From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 380/CH4/EX4.3/Ex4_3.sce | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 380/CH4/EX4.3/Ex4_3.sce

(limited to '380/CH4/EX4.3/Ex4_3.sce')

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
-- 
cgit