A 440V, A-connected, 60HZ four-poles SM has an armature resistance of 0.222 and synchronous reactance of 32. When this motor is supplying 100hp at 0.8 PF leading, its P, osses=9.2kW. 1. Find I,, I,, and E. 2. Find efficiency at rated conditions. 3. Calculate the output torque of this motor at the rated conditions.

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O MESSENGER
now
Amr Kittaneh
..
A 440V, A-connected, 60HZ four-poles SM has an
armature resistance of 0.222 and synchronous
reactance of 32. When this motor is supplying
100hp at 0.8 PF leading, its P,
=9.2kW.
losses
1. Find I,, I, , and Ea.
2. Find efficiency at rated conditions.
3. Calculate the output torque of this motor at the rated
conditions.
4. If the flux is decreased by 10%, find the torque
angle, the armature current, and the PF.
Transcribed Image Text:O MESSENGER now Amr Kittaneh .. A 440V, A-connected, 60HZ four-poles SM has an armature resistance of 0.222 and synchronous reactance of 32. When this motor is supplying 100hp at 0.8 PF leading, its P, =9.2kW. losses 1. Find I,, I, , and Ea. 2. Find efficiency at rated conditions. 3. Calculate the output torque of this motor at the rated conditions. 4. If the flux is decreased by 10%, find the torque angle, the armature current, and the PF.
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