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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 11:41 pm
by answerhappygod
- A 240 V 900 Rpm Dc Series Motor Takes 25 A At Full Load And Rated Speed The Armature And Field Winding Resistances Ar 1 (36.44 KiB) Viewed 15 times
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?