A de shunt generator $(20$ kW$,200$ V$,1800$ rm$)$ has Ra $=0\mathrm{.}1$ S$,$ Rfw $=150$ S$.$ Assume that Ea $=$ V$,$

at no load. Data for the magnetization curve at $1800$ rpm are

$1.$ The machine is self$-$excited.

$($a$)$ Determine the maximum generated voltage.

$($b$)$ At full$-$load condition, V$,=$ V$,($rated$),/$a $=$ la $($rated$),$ If $=1\mathrm{.}25$ A$.$ Determine the value of

the field control resistance $($Ric$).$

$($c$)$ Determine the electromagnetic power and torque developed at full$-$load condition.

$2.$ The shunt generator is now connected as a long shunt compound generator.

$($a$)$ Show the generator connection.

$($b$)$ Determine the number of turns per pole of the series field winding required to make the no$-$

load and full$-$load terminal voltage V$,=200$ V$.$ Rsr $=0\mathrm{.}04$ S and Ng $=1200$ turns$/$pole$.$

$($Assume the effective field amperes due to armature effect is $0\mathrm{.}09$ A$)$