DE421092C - Method for determining the amplitude and phase of an alternating voltage by means of compensation - Google Patents

Method for determining the amplitude and phase of an alternating voltage by means of compensation

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Publication number
DE421092C
DE421092C DEH98127D DEH0098127D DE421092C DE 421092 C DE421092 C DE 421092C DE H98127 D DEH98127 D DE H98127D DE H0098127 D DEH0098127 D DE H0098127D DE 421092 C DE421092 C DE 421092C
Authority
DE
Germany
Prior art keywords
phase
measuring wires
amplitude
same
determining
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
DEH98127D
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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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun 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 Hartmann and Braun AG filed Critical Hartmann and Braun AG
Priority to DEH98127D priority Critical patent/DE421092C/en
Application granted granted Critical
Publication of DE421092C publication Critical patent/DE421092C/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/28Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Description

Verfahren zur Bestimmung der Amplitüde und Phase einer Wechselspannung durch Kompensation. Bei dem Erfindungsgegenstand des Patentes q. 11649 handelt es sich um ein Isompensationsmeßverfahren, bei dem die zu untersuchende Wechselspannung kompensiert wird durch eire in bezug auf Amplitüde und Phase veränderliche Kompzn-ationsspannuag, welche aus zwei hintereinandergeschalteten, um go° in der Phase gegeneinander verschobenen Teilspannungen zusammengesetzt ist. Die beiden Teilspannungen wurden als regelbare Spannungsabfälle an zwei gleichartigen, mit Schleifkontakten versehenen und leitend miteinander verbundenen Meßdrähten abgegriffen, die von zwei um go° in der Phase gegeneinander verschobenen Wechselströmen gleicher Stromstärke durchflossen werden, derart, daß das Verhältnis d--r wirksamen Drahtlänge zur abgegriffenen Teilspannung bei beiden Meßdrähten dasselbe ist.Method for determining the amplitude and phase of an alternating voltage through compensation. In the subject matter of the patent q. 11649 it is is an Isompensationsmeßverfahren in which the AC voltage to be examined is compensated by a compensation voltage that is variable in terms of amplitude and phase, which consists of two series-connected, shifted by go ° in phase against each other Partial stresses is composed. The two partial voltages were considered to be controllable Voltage drops at two similar, sliding contacts provided and conductive interconnected measuring wires tapped by two to go ° in phase alternating currents of the same amperage that are shifted against each other are flowed through, such that the ratio d - r effective wire length to the tapped partial voltage is the same for both measuring wires.

In manchen Fällen ist es von Vorteil, mit zwei ungleichar;igen Melldrähten arbeiten zu können, also mit zwei Meßdrähten, die nicht denselben Widerstand besitzen. Vorliegende Erfindung bietet hierzu eine einfache Möglichkeit. Dies wird dadurch erreicht, daß die Stromstärken der in den Meßdrähten fließenden Wechselströme ungleich gewählt werden, und zwar derart, daß der einer Längeneinheit entsprechende Spannungsabfall bei beiden Meßdrähten derselbe ist. Es ist dann ebenfalls die Bedingung erfüllt, däß das Verhältnis der wirksamen Drahtlänge zur abgegriffenen Teilspannung bei beiden Meßdrähten dasselbe ist.In some cases it is advantageous to use two unequal connecting wires to be able to work, i.e. with two measuring wires that do not have the same resistance. The present invention offers a simple way of doing this. This is because of this achieved that the currents flowing in the measuring wires Alternating currents be chosen unequal, in such a way that the one length unit corresponding Voltage drop is the same for both measuring wires. It is then also the condition fulfilled, that the ratio of the effective wire length to the tapped partial voltage is the same for both measuring wires.

Eine Anwendung des Erfindungsgedankens zeigt als Beispiel die in der Abbildung schematisch dargestellte Meßanordnung, welche besondere Vorteile bietet.An application of the inventive concept shows as an example that in FIG Figure schematically shown measuring arrangement, which offers special advantages.

M1 und M2 entsprechen zwei in ihren Widerständen verschiedenen Meßdrähten, welche gleiche Länge besitzen, wobei ihre Mittelpunkte A1 und A2 leitend miteinander verbunden sind. Ml, dem ein induktions- und kapazitätsfreier Widerstand R, parallel geschaltet ist, ist mit der Primärspule Si des Lufttransformators T in Reihe geschaltet, während M2 über einen induktions- und kapazitätsfreien Widerstand R2 an die Sekundärspule S2 angeschlossen ist. Bei geeigneter Bemessung der Anordnung kann erreicht'werden, daß der Phasenwinkel zwischen Ei und E2 mit genügender Annäherung (Abweichung höchstens eine Winkelminute) go° beträgt.M1 and M2 correspond to two measuring wires with different resistances, which have the same length, with their centers A1 and A2 conducting to one another are connected. Ml, to which an induction and capacitance-free resistor R, in parallel is connected, is connected in series with the primary coil Si of the air transformer T, while M2 is connected to the secondary coil via an inductance and capacitance-free resistor R2 S2 is connected. With a suitable dimensioning of the arrangement it can be achieved that the phase angle between Ei and E2 approximates sufficiently (deviation at most one angular minute) go °.

