Ground rail tram control system

Abstract

A ground rail tram control system comprises a ground rail, a tram, a drive motor, a power supply circuit, a power control circuit, a flat vehicle power supply circuit and a flat vehicle control circuit. The power supply circuit is connected between commercial power and the ground rail, the power control circuit is connected to the power supply circuit in parallel, an overcurrent relay is arrangedin the power control circuit, a normally-closed contact of the overcurrent relay is connected with the power supply circuit in series, a coil of the overcurrent relay is further connected with the low-voltage output end of a step-down transformer in series, the flat vehicle power supply circuit is connected between the ground rail and the drive motor, and the flat vehicle control circuit is connected to the flat vehicle power supply circuit in front of the drive motor in parallel. By the adoption of the control system, an overcurrent protection device is erected on the low-voltage side of thestep-down transformer of the ground rail where the tram runs, the situation that the transformer is burnt out due to overcurrent is avoided, so that the maintenance cost of equipment is reduced, and the situation that production efficiency is low due to equipment faults is avoided as well.

Description

Technical field [0001] The invention relates to the technical field of tram control, in particular to a tram control system. Background technique [0002] Electric rail-type transfer flat car is a kind of transfer equipment often used by industrial and mining enterprises. The flat car uses a step-down transformer to change the three-phase 380V high voltage into a three-phase 36V low voltage, pass through the flat car track, and then enter the step-up transformer on the flat car through the slider to convert the three-phase 36V low voltage into a three-phase 380V high voltage, Supply power to the flat car motor to realize the operation control of the flat car. [0003] Because the low-voltage running track of the flat car is flat on the ground, and the production workshop environment of industrial and mining enterprises is harsh, metal foreign objects or even the product itself are often stuck or pressed on the low-voltage running track of the flat car, resulting in low-voltage cir...

AI Technical Summary

Problems solved by technology

[0003] Because the low-voltage running track of the flat car is laid flat on the ground, and the production workshop environment of industrial and mining enterprises is harsh, there are often metal foreign objects or even the product itself stuck or pressed on the low-voltage running track of the flat car, resulting in low-voltage circuits. Short circuit, causing the low-voltage side of the step-down transformer to be burned out by excessive short-circuit current, which not only affects normal production, but also increases the maintenance cost of the equipment

Images