GB463783A - Improvements relating to dynamo-electric machines and rotor elements therefor - Google Patents

Improvements relating to dynamo-electric machines and rotor elements therefor

Info

Publication number
GB463783A
GB463783A GB31612/36A GB3161236A GB463783A GB 463783 A GB463783 A GB 463783A GB 31612/36 A GB31612/36 A GB 31612/36A GB 3161236 A GB3161236 A GB 3161236A GB 463783 A GB463783 A GB 463783A
Authority
GB
United Kingdom
Prior art keywords
rotor
stator
oxide
nov
heated
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
GB31612/36A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB463783A publication Critical patent/GB463783A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/18—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having horse-shoe armature cores
    • H02K21/185—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having horse-shoe armature cores with the axis of the rotor perpendicular to the plane of the armature

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

463,783. Alternating-currentmotors; magnetos; magnets. BRITISH THOMSONHOUSTON CO., Ltd. Nov. 18, 1936, No. 31612. Convention date, Nov. 19, 1935. [Class 35] A rotor for a motor or magneto consists of or embodies permanently magnetized nonconducting sintered magnetic oxide. The rotor is primarily intended for co-operation with the stator of a self - starting synchronous motor. The oxide powder, the volume resistivity and specific gravity of which are specified, is moulded under pressure, heated in an inert atmosphere to about 1500‹ C. after removal from the mould, allowed to cool and finally may be heated and partially cooled in the field of a continuous current electromagnet. The rotor may comprise ferric oxide, cobalt oxide, and magnetite in specified proportions. The rotors described are disc shaped and have two or four poles. The rotor 12 may co-operate with an unshaded stator system which may be U-shaped or a straight bar 13 as in Fig. 3 or the stator may have shading coils 16, Fig. 4. A spring coiled round the motor shaft and anchored at one end may be provided to ensure starting in one direction. An additional rotor element may be provided when an increased starting torque is required.
GB31612/36A 1935-11-19 1936-11-18 Improvements relating to dynamo-electric machines and rotor elements therefor Expired GB463783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US463783XA 1935-11-19 1935-11-19

Publications (1)

Publication Number Publication Date
GB463783A true GB463783A (en) 1937-04-06

Family

ID=21943119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31612/36A Expired GB463783A (en) 1935-11-19 1936-11-18 Improvements relating to dynamo-electric machines and rotor elements therefor

Country Status (1)

Country Link
GB (1) GB463783A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975485C (en) * 1951-04-23 1961-12-07 Philips Nv Impulse transformer with a core made of highly permeable ferromagnetic material which is pre-magnetized by a permanent magnet
DE976970C (en) * 1951-04-23 1964-10-01 Philips Nv Almost closed ferromagnetic core with an air gap and possibly consisting of several parts
WO2018078508A1 (en) 2016-10-24 2018-05-03 The Trustees For The Time Being Of The Kmn Fulfilment Trust An electromagnet component comprising magnetite for use in a generator
WO2020201937A1 (en) * 2019-03-29 2020-10-08 The Trustees For The Time Being Of The Kmn Fulfilment Trust An electric power machine with a rotor member comprising magnetite

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975485C (en) * 1951-04-23 1961-12-07 Philips Nv Impulse transformer with a core made of highly permeable ferromagnetic material which is pre-magnetized by a permanent magnet
DE976970C (en) * 1951-04-23 1964-10-01 Philips Nv Almost closed ferromagnetic core with an air gap and possibly consisting of several parts
WO2018078508A1 (en) 2016-10-24 2018-05-03 The Trustees For The Time Being Of The Kmn Fulfilment Trust An electromagnet component comprising magnetite for use in a generator
WO2020201937A1 (en) * 2019-03-29 2020-10-08 The Trustees For The Time Being Of The Kmn Fulfilment Trust An electric power machine with a rotor member comprising magnetite

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