Turnout control circuit for AC switch machine

Abstract

The invention discloses a turnout control circuit for an AC switch machine. The turnout control circuit is characterized by comprising a starting circuit, an actuating circuit and an indication circuit, wherein the starting circuit comprises a first turnout starting relay 1DQJ, a second turnout starting relay 2DQJ and a first turnout starting relay repeating relay 1DQJF; when the turnout control circuit is used for the occasion that a turnout positioning control relay DCJ or a reverse position control relay FCJ is sucked up. The first turnout starting relay 1DQJ is subjected to excitation suction, and the second turnout starting relay 2DQJ achieves pole switching; the actuating circuit is used for delivering a 380 V AC power source to the outdoor turnout AC switch machine according to theexcitation suction conditions of the first turnout starting relay 1DQJ, the first turnout starting relay repeating relay 1DQJF and the second turnout starting relay 2DQJ in the starting circuit to enable the 380 V AC power source to drive a turnout to be switched to a reverse position or to be positioned, and then the 380 V AC power source is disconnected; the indication circuit comprises a safetypolar-biased relay DBJ and a safety polar-biased relay FBJ, independently indicates a transformer BD1-7, a rectifying element, a 4[mu]f capacitor, and is used for reflecting the position of the turnout to a signal building; and the actuating circuit and the indication circuit are independent of each other.

Description

Technical field [0001] The invention relates to the field of rail transit signal control, and in particular to an AC switch machine switch control circuit. Background technique [0002] The switch machine is the actuator of the switch control system. It is used to switch the locked switch switch rails or center rails and supervise the position and status of the switch switch rails or center rails in the interlocking area. Among them, the AC switch machine uses 380V AC power supply and the motor is a three-phase asynchronous motor. It is currently used more and more in high-speed railways, passenger dedicated lines, subways, etc. [0003] The current common AC switch machine switch control circuit is a five-wire system. In practice, it was found that when this circuit is switching switches, there is a problem that the second starting relay 2DQJ is powered off and arced when the pole is reversed, resulting in the use of this circuit in subway lines. At this time, due to the...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a switch control circuit for an AC point machine, which solves the problem that the existing five-wire system AC point machine switch control circuit exists when the second starting relay 2DQJ is charged and disconnected when the switch is switched. Improve the reliability of the AC switch machine turnout control system to solve the problem of overall system reliability decline

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