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

---
 503/CH3/EX3.2/ch3_2.sci | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100755 503/CH3/EX3.2/ch3_2.sci

(limited to '503/CH3/EX3.2/ch3_2.sci')

diff --git a/503/CH3/EX3.2/ch3_2.sci b/503/CH3/EX3.2/ch3_2.sci
new file mode 100755
index 000000000..f413549b9
--- /dev/null
+++ b/503/CH3/EX3.2/ch3_2.sci
@@ -0,0 +1,39 @@
+// To calculate no load current and its pf and no load power drawn from mains
+
+clc;
+E=200;
+f=50;
+N1=150;        // no of turns
+b1=.1;
+b2=.05;
+phi_max=E/(4.44*f*N1);
+disp(phi_max,'flux(Wb)');
+B_max=phi_max/(b1*b2);
+disp(B_max,'B_max(T)');
+
+H_max=250;        //According to B_max, H_max is 250AT/m
+l_c=.2*(3.0+3.5);    //length of core
+AT_max=H_max*l_c;
+disp(AT_max,'AT_max');
+T_max=N1;
+I_mmax=AT_max/T_max;
+I_mrms=I_mmax/2^.5;
+disp(I_mrms,'I_mrms(A)');
+
+v=2*(20*10*5)+2*(45*10*5);
+
+d=.0079;            //density of core material
+w=v*d;
+
+cl=3;                //core loss/kg
+closs=w*cl;
+disp(closs,'core loss(W)');
+I_i=closs/E;
+disp(I_i,'I_i(A)');
+function [r,pff]=rect2polar(x,y)
+    r=sqrt(x^2+y^2);
+    pff=cosd(atand(y/x));
+endfunction
+[I_o,pf]=rect2polar(I_i,-I_mmax);
+disp(I_o,'no load current(A)');
+disp(pf,'no load power factor');
\ No newline at end of file
-- 
cgit