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

---
 3574/CH5/EX5.19/EX5_19.sce | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 3574/CH5/EX5.19/EX5_19.sce

(limited to '3574/CH5/EX5.19/EX5_19.sce')

diff --git a/3574/CH5/EX5.19/EX5_19.sce b/3574/CH5/EX5.19/EX5_19.sce
new file mode 100644
index 000000000..47f9361b6
--- /dev/null
+++ b/3574/CH5/EX5.19/EX5_19.sce
@@ -0,0 +1,41 @@
+// Example 5.19
+// Computation of (a) Locked rotor current per phase and minimum locked rotor 
+// torque when starting (b) Locked rotor current per phase when motor is delta 
+// connected (c) Code letter 
+// Page No.233
+
+clc;
+clear all;
+close;
+
+// Given data
+V=460;                 // Rated Voltage
+Z=0.547;               // Locked rotor impedance
+n=1750;                // Speed of machine
+hp=60;                 // Horsepower rating of device
+f=60;                  // Frequency of motor 
+
+
+// (a) Locked rotor current per phase and minimum locked rotor torque 
+Vphase=V/sqrt(3);        // Voltage/phase
+Ilr1=Vphase/Z;            // Locked rotor current/phase
+Trated=hp*5252/(n);      // Rated torque
+Tlr=1.4*Trated;          // Locked rotor torque
+T2=Tlr*(Vphase/V)^2;
+
+// (b) Locked rotor current per phase when motor is delta connected 
+Ilr=V/Z;                 // Locked rotor current/phase
+Il=Ilr*sqrt(3);          // Line current
+
+// (c) Code letter
+Slr=sqrt(3)*V*Il/1000;   // Code letter at rated voltage
+kVA=Slr/f;
+
+// Display result on command window
+
+printf("\n Locked rotor current per phase = %0.1f A",Ilr1);
+printf("\n Minimum locked rotor torque = %0.0f lb-ft",T2);
+printf("\n Locked rotor current per phase when motor is delta connected = %0.0f A ",Il);
+printf("\n Code letter = %0.1f",kVA);
+
+
-- 
cgit