Q9-A 250 V d.c. Shunt motor has a shunt field resistance of 2502 and an armature resistance of 0.25 Q. For a given load, the motor runs 600 r.p.m drawing a current of 21A from the supply. If a resistance of 2502 is added in series with the field winding. Find the new armature current and the speed. Assume load torque constant and magnetization curve to be linear

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Q9-A 250 V d.c. Shunt motor has a shunt field resistance of 2502 and an armature
resistance of 0.25 2. For a given load, the motor runs 600 r.p.m drawing a current of
21A from the supply. If a resistance of 250 is added in series with the field
winding. Find the new armature current and the speed. Assume load torque constant
and magnetization curve to be linear
Transcribed Image Text:Q9-A 250 V d.c. Shunt motor has a shunt field resistance of 2502 and an armature resistance of 0.25 2. For a given load, the motor runs 600 r.p.m drawing a current of 21A from the supply. If a resistance of 250 is added in series with the field winding. Find the new armature current and the speed. Assume load torque constant and magnetization curve to be linear
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