From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 1938/CH6/EX6.21/6_21.sce | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100755 1938/CH6/EX6.21/6_21.sce

(limited to '1938/CH6/EX6.21/6_21.sce')

diff --git a/1938/CH6/EX6.21/6_21.sce b/1938/CH6/EX6.21/6_21.sce
new file mode 100755
index 000000000..a394d2a07
--- /dev/null
+++ b/1938/CH6/EX6.21/6_21.sce
@@ -0,0 +1,18 @@
+clc,clear
+printf('Example 6.21\n\n')
+
+V_l=480
+X_d=0.1,X_q=0.075,R_a=0 //armature resistance and synchronous reactance of direct,quadrature axis
+I_l=1200
+I_ph=I_l/sqrt(3)
+V_ph=V_l
+V_t=V_l,I_a=I_ph
+phi=acos(0.8)
+psi=atan(  (V_t*sin(phi)+I_a*X_q)/(V_t*cos(phi)+I_a*R_a)            )
+delta=psi-phi 
+
+I_d=I_a*sin(psi)
+I_q=I_a*cos(psi)
+E_f=V_t*cos(delta)+I_d*X_d+I_q*R_a
+
+printf('Excitation e.m.f is %.2f V ',E_f)
-- 
cgit