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// Example 4.5
// Computation of (a) Shaft speed (b) Mechanical power developed
// (c) Developed torque
// Page No. 152
clc;
clear;
close;
// Given data
Prcl=263; // Rotor copper loss
Pgap=14580; // Power input to the rotor
fs=60; // Frequency
p=4; // Number of poles
// (a) Shaft speed
s=Prcl/Pgap; // Slip
ns=120*fs/p; // Speed of stator
nr=ns*(1-s); // Speed of shaft
// (b) Mechanical power developed
Pmech=Pgap-Prcl; // Mechanical power developed
Pmechhp=Pmech/746; // Mechanical power developed in hp
//(c) Developed torque
TD=5252*Pmechhp/nr;
// Display result on command window
printf("\n Shaft speed = %0.1f r/min ",nr);
printf("\n Mechanical power developed in hp = %0.2f hp ",Pmechhp);
printf("\n Developed torque = %0.1f lb-ft ",TD);
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