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

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 2642/CH3/EX3.5/Ex3_5.sce | 28 ++++++++++++++++++++++++++++
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 create mode 100755 2642/CH3/EX3.5/Ex3_5.sce

(limited to '2642/CH3/EX3.5')

diff --git a/2642/CH3/EX3.5/Ex3_5.sce b/2642/CH3/EX3.5/Ex3_5.sce
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+// FUNDAMENTALS OF ELECTICAL MACHINES 
+// M.A.SALAM 
+// NAROSA PUBLISHING HOUSE 
+// SECOND EDITION
+
+// Chapter 3 : TRANSFORMER AND PER UNIT SYSTEM
+// Example : 3.5
+clc;clear; // clears the console and command history 
+
+// Given data
+V_1 = 400      // primary voltage of transformer in V
+V_2 = 100      // secondary voltage of transformer in V
+I_0 = 0.4      // no-load current in A
+I_2 = 100      // load draws current in A
+cos_phi0 = 0.3 // power factor lagging from the supply
+cos_phi2 = 0.6 // power factor lagging from the secondary
+
+// caclulations 
+phi0 = acosd(0.3)
+phi2 = acosd(0.6)
+phi1 = phi0-phi2 
+a = V_1/V_2  // turn ratio
+I_2! = I_2/a // secondary current equivalent to the primary 
+I_1 = sqrt((I_2!^2)+(I_0^2)+(2*I_2!*I_0*cosd(19.4))) // primary current in A
+
+// display the result 
+disp("Example 3.5 solution");
+printf(" \n Primary current \n I_1 = %.2f A \n", I_1);
-- 
cgit