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What role does the choke transformer play in railway signals?

2019-04-01 14:07:18

In the railway signal, the role of the choke transformer:

The choke transformeris installed at the connection between the traction return and the rail, and is used for conducting the traction current, or is installed in the upper and lower rail circuits to balance the traction current so as not to affect the normal operation of the track circuit.

 

 

The choke transformer belongs to a kind of iron core reactor. The magnetic circuit is a closed core with AC working winding and DC control winding. It uses the nonlinear characteristics of magnetic material under high magnetic density.

Changing the DC control current can change the saturation characteristics of the core and thus change the equivalent inductance of the AC side.

In the railway signal, the role of the turbulence transformer:

The choke transformer is installed at the connection between the traction return and the rail, and is used for conducting the traction current, or is installed in the upper and lower rail circuits to balance the traction current so as not to affect the normal operation of the track circuit.

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