DE971534C - Wire ring magnet, especially for eddy current measuring devices - Google Patents

Wire ring magnet, especially for eddy current measuring devices

Info

Publication number
DE971534C
DE971534C DEV4160A DEV0004160A DE971534C DE 971534 C DE971534 C DE 971534C DE V4160 A DEV4160 A DE V4160A DE V0004160 A DEV0004160 A DE V0004160A DE 971534 C DE971534 C DE 971534C
Authority
DE
Germany
Prior art keywords
wire ring
eddy current
ring magnet
wire
measuring devices
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
Application number
DEV4160A
Other languages
German (de)
Inventor
Kurt Dipl-Ing Brinkmann
Werner Dipl-Ing Dr Krumnow
Helmut Preusler
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Priority to DEV4160A priority Critical patent/DE971534C/en
Application granted granted Critical
Publication of DE971534C publication Critical patent/DE971534C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Description

Drahtringmagnet, insbesondere für Wirbelstrommeßgeräte Es sind Ringmagnete bekannt, die aus einem hochmagnetisierbaren Stoff in Drahtform bestehen. Derartige Drahtringmagnete werden vorzugsweise in Nuten eingelegt, die in den. Rand scheibenförmiger Träger eingelassen sind. Werden derartige Magnete in Wirbelstrommeßgeräten verwendet, so zeigt sich bekanntlich eine Abhängigkeit des Drehmomentes der Wirbelstromglocke von der Temperatur in dem Sinne, daß bei zunehmender Temperatur das auf die Wirbelstromglocke ausgeübte Drehmoment abnimmt, weil der spezifische Ohmsche Widerstand der Wirbelstromglocke zunimmt. Es ist bekannt, zur Kompensation dieses Temperatureffekts einen magnetischen Nebenschluß zu dem Magneten anzubringen, der aus einem Stoff besteht, dessen magnetische Leitfähigkeit mit steigender Temperatur abnimmt, damit bei steigender Temperatur weniger magnetische Kraftlinien durch den Nebenschluß und mehr Kraftlinien durch die Wirbelstromglocke gehen.Wire ring magnet, especially for eddy current measuring devices. They are ring magnets known, which consist of a highly magnetizable material in wire form. Such Wire ring magnets are preferably inserted into grooves that are in the. Edge more disc-shaped Carriers are let in. If such magnets are used in eddy current meters, as is known, there is a dependency of the torque of the eddy current bell on the temperature in the sense that with increasing temperature this affects the eddy current bell The torque exerted decreases because of the resistivity of the eddy current bell increases. It is known to use a magnetic to compensate for this temperature effect To attach shunt to the magnet, which consists of a substance whose magnetic Conductivity decreases with increasing temperature, thus with increasing temperature fewer magnetic lines of force through the shunt and more lines of force through go the eddy current bell.

Nach der Erfindung besteht bei Drah,tringmagneten der magnetische Nebenschluß aus einem ringförmig gebogenen Draht aus einem Stoff mit negativem Temperaturkoeffizienten .der magnetischen Leitfähigkeit, der konzentrisch in den Drahtringmagneten eingelegt ist. Die in den Tragkörper eingearbeitete Nut wird dabei so gestaltet, daß sie außer dem Drahtringmagneten auch dem Temperaturkompensationsring Platz bietet. Der den Kompensationsring umschließende Drahtringmagnet hält den .ersteren vermöge seiner elastischen Spannung fest.According to the invention, wire, ring magnets are magnetic Shunt made of a wire bent in the shape of a ring made of a material with a negative temperature coefficient .the magnetic conductivity, which is placed concentrically in the wire ring magnet is. The groove worked into the support body is designed so that it except the wire ring magnet also offers space for the temperature compensation ring. The den Compensation ring enclosing wire ring magnet holds the first by virtue of its elastic tension.

Claims (1)

PATENTANSPRÜCHE: ---i. Drahtringmagnet, insbesondere fürWirbelstrommeßgeräte, miteinemmagnetischen,Nebensch,luß zur Temperaturkompensation, der aus einem Stoff mit negativem Temperaturkoeffizienten der magnetischen Leitfähigkeit besteht, dadurch gekennzeichnet, daß der Nebenschluß aus einem Drahtring besteht, der konzentrisch innerhalb des Drahtringmagneten angeordnet ist. a. Drahtringmagnet nach Anspruch i, dadurch gekennzeichnet, daß der Nebenschlußring in derselben Nut des scheibenförmigen Tragkörpers des Drahtringmagneten liegt wie der Drabtmagnetring selbst. PATENT CLAIMS: --- i. Wire ring magnet, in particular for eddy current measuring devices, with a magnetic auxiliary circuit for temperature compensation, which consists of a substance with a negative temperature coefficient of magnetic conductivity, characterized in that the auxiliary circuit consists of a wire ring which is arranged concentrically within the wire ring magnet. a. Wire ring magnet according to Claim i, characterized in that the shunt ring lies in the same groove in the disk-shaped support body of the wire ring magnet as the wire magnet ring itself.
DEV4160A 1951-12-25 1951-12-25 Wire ring magnet, especially for eddy current measuring devices Expired DE971534C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV4160A DE971534C (en) 1951-12-25 1951-12-25 Wire ring magnet, especially for eddy current measuring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV4160A DE971534C (en) 1951-12-25 1951-12-25 Wire ring magnet, especially for eddy current measuring devices

Publications (1)

Publication Number Publication Date
DE971534C true DE971534C (en) 1959-02-12

Family

ID=7570803

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV4160A Expired DE971534C (en) 1951-12-25 1951-12-25 Wire ring magnet, especially for eddy current measuring devices

Country Status (1)

Country Link
DE (1) DE971534C (en)

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