TRACTION CURRENT HARMONIC NOISE COMPENSATOR Russian patent published in 2024 - IPC B61L25/06 B61L3/24 H04B15/00 

FIELD: electricity.

SUBSTANCE: invention relates to means of compensating for harmonic interference from traction current. Traction current noise compensator in a harmonic low-frequency signal of rail circuits or automatic locomotive signalling contains a rejection filter, made in the form of parallel connected inductance coils and a capacitor, three-winding transformer, two variable resistors, switch, inductance coil and capacitor. Input windings of the transformer are connected oppositely, and its output winding is connected to the signal receiver. At that, to the secondary winding of the isolating transformer of the rail circuit or the output of the receiving locomotive coils of the automatic locomotive signalling through one variable resistor one input winding of the transformer is connected, and the second input winding of the transformer is connected to them through a rejection filter and another variable resistor, which by the second end is connected to the input end of the switch, one output end of which is connected to the inductance coil, the second output end is connected to the capacitor connected by the other ends together.

EFFECT: higher noise immunity of track circuit operation and automatic locomotive signalling.

1 cl, 1 dwg