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// Example 5.5
// Computation of minimum value of (a) Shaft speed (b) Rotor current referred
// to the stator
// Page No. 187
clc;
clear;
close;
// Given data
f=60; // Frequency in Hz
p=12; // Number of poles
nr=591.1; // Rated speed of machine
v=575; // Voltage rating of the machine
R2=0.055;
// (a) Shaft speed
ns=120*f/p; // Speed (r/min)
s1=(ns-nr)/ns; // Slip 1
s2=1.25*s1; // Slip 2
nr1=ns*(1-s2);
// (b) Rotor current referred to the stator
V=v/sqrt(3);
I2=V*s2/R2;
// Display result on command window
printf("\n Shaft speed = %0.0f r/min ",nr1);
printf("\n Rotor current referred to the stator = %0.0f A ",I2);
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