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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1892/CH1/EX1.16 | |
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initial commit / add all books
Diffstat (limited to '1892/CH1/EX1.16')
| -rwxr-xr-x | 1892/CH1/EX1.16/Example1_16.sce | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/1892/CH1/EX1.16/Example1_16.sce b/1892/CH1/EX1.16/Example1_16.sce new file mode 100755 index 000000000..247adde09 --- /dev/null +++ b/1892/CH1/EX1.16/Example1_16.sce @@ -0,0 +1,43 @@ +// Example 1.16
+
+clear; clc; close;
+
+format('v',7);
+// Given data
+V=440;//in volt
+P=8;//no. of poles
+Pout=40;//in KW
+f=50;//in Hz
+phase=3;//no. of phase
+R1=0.1;//in ohm
+X1=0.4;//in ohm
+R2dash=0.15;//Equivalent rotor resistance in ohm
+X2dash=0.44;//Equivalent rotor reactance in ohm
+I0=20*expm(%i*-acos(0.09));//in Ampere
+N=727.5;//in rpm
+MechLoss=1000;//in watts
+CoreLoss=1250;//in watts
+
+//Calculations
+Ns=120*f/P;//in rpm
+S=(Ns-N)/Ns;//slip
+RLdash=R2dash*(1-S)/S
+V1=V/sqrt(3);//in volt
+R1e=R1+R2dash;//in ohm
+X1e=X1+X2dash;//in ohm
+I2rdash=V1/(R1e+RLdash+%i*X1e);//in Ampere
+I1bar=I0+I2rdash;//in Ampere
+InputCurrent=abs(I1bar);//in Ampere
+InputPF=cosd(atand(imag(I1bar),real(I1bar)));//
+disp(InputPF,InputCurrent,"(i) Input Current in Ampere & PF(lagging) are : ");
+T=3*abs(I2rdash)^2*R2dash/S/(2*%pi*Ns/60);//in N-m
+disp(T,"(ii) Torque Developed in N-m : ") ;
+P2=3*abs(I2rdash)^2*R2dash/S;//in Watts
+//Formula : P2:Pc:Pm=1:S:1-S
+Pm=(1-S)*P2;//in Watts
+TotPout=Pm-MechLoss;//in watts
+disp(TotPout,"(iii) Output power in Watts : ");
+TotCuLoss=3*abs(I2rdash)^2*R1e;//in watts
+Eff=TotPout/(TotPout+TotCuLoss+CoreLoss+MechLoss)*100;//in %
+disp(Eff,"(iv) Efficiency in % : ");
+
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