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// Motor parameters at a load power factor
clc;
clear;
p=4;
f=50;
V=400;
pf=0.8;
Nr=1440;
Pm=20*(10^3); // Mechanical Power Developed
Ns=120*f/p;
s=(Ns-Nr)/Ns;
rf=s*f; // Rotor frequency
Pstat=1000; //Stator Loss
// Power input to the rotor = Mechanical Power Developed / (1-s)
Pirot=Pm/(1-s); // Rotor Power Input
Pi=Pirot+Pstat; // Power input to stator
Il=Pi/(sqrt(3)*V*pf); // Line Current
printf('For a 4 pole motor running at 1440 rpm and 0.8 p.f \n')
printf('i) Rotor Current frequency = %g Hz \n',rf)
printf('ii) Total input if stator loss is 1000W = %g kW \n',Pi/1000)
printf('iii) The line current = %g A \n',Il)
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