Design And Implementation Of A Pluse-Width Modulation (PWM) For Modular Structured Multilevel Inverter

Mohd Saifulizan , Omar (2005) Design And Implementation Of A Pluse-Width Modulation (PWM) For Modular Structured Multilevel Inverter. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Modular structured multilevel inverter is very attractive in high voltage and high power applications. The general function of this multilevel inverter is used to produce a desired sinusoidal voltage from several separate DC sources (SDCS). This inverter has a few advantages. First. by using a multilevel structure, the stress on each switching device can be reduced proportional to the number of levels of the multilevel inverter. thus the inverter can handle higher voltage without using an expensive and bulky step-up transformer in various application. Second, as the number of inverter output voltage levels is increased, harmonics content will be low enough to avoid the need of bulky filters. This project applied Alternative Phase Opposition Disposition (APOD) technique as a PWM switching strategy. A Cascaded-Inverter with Separated DC Sources (CISDCS) is selected as a topology for this multilevel inverter hardware implementation. This inverter generally use PWM switching control signals for producing an AC output voltage and generated by analogue circuit of PWM generator. The multilevel inverter is being analyzed by using MA TLAB simulation software.

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