25Hz phase-sensitive track circuit track voltage transformation isolation device

Abstract

The invention provides a 25Hz phase-sensitive track circuit track voltage transformation isolation device which comprises a first winding, a second winding, an iron core and an inductance coil, the first winding and the second winding serve as a primary side and a secondary side respectively and are arranged on the two sides of the iron core, and the inductance coil is connected to the second winding in series. The inductance coil is connected to the second winding on the secondary side in series, so that a coded frequency shift signal can be effectively isolated when a track circuit is superposed and coded, and safe and reliable work of receiving equipment of a 25Hz phase-sensitive track circuit is ensured. And meanwhile, the transformation ratio of the first winding on the primary side to the second winding on the secondary side can be set to be a non-adjustable fixed value, so that the phenomenon that the normal work of the 25Hz phase-sensitive track circuit is influenced by randomly adjusting the transformation ratio of the windings by field personnel is avoided.

Description

technical field [0001] The present application relates to the field of rail transportation, in particular to a track transformer isolation device for a 25Hz phase-sensitive track circuit. Background technique [0002] Track isolation transformer unit, also known as track transformer, is a kind of equipment in 25Hz phase-sensitive track circuit system. As a power transformer at the power transmitting end or a relay transformer at the power receiving end, its main function is voltage transformation and impedance transformation. In the use of 25Hz phase-sensitive track circuit, the transformation ratio of the relay transformer at the receiving end is fixed, and the maintenance personnel only adjust the output voltage of the transformer at the transmitting end to make the indoor receiving voltage of the receiving end fall below the minimum value given in the track circuit adjustment table. between the value and the maximum value. [0003] At present, the transformation ratio of...

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Problems solved by technology

[0003] At present, the transformation ratio of the track transformer at the receiving end of the 25Hz phase-sensitive track circuit is fixed and does not need to be adjusted, but field personnel often do not adjust the receiving end transformer at will according to the design regulations, which affects the working characteristics of the existing track circuit

In addition, the coded frequency-shift information cannot be effectively isolated from the track section where the coded signal is superimposed. After the coded frequency-shifted information enters the receiving equipment of the track circuit, it will seriously affect the normal operation of the receiving equipment, which will bring problems to the work of the track circuit. certain risk

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