DE550777C - Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit - Google Patents

Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Info

Publication number
DE550777C
DE550777C DEP62249D DEP0062249D DE550777C DE 550777 C DE550777 C DE 550777C DE P62249 D DEP62249 D DE P62249D DE P0062249 D DEP0062249 D DE P0062249D DE 550777 C DE550777 C DE 550777C
Authority
DE
Germany
Prior art keywords
measuring device
power factor
alternating current
variable
bridge circuit
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
DEP62249D
Other languages
German (de)
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.)
ERWIN PAUL
Original Assignee
ERWIN PAUL
Publication date
Priority to DEP62249D priority Critical patent/DE550777C/en
Application granted granted Critical
Publication of DE550777C publication Critical patent/DE550777C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Description

Meßeinrichtung zur Bestimmung von Wechselstromleistungen veränderlicher Frequenz und veränderlichen Leistungsfaktors in Brückenschaltung Die vorliegende Erfindung dient dem Zwecke der Bestimmung von Wechselstromleistungen veränderlicher Frequenz und veränderlichen Leistungsfaktors. Die bisher dazu verwandte Dreivoltmetermethode besaß den Nachteil großer Umständlichkeit durch die Errechnung der Leistung und großen Aufwandes durch drei verschiedene Meßinstrumente, um die Leistung des Verbrauchers dauernd kontrollieren zu können, und außerdem war es nicht möglich, außer der Leistung auch den jeweiligen -Wirkwiderstand beobachten zu können.Measuring device for determining alternating current powers in a variable manner Frequency and variable power factor in bridge circuit The present Invention serves the purpose of determining alternating current powers more variable Frequency and variable power factor. The three volt meter method used to date had the disadvantage of great inconvenience due to the calculation of the performance and great effort through three different measuring instruments to determine the performance of the consumer To be able to control constantly, and besides, it was not possible, except for the performance also to be able to observe the respective effective resistance.

Dieser Nachteil ist durch vorliegende Erfindung behoben. Sie stellt nach der Abbildung eine Brückenschaltung dar, in welcher R3 den Verbraucher, z. B. einen Lautsprecher, W ein geeignetes, auf den Eigenverbrauch in Watt und zugleich auf Strommessung in Ampere geeichtes Hitzdrahtinstrument, J ein frequenzunabhängiges Galvanometer, z. B. ein Thermoinstrument, und R, und R2 zwei gleichwertige induktionsfreie Normalwiderstände darstellen, die in C miteinander verbunden sind.This disadvantage is eliminated by the present invention. She poses after the figure is a bridge circuit in which R3 the consumer, z. B. a loudspeaker, W a suitable, on the own consumption in watts and at the same time Hot-wire instrument calibrated to measure current in amperes, J a frequency-independent instrument Galvanometer, e.g. B. a thermal instrument, and R, and R2 two equivalent induction-free Represent normal resistances that are connected to each other in C.

Das in der Brückendiagonale liegende Galvanometer J ist in Ohm geeicht. Die Eichung kann mit Gleichstrom erfolgen, wobei an Stelle des Verbrauchswiderstandes R$ ein veränderlicher Normalwiderstand geschaltet ist, dessen Werte jeweils auf der Skala von J aufgetragen werden.The galvanometer J located in the bridge diagonal is calibrated in ohms. The calibration can be done with direct current, whereby instead of the consumption resistance R $ a variable normal resistor is connected, the values of which are respectively on can be plotted on the J scale.

Wird nun der Verbrauchswiderstand eingesetzt, so gestattet J die direkte Ablesung des jeweiligen Wirkwiderstandes ohne Rücksicht auf Frequenz und Leistungsfaktor bei Wechselstrommessung. Mit Hilfe des Widerstandes des Wattmeters RW, der bekannt ist, und der abgelesenen Wattmeterleistung Nu, ist die wirkliche Leistung des Verbrauchers 7V-- cnfnrt bestimmbar nach der Formel N, = wo R" der durch J angezeigte Wirkwiderstand von R" ist.If the consumption resistance is now used, then J allows the direct reading of the respective effective resistance without taking into account the frequency and power factor when measuring alternating current. With the help of the resistance of the watt meter RW, which is known, and the read watt meter power Nu, the real power of the consumer 7V - cnfnrt can be determined according to the formula N, = where R "is the resistance of R" indicated by J.

Ist das Wattmeter außerdem noch in Ampere geeicht und liegt parallel zum Verbraucher ein Voltmeter h, so ist damit die Scheinleistung bestimmbar und folglich durch die Kenntnis der Schein- und Wirkleistung auch der Leistungsfaktor und die Dämpfung.Is the wattmeter also calibrated in amperes and is parallel a voltmeter h to the consumer, so the apparent power can be determined and consequently, knowing the apparent and real power, also the power factor and the attenuation.

Der besondere Vorteil dieser ganzen Einrichtung besteht also darin, ohne großen Aufwand und schnell während des Betriebes die wichtigsten Wechselstromgrößen. bei veränderlicher Frequenz zu bestimmen.So the particular advantage of this whole facility is that the most important alternating currents quickly and easily during operation. to be determined with a variable frequency.

Claims (2)

PATENTANSPRÜCHE.: i. Meßeinrichtung zur Bestimmung von Wechselstromleistungen veränderlicher Frequenz und veränderlichen Leistungsfaktors in Brückenschaltung, dadurch gekennzeichnet, daß in dem einen Brückenzweig der Verbrauchswiderstand, z. B. .der Lautsprecher, in Serie mit einem Hitzdrahtwattmeter und im anderen Zweig zwei Normalwiderstände liegen, während in die Diagonale der Brücke ein Galvanometer gelegt ist, das auf den jeweiligen Wirkwiderstand des Verbrauchers geeicht ist. CLAIMS: i. Measuring device for determining alternating current powers variable frequency and variable power factor in bridge circuit, characterized in that in one branch of the bridge the consumption resistance, z. B.. The loudspeaker, in series with a hot wire wattmeter and in the other branch two normal resistances lie, while in the diagonal of the bridge a galvanometer is placed, which is calibrated to the respective effective resistance of the consumer. 2. Meßeinrichtung nach Anspruch i, dadurch gekennzeichnet, daß zur gleichzeitigen Bestimmung der Scheinleistung das Hitzdrahtwattmeter auch in Ampere geeicht ist und parallel zum Verbraucher ein Voltmeter geschaltet ist.2. Measuring device according to claim i, characterized in that the simultaneous Determination of the apparent power the hot wire wattmeter is also calibrated in amperes and a voltmeter is connected in parallel to the consumer.
DEP62249D Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit Expired DE550777C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP62249D DE550777C (en) Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP62249D DE550777C (en) Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Publications (1)

Publication Number Publication Date
DE550777C true DE550777C (en) 1932-05-19

Family

ID=7389903

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP62249D Expired DE550777C (en) Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Country Status (1)

Country Link
DE (1) DE550777C (en)

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