Why is a starting resistor needed to bring a motor up to speed?

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Starting a shunt motor 

Why is a starting resistor needed to bring a motor up to speed?
Transcribed Image Text:Why is a starting resistor needed to bring a motor up to speed?
BL
Torque is proportional to speed; TL=BI'w
0.2287
DC_Motor
5 hp: 240V; 16.2 A; 1220rpm
TL.
Demux
Timer
m
la
3 step
At de
-A-
In
Out
Te
starter
Ideal Switch
Frlll
Motor Starter
T 240 V
10 kohm
Ef=240 V
Va
Va
Transcribed Image Text:BL Torque is proportional to speed; TL=BI'w 0.2287 DC_Motor 5 hp: 240V; 16.2 A; 1220rpm TL. Demux Timer m la 3 step At de -A- In Out Te starter Ideal Switch Frlll Motor Starter T 240 V 10 kohm Ef=240 V Va Va
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