DE945861C - Self-balancing electromechanical compensator - Google Patents

Self-balancing electromechanical compensator

Info

Publication number
DE945861C
DE945861C DEM16272A DEM0016272A DE945861C DE 945861 C DE945861 C DE 945861C DE M16272 A DEM16272 A DE M16272A DE M0016272 A DEM0016272 A DE M0016272A DE 945861 C DE945861 C DE 945861C
Authority
DE
Germany
Prior art keywords
balancing
self
measuring mechanism
electromechanical
compensator
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
DEM16272A
Other languages
German (de)
Inventor
Dipl-Phys Erich Unger
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.)
Metrawatt AG
Original Assignee
Metrawatt 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 Metrawatt AG filed Critical Metrawatt AG
Priority to DEM16272A priority Critical patent/DE945861C/en
Application granted granted Critical
Publication of DE945861C publication Critical patent/DE945861C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/02Arrangements in which the value to be measured is automatically compared with a reference value
    • G01R17/06Automatic balancing arrangements
    • G01R17/08Automatic balancing arrangements in which a force or torque representing the measured value is balanced by a force or torque representing the reference value

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Description

Selbstabgleichende elektromechanische Kompensatoren sind meist in der Weise aufgebaut, daß das bewegliche Organ einen Stromregler betätigt, welcher über Verstärkerglieder den Meßstrom selbsttätig so einregelt, daß die gesamte Anordnung sich in kompensiertem Zustand befindet. Self-balancing electromechanical compensators are mostly in constructed in such a way that the movable member operates a current regulator, which regulates the measuring current automatically via amplifier elements so that the entire arrangement is in a compensated state.

Handelt es sich um Kompensation von Gleichspannung oder Gleichstrom, so ist das bewegliche Organ ein empfindliches Null-Instrument im Kompensationszweig, durch welches der Stromregler so lange betätigt wird, bis das Instrument zur Ruhe kommt. If it is a question of compensation of direct voltage or direct current, so the movable organ is a sensitive null instrument in the compensation branch, by which the current regulator is operated until the instrument comes to rest comes.

Bei Drehmomentkompensatoren, wie sie beispielsweise für Meß wertumformer oder elektrische Waagen benutzt werden, wirkt das Drehmoment der Meßgröße gegen ein vom Meßstrom (meistens mittels eines Drehspulmeßwerkes) erzeugtes Drehmoment, und der Stromregler wird durch dieses gesamte bewegliche Organ so lange bewegt bis der Meßstrom eine Größe erreicht hat, bei der beide Drehmomente, nämlich das der Meßgröße und das vom Meßstrom erzeugte, gleich groß sind. For torque compensators, such as those used for measuring transducers or electrical scales are used, the torque counteracts the measured variable a torque generated by the measuring current (mostly by means of a moving-coil measuring mechanism), and the current regulator is moved by this entire movable organ until the measuring current has reached a size at which both torques, namely that of the The measured variable and that generated by the measuring current are of the same size.

Der Aufbau von Geräten, die nach diesen bekannten Prinzipien arbeiten, ist sehr verschieden, je nach Art des verwendeten Stromreglers. Eine besonders einfache bekannte Ausführungsform stellt der Stromregler nach dem Suchspulverfahren dar. Bei diesem Gerät wird eine Spule in einem annäherungsweise homogenen Wechselfeld durch die Bewegung des beweglichen Organs der Kompensationsschaltung gedreht. Die in der Tauchspule je nach Winkelstellung derselben mehr oder weniger große induzierte Spannung wird in bekannter Weise verstärkt und dem Meßkreis zugeführt. Vorteilhaft ist bei der Anordnung, daß das Wechselfeld direkt mit der Netzspannung erzeugt wird, die Anordnung also ohne Hochfrequenzernrichtung arbeitet und ferner der mechanische Aufbau des gesamten Stromreglers äußerst einfach und damit wenig störanfällig ist. The construction of devices that work according to these known principles, is very different, depending on the type of current regulator used. A particularly simple one A known embodiment is the current regulator according to the search coil method. In this device, a coil is in an approximately homogeneous alternating field rotated by the movement of the movable member of the compensation circuit. the in the moving coil depending on the angular position of the same more or less large induced Voltage is amplified in a known manner and fed to the measuring circuit. Advantageous is with the arrangement that the alternating field is generated directly with the mains voltage, the arrangement thus works without high frequency equipment and furthermore the mechanical one Structure of the entire current regulator is extremely simple and therefore less prone to failure.

