ATE164701T1 - METHOD AND DEVICE FOR DEMAGNETIZING MAGNETIC MATERIALS - Google Patents

METHOD AND DEVICE FOR DEMAGNETIZING MAGNETIC MATERIALS

Info

Publication number
ATE164701T1
ATE164701T1 AT93110179T AT93110179T ATE164701T1 AT E164701 T1 ATE164701 T1 AT E164701T1 AT 93110179 T AT93110179 T AT 93110179T AT 93110179 T AT93110179 T AT 93110179T AT E164701 T1 ATE164701 T1 AT E164701T1
Authority
AT
Austria
Prior art keywords
magnetic field
capacitor
alternating magnetic
envelope
magnetic materials
Prior art date
Application number
AT93110179T
Other languages
German (de)
Inventor
Martin Ing Beck
Soenke Dipl-Ing Kahl
Original Assignee
Felten & Guilleaume Energie
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 & Guilleaume Energie filed Critical Felten & Guilleaume Energie
Application granted granted Critical
Publication of ATE164701T1 publication Critical patent/ATE164701T1/en

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)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Developing Agents For Electrophotography (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>
AT93110179T 1992-11-07 1993-06-25 METHOD AND DEVICE FOR DEMAGNETIZING MAGNETIC MATERIALS ATE164701T1 (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
ATE164701T1 true ATE164701T1 (en) 1998-04-15

Family

ID=6472386

Family Applications (1)

Application Number Title Priority Date Filing Date
AT93110179T ATE164701T1 (en) 1992-11-07 1993-06-25 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
EP0597181A1 (en) 1994-05-18
DE59308340D1 (en) 1998-05-07
DE4237704C1 (en) 1993-09-30
EP0597181B1 (en) 1998-04-01

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Legal Events

Date Code Title Description
EEFA Change of the company name
REN Ceased due to non-payment of the annual fee