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Diffstat (limited to '887/CH17/EX17.2/17_2.sce')
-rwxr-xr-x | 887/CH17/EX17.2/17_2.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/887/CH17/EX17.2/17_2.sce b/887/CH17/EX17.2/17_2.sce new file mode 100755 index 000000000..a7c1ed557 --- /dev/null +++ b/887/CH17/EX17.2/17_2.sce @@ -0,0 +1,23 @@ +clc
+//ex17.2
+s=1; //slip for starting
+V_L=440*complex(cos(0),sin(0));
+f=60;
+R_s=1.2;
+X_s=%i*2;
+X_m=%i*50;
+R_r_1=0.6;
+R_r_2=19.4;
+X_r=%i*0.8;
+Z_eq=X_m*(R_r_1+X_r)/(X_m+R_r_1+X_r); //equivalent impedance to the right in the figure in textbook
+Z_s=R_s+X_s+Z_eq;
+I_s=V_s/Z_s; //starting phase current
+[I_s_max,phi]=polar(I_s);
+I_L=sqrt(3)*I_s_max; //starting line current
+//I_L here is almost six times larger than in previous example. It is a typical characteristic of induction motors.
+P_ag=3*real(Z_eq)*I_s_max^2; //power crossing air gap
+W_s=2*%pi*(60);
+T_dev=P_ag/(W_s/2);
+printf(" All the values in the textbook are approximated hence the values in this code differ from those of Textbook")
+disp(I_L,'Starting line current')
+disp(T_dev,'Torque in Nm')
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