EP0216076B1 - Coil arrangement with adjustable pre-magnetisation - Google Patents

Coil arrangement with adjustable pre-magnetisation Download PDF

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Publication number
EP0216076B1
EP0216076B1 EP86110440A EP86110440A EP0216076B1 EP 0216076 B1 EP0216076 B1 EP 0216076B1 EP 86110440 A EP86110440 A EP 86110440A EP 86110440 A EP86110440 A EP 86110440A EP 0216076 B1 EP0216076 B1 EP 0216076B1
Authority
EP
European Patent Office
Prior art keywords
coil
arrangement according
coil arrangement
magnet
permanent magnet
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 - Lifetime
Application number
EP86110440A
Other languages
German (de)
French (fr)
Other versions
EP0216076A2 (en
EP0216076A3 (en
Inventor
Anton Dipl.-Ing.(Fh) Schmeller
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.)
Vogt Electronic AG
Original Assignee
Vogt Electronic AG
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 Vogt Electronic AG filed Critical Vogt Electronic AG
Priority to AT86110440T priority Critical patent/ATE50664T1/en
Publication of EP0216076A2 publication Critical patent/EP0216076A2/en
Publication of EP0216076A3 publication Critical patent/EP0216076A3/en
Application granted granted Critical
Publication of EP0216076B1 publication Critical patent/EP0216076B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only

Definitions

  • the invention relates to a coil arrangement according to the introductory part of patent claim 1.
  • the known coil arrangements of this type two permanent magnets are provided as the permanent magnet arrangement, which are rotatably and elastically held at the opposite ends of the magnetizable core and are magnetized in such a way that the premagnetization of the core changes when one or the other is rotated in order to be able to compensate for sample variations in tubes and circuits.
  • the known coil arrangements, with their two magnets represent a complicated structure with a relatively large space requirement, which requires a high manufacturing expenditure. For this reason, fixed coil arrangements were used where less accuracy was sufficient.
  • the invention has for its object to provide a coil assembly according to the introductory part of claim 1, which is characterized by a machine-compatible construction and can thus be manufactured in a simple and inexpensive manner so that it instead of the fixed coil assemblies at a comparable price with a about the same small amount of space is available for purposes where higher accuracy requirements have to be met.
  • the coil arrangement according to the invention is characterized by a simple structure comparable to the permanently set coil arrangements, but, unlike this, allows the unavoidable production variations in the magnetic field strength and the saturation magnetization to be compensated, this adjustment being able to be carried out automatically without any problems during the course of production.
  • the coil arrangement according to the invention is particularly well suited for use as a linearity coil for linearizing the deflection current in viewing devices with cathode ray tubes, in which the linear linear coils used for normal television sets cannot be used satisfactorily because of the higher demands on the linearity of lines (subclaim 11). .
  • the dependent claims 2 to 10 have preferred embodiments of the coil arrangement according to claim 1 to the subject.
  • the threaded connection between the bobbin and the magnet according to claim 2 and 3 allows a quick precise adjustment of the magnet against the core, whereby the air gap can be precisely adjusted according to the requirements of the inductance variation.
  • the sub-claims 5 to 7 indicate advantageous core forms.
  • the sub-claim 7 relates to a preferred embodiment of the coil body.
  • the sub-claims 8 to 10 are directed to preferred core materials.
  • FIG. 1 The z. B. coil arrangement that can be used as a linearity coil is shown in FIG. 1 in longitudinal section along section line I - in FIG. 2 and in FIG. 2 in longitudinal section along section line 11-11 in FIG. 1.

Landscapes

  • Magnetic Resonance Imaging Apparatus (AREA)
  • Details Of Television Scanning (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Magnetic Treatment Devices (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1. Coil arrangement with a magnetically saturable core surrounded by a coil and a permanent magnet arrangement, wherein the permanent magnet arrangement and the core are one adjustable relative to the other for the variable polarisation of the latter, characterised thereby, that the permanent magnet arrangement consists of a single permanent magnet (3) kept at a spacing from the saturable core while forming an air gap (4) and the width of the air gap (4) is adjustable.

Description

Die Erfindung bezieht sich auf eine Spulenanordnung gemäß dem einleitenden Teil des Patentanspruchs 1.The invention relates to a coil arrangement according to the introductory part of patent claim 1.

Bei den bekannten Spulenanordnungen dieser Art sind als Permanentmagnetanordnung zwei Permanentmagnete vorgesehen, die an den entgegengesetzten Enden des magnetisierbaren Kernes drehbar elastisch in Anlage gehalten und so magnetisiert sind, das sich die Vormagnetisierung des Kernes ändert, wenn der eine/und oder andere von ihnen gedreht wird, um Exemplarstreuungen von Röhren und Schaltungen ausgleichen zu können. Die bekannten Spulenanordnungen stellen mit ihren beiden Magneten ein kompliziertes Gebilde mit einem relativ großen Raumbedarf dar, das einen hohen Herstellungsaufwand erfordert. Aus diesem Grunde wurden dort, wo eine geringere Genauigkeit ausreichte, fest eingestellte Spulenanordnungen benutzt.In the known coil arrangements of this type, two permanent magnets are provided as the permanent magnet arrangement, which are rotatably and elastically held at the opposite ends of the magnetizable core and are magnetized in such a way that the premagnetization of the core changes when one or the other is rotated in order to be able to compensate for sample variations in tubes and circuits. The known coil arrangements, with their two magnets, represent a complicated structure with a relatively large space requirement, which requires a high manufacturing expenditure. For this reason, fixed coil arrangements were used where less accuracy was sufficient.

