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

Monthly Journal for Electrical and Electronic Engineering

International Journal of Engineering Research in Electrical and Electronic Engineering

Volume3 ,April 2016.

Volume3,April 2016,

Topic : Nine Level Inverter Using Modified H Bridge Configuration

Authors:N Parvathy || P.R Sowmiya , S Monisha

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..

Keywords: Multi-level inverter, Total harmonic distortion, Cascaded H-bridge

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DOI: 01.1617/vol2iss4pid078

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Dr.Krzysztof Chwastek
Associate Professor,
Czestochowa University of Technology, Polland.

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ISSN(Online): 2395-2717

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Thomson Reuters ID : q-6288-2016.
ORCiD Research ID : 0000-0001-9540-6799

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Journal Code : IJEREEE
Electronic ISSN : 2395-2717
Impact Factor : 3.784
Frequency : monthly
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