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+{
+ "metadata": {
+ "name": "Chapter_17"
+ },
+ "nbformat": 2,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h1>Chapter 17: Voltage Regulators<h1>"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.1, Page Number:552 <h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "%pylab inline"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Welcome to pylab, a matplotlib-based Python environment [backend: module://IPython.zmq.pylab.backend_inline].",
+ "For more information, type 'help(pylab)'."
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Percentage line regulation'''",
+ "",
+ "#variable declaration",
+ "Del_V_out=0.25;",
+ "V_out=15;",
+ "Del_V_in=5; #All voltages in Volts",
+ "",
+ "#Calculations",
+ "line_regulation=((Del_V_out/V_out)/Del_V_in)*100;",
+ "",
+ "#Result",
+ "print('line regulation in %%V is %f' %line_regulation)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "line regulation in %V is 0.333333"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.2, Page Number: 553<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "''' Load regulation percentage'''",
+ "",
+ "# Variable Declaration",
+ "V_NL=12.0; #No load output voltage in Volts",
+ "V_FL=11.9; #Full load output voltage in Volts",
+ "I_F=10.0; #Full load current in milli-Amperes",
+ "",
+ "#Calculations",
+ "load_regulation=((V_NL-V_FL)/V_FL)*100;",
+ "load_reg=load_regulation/I_F;",
+ "",
+ "#Result",
+ "print('load regulation as percentage change from no load to full load = %f'%load_regulation)",
+ "print('\\nload regulation as percentage change per milliampere = %f' %load_reg)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "load regulation as percentage change from no load to full load = 0.840336",
+ "",
+ "load regulation as percentage change per milliampere = 0.084034"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.3, Page Number: 556<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Series regulator'''",
+ "",
+ "",
+ "V_REF=5.1 #Zener voltage in volts",
+ "R2=10*10**3;",
+ "R3=10*10**3; #resistances in ohm",
+ "V_out=(1+(R2/R3))*V_REF;",
+ "print('output voltage in volts = %.1f'%V_out)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "output voltage in volts = 10.2"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.4, Page Number: 557<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Overload protection'''",
+ "",
+ "R4=1; #Resistance in Ohms",
+ "I_L_max=0.7/R4;",
+ "print('maximum current provided to load(in amperes) = %.1f'%I_L_max)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "maximum current provided to load(in amperes) = 0.7"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.5, Page Number: 560<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Shunt regulator'''",
+ "",
+ "V_IN=12.5; #maximum input voltage in volts",
+ "R1=22; #In Ohms",
+ "#Worst case of power dissipation is when V_OUT=0V",
+ "V_OUT=0;",
+ "V_R1=V_IN-V_OUT; #Voltage across R1",
+ "P_R1=(V_R1*V_R1)/R1; #maximum power dissipated by R1",
+ "print('maximum power dissipated by R1 in WATTS = %f'%P_R1)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "maximum power dissipated by R1 in WATTS = 7.102273"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.6, Page Number: 569<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Positive linear voltage regulator'''",
+ "",
+ "print('SAME AS EX-2.8 in CHAPTER-2')"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "SAME AS EX-2.8 in CHAPTER-2"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.7, Page Number: 572<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''External pass Filter'''",
+ "",
+ "I_max=700*10**-3; #in Amperes",
+ "R_ext=0.7/I_max;",
+ "print('value of resistor in Ohms for which max current is 700mA = %f'%R_ext)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "value of resistor in Ohms for which max current is 700mA = 1.000000"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.8, Page Number: 572<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Power rating 7824'''",
+ "",
+ "V_OUT=24.0; #Output voltage in Volts",
+ "R_L=10.0; #Load resistance in Ohms",
+ "V_IN=30.0; #Input voltage in Volts",
+ "I_max=700.0*10**-3; #maximum interal current in Amperes",
+ "I_L=V_OUT/R_L; #load current in amperes",
+ "I_ext=I_L-I_max; #current through the external pass transistor in Amperes",
+ "P_ext_Qext=I_ext*(V_IN-V_OUT); #power dissipated",
+ "print('power dissiated(in WATTS) by the external pass transistor = %.1f'%P_ext_Qext)",
+ "print('\\nFor safety purpose, we choose a power transistor with rating more than this, say 15W')"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "power dissiated(in WATTS) by the external pass transistor = 10.2",
+ "",
+ "For safety purpose, we choose a power transistor with rating more than this, say 15W"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 17.9, Page Number: 574<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Current regulator'''",
+ "",
+ "V_out=5.0; #7805 gives output voltage of 5V",
+ "I_L=1.0; #constant current of 1A",
+ "R1=V_out/I_L;",
+ "print('The value of current-setting resistor in ohms = %d'%R1)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of current-setting resistor in ohms = 5"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ }
+ ]
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-21 07:55:01 +0000