N. Srinivasa reddy, K. Sudha Krishna, D. Yasin, G. Pulisekhar, S. Venkat Rami Reddy, P.S. Praveen kumar, K. Jagadeesh, G. Pullaiah College of Engineering and Technology, Kurnool, India.
DOI : 01.0401/ijaict.2016.11.07
International Journal of Advanced Information and Communication Technology
Received On : April 10, 2019
Revised On : May 22, 2019
Accepted On : June 12, 2019
Published On : July 05, 2019
Volume 06, Issue 07
Pages : 1103-1107
Abstract
Normally, high power voltage source inverters are very common in industry and they need to provide sinusoidal output to the load for proficient operation. Sinusoidal wave output can be obtained in inverters by adopting various modulation techniques, which increases the switching frequency of the inverter elements like IGBTs and Power MOSFETs ( ), which are having limited power handling capabilities. In case of moderate to high power output from the inverter, SCRs or GTOs need to be used as inverter switching elements. These devices are having limited switching frequencies making the inverter operation impossible using the high frequency modulation techniques. This results in an output with rich harmonic content. The latest multilevel inverters can be used to overcome these problems. But the circuits very complex and also requires isolated power supplies to feed the inverter. In the proposed project, a low frequency square wave inverter using SCRs is operated along with a series connected pulse width modulated inverter, in each phase is designed. The 3-phase SCR inverter basically works as a voltage source inverter producing square wave output. The series compensator used in each phase produce only the desired harmonic voltages to make the net output voltage sinusoidal, with small PWM switching harmonics only. The series compensators are designed using the IGBTs, forming abridge inverter configuration.
Keywords
AC Motor Drives, Power Conversion, Power Conversion Harmonics
Cite this article
N. Srinivasa reddy, K. Sudha Krishna, D. Yasin, G. Pulisekhar, S. Venkat Rami Reddy, P.S. Praveen kumar, K. Jagadeesh, “Elimination of Natural Harmonics in Square Wave Inverter” INTERNATIONAL JOURNAL OF ADVANCED INFORMATION AND COMMUNICATION TECHNOLOGY, pp.1103-1107, July 05, 2019.
Copyright
© 2019 N. Srinivasa reddy, K. Sudha Krishna, D. Yasin, G. Pulisekhar, S. Venkat Rami Reddy, P.S. Praveen kumar, K. Jagadeesh. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.