Der Erfindung liegt die Aufgabe zugrunde, eine Spulenanordnung gemäß dem einleitenden Teil des Patentanspruchs 1 zu schaffen, die sich durch einen automatengerechten Aufbau auszeichnet und damit auf einfache und preisgünstige Weise hergestellt werden kann so das sie anstelle der fest eingestellten Spulenanordnungen zu einem vergleichbaren Preis mit einem etwa gleichen geringen Raumbedarf für Zwecke zur Vergung steht, wo höhere Genauigkeitsanforderungen zu erfüllen sind.The invention has for its object to provide a coil assembly according to the introductory part of claim 1, which is characterized by a machine-compatible construction and can thus be manufactured in a simple and inexpensive manner so that it instead of the fixed coil assemblies at a comparable price with a about the same small amount of space is available for purposes where higher accuracy requirements have to be met.

Die vorstehende Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruchs 1 genannten Merkmale gelöst.The above object is achieved by the features mentioned in the characterizing part of patent claim 1.

Die erfindungsgemäße Spulenanordnung zeichnet sich durch einen mit den fest eingestellten Spulenanordnungen vergleichbaren einfachen Aufbau aus, gestattet aber anders als diese den Ausgleich der unvermeidlichen Fertigungsstreuungen in der Magnetfeldstärke und der Sättigungsmagnetisierung, wobei dieser Abgleich problemlos automatisch im Zuge der Herstellung vorgenommen werden kann.The coil arrangement according to the invention is characterized by a simple structure comparable to the permanently set coil arrangements, but, unlike this, allows the unavoidable production variations in the magnetic field strength and the saturation magnetization to be compensated, this adjustment being able to be carried out automatically without any problems during the course of production.

Aufgrund der vorgenannten Eigenschaften der erfindungsgemäßen Spulenanordnung eignet sich diese besonders gut für den Einsatz als Linearitätsspule zur Linearisierung des Ablenkstromes in Sichtgeräten mit Katodenstrahlröhren bei denen die für normale Fernsehgeräte benutzten fest eingestellten Linearitätspulen wegen der höheren Anforderungen an die Zeilenlinearität nicht zufriedenstellend einsetzbar sind (Unteranspruch 11).Due to the above-mentioned properties of the coil arrangement according to the invention, it is particularly well suited for use as a linearity coil for linearizing the deflection current in viewing devices with cathode ray tubes, in which the linear linear coils used for normal television sets cannot be used satisfactorily because of the higher demands on the linearity of lines (subclaim 11). .

Die Unteransprüche 2 bis 10 haben bevorzugte Ausführungsformen der Spulenanordnung gemäß Patentanspruch 1 zum Gegenstand.The dependent claims 2 to 10 have preferred embodiments of the coil arrangement according to claim 1 to the subject.

Die Gewindeverbindung zwischen Spulenkörper und Magnet gemäß Anspruch 2 und 3 erlaubt eine zügige präzise Verstellung des Magneten gegenü}er dem Kern, womit der Luftspalt entsprechend den Erfordernissen der Induktivitätsvariation genau einstellbar ist.The threaded connection between the bobbin and the magnet according to claim 2 and 3 allows a quick precise adjustment of the magnet against the core, whereby the air gap can be precisely adjusted according to the requirements of the inductance variation.

Die Unteransprüche 5 bis 7 geben vorteilhafte Kernformen an.The sub-claims 5 to 7 indicate advantageous core forms.

Der Unteranspruch 7 betrifft eine bevorzugte Ausgestaltung des Spulenkörpers.The sub-claim 7 relates to a preferred embodiment of the coil body.

Die Unteransprüche 8 bis 10 sind auf bevorzugte Kernmaterialien gerichtet.The sub-claims 8 to 10 are directed to preferred core materials.

Die erfindungsgemäße Spulenanordnung wird nachstehend anhand der Zeichnung an einem Ausführungsbeispiel noch näher erlätert. Die z. B. als Linearitätsspule verwendbare Spulenanordnung ist in Fig. 1 im Längsschnitt entlang der Schnittlinie I - in Fig. 2 und in Fig. 2 im Längsschnitt entlang der Schnittlinie 11 - 11 in Fig. 1 dargestellt.The coil arrangement according to the invention is explained in more detail below with reference to the drawing using an exemplary embodiment. The z. B. coil arrangement that can be used as a linearity coil is shown in FIG. 1 in longitudinal section along section line I - in FIG. 2 and in FIG. 2 in longitudinal section along section line 11-11 in FIG. 1.

Die Fig. 3 zeigt beispielhaft eine Kurvenschar der Induktivitätsvariation ü}er dem Strom in Abhängigkeit vom Luftspalt.3 shows an example of a family of curves of the inductance variation over the current as a function of the air gap.

