SU142816A1 - Contactless switchgear on blocking generators - Google Patents

Description

Non-contact switchgears on block generators are known that are equipped with a switch designed to synchronously turn on (or turn off) a definite block generator depending on the input signal received.

The proposed contactless switchgear on the blocking generators differs from the known ones in that for the synchronization of the distributor, capacitors are connected in parallel with the windings of each blocking generator to the source of clock pulses.

A schematic diagram of the described switchgear is shown in the drawing.

Each blocking transistor / described distributor generator has two storage capacitors 2 and 3 connected in parallel with the movement windings of the feedback transformer 4. To start up any blocking generator, it is necessary to charge both of these capacitors. The capacitor 3 is charged during the operation of the previous stage due to the fall of the voltage on the load 5 through the resistance 6 and diodes 7 and prepares a corresponding sensation of the blocking generator to start. The counting input of a positive input to bus 8 ″ charges all capacitors 2, but only the blocking generator, which was prepared by charging capacitor 5, is started. During operation, capacitors 2 and 3 are periodically charged through diodes 9 and 10, respectively. The next blocking generator in turn cannot be started with the same impulse, since the appropriate selection of the resistance values of the p-capacitors (P, 6 3 12

No. 142816-2 2) a relatively slow charge of the capacitor i is ensured, the fast discharge of the capacitor 2.

Thus, the capacitor 2 is discharged before the shunting effect of the capacitor 3 is removed. The previous blocking generator is turned off by discharging the capacitor 2 by the output current of the pausing stage through the diode 13. The time of the capacitor 3 should be less than the follow-up period clock pulses received on the bus 8 "counting input.

When a negative pulse is applied to the bus 14, the discharge discharges all capacitors 2 and stops the working blocking generator. The same impulse triggers the auxiliary cascade of the LF transistor / 5, which prepares the start circuit of the first blocking generator of the switchgear. The auxiliary cascade is stopped by the first clock pulse and does not affect the operation of the device in the future.

The described switchgear can operate as a ring circuit, and with an open feedback circuit, and can find application in low-frequency telemechanics and computing systems.

Subject invention

Contactless switchgear on blocking generators, characterized in that, in order to synchronize the distributor, the source of clock pulses, in parallel with the windings of movement of each blocking generator, are connected capacitors.