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"source": [
"# Chapter 12 - Power Electronic devices "
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 553 example 1"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"source resistance = 111.87 ohm\n"
]
}
],
"source": [
"from math import sqrt\n",
"slope1=130\n",
"trivol=15##volt\n",
"d=0.5##watts\n",
"ig=sqrt(d/slope1)\n",
"vg=slope1*ig\n",
"r=(trivol-vg)/ig\n",
"print \"source resistance = %0.2f\"%((r)),\"ohm\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 553 example 2"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"current = 0.010 ampere\n",
"input current less than required current\n"
]
}
],
"source": [
"from math import exp\n",
"latcur=50*10**-3##ampere\n",
"durpul=50*10**-6##second\n",
"induct=0.5##henry\n",
"r=20##ohm\n",
"voltag=100##volt\n",
"w=induct/r\n",
"inpcur=-(voltag/r)*((1)-exp(-durpul/w))\n",
"print \"current = %0.3f\"%(abs(inpcur)),\"ampere\"\n",
"print \"input current less than required current\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 554 example 3"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"min duration = 4.00e-06 second\n"
]
}
],
"source": [
"latcur=4*10**-3##ampere\n",
"induct=0.1##henry\n",
"voltag=100##volt\n",
"durmin=induct*latcur/voltag\n",
"print \"min duration = %0.2e\"%((durmin)),\"second\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 554 example 4"
]
},
{
"cell_type": "code",
"execution_count": 8,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"source resistance = 2000.00 ohm\n"
]
}
],
"source": [
"slope1=3*10**3\n",
"egs=10##volt\n",
"d=0.012##watts\n",
"ig=sqrt(d/slope1)\n",
"vg=slope1*ig\n",
"r=(egs-vg)/ig\n",
"\n",
"print \"source resistance = %0.2f\"%((r)),\"ohm\"##it is not given in the book"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 554 example 5"
]
},
{
"cell_type": "code",
"execution_count": 9,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"resistance = 14.00 ohm\n",
"frequency = 18750.00 hertz\n"
]
}
],
"source": [
"slope1=16\n",
"durmax=4*10**-6##second\n",
"curmin=500*10**-3##ampere\n",
"voltag=15##volt\n",
"#(1) resistance\n",
"vg=slope1*curmin\n",
"r=(voltag-vg)/curmin\n",
"#(2)\n",
"d=vg*curmin\n",
"freque=0.3/(d*durmax)\n",
"print \"resistance = %0.2f\"%((r)),\"ohm\"\n",
"print \"frequency = %0.2f\"%((freque)),\"hertz\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 555 example 6"
]
},
{
"cell_type": "code",
"execution_count": 10,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"change of voltage = 800.00 volt per microsecond\n"
]
}
],
"source": [
"c1=20*10**-12##farad\n",
"limcur=16*10**-3##ampere\n",
"w=(limcur/c1)*10**-6##convert second to microsecond\n",
"print \"change of voltage = %0.2f\"%((w)),\"volt per microsecond\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 555 example 7"
]
},
{
"cell_type": "code",
"execution_count": 11,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"current = 2121.32 ampere\n",
"current = 45000.00 ampere square second\n"
]
}
],
"source": [
"ratcur=3000##ampere\n",
"freque=50##hertz\n",
"i=sqrt(ratcur**2/2)\n",
"print \"current = %0.2f\"%((i)),\"ampere\"\n",
"i=((ratcur)/sqrt(2))**2/(2*freque)\n",
"print \"current = %0.2f\"%((i)),\"ampere square second\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 556 example 9"
]
},
{
"cell_type": "code",
"execution_count": 15,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"max limit resistance = 1410000.00 ohm\n",
"min limit resistance = 2650.00 ohm\n",
"resistance = 4.67e+04 ohm\n",
"rb1 = 100.00 ohm\n",
"rb2 = 653.59 ohm\n",
"peak voltage = 15.90 volt\n"
]
}
],
"source": [
"from __future__ import division\n",
"from math import log\n",
"voltag=30##volt\n",
"w=0.51\n",
"i1=10*10**-6##ampere\n",
"v1=3.5##volt\n",
"curen1=10*10**-3##ampere\n",
"freque=60##hertz\n",
"tridun=50*10**-6##second\n",
"pinvol=w*voltag+0.6\n",
"r=(voltag-pinvol)/i1\n",
"print \"max limit resistance = %0.2f\"%((r)),\"ohm\"\n",
"r=(voltag-v1)/(curen1)\n",
"print \"min limit resistance = %0.2f\"%((r)),\"ohm\"\n",
"capac1=0.5*10**-6##farad\n",
"r=(1/freque)*(1/(capac1*log(1/(1-w))))\n",
"print \"resistance = %0.2e\"%((r)),\"ohm\"\n",
"rb2=10**4/(w*voltag)\n",
"rb1=tridun/capac1\n",
"print \"rb1 = %0.2f\"%((rb1)),\"ohm\"\n",
"print \"rb2 = %0.2f\"%((rb2)),\"ohm\"\n",
"print \"peak voltage = %0.2f\"%((pinvol)),\"volt\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## PageNumber 557 example 10"
]
},
{
"cell_type": "code",
"execution_count": 16,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"voltage = 7.00 volt\n",
"this voltage makes to off\n"
]
}
],
"source": [
"re=1*10**3##ohm\n",
"i1=5*10**-3##ampere\n",
"\n",
"voltag=re*i1+2\n",
"print \"voltage = %0.2f\"%((voltag)),\"volt\"\n",
"\n",
"\n",
"print \"this voltage makes to off\""
]
}
],
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