EP0225830A1 - Verfahren zur Herstellung eines Magnetkreises mit schwachem magnetischem Streufeld, insbesondere für einen Kathodenstrahlrohr speisenden Hochspannungstransformator - Google Patents

Verfahren zur Herstellung eines Magnetkreises mit schwachem magnetischem Streufeld, insbesondere für einen Kathodenstrahlrohr speisenden Hochspannungstransformator Download PDF

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Publication number
EP0225830A1
EP0225830A1 EP86402674A EP86402674A EP0225830A1 EP 0225830 A1 EP0225830 A1 EP 0225830A1 EP 86402674 A EP86402674 A EP 86402674A EP 86402674 A EP86402674 A EP 86402674A EP 0225830 A1 EP0225830 A1 EP 0225830A1
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EP
European Patent Office
Prior art keywords
magnetic circuit
magnetic
air gap
circuits
voltage transformer
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
EP86402674A
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English (en)
French (fr)
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EP0225830B1 (de
Inventor
Joel Vincent
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Orega Electronique et Mecanique
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Orega Electronique et Mecanique
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Publication of EP0225830A1 publication Critical patent/EP0225830A1/de
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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
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the present invention relates to a magnetic circuit with a weak radiated magnetic field, in particular for a high voltage transformer supplying a cathode ray tube.
  • High-voltage transformers such as those used to supply cathode ray tubes generally have an air gap of well-defined value in their ferrite magnetic circuit. This air gap radiates a magnetic field producing harmful effects on the cathode ray tube, and even on other circuits which can pick them up by antenna effect.
  • the present invention relates to a magnetic circuit for a high voltage transformer whose radiation produced by the air gap is reduced to a minimum value and whose effects on the surrounding components or circuits are negligible, this magnetic circuit being easy and inexpensive to produce. , in particular for mass production, the value of the inductance, and in particular of the primary inductance of the transformer, is easy to adjust with low tolerances.
  • the magnetic circuit according to the invention comprises an air gap housed inside a coil, the thickness of this air gap being determined during the manufacture of the magnetic circuit by rectification the ends of the legs of the two half-circuits, which are then glued together, on the side of the air gap with the interposition of a shim of thickness practically equal to the thickness of the air gap desired, made of non-magnetic material, and on the opposite side directly on top of each other.
  • the magnetic circuit described below is intended for a high voltage transformer supplying a cathode ray tube, but it is understood that the invention is not limited to such an application, and can be used as well when it is desired to reduce magnetic radiation from a transformer or an inductance, only when you want to adjust the inductance value of a winding placed on a magnetic circuit to a precise value.
  • the magnetic circuit 1 shown in the drawing comprises two half-circuits 2, 3, made of ferrite, in the shape of a "U".
  • the ends of the legs of the half-circuits 2 and 3 are referenced 4, 5 and 6, 7 respectively.
  • the ends 4 and 6 of the legs of the half-circuits 2, 3 must come into close contact with one another so as to leave only a very reduced air gap, the residual air gap having a thickness of less than 0.1 mm after assembly by gluing.
  • the necessary air gap is created, by shortening, preferably by the same value, that is to say by the value of half the thickness of the air gap, the lengths of the legs having ends 5 and 7 (it is assumed that at the start the two legs of each "U" have the same length).
  • the front faces of the ends 4 to 7 are rectified so that, on the one hand, the ends 4 and 6 allow a regular minimum residual air gap to persist, and so that the air gap of desired value is obtained between the ends 5 and 7.
  • a wedge 8 of non-magnetic material is bonded between the ends 5 and 7, the thickness of which is practically equal to that of the desired air gap, taking into account the adhesive joint, this wedge only playing mechanical role.
  • the shim 8 is made of magnetic material, with magnetic characteristics different from those of the half-circuits 2 and 3 and / or of section different from that of the legs of these circuits, in order to obtain other possibilities for adjusting the inductance values of the windings arranged on this magnetic circuit.
  • a winding 9 with one or more windings (transform mateur or inductance) surrounds the ends 5 and 7 and the wedge 8.
  • the assembly of parts 2 and 3 and of the shim 8 is done using glue of the cold-bonding type with quick setting, making it possible to obtain joints with a thickness of less than 0.1 mm. It is also possible to fix the winding carcass on the ends 5 and 7 with the same adhesive.

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  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Soft Magnetic Materials (AREA)
  • Regulation Of General Use Transformers (AREA)
EP86402674A 1985-12-04 1986-12-02 Verfahren zur Herstellung eines Magnetkreises mit schwachem magnetischem Streufeld, insbesondere für einen Kathodenstrahlrohr speisenden Hochspannungstransformator Expired - Lifetime EP0225830B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8517948A FR2591024B1 (fr) 1985-12-04 1985-12-04 Circuit magnetique a faible champ magnetique rayonne, en particulier pour un transformateur haute tension alimentant un tube cathodique
FR8517948 1985-12-04

Publications (2)

Publication Number Publication Date
EP0225830A1 true EP0225830A1 (de) 1987-06-16
EP0225830B1 EP0225830B1 (de) 1993-03-31

Family

ID=9325439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402674A Expired - Lifetime EP0225830B1 (de) 1985-12-04 1986-12-02 Verfahren zur Herstellung eines Magnetkreises mit schwachem magnetischem Streufeld, insbesondere für einen Kathodenstrahlrohr speisenden Hochspannungstransformator

Country Status (6)

