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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 9: POLYPHASE INDUCTION (ASYNCHRONOUS) DYNAMOS
+// Example 9-5
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+P = 8 ; // Number of poles in the SCIM
+f = 60 ; // Frequency in Hz
+R_r = 0.3 ; // Rotor resistance per phase in ohm
+S_r = 650 ; // Speed in rpm at which motor stalls
+
+// Calculations
+// case a
+S = (120*f)/P ; // Speed in rpm of the rotating magnetic field
+s_b = (S - S_r)/S ; // Breakdown Slip
+
+// case b
+X_lr = R_r / s_b ; // Locked rotor reactance in ohm
+
+// case c
+f_r = s_b * f ; // Rotor frequency in Hz, at the maximum torque point 
+
+// case d
+s = 5*(1/100);//  Rated slip
+S_r = S * (1 - s); // Full-load in rpm speed at rated slip 
+
+// Display the results
+disp("Example 9-5 Solution : ");
+printf(" \n a: S = %d rpm \n    s_b = %.3f \n", S , s_b );
+
+printf(" \n b: X_b = %.2f ohm \n ", X_lr );
+
+printf(" \n c: f_r = %.1f Hz \n ", f_r );
+
+printf(" \n d: S = %d rpm \n ", S_r );
+