The Efficiency of Elevator Hoistway Equipment

Drive motors and their associated frequency converters can be more accurately sized if they are chosen, by calculation, to be closer the effective actual load values for the system. The very imprecise assumptions made in practice are often compensated for by choosing motors and drive control systems with large diversity factors. In keeping with current technological developments, the individual losses in the hoistway equipment (pulleys, bearings, guide shoes, ropes, etc) should be determined more accurately for various payloads (other than the rated load and for all operating conditions (starting reaching rated speed, braking, stopping, etc. – in both directions.