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// Examle 16.20
V=230; // Supplt voltage
Ia1=40; // Armature currernt Ia1
Ra=0.2; // Armature resistance
Rse=0.1; // Series field resistance
E1=V-Ia1*(Ra+Rse); // Back emfat (24 A)
disp(' Back emfat (24 A) = '+string(E1)+' Voltage');
Ia2=20; // Armature currernt Ia2
E2=V-Ia2*(Ra+Rse); // Back emfat (20 A)
disp(' Back emfat (20 A) = '+string(E2)+' Voltage');
N1=1000; // Speed of a Motor at I= 40A
N2=(E2*N1)/(E1*0.6); // Speed of a Motor
disp(' Speed of a Motor = '+string(round(N2))+' rpm');
// p 654 16.20
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