bluestar_213
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- Oct 24, 2011
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A six-pole, lap-wound, 220 V, shunt-excited d.c.machine takes an armature current of 2.5 A when
unloaded at 950 r/min. When loaded, it takes an armature current of 54 A from the supply and runs
at 950 r/min. The resistance of the armature circuit is 0.18 ? and there are 1044 armature conductors. For the loaded condition, calculate: (a) the generated e.m.f.; (b) the useful flux per pole; (c) the useful torque developed by the machine in N m.
Please help to solve.
Thanks
unloaded at 950 r/min. When loaded, it takes an armature current of 54 A from the supply and runs
at 950 r/min. The resistance of the armature circuit is 0.18 ? and there are 1044 armature conductors. For the loaded condition, calculate: (a) the generated e.m.f.; (b) the useful flux per pole; (c) the useful torque developed by the machine in N m.
Please help to solve.
Thanks