GB664902A - Improvements in and relating to dynamo-electric machines - Google Patents

Improvements in and relating to dynamo-electric machines

Info

Publication number
GB664902A
GB664902A GB31553/49A GB3155349A GB664902A GB 664902 A GB664902 A GB 664902A GB 31553/49 A GB31553/49 A GB 31553/49A GB 3155349 A GB3155349 A GB 3155349A GB 664902 A GB664902 A GB 664902A
Authority
GB
United Kingdom
Prior art keywords
shunts
magnetic
dynamo
permanent magnet
magnetic material
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
GB31553/49A
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 GB664902A publication Critical patent/GB664902A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

664,902. Machines with permanent magnets. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 8, 1949 [Dec. 18, 1948], No. 31553/49. Class 35. In orderto reducethe lossofmagnetization of a permanent magnet rotor of a dynamo when it is removed from or replaced in its stator, magnetic shunts 6 are provided in the rotor and placed between a cylindrical permanent magnet 1 which is radially polarized and polepieces 4, the iron magnetic circuit between the shunts 6 and the pole-pieces 4 being interrupted at 8. The shunts 6 are separated from the permanent magnet ends and from the polepieces 4 by felt washers 9 and by non-magnetic shims 8 respectively. To minimize any demagnetizing effect caused by sudden change in load a pair of bars 10 of non-magnetic material are axially placed so that the bars 10 and the shunts 6 form a short-circuit damping coil around the magnet 1. The output voltage of the dynamo can be adjusted by providing a ring 13 of magnetic material placed at one end of one shunt 6 but separated therefrom by shims 15 of non-magnetic material and of varying thickness.
GB31553/49A 1948-12-18 1949-12-08 Improvements in and relating to dynamo-electric machines Expired GB664902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US664902XA 1948-12-18 1948-12-18

Publications (1)

Publication Number Publication Date
GB664902A true GB664902A (en) 1952-01-16

Family

ID=22069824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31553/49A Expired GB664902A (en) 1948-12-18 1949-12-08 Improvements in and relating to dynamo-electric machines

Country Status (1)

Country Link
GB (1) GB664902A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587721A (en) * 1984-03-27 1986-05-13 General Electric Company Method of assembling a rotatable assembly, apparatus and method of operating such
US4608752A (en) * 1984-03-27 1986-09-02 General Electric Company Apparatus, method of operating apparatus and method of assembling a rotatable assembly
US4677744A (en) * 1984-03-27 1987-07-07 General Electric Company Apparatus for assembling a rotatable assembly
EP0260387A1 (en) * 1986-08-27 1988-03-23 Karl Heinz Rivoir Method for producing a magnet arrangement and magnet arrangement obtained by this method
GB2251736A (en) * 1990-12-07 1992-07-15 Weber Srl Securing pole pieces on permanent magnet rotor
EP1330010A1 (en) * 2000-09-01 2003-07-23 Matsushita Electric Industrial Co., Ltd. Electric motor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587721A (en) * 1984-03-27 1986-05-13 General Electric Company Method of assembling a rotatable assembly, apparatus and method of operating such
US4608752A (en) * 1984-03-27 1986-09-02 General Electric Company Apparatus, method of operating apparatus and method of assembling a rotatable assembly
US4677744A (en) * 1984-03-27 1987-07-07 General Electric Company Apparatus for assembling a rotatable assembly
EP0260387A1 (en) * 1986-08-27 1988-03-23 Karl Heinz Rivoir Method for producing a magnet arrangement and magnet arrangement obtained by this method
GB2251736A (en) * 1990-12-07 1992-07-15 Weber Srl Securing pole pieces on permanent magnet rotor
GB2251736B (en) * 1990-12-07 1995-03-15 Weber Srl Improved electric torque motor
EP1330010A1 (en) * 2000-09-01 2003-07-23 Matsushita Electric Industrial Co., Ltd. Electric motor
EP1330010A4 (en) * 2000-09-01 2007-06-20 Matsushita Electric Ind Co Ltd Electric motor

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