SU1583853A1 - Device for measuring components of reactive part of two-terminal network - Google Patents

Abstract

The invention relates to the field of electrical measurements, in particular the separate measurement of the component resistances of a reactive two-pole network. The purpose of the invention is to enhance the functionality by separately measuring the L and C components of the reactive two-port network. The device contains generators 1, 15 sinusoidal voltage, in the first unbalanced bridge a pair of identical capacitors 2, 3 and a pair of inductive coils 4, 5, separation filters 6, 7 and 9, 10, in the second unbalanced bridge a pair of identical capacitors 11, 12 and a pair inductive coils 13, 14. The frequency transmission F 1 of separation filters 6 and 7 is different from the frequency of F 2 separation filters 9 and 10. 1 sludge.

Description

The invention relates to the field of electrical measurements, in particular separate measurement of the resistance components of a reactive bipolar.

The aim of the invention is the expansion of functionality by separately measuring the components of reactance, namely, capacitive and inductive nature.

The drawing shows a diagram of the device.

The device contains a sinusoidal voltage generator 1, two capacitors 2 and 3, inductive coils 4 and 5? isolation filters 6 and 7, the investigated reactive bipolar 8, filters 9 and 10. capacitors 11 and 12, inductive coils 13 'and 14, a sinusoidal voltage generator 15.

The investigated two-terminal reactive 8 through the separation filters 6 and 7 is connected to the first unbalanced bridge containing a pair of identical capacitors 2 and. 3 and a pair of identical inductive coils 4 and

5. and through filters 9 and 10 it is also connected to a second unbalanced bridge containing a pair of identical capacitors 11 and 12 and a pair of identical coils 13 and 14.

The transmission frequency of the isolation filters 6 and 7 is different from the transmission frequency f _{2 of the} separation filters 9 and 10. The first unbalanced bridge is powered by a sinusoidal voltage from the generator 1, the frequency of which is different from the frequency of the sinusoidal voltage generator 15 supplying the second unbalanced bridge.

The device operates as follows.

Sinusoidal signals with a frequency f, and f _g come from generators 1 and 15 to the diagonal terminals of the corresponding bridges. Moreover, at the output of the first bridge there is a voltage mismatch 4U,, portioned (ω, L, -.

W, C _x output of the second bridge mismatch pro

AU · -, proportional to (αζ L _v -;, ') ·.

, we get the system with two unknowns __1_).

__L)

Thus, two equations with 4ϋ _ή = K _f (w _t L _x - 4 U £ х ~ Where ω. = 2f? f, -

I ^with l

Μι known circular frequency of the generator 1 of the first bridge;

2Tf g - known circular. the frequency of the generator 15 of the second bridge;

unknown inductance bipolar 8;

unknown capacitance ^ of a two-terminal capacitor 8; proportionality coefficients, pre-determined for specific values of the circuit elements of the first and second bridges at frequencies to, and Cd ₂ · these equations, we obtain the solution of some values of the reactive part of the resistance.

The proposed device allows you to obtain separate information about the inductive and capacitive parts of the measured reactance.

Claims (1)

Claim A device for measuring the reactive component of the two-pole part comprising the generator, the unbalanced bridge with linear output and the analyzed reactive L, C-bipole, distinguishing by the fact that, in order to increase functionality by separate measurements ¹ 45 Nia L and C-reactive component two-terminal, it is equipped with a generator, a second unbalanced bridge with a linear output and two pairs of filters, and the ends of the investigated reactive two-terminal through the corresponding pairs of filters with different pass frequencies tions connected 'shoulders parallel identical both unbalanced bridges.