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diff --git a/sample_notebooks/Sashankkonete/Chapter1.ipynb b/sample_notebooks/Sashankkonete/Chapter1.ipynb new file mode 100755 index 00000000..75a00457 --- /dev/null +++ b/sample_notebooks/Sashankkonete/Chapter1.ipynb @@ -0,0 +1,458 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:edfd4792836df6190ed0a8d87ba87b2a1115c66d7d1cb21a33ed50c25e8f72b5"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 1 - Electric drives"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1 - pg 6"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Total annual cost in both cases\n",
+ "#Initialization of variables\n",
+ "C_g=60000.;#in Rs\n",
+ "C_id=18750*10;#in Rs\n",
+ "E_c=75000;#in kWh\n",
+ "E_a=60000;#in kWh\n",
+ "#Calculations\n",
+ "D=0.12*C_g;#in Rs\n",
+ "C_e=4*E_c;#in Rs\n",
+ "C_t=D+C_e;#in Rs\n",
+ "AD=0.15*C_id;#in Rs\n",
+ "C_ea=4*E_a;#in Rs\n",
+ "C_total=AD+C_ea;#in Rs\n",
+ "#Results\n",
+ "print 'Total annual cost in case of group drive (in Rs)=',C_t\n",
+ "print 'Total annual cost in case of individual drive (in Rs)=',C_total"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Total annual cost in case of group drive (in Rs)= 307200.0\n",
+ "Total annual cost in case of individual drive (in Rs)= 268125.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2 - pg 17"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the stable operating point\n",
+ "import math\n",
+ "#Initialization of variables\n",
+ "a=1;\n",
+ "b=1;\n",
+ "c=-30;\n",
+ "#Calculations\n",
+ "w_m=(-b+math.sqrt((b**2)-4*a*c))/(2*a);#speed of the drive\n",
+ "t_l=0.5*(w_m**2);#motoring torqe \n",
+ "#Results\n",
+ "print 'stable operating point=',w_m,t_l"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "stable operating point= 5.0 12.5\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3 - pg 18"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the power developed by the motor\n",
+ "#Initialization of variables\n",
+ "import math\n",
+ "J_m=0.4;#motor inertia(in Kg-m2)\n",
+ "J_l=10.;#load inertia(in Kg-m2)\n",
+ "a=0.1;#Teeth ratio of gear\n",
+ "i=1./a;\n",
+ "N=1400.;\n",
+ "pi=22./7.;\n",
+ "n=0.90;#efficency of motor\n",
+ "T_l=50.;#Torque(N-m)\n",
+ "#Calculations\n",
+ "J=J_m+J_l/(i**2);#Total moment of inertia referred to the motor shaft\n",
+ "T_L=T_l/(i*n);#total equivalent torque referref to motor shaft\n",
+ "P=T_L*2*pi*N/60.;#power developed by motor\n",
+ "#Results\n",
+ "print 'power developed by motor(in Watt)=',math.ceil(P)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "power developed by motor(in Watt)= 815.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 4 - pg 19"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the total torque and power developed\n",
+ "#Initialization of variables\n",
+ "import math\n",
+ "J_m=0.4;#motor inertia(in Kg-m2)\n",
+ "J_l=10;#load inertia(in Kg-m2)\n",
+ "a=0.1;#Teeth ratio of gear\n",
+ "N=1500.;\n",
+ "n_t=0.88;\n",
+ "m=600.;#weight\n",
+ "g=9.81;\n",
+ "#Calculations\n",
+ "f_r=m*g;#force\n",
+ "w_m=2*math.pi*N/60.;#motor speed\n",
+ "w=2.;#uniform speed of weight lifting\n",
+ "n=0.9;#efficency of motor\n",
+ "T_l=50;#Torque(N-m)\n",
+ "J=J_m+(a**2)*J_l+m*((w/w_m)**2);#Total moment of inertia referred to the motor shaft\n",
+ "T_L=(a*T_l/n)+f_r*w/(n_t*w_m) ;#total equivalent torque referred to motor shaft\n",
+ "p=T_L*w_m;#power developed by motor(in Watt)\n",
+ "P=p/1000.;#power developed by motor(in kWatt)\n",
+ "#Results\n",
+ "print 'Total torque referred to motor shaft(in kg-m2)=',round(J,2)\n",
+ "print 'Total equivalent Torque referred to motor shaft(in N-m)=',round(T_L,2)\n",
+ "print 'power developed by motor(in kWatt)=',round(P,2)\n",
+ "print 'The answers are a bit different from textbook due to rounding off error'"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Total torque referred to motor shaft(in kg-m2)= 0.6\n",
+ "Total equivalent Torque referred to motor shaft(in N-m)= 90.72\n",
+ "power developed by motor(in kWatt)= 14.25\n",
