What conditions must b generator? The open-circuit char at 1200 rev/min, is: Terminal voltage (V) Field current (A) The field coil resista: field-regulating resistanc open circuit when run at voltage when the regula 800 rev/min.
What conditions must b generator? The open-circuit char at 1200 rev/min, is: Terminal voltage (V) Field current (A) The field coil resista: field-regulating resistanc open circuit when run at voltage when the regula 800 rev/min.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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KVL and KCL
KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.
Sign Convention
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Answer is :71 omh and
83 v
Transcribed Image Text:(1.C.1.L.C., U.2)(
8. What conditions must be fulfilled for the self-excitation of a d.c. shunt
generator?
The open-circuit characteristic of a shunt-excited d.c. machine, run
at 1200 rev/min, is:
Terminal voltage (V)
Field current (A)
103 114 122 127 135 141
0-2 0-4 0-6 0-8 1-0 1-2 1-6 2-0
47 85
The field coil resistance is 55 Q. Determine: (i) the value of the
field-regulating resistance to enable the machine to generate 120 V on
open circuit when run at 1200 rev/min; (ii) the value of the open-circuit
voltage when the regulator is set to 20 2 and the speed is reduced to
800 rev/min.
(U.E.I., 0.2)
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