DE10304794A1 - Electrically conducting, magnetic powder for electrical part for transmitting electrical signal/voltage/current between contacts contains or consists of electrically conducting and magnetic particles - Google Patents
Electrically conducting, magnetic powder for electrical part for transmitting electrical signal/voltage/current between contacts contains or consists of electrically conducting and magnetic particles Download PDFInfo
- Publication number
- DE10304794A1 DE10304794A1 DE2003104794 DE10304794A DE10304794A1 DE 10304794 A1 DE10304794 A1 DE 10304794A1 DE 2003104794 DE2003104794 DE 2003104794 DE 10304794 A DE10304794 A DE 10304794A DE 10304794 A1 DE10304794 A1 DE 10304794A1
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- Prior art keywords
- magnetic
- liquid
- electrically conductive
- component
- contacts
- Prior art date
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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
- H01F1/20—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 particles, e.g. powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
- H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
- H01C17/06506—Precursor compositions therefor, e.g. pastes, inks, glass frits
- H01C17/06513—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
- H01C17/06526—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component composed of metals
-
- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/04—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 hard-magnetic materials metals or alloys
- H01F1/06—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 hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/061—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 hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer
-
- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/10—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/112—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles with a skin
-
- 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
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H29/00—Switches having at least one liquid contact
- H01H29/02—Details
- H01H29/04—Contacts; Containers for liquid contacts
- H01H29/06—Liquid contacts characterised by the material thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H2036/0086—Movable or fixed contacts formed by permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Adjustable Resistors (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine elektrisch leitende, magnetische Flüssigkeit.The present invention relates to an electrically conductive, magnetic liquid.
In einer Vielzahl von elektrischen Anwendungen müssen zwischen mehreren elektrischen Kontakten elektrisch leitende Verbindungen hergestellt werden, beispielsweise um ein elektrisches Steuersignal bzw. eine elektrische Spannung bzw. einen elektrischen Strom zwischen den miteinander verbundenen Kontakten zu übertragen. Betrachtet werden hierbei vor allem dynamische Verbindungen, also Verbindungen, die in Abhängigkeit vorbestimmter Bedingungen geschlossen und geöffnet oder verändert werden.In a variety of electrical Applications must electrically conductive connections between several electrical contacts are produced, for example around an electrical control signal or an electrical voltage or an electrical current between to transfer the connected contacts. Are considered here above all dynamic connections, i.e. connections that are dependent predetermined conditions are closed and opened or changed.
Beispielsweise werden bei einem Schalter darin angeordnete Kontakte in Abhängigkeit einer Betätigung des Schalters miteinander verbunden oder voneinander getrennt. Derartige Schalter können beispielsweise als Endschalter ausgestaltet sein, die unterschiedliche Relativlagen zwischen den Kontakten und einem Verbindungselement zum Verbinden der Kontakte erkennen. Bei mechanischen Lösungen wird das Verbindungselement körperlich mit den Kontakten kontaktiert, um die jewei lige Verbindung herzustellen. Alternativ sind elektronisch arbeitende Lösungen möglich, bei denen der Schalter beispielsweise induktiv, kapazitiv, optisch, mit Ultraschall oder unter Verwendung des Halleffekts betätigt wird, um das jeweils gewünschte Schaltsignal zu generieren.For example, in a switch arranged contacts depending an actuation of the switch connected or separated from each other. such Switches can For example, be configured as a limit switch, the different Relative positions between the contacts and a connecting element Detect to connect the contacts. With mechanical solutions the connecting element physically contacted with the contacts to establish the respective connection. Alternatively, electronically working solutions are possible in which the switch for example inductive, capacitive, optical, with ultrasound or is actuated using the Hall effect to the desired switching signal to generate.
