problem 1: Illustrate the differences between salient pole and non salient pole synchronous machine.
problem 2: Derive the emf equation of alternator; describe the coil span factor, distribution factor and derive the expressions?
problem 3: A 3-phase, 8-pole, 750 rpm star – connected alternator has 72 slots on the armature. Each slot has 12 conductors and winding is short chorded by 2 slots. Find out the induced emf between lines, given the flux per pole is 0.06 wb.
a) What are the benefits and drawbacks of using short – pitched winding and distributed winding in alternator?
b) Derive the expression of coil span factor and distribution factor.
a) Describe the constructional details of synchronous machine.
b) Where salient pole rotors are favored.
problem 6: Compute the distribution factor for a 36-slot, 4-pole single layer 3-phase winding.