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diff --git a/Fundamental_Electrical_and_Electronic_Principles/ch7.ipynb b/Fundamental_Electrical_and_Electronic_Principles/ch7.ipynb new file mode 100755 index 00000000..91ced7ef --- /dev/null +++ b/Fundamental_Electrical_and_Electronic_Principles/ch7.ipynb @@ -0,0 +1,78 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:63415a109c6989d49d84f5199fa0cd1f338b44376604f4b24df855330c3cb38a" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 7: D.C. Machines" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 7.1, Page 243" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf = 200; # The resistance of field winding of a shunt generator, ohm\n", + "Po = 80e+03; # Power delivered by the machine, watt\n", + "V = 450; # The terminal voltage, volt\n", + "E = 475; # The generated emf, volt\n", + "\n", + "\n", + "#Calculations\n", + "# Part (a)\n", + "# Po = V*I_L, solving for I_L\n", + "I_L = Po/V; # Load current, A\n", + "I_f = V/Rf; # Current through field resistor, A\n", + "I_a = I_L + I_f; # Current through armature resistance, A\n", + "# As I_a*Ra = E - V, solving for Ra\n", + "Ra = 25/I_a; # Armature resistance, ohm\n", + "\n", + "# Part (b)\n", + "Po = 50e+03; # Output power delivered by the machine, watt\n", + "V = 460; # The terminal voltage, volt\n", + "I_L = Po/V; # Load current, A\n", + "I_f = V/Rf; # Current through field resistor, A\n", + "I_a = I_L + I_f; # Current through armature resistance, A\n", + "# As I_a*Ra = E - V, solving for E\n", + "E = V + I_a*Ra; # The generated voltage, volt\n", + "\n", + "#Results\n", + "print \"The armature resistance = %5.3f ohm\"%Ra\n", + "print \"The value of generated emf = %5.1f V\"%E\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The armature resistance = 0.139 ohm\n", + "The value of generated emf = 475.4 V\n" + ] + } + ], + "prompt_number": 1 + } + ], + "metadata": {} + } + ] +}
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