The open-circuit characteristic of a shunt generator when driven at normal speed is as follows : Field current : 0.5 1.0 1.5 2.0 2.5 3.0 3.5 A O.C. volts : 54 107 152 185 210 230 240 V The resistance of armature circuit is 0.1 Ω. Due to armature reaction the effective field current is given by the relation Ish (eff.) = Ish − 0.003 Ia. Find the shunt field circuit resistance that will give a terminal voltage of 220 V with normal speed (a) on open circuit (b) at a load current of 100 A. Also find (c) number of series turns for level compounding at 220 V with 100 A armature current ; take number of shunt turns per pole as 1200 and (d) No. of series turns for over-compounding giving a terminal voltage of 220 V at no-load and 230 V with 100 A armature current.
The open-circuit characteristic of a shunt generator when driven at normal speed is as follows : Field current : 0.5 1.0 1.5 2.0 2.5 3.0 3.5 A O.C. volts : 54 107 152 185 210 230 240 V The resistance of armature circuit is 0.1 Ω. Due to armature reaction the effective field current is given by the relation Ish (eff.) = Ish − 0.003 Ia. Find the shunt field circuit resistance that will give a terminal voltage of 220 V with normal speed (a) on open circuit (b) at a load current of 100 A. Also find (c) number of series turns for level compounding at 220 V with 100 A armature current ; take number of shunt turns per pole as 1200 and (d) No. of series turns for over-compounding giving a terminal voltage of 220 V at no-load and 230 V with 100 A armature current.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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The open-circuit characteristic of a shunt generator when driven at normal speed is as follows :
Field current : 0.5 1.0 1.5 2.0 2.5 3.0 3.5 A
O.C. volts : 54 107 152 185 210 230 240 V
The resistance of armature circuit is 0.1 Ω. Due to armature reaction the effective field current is given
by the relation Ish (eff.) = Ish − 0.003 Ia. Find the shunt field circuit resistance that will give a terminal voltage
of 220 V with normal speed (a) on open circuit (b) at a load current of 100 A. Also find (c) number of series
turns for level compounding at 220 V with 100 A armature current ; take number of shunt turns per pole as
1200 and (d) No. of series turns for over-compounding giving a terminal voltage of 220 V at no-load and
230 V with 100 A armature current.
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