SU1580402A1 - Passive integrator - Google Patents

Abstract

The invention relates to automation and computing and is intended to convert analog values, in particular for measuring the magnetic flux in transformers, reactors, and voltage integration. The purpose of the invention is to increase the linearity of the passive integrator and increase the integration time. The passive integrator contains a step-up transformer 1, a resistor 2 and a capacitor 3 of an integrating RC circuit, a limiting resistor 4, a correction capacitor 5, a limiting resistor 6, a correction inductance 7, an accumulating capacitor 8. On the capacitor 8 a total signal is obtained due to the action of all elements and the corresponding perfect integration within the integration time. 2 Il.

Description

9 - Uix rectangular impulse, at the 30 end. Decrease in resistance pe10 11

.55

40

stepping from the sensor of the integrated voltage to the input of the transformer;

transformed pulse U1; the voltage Ug on the capacitor 8 in the absence of elements 4-6;

12- U g in the absence of elements

6 and 7;

13- Ug in the absence of elements

4, 5 and 7;

14- Ug as output voltage

passive integrator.

We analyze the work of the integrator for the case of switching it on at a constant voltage, i.e. the effect of a rectangular impulse of unlimited length, since it is known that the correct integration of a rectangular impulse guarantees the correct integration of voltage of any form, since any KPHBVIO can be represented as the sum of a sufficiently large number of rectangular impulses.

The principle of the integrator lies in the fact that on capacitor 8 E5 we get a total signal due to the action of all elements and corresponding to the ideal integrators increases the signal level of the corresponding sections at the output as well as the increase in capacitance of the capacitor 5, and an increase in the capacitance of the capacitor 3 reduces the signal of the initial part and makes the characteristic more flat. The scheme allows to obtain

U bich.

jj- 1 dl

point in time

45

50

T, when the correct integration ends. For a simple RC chain, as mentioned, this ratio is about 0.1, i.e. This scheme, even without a transformer, increases this ratio by an order of magnitude. When it is turned on through a transformer with a transformation ratio K, this ratio increases even in K

times and make up. Soot

iwh ui

Correspondingly, the integration time can be increased by 10 K, while maintaining the same slope of the characteristic, by selecting the appropriate circuit parameters.

Transformer and inductance are performed on cores of material with stable magnetic permeability at high frequencies.

the end of Decrease in resistance pe5

The zistor increases the signal level of the corresponding sections at the output as well as the increase in the capacitance of the capacitor 5, and the increase in the capacitance of the capacitor 3 reduces the signal of the initial part and makes the characteristic more gentle. The scheme allows to obtain a ratio of bih.

jj- 1 dl

point in time

T, when the correct integration ends. For a simple RC chain, as mentioned, this ratio is about 0.1, i.e. This scheme, even without a transformer, increases this ratio by an order of magnitude. When it is turned on through a transformer with a transformation ratio K, this ratio increases even in K

times and make up. Soiot ui

Correspondingly, the integration time can be increased 10 K times while maintaining the same slope of the characteristic by selecting the appropriate circuit parameters.

The transformer and inductance are performed on cores of a material having a stable magnetic permeability at high frequencies.

FIG. 2

Claims (1)

Claim, A passive integrator containing an integrating RC circuit, characterized in that, in order to increase the linearity of the integrator and increase the integration time, a correction capacitor, a limiting resistor, a correction inductance, a shunt resistor, a capacitor and a step-up transformer, the primary winding of which is the input of the passive integrator, between the terminals of the secondary winding of the step-up transformer are included integrating RC-. a circuit and a series-connected limiting resistor, a correction capacitor and an accumulating capacitor, the plates of which are the output terminals of the passive integrator, and between the common terminal of the resistor and capacitor of the integrating RC circuit 25 and the common terminal of the correction and accumulating capacitors are connected a parallel shunt resistor and a corrective inductance. 30, p