Drives use d-c motors with speed and direction of rotation determined by generators supplying power; acceleration and deceleration are smooth; there are fewer contact conductors to movable trolley; relatively slow landing speed for all loads is provided on first lowering point; there is less control maintenance; brake lining wear and brake wheel heating are reduced to minimum values; there is less wiring at time of installation; etc.
Adjustable-voltage hoist drives for cranes
Elec Eng
Electrical Engineering ; 75 , n 7
1956
2 pages
Aufsatz (Zeitschrift)
Englisch
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