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

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 3731/CH6/EX6.13/Ex6_13.sce | 30 ++++++++++++++++++++++++++++++
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 create mode 100644 3731/CH6/EX6.13/Ex6_13.sce

(limited to '3731/CH6/EX6.13/Ex6_13.sce')

diff --git a/3731/CH6/EX6.13/Ex6_13.sce b/3731/CH6/EX6.13/Ex6_13.sce
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+//Chapter 6:Induction Motor Drives
+//Example 13
+clc;
+
+//Variable Initialization
+
+//Ratings of the star connected Induction motor are same as that of Ex-6.9
+f=50           // frequency in HZ
+Vl=400         //line voltage in V
+P=4            // number of poles
+N=1370         //rated speed
+
+//Parameters referred to the stator
+Xr_=3.5        // rotor winding reactance in ohm
+Xs=Xr_         // stator winding reactance in ohm
+Rr_=3          // resistance of the rotor windings in ohm
+Rs=2           // resistance of the stator windings in ohm
+
+//Solution
+Wms=4*%pi*f/P
+f1=60          //frequency in Hz during speed control of the motor
+K=f1/f         //the value of K at 60Hz 
+x=Rs+sqrt(Rs**2+K**2*(Xs+Xr_)**2)
+Tmax_=3/(2*K*Wms)*(Vl/sqrt(3))**2/x       //torque at 60 Hz frequency
+z=Rs+sqrt(Rs**2+(Xs+Xr_)**2)
+Tmax=3/(2*Wms)*(Vl/sqrt(3))**2/z          //maximum torque
+ratio=Tmax_/Tmax  //ratio
+
+//Result
+mprintf("Ratio of Motor breakdown torque at 60Hz to rated torque at 50Hz is:%.3f",ratio)
-- 
cgit