The motor is used in a drilling operation. When the armature voltage of the loaded motor is 200 V, the motor speed is 500 rpm. Calculate the following:
A dc, separately excited motor has the following ratings:
Armature voltage = 200 V
Field Constant (K?) = 3 Vs
Armature resistance = 1 ?
a. Armature current when the motor speed is 500 rpm
b. Load torque when the motor speed is 500 rpm
c. Motor speed when the armature voltage is reduced by 10%
d. Armature current at the condition described in (c)
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