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what's the Electrical control of mining locomotive?

2021-07-13 14:41
Electrical control of the mine locomotive is mainly to control the start, speed control, electrical braking and changing operation direction of the motor, operator operation.
    (1) start
   The start of the mine locomotive has two ways of serializing the resistance and using a controllable silicon DCD in the armature loop to change the average end voltage of the traction motor.
    Most of the start-up mode now uses the string resistor and gradually reduces the resistance value in the armature loop with the increase in the speed of the vehicle. On the locomotive equipped with two traction motors, two motors are taken in series to be connected in series to reduce energy consumption during startup.
    (2) speed control
    The method of speeding up is usually changed to the two traction motors to reduce the vehicle speed, or alternate the two motors, and in parallel to obtain different low-speed operations, no method for speeding with string resistance. The power-off inertia operation and the braking operation are also a way to speed up.
    (3) Electrical brake
    Electrical braking of the mine locomotive is energy consumption, so that the locomotive circuit is turned off to operate, so that the locomotive operates under the action of inertia, and the traction motor is connected to a power generation operation, so that the power consumption is in the circuit. In the resistance in the medium, the locomotive gradually decelerates.
    (4) Change the direction of operation
    The mine locomotive changes the direction of operation of the operating direction. The commutator on the controller is forward, backward and zero three gear.
    In addition to the control of the main circuit, the mine locomotive is controlled by the air compressor motor and the control of the lighting and the speaker. The newly designed locomotive host is indirectly controlled by the contactor to perform various operations, reducing the driver's operating strength, reducing maintenance, and improving the service life of the controller, and is convenient for parallel parallelism and implementing remote control.