From aaca841f42f4e5aaf626aca7e2b3bec7edf0c74e Mon Sep 17 00:00:00 2001 From: Trupti Kini Date: Wed, 30 Nov 2016 23:31:02 +0600 Subject: Added(A)/Deleted(D) following books A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter40.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter41.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter43.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter44.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter45.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter46.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter47.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter49.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter50.ipynb A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/screenshots/figure_1.png A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/screenshots/figure_2.png A A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/screenshots/figure_3.png --- .../chapter46.ipynb | 95 ++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter46.ipynb (limited to 'A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter46.ipynb') diff --git a/A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter46.ipynb b/A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter46.ipynb new file mode 100644 index 00000000..68e70d63 --- /dev/null +++ b/A_TEXTBOOK_OF_ELECTRICAL_TECHNOLOGY_(VOL-III)_by_B.L.Thareja/chapter46.ipynb @@ -0,0 +1,95 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# CHAPTER 46 : ELECTRONIC CONTROL OF A.C MOTORS" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## EXAMPLE 46.1 , PAGE NO :- 1827" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Ton = 1.89 ms.\n", + "magnitude of the current pulse I0 = 102.31 A.\n" + ] + } + ], + "source": [ + "'''The wound-rotor induction motor of Fig.43.5 is rated at 30-kW,975 rpm,440-V,50 Hz.The open-circuit line voltage is 400V and the load\n", + "resistance is 0.5 ohm.If chopper frequency is 200 Hz,calculate Ton so that the motor develops a gross torque of 200 N-m at 750 rpm.Also,\n", + "calculate the magnitude of the current pulses drawn from the capacitor.'''\n", + "\n", + "import math as m\n", + "Ns = 1000.0 #rpm (Synchronus speed)\n", + "N1 = 750.0 #rpm (rotating speed)\n", + "E2 = 400.0 #V (OC line voltage)\n", + "Tg = 200.0 #N-m (gross torque)\n", + "R0 = 0.5 #ohm (load resistance)\n", + "f = 200.0 #Hz (chopper frequency)\n", + "s = (Ns-N1)/Ns # slip\n", + "Vrl = s*E2 #V (rotor line voltage)\n", + "Vdc = 135.0 #V (DC voltage of 3-phase bridge rectifier)\n", + "#Now, Tg = P^2/(2*3.14*Ns).Therefore,\n", + "P2 = Tg*2*3.14*Ns/60 #W\n", + "#Power dissipated as heat\n", + "sP2 = s*P2 #W\n", + "#Power is actually dissipated in R and is equal to rectifier output Vdc*Idc.Therefore,\n", + "Idc = sP2/Vdc #A\n", + "#The apparent resistance at the input of chopper is\n", + "Ra = Vdc/Idc #ohm\n", + "#Now, Ra = Ro/(f*Ton)^2 .Therefore,\n", + "Ton = m.sqrt(R0/(f*f*Ra))*1000 #ms\n", + "#Current in R0 can be found from relation,I0^2*R0 = sP2\n", + "I0 = m.sqrt(sP2/R0) #A\n", + "print \"Ton = \",round(Ton,2),\"ms.\"\n", + "print \"magnitude of the current pulse I0 =\",round(I0,2),\"A.\"" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], + "source": [] + } + ], + "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 +} -- cgit