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Example 4A 50-hp, 250-V, 1200 r/min shunt dc motor has a rated armaturecurrent of 170 A and a rated field current of 5 A. When its rotor is blocked, an armaturevoltage of 10.2 V (exclusive of brushes) produces 170 A of current flow, and a field volt-age of 250 V produces a field current flow of 5 A. The brush voltage drop is assumed to be2 V. At no load with the terminal voltage equal to 240 V, the armature current is equal to13.2 A, the field current is 4.8 A, and the motor's speed is 1150 r/mi

SOLVED:A dc generator generates an emf of 520  V. It has 2,000 armature conductors, flux per pole of 0.013  Wb, speed of 1200 rpm and the armature winding has four parallel paths. Find the number of poles.

A dc generator generates an emf of 520  V. It has 2,000 armature conductors, flux per pole of 0.013  Wb, speed of 1200 rpm and the armature winding has four parallel paths. Find the number of poles.

SOLVED: A 4-pole, 10-kW; 250-V lap-wound series generator has 500 armature conductors. Brushes are given a lead of 80°. Calculate the demagnetization and cross-magnetization amp turns/pole. Also, calculate extra shunt field turns/pole to neutralize the demagnetization and the number of turns/pole of the compensating winding.

Tactical Eradication Function - Armature

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