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  3. the following details are known about a 150 hp mot

The following details are known about a 150 hp motor, 240 V, 500 rpm, dc shunt...

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Electrical Engineering

The following details are known about a 150 hp motor, 240 V, 500rpm, dc shunt motor. Nominal full load current: 500 A Insulationclass: H Weight: 3400 kg

Find

1.The total losses and efficiency at full load.

2.Calculate the approximate shunt filed exciting current if theshunt field causes 20% of the total losses.

3.Calculate the value of the armature resistance knowing that50% of the total losses at full load are due to armatureresistance.

4.With your calculated armature resistance, determine thecounter-emf.

5.Determine the torque of the motor at full load.

6.The supply voltage is decreased to 200 V, approximate thespeed at this supplied voltage.

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