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Diffstat (limited to '3811/CH11/EX11.6/Ex11_6.sce')
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1 files changed, 22 insertions, 0 deletions
diff --git a/3811/CH11/EX11.6/Ex11_6.sce b/3811/CH11/EX11.6/Ex11_6.sce new file mode 100644 index 000000000..321bd541b --- /dev/null +++ b/3811/CH11/EX11.6/Ex11_6.sce @@ -0,0 +1,22 @@ +//Book Name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
+//chapter 11
+//example 11.6
+//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
+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
+K=1.196;
+rps=ns/60;
+omegas=(2*%pi*rps);
+Tmax=V^(2)/(2*omegas*(R1+sqrt(R1^(2)+X1^(2))));
+tau=(J*omegas)/Tmax;
+smax=R2/sqrt(R1^(2)+X1^(2));
+tst=(tau/K)*((0.25/smax)+(1.95*smax)+smax);
+mprintf("The starting time of the motor at no load and full voltage and frequency is %f sec",tst)
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