Вимірювач асиметрії синфазності, протифазності та квадратури двофазної системи напруг

Abstract

The present invention relates to the measurement technology. The proposed meter for measuring asymmetry of phase coincidence, opposition, and quadrature of a two-phase voltage system contains a phase quadrature shifter, three frequency converters, a switching unit, a rotary transformer, a summing unit and a voltmeter. The first inputs of the frequency converters are connected to the terminal of the rotary transformer winding. The second input of the first frequency converter is connected to the first input terminal of the meter. The second input of the second frequency converter is connected to the second input terminal of the meter. The second input of the third frequency converter is connected to the first terminal of the meter via the first phase quadrature shifter. The output of the first frequency converter is connected to the first input of the summing unit via the second phase quadrature shifter. The output of the second frequency converter is connected to the second input of the summing unit. The output of the summing unit is connected to the first input of the switching unit. The second output of the switching unit is connected to the output of the third frequency converter. The output of the switching unit is connected to the voltmeter. The proposed meter allows the measurement sensitivity, accuracy, and response to be increased.