DE2701558A1 - Ferrite ring core with internal air gap - provides high inductance at low loads, and significant inductance at high loads - Google Patents
Ferrite ring core with internal air gap - provides high inductance at low loads, and significant inductance at high loadsInfo
- Publication number
- DE2701558A1 DE2701558A1 DE19772701558 DE2701558A DE2701558A1 DE 2701558 A1 DE2701558 A1 DE 2701558A1 DE 19772701558 DE19772701558 DE 19772701558 DE 2701558 A DE2701558 A DE 2701558A DE 2701558 A1 DE2701558 A1 DE 2701558A1
- Authority
- DE
- Germany
- Prior art keywords
- inductance
- air gap
- loads
- core
- ferrite
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
-
- 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
Abstract
Description
Ringkern aus Ferrit für Drosselspulen mit nicht-Ferrite toroidal core for inductors with non-
linearem Verlauf der Permeabilität. linear course of permeability.
Es ist bekannt, Drosselspulen herzustellen und beispielsweise in Entstörgliedern zu verwenden, die einen nichtlinearen Verlauf der Induktivität im gesamtmöqlichen Aussteuerbereich aufweisen, um bei kleiner Belastung eine hohe, aber bei hoher Belastung noch immer eine brauchbare Induktivität zu erhalten.It is known to manufacture inductors and, for example, in suppressors to use a non-linear course of the inductance in total possible Have dynamic range in order to have a high level with a small load, but with a high load still get a usable inductance.
Dies wird nach dem Stand der Technik dadurch erreicht, daß man ein Material mit hoher Permeabilität, aber niedriger Sättigungsinduktion und eines mit geringerer Permeabilität und hoher Sättigungsinduktion, beispielsweise als Wickelbandringkern, kombiniert.This is achieved according to the prior art in that one Material with high permeability but low saturation induction and one with lower permeability and high saturation induction, for example as a winding tape ring core, combined.
Diese Bandringkerne sind in der Herstellung umständlich und durch das vorzugsweise hochpermeable Nickel-Eisenband sehr teuer.These band ring cores are cumbersome and difficult to manufacture the preferably highly permeable nickel-iron tape is very expensive.
Eine weitere Ausführungsform ist noch bekannt, die einen Ringkern aus Ferrit mit einem Luftspalt über den gesamten Querschnitt des Ringkernes beinhaltet. Diese Ausführung ist allerdings nicht für nichtlineare Drosseln, sondern grundsätzlich nur für lineare Drosseln geeignet.Another embodiment is also known that has a toroidal core made of ferrite with an air gap over the entire cross-section of the toroidal core. This version is not, however, for non-linear chokes, but in principle only suitable for linear chokes.
Ferritringkerne mit Luftspalt herzustellen, ist wegen der beim Sintern entstehenden Schrumpfung schwierig, so daß der Luftspalt erst in den fertigen Ringkern eingeschliffen werden kann, wenn enge Toleranzen einzuhalten sind.Making ferrite ring cores with an air gap is because of sintering resulting shrinkage difficult, so that the air gap only in the finished toroidal core can be ground in if tight tolerances are to be observed.
Der erfindungsgemäße Ringkern mit eingepreßtem Luftspalt vermeidet diese Nachteile.The toroidal core according to the invention with a pressed-in air gap avoids these disadvantages.
Darüber hinaus läßt sich durch geeignete Auswahl der Maße des Luftspalts und der stehenbleibenden Stege eine Anpassung der Sättigungskurve erreichen. Die Wirkungsweise des Ringkerns aus Ferrit gemäß der Erfindung ist wie folgt zu erklären: Es ist bekannt, daß Ferrit im geschlossenen magnetischen Kreis bei definierten magnetischen Feldstärken in die Sättigung geht, d.h., die Permeabilität geht gegen "1". Ist eine Scherung vorhanden, sind wegen der Entmagnetisierungswirkung dieser Scherung höhere Feldstärken einzusetzen, um das Ferrit in die Sättigung zu drängen.In addition, by suitable selection of the dimensions of the air gap and the remaining webs achieve an adaptation of the saturation curve. the Operation of the ferrite toroidal core according to the invention can be explained as follows: It is known that ferrite in a closed magnetic circuit at defined magnetic Field strengths go into saturation, i.e. the permeability goes towards "1". Is a Shear present are higher because of the demagnetizing effect of that shear Use field strengths to force the ferrite into saturation.
Betr.: Patentanmeldung: Ringkern aus Ferrit für Drossel spulen mit nichtlinearem.....Re: patent application: toroidal core made of ferrite for choke coils with non-linear .....
Bei einer kleinen Belastung (niedrige magnetische Feldstärke) sind nur die kleinen Stege des erfindungsgemäßen Ringkerns wirksam (geschlossener magnetischer Kreis), so daß die Permeabilität (Induktivität) der Drossel hoch liegt.With a small load (low magnetic field strength) are only the small webs of the toroidal core according to the invention are effective (closed magnetic Circle), so that the permeability (inductance) of the choke is high.
Bei einer bestimmten Feldstärke gehen die Stege in die Sättigung und werden also magnetisch unwirksam, so daß die gesamte Luftspaltfläche als Scherung wirksam ist, während der restliche Kern sich noch nicht in der Sättigung befindet. Die Drossel weist eine geringere, aber konstante brauchbare Permeabilität (Induktivität) auf.At a certain field strength, the bars go into saturation and are therefore magnetically ineffective, so that the entire air gap area as shear is effective while the remainder of the core is not yet in saturation. The choke has a lower, but constant usable permeability (inductance) on.
