1 files changed, 24 insertions, 0 deletions
diff --git a/3811/CH11/EX11.7/Ex11_7.sce b/3811/CH11/EX11.7/Ex11_7.sce
new file mode 100644
index 000000000..cc907d097
--- /dev/null
+++ b/3811/CH11/EX11.7/Ex11_7.sce
@@ -0,0 +1,24 @@
+//Book Name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
+//chapter 11
+//example 11.7
+//edition 1
+//publishing place:Thomson Learning
+clc;
+clear;
+V=480;//terminal voltage in volt
+n=1120;//related full load speed of the motor in rpm
+R1=1;//stator resistance in ohm
+R2=1;//rotor resistance referred to stator in ohm
+Radd=1;//starting resistance inserted in the rotor circuit in ohm
+X1=5;//equivalent winding resistance in ohm
+J=4;//inertia of the motor in NM sec^2
+ns=1200;//nearest synchronous speed of the motor in rpm
+rps=ns/60;
+omegas=(2*%pi*rps);
+smax=(R2+Radd)/sqrt(R1^(2)+X1^(2));
+K=1.392;
+Tmax=V^(2)/(2*omegas*(R1+sqrt(R1^(2)+X1^(2))));
+tau=(J*omegas)/Tmax;
+tst=(tau/K)*((0.25/smax)+(1.95*smax)+smax);
+mprintf("The starting time of the induction machine is %f sec",tst)
+