{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Chapter 12 - Power Electronic devices " ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 553 example 1" ] }, { "cell_type": "code", "execution_count": 1, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "source resistance = 111.87 ohm\n" ] } ], "source": [ "from math import sqrt\n", "slope1=130\n", "trivol=15##volt\n", "d=0.5##watts\n", "ig=sqrt(d/slope1)\n", "vg=slope1*ig\n", "r=(trivol-vg)/ig\n", "print \"source resistance = %0.2f\"%((r)),\"ohm\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 553 example 2" ] }, { "cell_type": "code", "execution_count": 2, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "current = 0.010 ampere\n", "input current less than required current\n" ] } ], "source": [ "from math import exp\n", "latcur=50*10**-3##ampere\n", "durpul=50*10**-6##second\n", "induct=0.5##henry\n", "r=20##ohm\n", "voltag=100##volt\n", "w=induct/r\n", "inpcur=-(voltag/r)*((1)-exp(-durpul/w))\n", "print \"current = %0.3f\"%(abs(inpcur)),\"ampere\"\n", "print \"input current less than required current\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 554 example 3" ] }, { "cell_type": "code", "execution_count": 3, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "min duration = 4.00e-06 second\n" ] } ], "source": [ "latcur=4*10**-3##ampere\n", "induct=0.1##henry\n", "voltag=100##volt\n", "durmin=induct*latcur/voltag\n", "print \"min duration = %0.2e\"%((durmin)),\"second\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 554 example 4" ] }, { "cell_type": "code", "execution_count": 4, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "source resistance = 2000.00 ohm\n" ] } ], "source": [ "from math import sqrt\n", "slope1=3*10**3\n", "egs=10##volt\n", "d=0.012##watts\n", "ig=sqrt(d/slope1)\n", "vg=slope1*ig\n", "r=(egs-vg)/ig\n", "\n", "print \"source resistance = %0.2f\"%((r)),\"ohm\"##it is not given in the book" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 554 example 5" ] }, { "cell_type": "code", "execution_count": 5, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "resistance = 14.00 ohm\n", "frequency = 18750.00 hertz\n" ] } ], "source": [ "slope1=16\n", "durmax=4*10**-6##second\n", "curmin=500*10**-3##ampere\n", "voltag=15##volt\n", "#(1) resistance\n", "vg=slope1*curmin\n", "r=(voltag-vg)/curmin\n", "#(2)\n", "d=vg*curmin\n", "freque=0.3/(d*durmax)\n", "print \"resistance = %0.2f\"%((r)),\"ohm\"\n", "print \"frequency = %0.2f\"%((freque)),\"hertz\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 555 example 6" ] }, { "cell_type": "code", "execution_count": 6, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "change of voltage = 800.00 volt per microsecond\n" ] } ], "source": [ "c1=20*10**-12##farad\n", "limcur=16*10**-3##ampere\n", "w=(limcur/c1)*10**-6##convert second to microsecond\n", "print \"change of voltage = %0.2f\"%((w)),\"volt per microsecond\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 555 example 7" ] }, { "cell_type": "code", "execution_count": 7, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "current = 2121.32 ampere\n", "current = 45000.00 ampere square second\n" ] } ], "source": [ "from math import sqrt\n", "ratcur=3000##ampere\n", "freque=50##hertz\n", "i=sqrt(ratcur**2/2)\n", "print \"current = %0.2f\"%((i)),\"ampere\"\n", "i=((ratcur)/sqrt(2))**2/(2*freque)\n", "print \"current = %0.2f\"%((i)),\"ampere square second\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 556 example 9" ] }, { "cell_type": "code", "execution_count": 8, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "max limit resistance = 1410000.00 ohm\n", "min limit resistance = 2650.00 ohm\n", "resistance = 4.67e+04 ohm\n", "rb1 = 100.00 ohm\n", "rb2 = 653.59 ohm\n", "peak voltage = 15.90 volt\n" ] } ], "source": [ "from __future__ import division\n", "from math import log\n", "voltag=30##volt\n", "w=0.51\n", "i1=10*10**-6##ampere\n", "v1=3.5##volt\n", "curen1=10*10**-3##ampere\n", "freque=60##hertz\n", "tridun=50*10**-6##second\n", "pinvol=w*voltag+0.6\n", "r=(voltag-pinvol)/i1\n", "print \"max limit resistance = %0.2f\"%((r)),\"ohm\"\n", "r=(voltag-v1)/(curen1)\n", "print \"min limit resistance = %0.2f\"%((r)),\"ohm\"\n", "capac1=0.5*10**-6##farad\n", "r=(1/freque)*(1/(capac1*log(1/(1-w))))\n", "print \"resistance = %0.2e\"%((r)),\"ohm\"\n", "rb2=10**4/(w*voltag)\n", "rb1=tridun/capac1\n", "print \"rb1 = %0.2f\"%((rb1)),\"ohm\"\n", "print \"rb2 = %0.2f\"%((rb2)),\"ohm\"\n", "print \"peak voltage = %0.2f\"%((pinvol)),\"volt\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## PageNumber 557 example 10" ] }, { "cell_type": "code", "execution_count": 9, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "voltage = 7.00 volt\n", "this voltage makes to off\n" ] } ], "source": [ "re=1*10**3##ohm\n", "i1=5*10**-3##ampere\n", "\n", "voltag=re*i1+2\n", "print \"voltage = %0.2f\"%((voltag)),\"volt\"\n", "\n", "\n", "print \"this voltage makes to off\"" ] } ], "metadata": { "kernelspec": { "display_name": "Python 2", "language": "python", "name": "python2" }, "language_info": { "codemirror_mode": { "name": "ipython", "version": 2 }, "file_extension": ".py", "mimetype": "text/x-python", "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython2", "version": "2.7.9" } }, "nbformat": 4, "nbformat_minor": 0 }