Die an den Meßdrähten wirksamen Spannungen EI und E2 müssen, da die Meßdrähte gleiche Länge besitzen, gleich groß gewählt werden. Diese Spannungen ergaben sich aus den Gleichungen wo w die Kreisfrequenz, -4 die gegenseitige Induktivität des Lufttransformators bedeutet, während mit Mi, M2, Ri, R2 die Widerstandswerte der Meßdrähte und der zugehörigen Widerstände bezeichnet sind. Sind beispielsweise M1, M2 und R1 konstant, so können bei gegebener Kreisfrequenz die Werte n und R2 stets so gewählt werden, daß El = E2 wird.The voltages EI and E2 effective at the measuring wires must be chosen to be of the same size since the measuring wires are of the same length. These tensions were obtained from the equations where w is the angular frequency, -4 is the mutual inductance of the air transformer, while Mi, M2, Ri, R2 denote the resistance values of the measuring wires and the associated resistances. If, for example, M1, M2 and R1 are constant, then at a given angular frequency the values n and R2 can always be chosen so that E1 = E2.

Die aus M1 und R1 bestehende Widerstandskombination sowie die Primärspule SI des Lufttransformators T werden vom Meßstrom J durchflossen, welcher bei der Messung stets auf einen konstanten Wert eingestellt wird, so daß sich ein zur bequemen Ablesung gee:gneter Proportionalitätsfaktor zwischen wirksamer Drahtlängeundabgegriffener Teilspannung ergibt.The resistor combination consisting of M1 and R1 and the primary coil SI of the air transformer T are traversed by the measuring current J, which at the Measurement is always set to a constant value, so that a comfortable Reading gee: gneter proportionality factor between the effective wire length and the tapped Partial stress results.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Bestimmung der Amplitude und Phase einer Wechselspannung durch Kompensation nach Patent 411649, dadurch gekennzeichnet, daß die beiden Meßdrähte nicht gleichartig, sondern ungleichartim beschaffen sind und daß die Stromstärxen der in den Meßdrähten. fließenden Wechselströme ungleich gewählt werden, und zwar derart, daß der einer Längeneinheit entsprechende Spannungsabfall bei beiden Meßdrähten derselbe ist. PATENT CLAIMS: i. Procedure for determining the amplitude and phase an alternating voltage by compensation according to patent 411649, characterized in that that the two measuring wires are not of the same type, but of different nature and that the currents in the measuring wires. flowing alternating currents unequal be chosen, in such a way that the voltage drop corresponding to a unit of length is the same for both measuring wires. 2. Einrichtung zur Ausführung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß die beiden Meßdrähte (Ml, M2) gleiche Längen besitzen und ihre Mittelpunkte (Al, A2) leitend derart miteinander verbunden sind, daß die an den Meßdrähten wirksamen Spannungen (EI, E2) gleich groß sind. 2. Device for carrying out the method according to claim i, characterized in that the two measuring wires (Ml, M2) have the same lengths and their centers (Al, A2) are conductively connected to one another in such a way that the voltages (EI, EI, E2) are the same size.
DEH98127D 1924-03-29 1924-03-29 Method for determining the amplitude and phase of an alternating voltage by means of compensation Expired DE421092C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH98127D DE421092C (en) 1924-03-29 1924-03-29 Method for determining the amplitude and phase of an alternating voltage by means of compensation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH98127D DE421092C (en) 1924-03-29 1924-03-29 Method for determining the amplitude and phase of an alternating voltage by means of compensation

Publications (1)

Publication Number Publication Date
DE421092C true DE421092C (en) 1925-11-06

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Application Number Title Priority Date Filing Date
DEH98127D Expired DE421092C (en) 1924-03-29 1924-03-29 Method for determining the amplitude and phase of an alternating voltage by means of compensation

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DE (1) DE421092C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013362B (en) * 1954-08-20 1957-08-08 Siemens Ag Compensation circuit with switching devices for measuring a large number of individual resistances

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013362B (en) * 1954-08-20 1957-08-08 Siemens Ag Compensation circuit with switching devices for measuring a large number of individual resistances

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