EP0042898B1 - Circuit magnétique feuilleté, à entrefer fixe et procédé d'ajustage de l'entrefer - Google Patents

Circuit magnétique feuilleté, à entrefer fixe et procédé d'ajustage de l'entrefer Download PDF

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Publication number
EP0042898B1
EP0042898B1 EP80400979A EP80400979A EP0042898B1 EP 0042898 B1 EP0042898 B1 EP 0042898B1 EP 80400979 A EP80400979 A EP 80400979A EP 80400979 A EP80400979 A EP 80400979A EP 0042898 B1 EP0042898 B1 EP 0042898B1
Authority
EP
European Patent Office
Prior art keywords
air gap
magnetic circuit
obtuse angle
end bars
laminated magnetic
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
Application number
EP80400979A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0042898A1 (fr
Inventor
Gilles Desombre
Marc Dujardin
Gérard Haroux
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.)
Sa Clarel
Original Assignee
Sa Clarel
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 Sa Clarel filed Critical Sa Clarel
Priority to EP80400979A priority Critical patent/EP0042898B1/fr
Priority to DE8080400979T priority patent/DE3069353D1/de
Priority to AT80400979T priority patent/ATE9749T1/de
Priority to DK244581A priority patent/DK244581A/da
Priority to IE1423/81A priority patent/IE51834B1/en
Priority to FI812017A priority patent/FI75446C/fi
Priority to NO812219A priority patent/NO812219L/no
Priority to PT73282A priority patent/PT73282B/pt
Priority to GR65383A priority patent/GR74360B/el
Priority to ES1981272474U priority patent/ES272474Y/es
Publication of EP0042898A1 publication Critical patent/EP0042898A1/fr
Application granted granted Critical
Publication of EP0042898B1 publication Critical patent/EP0042898B1/fr
Expired 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
    • 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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the subject of the present invention is a laminated magnetic circuit with a fixed gap, composed of an E-shaped part and a 1-shaped part and in which the length of the end bars of the E-shaped part determines the thickness of the air gap in front of the middle bar of this part in E.
  • the object of the invention is such a laminated circuit suitable for example for a ballast for fluorescent lamps having high guarantees of maintenance of its reactance value during the service life and offering facilities for adjusting the reactance value during its manufacture.
  • the magnetic circuit according to the invention is characterized in that the side of the part in I resting on the end bars of the part in E forms with the sides at the end of the part in 1 an obtuse angle and in this that the two end bars of the part in E each have an extension disposed one of the other at the distance of the length of the part in 1 to embrace the part in I by marrying said obtuse angle.
  • Figure 1 of the drawing is a section of a magnetic circuit according to the invention, carried out between two laminating lamellas of the parts at E and at I.
  • Figure 2 is a view of a sheet to be cut.
  • a part at E comprising two end arms 2 and a median arm 3 shorter than the thickness of the air gap is covered with a part at 1 4.
  • the side of part 4 resting on the bars 2 form with the sides at the end of the part 4 an obtuse angle ⁇ .
  • the two bars 2 each have an extension 5.
  • the two extensions 5 are arranged one from the other at the distance of the length of the part 4 to embrace the part 4 by marrying the obtuse angle ⁇ . Thanks to this arrangement, the part 4 is kept correctly centered on the part in E.
  • the dimensions are chosen so that the span is ensured between the ends of the part 4 in I and the parts of the bars 2 parallel to the end of the middle arm and that a slight wedging is ensured between part 4 and the oblique parts of the extensions 5, so that the main flow finds a sufficient passage section and that the dispersion flow at the location of the contacts between part 4 and bars 2 is reduced to a very low value.
  • the lines of this dispersion flux do not pass through the housing 1 and do not generate noise.
  • the obtuse angle ⁇ is for example from 91 to 120 °. It is chosen relatively close to a right angle, in order to prevent part 4 from detaching from the part at E.
  • part 4 is kept centered with respect to the part at E, it is easy to adjust the mean value of the air gap or what amounts to the same value of the reactance if it is the magnetic circuit of a ballast choke for example. To do this, it suffices to deform by punctual depressions dosed and limited in one or more places one or more lamellas of the lamination of the part 4 in I so that they approach the bar 3.
  • the fact of proceeding by punctual depressions, equidistant or not, makes it possible not to introduce a distant material, plastically deformable in the air gap, such as aluminum, as is done for example if the entire part in I is the subject of a depression .
  • impregnation channels are thus reserved along not only the air gap and the coil, but also holes 6 which provide a channel d 'impregnation in a particularly critical location likely to be a source of noise, because it is opposite the air gap.
  • Immature impregnation channels are provided between the ends of the arms 2 and the housing where any pressure in the direction of part 4 is avoided so as not to compromise the main contact between the parts at E and at I.
  • the invention also makes it possible to obtain greater precision of the air gap from the start.
  • the faces defining the air gap are cut by a punching (hatched surface 9) much more precise than a shearing which takes place along line 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Composite Materials (AREA)
  • Chemical & Material Sciences (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Paper (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Magnetic Heads (AREA)
  • Control Of Electric Motors In General (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electron Tubes For Measurement (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Magnetic Treatment Devices (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Traffic Control Systems (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
EP80400979A 1980-06-30 1980-06-30 Circuit magnétique feuilleté, à entrefer fixe et procédé d'ajustage de l'entrefer Expired EP0042898B1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP80400979A EP0042898B1 (fr) 1980-06-30 1980-06-30 Circuit magnétique feuilleté, à entrefer fixe et procédé d'ajustage de l'entrefer
DE8080400979T DE3069353D1 (en) 1980-06-30 1980-06-30 Laminated magnetic circuit with air gap, and method of adjusting the air gap
AT80400979T ATE9749T1 (de) 1980-06-30 1980-06-30 Geblechter magnetkern mit luftspalt und verfahren zum justieren des luftspalts.
DK244581A DK244581A (da) 1980-06-30 1981-06-03 Lamelleret magnetisk kreds med fast spalte og fremgangsmaade ved justering af spaltens middelstoerrelse
IE1423/81A IE51834B1 (en) 1980-06-30 1981-06-26 A laminated magnetic circuit with fixed air gap and procedure for adjustment thereof
FI812017A FI75446C (fi) 1980-06-30 1981-06-26 Magnetisk skivkrets med fast luftgap och regleringsfoerfarande foer luftgapet.
NO812219A NO812219L (no) 1980-06-30 1981-06-29 Laminert magnetisk krets med fast luftspalte og fremgangsmaate ved innstilling av luftspalten
PT73282A PT73282B (fr) 1980-06-30 1981-06-29 Circuit magnetique feuillete a entrefer fixe et procede d'ajustage de l'entrefer moyen de celui-ci
GR65383A GR74360B (el) 1980-06-30 1981-06-30 Φυλλωδες μαγνητικον κυκλωμα, μετα σταθερου διακενου αερος και μεθοδος προσαρμογης του μεσου διακενου αερος αυτου
ES1981272474U ES272474Y (es) 1980-06-30 1981-06-30 Circuito magnetico de chapas, de entrehierro fijo.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80400979A EP0042898B1 (fr) 1980-06-30 1980-06-30 Circuit magnétique feuilleté, à entrefer fixe et procédé d'ajustage de l'entrefer

