Question: A two-pole, 60-Hz three-phase laboratory-size synchronous generator has a rotor radius of 5.71 cm, a rotor length of 18.0 cm, and an air-gap length of

A two-pole, 60-Hz three-phase laboratory-size synchronous generator has a rotor radius of 5.71 cm, a rotor length of 18.0 cm, and an air-gap length of 0.25 mm. The rotor field winding consists of 264 turns with a winding factor of kr = 0.95. The Y-connected armature winding consists of 45 turns per phase with a winding factor kw = 0.93.

a. Calculate the flux per pole and peak fundamental air-gap flux density which will result in an open-circuit, 60-Hz armature voltage of 120V rms/phase (line-to-neutral)

b. Calculate the dc field current required achieving the operating condition of part (a).

c. Calculate the peak value of the field-winding to armature-phase-winding mutual inductance.

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