EP0580131A3 - - Google Patents

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Publication number
EP0580131A3
EP0580131A3 EP19930111617 EP93111617A EP0580131A3 EP 0580131 A3 EP0580131 A3 EP 0580131A3 EP 19930111617 EP19930111617 EP 19930111617 EP 93111617 A EP93111617 A EP 93111617A EP 0580131 A3 EP0580131 A3 EP 0580131A3
Authority
EP
European Patent Office
Prior art keywords
laminate
shaped
stack
core
another
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
EP19930111617
Other versions
EP0580131A2 (en
EP0580131B1 (en
Inventor
Jakob Marti-Hefti
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.)
Knobel AG Lichttechnische Komponenten
Original Assignee
Knobel AG Lichttechnische Komponenten
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 Knobel AG Lichttechnische Komponenten filed Critical Knobel AG Lichttechnische Komponenten
Publication of EP0580131A2 publication Critical patent/EP0580131A2/en
Publication of EP0580131A3 publication Critical patent/EP0580131A3/xx
Application granted granted Critical
Publication of EP0580131B1 publication Critical patent/EP0580131B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Electromagnets (AREA)

Abstract

The laminate stack (1) of a transformer or an inductor is formed by U-shaped core laminates (2, 3) which are arranged located adjacent to one another and are fastened to one another in such a manner that an E-shaped core laminate stack is formed, limbs (14, 15), which are in each case shorter, of each U laminate together forming the centre limb of the E laminate. The core laminate stack is in each case completed by an I-shaped magnetic return path laminate (4). The U-shaped laminates are connected to one another, for example by welding. The composition of the E-shaped core laminate stack from two U-shaped core laminate stacks results in considerably greater freedom in stamping, since, in this case, only U-shaped laminates need to be stamped. This allows the stamping to be carried out such that the U-limbs point in the rolling direction of the core laminate material strip. This results in considerably improved magnetic properties of the core laminate stack. <IMAGE>
EP93111617A 1992-07-20 1993-07-20 Methof for making a choke or a transformer with E-shaped core laminations formed of two U-shaped laminations Expired - Lifetime EP0580131B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH228492 1992-07-20
CH2284/92 1992-07-20

Publications (3)

Publication Number Publication Date
EP0580131A2 EP0580131A2 (en) 1994-01-26
EP0580131A3 true EP0580131A3 (en) 1994-03-23
EP0580131B1 EP0580131B1 (en) 1995-11-08

Family

ID=4230175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93111617A Expired - Lifetime EP0580131B1 (en) 1992-07-20 1993-07-20 Methof for making a choke or a transformer with E-shaped core laminations formed of two U-shaped laminations

Country Status (4)

Country Link
EP (1) EP0580131B1 (en)
AT (1) ATE130119T1 (en)
DE (1) DE59300886D1 (en)
ES (1) ES2079925T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07297055A (en) * 1994-04-26 1995-11-10 Matsushita Electric Ind Co Ltd Choke coil
US6975049B2 (en) 2003-10-29 2005-12-13 A. O. Smith Corporation Electrical machine and method of manufacturing the same
DE102004012436B4 (en) * 2004-03-12 2006-04-20 Vossloh-Schwabe Deutschland Gmbh Core sheet for inductive component

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2120827A5 (en) * 1970-12-28 1972-08-18 Elektro Apparat Knobel
GB1328160A (en) * 1969-12-09 1973-08-30 Zumtobel W Transformers or chokes
DE2638369A1 (en) * 1976-08-26 1978-03-02 Bernhard Philberth Iron core system for transformers and inductors - has three limbs and two yokes with specified widths related to width of middle limb
GB2048575A (en) * 1979-05-04 1980-12-10 Thorn Electrical Ind Ltd Electrical choke or transformer
DE3402036C1 (en) * 1984-01-21 1985-07-11 Schwabe GmbH & Co KG Elektrotechnische Fabrik, 7067 Urbach Method for producing E-shaped core laminates and I-shaped magnetic return path laminates of an inductor or of a transformer, especially for gas-discharge lamps
DE3727457A1 (en) * 1987-08-18 1989-03-02 Waasner Elektrotechnische Fabr Three-phase transformer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1328160A (en) * 1969-12-09 1973-08-30 Zumtobel W Transformers or chokes
FR2120827A5 (en) * 1970-12-28 1972-08-18 Elektro Apparat Knobel
DE2638369A1 (en) * 1976-08-26 1978-03-02 Bernhard Philberth Iron core system for transformers and inductors - has three limbs and two yokes with specified widths related to width of middle limb
GB2048575A (en) * 1979-05-04 1980-12-10 Thorn Electrical Ind Ltd Electrical choke or transformer
DE3402036C1 (en) * 1984-01-21 1985-07-11 Schwabe GmbH & Co KG Elektrotechnische Fabrik, 7067 Urbach Method for producing E-shaped core laminates and I-shaped magnetic return path laminates of an inductor or of a transformer, especially for gas-discharge lamps
DE3727457A1 (en) * 1987-08-18 1989-03-02 Waasner Elektrotechnische Fabr Three-phase transformer

Also Published As

Publication number Publication date
DE59300886D1 (en) 1995-12-14
ATE130119T1 (en) 1995-11-15
EP0580131A2 (en) 1994-01-26
EP0580131B1 (en) 1995-11-08
ES2079925T3 (en) 1996-01-16

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