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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 18: Transient Behaviour"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 18.1, Page 376"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"v = 18.36 V\n"
]
}
],
"source": [
"#Initialisation\n",
"c=100*10**-6 #capacitance in farad\n",
"r=100*10**3 #resistance in ohm\n",
"v=20 #volt\n",
"t=25 #time in seconds\n",
"e=2.71828 #mathematical constant\n",
"\n",
"#Calculation\n",
"T=c*r #time in seconds\n",
"v1=v*(1-e**(-t*T**-1)) #volt\n",
"\n",
"#Result\n",
"print'v = %.2f V'%v1\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 18.2, Page 378"
]
},
{
"cell_type": "code",
"execution_count": 12,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"t = 10.2 mSec\n"
]
}
],
"source": [
"import math\n",
"\n",
"#Initialisation\n",
"l=400*10**-3 #inductance in henry\n",
"i1=300 #current in milliamp\n",
"r=20 #resistance in ohm\n",
"v=15 #volt\n",
"t=25 #time in seconds\n",
"e=2.71828 #mathematical constant\n",
"\n",
"#Calculation\n",
"T=l/r #time in seconds\n",
"i=(v*r**-1)*10**3 #current in amp\n",
"t=((math.log(i/(i-i1)))/(math.log(e)))*0.02 #expression to find time t\n",
"\n",
"#Result\n",
"print't = %.1f mSec'%(t*10**3)\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 18.3, Page 382"
]
},
{
"cell_type": "code",
"execution_count": 9,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"v = 10 - 5 e^( -t/0.2 ) V\n"
]
}
],
"source": [
"#Initialisation\n",
"c=20*10**-6 #capacitance in farad\n",
"r=10*10**3 #resistance in ohm\n",
"v=5 #volt\n",
"v2=10 #volt\n",
"\n",
"#Calculation\n",
"T=c*r #time in seconds\n",
"\n",
"#Result\n",
"print'v = %d - %d e^( -t/%.1f ) V'%(v2,v,T)"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
}
],
"metadata": {
"anaconda-cloud": {},
"kernelspec": {
"display_name": "Python [Root]",
"language": "python",
"name": "Python [Root]"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 2
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython2",
"version": "2.7.12"
}
},
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}
|