Andere Anwendungen sind z.B. Potentiometer, bei denen eine Kollektorbahn entlang einer Widerstandsbahn angeordnet ist und bei denen ein Verbindungselement den Kollektor mit dem Widerstand verbindet. Das Verbindungselement ist dabei entlang der Bahnen verstellbar, wobei das Ausgangssignal des Potentiometers von der Relativlage des Verbindungselements entlang der Bahnen abhängt. Bei einer mechanischen Lösung ist das Verbindungselement üblicherweise als Schleifer ausgestaltet. Da derartige Lösungen verschleißanfällig sind, werden auch hier bereits elektrische bzw. elektronische Lösungen angewandt, die berührungslos und somit verschleißfrei arbeiten. Potentiometer werden beispielsweise für Weg- und Winkelsensoren benötigt.Other applications are e.g. potentiometer where a collector track is arranged along a resistance track and in which a connecting element connects the collector to the resistor. The connecting element is adjustable along the tracks, where the output signal of the potentiometer from the relative position of the connecting element depends on the tracks. With a mechanical solution is the connecting element usually designed as a grinder. Since such solutions are prone to wear, electrical or electronic solutions are already used here, the contactless and therefore wear-free work. Potentiometers are required for displacement and angle sensors, for example.
Dynamische Verbindungen, die mit körperlicher oder schleifender Kontaktierung des Verbindungselements mit den jeweiligen Kontakten arbeiten, können zwar relativ preiswert hergestellt werden, sind jedoch verschleißanfällig und im Hinblick auf eine lange Lebensdauer und Zuverlässigkeit des jeweiligen Bauteils nachteilig. Im Unterschied dazu können elektronische Systeme berührungslos arbeiten, so dass quasi kein Verschleiß auftritt. Elektronische Systeme sind allerdings vergleichsweise teuer. Desweiteren kann auch bei elek tronischen Systemen eine hohe Zuverlässigkeit nur begrenzt gewährleistet werden.Dynamic connections with physical or sliding contact of the connecting element with the respective contacts can work Although they are relatively inexpensive to manufacture, they are prone to wear and tear in terms of long life and reliability of the respective component disadvantageous. In contrast, electronic Non-contact systems work so that there is virtually no wear. Electronic systems are comparatively expensive. Furthermore, can also electronic systems, high reliability can only be guaranteed to a limited extent.
Die vorliegende Erfindung beschäftigt sich mit dem Problem, für das dynamische Verbinden von wenigstens zwei elektrischen Kontakten einen Weg aufzuzeigen, der preiswert realisierbar ist und bei einer hohen Zuverlässigkeit eine lange Lebenszeit eines damit arbeitenden Systems ermöglicht.The present invention is concerned with the problem for the dynamic connection of at least two electrical contacts to show a way that can be realized inexpensively and with one high reliability enables a long service life of a system working with it.
Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention things the independent Expectations solved. Advantageous embodiments are subject to the dependent Expectations.
Die Erfindung beruht auf dem allgemeinen Gedanken, ein elektrisch leitendes und magnetisches oder ferro-magnetisches Fluid bereitzustellen. Ein derartiges CMF (Conductive Magnet Fluid) vereint in sich zwei Eigenschaften, nämlich die Beeinflussbarkeit durch magnetische Kräfte einerseits und die elektrische Leitfähigkeit andererseits, in einer Flüssigkeit. Hierdurch ist es möglich, das CMF mittels magnetischer Kräfte, also insbesondere berührungslos zu manipulieren, beispielsweise um das CMF relativ zu elektrischen Kontakten zu bewegen. Desweiteren können mit dem CMF zwei oder mehr elektrische Kontakte miteinander verbunden werden, da das CMF erfindungsgemäß hinreichend elektrisch leitfähig ist. Ebenso ist es möglich, das CMF entlang von Kontakten, beispielsweise in einem Potentiometer, zu positionieren. Zwar kommt es auch hier zu einem körperlichen Kontakt zwischen dem CMF und den jeweiligen Kontakten, jedoch können Rei bungsbeiwerte zwischen einer Flüssigkeit und einem Festkörper extrem klein sein. Dementsprechend können die elektrischen Kontakte mit dem CMF quasi verschleißfrei kontaktiert werden.The invention is based on the general idea an electrically conductive and magnetic or ferro-magnetic Provide fluid. Such a CMF (Conductive Magnet Fluid) combines two properties, namely the ability to be influenced through magnetic forces on the one hand and the electrical conductivity on the other hand, in a liquid. This makes it possible the CMF by means of magnetic forces, in particular without contact to manipulate, for example to make the CMF relative to electrical Contacts. Furthermore, with the CMF two or more electrical contacts are connected together because the CMF sufficient according to the invention electrically conductive is. It is also possible the CMF along contacts, for example in a potentiometer, to position. There is also a physical one here Contact between the CMF and the respective contacts, however, friction coefficients can between a liquid and a solid be extremely small. Accordingly, the electrical contacts virtually wear-free with the CMF be contacted.
