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diff --git a/Electric_Machinery_and_Transformers/CHAP_11.ipynb b/Electric_Machinery_and_Transformers/CHAP_11.ipynb new file mode 100755 index 00000000..3bf24fda --- /dev/null +++ b/Electric_Machinery_and_Transformers/CHAP_11.ipynb @@ -0,0 +1,243 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "CHAPTER 11: SPECIALIZED DYNAMOS"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 11.1, Page number 372"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "#Given Torque-Speed relations shown in Fig.11-3b page no-371 for a dc servomotor\n",
+ "\n",
+ "#Calculation\n",
+ "#Case(a)\n",
+ "S = 800.0 #Motor speed at point x(rpm). Extrapolating to load line point x\n",
+ "V = 60.0 #Armature voltage at point x(V)\n",
+ "#Case(b)\n",
+ "T = 4.5 #At standstill, 60 V yields 4.5 lb-ft of starting torque\n",
+ "#Case(c)\n",
+ "P_c = T*S/5252 #Power delivered to the load(hp). From case(a)\n",
+ "P_c_watt = P_c*746 #Power delivered to the load(W)\n",
+ "#Case(d)\n",
+ "T_d = 1.1 #Torque for continuous duty without cooling fan(lb-ft). At point o\n",
+ "S_d = 410.0 #Maximum load speed(rpm)\n",
+ "#Case(e)\n",
+ "T_e = 2.4 #Torque for continuous duty with cooling fan(lb-ft). At point w\n",
+ "S_e = 900.0 #Maximum load speed(rpm)\n",
+ "#Case(f)\n",
+ "P_d = T_d*S_d/5252 #Power delivered to the load(hp). From case(d)\n",
+ "P_d_watt = P_d*746 #Power delivered to the load(W)\n",
+ "#Case(g)\n",
+ "P_e = T_e*S_e/5252 #Power delivered to the load(hp). From case(e)\n",
+ "P_e_watt = P_e*746 #Power delivered to the load(W)\n",
+ "#Case(h)\n",
+ "A = 65.0 #Upper limit of power range A(W)\n",
+ "B = 305.0 #Upper limit of power range B(W)\n",
+ "\n",
+ "#Result\n",
+ "print('Case(a): Motor speed when load torque is 2.1 lb-ft at point x , S = %.f rpm' %S)\n",
+ "print(' Armature voltage when load torque is 2.1 lb-ft at point x , V = %.f V' %V)\n",
+ "print('Case(b): Motor starting torque using the voltage found in part(a) , T_st = %.1f lb-ft' %T)\n",
+ "print('Case(c): Power delivered to the load under conditions given in part(a) , P = %.3f hp = %.f W' %(P_c,P_c_watt))\n",
+ "print('Case(d): Maximum load speed for continuous duty without cooling fan , S = %.f rpm' %S_d)\n",
+ "print(' Torque for continuous duty without cooling fan , T = %.1f lb-ft' %T_d)\n",
+ "print('Case(e): Maximum load speed for continuous duty with cooling fan , S = %.f rpm' %S_e)\n",
+ "print(' Torque for continuous duty with cooling fan , T = %.1f lb-ft' %T_e)\n",
+ "print('Case(f): Power delivered to load in part(d) , P = %.4f hp = %.1f W' %(P_d,P_d_watt))\n",
+ "print('Case(g): Power delivered to load in part(e) , P = %.3f hp = %.f W' %(P_e,P_e_watt))\n",
+ "print('Case(h): Upper limit of power range , A = %.f W' %A)\n",
+ "print(' Upper limit of power range , B = %.f W' %B)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Case(a): Motor speed when load torque is 2.1 lb-ft at point x , S = 800 rpm\n",
+ " Armature voltage when load torque is 2.1 lb-ft at point x , V = 60 V\n",
+ "Case(b): Motor starting torque using the voltage found in part(a) , T_st = 4.5 lb-ft\n",
+ "Case(c): Power delivered to the load under conditions given in part(a) , P = 0.685 hp = 511 W\n",
+ "Case(d): Maximum load speed for continuous duty without cooling fan , S = 410 rpm\n",
+ " Torque for continuous duty without cooling fan , T = 1.1 lb-ft\n",
+ "Case(e): Maximum load speed for continuous duty with cooling fan , S = 900 rpm\n",
+ " Torque for continuous duty with cooling fan , T = 2.4 lb-ft\n",
+ "Case(f): Power delivered to load in part(d) , P = 0.0859 hp = 64.1 W\n",
+ "Case(g): Power delivered to load in part(e) , P = 0.411 hp = 307 W\n",
+ "Case(h): Upper limit of power range , A = 65 W\n",
+ " Upper limit of power range , B = 305 W\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 11.2, Page number 379"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "n = 3.0 #Number of stacks or phases\n",
+ "P_a = 16.0 #Number of rotor teeth\n",
+ "P_b = 24.0 #Number of rotor poles\n",
+ "\n",
+ "#Calculation\n",
+ "alpha_a = 360/(n*P_a) #Stepping angle(degree/step) \n",
+ "alpha_b = 360/(n*P_b) #Stepping angle(degree/step)\n",
+ "\n",
+ "#Result\n",
+ "print('Case(a): Stepping angle , \u03b1 = %.1f\u00b0/step' %alpha_a)\n",
+ "print('Case(b): Stepping angle , \u03b1 = %.1f\u00b0/step' %alpha_b)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Case(a): Stepping angle , \u03b1 = 7.5\u00b0/step\n",
+ "Case(b): Stepping angle , \u03b1 = 5.0\u00b0/step\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 11.3, Page number 381"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "P = 50.0 #Number of rotor teeth\n",
+ "\n",
+ "#Calculation\n",
+ "alpha = 90/P #Stepping length(degrees)\n",
+ "\n",
+ "#Result\n",
+ "print('\u03b1 = %.1f\u00b0 ' %alpha)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "\u03b1 = 1.8\u00b0 \n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 11.4, Page number 388"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "tou = 0.1 #Pole pitch of a double-sided primary LIM(m)\n",
+ "f = 60.0 #Frequency applied to the primary LIM(Hz)\n",
+ "\n",
+ "#Calculation\n",
+ "v_s = 2*f*tou #Synchronous velocity(m/s)\n",
+ "\n",
+ "#Result\n",
+ "print('Synchronous velocity , v_s = %.f m/s' %v_s)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Synchronous velocity , v_s = 12 m/s\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 11.5, Page number 388"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "v_s = 12.0 #Synchronous velocity(m/s)\n",
+ "v = 10.0 #Linear velocity of secondary sheet(m/s)\n",
+ "\n",
+ "#Calculation\n",
+ "s = (v_s-v)/v_s #Slip of the DSLIM\n",
+ "\n",
+ "#Result\n",
+ "print('Slip of the DSLIM , s = %.3f' %s)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Slip of the DSLIM , s = 0.167\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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