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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 7: Polyphase Induction Machines"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.1: Finding_stator_current_and_efficiency.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Caption: Finding stator current and efficiency\n",
+"clear;\n",
+"close;\n",
+"clc;\n",
+"V_app=220/sqrt(3);//applied voltage to neutral\n",
+"I_s=127/6.75;//stator current\n",
+"pf=cos(.565);//in radians\n",
+"\n",
+"speed=120/6;// synchronous speed in r/s\n",
+"S_r=(1-.02)*speed*60;//rotor spped in r/min\n",
+"P_g=3*18.8^2*5.41;\n",
+"P=.98*5740;//internal mechanical power\n",
+"\n",
+"eff=1-830/6060;\n",
+"disp(eff,'efficiency=')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.2: Finding_internal_torque.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Caption:Finding internal torque\n",
+"clear;\n",
+"close;\n",
+"clc;\n",
+"V_a=122.3;\n",
+"I_two= V_a/sqrt(5.07^2+0.699^2);//load component of stator current\n",
+"T=3*23.9^2*4.8/125.6;//internal torque\n",
+"P=3*23^2*4.8*.97;//internal power\n",
+"\n",
+"// at maximum torque point\n",
+"s_max=0.144/0.75;\n",
+"speed=(1-s_max)*1200;//speed in r/min\n",
+"T_max=(0.5*3*122.3^2)/(125.6*(0.273+0.750));//maximum internal torque\n",
+"\n",
+"T_start=3*150.5^2*0.144/125.6;//starting torque in N-mFinding stator current and efficiency"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.3: Finding_internal_starting_torque.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Caption: Finding internal starting torque\n",
+"clear;\n",
+"close;\n",
+"clc;\n",
+"P_r=380-3*5.7^2*0.262;\n",
+"//from test 1\n",
+"Z_nl=219/(sqrt(3)*5.7);//phase Y\n",
+"R_nl=380/(3*5.7^2);\n",
+"\n",
+"//from test 2\n",
+"Z_bl=26.5/(sqrt(3)*18.57);//phase at 15 hz\n",
+"R_bl=675/(3*18.75^2)//\n",
+"\n",
+"//internal starting torque\n",
+"P_g=20100-3*83.3^2*0.262;//air gap power\n",
+"\n",
+"T_start=P_g/188.5;//starting torque in N-m"
+   ]
+   }
+],
+"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
+}