Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
E.M.F. Equation of a Generator
Hence, according to Faraday's laws of electromagnetic induction, E.m.F. generated per conductor = PϕN/60 volts
E.M.F. EQUATION OF A GENERATOR Let P = number of poles, ϕ = flux/pole, webers (Wb), Z = total number of armature conductors, = number of slots × number of conductors / slot, N = rotational speed of armature, r.p.m, A = number of parallel paths in armature and E = generated e.m.f. per parallel path in armature. Average emf generated per conductor = dϕ/dt volt Now, flux cut per conductor in one revolution, dϕ = Pϕ Wb. Number of revolutions / second = N/60 ⸫ Time for one revolution, dt = 60/N seconds Hence, according to Faraday's laws of electromagnetic induction, E.m.F. generated per conductor = PϕN/60 volts For a lap wound generator: Number of parallel paths, A = P Number of conductor (in series) in one path = Z/P ⸫ E.m.f generator per path = For a wave wound generator : Number of parallel paths, A = P Number of conductor (in series) in one path = Z/2 ⸫ E.m.f generator per path = In general, generated e.m.f where A = P ... for lap winding = 2 ... for wave winding.
Basic Electrical and Electronics Engineering: Unit II: Electrical Machines : Tag: : - E.M.F. Equation of a Generator
Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
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