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// Examle 16.9
Vo=210; // Supply voltage
Il=195; // Full-load current
Po=Vo*Il; // O/p power
n=0.9; // Efficiency
Pin=Po/n; // I/p power
Tl=Pin-Po; // Total loss
Rsh=52.5; // Shunt field resistance
Ish=Vo/Rsh; // Shunt field current
Ia=Il+Ish; // Armeture Current (Ia)
Cl=Ish^2*Rsh; // Shunt field copper loss
Hl=710; // Stray losses
CL=Cl+Hl // Constant loss
Al=4550-CL; // Armature copper loss
Ra=Al/Ia^2; // Armature resistance
disp('Armature resistance = '+string(Ra)+' Ohms');
// ==> for maximum effciency (Ia^2*RA= Pc = 1550 )
Ia1=sqrt(CL/0.0757); // Armeture Current for maximum efficiency ==>{Ra=0.0757557 ,but here we have Ra=0.0757}
disp(' Armeture Current = '+string(Ia1)+' Amp');
IL=Ia1-Ish; // Load current
disp(' Load current (IL) = '+string(IL)+' Amp');
// p 642 16.9
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