SU213968A1 - INDUCTIVE ASSOCIATED SHOULDERS FOR MEASURING PARAMETERS OF INDUCTANCE COILS - Google Patents

Description

This invention relates to the field of electrical measuring technicals.

Bridges with inductively coupled arms are known for measuring the parameters of inductors, which contain a power source, inductive voltage dividers, an inductive current multiplier, an exemplary active de-energization and an exemplary measure of inductance, made in the form of a T-shaped RC6PI composed of two resistors and single capacitor.

The proposed bridge provides greater measurement accuracy over a wide frequency range. This is achieved by using a circuit composed of "n RC cells connected in series and separated by cathode repeaters, the currents of which are added to the current comparator winding as an exemplary measure of inductance.

On the fit. 1 is a schematic diagram of a bridge; in fig. 2 is a schematic diagram of an exemplary measure of inductance.

The bridge contains a main voltage divider}, auxiliary voltage dividers 2 and 3, a comunator of currents 4, an unseen inductance coil 5, a power source 6, a zero-indicator 7, an exemplary resistor 8 and an exemplary measure of inductance 9 connected to points 10 and 11 1 of the circuit. The inductance is counted by the turns of the adjustable winding of the divider for the voltage 2, and the counting of the quality factor by the turns of the adjustable winding of the voltage divider 3.

An exemplary inductance measure is composed of resistors 12 with resistance R, capacitors 13 with capacitance C, and cathode (emitter) repeaters 14. The use of cathode (emitter) repeaters eliminates the load effect of the latter, their RC cells and . The voltage transfer ratio of a cathode (emitter) repeater can be considered to be equal to one, since the voltage transfer from one RC circuit to another can be almost incomplete and can be compensated for by mosh and the resistance of resistors 15 located in the cathode (emitter) circuits or windings of the comparator winding of the currents connected to the reference inductance measure.

When the number of cells is p, the axial current at the output of the model measure of inductance is inductive, and with a limited number of cells, the accuracy of the equivalent model measure and inductance is defined by the expression

the error of equivalent inductance rises.

The accuracy of the bridge can be provided in the range of 0.2-0.53 / o.

The subject is invented and

A bridge with inductively coupled shoulders to measure the parameters of inductors, containing a source of litany, inductive dividers, inductive comp.,. .

1

current torus, exemplary active capacitance, and exemplary inductance measure, characterized in that, in order to increase the measurement accuracy in a wide frequency range, it uses a circuit composed of "l RC cells connected in series" as exemplary oiepbi inductance and separated by cathode (emitter) repeaters, the currents of which are summed on the winding of a .co ml aerator and interpretations.

JO