SU965855A1 - Phase-responsive track receiver - Google Patents

Description

(54) PHASE-SENSITIVE TRACK RECEIVER

one

The invention relates to railway automation and telemechanics, in particular to elements of electric rail circuits.

Phase-sensitive traveling receivers are known, containing a traveling, local and isolating transformers, a capacitor and a generator connected to the secondary winding of a traveling transformer, a receiving relay connected to the secondary winding of an isolating transformer through one jack, the other of which is connected to one capacitor of the primary winding. the output of which is connected to one output (for the secondary winding of the local transformer 1.

A disadvantage of the known devices is the lack of relay properties with respect to the input signal, which reduces the reliability of the device when the input signal level changes. i

The purpose of the invention is to increase the reliability of work.

The goal is achieved by the fact that the device is equipped with an isolation transformer, the secondary winding jcoToporo

are sciens with three leads and trinistors, with the secondary lead of the isolation transformer connected to the other lead of the primary winding of the isolator. of a transformer with a different output of the secondary winding of a local transformer and with cathodes of tripistors, the anodes of which are connected to the terminals of the capacitor, and the control electrodes to the other two terminals, respectively.

10 isolation transformer, the primary winding of which is connected to the outputs of the he-. nerator

The drawing shows the principal

15 diagram of the device.

Claims (1)

The device contains a track transformer 1 with primary 2 and secondary 3 windings, a local transformer 4 with primary 5 and secondary 6 windings, an isolating transformer 7c primary 8 and secondary 9 windings, separation transfer mat 10 with primary 11 and secondary 12 windings. Extreme winding leads 12 3 of transformer 10 are connected to control electrodes of trinistor 13 and 14. Trintores anodes 13 and 14 are connected to capacitor 15 leads, as well as one winding 6 lead of local transformer 4 and one winding of insulating transformer 7. The second yyvody said windings are connected to the average output of the winding 12 of the isolation transformer 10 and with the cathodes of the trinistors 13 and 14. The generator 16 is powered from the winding 3 of the track transformer 1. To the outputs of the generator 6 connects the winding and an isolation transformer 10. A receiving relay 18 is connected to the winding 9 of the isolating transformer 7 through a diode 17. The device operates as follows. If the phases of the local signal and the track signal coincide, the generator 16, receiving power from the winding 3 of the track transformer 1, generates high-frequency oscillations whose amplitude is proportional to the amplitudes njrreBoro signal. The voltage high frequency Tbi through the isolation transformer 10 is supplied to the control electrodes of the trinistor 13 and 14, alternately opening them. When this happens, the capacitor 15 is charged with current coming from the windings 6 of the local transformer 4 and its discharge through the winding 8 of the isolating transformer 7. When such is applied, a signal appears at the terminals of the secondary winding 9 of the isolating transformer 7. the phase and ground signal phases differ by 180 °, the period during which the charge of the capacitor 15 occurs does not coincide with the period when the trinistors 13 and 14 open. As a result, the high-frequency signal on the winding 9 of the isolating transformer is absent and the relay 18 is de-energized. If the elements of the circuit of the charge and discharge circuit are damaged, the capacitor 15 is violated, which leads to the absence of a signal in the receiving relay 18. The use of trintores as switching elements gives the circuit relay properties, and the reliability of its operation changes as the input signal level j changes. Phase-sensitive shchevoy receiver, containing a track, local and isolation transformers, capacitor, generator, sub-. Keyed to track secondary winding; a transformer, and a receiving relay connected via a rectifier to the secondary winding of an isolation transformer, one output of the primary winding of which is connected to one capacitor terminal, the other output of which is connected to one output of the secondary winding of a local transformer, characterized in that with increasing reliability of operation, It is equipped with an isolation transformer, the secondary winding of which is provided with three outputs, and trinistors, the middle secondary of the secondary winding of the isolation transformer being connected the other output of the first winding of an insulating transformer, with a different output of the secondary ob- / coil of the local transformer and with the cathodes of the trinistors, the anodes of which are connected to the terminals of the capacitor, and the control electrodes respectively to the other two terminals of the secondary winding of the isolation transformer, the primary coil of which with generator outputs. Sources of information taken into account during the examination 1. USSR author's certificate N 652702 / cl. In 61 L 23/16, 1976.