Question 4.39: A four-pole shunt generator with lap connected armature has ...

Electrical Machines [EXP-707]

A four-pole shunt generator with lap connected armature has field and armature resistance of $50 \Omega$ and $0.1 \Omega$ respectively. The generator is supplying a load of 2.4 kW at 100 V . Calculate the armature current, current in each conductor and generated emf.

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\begin{array}{l}\text { Load current, } I_{L}=\frac{2.4 \times 1000}{100}=24 A\\\text { Shunt field current; } I_{s h}=\frac{V}{R_{s h}}=\frac{100}{50}=2 A\\\text { Armature current, } I_{a}=I_{L}+I_{s h}=24+2=26 A \\\text { Current in each conductor, } I_{c}=\frac{I_{a}}{A}=\frac{26}{6}= 4 . 3 3 A \\\begin{array}{l}\text { Generated emf, } E_{g}=V+I_{a} R_{a} \\=100+26 \times 0.1=102.6 V\end{array}\end{array}

4.39

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