sheave (drum) that has the elevator cage on one end and acounterweight on the other. The
sheave is of the radius r = 0.2 m and driven by a DC machinethrough a 1:10 step-down
gearbox. The empty cage has a mass of 125 kg and thecounterweight has a mass of 425 kg.
The DC machine has the parameters Ra = 0. 6 2 and k$ = 1.5 Nm/A.And controlled by
a PWM, 4-quadrant Chopper (H-bridge) in which, in turn, suppliedby a 150-V DC source.
The set-up is such that a counter-clockwise rotation of themachine corresponds to an upward
movement of the cage.
- Figure 1 Shows An Elevator System In Which A Cable Is Wound Around A Grooved Cylindrical Sheave Drum That Has The Elev 1 (50.02 KiB) Viewed 18 times
and the duty cycle required for an upward movement of the cagewith 9 (nine) 75-kg
passengers and at a constant speed of V = 0.8 m/s (Note: F = mg,where g ~
10 N/kg and m is the net mass). Show your work and list finalresults in Table 1
- Figure 1 Shows An Elevator System In Which A Cable Is Wound Around A Grooved Cylindrical Sheave Drum That Has The Elev 2 (9.17 KiB) Viewed 18 times
constant speed of V = 0.9 m/s. Show your work and list finalresults in Table 2.
- Figure 1 Shows An Elevator System In Which A Cable Is Wound Around A Grooved Cylindrical Sheave Drum That Has The Elev 3 (9.4 KiB) Viewed 18 times
constant speed of V = 0.9m/s. Show your work and list finalresults in table 3.
- Figure 1 Shows An Elevator System In Which A Cable Is Wound Around A Grooved Cylindrical Sheave Drum That Has The Elev 4 (9.6 KiB) Viewed 18 times
Table 1 ia (A) Va (V) d
Table 2 ia (A) Va (V) d
Table 3 ia (A) Va (V) d