Comparison of Symmetrical and Asymmetrical Cascaded H-Bridge Inverter with Single DC Source

Autori

  • Prathiba T Thiagarajar College of Engineering, Madurai, Tamilnadu, India.
  • Renuga P Associate Professor, Electrical Engineering Department, Thiagarajar College of Engineering, Madurai, Tamilnadu, India.

Parole chiave:

Cascaded H-bridge multilevel inverter, fundamental frequency switching, separate DC sources, single DC source.

Abstract

This paper presents the comparison of traditional cascaded H-bridge inverter with isolated DC sources (symmetrical arrangement) and the proposed cascaded H-bridge inverter with single DC source (asymmetrical arrangement). Also, fundamental switching strategy is used to generate the control pulses. A conventional cascaded H-bridge (CHB) inverter requires ‘n’ numbers of DC sources for 2n + 1 levels. Without requiring transformers, the scheme proposed here allows the use of a single DC power source (e.g., a battery or a fuel cell stack) with the remaining (n−1) DC sources being capacitors. By maintaining unequal voltage ratios according to a geometric progression with a factor of 2 or 3 at the capacitor voltage, it is possible to obtain the more number of voltage levels with the same number of switches as in the conventional CHB inverter. It is shown that one can simultaneously maintain the DC voltage level of the capacitors and choose a fundamental switching pattern to produce a nearly sinusoidal output and the reduced total harmonic distortion (THD).

Biografie autore

  • Prathiba T, Thiagarajar College of Engineering, Madurai, Tamilnadu, India.
    Assistatnt Professor,Electrical Engineering Department,Thiagarajar College of Engineering, Madurai, Tamilnadu, India.
  • Renuga P, Associate Professor, Electrical Engineering Department, Thiagarajar College of Engineering, Madurai, Tamilnadu, India.
    Associate Professor,Electrical Engineering Department,Thiagarajar College of Engineering, Madurai, Tamilnadu, India.

Dowloads

File supplementari

Pubblicato

2012-05-04

Fascicolo

V. 2 N. 1 (2012)

Sezione

Review Articles

Licenza

Declaration and Copyright Transfer Form

(to be completed by authors)

 

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

·         I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.

·         I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).

·         I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.

·          I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. _______________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.