * 1978-04-14 1979-06-19 Westinghouse Electric Corp. Method of making magnetic component for direct current apparatus
US4158582A (en) * 1978-04-14 1979-06-19 Westinghouse Electric Corp. Method of making pressed magnetic core components
US4158561A (en) * 1978-04-14 1979-06-19 Westinghouse Electric Corp. Method for preparing oxide coated microlamination particles
US4400675A (en) * 1981-11-05 1983-08-23 Westinghouse Electric Corp. Transformer with impedance matching means
US4486641A (en) 1981-12-21 1984-12-04 Ruffini Robert S Inductor, coating and method
US4776980A (en) * 1987-03-20 1988-10-11 Ruffini Robert S Inductor insert compositions and methods
CH675331A5 (en) * 1987-10-21 1990-09-14 Mavilor Syst Sa
NL8802720A (en) * 1988-11-07 1990-06-01 Philips Corp ELECTRIC ACTUATOR.
DE9003343U1 (en) * 1990-03-21 1990-05-23 Herion-Werke Kg, 7012 Fellbach, De
US5403540A (en) * 1990-10-29 1995-04-04 Corning Incorporated Heating of formed metal structure by induction
US5177392A (en) * 1991-01-14 1993-01-05 Westinghouse Electric Corp. High efficiency, low reactance disk-type machine including an improved rotor and stator
US5418811A (en) * 1992-04-08 1995-05-23 Fluxtrol Manufacturing, Inc. High performance induction melting coil
FI110824B (en) * 1993-06-15 2003-03-31 Sundyne Corp Rotor structure in asynchronous electric machine
US5680692A (en) * 1994-10-03 1997-10-28 General Electric Company Fabrication of induction motors
US5990588A (en) * 1996-12-13 1999-11-23 General Electric Company Induction motor driven seal-less pump
US6524380B1 (en) 2000-03-06 2003-02-25 Hamilton Sundstrand Corporation Magnesium methylate coatings for electromechanical hardware
US6232681B1 (en) * 2000-03-23 2001-05-15 Delco Remy International, Inc. Electromagnetic device with embedded windings and method for its manufacture
US7098566B2 (en) * 2001-05-24 2006-08-29 Rajasingham Arjuna Indraes War Axial gap electrical machine
CA2418497A1 (en) 2003-02-05 2004-08-05 Patrick Lemieux High performance soft magnetic parts made by powder metallurgy for ac applications
US7233091B2 (en) 2003-09-05 2007-06-19 Black & Decker Inc. Electric motor with field assemblies having core pieces with mating features
TW200514334A (en) 2003-09-05 2005-04-16 Black & Decker Inc Field assemblies and methods of making same
US7205696B2 (en) 2003-09-05 2007-04-17 Black & Decker Inc. Field assemblies having pole pieces with ends that decrease in width, and methods of making same
US7211920B2 (en) 2003-09-05 2007-05-01 Black & Decker Inc. Field assemblies having pole pieces with axial lengths less than an axial length of a back iron portion and methods of making same
EP2568573A3 (en) 2005-03-07 2014-06-04 Black & Decker Inc. Power Tools with Motor Having a Multi-Piece Stator
US7824324B2 (en) * 2005-07-27 2010-11-02 Neuronetics, Inc. Magnetic core for medical procedures
WO2007120778A2 (en) * 2006-04-14 2007-10-25 Ciiis, Llc Electric motor containing ferromagnetic particles
EP2113984B1 (en) * 2007-02-23 2017-10-11 JTEKT Corporation Motor, and electric pump
KR100973686B1 (en) * 2008-06-23 2010-08-03 전자부품연구원 Stator of coreless motor
FR2946811B1 (en) * 2009-06-11 2011-07-01 Patrick Chevallier STATOR FOR ELECTRIC GENERATOR
WO2012080586A1 (en) * 2010-12-17 2012-06-21 Verteole Stator for an electric generator
FR2982438B1 (en) * 2011-11-03 2014-12-05 Leroy Somer Moteurs ROTOR OF ELECTRIC MACHINE
DE102012202019A1 (en) * 2012-02-10 2013-08-14 Ksb Aktiengesellschaft Manufacturing process for a rotor and rotor
CN104347260B (en) * 2013-07-26 2017-02-08 郑佐 Manufacturing process of integrally formed traction electromagnet
US10923969B2 (en) * 2019-01-14 2021-02-16 GM Global Technology Operations LLC Molded core assemblies for a motor-generator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982689A (en) * 1931-03-16 1934-12-04 Johnson Lab Inc Magnetic core material
US2048222A (en) * 1931-10-08 1936-07-21 Deutsche Edelstahlwerke Ag Improvements, in or relating to magnets
US2064773A (en) * 1933-06-01 1936-12-15 Ferrocart Corp Of America Method for making magnetic cores
US2241441A (en) * 1938-07-15 1941-05-13 Western Electric Co Manufacture of magnetic bodies
US2419847A (en) * 1944-06-02 1947-04-29 Gen Electric Powdered iron magnetic core
US2966704A (en) * 1957-01-22 1961-01-03 Edward D O'brian Process of making a ferrite magnetic device
US3255052A (en) * 1963-12-09 1966-06-07 Magnetics Inc Flake magnetic core and method of making same

Also Published As

Publication number Publication date
CA988694A (en) 1976-05-11
DE2443281A1 (en) 1975-03-20
US3848331A (en) 1974-11-19
FR2243508A1 (en) 1975-04-04
AU7307074A (en) 1976-03-11
JPS5054805A (en) 1975-05-14
GB1482378A (en) 1977-08-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee