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/Chapter2_4.ipynb | 233 ------------------------------------- 1 file changed, 233 deletions(-) delete mode 100755 Power_Electronics/Chapter2_4.ipynb (limited to 'Power_Electronics/Chapter2_4.ipynb') diff --git a/Power_Electronics/Chapter2_4.ipynb b/Power_Electronics/Chapter2_4.ipynb deleted file mode 100755 index 1872c9f4..00000000 --- a/Power_Electronics/Chapter2_4.ipynb +++ /dev/null @@ -1,233 +0,0 @@ -{ - "metadata": { - "name": "" - }, - "nbformat": 3, - "nbformat_minor": 0, - "worksheets": [ - { - "cells": [ - { - "cell_type": "heading", - "level": 1, - "metadata": {}, - "source": [ - "Chapter 02 : Power Semiconductor Diodes and Transistors" - ] - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 2.1, Page No 21" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "B=40.0\n", - "R_c=10 #ohm\n", - "V_cc=130.0 #V\n", - "V_B=10.0 #V\n", - "V_CES=1.0 #V\n", - "V_BES=1.5 #V\n", - "\n", - "#Calculations\n", - "I_CS=(V_cc-V_CES)/R_c #A\n", - "I_BS=I_CS/B #A\n", - "R_B1=(V_B-V_BES)/I_BS\n", - "P_T1=V_BES*I_BS+V_CES*I_CS\n", - "ODF=5\n", - "I_B=ODF*I_BS\n", - "R_B2=(V_B-V_BES)/I_B\n", - "P_T2=V_BES*I_B+V_CES*I_CS\n", - "B_f=I_CS/I_B\n", - "\n", - "#Results\n", - "print(\"value of R_B in saturated state= %.2f ohm\" %R_B1)\n", - "print(\"Power loss in transistor=%.2f W\" %P_T1)\n", - "print(\"Value of R_B for an overdrive factor 5 = %.2f ohm\" %R_B2)\n", - "print(\"Power loss in transistor = %.2f W\" %P_T2)\n", - "print(\"Forced current gain=%.0f\" %B_f)\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "value of R_B in saturated state= 26.36 ohm\n", - "Power loss in transistor=13.38 W\n", - "Value of R_B for an overdrive factor 5 = 5.27 ohm\n", - "Power loss in transistor = 15.32 W\n", - "Forced current gain=8\n" - ] - } - ], - "prompt_number": 5 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 2.2, Page No 24" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "\n", - "#initialisation of variables\n", - "I_CEO=2*10**-3 #A\n", - "V_CC=220.0 #V\n", - "P_dt=I_CEO*V_CC #instant. power loss during delay time\n", - "t_d=.4*10**-6 #s\n", - "f=5000\n", - "P_d=f*I_CEO*V_CC*t_d #avg power loss during delay time\n", - "V_CES=2 #V\n", - "t_r=1*10**-6 #s\n", - "I_CS=80 #A\n", - "\n", - "#Calculations\n", - "P_r=f*I_CS*t_r*(V_CC/2-(V_CC-V_CES)/3) #avg power loss during rise time\n", - "t_m=V_CC*t_r/(2*(V_CC-V_CES))\n", - "P_rm=I_CS*V_CC**2/(4*(V_CC-V_CES)) #instant. power loss during rise time\n", - "\n", - "#Results\n", - "P_on=P_d+P_r \n", - "print(\"Avg power loss during turn on = %.2f W\" %P_on)\n", - "P_nt=I_CS*V_CES \n", - "print(\"Instantaneous power loss during turn on = %.0f W\" %P_nt)\n", - "t_n=50*10**-6\n", - "P_n=f*I_CS*V_CES*t_n\n", - "print(\"Avg power loss during conduction period = %.0f W\" %P_n)\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Avg power loss during turn on = 14.93 W\n", - "Instantaneous power loss during turn on = 160 W\n", - "Avg power loss during conduction period = 40 W\n" - ] - } - ], - "prompt_number": 7 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 2.3 Page No 26" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "\n", - "#initialisation of variables\n", - "I_CEO=2*10**-3 #A\n", - "V_CC=220 #V\n", - "t_d=.4*10**-6 #s\n", - "f=5000\n", - "V_CES=2 #V\n", - "t_r=1*10**-6 #s\n", - "I_CS=80 #A\n", - "t_n=50*10**-6 #s\n", - "t_0=40*10**-6 #s\n", - "t_f=3*10**-6 #s\n", - "\n", - "#Calculations\n", - "P_st=I_CS*V_CES # instant. power loss during t_s\n", - "P_s=f*I_CS*V_CES*t_f #avg power loss during t_s\n", - "P_f=f*t_f*(I_CS/6)*(V_CC-V_CES) #avg power loss during fall time\n", - "P_fm=(I_CS/4)*(V_CC-V_CES) #peak instant power dissipation\n", - "P_off=P_s+P_f\n", - "\n", - "#Results\n", - "print(\"Total avg power loss during turn off = %.2f W\" %P_off)\n", - "P_0t=I_CEO*V_CC\n", - "print(\"Instantaneous power loss during t_0 = %.2f W\" %P_0t)\n", - "P_0=f*I_CEO*V_CC*t_0 #avg power loss during t_s\n", - "P_on=14.9339 #W from previous eg\n", - "P_n=40 #W from previous eg\n", - "P_T=P_on+P_n+P_off+P_0 \n", - "print(\"Total power loss = %.2f W\" %P_T)" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Total avg power loss during turn off = 44.91 W\n", - "Instantaneous power loss during t_0 = 0.44 W\n", - "Total power loss = 99.93 W\n" - ] - } - ], - "prompt_number": 8 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 2.4, Page No 28" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#initialisation of variables\n", - "I_CS=100.0 \n", - "V_CC=200.0 \n", - "t_on=40*10**-6\n", - "\n", - "#Calculations\n", - "P_on=(I_CS/50)*10**6*t_on*(V_CC*t_on/2-(V_CC*10**6*t_on**2/(40*3))) #energy during turn on\n", - "t_off=60*10**-6\n", - "P_off=(I_CS*t_off/2-(I_CS/60)*10**6*(t_off**2)/3)*((V_CC/75)*10**6*t_off) #energy during turn off\n", - "P_t=P_on+P_off #total energy\n", - "P_avg=300.0\n", - "f=P_avg/P_t\n", - "\n", - "#Results\n", - "print(\"Allowable switching frequency = %.2f Hz\" %f)\n", - "#in book ans is: f=1123.6 Hz. The difference in results due to difference in rounding of of digits" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Allowable switching frequency = 1125.00 Hz\n" - ] - } - ], - "prompt_number": 10 - } - ], - "metadata": {} - } - ] -} \ No newline at end of file -- cgit