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authorprashantsinalkar2017-10-10 12:38:01 +0530
committerprashantsinalkar2017-10-10 12:38:01 +0530
commitf35ea80659b6a49d1bb2ce1d7d002583f3f40947 (patch)
treeeb72842d800ac1233e9d890e020eac5fd41b0b1b /1445/CH8/EX8.18/Ex8_18.sce
parent7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (diff)
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updated the code
Diffstat (limited to '1445/CH8/EX8.18/Ex8_18.sce')
-rw-r--r--1445/CH8/EX8.18/Ex8_18.sce16
1 files changed, 8 insertions, 8 deletions
diff --git a/1445/CH8/EX8.18/Ex8_18.sce b/1445/CH8/EX8.18/Ex8_18.sce
index 10b37b947..fb5a399e9 100644
--- a/1445/CH8/EX8.18/Ex8_18.sce
+++ b/1445/CH8/EX8.18/Ex8_18.sce
@@ -1,27 +1,27 @@
//CHAPTER 8- DIRECT CURRENT MACHINES
//Example 18
+clc;
disp("CHAPTER 8");
disp("EXAMPLE 18");
-//460 V 10 HP motor
//VARIABLE INITIALIZATION
v_t=460; //in Volts
p_o=10*736; //in Watts (1 metric H.P=735.5 W)
ratio=85/100; //as given in the question
-eff=84/100; // efficiency
+eff=84/100;
I_f=1.1; //in Amperes
r_a=0.2; //in Ohms
//SOLUTION
-p_i=p_o/eff; //power input
-I_l=p_i/v_t; //line current
-I_a=I_l-I_f; // armature current
-E1=v_t-(I_a*r_a); //back emf
+p_i=p_o/eff;
+I_l=p_i/v_t;
+I_a=I_l-I_f;
+E1=v_t-(I_a*r_a);
E2=E1*ratio; //E2:E1=N2:N1=ratio
v=v_t-E2; //voltage drop across r_a and r_s (r_s is the series resistance to be inserted)
-r_s=(v/I_a)-r_a; // series resistance
-disp(sprintf("The resistance required is %.2f Ω",r_s));
+r_s=(v/I_a)-r_a;
+disp(sprintf("The resistance required is %f Ω",r_s));
//The answer is different because ratio equals 85/100 and not 75/100