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A special bridge crane : resulting from logistics requirements

Martinek P., Vrana V.

Maszyny Dźwigowo-Transportowe

2000

Nr 1

5-11

This article analyses material flows in large-stores of metallurgy material and it recommend newly arisen technical assets for logistic system. There are also described controlled drives of modern bridge crane. By means of special manipulating asset - KOMBI crane we can accomplish service operation shortening, in receiving into stock and at expedition to component clints. This crane can be realized e.g by reconstruction of elder bridge crane and its equiping by two crane trolleys. One crane trolley - stacking one, is provided by supporting girder with tilting forks and sheares stabilizer and second trolley - console one, moving along one main cross-beam of the same bridge crane, has supporting girder provided by load magnets. This combination allows non-slinger manipulation with long bar metallurgy material. Actuating and controlling of this manipulating asset is realized by remote control (from ground), thereby minimum one labour force is saved

W artykule przedstawiono analizę przepływu strumieni materiałowych w magazynie wyrobów hutniczych, w którym jego obsługa oparta jest o system logistyczny. Suwnica bramowa w tym systemie posiada sterowane komputerowo mechanizmy. System manipulacji i sterowania KOMBI umożliwia skrócenie czsu cykli pracy oraz ekspedycji ładunków. Suwnica bramowa powstała w efekcie modernizacji obecnej suwnicy i zastępuje dwie stare suwnice.

Negative effects of the frequency inverters and their elimination by output filters

Mikulanin P., Vrana V., Mach V.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

1998

z. 92

111--116

This paper deals with voltage reflections inside along cable between the frequency inverter and the induction motor, and at the same time their elimination by means of output filters.