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diff --git a/Material_Science_In_Engineering/ch14.ipynb b/Material_Science_In_Engineering/ch14.ipynb new file mode 100755 index 00000000..14bec84f --- /dev/null +++ b/Material_Science_In_Engineering/ch14.ipynb @@ -0,0 +1,344 @@ +{ + "metadata": { + "name": "" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 14 : Magnetic Properties and Materials" + ] + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.1 pageno : 358" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "x = 1500.;\t\t\t#susceptibility\n", + "h = 2400.;\t\t\t#mafnetic field in A/m\n", + "\n", + "# Calculations\n", + "u_r = 1+x;\n", + "m = x*h;\t\t\t #in A/m\n", + "u_0 = 4*3.14*10**-7;\n", + "b = u_0*u_r*h;\t\t\t#in T\n", + "\n", + "# Results\n", + "print \"relative permeability = \",u_r\n", + "print \"Intensity of magnetisation (in A/m)\",m\n", + "print \"Remanance (in T) = \",b\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "relative permeability = 1501.0\n", + "Intensity of magnetisation (in A/m) 3600000.0\n", + "Remanance (in T) = 4.5246144\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.2 page no : 368" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "# Variables\n", + "w = 80. + 80;\t\t\t#width of loop in A/m from graph\n", + "h = 0.15 + .15;\t\t\t#height of loop in Wb/sqm\n", + "\n", + "# Calculations\n", + "a = w*h;\t\t\t #area of the loop in J\n", + "\n", + "# Results\n", + "print \"Hysteresis energy loss per unit volume of magnetic material during one cycle (in J) = %d J\"%a\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Hysteresis energy loss per unit volume of magnetic material during one cycle (in J) = 48 J\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.3 pageno : 370" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "a = 600.;\t\t\t#loop area in J/sqm\n", + "f = 50.;\t\t\t#in Hz\n", + "v = 0.01\t\t\t#volume in cu. m\n", + "\n", + "# Calculations\n", + "w = a*f*v;\t\t\t#in W\n", + "\n", + "# Results\n", + "print \"Power loss due to Hysteresis (in W) = %.f watt\"%w\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Power loss due to Hysteresis (in W) = 300 watt\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.4 pageno : 370" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "w_h1 = 300.; # hysteresis loss\n", + "b_1 = 0.9; # max. flux density\n", + "\n", + "y = b_1**1.7;\n", + "b_2 = 1.1; #raised flux density(Wb/m^2)\n", + "x = b_2**1.7;\n", + "f1 = 50*10**-7; #frequency(Hz)\n", + "f2 = 40*10**-7; #frequency(Hz)\n", + "\n", + "# Calculations\n", + "w_h2 = (w_h1*x*f2)/(y*f1);\n", + "\n", + "\n", + "# Results\n", + "print \"Loss at 40 Hz (in W) = %.f W\"%w_h2\n", + "\n", + "# Note : Answer in book is wrong. Please calculate manually." + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Loss at 40 Hz (in W) = 338 W\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.5 pageno : 376" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "m = 6000.; # megnetization\n", + "u_r = 200000.; # relative permeability\n", + "\n", + "# Calculations\n", + "x = u_r-1;\n", + "h = m/x;\n", + "u_0 = 4*3.14*10**-7;\n", + "b = u_0*u_r*h;\n", + "\n", + "# Results\n", + "print \"Magnetic strength (in T) = %.5f tesla\"%b\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Magnetic strength (in T) = 0.00754 tesla\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.6 pageno : 376" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "b = 9.27*10**-24;\t\t\t#Bohr Magneton in A/sqm\n", + "m = 0.6*b;\n", + "\n", + "# Calculations\n", + "a = 0.35*10**-9;\n", + "n = 4.;\t\t\t#FCC\n", + "m_g = n*m/a**3;\t\t\t#in A/m\n", + "\n", + "# Results\n", + "print \"Saturation Magnetisation (in A/m) = %.2e A/m\"%m_g\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Saturation Magnetisation (in A/m) = 5.19e+05 A/m\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.9 page no : 381" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "f = 50.;\t\t\t#in Hz\n", + "L = 100.;\t\t\t#Eddy current loss in transformer in W\n", + "f1 = 60.;\t\t\t#in Hz\n", + "f2 = 100;\t\t\t#in Hz\n", + "\n", + "# Calculations\n", + "w_e = L*(f1/f)**2;\t\t\t#in W\n", + "w_ee = L*(f2/f)**2;\t\t\t#in W\n", + "\n", + "# Results\n", + "print \"Eddy current loss at 60 Hz (in W) = %.1f W\"%w_e\n", + "print \"Eddy current loss at 100 Hz (in W) = %.1f W\"%w_ee\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Eddy current loss at 60 Hz (in W) = 144.0 W\n", + "Eddy current loss at 100 Hz (in W) = 400.0 W\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 14.13 pageno : 382" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "l = .25;\t\t\t#in m\n", + "n = 400.;\t\t\t#turns\n", + "i = 15.;\t\t\t#in A\n", + "\n", + "# Calculations\n", + "u_0 = 1.257*10**-6;\t\t\t#in H/m\n", + "h = n*i/l;\t\t\t#in AT/m\n", + "u_r = 1;\t\t\t#relative permeability\n", + "b = u_0*u_r*h;\t\t\t#in wB/sqm\n", + "\n", + "# Results\n", + "print \"Magnetic field strength (in AT/m) = %.1f AT/m\"%h\n", + "print \"Flux density (in Wb/sq m) = %.2f Wb/m**2\"%b\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Magnetic field strength (in AT/m) = 24000.0 AT/m\n", + "Flux density (in Wb/sq m) = 0.03 Wb/m**2\n" + ] + } + ], + "prompt_number": 12 + } + ], + "metadata": {} + } + ] +}
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