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diff --git a/sample_notebooks/saikiranm/CHAPTER4.ipynb b/sample_notebooks/saikiranm/CHAPTER4.ipynb new file mode 100755 index 00000000..951201ff --- /dev/null +++ b/sample_notebooks/saikiranm/CHAPTER4.ipynb @@ -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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