3. Figure 2.20 shows a weight of 1000 kg being lifted up at a velocity of 1 m/sec by means of a motor running at 960 rpm and a winch having a diameter of 0.30 m. The inertia of the motor and the winch drum are 1.6 kg-m² and 3.2 kg-m² respecti- vely. Calculate the total load torque of the system referred to the motor shaft. 4. A horizontal conveyer belt moving at a uniform velocity of 1 m/sec. transports load at the rate of 50,000 kg/hour. The belt is 180 m long and is driven by a 960 rpm motor. Motor Winch Load Fig. 2.20. Drive system for Problem-2. Dynamics of Electrical Drives 31 a) Determine the equivalent rotational inertia at the motor shaft. b) Calculate the required braking torque at the motor shaft to stop the belt at a uniform rate in 10 secs.?

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3. Figure 2.20 shows a weight of 1000 kg being lifted up at a velocity of 1 m/sec by
means of a motor running at 960 rpm and a winch having a diameter of 0.30 m.
The inertia of the motor and the winch drum are 1.6 kg-m? and 3.2 kg-m² respecti-
vely. Calculate the total load torque of the system referred to the motor shaft.
4. A horizontal conveyer belt moving at a uniform velocity of 1 m/sec, transports
load at the rate of 50,000 kg/hour. The belt is 180 m long and is driven by_a 960
rpm motor.
Motor
Winch
Load
Fig. 2.20. Drive system for Problem-2.
Dynamics of Electrical Drives
31
(a) Determine the equivalent rotational inertia at the motor shaft.
(b) Calculate the required braking torque at the motor shaft to stop the belt at a
uniform rate in 10 secs.?
Transcribed Image Text:3. Figure 2.20 shows a weight of 1000 kg being lifted up at a velocity of 1 m/sec by means of a motor running at 960 rpm and a winch having a diameter of 0.30 m. The inertia of the motor and the winch drum are 1.6 kg-m? and 3.2 kg-m² respecti- vely. Calculate the total load torque of the system referred to the motor shaft. 4. A horizontal conveyer belt moving at a uniform velocity of 1 m/sec, transports load at the rate of 50,000 kg/hour. The belt is 180 m long and is driven by_a 960 rpm motor. Motor Winch Load Fig. 2.20. Drive system for Problem-2. Dynamics of Electrical Drives 31 (a) Determine the equivalent rotational inertia at the motor shaft. (b) Calculate the required braking torque at the motor shaft to stop the belt at a uniform rate in 10 secs.?
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