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DE59308340D1 - Method and device for demagnetizing magnetic materials - Google Patents

Method and device for demagnetizing magnetic materials

Info

Publication number
DE59308340D1
DE59308340D1 DE59308340T DE59308340T DE59308340D1 DE 59308340 D1 DE59308340 D1 DE 59308340D1 DE 59308340 T DE59308340 T DE 59308340T DE 59308340 T DE59308340 T DE 59308340T DE 59308340 D1 DE59308340 D1 DE 59308340D1
Authority
DE
Germany
Prior art keywords
magnetic field
capacitor
alternating magnetic
envelope
magnetic materials
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 - Fee Related
Application number
DE59308340T
Other languages
German (de)
Inventor
Martin Ing Beck
Soenke Dipl Ing Kahl
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.)
Felten and Guilleaume AG
Original Assignee
Felten and Guilleaume Energietechnik AG
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 Felten and Guilleaume Energietechnik AG filed Critical Felten and Guilleaume Energietechnik AG
Application granted granted Critical
Publication of DE59308340D1 publication Critical patent/DE59308340D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Treatment Devices (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

The invention assumes that the envelope of a decreasing alternating magnetic field for demagnetizing magnetic materials must be larger than can be achieved by conventional oscillating circuits. Accordingly, a gradually decreasing alternating magnetic field having a large decay factor is generated in an oscillating circuit (C1, L1, L2) in whose air-core coil (L1) the material is held. By specifically recharging the capacitor (C1) from a recharging capacitor (C2) by means of a power supply (LS2), the capacitor voltage (U1) is increased and the energy which is reduced by damping is resupplied synchronously with the oscillation process, so that the envelope E(t) of the alternating field is specifically enlarged and the duration of the decaying alternating magnetic field in the air-core coil (C1) is prolonged. <IMAGE>
DE59308340T 1992-11-07 1993-06-25 Method and device for demagnetizing magnetic materials Expired - Fee Related DE59308340D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4237704A DE4237704C1 (en) 1992-11-07 1992-11-07 Method and device for demagnetizing magnetic materials

Publications (1)

Publication Number Publication Date
DE59308340D1 true DE59308340D1 (en) 1998-05-07

Family

ID=6472386

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4237704A Expired - Fee Related DE4237704C1 (en) 1992-11-07 1992-11-07 Method and device for demagnetizing magnetic materials
DE59308340T Expired - Fee Related DE59308340D1 (en) 1992-11-07 1993-06-25 Method and device for demagnetizing magnetic materials

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE4237704A Expired - Fee Related DE4237704C1 (en) 1992-11-07 1992-11-07 Method and device for demagnetizing magnetic materials

Country Status (3)

Country Link
EP (1) EP0597181B1 (en)
AT (1) ATE164701T1 (en)
DE (2) DE4237704C1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005020933A1 (en) * 2005-05-04 2006-11-09 Stz Mechatronik Test body e.g. magnetic ring, de-magnetizing method for e.g. engine, involves determining end value of residual magnetization and iteratively repeating de-magnetization of body with counter field of adjusted force
DE102007009361B4 (en) * 2007-02-23 2012-02-16 Bundesrepublik Deutschland, vertr. d. d. Bundesministerium für Wirtschaft und Technologie, dieses vertr. d. d. Präsidenten der Physikalisch-Technischen Bundesanstalt Method and device for demagnetizing an object made of at least partially ferromagnetic material
CH717381B1 (en) * 2020-05-04 2022-10-31 Maurer Albert Electronic switching device for degaussing ferromagnetic bodies.
CH718185A1 (en) 2020-12-17 2022-06-30 Maurer Albert Electronic switching device and method for degaussing ferromagnetic material.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH582411A5 (en) * 1975-03-03 1976-11-30 Bbc Brown Boveri & Cie
IT1119003B (en) * 1979-06-25 1986-03-03 Riv Officine Di Villar Perosa DEMAGNETIZER DEVICE
DE3005927A1 (en) * 1980-02-16 1981-09-03 Erich Dr.-Ing. 5300 Bonn Steingroever DEMAGNETIZING PROCEDURE
US4471403A (en) * 1983-10-04 1984-09-11 The United States Of America As Represented By The United States Department Of Energy Biasing and fast degaussing circuit for magnetic materials

Also Published As

Publication number Publication date
EP0597181B1 (en) 1998-04-01
DE4237704C1 (en) 1993-09-30
ATE164701T1 (en) 1998-04-15
EP0597181A1 (en) 1994-05-18

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: FELTEN & GUILLEAUME AG, 51063 KOELN, DE

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee