SU136462A1 - A method for measuring the inherent capacity of inductors - Google Patents

Description

METHOD OF MEASURING THE OWN CAPACITY OF COILS

Said September 8, 1959 for .Vs 638362/24

to the Committee on the case of inventions and discoveries at the Council of Ministers of the USSR Published in the “Bulletin of inventions Ls 5 for 1961

The invention relates to methods for measuring the inherent capacitance of an inductor coil, carried out by determining the resonance at two times the frequency, and then calculating the desired capacitance.

The proposed method consists in that, to simplify the measurement process, two alternating high-frequency voltages are supplied to the coil, the amplitudes of which differ from each other by the same number of times as the frequencies, and the difference in the reactive components of the currents in the coil determine the magnitude of its own coil containers.

The drawing shows a block diagram of an apparatus for carrying out the proposed method.

The high frequency generator GW has two fixed frequencies MI and a regulating resistance is connected to the generator, with the help of which the required voltage UK is measured on the test coil L, as measured by the LV lamp voltmeter. The reactive components of the currents /, and / p coils, measured at each of the frequencies, are determined by the voltage drop at a constant resistance R-y. The phase-sensitive voltmeter of the FCF measures only that component of the voltage f / K, which is proportional to the reactive component of the current. The use of a phase-sensitive voltmeter is caused not only by the need to measure reactive currents / p and 1, but also by the fact that the phases of these currents may be opposite, which affects the algebraic difference:

The dependence of D / p on Co, the coil's own capacity, is determined by the expression: A / p coiCo (1 - 2), where: U and coi are voltage and frequency having a certain specific value, an is an integer number indicating How many times the voltage and inductance are different

d / r g /; - / ;.

No. 136462-2-stock, measured the first and second time. From this expression, the intrinsic capacitance of the CQ coil can be calculated.

Subject invention

The method of measuring the inherent capacity of inductors with counting at multiple fixed frequencies is different because, in order to simplify the measurement process, two alternating voltages are applied to the coil, the amplitudes of which differ in the same number of times as the frequencies, and the differences of the reactive component currents determine the value of the coil's own capacitance.

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