GB669686A - Improvements in or relating to methods of re-magnetizing partly-demagnetized permanent magnets in alternators - Google Patents

Improvements in or relating to methods of re-magnetizing partly-demagnetized permanent magnets in alternators

Info

Publication number
GB669686A
GB669686A GB31666/49A GB3166649A GB669686A GB 669686 A GB669686 A GB 669686A GB 31666/49 A GB31666/49 A GB 31666/49A GB 3166649 A GB3166649 A GB 3166649A GB 669686 A GB669686 A GB 669686A
Authority
GB
United Kingdom
Prior art keywords
magnetizing
alternators
partly
relating
methods
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
GB31666/49A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB669686A publication Critical patent/GB669686A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/003—Methods and devices for magnetising permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

669,686. Magnetizing. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Dec. 9, 1949 [Dec. 13, 1948], No. 31666/49. Class 35. A permanent magnet A.C. generator is remagnetized by charging a condenser 9 through a rectifier 8 from the generator and subsequently discharging it through the generator armature windings 2 by means of a switch 11. The discharge may be done through a synchronized switch or the rotor may be brought to rest in the correct position. In cases of severe demagnetization the condenser voltage may be increased by charging through a transformer. Specification 456,373 is referred to.
GB31666/49A 1948-12-13 1949-12-09 Improvements in or relating to methods of re-magnetizing partly-demagnetized permanent magnets in alternators Expired GB669686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL669686X 1948-12-13

Publications (1)

Publication Number Publication Date
GB669686A true GB669686A (en) 1952-04-09

Family

ID=19798874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31666/49A Expired GB669686A (en) 1948-12-13 1949-12-09 Improvements in or relating to methods of re-magnetizing partly-demagnetized permanent magnets in alternators

Country Status (1)

Country Link
GB (1) GB669686A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2132862B1 (en) * 2007-03-23 2012-06-27 Vestas Wind Systems A/S Method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator and wind turbine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2132862B1 (en) * 2007-03-23 2012-06-27 Vestas Wind Systems A/S Method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator and wind turbine

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