Exam Question
(a) What is the effect on the field flux of an alternator current in the synchronous motor that leads the terminal voltage? (6)
(b) A 1,000-KVA, 11,000-V, 3-ϕ, star-connected synchronous motor has an armature resistance and reactance per phase of 3.5 Ω and 40 Ω respectively. Determine the inducted e.m.f. and angular retardation of the rotor when fully loaded at (10)
(a) Unity p.f.
(b) 0.8 p.f. lagging
(c) 0.8 p.f. leading