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/CH4/EX4.11/Ex4_11.sce | 30 ++++++++++++++++++++++++++++++
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 create mode 100755 2642/CH4/EX4.11/Ex4_11.sce

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diff --git a/2642/CH4/EX4.11/Ex4_11.sce b/2642/CH4/EX4.11/Ex4_11.sce
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+// FUNDAMENTALS OF ELECTICAL MACHINES 
+// M.A.SALAM 
+// NAROSA PUBLISHING HOUSE 
+// SECOND EDITION
+
+// Chapter 4 : DIRECT CURRENT GENERATORS
+// Example : 4.11
+
+clc;clear; // clears the console and command history 
+
+// Given data
+P = 4             // number of poles
+I_L = 25          // generator delivering current in A
+V_t = 230         // generator terminal voltage in V
+R_a = 0.2         // armature resistance in ohm
+R_sh = 55         // shunt field resistance in ohm
+brush_drop = 1    // brush drop in V
+
+// caclulations 
+I_sh = V_t/R_sh              // shunt field current in A
+I_a = I_L+I_sh               // armature current in A
+E_g = V_t+I_a*R_a+brush_drop // induced voltage in V
+P_arm = E_g*I_a              // power generated in armature in W
+P_L = V_t*I_L                // power absorbed by load in W
+n = (P_L/P_arm)*100          // efficiency
+
+// display the result 
+disp("Example 4.11 solution");
+printf(" \n Induced voltage \n E_g = %.1f V \n", E_g );
+printf(" \n Efficiency \n n = %.1f percent \n", n );
-- 
cgit