COMPENSATOR FOR INTERFERENCE IN A HARMONIC LOW-FREQUENCY SIGNAL Russian patent published in 2021 - IPC B61L25/06 

FIELD: communication.

SUBSTANCE: invention relates to means of compensating for interference in a harmonic low-frequency signal of track circuits and ALSS. The compensator comprises a band elimination filter suppressing the signal voltage with a frequency of 25 and/or 75 Hz, an inverting transformer with a transformation coefficient of one, a summing three-winding transformer, the two primary windings whereof have an equal amount of coils and are connected accordingly. The secondary winding of the insulating transformer of the track circuit or the output of the receiving locomotive coils of the automatic locomotive signalling system therein are connected through a band elimination filter to the primary winding of the inverting transformer and to one primary winding of the summing transformer, the other primary winding whereof is connected to the secondary winding of the inverting transformer, and the secondary winding of the summing transformer is connected to the input of the signal receiver. The band elimination filter therein is made in the form of an inductivity coil and a capacitor connected in parallel.

EFFECT: increase in the interference resistance of signal receivers in track circuits and ALSS is achieved.

1 cl, 1 dwg