Open Access Journal

ISSN : 2395-2717 (Online)

International Journal of Engineering Research in Computer Science and Engineering (IJERCSE)

Monthly Journal for Computer Science and Engineering

Open Access Journal

International Journal of Engineering Research in Electrical and Electronic Engineering(IJEREEE)

Monthly Journal for Electrical and Electronic Engineering

ISSN : 2395-2717 (Online)

Call For Paper : Vol 13, Issue 06, June 2026

Call for Paper

Volume 13, Issue 06, June 2026

Indexing

Nine Level Inverter Using Modified H Bridge Configuration

Author : N Parvathy 1 P.R Sowmiya 2 S Monisha 3

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Date of Publication :7th April 2016

Abstract: The Inverter is an electrical device which converts direct current (DC) to alternate current (AC). The inverter is used for emergency backup power in a home. Inverters can be broadly classified into single level inverter and multilevel inverter. Generally multi-level inverters are preferred because it has been confirmed through experiments that, a multi-level inverter has reduced total harmonic distortion (THD) when compared to classic inverters and they can operate at several voltage levels. Also it has been inferred that, as the number of levels in the inverter increases, the distortion is further reduced. Thus, to have a better output, multi-level inverters of higher levels are used. Depending on the requirements, the number of levels is fixed for the inverter.The objective of this project is to develop a nine level inverter using modified H-Bridge configuration to drive a AC load. There are three configurations in multi-level inverters out of which, Cascaded H-bridge configuration is chosen to implement nine-level inverter.Nine-level inverter is used in place of standard inverters in order to get a close to sine wave output. A classic inverter has two output levels. One is +Vdc and another is –Vdc. A nine level inverter has nine levels in output waveform which are +4Vdc, +3Vdc, +2Vdc, +Vdc, 0, -Vdc, -2Vdc, -3Vdc, -4Vdc. A nine-level inverter is used in practice to supply motor drives, electrical vehicle drives, DC power source utilization, etc.

Reference :

    1. Optimal Low Switching Frequency Pulse width Modulation of Nine-Level Cascade Inverter, by AmarendraEdpuganti, Student Member, IEEE, and Akshay K. Rathore, Senior Member, IEEE. Published in January, 2015
    2. Nine Level Cascaded H Bridge Inverter (For High Performing UPS Applications, P.D.H.Darmawardana, T.D.Kahingala, K.M.C.G.Karunarathna, L.B.S.N.Kularatne, J.P.Karunadasa Department of Electrical Engineering University of Moratuwa, Sri Lanka.
    3. Modified H Bridge nine level inverter with low switching frequency, M.S. USHA NANDHINI, N. VINOTHINI, R.PRAKASH, Department of EEE, VIVEKANANDHA INSTITUTE OF ENGINEERING AND TECHNOLOGY FOR WOMEN, Thiruchengode, published in IJACT

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