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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 /695/CH3/EX3.12/Ex3_12.txt | |
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initial commit / add all books
Diffstat (limited to '695/CH3/EX3.12/Ex3_12.txt')
| -rwxr-xr-x | 695/CH3/EX3.12/Ex3_12.txt | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/695/CH3/EX3.12/Ex3_12.txt b/695/CH3/EX3.12/Ex3_12.txt new file mode 100755 index 000000000..14bd0e346 --- /dev/null +++ b/695/CH3/EX3.12/Ex3_12.txt @@ -0,0 +1,33 @@ +//Caption:Calculate (a)Efficiency of transformer (b)Load KVA at which max efficiency occurs and max efficiency (c)voltage regulation
+//Exa:3.12
+clc;
+clear;
+close;
+V1=2000;//in volts
+pf=0.8;
+I1=10000/V1;//in amperes
+P_iron=60;//in watts
+V_sc=40;//in volts
+I_sc=4;//in amperes
+a=2000/200;
+P_sc=70;//in watts
+Z_O1=V_sc/I_sc;
+R_O1=P_sc/I_sc^2;
+X_O1=sqrt(Z_O1^2-R_O1^2);
+R_O2=R_O1/a^2;
+X_O2=X_O1/a^2;
+I2=I1*a/2;//At half load
+Del_V=I2*(R_O2*pf+X_O2*sqrt(1-pf^2));
+V2=200-Del_V;
+P_o=V2*I2*pf;//in watts
+P_cu=(2.5/4)^2*P_sc;//At half load
+Eff=0.5*P_o/(0.5*P_o+P_iron+P_cu);
+disp(Eff*100,'(a)Efficiency (in %)=');
+I_1=sqrt(P_iron/R_O1);
+KVA_Load=10*I_1/5;
+disp(KVA_Load,'(b)Load KVA at which max efficiency occurs=');
+Eff_max=P_o/(P_o+P_iron+P_iron);
+disp(Eff_max*100,' Max Efficiency (in %)=');
+I_2=50;//at full load
+VR=(I_2*(R_O2*pf-X_O2*sqrt(1-pf^2)))/200;
+disp(VR*100,'(c)Voltage Regulation (in %)=')
\ No newline at end of file |