SU1310746A1 - Converter of parameters of passive non-resonance two-terminal networks - Google Patents

Abstract

The converter of passive non-resonant two-pole parameters contains a power source 1, a two-pole 2 under study, consisting of impedance 3 and complex conductivity 4, an amplifier 5, an exemplary impedance 6, a controlled element 7, a voltage divider 8, voltmeters 9,12, a detector 10 quasi-equilibrium and programmable phase shifter 1I. The invention extends the functionality of the converter: the parameters of the impedance 3, connected in series with the complex conductivity 4, whose loss tangent is known, are measured. 1 il. 2 iS (L v3 4 OS

Description

1-1

The invention relates to electrical measuring equipment, in particular, to the field of measuring the components of complex alternating current values, and can be used to measure the parameters of passive nonresonant two-terminal cells consisting of a series-connected convertible element and convertible complex conductivity, one of the parameters of which is the loss tangent or good quality is known.

The purpose of the invention is to expand the functionality of the converter by measuring the parameters of the impedance connected in series with the complex conductivity, the loss tangent of which is known.

The drawing shows a block diagram of the transducer parameters passive non-resonant two-terminal network.

The converter contains a power source 1, a two-port circuit under study 2 with terminals 2.G for connecting consisting of impedance 3 and series-connected conductivity 4, amplifier 5, exemplary impedance 6 controlled element 7, voltage divider 8, voltmeter 9, detector 10 quasi-equilibrium, programmable phase shifter 11 and the second voltmeter 12

In this case, the inverting input of amplifier 5 is connected to the output through series-connected exemplary resistance 6 and controlled element 7. The non-inverting input of amplifier 5 is connected to the outputs of amplifier 5 and voltmeter 9 through a voltage divider 8 and connected to the outputs of amplifier 5 and a programmable phase shifter Inconsistently, and the output from the control input of the controlled element 7, with the output of which the second voltmeter 12 is connected. The input of the programmable phase shifter 1 is connected to the output of the source ka 1 and one of the power terminals 2,1: investigated for connecting the two-pole, and the other terminal is connected to the invariant 2,1 vertiruyuschim input amplifier 5, the second input source 1 and power divider 8 are connected to a common bus.

Converter parameters passive non-resonant two-terminal works as follows.

62

The output voltage of amplifier 5 is determined from

TT p

 Z, (K.) - R,

where R is the model value

impedance 6;

Z R, -f-Z is the resistance of the two-port 2 under study, consisting of a series-connected resistor (R,) and a complex resistance (Z); , / and - coefficient (3) is the division patient of the divider 8;

K. the transfer coefficient of the controlled element 7; and and Ug - output vol. equal element 7 and

divider 8 voltage When the voltage at the output of the amplifier 5 and the voltage of the programmable phase shifter I1 turned relative to the voltage from the power supply 1 at an angle equal to the argument of the complex conductivity 4 of the two-terminal circuit 2, i.e. subject to quasi-equilibrium

  to-to; - t.

which is achieved by changing the transmission coefficient of the controlled element 7 by the signal from the detector 10 of quasi-equilibrium, the voltage at the output of the amplifier 5 supplied to the voltage meter I O

40

and, -E

  K.

()

where Y is the conductivity of the element of the two-port being investigated, directly proportional to the module of the complex conductivity 4 of the two-pole two being studied,

The resistance of the element 3 of the studied bipolar is determined from the 50 ratio

3

If the impedance 55 3 of the studied bipolar is represented by the capacitance or inductance, then instead of the reference impedance 6 neo.

exemplary capacitance or exemplary inductance.

Claims (1)

Invention Formula A converter of passive nonresonant two-pole parameters, containing an amplifier, with an inverting input of which the first terminal is connected to connect the two-pole device under test and an exemplary impedance, and a first voltmeter and the first input of the quasi-equilibrium detector with an output, the second voltmeter is connected to the second output of the exemplary complex resistance and the output terminal of the quasi-equilibrium detector, and the second voltmeter is connected to the second output of the exemplary complex resistance and the output terminal of the quasi-equilibrium detector element whose first input is connected to Editor A. Ogar Compiled by N, Krinov Tehred A. Kravchuk Corr Sub 188 7 / A2 Circulation 731 VNSHSH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 -Production and printing company, Uzhgorod, Project St.,. , P- 3107464 the output of the quasi-equilibrium detector, the power source through a programmable phase shifter is connected to the second quasi-equilibrium 5 s detector input, characterized in that, in order to expand its functionality, a voltage divider is introduced into it, the input of which is connected to the output of the amplifier and the second 10 is the input of the controlled element, and the output of the voltage divider is with the non-inverting input of the amplifier, and the second terminal for connecting the two-terminal device being connected is connected to f5 is the first input of the power supply, the second output of which is connected to the second output of the voltage divider and the common bus. Proofreader A.Obruchar Subscription