SU583493A1 - Timer relay - Google Patents

Description

one

And; the invention relates to E-automatics and can be used as a wide-range voltage / time converter.

Known capacitor time relays, in which the time interval determines | With the charge time (recharge) of the capacitor to a given voltage l.

The adjustment of the extractor time axis in them is carried out by changing the current (the charge of the capacitor or the voltage to which the charge is;); the capacitor. The magnitude of change in the time delay of such a turn is less than the multiplicity of change of the input signal.

However, such devices have a narrow range of adjustable time delay.

The closest in technical essence to finding; are capacitor time relays in which the change in the time delay of the drying is realized with the help of an input-controlled retroslider current 2. Such time relays make the most use of the supply voltage and capacitance of the driving capacitor time.

However, in this case the multiplicity of the regulator (lag time delay 1 does not exceed the multiplicity of the capacitor current change. And this multiplicity is often limited by the characteristics of the capacitor charge current source (for example, due to the effect of the reverse current of the collector junction of the transistor the input current of the threshold element that controls the voltage on the capacitor).

The aim of the invention is to extend the range of the smooth adjustment of the time delay.

Claims (2)

For this time relay, a current regulator containing an output value of which is a function of the control voltage, the time specifying the capacitor connected to the input of the threshold element | and the current regulator, is provided with additional 1second RC circuits, the resistors connected to the common point of connection is the time of the driving capacitor, the current regulator and the threshold element, and the other terminals of the mentioned RC circuits are connected to the second plate in the Conden-sagor moderator. Scheme of time relay is depicted on. Relay clipped from the controller currents 1,; the time of the driving capacitor 2, the threshold 3 and the KO-depy on the resistors 4 and the capacitors 5. In the initial state | modularizers 2 and 5 are discharged, the voltage at the input and output of the threshold element is zero. When the control voltage U- tta is applied, the charging of capacitors 2 to 5 sets up (GOK current regulator 1, as determined by Hanpst U ||. When the voltage on the capacitor 2 reaches the threshold element 3, the latter triggered and gives output signal. At the first moment after switching on, the entire current of the gok 1 regulator is switched to capacitor 2. As capacitor 2 charges, the proportion of the current branched to capacitors 5 increases. This long fraction depends both on the ratio of capacitors capacitance 5 and resistors 4 ta and from aBs the current fluids, current regulator 1. At current regulator currents 1, the voltage drop in the resistor 4 is small, and the equivalent capacitance is the drive time and the output is equal to the sum of the capacitors 2 and 5. The time delay at the same time is maximum. current torus 1 increases the voltage drop across the resistor 4. The capacitor, 2 is charged, is faster than capacitors 5, so that the threshold is triggered (the cost of the borers 5 is charged to a smaller | less than the capacitor 2. That is, equivalent capacity; As the current increases, the driver time decreases with the increase in the capacitor 12 capacitance. As a result, at the same time the regulator current changes, the response time varies in wider limits by 5 93 compared with the known: schemes. So, for example, with one RC-depi, a shunt capacitor 2, C5 10C2 (C2 and C5 - capacitors 2 and 5, respectively) and tenfold change of current of the current regulator, the time-delay control range reaches the most time-intensive RC-circuits and the ratio of capacitances Capacitors The time delay adjustment range can be obtained (with the same change in the regulator current) of 10–10 or more. The time relay can be triggered by any of the following known methods: power on, crimped (supply control calculate the time of the setting capacitor, etc., on the shadow of the shadow Formula from the time relay containing the current controller, the output value of which is a function of the control voltage, the time setting the 1 capacitor connected to the input of the Threshold element and to the current controller, From that, in order to expand the range of the smooth adjustment of the time delay, it is equipped with a series of additional C-circuits, the resistors of which are connected to the common connection point of the driving capacitor, current regulator and threshold element , but THER-mentioned findings upshl The C-aepey connected to the second electrode of the master time Kovda Satoru. information taken in, mania prv zkshyurtvze: 1. Druzhinin GV Relay. Energy, 1966, with. 19-41. . 2. Olsevich A. E. and Y). Two-base i diodes in automatics, M., En1rgi, 1972, p. 38-41, fig. 27 (a, b, e). chl