A 440-V, 60-Hz, 4-pole, Delta-connected, three-phase induction motor has the following parameters in ohms/phase referred
Posted: Fri May 20, 2022 11:56 pm
A 440-V, 60-Hz, 4-pole, Delta-connected, three-phase induction
motor has the following parameters in ohms/phase referred to the
stator circuit: R1 = 0.3 ohms, R2 = 0.6 ohms, X2 = 0.9 ohms, Rc =
150 ohms, Xm = 60 ohms. The rotational loss is 4% of the power
developed. If the motor runs at 4% slip, Determine:
a) rotor speed
b) stator current
c) power factor
d) efficiency
e) the slip at which the motor develops maximum torque
f) if the rotational losses are kept constant at 500 W, what is
the required rotor current to operate the motor at maximum
efficiency?
Rated power not given, is this not possible?
motor has the following parameters in ohms/phase referred to the
stator circuit: R1 = 0.3 ohms, R2 = 0.6 ohms, X2 = 0.9 ohms, Rc =
150 ohms, Xm = 60 ohms. The rotational loss is 4% of the power
developed. If the motor runs at 4% slip, Determine:
a) rotor speed
b) stator current
c) power factor
d) efficiency
e) the slip at which the motor develops maximum torque
f) if the rotational losses are kept constant at 500 W, what is
the required rotor current to operate the motor at maximum
efficiency?
Rated power not given, is this not possible?