A 240-V, 900-rpm, dc series motor takes 25 A at full load and rated speed. The armature and field-winding resistances ar
Posted: Fri May 20, 2022 11:50 pm
A 240-V, 900-rpm, dc series motor takes 25 A at full load and
rated speed. The armature and field-winding resistances are 0.2 Ohm
and 0.3 Ohm, respectively. The rotational loss is 300 W and assumed
to be constant. Calculate:
(a) the back e.m.f,
(b) the power output
(c) the output torque
(d) the copper loss
(e) the efficiency
(f) if the motor is driving a load with a torque 46 N.m at a
speed of 800 rpm, what is the motor current?
rated speed. The armature and field-winding resistances are 0.2 Ohm
and 0.3 Ohm, respectively. The rotational loss is 300 W and assumed
to be constant. Calculate:
(a) the back e.m.f,
(b) the power output
(c) the output torque
(d) the copper loss
(e) the efficiency
(f) if the motor is driving a load with a torque 46 N.m at a
speed of 800 rpm, what is the motor current?