SU718894A1 - Pulse generator - Google Patents

Description

The invention relates to a pulse technique and can be used in automatic control systems. IG is known a pulse generator containing an electromagnetic relay, two capacitors, the first terminals of which are connected to the first output winding of an electromagnetic relay and one of the lUHH Power, resistors, and the second loop capacitors connected to the other power bus through series-connected break contacts of the electromagnetic relay and first and second resistors accordingly, the second terminal of the winding of the electr of the magnetic relay is connected via a diode to the second terminal of the second capacitor, in parallel to which through a closed contact A third resistor is connected to the magnetic relay connected to the second output of the electromagnetic relay coil in this generator; the pulse width is equal to the time the electromagnetic relay is in the triggered state tr k (k = -t pulse l p / A where K is a factor: R is resistance variable resistor in the capacitor discharge circuit; the resistance of the winding of the electromagnetic relay; capacitor capacitance; fromK the time of the start-up of the relay. The pulse duration depends on the resistance of the variable resistor nL (. When the resistance of the resistor decreases by l, down to zero the pulse duration. . The minimum pulse duration depends on the capacitance of the capacitor and the resistance of the winding of the electromagnetic relay. Further reduction of the pulse duration under such a scheme becomes impossible, which is a disadvantage of a pulse-multiplexing pulse. The purpose of the invention is to expand the range of generation frequencies. In order to achieve this sound in a pulse generator, it contains the value of the relay. two capacitors, iicpBi) ie the conclusions of Kotchry

connected to the first output winding of the electromagnetic relay and one of the power bus, the second capacitor leads connected to another power bus through the serially connected opening contacts of the electromagnetic relay and the first and second resistors, respectively, the second winding electromagnet, connected via a diode to the second output of the second capacitor, in parallel through which the third resistor, the fourth resistor connected to the second output of the magnet winding, is connected via the closing contact of the electromagnetic relay A relay is connected to an additional resistor and a diode, with an additional resistor connected in parallel to the first capacitor through a magnetic current contact, and an additional one connected between the closing contact of the electromagnetic relay and the free terminal of the fourth resistor. In the proposed generator pulse duration

. TO-(

-C.o.n,

.Nl

w%

where R is the resistance of the additional variable resistor; When the resistance of the resistor R decreases, the pulse duration is zero.

R

% MP

OTP.

From the formula, it can be seen that the first term with decreasing resistor R decreases, and the pulse duration is limited only by the release time of the relay. The minimum pulse duration becomes independent of the capacitor capacitance and the resistance of the electromagnetic relay.

Thus, in the proposed generator, the regulation in the direction of pulse duration is achieved more deeply, which allows to expand the range of generation frequencies.

The drawing shows the electrical circuit of the proposed pulse generator.

The pulse generator contains electromagnetic relay 1, capacitor 2, the discharge time of which determines the pulse duration, capacitor 3, the charging time of which decides the pause duration, variable resistor 4 for adjusting the pulse duration, variable resistor 5 for adjusting the pause duration, separation diode 6 to eliminate the relationship between the time defining the depots during their discharge,

contacts of electromagnetic relay 7 and 8, resistor 9 for charging capacitor 2, resistor 10 for discharging capacitor 3, variable resistor 11 for adjusting the long-term. These pulses, a separation diode 12 to eliminate the shunting effect of the resistor 11 on, the winding of the relay 1 when charging the capacitor 3.

The generator works as follows.

When power is applied to the device, the charge of the capacitors 2 and 3 starts. The capacitor 2 is charged through the resistor 9 and the opening contact 7. The capacitor 3 is charged through the variable resistor 5 and the disconnect

contact 8. Upon reaching the capacitor 3, the voltage required to operate relay 1, the relay is activated and switches its capacitors to the discharge with its contacts. The capacitor 3 is discharged through the making contact 8 and the resistor 10. The capacitor 2 is discharged through making contact 7 and one circuit through the variable resistor 11, and the other circuit through the diode 12, the variable resistor 4, the winding of the relay 1, supported the relay in the de-energized state. Upon reaching the discharge current of the capacitor 2 through the winding of the relay II, equal to the release current of the relay, the relay releases and the capacitors are switched on again.

The use of the proposed pulse generator makes it possible to expand the scope of application of the generator, since the frequency range of its generation is much wider in comparison with the known generators.

Claims (1)

1. USSR author's certificate number 610268 Cl. H 03 K 3/02, 01.09.76 (prototype).