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Diffstat (limited to '3811/CH9/EX9.6')
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| -rw-r--r-- | 3811/CH9/EX9.6/Ex9_6.sce | 21 |
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diff --git a/3811/CH9/EX9.6/Ex9_6.jpg b/3811/CH9/EX9.6/Ex9_6.jpg Binary files differnew file mode 100644 index 000000000..3b171eab9 --- /dev/null +++ b/3811/CH9/EX9.6/Ex9_6.jpg diff --git a/3811/CH9/EX9.6/Ex9_6.sce b/3811/CH9/EX9.6/Ex9_6.sce new file mode 100644 index 000000000..f3a19a7e3 --- /dev/null +++ b/3811/CH9/EX9.6/Ex9_6.sce @@ -0,0 +1,21 @@ +//Book name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
+//chapter 9
+//example 9.6
+//edition 1
+//publisher and place:Nelson Engineering
+clc;
+clear;
+Ra=1;//armature resistance in ohm
+KQ=3;//field constant
+V=480;//Terminal voltage in volts
+Tl=120;//load torque in Nm
+alpha=30;//triggering angle of SCR 1 and 2
+Vm=V*sqrt(2);
+Iave1=Tl/KQ;
+omega1=(((2*Vm)/%pi)*cosd(alpha)-(Iave1*Ra))/KQ;
+se=60;//seconds in one minute
+n1=(omega1*se)/(2*%pi);
+Ib=-3*Iave1;
+b1=-((KQ*omega1)-(3*Iave1))/((2*Vm)/%pi);
+alpha2=acosd(b1);
+mprintf("The triggering angle for scr 3 and 4 to reduce the minimum braking current in degree is %f",alpha2)
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