Description :
UNIT 1 fundamentals of AC rotating machine
Contents
1.1 Introduction
1.2 Advantages
1.3 Parts of AC machines
1.4 Synchronous speed
1.5 AC winding
1.6 Winding factor (Coil pitch and distributed winding)
1.7 Distribution factor
1.8 EMF equation of alternator or generator
1.9 Numericals
1.10 Harmonic
1.11 Slot harmonics
1.12 Harmonics minimization
Answer : 1.2 Advantages: In practices most of alternator have rotating magnetic field type construction with stationary armature due to following reason. The generation level of AC voltage may be in the range ... at high speed. Only two Slip rings are required to excited the field by AC supply.