GATE 2023 Electrical Machines Evaluation Quiz 7

A 3-phase 4 pole alternator has 48 slots carrying the 3-phase distributed winding. Each coil of winding is short chorded by one slot pitch. The winding factor is given by

A 3-phase, 6 pole, 120 slots alternator has a coil span of 18 slots. The short pitch angle is___(in degree).

Which is the correct formula for calculation of pitch factor (K_P) in the synchronous machines?

A 3-ϕ 50 Hz, 8 pole, star connected alternator has 120 stator slots and each slot has 10 conductors. If the coil span is 12 slots, then the value of pitch factor will be-

For a 3-phase stator winding having 6 slots per pole per phase and coil span of 13 slot pitch, the value of pitch factor will be:

The armature of a star connected alternator is uniformly wound with T coils, each coil having N full pitched turns.The generated emf per conductor is 4V(rms). The line emf (in V) is-

Suppose in an induction motor, the synchronous speed is ‘a’. Due to 5^th space harmonic, the new synchronous speed is ‘b’, and due to 5^th time harmonic, the synchronous speed is ‘c’. What is the value of a:b:c ?