From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 2642/CH7/EX7.6/Ex7_6.sce | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100755 2642/CH7/EX7.6/Ex7_6.sce

(limited to '2642/CH7/EX7.6')

diff --git a/2642/CH7/EX7.6/Ex7_6.sce b/2642/CH7/EX7.6/Ex7_6.sce
new file mode 100755
index 000000000..33417cc13
--- /dev/null
+++ b/2642/CH7/EX7.6/Ex7_6.sce
@@ -0,0 +1,33 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 
+// M.A.SALAM 
+// NAROSA PUBLISHING HOUSE 
+// SECOND EDITION
+
+// Chapter 7 : THREE-PHASE INDUCTION MOTOR
+// Example : 7.6
+
+clc;clear; // clears the console and command history 
+
+// Given data
+V_1 = 150              // supply voltage in V
+P = 4                  // number of poles
+f = 50                 // frequency in Hz
+Z_1 = 0.12+%i*0.16     // per phase standstill stator impedance in ohm
+Z_2 = 0.22+%i*0.28     // per phase standstill rotor impedance in ohm
+R_2 = real(Z_2)             // from Z_2
+
+// caclulations 
+Z_eq = Z_1+Z_2                           // equivalent impedance in ohm
+P_mech =  3*V_1^2/(2*(R_2+abs(Z_eq)))  // maximum mechanical power developed in W
+s_mp = R_2/(abs(Z_eq)+R_2)              // slip
+W_s = 2*%pi*2*f/P                       // since N_s = f/(P/2) and W_s = 2*%pi*N_s
+W = (1-s_mp)*W_s                        // speed of rotor in rad/s
+T_mxm = P_mech/W                        // miximum torque in N-m 
+
+// display the result 
+disp("Example 7.6 solution");
+printf(" \n maximum mechanical power developed \n P_mech = %.f W \n", P_mech);
+printf(" \n Maximum torque \n T_mxm = %.3f N-m \n", T_mxm);
+printf(" \n Maximum slip \n s_mp = %.2f \n", s_mp);
+printf(" \n NOTE : Error in calculation of P_mech and T_mxm ");
+
-- 
cgit