Example 23. A 4 pole, 32 conductor, lap-wound d.c. shunt generator with terminal voltage of 200 volts delivering 12 amps to the load has Ra = 2 and field circuit resistance of 200 ohms. It is driven...

Extracted text: Example 23. A 4 pole, 32 conductor, lap-wound d.c. shunt generator with terminal voltage of 200 volts delivering 12 amps to the load has Ra = 2 and field circuit resistance of 200 ohms. It is driven at 1000 r.p.m. Calculate the flux per pole in the machine. If the machine has to be run as a motor with the same terminal voltage and drawing 5 amps from the mains, maintaining the same magnetic field, find the speed of the machine. 5 amp 12 amp 13 amp F1 44 amp A, F2 V1 amp F2 11 amp 200 V Supply 200 V A2 A2 Rh. Rh (b) Motor-action (a) Generator-action Fig. 23 Load