Country Link
EP (1) EP0225830B1 (de)
JP (1) JPS63502149A (de)
DE (1) DE3688181T2 (de)
ES (1) ES2039358T3 (de)
FR (1) FR2591024B1 (de)
WO (1) WO1987003736A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471864A1 (de) * 1990-08-17 1992-02-26 TDK Corporation Spulenelement
DE19528185A1 (de) * 1995-08-01 1997-02-06 Thomson Brandt Gmbh Transformator
WO2009114872A1 (en) * 2008-03-14 2009-09-17 Volterra Semiconductor Corporation Magnetic components with m-phase coupling, and related inductor structures
US7746209B1 (en) 2002-12-13 2010-06-29 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7893806B1 (en) 2002-12-13 2011-02-22 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7898379B1 (en) 2002-12-13 2011-03-01 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7965165B2 (en) 2002-12-13 2011-06-21 Volterra Semiconductor Corporation Method for making magnetic components with M-phase coupling, and related inductor structures
US8102233B2 (en) 2009-08-10 2012-01-24 Volterra Semiconductor Corporation Coupled inductor with improved leakage inductance control
US8237530B2 (en) 2009-08-10 2012-08-07 Volterra Semiconductor Corporation Coupled inductor with improved leakage inductance control
US8299885B2 (en) 2002-12-13 2012-10-30 Volterra Semiconductor Corporation Method for making magnetic components with M-phase coupling, and related inductor structures

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009064990A (ja) * 2007-09-07 2009-03-26 Sht Corp Ltd コイル装置
US9019063B2 (en) 2009-08-10 2015-04-28 Volterra Semiconductor Corporation Coupled inductor with improved leakage inductance control
CN105719825A (zh) * 2016-01-22 2016-06-29 深圳顺络电子股份有限公司 一种电感及其制造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927182A1 (de) * 1979-07-05 1981-01-08 Licentia Gmbh Transformator, insbesondere zeilentransformator fuer einen fernsehempfaenger
DE3040368A1 (de) * 1980-10-25 1982-05-27 Vogt Gmbh & Co Kg, 8391 Erlau Ferromagnetischer kern mit magnetisch gefuelltem luftspalt
FR2500679A3 (fr) * 1981-02-20 1982-08-27 Orega Cifte Procede de fabrication d'un transformateur d'impulsions et dispositif de reglage de son entrefer
DE3402278A1 (de) * 1984-01-24 1985-08-01 Vogt Gmbh & Co Kg, 8391 Erlau Abgleichbarer e-kern fuer induktivitaeten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952812A (ja) * 1982-09-20 1984-03-27 Matsushita Electric Ind Co Ltd フライバツクトランス
JPS59168608A (ja) * 1983-03-14 1984-09-22 Murata Mfg Co Ltd フライバツクトランスの製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927182A1 (de) * 1979-07-05 1981-01-08 Licentia Gmbh Transformator, insbesondere zeilentransformator fuer einen fernsehempfaenger
DE3040368A1 (de) * 1980-10-25 1982-05-27 Vogt Gmbh & Co Kg, 8391 Erlau Ferromagnetischer kern mit magnetisch gefuelltem luftspalt
FR2500679A3 (fr) * 1981-02-20 1982-08-27 Orega Cifte Procede de fabrication d'un transformateur d'impulsions et dispositif de reglage de son entrefer
DE3402278A1 (de) * 1984-01-24 1985-08-01 Vogt Gmbh & Co Kg, 8391 Erlau Abgleichbarer e-kern fuer induktivitaeten

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471864A1 (de) * 1990-08-17 1992-02-26 TDK Corporation Spulenelement
DE19528185A1 (de) * 1995-08-01 1997-02-06 Thomson Brandt Gmbh Transformator
US7893806B1 (en) 2002-12-13 2011-02-22 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7746209B1 (en) 2002-12-13 2010-06-29 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7772955B1 (en) 2002-12-13 2010-08-10 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7864016B1 (en) 2002-12-13 2011-01-04 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7898379B1 (en) 2002-12-13 2011-03-01 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
US7965165B2 (en) 2002-12-13 2011-06-21 Volterra Semiconductor Corporation Method for making magnetic components with M-phase coupling, and related inductor structures
US8299885B2 (en) 2002-12-13 2012-10-30 Volterra Semiconductor Corporation Method for making magnetic components with M-phase coupling, and related inductor structures
US8350658B1 (en) 2002-12-13 2013-01-08 Volterra Semiconductor Corporation Method for making magnetic components with N-phase coupling, and related inductor structures
WO2009114872A1 (en) * 2008-03-14 2009-09-17 Volterra Semiconductor Corporation Magnetic components with m-phase coupling, and related inductor structures
US8294544B2 (en) 2008-03-14 2012-10-23 Volterra Semiconductor Corporation Method for making magnetic components with M-phase coupling, and related inductor structures
US8102233B2 (en) 2009-08-10 2012-01-24 Volterra Semiconductor Corporation Coupled inductor with improved leakage inductance control
US8237530B2 (en) 2009-08-10 2012-08-07 Volterra Semiconductor Corporation Coupled inductor with improved leakage inductance control

Also Published As

Publication number Publication date
DE3688181T2 (de) 1993-07-08
WO1987003736A1 (fr) 1987-06-18
DE3688181D1 (de) 1993-05-06
ES2039358T3 (es) 1993-10-01
JPS63502149A (ja) 1988-08-18
FR2591024A1 (fr) 1987-06-05
FR2591024B1 (fr) 1988-01-08
EP0225830B1 (de) 1993-03-31

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