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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 1: Thyristors"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 1.11_1: peak_reverse_recovery_current.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"//Example 1.11.1: peak reverse recovery current\n",
"clc;\n",
"clear;\n",
"close;\n",
"//given data :\n",
"itt=10;// time in micro seconds\n",
"qtt=150;//charge in micro colums\n",
"prrc=((2*qtt)/itt);//peak reverse recovery current in amperes\n",
"disp(prrc,'peak reverse recovery current in amperes')"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 1.18_1: voltage.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"//Example 1.18.1: voltage of the capacitor\n",
"clc;\n",
"clear;\n",
"close;\n",
"format('v',7)\n",
"r=10;//in ohms\n",
"l=10;///inductance in mH\n",
"c=10;//capacitance in micro farads\n",
"v=100;//in volts\n",
"t=((%pi)/(sqrt((1/(l*10^-3*c*10^-6))-(r^2/(4*(l*10^-3)^2)))));// time in seconds\n",
"vc= v*(1-cosd(t/(sqrt(l*10^-3*c*10^-6))));//in volts\n",
"disp(vc,'the capacitor voltage in volts is')\n",
"//answer is wrong in the textbook"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 1.18_2: voltage_of_the_capacitor.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"//Example 1.18.2: voltage of the capacitor\n",
"clc;\n",
"clear;\n",
"close;\n",
"format('v',7)\n",
"r=15;//in ohms\n",
"l=12;///inductance in mH\n",
"c=8;//capacitance in micro farads\n",
"v=100;//in volts\n",
"t=((%pi)/(sqrt((1/(l*10^-3*c*10^-6))-(r^2/(4*(l*10^-3)^2)))));// time in seconds\n",
"vc= v*(1-cosd(t/(sqrt(l*10^-3*c*10^-6))));//in volts\n",
"disp(vc,'the capacitor voltage in volts is')\n",
"//this question is not solved in the textbook"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 1.20_1: turn_off_time.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"//Example 1.20.1: Turn Off Time\n",
"clc;\n",
"clear;\n",
"close;\n",
"//given data :\n",
"format('v',6)\n",
"Vs=200;//in volts\n",
"R1=10;// in ohm\n",
"R2=R1;\n",
"C=5;// in micro-farad\n",
"Tc=(R1*C)/1.44;\n",
"disp(Tc,'The Circuit Turn Off Time,Tc(micro-sec) = ')"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 1.20_2: state_thyristor_current_and_circuit_turn_off_time.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"//Example 1.20.2: Peak Current and turn off time\n",
"clc;\n",
"clear;\n",
"close;\n",
"format('v',6)\n",
"//given data :\n",
"Vs=200;//in volts\n",
"R1=10;// in ohm\n",
"R2=R1;\n",
"Vc=200;//in volts\n",
"C=10;// in micro-farad\n",
"I1=Vs/R1;\n",
"I2=(Vs+Vc)/R2;\n",
"It1=I1+I2;\n",
"disp(It1,'Peak Current,It1(A) = ')\n",
"Tc=(R1*C)/1.44;\n",
"disp(Tc,'The Circuit Turn Off Time,Tc(micro-sec) = ')"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 1.21_1: inductance_and_capacitance.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"//Example 1.21.1: L and C\n",
"clc;\n",
"clear;\n",
"close;\n",
"//given data :\n",
"V=100;// in volts\n",
"Irm=40;// in A\n",
"tq=40;// in micro-sec\n",
"Del_t=(50/100)*tq;// in micro-sec\n",
"C=(Irm*(tq+Del_t))/V;\n",
"disp(C,'capacitance,C(micro-farad) = ')\n",
"L_min=(V/Irm)^2*C;\n",
"disp(L_min,'minimum inductance,L_min(micro-Henry) = ')\n",
"T=2.5;// assume one cycle period in ms\n",
"L_max=((0.01*(T*10^-3)^2)/(%pi^2*C*10^-6))*10^6;\n",
"disp(L_max,'Maximum inductance,L_max(micro-Henry) = ')"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Scilab",
"language": "scilab",
"name": "scilab"
},
"language_info": {
"file_extension": ".sce",
"help_links": [
{
"text": "MetaKernel Magics",
"url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
}
],
"mimetype": "text/x-octave",
"name": "scilab",
"version": "0.7.1"
}
},
"nbformat": 4,
"nbformat_minor": 0
}
|
