The improvement of work safety and the functionality increase of operating the mine shaft hoist at the Tauron Wydobycie S.A. Z.G. Sobieski

The article presents information on changes to the mine shaft hoist in the cage compartment of the “Sobieski III” shaft of Tauron Wydobycie S.A. A separate control unit based on MENTOR thyristor converters was installed in the excitation system of the drive motor and control generators, which allowed the replacement of systems that were difficult to operate, e.g. electromechanical amplifier (amplidyne) and the machine exciter of the hoist motor. Additionally, in order to stabilize the speed (especially during revision works in the shaft), the system of setting speed levels of the hoisting machine has been modified. Speed adjustment is realized by a follow-up speed control system built on the basis of a digitally controlled MENTOR reverse converter.