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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 /380/CH4/EX4.3/Ex4_3.sce | |
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initial commit / add all books
Diffstat (limited to '380/CH4/EX4.3/Ex4_3.sce')
| -rwxr-xr-x | 380/CH4/EX4.3/Ex4_3.sce | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/380/CH4/EX4.3/Ex4_3.sce b/380/CH4/EX4.3/Ex4_3.sce new file mode 100755 index 000000000..f358dc790 --- /dev/null +++ b/380/CH4/EX4.3/Ex4_3.sce @@ -0,0 +1,26 @@ +//Caption:Find the efficiency of transformer
+//Exa:4.3
+clc;
+clear;
+close;
+R_1=4;//in ohms
+R_2=0.04;//in ohms
+X_1=12;//in ohms
+X_2=0.12;//in ohms
+pf=0.866;//power factor
+V_p=2300;//primary voltage in volts
+V_s=230;//Secondary voltage in volts
+S=23000;//VA
+theta=acosd(pf);
+I_2=(S*0.75/V_s)*(cosd(theta)+%i*sind(theta));//secondary current (in Amperes)
+Z_2=R_2+%i*X_2;//secondary winding impedance (in ohms)
+E_2=V_s+I_2*Z_2;//induced emf in secondary winding (in Volts)
+a=V_p/V_s;//transformation ratio
+E_1=a*E_2;//induced emf in primary winding (in Volts)
+I_1=I_2/a;//current in primary winding
+Z_1=R_1+%i*X_1;//primary winding impedance (in ohms)
+V_1=E_1+I_1*Z_1;//source voltage
+P_o=real(V_s*conj(I_2));//output power(in Watts)
+P_in=real(V_1*conj(I_1));//input power
+Eff=P_o/P_in;
+disp(Eff*100,'Efficiency (%)=');
\ No newline at end of file |