Answer to Question #204103 in Other for Eve

Question

A 2000V, 100KW, 9000 rpm series connected DC motor has an armature resistance of 6Ω and a negligible field resistance.

(a) Determine the armature current at the rated load.

(b) Determine the copper loss at the rated load.

(c) Determine the mechanical loss knowing that the no-load armature current

is 7 A at a speed of 9000 rpm.

(d) Determine the full load mechanical torque delivered to the load at a speed

of 9000 rpm.

(e) Determine the efficiency of the motor.

Answer 1

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