Nachteilig bei dieser Anordnung ist es jedoch, daß der Luftspalt, in welchem sich die Spule dreht, verhältnismäßig lang sein muß, so daß die darin herrschende Induktion sehr klein wird, und daß ferner die in der Tauchspule induzierte Spannung proportional dem Sinus des Verdrehungswinkels ist, also hoher Verstärkung bedarf. The disadvantage of this arrangement, however, is that the air gap, in which the spool rotates, must be relatively long, so that in it prevailing induction is very small, and that also induced in the moving coil Voltage is proportional to the sine of the twist angle, so high gain requirement.

Weiter sind Einrichtungen bekannt, bei welchen die Tauchspule sich senkrecht zwischen zwei Wechselfeldern gegengesetzter Phasenlage bewegt. Facilities are also known in which the plunger coil is located moved vertically between two alternating fields of opposite phase position.

Der Meßstrom wird dann nach Größe und Phasenlage der in der Tauchspule induzierten Spannung erzeugt Hierzu sind also offenbar zwei Feldspulen und ein pliasenabhängiger Verstärker geringer Empfindlichkeit nötig.The measuring current is then determined according to size and phase position in the plunger coil induced voltage generated For this purpose, there are apparently two field coils and one dependent on the plias Low sensitivity amplifier required.

Diese Nachteile werden bei einem selbstabgleichenden Kompensator, vorzugsweise einem nach dem Prinzip der Drehmomentkompensation arbeitenden Meßrwertumformer, dadurch vermieden, daß gemäß der Erfindung die Tauchspule bei Drehung der Meßwerkachse sich aus einer magnetischen Abschirmung heraus in den Luftspalt eines an Wechselspannung liegenden Elektromagneten bewegs. Auf diese Weise ändert sich bei sehr kleiner Bewegung der Tauchspule die dort induzierte Spannung vom Maximalwert bis praktisch auf Null. Durch die Ersparnis eines Feldmagneten und eines phasenempfindlichen Verstärkers vereinfacht und verbilligt sich die Anordnung erheblich. These disadvantages are avoided with a self-balancing compensator, preferably a transducer working according to the principle of torque compensation, avoided by the fact that according to the invention, the plunger coil when rotating the measuring mechanism axis out of a magnetic shield into the air gap of an alternating voltage lying electromagnet moving. This way it changes with very little movement the plunger coil the voltage induced there from the maximum value to practically zero. By saving a field magnet and a phase-sensitive amplifier the arrangement is simplified and significantly cheaper.

Auch der Leistungsbedarf des zweiten Erregermagneten entfällt (vgl. Figur). Dabei ist E der von einer Feldspule erregteWechselstrommagnet, A die Achse, an welcher das zu kompensierende Drehmoment auftritt, und T dse Tauchspule, in welcher die Wechselspannung induziert wird. D stellt die magnetische Abschirmung dar.The power requirement of the second exciter magnet is also omitted (cf. Figure). E is the alternating current magnet excited by a field coil, A is the axis, at which the torque to be compensated occurs, and T dse plunger coil, in which the alternating voltage is induced. D represents the magnetic shield.

Claims (1)

PATENTANSPRUCH: 5 elbstabgleichender elektromechanischerKompensator, vorzugsweise nach dem Prinzip der D rehmomentkomp ensation arbeitender Meßwertumfsrmer; dessen Stromregler aus einer an der Meßwerkachse befestigten Tauchspule besteht, dadurch gekennzeichnet, daß die Tauchspule bei Drehung der Meßwerkachse sich aus einer magnetischen Abschirmung heraus in den Luftspalt eines an Wechselspannung liegenden Elektromagneten bewegt. PATENT CLAIM: 5 self-balancing electromechanical compensator, Measured value transducers preferably working according to the principle of torque compensation; whose current regulator consists of a moving coil attached to the measuring mechanism axis, characterized in that the moving coil disengages when the measuring mechanism axis rotates a magnetic shield out into the air gap of an AC voltage lying electromagnet moves. Angezogene Druckschriften: »Archiv für Elektrotechnik«, Bd. 29, Heft 12, S. 850 bis 855. Attached publications: "Archives for Electrical Engineering", Vol. 29, Issue 12, pp. 850 to 855.
DEM16272A 1952-11-14 1952-11-14 Self-balancing electromechanical compensator Expired DE945861C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM16272A DE945861C (en) 1952-11-14 1952-11-14 Self-balancing electromechanical compensator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM16272A DE945861C (en) 1952-11-14 1952-11-14 Self-balancing electromechanical compensator

Publications (1)

Publication Number Publication Date
DE945861C true DE945861C (en) 1956-07-19

Family

ID=7297130

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM16272A Expired DE945861C (en) 1952-11-14 1952-11-14 Self-balancing electromechanical compensator

Country Status (1)

Country Link
DE (1) DE945861C (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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