Die Abbildung 1 zeigt schematisch einen erfindungsgemäßen Ringkern (1) mit dem eingepreßten Luftspalt (2) und den stehengebliebenen Stegen (3).Figure 1 shows schematically a toroidal core according to the invention (1) with the pressed-in air gap (2) and the remaining webs (3).
Abbildung 2 zeigt die Kurve der ebenfalls schematisch resultierenden Permeabilität p über die magnetische Belastung 1i.Figure 2 shows the curve of the also schematically resulting Permeability p over the magnetic load 1i.
Im Bereich I ist das Ferrit allein wirksam, im Bereich II sind die Stege bereits im gesättigten Zustand, so daß die Scherung des Luftspalts (2) wirksam wird.In area I the ferrite alone is effective, in area II they are Bars already in the saturated state, so that the shear of the air gap (2) is effective will.
Erst im Bereich III geht auch der Ferrit des restlichen Ringkernes in die magnetische Sättigung.Only in area III does the ferrite of the remaining toroidal core work into magnetic saturation.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772701558 DE2701558A1 (en) | 1977-01-15 | 1977-01-15 | Ferrite ring core with internal air gap - provides high inductance at low loads, and significant inductance at high loads |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772701558 DE2701558A1 (en) | 1977-01-15 | 1977-01-15 | Ferrite ring core with internal air gap - provides high inductance at low loads, and significant inductance at high loads |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2701558A1 true DE2701558A1 (en) | 1978-07-20 |
DE2701558C2 DE2701558C2 (en) | 1989-07-06 |
Family
ID=5998771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19772701558 Granted DE2701558A1 (en) | 1977-01-15 | 1977-01-15 | Ferrite ring core with internal air gap - provides high inductance at low loads, and significant inductance at high loads |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2701558A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3332747A1 (en) * | 1983-09-10 | 1985-03-28 | Vogt Gmbh & Co Kg, 8391 Erlau | Magnetic core for a non-linear ferrite inductor |
DE3608519A1 (en) * | 1986-03-14 | 1987-09-17 | Philips Patentverwaltung | Coil core |
DE3901792A1 (en) * | 1989-01-21 | 1990-08-09 | Philips Patentverwaltung | Toroidal (ring) core made of ferrite or iron powder |
EP0577334A2 (en) * | 1992-07-02 | 1994-01-05 | AT&T Corp. | Partial gap magnetic core apparatus |
US7642098B2 (en) | 2005-04-06 | 2010-01-05 | Forschungszentrum Karlsruhe Gmbh | Ferromagnetic or ferrimagnetic layer, method for the production thereof, and use thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10234979A1 (en) * | 2002-07-31 | 2004-02-12 | Epcos Ag | Inductance core has a ring shaped with a profiled radial slot produced in sintered material to produce a non linear characteristic |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1944888C3 (en) * | 1969-09-04 | 1974-05-09 | Siemens Ag | Magnetic core composed of sheet metal |
-
1977
- 1977-01-15 DE DE19772701558 patent/DE2701558A1/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1944888C3 (en) * | 1969-09-04 | 1974-05-09 | Siemens Ag | Magnetic core composed of sheet metal |
Non-Patent Citations (3)
Title |
---|
Buch "Weichmagnetische Werkstoffe", bearb. von R. Boll, Hrsg. Vacuumschmelze Hanau, Verlag Siemens AG (Abt. Verlag) Berlin, München, 3. Aufl., 1977, S. 121-125, S. 146-147 * |
Firmenschrift "Nichtlineare Sieb- und Speicherdrosseln" der Firma Vacuumschmelze GmbH, Hanau, Bezeichnung Z019, Ausgabe 06/76 * |
Firmenschrift "Verschiedene Kernformen" der Firma Vogt u. Co mbH, Erlau, Ausgabe Sept. 1959 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3332747A1 (en) * | 1983-09-10 | 1985-03-28 | Vogt Gmbh & Co Kg, 8391 Erlau | Magnetic core for a non-linear ferrite inductor |
DE3608519A1 (en) * | 1986-03-14 | 1987-09-17 | Philips Patentverwaltung | Coil core |
DE3901792A1 (en) * | 1989-01-21 | 1990-08-09 | Philips Patentverwaltung | Toroidal (ring) core made of ferrite or iron powder |
DE3901792C2 (en) * | 1989-01-21 | 2002-06-20 | Lucent Technologies Inc | Toroidal core made of ferrite or iron powder material |
EP0577334A2 (en) * | 1992-07-02 | 1994-01-05 | AT&T Corp. | Partial gap magnetic core apparatus |
EP0577334A3 (en) * | 1992-07-02 | 1994-02-23 | American Telephone & Telegraph | |
US7642098B2 (en) | 2005-04-06 | 2010-01-05 | Forschungszentrum Karlsruhe Gmbh | Ferromagnetic or ferrimagnetic layer, method for the production thereof, and use thereof |
Also Published As
Publication number | Publication date |
---|---|
DE2701558C2 (en) | 1989-07-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8127 | New person/name/address of the applicant |
Owner name: VOGT ELECTRONIC AG, 8391 ERLAU, DE |
|
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8331 | Complete revocation |