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A 200 V DC, 1,800 RPM shunt connected motor has an armature resistance of 0.4 ohm...

A 200 V DC, 1,800 RPM shunt connected motor has an armature resistance of 0.4 ohm and a brush resistance of 0.4 ohm; brush voltage drop of 6.0 V, independent of load. The resistance of the shunt field is 230 ohm. The full load rated line current is 40 A. When the motor is operated at no load the line current is 5 A and the speed is 1750 RPM.

Calculate speed at rated load

Calculate speed at .3 rated load.

Find power to coupling field at rated load

Find torque to mechanical load of motor at rated conditions

Find electrical power of motor at rated load

Find efficiency of motor at rated load

Find percent speed regulation of motor from no-load to full load

If the machine was driven by a generator, what speed must the shaft be turned to have 200 VDC at rated current 40A.

Find effeciency of generator at rated load

Find drive torque of generator at rated load.

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