AT220719B

AT220719B - Transfluxor with a core made of ferrite

Info

Publication number: AT220719B
Application number: AT979460A
Authority: AT
Original assignee: Siemens Ag
Priority date: 1960-03-28
Filing date: 1960-12-29
Publication date: 1962-04-10

Description

  

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  Transfluxor mit einem Kern aus Ferrit 
 EMI1.1 
 

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   Als Beispiele werden in der Zeichnung   einige Transfluxortypen   sowie die Fluss, Strom-Kurve eines erfindungsgemässen Transfluxors angegeben. 



   In Fig. 1 ist ein Transfluxor dargestellt, bei dem der Kern 1 zwei aussermittig angeordnete Löcher 5   ("Steuerloch") und 6   ("Übertragungsloch") enthält. Der Kernquerschnitt an der engsten Stelle des Steges 2 ist mindestens so gross wie die Summe der durch die engste Stelle der Verbindungsstege 3 und 4 gebilde- 
 EMI2.1 
 und 9 die Ausgangswicklung dar. 



   In Fig. 2 ist ein Transfluxor beschrieben, bei dem das Steuerloch 5 zentrisch angeordnet ist. Die Steuerwicklung 7, die Eingangs- 8 und die Ausgangswicklung 9 sind analog Fig. 1 angeordnet. 



   InFig. 3 ist ein Schnitt nach der Fig. 2 dargestellt. Der Kernquerschnitt 2 des ringkernähnlichen Speicherkörpers ist in diesem Fall grösser als der durch die Summe der Stegquerschnitte 3 und 4 gebildete Querschnitt. 



   In Fig. 4 ist eine andere Transfluxorform dargestellt, bei der der Querschnitt des Schenkels 2 des Kernes 1 ebenso gross ist wie die Summe der Querschnitte der Stege 3 und 4. Die Wicklungen sind in entsprechender Weise wie bei den Transfluxoren in den Fig. 1 und 2 angeordnet. 



   Fig. 5 zeigt die Flusskurve   cl   des Steuerkreises (gemessen in mittlerer Induktion) in Abhängigkeit von dem durch die Steuerwicklung fliessenden Strom J (gemessen in mittlerer Feldstärke) bei einem erfindungsgemässen Transfluxor. Die tatsächliche Hysteresekurve des Kernmaterials ist in Richtung des bei der Temperung angelegten Feldes sehr gut rechteckförmig. Diese Hysteresekurve ist nicht dargestellt, da die Kernform andere Verhältnisse der Messgrössen mit sich bringt. 



   Die dargestellte Flusskurve   p   = F   (J)   zeigt, dass der erfindungsgemässe Transfluxorkern Anisotropieeigenschaften besitzt. 
 EMI2.2 
 Ein Perminvarferrit mit der Zusammensetzung 
 EMI2.3 
 
<tb> 
<tb> 57 <SEP> Mol <SEP> % <SEP> Fie203,
<tb> 27,5 <SEP> Mol <SEP> %'NiO,
<tb> 12, <SEP> 5 <SEP> Mol <SEP> % <SEP> ZnO, <SEP> 
<tb> 3, <SEP> 0 <SEP> Mol <SEP> je <SEP> MnO <SEP> und
<tb> 0, <SEP> 7 <SEP> Gew. <SEP> -0/0 <SEP> CoO <SEP> 
<tb> 
 mit der Kernform nach Fig.   l   ist einer Temperung bei einer Temperatur von 4000 C und langsamer Abkühlung auf Zimmertemperatur in vier Stunden ausgesetzt. Diese Temperung erfolgt in einem Magnetfeld   mitHlO Oe, das   mittels eines durch dieses Loch 5 gesteckten, stromdurchflossenen Drahtes erzeugt wird. 



    Masse : Stärke :    
Aussendurchmesser : Da = 24 mm h = 2, 5 mm a = 0, 5 mm b= 9 mm 
 EMI2.4 
 d = 2, 5 mm
Der Transfluxor ist mit den Windungszahlen
Steuerwicklung n = 50,
Eingangswicklung n = 20,
Ausgangswicklung n = 20 bewickelt. 
 EMI2.5 




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  Transfluxor with a core made of ferrite
 EMI1.1
 

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   Some types of transfluxor and the flow, current curve of a transfluxor according to the invention are given as examples in the drawing.



