·A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per pole is 2 × 10² wb. Calculate the torque developed by the armature and the useful torque in N.M when the current taken by the motor is 30A. The armature resistance is 0.12 Q and the field resistance is 125 N. The rotational losses is 62% of the constant losses.

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·A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors.
The flux per pole is 2 × 10² wb. Calculate the torque developed by the armature and the
useful torque in N.M when the current taken by the motor is 30A. The armature resistance
is 0.12 Q and the field resistance is 125 N. The rotational losses is 62% of the constant
losses.
Transcribed Image Text:·A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per pole is 2 × 10² wb. Calculate the torque developed by the armature and the useful torque in N.M when the current taken by the motor is 30A. The armature resistance is 0.12 Q and the field resistance is 125 N. The rotational losses is 62% of the constant losses.
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