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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2642/CH7/EX7.6 | |
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initial commit / add all books
Diffstat (limited to '2642/CH7/EX7.6')
| -rwxr-xr-x | 2642/CH7/EX7.6/Ex7_6.sce | 33 |
1 files changed, 33 insertions, 0 deletions
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 ");
+
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