A 10-HP, 110-V, 3-phase, Y-connected, 60 Hz, 4 pole induction motor has the following test data: No load: 110 V, 21 A, 650 W Blocked-rotor: 24 V, 51 A, 1040 W Stator resistance between terminals: 0.08 ohm The motor has wound rotor. Assume that both stator and rotor windings are wye-connected. a) If full voltage were applied to the stator with the rotor terminals short-circuited, how much starting current would the motor draw? b) If the ratio of transformation per phase of the motor is 2, with the rotor having the greater turns, how much resistance should be added to each phase of the rotor to limit the starting current of the motor to 75 A, when the voltage is applied to the stator?
A 10-HP, 110-V, 3-phase, Y-connected, 60 Hz, 4 pole induction motor has the following test data: No load: 110 V, 21 A, 650 W Blocked-rotor: 24 V, 51 A, 1040 W Stator resistance between terminals: 0.08 ohm The motor has wound rotor. Assume that both stator and rotor windings are wye-connected. a) If full voltage were applied to the stator with the rotor terminals short-circuited, how much starting current would the motor draw? b) If the ratio of transformation per phase of the motor is 2, with the rotor having the greater turns, how much resistance should be added to each phase of the rotor to limit the starting current of the motor to 75 A, when the voltage is applied to the stator?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Question
A 10-HP, 110-V, 3-phase, Y-connected, 60 Hz, 4 pole induction
motor has the following test data: No load: 110 V, 21 A, 650 W
Blocked-rotor: 24 V, 51 A, 1040 W
Stator resistance between terminals: 0.08 ohm
The motor has wound rotor. Assume that both stator and rotor windings are
wye-connected.
a) If full voltage were applied to the stator with the
rotor terminals short-circuited, how much starting current would the
motor draw?
b) If the ratio of transformation per phase of the motor is
2, with the rotor having the greater turns, how much resistance should be
added to each phase of the rotor to limit the starting current of the
motor to 75 A, when the voltage is applied to the stator?
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