Publications (2)

Publication Number Publication Date
EP0042898A1 EP0042898A1 (fr) 1982-01-06
EP0042898B1 true EP0042898B1 (fr) 1984-10-03

Family

ID=8187379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400979A Expired EP0042898B1 (fr) 1980-06-30 1980-06-30 Circuit magnétique feuilleté, à entrefer fixe et procédé d'ajustage de l'entrefer

Country Status (10)

Country Link
EP (1) EP0042898B1 (da)
AT (1) ATE9749T1 (da)
DE (1) DE3069353D1 (da)
DK (1) DK244581A (da)
ES (1) ES272474Y (da)
FI (1) FI75446C (da)
GR (1) GR74360B (da)
IE (1) IE51834B1 (da)
NO (1) NO812219L (da)
PT (1) PT73282B (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4480377A (en) * 1982-09-27 1984-11-06 General Motors Corporation Method of making an ignition coil core
DE19645098C2 (de) * 1996-11-01 2000-09-21 Vossloh Schwabe Gmbh Drossel und Verfahren zu deren Herstellung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1054551A (da) * 1954-02-11
FR942323A (fr) * 1941-01-28 1949-02-04 Thomson Houston Comp Francaise Perfectionnements à la construction des noyaux magnétiques
US3071744A (en) * 1954-12-14 1963-01-01 Advance Transformer Co Electromagnetic core construction
US3219957A (en) * 1957-12-03 1965-11-23 Advance Transformer Co Core for electromagnetic device
DE1638944A1 (de) * 1967-02-09 1970-05-14 Waasner B Kernblech mit zwei Blechteilen
DE1613628A1 (de) * 1967-03-20 1970-07-30 Blum Eisen & Metallind Zweiteiliger Eisenkern,insbesondere fuer Transformatoren
DE1929566A1 (de) * 1968-06-27 1970-06-18 Idec Izumi Corp Transformatorkern und Verfahren zu seiner Herstellung
GB1345523A (en) * 1970-09-10 1974-01-30 Friedland Ltd V E Doggart J Sk Transformer laminations

Also Published As

Publication number Publication date
GR74360B (el) 1984-06-27
EP0042898A1 (fr) 1982-01-06
PT73282B (fr) 1982-07-01
IE51834B1 (en) 1987-04-15
FI75446C (fi) 1988-06-09
NO812219L (no) 1982-01-04
ES272474Y (es) 1984-10-01
FI812017L (fi) 1981-12-31
PT73282A (fr) 1981-07-01
ES272474U (es) 1984-03-01
DK244581A (da) 1981-12-31
FI75446B (fi) 1988-02-29
ATE9749T1 (de) 1984-10-15
DE3069353D1 (en) 1984-11-08
IE811423L (en) 1981-12-30

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