Assume that a 125 kW, 250 V long-shunt compound generator is driven at its rated speed of 1000 rpm. Its armature winding
Posted: Thu May 26, 2022 10:51 am
Assume that a 125 kW, 250 V long-shunt compound generator is
driven at its rated speed
of 1000 rpm. Its armature winding resistance, the series winding
resistance, and the shunt
winding resistance are given as 0.03, 0.01, and 35 2,
respectively. Its stray-load loss at
the rated voltage and speed is 1250 W. Its rated field current
is 4 A. If its rotational losses
are 1250 W. determine the following:
(a) The shunt-field copper loss
(b) The series-field copper loss?
(c) The total losses
(d) The percent efficiency of the machine
driven at its rated speed
of 1000 rpm. Its armature winding resistance, the series winding
resistance, and the shunt
winding resistance are given as 0.03, 0.01, and 35 2,
respectively. Its stray-load loss at
the rated voltage and speed is 1250 W. Its rated field current
is 4 A. If its rotational losses
are 1250 W. determine the following:
(a) The shunt-field copper loss
(b) The series-field copper loss?
(c) The total losses
(d) The percent efficiency of the machine