EP0392202A3 - Use of a fine crystalline iron-based alloy as a magnet core in an interface transformer - Google Patents

Use of a fine crystalline iron-based alloy as a magnet core in an interface transformer Download PDF

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Publication number
EP0392202A3
EP0392202A3 EP19900104796 EP90104796A EP0392202A3 EP 0392202 A3 EP0392202 A3 EP 0392202A3 EP 19900104796 EP19900104796 EP 19900104796 EP 90104796 A EP90104796 A EP 90104796A EP 0392202 A3 EP0392202 A3 EP 0392202A3
Authority
EP
European Patent Office
Prior art keywords
based alloy
transformers
interface
isdn
fine
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.)
Granted
Application number
EP19900104796
Other languages
German (de)
French (fr)
Other versions
EP0392202B1 (en
EP0392202A2 (en
Inventor
Johannes Binkofski
Dietmar Grätzer
Giselher Dr. Herzer
Hans-Reiner Dr. Hilzinger
Jörg Dr. Petzold
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.)
Vacuumschmelze GmbH and Co KG
Original Assignee
Vacuumschmelze GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6378289&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0392202(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Vacuumschmelze GmbH and Co KG filed Critical Vacuumschmelze GmbH and Co KG
Publication of EP0392202A2 publication Critical patent/EP0392202A2/en
Publication of EP0392202A3 publication Critical patent/EP0392202A3/en
Application granted granted Critical
Publication of EP0392202B1 publication Critical patent/EP0392202B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

Im neuen digitalen Kommunikationssystem ISDN erfolgt die Übertragung zwischen dem Netzabschluß (2) und den Endgeräten (3) über die sogenannte S₀ - Schnittstelle durch Schnittstellen-Übertrager (6, 11). Da die Stromversorgung der Endgeräte zum Teil ebenfalls über diese Übertrager erfolgt, hat eine Stromunsymmetrie in den Leitungen (7, 8) bzw. (9, 10) eine Vormagnetisierung der Übertrager zur Folge. Die ISDN-Anforderungen an die Übertrager müssen somit auch bei einer Gleichstromvormagnetisierung erfüllt werden. Kompakte Übertrager mit einfachem Wicklungsaufbau, welche die ISDN-­ Anforderungen erfüllen, weisen als Magnetkernmaterial erfindungsgemäß eine feinkristalline Eisenbasislegierung mit einem Eisenanteil von mehr als 60 Atom-% auf, deren Gefüge zu mehr als 50 % aus feinkristallinen Körnern mit einer Korn­ größe von weniger als 100 nm besteht und die ein Remanenz­ verhältnis von weniger als 0,2 sowie eine Permeabilität im Bereich von 20 000 bis 50 000 aufweist. In the new digital communication system ISDN, the transmission between the network termination ( 2 ) and the terminals ( 3 ) takes place via the so-called S₀ interface through interface transmitters (6, 11). Since some of the terminals are also supplied with power by these transformers, a current asymmetry in lines (7, 8) or (9, 10) results in the transformers being premagnetized. The ISDN requirements for the transmitters must therefore also be met with DC bias. According to the invention, compact transformers with a simple winding structure that meet the ISDN requirements have a fine-crystalline iron-based alloy with an iron content of more than 60 atom%, the structure of which consists of more than 50% of fine-crystalline grains with a grain size of less than 100 nm exists and which has a remanence ratio of less than 0.2 and a permeability in the range from 20,000 to 50,000.

EP90104796A 1989-04-08 1990-03-14 Use of a fine crystalline iron-based alloy as a magnet core in an interface transformer Revoked EP0392202B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911618 1989-04-08
DE3911618A DE3911618A1 (en) 1989-04-08 1989-04-08 USE OF A FINE CRYSTALLINE IRON BASE ALLOY AS A MAGNETIC CORE MATERIAL FOR AN INTERFACE TRANSMITTER

Publications (3)

Publication Number Publication Date
EP0392202A2 EP0392202A2 (en) 1990-10-17
EP0392202A3 true EP0392202A3 (en) 1991-04-03
EP0392202B1 EP0392202B1 (en) 1996-06-12

Family

ID=6378289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104796A Revoked EP0392202B1 (en) 1989-04-08 1990-03-14 Use of a fine crystalline iron-based alloy as a magnet core in an interface transformer

Country Status (4)

Country Link
US (1) US5074932A (en)
EP (1) EP0392202B1 (en)
JP (1) JPH0828290B2 (en)
DE (2) DE3911618A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637038B1 (en) * 1993-07-30 1998-03-11 Hitachi Metals, Ltd. Magnetic core for pulse transformer and pulse transformer made thereof
JPH09246034A (en) * 1996-03-07 1997-09-19 Alps Electric Co Ltd Magnetic core for pulse transformer
DE19926699C2 (en) 1999-06-11 2003-10-30 Vacuumschmelze Gmbh High-pass branch of a crossover for ADSL systems
DE102004024337A1 (en) * 2004-05-17 2005-12-22 Vacuumschmelze Gmbh & Co. Kg Process for producing nanocrystalline current transformer cores, magnetic cores produced by this process, and current transformers with same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299498A1 (en) * 1987-07-14 1989-01-18 Hitachi Metals, Ltd. Magnetic core and method of producing same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193005A (en) * 1981-05-23 1982-11-27 Tdk Corp Amorphous magnetic alloy thin belt for choke coil and magnetic core for the same
JPS62179704A (en) * 1986-02-04 1987-08-06 Hitachi Metals Ltd Fe-based amorphous core excellent in controlling magnetization characteristics
US4881989A (en) * 1986-12-15 1989-11-21 Hitachi Metals, Ltd. Fe-base soft magnetic alloy and method of producing same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299498A1 (en) * 1987-07-14 1989-01-18 Hitachi Metals, Ltd. Magnetic core and method of producing same

Also Published As

Publication number Publication date
EP0392202B1 (en) 1996-06-12
DE59010366D1 (en) 1996-07-18
JPH0828290B2 (en) 1996-03-21
JPH02295101A (en) 1990-12-06
DE3911618A1 (en) 1990-10-18
EP0392202A2 (en) 1990-10-17
US5074932A (en) 1991-12-24

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