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// Example 12.3
// Computation of (a) Induced emf at rated load (b) No load voltage
// (c) Voltage regulation (d) What is the type of compounding?
// Page No. 492
clc;
clear;
close;
// Given data
Pload=320000; // Shunt generator power rating
Vrated=250; // Shunt generator voltage rating
Rf=20.2; // Shunt resistance
Rrheo=7.70; // Shunt field rheostat value
If=8.96; // Field current
Iload=1280; // Load current
Ra=0.00817; // Armature resistance
Rip=0.00238; // Resistance of interpole winding
Rse=0.00109; // Resistance of series winding
Nf=502; // Turns per pole
VNL=225; // No load voltage
// (a) Induced emf at rated load
Iload=Pload/Vrated; // Load current
If=Vrated/(Rf+Rrheo); // Field current
Ia=If+Iload; // Armature current
Racir=Ra+Rip+Rse;
Ea=Vrated+Ia*Racir;
// (b) No load voltage
Ff=Nf*If;
// (c) Voltage regulation
VR=(VNL-Vrated)*100/Vrated;
// Display result on command window
printf("\n Induced emf at rated load = %0.1f V ",Ea);
printf("\n No load voltage = %0.0f V ",VNL);
printf("\n Voltage regulation = %0.0f Percent ",VR);
printf("\n The machine is overcompounded ");
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