SU1402953A1 - Device for measuring unstable a.c. voltage - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to increase the speed and expand the functionality of the meter. The meter contains a source of reference voltage 1, one-half-period converters 2 and 3 of the root-mean-square value of the voltage, and a zero-body 6. The introduction of the switch 4, the log-meter 5 of the zero-body 7 and the formation of new functional connections provide a measurement of the asymmetry of the voltage under study. 1 pe. with b

Description

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; The invention relates to a game measuring technique, namely, radio measuring devices, and can be used to measure the relative voltage instability during calibration of measuring generators and alternating current power sources.

zero-organ 6 and the first output of source 1 of reference voltages for measuring instability or from the output of zero-organ 7 and the second output of source 1 of reference voltages for measuring instability, where dU and dV are the differences of the current RMS values

The aim of the invention is direct and negative half-a-half.

; improvement of speed and expansion of functional capabilities; due to the measurement of the asymmetry of the test voltage.

: The drawing shows a flowchart for measuring the voltage instability of: alternating current. A: The meter contains a source of 1 reference voltages, half-wave converters 2 and 3 of the mean-20 ratios of the voltage, the outputs of which are connected to the corresponding inputs of the switch 4, the outputs of which are connected to the inputs of the logometer 5, the outputs of the source 1 of the reference nap-25; connections are connected with the corresponding: inputs of the switch 4 and with the first: inputs of the zero-organs 6 and 7, the second inputs of the tiepBoro and the second zero-organs; 6 and 7 are connected respectively to you: the moves of the first and second half-half : transducers 2 and 3 sred;; The voltage value is zero, the outputs of the zero-organs 6 and 7 are connected to the corresponding inputs of switch A.

The device works as follows:

The test voltage, the instability of which must be measured, d ,. It is applied simultaneously to two one-way: luperiodic converters 2 and 3 of the rms voltage, one of which selects negative half-periods of the signal under study, the other - positive. From converters 2 and 3, signals are fed to one of the inputs of zero-bodies 6 and 7, respectively, and to the input of switch 4. From the outputs of source 1 of reference voltages, signals arrive at other inputs of zero-bodies 6 and 7 and inputs of switch 4. Differential voltage from the outputs of the zero-bodies 6 and 7 is fed to the input of the switch 4. The outputs of the latter are connected to the inputs of the gauge 5. Depending on the state of the switch, the inputs of the gauge can be supplied with voltage from the output

45

50

55

input and reference voltage; 11 (5, and - values of positive and negative reference stresses.

In the presence of asymmetry of the signal under study, the readings of the logometer with

and dU

measurement -pt- and -.-; - are different. In and about U (,

In this case, when the switch is installed in the third position, the asymmetry of the voltage under investigation is measured as the ratio of the rms values of its positive and negative values.

half-periods - thgg. The measured asymmetry value allows

corrections to the measurement of instability.

Claims (1)

Invention Formula An ac voltage instability meter containing a zero-body, the first input of which is connected to the output of a reference voltage source, and two voltage converters, the inputs of which are connected to the input of a device, characterized in that, in order to improve speed and functionality the account for measuring the asymmetry of the signal, the second null-organ, the commutator, the logometer, and the voltage converters are made in the form of single-wavelength converters of the rms voltage, the first input of the second null-organ is connected to the second output of the voltage source, the output of the first one-half-converter of the RMS voltage is connected to the second input of the first zero-organ and the first input of the switch, the output of the second one-wave-converter of the root-mean square voltage is connected the second input of the second zero-organ and the second input of the switch, outputs per5 0 5 o , five 0 five input and reference voltage; 11 (5, and - values of positive and negative reference stresses. In the presence of asymmetry of the signal under study, the readings of the logometer with and dU measurement -pt- and -.-; - are different. In and about U (, In this case, when the switch is installed in the third position, the asymmetry of the voltage under investigation is measured as the ratio of the rms values of its positive and negative values. half-periods - thgg. The measured asymmetry value allows corrections to the measurement of instability. Invention Formula An ac voltage instability meter containing a zero-body, the first input of which is connected to the output of a reference voltage source, and two voltage converters, the inputs of which are connected to the input of a device, characterized in that, in order to improve speed and functionality the account for measuring the asymmetry of the signal, the second null-organ, the commutator, the logometer, and the voltage converters are made in the form of single-wavelength converters of the rms voltage, the first input of the second null-organ is connected to the second output of the voltage source, the output of the first one-half-converter of the RMS voltage is connected to the second input of the first zero-organ and the first input of the switch, the output of the second one-wave-converter of the root-mean square voltage is connected the second input of the second zero-organ and the second input of the switch, outputs ln 1402953 the first and second, fourth, fifth, and sixth and second outputs of the source are the reference inputs of the switch, the outputs of which are connected to the inputs of the voltage meter respectively.