A separately excited DC generator has a no-load voltage of 127 V, \R_a = 0.02 \\Omega and \R_\sh = 15\\Omega Find the armature current when the generator terminal voltage is 120 V on load.

SSE JE Electrical Engineering 29 Oct 2020 Shift 2 Papers

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A separately excited DC generator has a no-load voltage of 127 V,

\R_a = 0.02 \Ω

and

\R_\sh = 15\Ω

Find the armature current when the generator terminal voltage is 120 V on load.

Solution:

\E _{ \g }=127 \V , \V _{ \t }=120 \V , \R _{ \a }=0.02 \Ω

\E _{ \g }= \V _{ \t }+ \I _{ \a } \R _{ \a }

127=120+ \I _{ \a } ×0.02

0.02 \I _{ \a }=7

\I _{ \a }= 3 5 0 \A

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