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| author | hardythe1 | 2015-04-07 15:58:05 +0530 |
|---|---|---|
| committer | hardythe1 | 2015-04-07 15:58:05 +0530 |
| commit | c7fe425ef3c5e8804f2f5de3d8fffedf5e2f1131 (patch) | |
| tree | 725a7d43dc1687edf95bc36d39bebc3000f1de8f /Power_Electronics/Power_electronics_ch_7.ipynb | |
| parent | 62aa228e2519ac7b7f1aef53001f2f2e988a6eb1 (diff) | |
| download | Python-Textbook-Companions-c7fe425ef3c5e8804f2f5de3d8fffedf5e2f1131.tar.gz Python-Textbook-Companions-c7fe425ef3c5e8804f2f5de3d8fffedf5e2f1131.tar.bz2 Python-Textbook-Companions-c7fe425ef3c5e8804f2f5de3d8fffedf5e2f1131.zip | |
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diff --git a/Power_Electronics/Power_electronics_ch_7.ipynb b/Power_Electronics/Power_electronics_ch_7.ipynb new file mode 100755 index 00000000..7288e1e0 --- /dev/null +++ b/Power_Electronics/Power_electronics_ch_7.ipynb @@ -0,0 +1,204 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 7 : Cycloconverters"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 7.1, Page No.319"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# input voltage, SCR ratings and input power factors\n",
+ "\n",
+ "import math\n",
+ "#variable declaration\n",
+ "V = 250 # single phase supply voltage \n",
+ "I = 50 # supply current\n",
+ "pf = 0.8 # lagging power factor\n",
+ "alfa = 0 # ideal SCR\n",
+ "\n",
+ "#calculations\n",
+ "x = math.sqrt(2)\n",
+ "x = math.floor(x*1000)/1000\n",
+ "Vm = (V*math.pi*x)/(3*math.sin(math.pi/3))\n",
+ "Vrms = Vm/math.sqrt(2)\n",
+ "Irms = I*math.sqrt(2)/math.sqrt(3)\n",
+ "y = math.sqrt(3)\n",
+ "y = math.floor(y*1000)/1000\n",
+ "piv = y*Vm\n",
+ "piv = math.floor(piv*100)/100\n",
+ "Ii = math.sqrt((I**2)/3)\n",
+ "pipp = V*I*pf/3.0\n",
+ "pf_i = pipp/(Vrms*Ii)\n",
+ "\n",
+ "#Result\n",
+ "print(\"Vm = %f V\\nrms current rating of thyristor = %.1f A\\nPIV = %.2fV\\nRMS value of input current = %.1f A\"%(Vm,math.ceil(Irms),piv,Ii))\n",
+ "print(\"Power input per phase = %.2f W\\nInput power factor = %.3f lagging.\"%(pipp,pf_i))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Vm = 427.452050 V\n",
+ "rms current rating of thyristor = 41.0 A\n",
+ "PIV = 740.34V\n",
+ "RMS value of input current = 28.9 A\n",
+ "Power input per phase = 3333.33 W\n",
+ "Input power factor = 0.382 lagging.\n"
+ ]
+ }
+ ],
+ "prompt_number": 32
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 7.2, Page No. 320"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#output voltage(referring ex 7.1)\n",
+ "\n",
+ "import math\n",
+ "#variable declaration\n",
+ "V = 250 # single phase supply voltage \n",
+ "theta1 = 30 # firing angle 1\n",
+ "theta2 = 45 # firing angle 2\n",
+ "\n",
+ "#calculations\n",
+ "#(a)\n",
+ "v1 = V*math.cos(theta1*math.pi/180)\n",
+ "#(b)\n",
+ "v2 = V*math.cos(theta2*math.pi/180)\n",
+ "\n",
+ "#Result\n",
+ "print(\"(a) RMS value of output voltage = %.1f V\"%v1)\n",
+ "print(\"(b) RMS value of output voltage = %.2f V\"%v2)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) RMS value of output voltage = 216.5 V\n",
+ "(b) RMS value of output voltage = 176.78 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 35
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 7.3, Page No.320"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Output voltage for different firing angle\n",
+ "\n",
+ "import math\n",
+ "#variable declaration\n",
+ "Vrms = 230 # input voltage\n",
+ "theta1 = 0 # firing angle 1\n",
+ "theta2 = 30 # firing angle 2\n",
+ "\n",
+ "#calculation\n",
+ "#(a)\n",
+ "v1 = 6*math.sqrt(2)*Vrms*math.sin(math.pi/6)*math.cos(theta1*math.pi/180)/(math.pi*math.sqrt(2))\n",
+ "#(b)\n",
+ "v2 = 6*math.sqrt(2)*Vrms*math.sin(math.pi/6)*math.cos(theta2*math.pi/180)/(math.pi*math.sqrt(2))\n",
+ "\n",
+ "\n",
+ "#Result\n",
+ "print(\"(a) Vo = %.2f V\\n(b) Vo = %.1f V\"%(v1,v2))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) Vo = 219.63 V\n",
+ "(b) Vo = 190.2 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 37
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 7.4, Page No.320"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# supply voltage\n",
+ "\n",
+ "import math\n",
+ "#variable declaration\n",
+ "Vo = 200 # output voltage\n",
+ "\n",
+ "#Calculation\n",
+ "Vi = Vo*(math.pi/3)/math.sin(math.pi/3)\n",
+ "\n",
+ "#Result\n",
+ "print(\"RMS value of input voltage = %.2f V \"%Vi)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "RMS value of input voltage = 241.84 V \n"
+ ]
+ }
+ ],
+ "prompt_number": 38
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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