DE2354546A1 - Adjustable ferrite pot-core - uses internal screw-thread in one core half and cylindric adjustment core-plug with fixed elastic strips - Google Patents

Adjustable ferrite pot-core - uses internal screw-thread in one core half and cylindric adjustment core-plug with fixed elastic strips

Info

Publication number
DE2354546A1
DE2354546A1 DE19732354546 DE2354546A DE2354546A1 DE 2354546 A1 DE2354546 A1 DE 2354546A1 DE 19732354546 DE19732354546 DE 19732354546 DE 2354546 A DE2354546 A DE 2354546A DE 2354546 A1 DE2354546 A1 DE 2354546A1
Authority
DE
Germany
Prior art keywords
core
pot
ferrite
adjustment
thread
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.)
Pending
Application number
DE19732354546
Other languages
German (de)
Inventor
Hans E Vogt
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 & Co KG
Original Assignee
Vogt & Co KG
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 & Co KG filed Critical Vogt & Co KG
Priority to DE19732354546 priority Critical patent/DE2354546A1/en
Publication of DE2354546A1 publication Critical patent/DE2354546A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/043—Fixed inductances of the signal type  with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

The adjustable pot-core of ferrite consists of two pot-core halves at least one of which carries an internal thread. For adjustment a cylindrical core plug is used having fixed to it one or more elastic strips (silicon rubber). The core plug may have one or more elastic strips wound helically around it. The inner thread in the centre hole of a pot core half may have been produced by injection moulding or pressing. The material of the adjustment core plugs and/or the diameter of the core plugs are chosen that the required temp. coefficient and/or adjustment range are obtained. The pot core may have the shapt of an RM or X-core.

Description

Abgleichbarer Schalenkern aus FerritAdjustable ferrite core

Es sind Schalenkerne aus Carbonyleisen bekannt,, die in einer Schalenhälfte ein Innengewinde zur Aufnahme eines dem Gewinde angepaßten Gewindekernes zum Abgleich der Induktivität aufweisen. Eine solche Lösung ist für Schalenkerne aus Ferrit nicht möglich, da bei der Herstellung der Eerritteile eine lineare, von Charge zu Charge unterschiedliche Schrumpfung auftritt, so daß keine ausreichende Genauigkeit im Hinblick auf Steigung und Durchmesser des Innengewindes gewährleistet werden kann. Da aber die notwendigen Gewindekerne eine exakte, wählbare Steigung aufweisen und ein auch nur geringer Steigungsfehler zwischen Schrauben- und Muttergewinde unweigerlich zum Klemmen führt, ist eine solche Lösung in großtechnischem Maßstab nicht denkbar.There are shell cores made of carbonyl iron known, in a Shell half have an internal thread for receiving a thread core adapted to the thread for balancing the inductance. One such solution is for pot cores made of ferrite not possible, as the production of the single parts shows a linear shrinkage that varies from batch to batch occurs, so that sufficient accuracy in terms of the pitch and diameter of the internal thread is not ensured can be. But since the necessary thread cores have an exact, selectable pitch and only a small pitch error Such a solution on an industrial scale is such a solution that inevitably leads to jamming between screw and nut threads Scale unthinkable.

Die erfindungsgemäße Ausgestaltung des Abgleichkernes erlaubt die Verwendung von Innengewinden in Ferritkernschalenhälften. Es ergibt sich daraus eine] Reihe von Vorteilen, die später beschrieben wird.The inventive design of the adjustment core allows the use of internal threads in ferrite core shell halves. This results in a number of advantages which will be discussed later is described.

Im folgenden ist der neuartige Schalenkernaufbau beschrieben.The novel shell core structure is described below.

In der Zeichnung zeigt {1) die obere Schalenkernhälfte, die .mit einem Innengewinde versehen ist, das vorzugsweise im Roh" zustand mit eingepreßt wird, da ein nachträgliches Einschleifen eines Innengewindes kleinen Durchgangs praktisch unmöglich ist· (2) zeigt die untere Schalenkernhälfte, die eine glatte Bohrung aufweist. (3) zeigt den Abgleichkern, der als Zylinderkern aus~ gebildet ist und der an seinem Umfang parallel zur Kernachse einen oder mehrere elastische Brems- und Führungsstreifen aufweist, die einerseits durch Eingriff in das Muttergewinde der Schalenkernhälfte das Schraubengewinde ersetzen und andererseits die Bremsvorrichtung gegen Verstellung darstellen.In the drawing, {1) shows the upper half of the shell core, which is provided with an internal thread, which is preferably also pressed in in the raw state, since subsequent grinding in of an internal thread with a small passage is practically impossible. (2) shows the lower shell core half, which has a smooth bore. (3) shows the adjustment core, which is designed as a cylinder core and which has one or more elastic braking and guide strips on its circumference parallel to the core axis, which on the one hand replace the screw thread by engaging the nut thread of the pot core half and on the other hand represent the braking device against adjustment.

509820/0460509820/0460

Betr.: Patentanmeldung: Abglsichbcirer Schalenkern aus FerritRe: Patent application: Comparable pot core made of ferrite

Aus der obigen Beschreibung lassen sich die Vorteile der erfindungsgemäßen Lösung leicht ablesen:The advantages of the solution according to the invention can be easily read from the above description:

1. Die Herstellung von Innengewinden in Schalenkernen ist für das Pressen und ggf. Spritzen eine übliche Technik.1. The production of internal threads in pot cores is a common technique for pressing and possibly spraying.

