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A three phase synchronous motor of 60 Hz is observed to have a terminal voltage of 460 V Q 4 (line to line) and a terminal current of 120A at a power factor of 0.95 lagging. The field current under this operating condition is 47A .The machine synchronous reactance is 1.68 ohm. Assume armature resistance is negligible, Calculate (i) the generated voltage Ef in volts(i) Magnitude of the field armature reactance (ii) Electrical power output of the rotor.

A three phase synchronous motor of 60 Hz is observed to have a terminal voltage of 460 V Q 4 (line to line) and a terminal current of 120A at a power factor of 0.95 lagging. The field current under this operating condition is 47A .The machine synchronous reactance is 1.68 ohm. Assume armature resistance is negligible, Calculate (i) the generated voltage Ef in volts(i) Magnitude of the field armature reactance (ii) Electrical power output of the rotor.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Question number 4 *Decent handwriting pls*
Q 4 A three phase synchronous motor of 60 Hz is observed to have a terminal voltage of 46O V (line to line) and a terminal current of 120A at a power factor of 0.95 lagging. The field current under this operating condition is 47A .The machine synchronous reactance is 1.68 ohm. Assume armature resistance is negligible, Calculate (i) the generated voltage Ef in volts(ii) Magnitude of the field armature reactance (ii) Electrical power output of the rotor.
Transcribed Image Text:Q 4 A three phase synchronous motor of 60 Hz is observed to have a terminal voltage of 46O V (line to line) and a terminal current of 120A at a power factor of 0.95 lagging. The field current under this operating condition is 47A .The machine synchronous reactance is 1.68 ohm. Assume armature resistance is negligible, Calculate (i) the generated voltage Ef in volts(ii) Magnitude of the field armature reactance (ii) Electrical power output of the rotor.
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