Overhead Electric Locomotive

7T and 10T electric locomotives are divided into four types: primary transmission ordinary type, wall plate thickening type, secondary transmission ordinary type and dual-motor traction. Its voltage is 250V and 550V, and there are three kinds of speed regulation methods: resistance, IGBT chopping speed regulation and frequency conversion speed regulation.

The two-motor traction locomotive adopts contact resistance speed control or non-touch, point frequency conversion speed control, and the microcomputer and the synchronous control cable implement the two-machine synchronous control. Equipped with mechanical brake, electric brake and air brake, the traction force is large, the speed is high, and the braking effect is good.

7T and 10T electric locomotives are divided into four types: primary transmission ordinary type, wall plate thickening type, secondary transmission ordinary type and dual-motor traction. , Its voltage is 250V and 550V, and there are three kinds of speed regulation methods: resistance, IGBT chopping speed regulation and frequency conversion speed regulation.

Functional characteristics of 7-ton, 10T overhead electric locomotive

7-ton, 10T overhead line electric locomotives. Electric locomotives are suitable for large mines. Features: short wheelbase, good body rigidity, good cushioning performance, low mechanical wear, stepless speed regulation, no arc on-off, high reliability, and low failure rate , Fast current protection and energy saving.

●The speed regulation method is frequency conversion speed regulation; it adopts AC frequency conversion motor traction, high, low maintenance cost, wide speed regulation range, simple and safe operation. The locomotive is equipped with three braking modes: mechanical, electrical and air.

Working principle of overhead electric locomotive

During the working process of overhead line electric locomotive, the high-voltage alternating current is reduced and rectified by the traction converter, and the positive pole is connected to the overhead line, and the negative pole is connected to the rail. The pantograph on the locomotive is in contact with the overhead line, and the current is introduced into the car, and then enters the traction motor through the air automatic switch, controller, and resistance box to drive the motor to run. The electric motor drives the wheels to rotate through the transmission device, thereby pulling the train to travel. The current from the motor flows back to the converter through the track.

The choice and advantages and disadvantages of 7-ton overhead electric locomotives

The overhead line electric locomotive is the electric current transmitted from the traction converter to the overhead line through the receiver enters the electric locomotive circuit and the electric locomotive, and then returns to the converter through the track. There are two types of DC voltages for underground grids in my country: 250V and 550V, and there are two types of 550V and 750V in the open air. Advantages: The overhead electric locomotive has simple structure, low cost, convenient maintenance, large transportation capacity, high speed, high electricity efficiency, low transportation cost, and the most widely used locomotive.

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