Mit dem CMF kann in einem elektrischen Bauteil ein Verbindungselement bereit gestellt werden, das mittels magnetischer Kräfte berührungslos relativ zu den jeweiligen Kontakten verstellt werden kann. Hierdurch können verschleißfrei arbeitende Systeme realisiert werden, die zuverlässig arbeiten und eine hohe Lebensdauer besitzen.The CMF can be used in an electrical component a connecting element can be provided by means of magnetic personnel non-contact relative can be adjusted to the respective contacts. This allows systems to work without wear be realized that reliably work and have a long service life.
Dabei ist es insbesondere möglich, das CMF und die jeweiligen Kontakte in einem hermetisch abgeschlossenen Gehäuse unterzubringen und das Gehäuse so auszugestalten, dass die magnetischen Kräfte zum Verstellen des CMF von außen durch eine Wand des Gehäuses hindurch auf das CMF einwirken können. Hierdurch eröffnen sich für die jeweiligen Bauteile neuartige Anwendungsgebiete.It is particularly possible that CMF and the respective contacts in a hermetically sealed casing accommodate and the housing To be designed so that the magnetic forces for adjusting the CMF from the outside through a wall of the housing can act on the CMF. Hereby open up for the respective components have new areas of application.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages the invention emerge from the subclaims, from the drawings and from the associated Description of the figures using the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the above not only mentioned and the features to be explained below in the specified combination, but also in others Combinations or alone can be used without the frame to leave the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder funktional gleiche oder ähnliche Bauteile beziehen.Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description tert, the same reference numerals refer to the same or functionally identical or similar components.
Es zeigen, jeweils schematisch,Each shows schematically
Entsprechend
Bei einer besonderen Ausführungsform
können
die Partikel
Bei einer anderen Ausführungsform
können die
Partikel
Die elektrische Beschichtung
Auch ist es möglich, die magnetische und elektrisch
leitende Flüssigkeit
dadurch bereitzustellen, dass magnetische Partikel
Die Trägerflüssigkeit
Zur Verdeutlichung ist in
Alternativ ist auch eine Ausführungsform möglich, bei
welcher die vorzugsweise magnetisch und elektrisch neutrale Trägerflüssigkeit
Die erfindungsgemäße elektrisch leitende, magnetische
Flüssigkeit
Das CMF-Volumen
In den
Entsprechend
Diese Positionierung des CMF-Volumens
Bei einer Relativverstellung des
Aktuators
Sofern das Potentiometer
Wie aus
Die erfindungsgemäße Anwendung der elektrisch
leitenden, magnetischen Flüssigkeit
Die Widerstandsbahn
Bei der Ausführungsform gemäß
Während
bei der Ausführungsform
gemäß
Bei den hier gezeigten Ausführungsformen besitzt
die Betätigungseinrichtung
Weitere Bauteile, die elektrische
Kontakte enthalten, die mit Hilfe der erfindungsgemäßen elektrisch
leitenden, magnetischen Flüssigkeit
Claims (21)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003104794 DE10304794B4 (en) | 2003-02-05 | 2003-02-05 | Use of an electrically conductive, magnetic fluid |
EP04001172A EP1445778A3 (en) | 2003-02-05 | 2004-01-21 | Electrically conductive magnetic powder |
US10/770,651 US20040155228A1 (en) | 2003-02-05 | 2004-02-03 | Electrically conducting, magnetic powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003104794 DE10304794B4 (en) | 2003-02-05 | 2003-02-05 | Use of an electrically conductive, magnetic fluid |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10304794A1 true DE10304794A1 (en) | 2004-09-09 |
