1)A mechanical load is driven by an electric motor at an equilibrium speed Wa. The load...
1)A mechanical load is driven by an electric motor at an equilibrium speed Wa.
The load is Tl = 20+0.6w and the load moment of inertia is Jl= 2kgm^2
The speed-torque relation of the motor is w=100-0.1T and the moment of inertia
is Jm = 0.2 kgm^2.
a) Calculate the power requirement for Wc operation speed
b) Calculate the stopping time of the motor when its turned off at the
continuous operating W
c)Draw torque-speed characteristics of motor and load in the same graphic.
d)Comment on the stability of the operating system
Homework Answers
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1)A mechanical load is driven by an electric motor at an
equilibrium speed Wa.
The load...
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1. A 20 hp, 230 V, 60 Hz, four-pole, three-phase induction motor operating at rated load...
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1. A 20 hp, 230 V, 60 Hz, four-pole, three-phase induction motor operating at rated load has rotor copper loss of 331 W, and a combined friction, windage, and stray power loss of 249 W. Determine, (a) Mechanical power developed; (b) Air-gap power; (c) Shaft speed; (d) Shaft torque (10 pts.)
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