$4\mathrm{.}3$ PRELAB

A $\backslash (100-\backslash$mathrm$\{$kW$\}250-\backslash$mathrm$\{$V$\}400-\backslash$mathrm$\{$A$\}\backslash )$ long$-$shunt compound generator has armature resistance of $\backslash (0\mathrm{.}025\backslash$Omega $\backslash ),$ a series filed resistance of $\backslash (0\mathrm{.}005\backslash$Omega $\backslash )$ and magnetization curve of Fig. $4.$ There are $1000$ shunt$-$field turns per pole and $5$ seriesfield turns per pole. The series field is connected in such a fashion that positive armature current produces directaxis mmf which adds to that of the shunt field. Compute the terminal voltage at rated current output when the shunt$-$field current is $4$ A and the shaft speed is $1100$ rpm $.$ Neglect the armature reaction.

Figure $4.$ Magnetization curve at $1200$ rpm