DE454081C - Method for increasing the permeability of subdivided magnetic cores, in particular magnetic cores made of powder, cross wire cores and the like. like - Google Patents
Method for increasing the permeability of subdivided magnetic cores, in particular magnetic cores made of powder, cross wire cores and the like. likeInfo
- Publication number
- DE454081C DE454081C DEA45568D DEA0045568D DE454081C DE 454081 C DE454081 C DE 454081C DE A45568 D DEA45568 D DE A45568D DE A0045568 D DEA0045568 D DE A0045568D DE 454081 C DE454081 C DE 454081C
- Authority
- DE
- Germany
- Prior art keywords
- magnetic
- cores
- composition
- powder
- magnetic cores
- 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
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
- H01F1/14—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 metals or alloys
- H01F1/16—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 metals or alloys in the form of sheets
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
Description
Verfahren zur Erhöhung der Permeabilität von unterteilten Magnetkernen, insbesondere Magnetkernen aus Pulver, Querdrahtkernen u. dgl. Aus Einzelelementen zusammengesetzte Magnetkerne finden beispielsweise in der Fernsprechtechnik, besonders für Pupinspulen, eine ausgedehnte Verwendung. Derartige, meist kreisringförmige Kerne werden in der Regel durch Aufwickeln von. feinem Draht zu- Ringen (Drahtkernen) oder durch Pressen von Eisenpulver (Massekernen) hergestellt, oder sie werden aus Drahtstückchen zusammengesetzt, die gegen die Ringebene geneigt sind (Querdrahtkerne). Die Unterteilung des magnetischen Materials dient zur Herabsetzung der Wirbelstromverluste und in manchen Fällen (Massekern und Querdrahtkern) zur Erhöhung der magnetischen Stabilität. Bei aus Draht gewickelten Kernen ist eine besondere Isolierung der Einzelelemente gegeneinander meist nicht erforderlich. Bei Massekernen und Querdrahtkernen bedarf es jedoch einer solchen Isolierung. Bekanntlich füllen nun aber bei allen diesen Kerntypen die magnetischen und die isolierenden Elemente den gegebenen Raum nach der Zusammensetzung des Kerns nicht voll aus. Es bleiben daher unmagnetische Zwischenräume übrig, die für die Permeabilität der Kerne dann besonders schädlich sind, wenn sie quer zur magnetischen Feldrichtung liegen; sie können die wirksame Permeabilität außerordentlich herabsetzen. Gegenstand der Erfindung ist ein Verfahren zur Erhöhung der Permeabilität derartiger Kerne, das darin besteht, daß die schädt lichen, unmagnetischen Hohlräume nach der Zusammensetzung des Kerns aus seinen Einzelelementen ganz oder teilweise mit magnetischem Material ausgefüllt werden. Eine Ausführungsform des erfindungsgemäßen Verfahrens besteht darin, den gewickelten, gepreßten oder sonstwie zusammengesetzten Kern nach seiner Herstellung in einer magnetischen Lösung oder Schmelze zu tränken. Eine solche Tränkung ist auch beim Massekern möglich, da dieser bei geeigneter Herstellung auch nach seiner Pressung noch von einem kapillaren Netz von Hohlräumen durchzogen wird. Als Tränkmittel eignen sich z. B. kolloidale Lösungen von metallischem Eisen oder metallischen Eisenlegierungen in leicht verdampfenden Flüssigkeiten. Es empfiehlt sich dabei, wiederholt zu tränken und zu trocknen. Man kann den Körper gegebenenfalls auch in Schmelzen von Heuslerschen Legierungen tränken oder solche Legierungen in Form von feinem Pulver dem Material vor seiner Zusammensetzung beigeben und dieses Pulver nach der Zusammensetzung durch Erwärmen zum Zusammenfließen bringen, wodurch seine magnetische Leitfähigkeit wesentlich erhöht wird.Process for increasing the permeability of subdivided magnetic cores, in particular magnetic cores made of powder, cross wire cores and the like made of individual elements Composite magnetic cores are used, for example, in telephony, especially for pupin coils, an extensive use. Such, mostly circular Cores are usually made by winding. to ring fine wire (wire cores) or by pressing iron powder (mass cores), or they are made from Pieces of wire put together that are inclined against the plane of the ring (cross wire cores). The division of the magnetic material serves to reduce eddy current losses and in some cases (ground core and cross wire core) to increase the magnetic Stability. In the case of cores wound from wire, there is a special insulation of the individual elements against each other mostly not necessary. For earth cores and cross wire cores required however, there is such isolation. It is well known, however, that they fill up with all of these Core types the magnetic and the insulating elements according to the given space the composition of the core does not fully reflect. There are therefore non-magnetic gaps left over, which are particularly detrimental to the permeability of the cores when they lie transversely to the direction of the magnetic field; they can increase the effective permeability greatly diminish. The invention relates to a method for increasing the permeability of such cores, which consists in the fact that the harmful, non-magnetic ones Cavities according to the composition of the core from its individual elements entirely or partially filled with magnetic material. One embodiment of the The method according to the invention consists in the wound, pressed or otherwise composite core after its manufacture in a magnetic solution or Soak melt. Such an impregnation is also possible with the mass core, since this with suitable manufacture, even after it has been pressed, a capillary network is traversed by cavities. Suitable impregnating agents are, for. B. colloidal solutions of metallic iron or metallic iron alloys in easily evaporating Liquids. It is advisable to soak and dry repeatedly. Man can, if necessary, soak the body in melts of Heusler's alloys or such alloys in the form of fine powder the material prior to its composition add and this powder after the composition by heating to confluence bring, whereby its magnetic conductivity is significantly increased.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA45568D DE454081C (en) | 1925-07-26 | 1925-07-26 | Method for increasing the permeability of subdivided magnetic cores, in particular magnetic cores made of powder, cross wire cores and the like. like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA45568D DE454081C (en) | 1925-07-26 | 1925-07-26 | Method for increasing the permeability of subdivided magnetic cores, in particular magnetic cores made of powder, cross wire cores and the like. like |
Publications (1)
Publication Number | Publication Date |
---|---|
DE454081C true DE454081C (en) | 1927-12-27 |
Family
ID=6934787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA45568D Expired DE454081C (en) | 1925-07-26 | 1925-07-26 | Method for increasing the permeability of subdivided magnetic cores, in particular magnetic cores made of powder, cross wire cores and the like. like |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE454081C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE952653C (en) * | 1953-07-17 | 1956-11-22 | Eisen & Stahlind Ag | Rotor body for electrical machines, which has a central bore filled with a ferromagnetic core |
DE968915C (en) * | 1952-03-29 | 1958-04-10 | Siemens Ag | Closed ferromagnetic core with butt joints |
-
1925
- 1925-07-26 DE DEA45568D patent/DE454081C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968915C (en) * | 1952-03-29 | 1958-04-10 | Siemens Ag | Closed ferromagnetic core with butt joints |
DE952653C (en) * | 1953-07-17 | 1956-11-22 | Eisen & Stahlind Ag | Rotor body for electrical machines, which has a central bore filled with a ferromagnetic core |
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