1. What measures are adopted to make the B-wave in a synchronous machine nearly sinusoidal? Why should the B-wave be sinusoidal?
2. A synchronous machine has P poles and generate voltage of frequency f Hz. Write the expressions for its speed in rad (elect.)/s, rad (mech)/s and rpm
3. Explain the terms, coil span, coil pitch, shortpitching and cording of coils.
4. What is SPP? Write the expressions for a stator having S slots and P poles.