In der Zeichnung ist nur die Kernform mit H-förmigem Querschnitt dargestellt. Die anderen Kernformen gemäß den Unteransprüchen 5 und 6 ergeben sich daraus sinngemäß.In the drawing, only the core shape with an H-shaped cross section is shown. The other core forms according to subclaims 5 and 6 result accordingly.

In Fig. 1 und 2 bedeuten:

  • (1) sättigbarer (Ferrit)-Kern
  • (2) Spulenkörper
  • (3) Magnet
  • (4) Luftspalt
  • (5) Spule
  • (6) Spulenanschlüsse
  • (7) Außengewinde des Magneten
  • (8) Innengewinde im Spulenkörper (2).
1 and 2 mean:
  • (1) saturable (ferrite) core
  • (2) bobbin
  • (3) magnet
  • (4) air gap
  • (5) coil
  • (6) Coil connections
  • (7) External thread of the magnet
  • (8) Internal thread in the bobbin (2).

Claims (11)

1. Coil arrangement with a magnetically saturable core surrounded by a coil and a permanent magnet arrangement, wherein the permanent magnet arrangement and the core are one adjustable relative to the other for the variable polarisation of the latter, characterised thereby, that the permanent magnet arrangement consists of a single permanent magnet (3) kept at a spacing from the saturable core while forming an air gap (4) and the width of the air gap (4) is adjustable.
2. Coil arrangement according to claim 1, characterised thereby, that the adjustment of the air gap (4) takes place by means of an internal thread (8) in the coil body (2) and an external thread (7) at the magnet (3).
3. Coil arrangement according to claim 2, characterised thereby, that the internal thread (8) is formed by elastic webs at the coil body (2).
4. Coil arrangement according to one of the preceding claims, characterised thereby, that the saturable core (1) displays an H-shaped cross- section.
5. Coil arrangement according to one of the claims 1 to 3, characterised thereby, that the saturable core (1) displays the shape of a thread reel.
6. Coil arrangement according to one of the preceding claims, characterised thereby, that the saturable core (1) is a mushroom core.
7. Coil arrangement according to one of the preceding claims, characterised thereby, that the coil body (2) surrounds the entire structure.
8. Coil arrangement according to one of the preceding claims, characterised thereby, that the magnet (3) consists of isotropic ferrite.
9. Coil arrangement according to one of the preceding claims, characterised thereby, that the magnet (3) consists of anisotropic ferrite.
10. Coil arrangement according to one of the preceding claims, characterised thereby, that the magnet (3) is a rare earth magnet which is housed in a synthetic material part with external thread.
11. Use of the coil arrangement according to one of the preceding claims for the linearisation of the deflecting current in visual devices with cathode ray tubes.
EP86110440A 1985-09-27 1986-07-29 Coil arrangement with adjustable pre-magnetisation Expired - Lifetime EP0216076B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86110440T ATE50664T1 (en) 1985-09-27 1986-07-29 COIL ARRANGEMENT WITH VARIABLE PREMAGNETIZATION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853534451 DE3534451A1 (en) 1985-09-27 1985-09-27 ADJUSTABLE LINEARITY COIL
DE3534451 1985-09-27

Publications (3)

Publication Number Publication Date
EP0216076A2 EP0216076A2 (en) 1987-04-01
EP0216076A3 EP0216076A3 (en) 1988-01-07
EP0216076B1 true EP0216076B1 (en) 1990-02-28

Family

ID=6282092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110440A Expired - Lifetime EP0216076B1 (en) 1985-09-27 1986-07-29 Coil arrangement with adjustable pre-magnetisation

Country Status (3)

Country Link
EP (1) EP0216076B1 (en)
AT (1) ATE50664T1 (en)
DE (1) DE3534451A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE923858C (en) * 1951-04-05 1955-02-21 Philips Nv Coil with a core pre-magnetized by a permanent magnet
DE1007394B (en) * 1951-12-29 1957-05-02 Philips Nv Coil system with at least one high frequency coil with a pre-magnetized rod core
DE1188718B (en) * 1962-04-05 1965-03-11 Telefunken Patent Coil with core and two movable permanent magnets, especially linearity regulator for television receivers
JPS5814665U (en) * 1981-07-21 1983-01-29 日本ビクター株式会社 picture tube deflection device
JPS5835847A (en) * 1981-08-27 1983-03-02 Toshiba Corp Coil assembly for camera tube
US4393361A (en) * 1981-09-23 1983-07-12 Prem Magnetics, Inc. Variable magnetically biased linearity control
JPS5897809A (en) * 1981-12-08 1983-06-10 Matsushita Electric Ind Co Ltd Magnetic saturated variable inductor
JPS60206008A (en) * 1984-03-29 1985-10-17 Matsushita Electric Ind Co Ltd Linearity coil

Also Published As

Publication number Publication date
EP0216076A2 (en) 1987-04-01
DE3534451A1 (en) 1987-04-02
ATE50664T1 (en) 1990-03-15
EP0216076A3 (en) 1988-01-07

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