2. Der Nachteil des durch die Schrumpfung entstehenden Undefinierten Gewindes wird durch den zylindrischen Abgleichkern mit der elastischen Ausgleichsschicht, die sich- diesem Undefinierten Gewinde in jeder Weise anpaßt, vermieden.2. The disadvantage of the undefined thread caused by the shrinkage is due to the cylindrical thread Adjustment core with the elastic compensation layer, which - this undefined thread in every way adapts, avoided.

3. Weitere Befestigungs- und Verstellelemente für den Abgleich des Schalenkernes fallen weg.3. Other fastening and adjustment elements for the Adjustment of the pot core is no longer necessary.

4. Durch entsprechende Auswahl von Material und Durchmesser des Abgleichkernes können in weiten Grenzen sowohl der Abgleichbereich als auch der Temperaturkoeffizient bestimmt werden.4. By appropriate selection of the material and diameter of the adjustment core, both the Adjustment range as well as the temperature coefficient can be determined.

509820/0460509820/0460

Claims (6)

VOGT & CO KG, Erlau 235 A 5VOGT & CO KG, Erlau 235 A 5 Betr.: Patentanmeldung: Abgleichbarer Schalenkern aus FerritRe: Patent application: Matchable cup core made of ferrite -Patentansprüche-Patent claims { 1.)} Abgleichbarer Schalenkern aus Ferrit, dadurch gekenn-—zeichnet, daß mindestens eine Schalenkernhälfte eine mit Innengewinde versehene zentrale Bohrung aufweist. { 1.)} Adjustable cup core made of ferrite, characterized in that at least one cup core half has a central bore provided with an internal thread. 2.) Abgleichbarer Schalenkern aus Ferrit nach Anspruch 3, dadurch gekennzeichnet, daß für den Abgleich ein Zylinderkern Verwendung findet, der auf seinem Umfang parallel zur Zylinderachse einen oder mehrere aufgebrachte elastische Streifen, z.B. aus Silikonkautschuk, aufweist.2.) Matchable cup core made of ferrite according to claim 3, characterized in that a cylinder core is used for the adjustment, which is on its circumference one or more elastic strips applied parallel to the cylinder axis, e.g. made of silicone rubber, having. 3.) Abgleichbarer Schalenkern aus Ferrit, nach Anspruch \, dadurch gekennzeichnet, daß für den Abgleich ein Zylinderkern Verwendung findet, der einen oder mehrere spiralförmig am Umfang gewundene Streifen, z.B. aus Silikonkautschuk, aufweist,3.) Matchable pot core made of ferrite, according to claim \, characterized in that a cylinder core is used for the calibration, which has one or more spirally wound strips on the circumference, for example made of silicone rubber, 4.) Abgleichbarer Schalenkern aus Ferrit, nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Schalenkernhälfte mit Innengewinde im Spritz^ oder Preßyerfahren hergestellt ist,4.) Matchable cup core made of ferrite, according to claim 1, 2 or 3, characterized in that the cup core half is made with internal thread by injection ^ or press process, 5.) Abgleichbarer Schalenkern aus Ferrit, nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Material und/oder der Durchmesser des Abgleichkernes so gewählt sind, daß der gewünschte Temperaturkoeffizient und/oder Abgleichbereich erreicht werden.5.) Adjustable pot core made of ferrite, according to one or more of the preceding claims, characterized in, that the material and / or the diameter of the adjustment core are chosen so that the desired Temperature coefficient and / or calibration range can be achieved. 6.) Abgleichbarer Schalenkern aus Ferrit, nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schalenkern auch die Ausgestaltung eines RM- oder X-Kernes aufweisen kann.6.) Matchable pot core made of ferrite, according to one or more of the preceding claims, characterized in that the pot core can also have the design of an RM or X core. 509820/0460509820/0460 LeerseiteBlank page
DE19732354546 1973-10-31 1973-10-31 Adjustable ferrite pot-core - uses internal screw-thread in one core half and cylindric adjustment core-plug with fixed elastic strips Pending DE2354546A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19732354546 DE2354546A1 (en) 1973-10-31 1973-10-31 Adjustable ferrite pot-core - uses internal screw-thread in one core half and cylindric adjustment core-plug with fixed elastic strips

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732354546 DE2354546A1 (en) 1973-10-31 1973-10-31 Adjustable ferrite pot-core - uses internal screw-thread in one core half and cylindric adjustment core-plug with fixed elastic strips

Publications (1)

Publication Number Publication Date
DE2354546A1 true DE2354546A1 (en) 1975-05-15

Family

ID=5896935

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732354546 Pending DE2354546A1 (en) 1973-10-31 1973-10-31 Adjustable ferrite pot-core - uses internal screw-thread in one core half and cylindric adjustment core-plug with fixed elastic strips

Country Status (1)

Country Link
DE (1) DE2354546A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124602A1 (en) * 1982-11-05 1984-11-14 Spang & Company Adjustable air gap ferrite structures and methods of manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124602A1 (en) * 1982-11-05 1984-11-14 Spang & Company Adjustable air gap ferrite structures and methods of manufacture
EP0124602A4 (en) * 1982-11-05 1985-06-06 Spang Ind Inc Adjustable air gap ferrite structures and methods of manufacture.

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