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| author | hardythe1 | 2015-04-07 15:58:05 +0530 |
|---|---|---|
| committer | hardythe1 | 2015-04-07 15:58:05 +0530 |
| commit | 92cca121f959c6616e3da431c1e2d23c4fa5e886 (patch) | |
| tree | 205e68d0ce598ac5caca7de839a2934d746cce86 /Electric_Machinery_and_Transformers/CHAP_5.ipynb | |
| parent | b14c13fcc6bb6d01c468805d612acb353ec168ac (diff) | |
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| -rwxr-xr-x | Electric_Machinery_and_Transformers/CHAP_5.ipynb | 113 |
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diff --git a/Electric_Machinery_and_Transformers/CHAP_5.ipynb b/Electric_Machinery_and_Transformers/CHAP_5.ipynb new file mode 100755 index 00000000..b5f7d623 --- /dev/null +++ b/Electric_Machinery_and_Transformers/CHAP_5.ipynb @@ -0,0 +1,113 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "CHAPTER 5: ARMATURE REACTION AND COMMUTATION IN DYNAMOS"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.1, Page number 140"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "conductors = 800.0 #Number of conductors \n",
+ "I_a = 1000.0 #Rated armature current(A)\n",
+ "P = 10.0 #Number of poles\n",
+ "pitch = 0.7 #Pole-face covers 70% of the pitch \n",
+ "a = P #Number of parallel paths for Simplex lap-wound\n",
+ "\n",
+ "#Calculation\n",
+ "Z = conductors/P #Number of armature conductors/path under each pole\n",
+ "Z_a = Z*pitch #Active armature conductors/pole\n",
+ "Z_p = Z_a/a #Number of pole face conductors/pole \n",
+ "\n",
+ "#Result\n",
+ "print('Number of pole face conductors/pole , Z_p = %.1f or %.f conductors/pole' %(Z_p,Z_p))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Number of pole face conductors/pole , Z_p = 5.6 or 6 conductors/pole\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.2, Page number 140"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "conductors = 800.0 #Number of conductors \n",
+ "I_a = 1000.0 #Rated armature current(A)\n",
+ "I_l = I_a #Load or total current entering the armature(A)\n",
+ "P = 10.0 #Number of poles\n",
+ "pitch = 0.7 #Pole-face covers 70% of the pitch \n",
+ "a = P #Number of parallel paths for Simplex lap-wound\n",
+ "alpha = 5.0 #Number of electrical degress that the brushes are shifted \n",
+ "\n",
+ "#Calculation\n",
+ "Z = conductors/P #Number of armature conductors/path under each pole\n",
+ "A_Z_per_pole = (Z*I_l)/(P*a) #Cross magnetizing ampere-conductors/pole\n",
+ "At_per_pole = (1.0/2)*(8000/1) #Ampere-turns/pole\n",
+ "frac_demag_At_per_pole = (2*alpha)/180*(At_per_pole) #Fraction of demagnetizing ampere-turns/pole\n",
+ "beta = 180-2*alpha #Cross-magnetizing electrical degrees\n",
+ "cross_mag_At_per_pole = (beta/180)*(At_per_pole) #Cross-magnetizing ampere-turns/pole\n",
+ "\n",
+ "#Result\n",
+ "print('(a) The cross-magnetizing ampere-conductors/pole = %.1f ampere-conductors/pole' %A_Z_per_pole)\n",
+ "print(' The cross-magnetizing ampere-turns/pole = %.1f At/pole' %At_per_pole)\n",
+ "print('(b) The fraction of demagnetizing ampere-turns/pole = %.1f At/pole' %frac_demag_At_per_pole)\n",
+ "print('(c) The cross-magnetizing ampere-turns/pole = %.f At/pole' %cross_mag_At_per_pole)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) The cross-magnetizing ampere-conductors/pole = 800.0 ampere-conductors/pole\n",
+ " The cross-magnetizing ampere-turns/pole = 4000.0 At/pole\n",
+ "(b) The fraction of demagnetizing ampere-turns/pole = 222.2 At/pole\n",
+ "(c) The cross-magnetizing ampere-turns/pole = 3778 At/pole\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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