From 37d315828bbfc0f5cabee669d2b9dd8cd17b5154 Mon Sep 17 00:00:00 2001
From: hardythe1
Date: Wed, 17 Jun 2015 11:14:34 +0530
Subject: add books

---
 sample_notebooks/saikiranm/CHAPTER4.ipynb | 196 ++++++++++++++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100755 sample_notebooks/saikiranm/CHAPTER4.ipynb

(limited to 'sample_notebooks/saikiranm')

diff --git a/sample_notebooks/saikiranm/CHAPTER4.ipynb b/sample_notebooks/saikiranm/CHAPTER4.ipynb
new file mode 100755
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@@ -0,0 +1,196 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:77734ce79918b96bed43d7baa269682912f0f51f73bf77fadd993778504d6908"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "CHAPTER 4 - Characteristics of AC motor"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "EXAMPLE 4.1 - PG NO:72"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Example 4.1, Page 72\n",
+      "import numpy\n",
+      "p1=numpy.poly1d([1, -3, 1])#Polynomial equation\n",
+      "print('Part a')\n",
+      "print('roots of the equation when slip at max torque')\n",
+      "x=numpy.roots(p1)\n",
+      "print(x)\n",
+      "\n",
+      "\n",
+      "p2=numpy.poly1d([1, -1.719,0.146])#polynomial equation in scilab function\n",
+      "y=numpy.roots(p2)\n",
+      "print('Part b')\n",
+      "print('roots of the equation when slip at max load')\n",
+      "print(y)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Part a\n",
+        "roots of the equation when slip at max torque\n",
+        "[ 2.61803399  0.38196601]\n",
+        "Part b\n",
+        "roots of the equation when slip at max load\n",
+        "[ 1.62939626  0.08960374]\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "EXAMPLE 4.3 - PG NO:76"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Example 4.3, Page 76\n",
+      "import numpy\n",
+      "p1=numpy.poly1d([0.04, -0.0266,.0016 ])#Polynomial equation\n",
+      "print('Part a')\n",
+      "print('roots of the equation that slip will run is')\n",
+      "x=numpy.roots(p1)\n",
+      "print(x)\n",
+      "#answers after calculation are accurate than textbook answers due to approximations"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Part a\n",
+        "roots of the equation that slip will run is\n",
+        "[ 0.59812426  0.06687574]\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "EXAMPLE 4.5 - PG NO:81"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Example 4.5, page 81\n",
+      "import math\n",
+      "pole=24.\n",
+      "Ns=245.#in rpm\n",
+      "N=(120.*50.)/pole#synchronous speed in rpm\n",
+      "f=(N-Ns)/N\n",
+      "p=110.#in kw\n",
+      "T=(p*1000.*60.)/(2.*math.pi*Ns)\n",
+      "v1=440./math.sqrt(3)#in v\n",
+      "ws=(2*math.pi*250)/60\n",
+      "s=0.02\n",
+      "R=0.03125#in ohm\n",
+      "x=math.sqrt(((3*R*v1**2)/(T*ws*s))-(R/s)**2)#by rearranging formula\n",
+      "print'%s %.5f %s' %('Stator resistance per phase is=',x,'ohm')\n",
+      "#calculating original resistance\n",
+      "\n",
+      "#Example 4.1, Page 72\n",
+      "import numpy\n",
+      "p1=numpy.poly1d([3190,-3235,72.78 ])#Polynomial equation\n",
+      "print('Part a')\n",
+      "print('The value of original resistance is')\n",
+      "x=numpy.roots(p1)\n",
+      "print(x)\n",
+      "\n",
+      "#Taking r=0.99108\n",
+      "r=(0.99108-R)/1.25**2\n",
+      "\n",
+      "print'%s %.4f %s' %('The value of resistance to be added is =',r,' ohm')"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Stator resistance per phase is= 0.50358 ohm\n",
+        "Part a\n",
+        "The value of original resistance is\n",
+        "[ 0.99108634  0.02302024]\n",
+        "The value of resistance to be added is = 0.6143  ohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "EXAMPLE 4.6 - PG NO:92"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Example 4.6, Page no 92\n",
+      "import math\n",
+      "print(\"Part ii\")\n",
+      "new_sin_delta=math.sin(math.pi/4)/.95\n",
+      "delta=math.asin(new_sin_delta)\n",
+      "x=math.degrees(delta)\n",
+      "print'%s %.2f %s' %('The value of delta is =',x,'degree')"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Part ii\n",
+        "The value of delta is = 48.10 degree\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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-- 
cgit