EP0309359A1 - Verfahren zur automatischen Einstellung der Induktivität von gewickelten Elementen mit einem Magnetkreis mit verstellbarem Luftspalt - Google Patents

Verfahren zur automatischen Einstellung der Induktivität von gewickelten Elementen mit einem Magnetkreis mit verstellbarem Luftspalt Download PDF

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Publication number
EP0309359A1
EP0309359A1 EP88402401A EP88402401A EP0309359A1 EP 0309359 A1 EP0309359 A1 EP 0309359A1 EP 88402401 A EP88402401 A EP 88402401A EP 88402401 A EP88402401 A EP 88402401A EP 0309359 A1 EP0309359 A1 EP 0309359A1
Authority
EP
European Patent Office
Prior art keywords
inductance
circuit
self
air gap
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.)
Granted
Application number
EP88402401A
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English (en)
French (fr)
Other versions
EP0309359B1 (de
Inventor
François Thommelin
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.)
Orega Electronique et Mecanique
Original Assignee
Orega Electronique et Mecanique
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 Orega Electronique et Mecanique filed Critical Orega Electronique et Mecanique
Publication of EP0309359A1 publication Critical patent/EP0309359A1/de
Application granted granted Critical
Publication of EP0309359B1 publication Critical patent/EP0309359B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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 present invention relates to a method for automatically adjusting the self-inductance of wound elements comprising an adjustable gap magnetic circuit.
  • Another known solution consists in depositing glue between the two ferrites and immobilizing them during the glue polymerization time after having carried out the electric adjustment of the self-inductance.
  • Such a process cannot be automated because the tolerance for maintaining the distance between the two ferrites is a few hundredths of a millimeter, and because it is mass production (for example 400 pieces per 'time), the parts must be moved during polymerization, which gives them vibrations and does not allow the required precision of the air gap adjustment to be reached.
  • an electrically conductive material such as graphite must be deposited on the inter-ferrite joint in order to ensure the electrical continuity between the ferrites, which requires a step and additional means to effect this deposition. .
  • the subject of the present invention is a method for easily adjusting the mutual spacing of the ferrites of a wound product, with a view to adjusting the self-inductance of this product, this method making it possible to obtain a high precision of the mutual spacing of the ferrites, this spacing not being liable to be modified before the mutual fixing of the ferrites, even when they are transferred from one work station to another, this process making it possible to obtain high production rates.
  • the method according to the invention consists in depositing on the air gap of the lower magnetic half-circuit provided with its coil at least two points of deferred setting adhesive, then at least two elements made of relatively soft non-magnetic material, electrically conductive, with almost zero elastic range, place the upper magnetic half-circuit on the lower, by exerting a slight pressure on the upper magnetic half-circuit, adjust the thickness of the air gap of the magnetic circuit by checking the value of the self-inductance of the wound product while the air gap elements are being crushed, and to maintain said low pressure during the setting time of the adhesive.
  • the air gap elements are lead balls.
  • the drawing shows a cylindrical coil 1 surrounded by a magnetic circuit comprising two half-ferrites in the shape of a "U", referenced 2, 3 respectively, but it is understood that the invention is not limited to such forms of coils and ferrites, and that it applies in all cases where one has to adjust the self-inductance of a wound product by adjusting the mutual distance of ferrites (or similar products) forming part of its magnetic circuit.
  • a movable support S one of the half-ferrites, for example the half-ferrite 2, which will be the lower half-ferrite, so that its air gap plane 4 (that is to say its planar face which is opposite the plane face of the other half-ferrite, and between which the air gap is defined) is horizontal.
  • the coil 1 is put in place on the ferrite 2.
  • a silicone pad 1A serving as a shock absorber.
  • each point of adhesive is deposited substantially in the center of the upper face (which is in the air gap) of each leg of the "U”.
  • the glue points are deposited diametrically opposite, in the middle of the width of the crown formed by the face upper of the lower ferrite.
  • a lead ball 7, 8 is placed in the middle of each point of glue 4, 5.
  • These balls have, for example, the shape of spheres with a diameter of approximately 1.2 mm. The diameter of these balls is slightly greater, about 0.5 to 1 mm, than the maximum value that the thickness of the air gap of the regulated coils can have (maximum value determined experimentally on a large series of coils).
  • the self-inductance of the product constituted by the coil 1 and its magnetic circuit 2, 3 is adjusted.
  • This adjustment is carried out by connecting the terminals of the coil 1 to a conventional inductance measuring device (not shown). and by applying to the ferrite 3 a force F of approximately 60 kg at most via a block 10 passing through the central opening 11 of the frame 9 and supported on the upper face of the ferrite 3.
  • This force F progressive , crushes the balls 7, 8, and is applied as long as the desired inductance is not reached, that is to say as long as the air gap between the ferrites 2, 3 is greater than the value corresponding to said inductance desired.
  • the adhesive used is electrically a good insulator, but, since its polymerization takes place only after a time which, although relatively short, is greater than the time for adjusting the inductance of the coil with its circuit magnetic, the pressure P induced by the crushing force applied to the balls 7, 8 (which are simply placed on the glue dots 5, 6) drives out the glue in the areas of the lower and upper caps of these balls which come into contact with the gap surfaces of the ferrites 2, 3. Thus, the electrical continuity is ensured between the ferrites 2, 3 via the balls 7, 8.
  • the break in electrical continuity between the ferrites thus produced is immediately detected, and the defective wound product (from the point of view of electrical continuity) can be easily identified and repaired off the production line.
  • the elements 9, 10 are not metallic, and are therefore electrically isolated from the support S (if the latter is itself metallic).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP19880402401 1987-09-25 1988-09-23 Verfahren zur automatischen Einstellung der Induktivität von gewickelten Elementen mit einem Magnetkreis mit verstellbarem Luftspalt Expired - Lifetime EP0309359B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8713288 1987-09-25
FR8713288A FR2621167B1 (fr) 1987-09-25 1987-09-25 Procede de reglage automatique de self-inductance d'elements bobines comportant un circuit magnetique a entrefer ajustable

