From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

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 1445/CH10/EX10.12/ch10_ex_12.sce | 43 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
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+//CHAPTER 10- THREE-PHASE INDUCTION MACHINES
+//Example 12
+
+disp("CHAPTER 10");
+disp("EXAMPLE 12");
+
+//VARIABLE INITIALIZATION
+v=440;                           //in Volts
+I=1200;                          //in Amperes
+eff=0.85;                        //full load efficiency
+pow_fact=0.8;                    //full load power factor
+
+//SOLUTION
+
+//solution (a)
+I_fl1=I/5;                       //starting current at rated voltage is 5 times the rated full-load current
+p1=sqrt(3)*v*I_fl1*pow_fact*eff;
+disp(sprintf("(a) The maximum rating when the motor starts at full voltage is %f kW",p1/1000));
+
+//solution (b)
+I_fl2=I/((0.8^2)*5); 
+p2=sqrt(3)*v*I_fl2*pow_fact*eff;
+disp(sprintf("(b) The maximum rating when the motor is used with an auto-transformer is %f kW",p2/1000));
+
+//solution (c)
+I_fl3=I/((0.578^2)*5);   
+p3=sqrt(3)*v*I_fl3*pow_fact*eff;
+disp(sprintf("(c) The maximum rating when the motor is used with star-delta starter  is %f kW",p3/1000));
+
+//The answers are slightly different due to precision of floating point numbers
+
+//END
+
+
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-- 
cgit