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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /147/CH14/EX14.25/Example14_25.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '147/CH14/EX14.25/Example14_25.sce')
| -rw-r--r-- | 147/CH14/EX14.25/Example14_25.sce | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/147/CH14/EX14.25/Example14_25.sce b/147/CH14/EX14.25/Example14_25.sce new file mode 100644 index 000000000..d9159422d --- /dev/null +++ b/147/CH14/EX14.25/Example14_25.sce @@ -0,0 +1,53 @@ +close();
+clear;
+clc;
+V = 400; //V
+f = 60; //Hz
+p = 4;
+R1 = 0.2; //ohm
+X1 = 0.5; //ohm
+Xm = 20; //ohm
+X2_ = 0.2; //ohm
+R2_ = 4; //ohm
+loss = 800; //W
+n = 1755; //rpm
+
+ns = 120*f/p;
+s = (ns-n)/ns;
+Z = R1 + %i*X1 + (%i*Xm)*(R2_ + %i*X2_)/(R2_ + %i*(Xm+X2_));
+Zr = real(Z);
+Zi = imag(Z);
+Zarg = 180/%pi * atan(Zi/Zr);
+Z = sqrt(Zr^2 + Zi^2);
+
+//phase volatge 'Vp'
+Vp = V/sqrt(3); //V
+
+//(a)
+//input current 'I'
+I = Vp/Z;
+mprintf("(a) Input current, I = %0.2f A\n\n",I);
+
+//(b)
+//total input power 'Pi'
+Pi = sqrt(3)*I*cos(Zarg*%pi/180); //kW
+mprintf("(b) Input power, Pi = %0.2f kW\n\n",Pi);
+
+//(c)
+R = 3.77; //ohm
+Ps = 3*(I^2)*R; //kW
+//total power developed 'Pd'
+Pd = (1-s)*Ps; //kW
+//total output power 'Po'
+Po = Pd - loss;
+mprintf("(c) Output power, Po = %0.2f kW\n\n",Po/1000);
+
+//(d)
+w = 2*%pi*n/60;
+//output torque 'T'
+T = Po/w; //Nm
+mprintf("(d) Output torque, T = %0.1f N.m\n\n",T);
+//(e)
+//efficiency 'eff'
+eff = Po/(Pi*1000);
+mprintf("(e) Efficiency = %0.1f %%",eff*100);
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