RAIL CIRCUIT Russian patent published in 2025 - IPC B61L1/18 B61L23/16 

FIELD: railway automation.

SUBSTANCE: rail circuit comprises a rail line, to both ends of which a generator and a track receiver are connected through a separating capacitor, which are tuned to resonance at the carrier frequency of the rail line control signal. To one of the ends of the rail line, limited by insulating joints, a track choke is connected, which is installed on the side of the rail line and is connected to the rails by means of choke jumpers of different length. Difference of larger and smaller values of inductance of semi-windings of track choke is equal to difference of inductances of long and short choke jumpers, measured at frequency of rail line control signal. At that, the long jumper connected to the far rail is connected to the output of the half-winding of the track choke with lower inductance, and the short jumper connected to the near rail is connected to the output of the half-winding of the track choke with higher inductance.

EFFECT: reduced variable component of traction current asymmetry and, as a result, significant increase in noise immunity and reliability of track control signal reception.

1 cl, 1 dwg