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

---
 3760/CH4/EX4.50/Ex4_50.sce | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 3760/CH4/EX4.50/Ex4_50.sce

(limited to '3760/CH4/EX4.50/Ex4_50.sce')

diff --git a/3760/CH4/EX4.50/Ex4_50.sce b/3760/CH4/EX4.50/Ex4_50.sce
new file mode 100644
index 000000000..3256f2ca3
--- /dev/null
+++ b/3760/CH4/EX4.50/Ex4_50.sce
@@ -0,0 +1,16 @@
+clc;
+v=250; // supply voltage
+i=50; // current drawn from supply
+ic=0.4; // percentage increase in speed
+T=1.2; // ratio of final and initial torque
+n=1.4;// ratio of final and initial speed
+ra=0.5; // armature resistance 
+Ea1=v-i*ra; // counter EMF at initial speed
+// ia2=(T2/T1)*ia1*k where k=f1/f2 and T1 is initial torque and T2 is final torque now writing Ea2(counter EMF at 1000rpm) in terms of k and finding value of k by solving quadratic equation in k whose  terms are
+t1=T*ra*i; 
+t2=-v;
+t3=n*Ea1;
+p=[ t1 t2 t3 ];
+k=roots(p);
+fr=(1-(1/k(2)))*100; 
+printf('Percentage reduction in field flux is %f percent',fr);
-- 
cgit