AT113607B - Rotary magnet for adjustment angles below 90 °. - Google Patents

Rotary magnet for adjustment angles below 90 °.

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Publication number
AT113607B
AT113607B AT113607DA AT113607B AT 113607 B AT113607 B AT 113607B AT 113607D A AT113607D A AT 113607DA AT 113607 B AT113607 B AT 113607B
Authority
AT
Austria
Prior art keywords
rotary magnet
magnet according
double
coil
armature
Prior art date
Application number
Other languages
German (de)
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of AT113607B publication Critical patent/AT113607B/en

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Description

  

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  Drehmagnet für   VerstellwinItel unterhalb 90 .   
 EMI1.1 
 

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 EMI2.1 
 Massgabe des Widerstandes oder - bei Wechselstrom - der Impedanz des betrachteten Leitungsstücke statt, eine Messung, die beim Selektivschutz von Leitungsnetzen eine Rolle spielt. Die beiden Anker   ml   und   m2   sind gegen die    Mittellagesymmetrisch"Keraetzt so   dass sich bei gleicher Erregung der beiden Magnetspulen   a1   und a2 ihre Drehmomente aufheben. Man lässt zweckmässig die beiden Anker nur auf dem mittleren, nahezu geradlinigen Teil der Drehmomentkurve arbeiten, so dass das Drehsystem in diesem Ausschlagbereich praktisch astatischen Charakter besitzt.

   Infolgedessen wird der Drehmagnet zu einem höchst empfindlichen Ansprechorgan, das nach der einen oder andern Seite   ausschlägt,   je nachdem eine bestimmte Grenzimpedanz über- oder unterschritten wird. 



   PATENT-ANSPRUCHE :   1.   Drehmagnet für Verstellwinkel unterhalb 900, dadurch gekennzeichnet, dass der Kern der festen Magnetspule aus vier segmentförmigen Polschuhen, die zu je zweien symmetrisch an den Enden des Spulenhohlraumes angeordnet sind, und aus dem mit zwei Eisensegmenten versehenen Drehanker gebildet ist, die den axialen Luftabstand zwischen je zwei Polschuhen magnetisch überbrücken.



   <Desc / Clms Page number 1>
 



  Rotary magnet for adjustment angle below 90.
 EMI1.1
 

 <Desc / Clms Page number 2>

 
 EMI2.1
 Determination of the resistance or - in the case of alternating current - the impedance of the line section under consideration, a measurement that plays a role in the selective protection of line networks. The two armatures ml and m2 are symmetrical with respect to the central position "Keraetzt" so that when the two magnetic coils a1 and a2 are equally excited, their torques can be canceled has practically an astatic character in this range.

   As a result, the rotary magnet becomes a highly sensitive response element that deflects to one side or the other, depending on whether a certain limit impedance is exceeded or not reached.



   PATENT CLAIMS: 1. Rotary magnet for adjustment angles below 900, characterized in that the core of the fixed magnet coil is formed from four segment-shaped pole pieces, two of which are symmetrically arranged at the ends of the coil cavity, and from the rotating armature provided with two iron segments, which magnetically bridge the axial air gap between each two pole pieces.

Claims (1)

2. Drehmagnet nach Anspruch 1, dadurch gekennzeichnet, dass der Drehanker länger ist als der axiale Luftabstand der versehiedenpoligen Polschuhe. 2. Rotary magnet according to claim 1, characterized in that the rotating armature is longer than the axial air gap between the pole shoes with different poles. 3. Drehmagnet nach Anspruch 1, dadurch gekennzeichnet, dass der Drehanker schmäler ist als der Querschlitz zwischen je zwei gleichpoligen Polschuhen des gleichen Spulenendes. 3. Rotary magnet according to claim 1, characterized in that the rotary armature is narrower than the transverse slot between each two homopolar pole pieces of the same coil end. 4. Drehmagnet nach Anspruch l, dadurch gekennzeichnet, dass die Polschuhe einen die Spule umfassenden magnetischen Rückschluss besitzen. 4. Rotary magnet according to claim l, characterized in that the pole shoes have a magnetic yoke that encompasses the coil. 5. Drehmagnet nach Anspruch 4, dadurch gekennzeichnet, dass die Spule mit Eisen ummantelt ist. 5. Rotary magnet according to claim 4, characterized in that the coil is coated with iron. 6. Drehmagnet nach Anspruch 1, dadurch gekennzeichnet, dass Mittel vorgesehen sind, durch die eine, annähernd proportionale Änderung des Drehmomentes mit der Ankerstellung erreicht wird. 6. Rotary magnet according to claim 1, characterized in that means are provided through which an approximately proportional change in the torque is achieved with the armature position. 7. Doppeldrehmagnet nach Anspruch 1, dadurch gekennzeichnet, dass die beiden Magnetspulen von verschiedenen Stron : quellen erregt werden. 7. Double rotary magnet according to claim 1, characterized in that the two magnetic coils of different Stron: sources are excited. - 8. Doppeldrehmagnet nach Anspruch 7, dadurch gekennzeichnet, dass die Feldachsen der beiden Anker. auf entgegengesetzten'Seiten der Feldachsen der ihnen zugeordneten festen Pole liegen, so dass ihre-Drehmomente einander entgegenwirken. - 8. Double rotary magnet according to claim 7, characterized in that the field axes of the two armatures. lie on opposite sides of the field axes of the fixed poles assigned to them, so that their torques counteract each other. 9. Doppeldrehmagnet nach Anspruch 8, dadurch gekennzeichnet, dass beide Magnete desselben - nur auf. dem-geradlinigen Teil der Drehmomentkurve arbeiten, so dass er als empfindliches Ansprechorgan verwendbar ist.. 9. Double rotary magnet according to claim 8, characterized in that both magnets of the same - only on. work on the straight part of the torque curve so that it can be used as a sensitive response organ .. -- lu. Doppeldrehmagnet nach Anspruch 7, dadurch gekennzeichnet, dass die beiden Spulen von Strom-und Spannung an einer bestimmten Stelle eines Netzes derart erregt werden, dass der Apparat als ?-Quotientenmesser wirkt-und auf die Schwankungen der Impedanz anspricht. - lu. Double rotary magnet according to claim 7, characterized in that the two coils of Current and voltage are excited at a specific point in a network in such a way that the apparatus acts as a? Quotient meter and responds to the fluctuations in impedance.
AT113607D 1927-08-25 1928-07-04 Rotary magnet for adjustment angles below 90 °. AT113607B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE113607X 1927-08-25

Publications (1)

Publication Number Publication Date
AT113607B true AT113607B (en) 1929-06-25

Family

ID=5653440

Family Applications (1)

Application Number Title Priority Date Filing Date
AT113607D AT113607B (en) 1927-08-25 1928-07-04 Rotary magnet for adjustment angles below 90 °.

Country Status (1)

Country Link
AT (1) AT113607B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032844B (en) * 1954-02-18 1958-06-26 Siemens Ag Moving iron round coil measuring mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032844B (en) * 1954-02-18 1958-06-26 Siemens Ag Moving iron round coil measuring mechanism

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