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+// Example 4.6
+// Determine (a) Power input (b) Total losses (c) Air gap power (d) Shaft speed
+// (e) Power factor (f) Combined windage, friction and stray load loss
+// (g) Shaft torque
+// Page No. 159
+
+clc;
+clear;
+close;
+
+// Given data
+Pshaft=74600;                // Shaft power
+eeta=0.910;                  // Rated efficiency
+ns=1200;                     // Speed of stator
+Pcore=1697;                  // Power in core
+Pscl=2803;                   // Stator copper loss
+Prcl=1549;                   // Rotor copper loss
+fs=60;                       // Synchronous frequency
+p=6;                         // Number of poles
+Vline=230;                   // Line voltage
+Iline=248;                   // Line current
+
+// (a) Power input
+Pin=Pshaft/eeta;             // Parallel resistance
+
+// (b) Total losses
+Ploss=Pin-Pshaft;
+
+//(c) Air gap power
+Pgap=Pin-Pcore-Pscl;
+
+// (d) Shaft speed
+s=Prcl/Pgap;      // Parallel resistance
+ns=120*fs/p;
+nr=ns*(1-s);
+
+// (e) Power factor
+Sin=sqrt(3)*Vline*Iline;
+FP=Pin/Sin;
+
+//(f) Combined windage, friction and stray load loss
+Closs=Ploss-Pcore-Pscl-Prcl;
+
+//(g) Shaft torque
+Tshaft=5252*100/nr;
+
+
+// Display result on command window
+printf("\n Power input = %0.0f W",Pin);
+printf("\n Total losses = %0.0f W",Ploss);
+printf("\n Air gap power = %0.0f W ",Pgap);
+printf("\n Shaft speed = %0.0f r/min ",nr);
+printf("\n Power factor = %0.2f ",FP);
+printf("\n Combined windage, friction and stray load loss = %0.0f W ",Closs);
+printf("\n Shaft torque = %0.1f lb-ft ",Tshaft);