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Browsing by Subject "spills"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Przemienniki częstotliwości w napędach jazdy gąsienicowych maszyn górniczych i węglowych przenośników taśmowych o regulowanej prędkości taśmy
    (2007) Kasztelewicz, Zbigniew; Reizer, Ryszard; Szymański, Jerzy; Świderski, Jerzy
    In the paper modern drive solutions of mobile conveyor belts, caterpillar excavators and spills for surface brown coal mine as well as control methods of systems are presented. In classic drive solutions DC motors were used. Nowadays DC motors are replaced by AC motors. AC motor drives are controlled by advanced frequency converters in which scalar and vector control strategies are implemented. Power electronic recuperation units are used for power saving. Recuperation units return electrical energy to the power grid when the induction motors work as generators. The solution of the multi-motor drive system is discussed on the basis of the biggest brown coal excavator in Poland.