A shunt connected, 82-KW 257-V de motor has an armature resistance of 52 milliohm and a field resistance of 192 ohm when operating at 257 V, Its no load speed is 1850 rpm. a. Motor is operating under load at the terminal voltage of 257 V and a terminal current is 297 amp, Find speed, load power, load torque

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A shunt connected, 82-KW 257-V de motor has an armature resistance of 52 milliohm and a
field resistance of 192 ohm when operating at 257 V, Its no load speed is 1850 rpm.
a. Motor is operating under load at the terminal voltage of 257 V and a terminal current is
297 amp, Find speed, load power, load torque
b. If torque is kept constant find speed if the terminal voltage is reduced to 207 V
Ea = wmKalf;
Transcribed Image Text:A shunt connected, 82-KW 257-V de motor has an armature resistance of 52 milliohm and a field resistance of 192 ohm when operating at 257 V, Its no load speed is 1850 rpm. a. Motor is operating under load at the terminal voltage of 257 V and a terminal current is 297 amp, Find speed, load power, load torque b. If torque is kept constant find speed if the terminal voltage is reduced to 207 V Ea = wmKalf;
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