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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 7:Starting And Speed Control Of Induction Motor "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.1,Page 7-6"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "x= 0.7453\n",
+      "Thus 74.53 % tapping is required\n",
+      "Ist= 3.33 IF.L\n",
+      "Thus supply starting current is 3.33 times the full load current\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "\n",
+    "#variable declaration\n",
+    "Isc=6     # starting current at rated voltage(amp)\n",
+    "Sf=5      # full load slip\n",
+    "Tfl=Tst=1 # full load torque=starting torque(N-m)\n",
+    "Ifl=1     # full load current(amp)\n",
+    "\n",
+    "#calculation\n",
+    "x=math.sqrt((Tst/Tfl) * ((float(Ifl)/float(Isc))**2)*(1/(float(Sf)/100)))\n",
+    "print 'x=',str (x)[:6]\n",
+    "print 'Thus',str(x*100)[:5],'% tapping is required'\n",
+    "\n",
+    "#Ist(supply)=x**2 * 6\n",
+    "Ist=(x**2) * Isc    # supply starting current(IF.L)\n",
+    "Ist=round(Ist,2)\n",
+    "print 'Ist=',Ist,'IF.L'\n",
+    "print 'Thus supply starting current is',Ist,'times the full load current'"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.11"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}