Induction motors are widely used in both household and industrial application due to their high torque to volume ratio, ruggedness, robustness and low maintenance. Induction motor draws a high starting current during starting period which affects on Electromagnetic Torque, Speed & Current. Traditional methods includes DOL, auto-transformer starters, star-delta starters etc, control these parameters up to certain limit. Thyristorised based switching techniques include SPWM, SV-PWM and Hysteresis band PWM also suggested, to reduced variation in parameters at start. This paper deals with starting analysis of induction motor using DOL as a traditional mechanism and sinusoidal pulse width modulation (SPWM) as a thyristorised based advanced mechanism. . Analysis is made for speed, torque and current during start. Simulations are made in MATLAB Environment and comparative results are estimated.

1. StanislavRusnok, PavelSobota, Martin Slivka, Pavel Svoboda, "Assessment Transients During Starting of Induction Motor in Matlab-Simulink And Verification by Measurement", Advanced Research in Scientific Areas December 2012, SECTION11. Electronics, Electrical Systems, Electrical Engineering 3-7-2012 P. P 1672-76. .
2. Umashankar S , Ambili Mathew , Sujyothi P, Nithya V G , Sreedevi T S,"Investigation on steady state and transient behaviourof Induction machine model under various reference frames",School of Electrical Engineering,VIT University, Vellore- 632014,Tamil Nadu,India.
3. SateanTunyasrirut, SompongSrilad and TianchaiSuksri," Comparison Power Quality of the Voltage Source Inverter type SVPWM and SPWM Technique for Induction motor Drive SICE Annual Conference 2008
4. Fan Lin, Kun Li and Yang Liu,"A Design and Implementation of Edge Controller for SPWM Waves",Proceeding of the IEEE International Conference on Information and Automation Shenzhen, China June 2011PR0001/08/0000-0241 ¥400 © 2008 SICE
5. Nakamae E, Yamashita H, Kaneda K, Ohnogi Y, Kagawa K,"Noiseless variable speed Squirrel Cage Induction Motor", IEEE Transaction of Energy Conversion, Vol. 5, No. 2, June 1990, pp. 380-385
6. Ion Boldea and Syed A. Naser,"The Induction Machine Handbook", CRC PRESS. pp8. 1-8. 7.
7. Ali Emadi,"Energy Efficient Electric Motors", Illinois Institute of Technology Chicago, Third edition MARCEL DEKKER, INC.
8. H. Austin,"Electric Motors &Drives",Third Edition 2009,An Imprint of Elsevier,pp. 198-206,267-270.
9. S. K. Pillai,"A New Course on Electrical Drives",Second Edition Aug-1988,pp 89-103.
10. Rashid M. H. , ''Power Electronics Circuits, Devices and Applications'' Third Edition, Pearson Prentice Hall, pp. 186-190.
11. Om Hari Gupta ,Dr. SatyaSheel,"Control of Induction motor drive with PSpice-MATLAB interfacing",2012 IEEE International Conference on Power Electronics, Drives and Energy Systems December16-19, 2012, Bengaluru, India.
12. RikDeDencker,DucoW. J. PulleAndroVeltman,"Advanced ElectricalDrivesAnalysisModelling,Control",2011,Springer.
13. V. Subrahmanyam "Electric Drives Concepts and Application"Fourteen Edition 2004,Tata. Mcgraw-Hill, pp 510-525.

Induction Motor Starting Analysis Dol Spwm.