| 摘要 |
The invention provides higher efficiency signal transmission in a track circuit by minimizing the phase difference between the output voltage and output current of a transmitter and thereby minimizing reactive power and maximizing effective power. A track circuit 1T comprises a transmitter 1 for transmitting a train detection or train control signal to a connected rail 6 and a receiver 10, connected to a reception end of the rail 6, for receiving the signal from the transmission means 1. The transmission circuit comprises a phase adjustment means 2 which adjusts the phase difference between voltage and current of a train detection signal or a train control signal transmitted by the transmitter 1 so as to cause the phase difference to approach 0. The adjustment means may be a transformer 2, having a coil or a capacitor, or both of them added in parallel or in series having an inductance value and capacitance for causing the phase difference between voltage and current of the transmitted signal transmitted by the transmission means 1 to approach 0. A pseudo cable comprising a reactance, a resistor and a capacitor may also be used in conjunction with a transformer having a phase adjuster (Fig 6). |