Publications (2)

Publication Number Publication Date
EP0309359A1 true EP0309359A1 (de) 1989-03-29
EP0309359B1 EP0309359B1 (de) 1993-09-01

Family

ID=9355230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880402401 Expired - Lifetime EP0309359B1 (de) 1987-09-25 1988-09-23 Verfahren zur automatischen Einstellung der Induktivität von gewickelten Elementen mit einem Magnetkreis mit verstellbarem Luftspalt

Country Status (6)

Country Link
EP (1) EP0309359B1 (de)
JP (1) JP3107801B2 (de)
DE (1) DE3883677T2 (de)
ES (1) ES2042787T3 (de)
FR (1) FR2621167B1 (de)
TR (1) TR24086A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729040A1 (de) * 1995-02-22 1996-08-28 Minnesota Mining And Manufacturing Company Ferritkernmarkierung
EP0757364A2 (de) * 1995-08-01 1997-02-05 Deutsche Thomson-Brandt Gmbh Transformator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715323A1 (de) * 1994-12-01 1996-06-05 Vlt Corporation Induktanzwerteinstellung von magnetischen Komponenten
JP6450524B2 (ja) * 2014-04-09 2019-01-09 株式会社タムラ製作所 リアクトルとその製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100142A5 (en) * 1970-07-02 1972-03-17 Iskra Z Za Avtomatiz Adhesives fillers of controlled diam - to keep substates a given distance apart
GB2039156A (en) * 1978-11-29 1980-07-30 Hitachi Ltd Transformer
FR2457000A1 (fr) * 1979-05-14 1980-12-12 Victor Company Of Japan Dispositif a circuits magnetiques fermes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836488B2 (ja) * 1975-03-17 1983-08-09 日本電信電話株式会社 センリンクミタテホウホウ
JPS54127569A (en) * 1978-03-28 1979-10-03 Matsushita Electric Works Ltd Discharge lamp ballast
JPS5749378U (de) * 1980-09-08 1982-03-19
JPS60263412A (ja) * 1984-06-12 1985-12-26 Matsushita Electric Ind Co Ltd フライバツクトランス

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100142A5 (en) * 1970-07-02 1972-03-17 Iskra Z Za Avtomatiz Adhesives fillers of controlled diam - to keep substates a given distance apart
GB2039156A (en) * 1978-11-29 1980-07-30 Hitachi Ltd Transformer
FR2457000A1 (fr) * 1979-05-14 1980-12-12 Victor Company Of Japan Dispositif a circuits magnetiques fermes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729040A1 (de) * 1995-02-22 1996-08-28 Minnesota Mining And Manufacturing Company Ferritkernmarkierung
US5767816A (en) * 1995-02-22 1998-06-16 Minnesota Mining And Manufacturing Company Ferrite core marker
EP0757364A2 (de) * 1995-08-01 1997-02-05 Deutsche Thomson-Brandt Gmbh Transformator
EP0757364A3 (de) * 1995-08-01 1997-03-26 Deutsche Thomson-Brandt Gmbh Transformator

Also Published As

Publication number Publication date
ES2042787T3 (es) 1993-12-16
FR2621167B1 (fr) 1994-05-20
EP0309359B1 (de) 1993-09-01
JPH01107505A (ja) 1989-04-25
FR2621167A1 (fr) 1989-03-31
DE3883677D1 (de) 1993-10-07
DE3883677T2 (de) 1994-03-24
JP3107801B2 (ja) 2000-11-13
TR24086A (tr) 1991-03-04

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