Abstract
Aiming at the shortcomings of centralized control in the railway signalling system interiorly. This paper introduces a safety driving module of the DC switch machine, which utilizes the advanced power electronics technology based on the “Failure-Safety” principle and could reach SIL4 level. The module is directly installed in the trackside control cabinet. After receiving the control command of the control centre, the module could ensure safe and reliable operation trackside DC switch machine without relay. At the same time, the module solves the problem of current surge when the DC Switch Machine is starting operation. The module is running stable, strong practicability by experiment. It will play an important role in the distributed trackside control system.
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