Switch machine driving system with open-phase protection

Abstract

The invention discloses a switch machine driving system with open-phase protection, and belongs to the switch machine technology. A digital input unit is provided with input signals DO1 and DO2; a relay is controlled to be sucked up or closed by input signals DO1 and DO2; by controlling the input sequence of the input signals DO1 and DO2, a first output interface or a second output interface of a commutation circuit is enabled to output, and the actuation of a first electronic switch or a second electronic switch is controlled, so the commutation operation of the motor of a switch machine is realized; an input signal DO1 sequentially passes through the delay circuit and the reversing circuit, and an input signal DO2 sequentially passes through the delay self-locking circuit and the reversing circuit. According to the invention, the overcurrent condition is detected during locked-rotor and phase loss, the drive of the switch machine is cut off, an open-phase protector is not needed, and protection of phase loss, locked-rotor and the like can be realized on hardware. The method that the electronic switch is firstly disconnected and then connected compared with a relay node is ensured by adopting digital quantity delay, so that ignition arc of the relay node can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to the switch machine technology. Background technique [0002] The switch machine is the basic signaling equipment of the railway, which plays the role of switch position conversion and safety indication. Among them, AC switch machines such as: S700K, ZD(J)9, ZY(J), etc., have been widely used in relay interlocking at present. [0003] Taking S700-K as an example, the drive control circuit of the switch machine is composed of three parts: indoor control circuit, switch action circuit and switch display circuit. The interlocking control command is sent through the indoor control circuit and connected to the relay combination through the cable to realize the switch drive and indication detection of the relay, as well as the functions of phase failure and squeeze protection, but the phase failure protection needs to be equipped with a phase failure protector. [000...

AI Technical Summary

Problems solved by technology

[0004] The equipment constituting the relay interlocking turnout drive circuit is large in size and complex in wiring, so there are problems such as high production cost, large space occupation, and difficult maintenance, and the relay action is easy to catch fire, and there are problems such as relatively high requirements for equipment and use.

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