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

---
 2252/CH23/EX23.13/Ex23_13.sce | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100755 2252/CH23/EX23.13/Ex23_13.sce

(limited to '2252/CH23/EX23.13')

diff --git a/2252/CH23/EX23.13/Ex23_13.sce b/2252/CH23/EX23.13/Ex23_13.sce
new file mode 100755
index 000000000..85a00b6af
--- /dev/null
+++ b/2252/CH23/EX23.13/Ex23_13.sce
@@ -0,0 +1,24 @@
+
+
+//calculating ratio of maximum to full load torque
+Nr=970//speed at full load torque in rpm
+Ns=50*120/6//synchronous speed in rpm
+s=(Ns-Nr)/Ns//slip at full load
+R2=.02//rotor resistance per phase
+X2=.3//rotor reactance per phase at standstill
+alpha=R2/X2
+//Full load torque Tf=k1*Kt
+k1=s*alpha/(s^2+alpha^2)
+//maximum torque Tmax=Kt/2
+x=1/(2*k1)
+mprintf("Ratio of maximum to full load torque=%f\n",x)
+//calculating speed at maximum torque
+s_m=R2/X2//slip at maximum torque
+Nm=(1-s_m)*Ns
+mprintf("Speed at maximum torque=%d rpm\n",round(Nm))
+//calculating ratio of starting torque to full load torque
+s=1//slip at starting
+//starting torque Tst=k2*Kt
+k2=s*alpha/(s^2+alpha^2)
+y=k2/k1
+mprintf("Ratio of starting torque to full load torque=%f\n",y)
-- 
cgit