SU373786A1 - FREQUENCY RELAY - Google Patents

Description

one

The invention relates to the field of automation and computer technology and can be used in devices of frequency locks.

Known frequency relays containing a static trigger, the inputs of which are connected to the output windings of two transformers, and filters.

A disadvantage of the known devices is the low speed and low reliability of operation.

The purpose of the invention is to improve the speed and reliability of the frequency relay.

For this purpose, the frequency relay is equipped with two thyristors, and the input transformers are supplied with additional windings, the anode-cathode circuit of each thyristor is connected to the additional winding of one input transformer, and the control electrode-cathode circuit of this thyristor is connected via a filter to the additional winding of another input transformer.

The drawing shows a diagram of the proposed frequency relay.

The circuit contains a static trigger / on thyristors 2 and 3, two input transformers 4 and 5, windings 6 and 7 of each of them are input, windings 5 and 9 are connected to the inputs of the corresponding thyristors, additional windings 10 and // are connected

to the anodes and cathodes of thyristors 12 and 13, respectively, and additional windings 14 and 15, to the control electrodes of the thyristors 12 and 13, respectively, through filters 16 and 17.

The device works as follows. When a series of pulses arrives at the winding 6 of the transformer 4, the thyristor 2 is ignited by pulses from the winding 8, and the pulses from the winding 15, passing through the filter 17, create an igniting potential on the control electrode of the thyristor 13 for the entire time of the series. As a result, the winding // of the transformer 5 is shorted, which prevents the passage of any impulses to the winding 7 of the transformer 5. Thus, the trigger will not switch to the input of the transformer 5 until the supply of the series of pulses to the winding 6 of the transformer 4 .

The circuit operates in a similar way when a series of pulses is applied, first to the winding 7 of the transformer 5, and then to the winding 6 of the transformer 4. At the same time, until the series of pulses is terminated, the thyristor 5 is opened to the winding 7.

Subject invention

A frequency relay containing a static trigger, whose inputs are connected to the output windings of input transformers,

and filters, characterized in that, in order to increase speed and increase the reliability of the relay, the thyristors are inserted into it, and the input transformers are provided with additional windings, the anode-cathode circuit of each thyristor is connected

to the first additional winding of the corresponding input transformer, and the control electrode-cathode circuit of this thyristor is connected via a filter to the second additional winding of another input transformer.

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