+ "The answers are a bit different from textbook due to rounding off error\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5 - pg 50"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Motor Speed\n",
+ "#Initialization of variables\n",
+ "import math\n",
+ "from math import ceil\n",
+ "V=220.;#in volts\n",
+ "V_1=200.;#in volts\n",
+ "N=1000.;#in rpm\n",
+ "I=100.;#in amperes\n",
+ "R_a=0.1;#in ohms\n",
+ "#Calculations\n",
+ "E_b=V-I*R_a;#in volts\n",
+ "I_1=I;#in amperes\n",
+ "E_b1=V_1-I_1*R_a;#in volts\n",
+ "N_1=N*E_b1/E_b;\n",
+ "#Results\n",
+ "print 'Motor Speed (in rpm)=',ceil(N_1)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Motor Speed (in rpm)= 905.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 6 - pg 50"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the full load Speed and Torque\n",
+ "#Initialization of variables\n",
+ "import math\n",
+ "from math import ceil\n",
+ "V=230;#in volts\n",
+ "R_sh=230;#in ohms\n",
+ "R_a=0.5;#in ohms\n",
+ "I_sh=V/R_sh;#in amperes\n",
+ "#Calculations\n",
+ "I_lo=3;#in amperes\n",
+ "I_ao=I_lo-I_sh;#in amperes\n",
+ "E_bo=V-I_ao*R_a;#in volts\n",
+ "N_o=1000;#in rpm\n",
+ "I_lf=23;#in amperes\n",
+ "I_af=I_lf-I_sh;#in amperes\n",
+ "E_bf=V-I_af*R_a;#in volts\n",
+ "Phy_ratio=0.98;\n",
+ "N_f=N_o*(E_bf/E_bo)/Phy_ratio;\n",
+ "T_f=9.55*E_bf*I_af/N_f;\n",
+ "#Results\n",
+ "print 'Full Load Speed (in rpm)=',ceil(N_f)\n",
+ "print 'Full load Torque (in Newton-meter)=',round(T_f,2)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Full Load Speed (in rpm)= 976.0\n",
+ "Full load Torque (in Newton-meter)= 47.15\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7 - pg 51"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Armature voltage drop at full load\n",
+ "#Initialization of variables\n",
+ "V=440.;#in volts\n",
+ "N_o=2000.;#in rpm\n",
+ "E_bo=440.;#in volts\n",
+ "N_f=1000.;#in rpm\n",
+ "N_h=1050.;#in rpm\n",
+ "#Calculations\n",
+ "E_bf=E_bo*N_f/N_o#in volts\n",
+ "E_b=E_bo*N_h/N_o;#in volts\n",
+ "v=(E_b-E_bf)*2;\n",
+ "#Results\n",
+ "print 'Armature voltage drop at full load (in volts)=',v"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Armature voltage drop at full load (in volts)= 22.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8 - pg 51"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Speed\n",
+ "#Initialization of variables\n",
+ "V=230.;#in volts\n",
+ "N1=750.;#in rpm\n",
+ "R=10.;#in ohms\n",
+ "I_a=30.;#in amperes\n",
+ "#Calculations\n",
+ "N2=N1*((V+I_a*R)/V)**-1;\n",
+ "#Results\n",
+ "print'Speed (in rpm)=',int(N2)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Speed (in rpm)= 325\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 9 - pg 52"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Speed in both cases\n",
+ "import math\n",
+ "from math import ceil\n",
+ "#Initialization of variables\n",
+ "V=200.;#in volts\n",
+ "I_1=20.#in amperes\n",
+ "R_a=0.5;#in ohms\n",
+ "#Calculations\n",
+ "E_b1=V-I_1*R_a;#in volts\n",
+ "N1=700;#in rpm\n",
+ "I_2=math.sqrt(1.44)*I_1;#in amperes\n",
+ "E_b2=V-I_2*R_a;#in volts\n",
+ "N2=N1*(E_b2/E_b1)*(I_1/I_2);\n",
+ "I_3=10;#in amperes\n",
+ "E_b3=V-I_3*R_a;#in volts\n",
+ "N3=N1*(E_b3/E_b1)*(I_1/I_3);\n",
+ "#Results\n",
+ "print '(a) Speed (in rpm)=',round(N2,1)\n",
+ "print '(b) Speed (in rpm)=',ceil(N3)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) Speed (in rpm)= 577.2\n",
+ "(b) Speed (in rpm)= 1437.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10 - pg 52"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Torque and Speed\n",
+ "#Initialization of variables\n",
+ "import math\n",
+ "from math import ceil\n",
+ "V=230.;#in volts\n",
+ "I_1=90.;#in amperes\n",
+ "R_a=0.08;#in ohms\n",
+ "R_se=0.05;#in ohms\n",
+ "E_2=180.;#in volts\n",
+ "N2=700.;#in rpm\n",
+ "R=1.5;#in ohms\n",
+ "#Calculations\n",
+ "R_m=R_a+R_se;#in ohms\n",
+ "E_b1=V-I_1*(R_m+R);#in volts\n",
+ "N1=N2*(E_b1/E_2);\n",
+ "T=9.55*E_b1*I_1/N1;\n",
+ "#Results\n",
+ "print 'Speed (in rpm)=',ceil(N1)\n",
+ "print 'Torque (in Newton-meter)=',round(T,0)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Speed (in rpm)= 324.0\n",
+ "Torque (in Newton-meter)= 221.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |