diff options
Diffstat (limited to 'A Textbook of Electrical Technology AC and DC Machines/chapter28.ipynb')
| -rw-r--r-- | A Textbook of Electrical Technology AC and DC Machines/chapter28.ipynb | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/A Textbook of Electrical Technology AC and DC Machines/chapter28.ipynb b/A Textbook of Electrical Technology AC and DC Machines/chapter28.ipynb new file mode 100644 index 00000000..447ef8ab --- /dev/null +++ b/A Textbook of Electrical Technology AC and DC Machines/chapter28.ipynb @@ -0,0 +1,388 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:6743417a1c79c6197a7cd49755318e10828c09b3cb248c5af8d5364367840700" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 28: Generator Characteristics" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.13, Page Number:984" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "v=220#V\n", + "#emf increases by 1 V for every increase of 6 A\n", + "ra=0.02#ohm\n", + "i=96#A\n", + "\n", + "#calculations\n", + "voltageincrease=i/6\n", + "vd=i*ra\n", + "voltage_rise=voltageincrease-vd\n", + "vconsumer=v+voltage_rise\n", + "power_supplied=voltage_rise*i\n", + "\n", + "#result\n", + "print \"voltage supplied ot consumer= \",vconsumer,\" V\"\n", + "print \"power supplied by the booster itself= \",power_supplied/1000,\" kW\" " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "voltage supplied ot consumer= 234.08 V\n", + "power supplied by the booster itself= 1.35168 kW\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.14, Page Number:985" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "v=50.0#V\n", + "i=200.0#A\n", + "r=0.3#ohm\n", + "i1=200.0#A\n", + "i2=50.0#A\n", + "\n", + "#calculations\n", + "vd=i*r\n", + "voltage_decrease=v-vd\n", + "feeder_drop=v*r\n", + "booster_voltage=v*v/i1\n", + "voltage_net=feeder_drop-booster_voltage\n", + "\n", + "#result\n", + "print \"Net decrease in voltage= \",voltage_net,\" V\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Net decrease in voltage= 2.5 V\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.15, Page Number:986" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "inl=5.0#A\n", + "v=440.0#V\n", + "il=6.0#A\n", + "i_full=200.0#A(full load)\n", + "turns=1600\n", + "\n", + "#calcuations\n", + "shunt_turns1=turns*inl\n", + "shunt_turns2=turns*il\n", + "increase=shunt_turns2-shunt_turns1\n", + "n=increase/i_full#number of series turns required\n", + "\n", + "#result\n", + "print \"Number of series turns required= \",n,\" tunrs/pole\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Number of series turns required= 8.0 tunrs/pole\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.16, Page Number:987" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "n=1000#turns/pole\n", + "series_winding=4#turns/pole\n", + "r=0.05#ohm\n", + "increase_i=0.2#A\n", + "ia=80#A\n", + "\n", + "#calculations\n", + "additional_at=n*increase_i\n", + "current_required=additional_at/series_winding\n", + "R=(current_required*r)/(ia-current_required)\n", + "\n", + "#result\n", + "print \"Divertor resistance= \",R,\" ohm\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Divertor resistance= 0.0833333333333 ohm\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.17, Page Number:987" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "v=220.0#V\n", + "i=100.0#A\n", + "ra=0.1#ohm\n", + "rsh=50.0#ohm\n", + "rse=0.06#ohm\n", + "divertor=0.14#ohm\n", + "\n", + "#calculations\n", + "#short shunt\n", + "vd=i*rse\n", + "ish=v/rsh\n", + "ia=i+ish\n", + "armature_drop=ia*ra\n", + "E=v+vd+armature_drop\n", + "#long shunt\n", + "vd=ia*(ra+rse)\n", + "print vd\n", + "E2=v+vd\n", + "current_divertor=(ia*divertor)/(divertor+rse)\n", + "change=(current_divertor/ia)*100\n", + "\n", + "#result\n", + "print \"a)emf induced using short shunt= \",E\n", + "print \"b)emf induced using long shunt= \",E2\n", + "print \"c)series amp-turns are reduced to \",change,\" %\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "16.704\n", + "a)emf induced using short shunt= 236.44\n", + "b)emf induced using long shunt= 236.704\n", + "c)series amp-turns are reduced to 70.0 %\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.18, Page Number:988" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "p=250*1000#W\n", + "v=240#V\n", + "v2=220#V\n", + "i=7#A\n", + "inl=12#A\n", + "shunt=650#turns/pole\n", + "series=4#turns/pole\n", + "rse=0.006#ohm\n", + "\n", + "#calculations\n", + "i_fulload=p/v\n", + "shunt_increase=shunt*(inl-i)\n", + "ise=shunt_increase/series\n", + "i_d=i_fulload-ise\n", + "Rd=(ise*rse)/i_d\n", + "\n", + "#results\n", + "print \"resistance of the series amp-turns at no-load\",Rd,\"ohm\"\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "resistance of the series amp-turns at no-load 0.0212751091703 ohm\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.19, Page Number:988" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "p=60.0*1000#W\n", + "n=1600.0#turns/pole\n", + "inl=1.25#A\n", + "vnl=125#V\n", + "il=1.75#A\n", + "vl=150.0#V\n", + "\n", + "#calculations\n", + "extra_excitation=n*(il-inl)\n", + "ise=p/vl\n", + "series=extra_excitation/ise\n", + "ise2=extra_excitation/3\n", + "i_d=ise-ise2\n", + "rd=(ise2*0.02)/i_d\n", + "reg=(vnl-vl)*100/vl\n", + "\n", + "#result\n", + "print \"i)minimum number of series turns/pole= \",series\n", + "print \"ii)divertor resistance= \",rd\n", + "print \"iii)voltage regulation= \",reg,\"%\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i)minimum number of series turns/pole= 2.0\n", + "ii)divertor resistance= 0.04\n", + "iii)voltage regulation= -16.6666666667 %\n" + ] + } + ], + "prompt_number": 26 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example Number 28.20, Page Number:989" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "v=50.0#v\n", + "i=200.0#A\n", + "r=0.3#ohm\n", + "i1=160.0#A\n", + "i2=50.0#A\n", + "\n", + "#calculations\n", + "#160 A\n", + "vd=i1*(r-(v/i))\n", + "#50 A\n", + "vd2=i2*(r-(v/i))\n", + "\n", + "#result\n", + "print \"voltage drop at 160 A=\",vd,\"V\"\n", + "print \"voltage drop at 50 A=\",vd2,\"V\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "voltage drop at 160 A= 8.0 V\n", + "voltage drop at 50 A= 2.5 V\n" + ] + } + ], + "prompt_number": 33 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file |