Electric Machine; check image, all question there. The efficiency of 25 kW, 300 V round rotor synchronous motor is 75%. Since the motor circuit parameters are given as r=0.05Ω and X. =1.5 Ω, find the followings for motor with 75% load and cos(Ø) = 0.8 (end) in operation. a)Calculate the current drawn by the motor from the network b)Calculate the induced pole whell voltage (Ef)

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
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Chapter11: Transient Stability
Section: Chapter Questions
Problem 11.19P
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Electric Machine; check image, all question there.

The efficiency of 25 kW, 300 V round rotor synchronous motor is 75%. Since the motor circuit parameters are given as r=0.05Ω and X. =1.5 Ω, find the followings for motor with 75% load and cos(Ø) = 0.8 (end) in operation.

a)Calculate the current drawn by the motor from the network

b)Calculate the induced pole whell voltage (Ef)

Δν
L E,
E
Fig. Equivalent Circuit of Synchronous Machine
The efficiency of a 25 kW, 300 V round rotor synchronous motor is 75 %. Since the motor circuit parameters are given as T
0.05N and X, =1.52 find the followings for motor with 75 % load and
cos() = 0.8 (end) in operation.
a)Calculate the current drawn by the motor from the network
b)Calculate the Induced pole wheel voltage (Ef)
О а. Case a : 29.799 A
Case b: 105.54 < –10.6469° V
О. Саse a : 59.799 A
Case b: 207.504 < –10.6469° V
O. Case a: 59.899 A
Case b: 275.504 < -10.6469° V
O d. Case a : 29.799 A
Case b: 285.504 < -15.6469° V
O e. Case a : 60.1407 A
Case b: 136.249 < –31.0939° V
Transcribed Image Text:Δν L E, E Fig. Equivalent Circuit of Synchronous Machine The efficiency of a 25 kW, 300 V round rotor synchronous motor is 75 %. Since the motor circuit parameters are given as T 0.05N and X, =1.52 find the followings for motor with 75 % load and cos() = 0.8 (end) in operation. a)Calculate the current drawn by the motor from the network b)Calculate the Induced pole wheel voltage (Ef) О а. Case a : 29.799 A Case b: 105.54 < –10.6469° V О. Саse a : 59.799 A Case b: 207.504 < –10.6469° V O. Case a: 59.899 A Case b: 275.504 < -10.6469° V O d. Case a : 29.799 A Case b: 285.504 < -15.6469° V O e. Case a : 60.1407 A Case b: 136.249 < –31.0939° V
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