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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 5:Rating and Heating of Motors"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Ex5.1:pg-491"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "43.606211467  is The final temperature in deg\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Electric Drives:concepts and applications by V.subrahmanyam\n",
+    "#Example:5.1\n",
+    "import math\n",
+    " \n",
+    "theta1=60;#Temperature rise of motor in degree\n",
+    "theta2=40.0;#Temperature rise of motor in degree\n",
+    "e=0.5;#exponential value\n",
+    "I1=110.0;#current in A\n",
+    "I2=125;#current in A\n",
+    "t1=4;#Time in hour\n",
+    "t2=8;#Time in hour\n",
+    "theta=theta1/theta2;\n",
+    "tough=-(1/math.log(0.5));\n",
+    "thetam1=theta2/e;\n",
+    "thetam2=thetam1*(I2/I1)**2;\n",
+    "x=t1/(theta1*tough);\n",
+    "a=math.e**-x;\n",
+    "y=t2/(theta1*tough);\n",
+    "b=math.e**-y;\n",
+    "thetam=I2*((1-a)/(1-(a*b)));\n",
+    "print thetam,\" is The final temperature in deg\"\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Ex5.2:pg-492"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1.23972921698  is The permissible overloading \n"
+     ]
+    }
+   ],
+   "source": [
+    "#Electric Drives:concepts and applications by V.subrahmanyam\n",
+    "#Publisher:Tata McGraw-Hill \n",
+    "#Edition:Second \n",
+    "#Ex5_2\n",
+    "import math\n",
+    " \n",
+    "T=100.0;#Temperature rise of motor in degree\n",
+    "t1=2;#Time in hour\n",
+    "t2=1.5;#Time in hour\n",
+    "Alpha=0.5;#Angle in rad\n",
+    "e=math.e**(-t1/t2);\n",
+    "thetam=100.0/(1-e);\n",
+    "t=thetam/T;\n",
+    "x=math.sqrt((t*(Alpha+1))-Alpha);\n",
+    "print x,\" is The permissible overloading \"\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Ex5.3:pg-493"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1.071304005 is The permissible overloading of the motor \n"
+     ]
+    }
+   ],
+   "source": [
+    "#Electric Drives:concepts and applications by V.subrahmanyam\n",
+    "#Publisher:Tata McGraw-Hill \n",
+    "#Edition:Second \n",
+    "#Ex5_3\n",
+    "import math\n",
+    " \n",
+    "Alpha=0.4;#Angle in rad\n",
+    "T1=100;#Temperature rise of motor in degree\n",
+    "T2=150.0;#Temperature rise of motor in degree\n",
+    "P=125.0;#Power in KW\n",
+    "t1=15;#Time in hour\n",
+    "t2=30.0;#Time in hour\n",
+    "x=-t1/T1;\n",
+    "a=math.e**x;\n",
+    "y=-t2/T2;\n",
+    "b=math.e**y;\n",
+    "p=math.sqrt(((Alpha+1)*(1-(a*b)))/(1-a)-Alpha);\n",
+    "print p,\"is The permissible overloading of the motor \"\n",
+    "\n"
+   ]
+  }
+ ],
+ "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
+}