   1 shows a transfluxor in which the core 1 contains two eccentrically arranged holes 5 ("control hole") and 6 ("transmission hole"). The core cross-section at the narrowest point of the web 2 is at least as large as the sum of the formed by the narrowest point of the connecting webs 3 and 4
 EMI2.1
 and 9 represents the output winding.



   In Fig. 2, a transfluxor is described in which the control hole 5 is arranged centrally. The control winding 7, the input winding 8 and the output winding 9 are arranged analogously to FIG.



   InFig. 3 shows a section according to FIG. The core cross-section 2 of the annular core-like storage body is larger in this case than the cross-section formed by the sum of the web cross-sections 3 and 4.



   In Fig. 4 another Transfluxorform is shown, in which the cross section of the leg 2 of the core 1 is just as large as the sum of the cross sections of the webs 3 and 4. The windings are in the same way as in the Transfluxors in Figs 2 arranged.



   5 shows the flow curve cl of the control circuit (measured in mean induction) as a function of the current J flowing through the control winding (measured in mean field strength) in a transfluxor according to the invention. The actual hysteresis curve of the core material is very well rectangular in the direction of the field applied during tempering. This hysteresis curve is not shown because the core shape entails different ratios of the measured variables.



   The flow curve shown p = F (J) shows that the transfluxor core according to the invention has anisotropy properties.
 EMI2.2
 A perminvar ferrite with the composition
 EMI2.3
 
<tb>
<tb> 57 <SEP> mol <SEP>% <SEP> Fie203,
<tb> 27.5 <SEP> mol <SEP>% 'NiO,
<tb> 12, <SEP> 5 <SEP> mol <SEP>% <SEP> ZnO, <SEP>
<tb> 3, <SEP> 0 <SEP> Mol <SEP> each <SEP> MnO <SEP> and
<tb> 0, <SEP> 7 <SEP> Weight <SEP> -0/0 <SEP> CoO <SEP>
<tb>
 with the core shape according to FIG. 1 is subjected to tempering at a temperature of 4000 C and slow cooling to room temperature in four hours. This tempering takes place in a magnetic field with HI Oe, which is generated by means of a wire through which current flows, which is inserted through this hole 5.



    Mass: Strength:
Outside diameter: Da = 24 mm h = 2.5 mm a = 0.5 mm b = 9 mm
 EMI2.4
 d = 2.5 mm
The Transfluxor is with the number of turns
Control winding n = 50,
Input winding n = 20,
Output winding n = 20 wound.
 EMI2.5

Claims

"Block" with PATENT CLAIMS: 1. Transfluxor with a core made of ferrite, characterized in that the core is made of annealed in a magnetic field, d. H. annealed and slowly cooled perminvar ferrite.

2. Transfluxor according to claim 1, characterized in that the core is designed in such a way that several closed magnetic circuits can form in the core.

3. Transfluxor according to claim 2, characterized in that the core has a plurality of holes which are used to accommodate electrical conductors, preferably windings, which generate magnetic fields.

4. Transfluxor according to claim 3, characterized in that at least one electrical conductor or winding, namely the "control winding", and at least two further electrical conductors or windings either jointly through at least one further hole or separated by at least two further holes through a hole are led.

5. Transfluxor according to one or more of the preceding claims, characterized in that the core is designed such that the core cross-section remains approximately constant in the control circuit.

6. Transfluxor according to claim 5, characterized in that the core is designed in the form of a toroidal core with an eccentrically offset "control hole" and at least one further hole located on the larger core cross-section.

7. A method for producing a transfluxor according to one or more of the preceding claims, characterized in that the magnetic field is applied in the direction of the later "control field" during the tempering.

8. The method according to claim 7, characterized in that to achieve a symmetrical EMI3.1 the slow cooling from the annealing temperature to room temperature takes place over a period of more than an hour, preferably 1-15 hours.

10. The method according to one or more of the preceding claims, characterized in that the magnetic field applied during the tempering by an ode! a plurality of electrical conductors passed through the various holes is excited. EMI3.2