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Diffstat (limited to '_Power_Electronics/Chapter2_2.ipynb')
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1 files changed, 0 insertions, 233 deletions
diff --git a/_Power_Electronics/Chapter2_2.ipynb b/_Power_Electronics/Chapter2_2.ipynb deleted file mode 100755 index 1872c9f4..00000000 --- a/_Power_Electronics/Chapter2_2.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": {}
- }
- ]
-}
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