Question

A 4-pole Dc wound machine is lap wound with 400 conductors. The pole shore is 20 cm long and average flux density over one-pole pitch is 0.4 T, the armature diameter being 30 cm. Here, motor is drawing 25 A current at 1500 rpm.

What is the available torque (N-m) at shaft?

a.

29.9

b.

59.8

c.

14.95

d.

44.85

Posted under DC Machines

Answer: (a).29.9

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Q. A 4-pole Dc wound machine is lap wound with 400 conductors. The pole shore is 20 cm long and average flux density over one-pole pitch is 0.4 T, the armature diameter being 30 cm....

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