NDLI: Flexible transformer-based multilevel inverter topologies

Content Provider	IET Digital Library
Author	Gandomi, Amin Ashraf Saeidabadi, Saeid Hosseini, Seyed Hossein Babaei, Ebrahim Gandomi, Yasser Ashraf
Abstract	Cascaded multilevel inverters (MLIs) have been proposed that utilise transformers in the basic unit. The proposed inverters primarily serve to step up the input voltages in addition to using lower number of components in comparison to traditional MLIs. In order to generate all voltage levels (even and odd) at the output, three different algorithms are proposed to determine the magnitude of DC voltage sources and transformer turn ratios. Also, the basic inverter unit was further developed and two new flexible MLI structures have been obtained. The developed structures increase the input voltage with no need for an additional boost converter. A reduction in the number of power switches, the peak inverse voltage, and the number of DC voltage sources are other advantages of the proposed topologies. Also, a simple cost model was developed and the dimensionless cost coefficient was determined. The overall cost of the proposed MLIs was compared to the similar MLIs from the literature. It was shown that the proposed MLI decrease the overall cost of the system if the cost coefficient is selected appropriately. To verify the performance of the proposed topologies simulated by the mathematical model; several lab-scale inverters were built and tested and good agreement was achieved.
Starting Page	578
Ending Page	587
Page Count	10
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 3, Mar (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5686
Journal	IET Power Electronics
Publisher Date	2018-11-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Basic Inverter Unit Boost Converter Cascaded Multilevel Inverters Cost Model DC Transformers DC Voltage Sources Dimensionless Cost Coefficient Flexible MLI Structure Flexible Transformer-based Multilevel Inverter Topology Input Voltage Invertors Lab-scale Inverter MLIs Peak Inverse Voltage Power Converter Power Electronics Power Supplies to Apparatus Power Supply Supervisory Circuit Switching Converter Transformer And Reactors Transformer Turn Ratios Voltage Level
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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