A 12 kW, 100V, 1000 rpm dc shunt generator has an armature resistance of Ra = 0.1 ?, shunt field winding resistance Rfw = 80 ? and Nf = 1200 turns per pole. The rated field current is 1A. The machine is operating as separately excited dc generator at 1000 rpm with rated field current. Determine; a) the maximum value of the generated voltage b) the value of the field circuit control resistance (Rfc) required to generate rated terminal voltage c) the critical field circuit resistance (hint: first draw a straight line to pass through the linear portion of the magnetization curve)
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1 Ω - Shunt field winding resistance (Rfw) = 80 Ω - Number of turns per pole (Nf) = 1200 - Rated field current (If) = 1 A We need to find: a) The maximum value of the generated voltage (Eg_max) b) The value of the field circuit control resistance (Rfc) required to Show more…
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