Monorail Conveyor
Flexible underground transport

In underground mining, the transportation of tools, ore and overburden is a necessity. One possible system for transporting these materials to the operation site and back again to the lift shaft is a monorail conveyor. They are put to use in many tunnels and are in the meantime preferred to the floor-mounted conveyor systems. Because overhead monorails in tunnels are not only more durable than the typical floor-mounted systems, they are also more flexible for underground uses as they can be shortened or lengthen by only two people in a very short space of time. As the coupling mechanism between the individual wagons is, however, non-rigid, special regulation of the entire system is required, particularly the drives that are distributed over the entire conveyor.


Functional description

The above mentioned regulation of the individual coupling elements with appropriate synchronization is achieved with the frequency inverter and the resulting master/slave mode. The load distribution of the different drives is set up by a speed regulator with matching static, so that on average all drives have equal load distribution. The constant change caused by the ascending and descending movement is controlled by the speedy cross communication of all engaged drives, preventing vibrations as a result. The resulting dissipated energy is fed back to the electricity network by the frequency inverter.


Power electronics from REFU

  • RPCS designed especially for mining with strengthened resistance to shocks and vibrations.
  • RPCS in special customer-specific housings

Supplemented by customer with

  • Motors (synchronous motor, asynchronous motor, sensor-equipped operation (torque at zero speed, reverse rolling lock))
  • Control system (PLC or PC with bus system)