DE10304794B4 DE10304794B4 (en) | 2007-06-06 |
Family
ID=32841606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003104794 Expired - Lifetime DE10304794B4 (en) | 2003-02-05 | 2003-02-05 | Use of an electrically conductive, magnetic fluid |
Country Status (1)
Country | Link |
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DE (1) | DE10304794B4 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10323765B4 (en) * | 2003-05-22 | 2012-10-18 | Frank Dietrich | Electrical component and use of an electrically conductive, magnetic powder |
DE102011089024A1 (en) * | 2011-12-19 | 2013-06-20 | Zf Friedrichshafen Ag | Assembly for locking system of motor car door e.g. driver side door, has switching device comprising contactless magnetic displaceable switching medium for selectively bridging contact regions of different lead frame conductors |
US10082413B2 (en) | 2015-05-26 | 2018-09-25 | M Micro Technologies, Inc. | Magnetic actuated contact using a coil system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202014103242U1 (en) | 2014-07-15 | 2014-10-02 | Hoffmann + Krippner Gmbh | magnetic sensor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4732706A (en) * | 1985-03-20 | 1988-03-22 | Ferrofluidics Corporation | Method of preparing low viscosity, electrically conductive ferrofluid composition |
JPH07226316A (en) * | 1994-02-14 | 1995-08-22 | Toyohisa Fujita | Magnetic electrorheology fluid and its manufacture |
US5769996A (en) * | 1994-01-27 | 1998-06-23 | Loctite (Ireland) Limited | Compositions and methods for providing anisotropic conductive pathways and bonds between two sets of conductors |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1159071B (en) * | 1962-01-09 | 1963-12-12 | Siemens Ag | Magnetically operated mercury contact |
US3289126A (en) * | 1963-01-10 | 1966-11-29 | Fifth Dimension Inc | Mercury switch employing magnetizable fluid |
-
2003
- 2003-02-05 DE DE2003104794 patent/DE10304794B4/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4732706A (en) * | 1985-03-20 | 1988-03-22 | Ferrofluidics Corporation | Method of preparing low viscosity, electrically conductive ferrofluid composition |
US5769996A (en) * | 1994-01-27 | 1998-06-23 | Loctite (Ireland) Limited | Compositions and methods for providing anisotropic conductive pathways and bonds between two sets of conductors |
JPH07226316A (en) * | 1994-02-14 | 1995-08-22 | Toyohisa Fujita | Magnetic electrorheology fluid and its manufacture |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10323765B4 (en) * | 2003-05-22 | 2012-10-18 | Frank Dietrich | Electrical component and use of an electrically conductive, magnetic powder |
DE102011089024A1 (en) * | 2011-12-19 | 2013-06-20 | Zf Friedrichshafen Ag | Assembly for locking system of motor car door e.g. driver side door, has switching device comprising contactless magnetic displaceable switching medium for selectively bridging contact regions of different lead frame conductors |
US10082413B2 (en) | 2015-05-26 | 2018-09-25 | M Micro Technologies, Inc. | Magnetic actuated contact using a coil system |
Also Published As
Publication number | Publication date |
---|---|
DE10304794B4 (en) | 2007-06-06 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: METALLUX AG, 71404 KORB, DE |
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8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: DIETRICH, FRANK, 73760 OSTFILDERN, DE |
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R082 | Change of representative | ||
R081 | Change of applicant/patentee |
Owner name: WIKA ALEXANDER WIEGAND SE & CO. KG, DE Free format text: FORMER OWNER: DIETRICH, FRANK, 73760 OSTFILDERN, DE Effective date: 20131114 |
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R071 | Expiry of right |