From db0855dbeb41ecb8a51dde8587d43e5d7e83620f Mon Sep 17 00:00:00 2001 From: Thomas Stephen Lee Date: Fri, 28 Aug 2015 16:53:23 +0530 Subject: add books --- Power_Electronics/Chapter9_2.ipynb | 388 ------------------------------------- 1 file changed, 388 deletions(-) delete mode 100755 Power_Electronics/Chapter9_2.ipynb (limited to 'Power_Electronics/Chapter9_2.ipynb') diff --git a/Power_Electronics/Chapter9_2.ipynb b/Power_Electronics/Chapter9_2.ipynb deleted file mode 100755 index 052c4736..00000000 --- a/Power_Electronics/Chapter9_2.ipynb +++ /dev/null @@ -1,388 +0,0 @@ -{ - "metadata": { - "name": "" - }, - "nbformat": 3, - "nbformat_minor": 0, - "worksheets": [ - { - "cells": [ - { - "cell_type": "heading", - "level": 1, - "metadata": {}, - "source": [ - "Chapter 09 : AC Voltage Controllers" - ] - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9.1, Page No 560" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "V_s=230.0\n", - "V_m=math.sqrt(2)*V_s\n", - "a=45.0\n", - "\n", - "#Calculations\n", - "V_or=(V_m/2)*math.sqrt(1/math.pi*((2*math.pi-a*math.pi/180)+math.sin(math.radians(2*a))/2)) \n", - "R=20\n", - "I_or=V_or/R\n", - "P_o=I_or**2*R \n", - "I_s=I_or\n", - "VA=V_s*I_s\n", - "pf=P_o/VA \n", - "V_o=math.sqrt(2)*V_s/(2*math.pi)*(math.cos(math.radians(a))-1)\n", - "I_ON=V_o/R \n", - "\n", - "#Results\n", - "print(\"rms value of o/p voltage=%.3f V\" %V_or)\n", - "print(\"load power=%.1f W\" %P_o)\n", - "print(\"i/p pf=%.4f\" %pf)\n", - "print(\"avg i/p current=%.4f A\" %I_ON)" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "rms value of o/p voltage=224.716 V\n", - "load power=2524.9 W\n", - "i/p pf=0.9770\n", - "avg i/p current=-0.7581 A\n" - ] - } - ], - "prompt_number": 1 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9.2, Page No 560" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "V_s=230.0\n", - "V_m=math.sqrt(2)*V_s\n", - "a=45.0\n", - "\n", - "#Calculations\n", - "V_or=(V_s)*math.sqrt(1/math.pi*((math.pi-a*math.pi/180)+math.sin(math.radians(2*a))/2)) \n", - "R=20\n", - "I_or=V_or/R\n", - "P_o=I_or**2*R \n", - "I_s=I_or\n", - "VA=V_s*I_s\n", - "pf=P_o/VA \n", - "I_TA=math.sqrt(2)*V_s/(2*math.pi*R)*(math.cos(math.radians(a))+1) \n", - "I_Tr=math.sqrt(2)*V_s/(2*R)*math.sqrt(1/math.pi*((math.pi-a*math.pi/180)+math.sin(math.radians(2*a))/2)) \n", - "\n", - "#Results\n", - "print(\"rms value of o/p voltage=%.3f V\" %V_or)\n", - "print(\"load power=%.2f W\" %P_o)\n", - "print(\"i/p pf=%.2f\" %pf)\n", - "print(\"avg thyristor current=%.2f A\" %I_TA) \n", - "print(\"rms value of thyristor current=%.2f A\" %I_Tr)" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "rms value of o/p voltage=219.304 V\n", - "load power=2404.71 W\n", - "i/p pf=0.95\n", - "avg thyristor current=4.42 A\n", - "rms value of thyristor current=7.75 A\n" - ] - } - ], - "prompt_number": 2 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9.3 Page No 564" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "V_s=230.0\n", - "n=6.0 #on cycles\n", - "m=4.0 #off cycles\n", - "\n", - "#Calculations\n", - "k=n/(n+m)\n", - "V_or=V_s*math.sqrt(k) \n", - "pf=math.sqrt(k) \n", - "R=15\n", - "I_m=V_s*math.sqrt(2)/R\n", - "I_TA=k*I_m/math.pi\n", - "I_TR=I_m*math.sqrt(k)/2 \n", - " \n", - "#Results\n", - "print(\"rms value of o/ voltage=%.2f V\" %V_or)\n", - "print(\"i/p pf=%.2f\" %pf)\n", - "print(\"avg thyristor current=%.2f A\" %I_TA) \n", - "print(\"rms value of thyristor current=%.2f A\" %I_TR)\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "rms value of o/ voltage=178.16 V\n", - "i/p pf=0.77\n", - "avg thyristor current=4.14 A\n", - "rms value of thyristor current=8.40 A\n" - ] - } - ], - "prompt_number": 3 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9.4, Page No 569" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "V_s=230.0\n", - "V_m=math.sqrt(2)*V_s\n", - "R=3.0\n", - "\n", - "#Calculations\n", - "I_TAM1=2*V_m/(2*math.pi*R) \n", - "I_TRM2=V_m/(2*R) \n", - "f=50\n", - "w=2*math.pi*f\n", - "t_c=math.pi/w \n", - " \n", - "#Results\n", - "print(\"max value of avg thyristor current=%.3f A\" %I_TAM1)\n", - "print(\"max