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/EX4.25/Ex4_25.sce | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 3760/CH4/EX4.25/Ex4_25.sce

(limited to '3760/CH4/EX4.25/Ex4_25.sce')

diff --git a/3760/CH4/EX4.25/Ex4_25.sce b/3760/CH4/EX4.25/Ex4_25.sce
new file mode 100644
index 000000000..4010123ca
--- /dev/null
+++ b/3760/CH4/EX4.25/Ex4_25.sce
@@ -0,0 +1,18 @@
+clc;
+//repeat part (b) of example 4.21
+
+//PART(a)-
+//When the demagnetizing effect is accounted for, then from equation :-Net mmf = Nf*If+Ns*Is-ATd ....(1)
+//1.26*1000=1.00*1000+10Is-0.022Is*1000
+Ns=round(0.3578*1000/44.5);//no of turns in series field winding
+
+//PART(b)-
+//If there are 10 series field turns, then from equation (1),
+//1.26*1000=1.00*1000+10Is-0.0022Is*1000
+Is=0.26/0.0078
+//Out of the total armature current of 44.5 A, only Is(33.3) should flow through the series field.
+//This can be achieved by putting a resistor in parallel with the series field winding.
+//33.3=(44.5*Rdi)/(0.05+Rdi)
+Rdi=0.05/0.3363;
+printf('NO OF TURNS IN SERIES FIELD WINDING ARE %f.',Ns);
+printf('\nTHE RESISTANCE OF DIVERTER Rdi SHOULD BE %f OHMS.',Rdi);
-- 
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