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/EX4.26/Ex4_26.sce | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 3760/CH4/EX4.26/Ex4_26.sce

(limited to '3760/CH4/EX4.26')

diff --git a/3760/CH4/EX4.26/Ex4_26.sce b/3760/CH4/EX4.26/Ex4_26.sce
new file mode 100644
index 000000000..2344fb06c
--- /dev/null
+++ b/3760/CH4/EX4.26/Ex4_26.sce
@@ -0,0 +1,29 @@
+clc;
+Vt=250;//rated o/p voltage of generator
+Pout=10000;//o/p of generator in watts
+Ra=0.4;//armature resistance
+Rse=0.2;//series field resistance
+Rs=125;//shunt field reesistance
+Vb=2;//total brush cotact drop
+Il=Pout/Vt;//load current
+
+//PART(a)-LONG SHUNT CONNECTION
+If=Vt/Rs;//shunt field current
+Ia=Il+If;//armature current
+//series field winding also carries Ia.
+Eal=Vt+Ia*(Rse+Ra)+Vb;//generated emf in armature
+printf('The generated EMF in armature when the generated is connected as long shunt machine is %f.\n',Eal);
+
+//PART(b)-SHORT SHUNT CONNECTION
+V=Vt+Il*Rse;//voltage across shunt field and armature terminals
+If_=V/Rs;//shunt field current
+Ia_=Il+If_;//armature current
+Eas=V+Ia*Ra+Vb;//generated emf in armature
+printf('The generated EMF in armature when the generated is connected as short shunt machine is %f.',Eas);
+
+//PART(c)-
+//Series field ampere turns are proportional to series-field current I
+//Is=0.3/0.5*I, where , Is is series field current with diverter.
+//series field ampere-turns with dvider = K*0.6*Is, where K is a constant.
+//percentage reduction in series field ampere turns is - ((I-O.6I)/I)*100.
+disp('Percentage reduction in series field ampere turns is 40%.');
-- 
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