value of avg thyristor current=%.3f A\" %I_TRM2)\n", - "print(\"ckt turn off time=%.0f ms\" %(t_c*1000))" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "max value of avg thyristor current=34.512 A\n", - "max value of avg thyristor current=54.212 A\n", - "ckt turn off time=10 ms\n" - ] - } - ], - "prompt_number": 4 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9.5 Page No 575" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "R=3.0\n", - "X_L=4.0\n", - "\n", - "#Calculations\n", - "phi=math.degrees(math.atan(X_L/R)) \n", - "V_s=230\n", - "Z=math.sqrt(R**2+X_L**2)\n", - "I_or=V_s/Z \n", - "P=I_or**2*R \n", - "I_s=I_or\n", - "pf=P/(V_s*I_s) \n", - "I_TAM=math.sqrt(2)*V_s/(math.pi*Z) \n", - "I_Tm=math.sqrt(2)*V_s/(2*Z) \n", - "f=50\n", - "w=2*math.pi*f\n", - "di=math.sqrt(2)*V_s*w/Z \n", - "\n", - "#Results\n", - "print(\"min firing angle=%.2f deg\" %phi)\n", - "print(\"\\nmax firing angle=%.0f deg\" %180)\n", - "print(\"i/p pf=%.1f\" %pf)\n", - "print(\"max value of rms load current=%.0f A\" %I_or)\n", - "print(\"max power=%.0f W\" %P)\n", - "print(\"max value of avg thyristor current=%.3f A\" %I_TAM)\n", - "print(\"max value of rms thyristor current=%.3f A\" %I_Tm)\n", - "print(\"di/dt=%.0f A/s\" %di)" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "min firing angle=53.13 deg\n", - "\n", - "max firing angle=180 deg\n", - "i/p pf=0.6\n", - "max value of rms load current=46 A\n", - "max power=6348 W\n", - "max value of avg thyristor current=20.707 A\n", - "max value of rms thyristor current=32.527 A\n", - "di/dt=20437 A/s\n" - ] - } - ], - "prompt_number": 5 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9.6 Page No 576" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "V=230.0\n", - "R=3.0 #ohm\n", - "X_L=5.0 #ohm\n", - "a=120.0 #firing angle delay\n", - "\n", - "#Calculations\n", - "phi=math.degrees(math.atan(X_L/R))\n", - "b=0\n", - "i=1\n", - "while (i>0) :\n", - " LHS=math.sin(math.radians(b-a))\n", - " RHS=math.sin(math.radians(a-phi))*math.exp(-(R/X_L)*(b-a)*math.pi/180)\n", - " if math.fabs(LHS-RHS)<= 0.01 :\n", - " B=b\n", - " i=2\n", - " break\n", - " \n", - " b=b+.1 \n", - "V_or=math.sqrt(2)*V*math.sqrt((1/(2*math.pi))*((B-a)*math.pi/180+(math.sin(math.radians(2*a))-math.sin(math.radians(2*B)))/2))\n", - "\n", - "\n", - "#Results\n", - "print(\"Extinction angle=%.1f deg\" %B) #answer in the book is wrong as formulae for RHS is wrongly employed\n", - "print(\"rms value of output voltage=%.2f V\" %V_or) #answer do not match due to wrong B in book\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Extinction angle=156.1 deg\n", - "rms value of output voltage=97.75 V\n" - ] - } - ], - "prompt_number": 6 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9.8, Page No 581" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "V_s=230.0\n", - "V_m=math.sqrt(2)*V_s\n", - "a=60.0\n", - "R=20.0\n", - "\n", - "#Calculations\n", - "V_or=math.sqrt((V_m**2/(2*math.pi))*(a*math.pi/180-math.sin(math.radians(2*a))/2)+(2*V_m**2/(math.pi))*(math.pi-a*math.pi/180+math.sin(math.radians(2*a))/2)) \n", - "I_T1r=(V_m/R)*math.sqrt(1/math.pi*((math.pi-a*math.pi/180)+math.sin(math.radians(2*a))/2)) \n", - "I_T3r=(V_m/(2*R))*math.sqrt(1/math.pi*((a*math.pi/180)-math.sin(math.radians(2*a))/2)) \n", - "I1=math.sqrt(2)*I_T1r\n", - "I3=math.sqrt((math.sqrt(2)*I_T1r)**2+(math.sqrt(2)*I_T3r)**2)\n", - "r=V_s*(I1+I3) \n", - "P_o=V_or**2/R\n", - "pf=P_o/r \n", - "\n", - "#Results\n", - "print(\"rms value of o/p voltage=%.2f V\" %V_or)\n", - "print(\"rms value of current for upper thyristors=%.2f A\" %I_T1r)\n", - "print(\"rms value of current for lower thyristors=%.2f A\" %I_T3r)\n", - "print(\"t/f VA rating=%.2f VA\" %r)\n", - "print(\"i/p pf=%.2f\" %pf)" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "rms value of o/p voltage=424.94 V\n", - "rms value of current for upper thyristors=14.59 A\n", - "rms value of current for lower thyristors=3.60 A\n", - "t/f VA rating=9631.61 VA\n", - "i/p pf=0.94\n" - ] - } - ], - "prompt_number": 7 - } - ], - "metadata": {} - } - ] -} \ No newline at end of file -- cgit