FR2305833A2 - Core assembly for three limb transformer - without joints in flux path at core centre - Google Patents

Core assembly for three limb transformer - without joints in flux path at core centre

Info

Publication number
FR2305833A2
FR2305833A2 FR7509707A FR7509707A FR2305833A2 FR 2305833 A2 FR2305833 A2 FR 2305833A2 FR 7509707 A FR7509707 A FR 7509707A FR 7509707 A FR7509707 A FR 7509707A FR 2305833 A2 FR2305833 A2 FR 2305833A2
Authority
FR
France
Prior art keywords
core
centre
limbs
joints
flux path
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
FR7509707A
Other languages
French (fr)
Other versions
FR2305833B2 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7509707A priority Critical patent/FR2305833A2/en
Priority to DE19752521666 priority patent/DE2521666A1/en
Priority to BR7503994D priority patent/BR7503131A/en
Priority to JP6144275A priority patent/JPS50161623A/ja
Priority to GB2190875A priority patent/GB1515565A/en
Priority to BE165613A priority patent/BE840094A/en
Publication of FR2305833A2 publication Critical patent/FR2305833A2/en
Priority to US05/767,225 priority patent/US4085603A/en
Application granted granted Critical
Publication of FR2305833B2 publication Critical patent/FR2305833B2/fr
Granted 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
    • H01F27/25—Magnetic cores made from strips or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • 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
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
    • 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
    • H01F41/024—Manufacturing of magnetic circuits made from deformed sheets

Abstract

In the manufacture of star shaped three limb transformer cores it is required to eliminate undesirable air gaps at the core centre where the three limbs meet. This difficulty is overcome by making the limbs from a single piece of material. For example a ring of transformer core steel of appropriate diameter is placed in the centre of three rams (2). These rams are then driven inwards toward a common centre, and deform the ring into a three limbed star (1). A continuous iron path thus results. In an alternative form a V-shaped core element may be used thus giving continuity between adjacent limbs.
FR7509707A 1974-05-21 1975-03-27 Core assembly for three limb transformer - without joints in flux path at core centre Granted FR2305833A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7509707A FR2305833A2 (en) 1975-03-27 1975-03-27 Core assembly for three limb transformer - without joints in flux path at core centre
DE19752521666 DE2521666A1 (en) 1974-05-21 1975-05-15 STAR-SHAPED CORE ELEMENT FOR MAGNETIC FLOW FORMATION, PROCESS FOR ITS MANUFACTURING AND TRANSFORMER MANUFACTURED FROM IT
BR7503994D BR7503131A (en) 1974-05-21 1975-05-20 STAR MAGNETIC CIRCUIT ELEMENT, SAME MANUFACTURING PROCESS AND POLYPhasic ELECTRIC TRANSFORMER
JP6144275A JPS50161623A (en) 1974-05-21 1975-05-21
GB2190875A GB1515565A (en) 1974-05-21 1975-05-21 Star-shaped magnetic core elements
BE165613A BE840094A (en) 1975-03-27 1976-03-26 STAR MAGNETIC CIRCUIT ELEMENTS AND THEIR MANUFACTURING PROCESS
US05/767,225 US4085603A (en) 1974-05-21 1977-02-09 Method of making V-shaped magnetic circuit elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7509707A FR2305833A2 (en) 1975-03-27 1975-03-27 Core assembly for three limb transformer - without joints in flux path at core centre

Publications (2)

Publication Number Publication Date
FR2305833A2 true FR2305833A2 (en) 1976-10-22
FR2305833B2 FR2305833B2 (en) 1981-03-06

Family

ID=9153210

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7509707A Granted FR2305833A2 (en) 1974-05-21 1975-03-27 Core assembly for three limb transformer - without joints in flux path at core centre

Country Status (2)

Country Link
BE (1) BE840094A (en)
FR (1) FR2305833A2 (en)

Also Published As

Publication number Publication date
FR2305833B2 (en) 1981-03-06
BE840094A (en) 1976-09-27

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