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A Three-Phase Symmetrical DC-Link Multilevel Inverter with Reduced Number of DC Sources

Lookup NU author(s): Dr Mohamed Dahidah



This is the authors' accepted manuscript of an article that has been published in its final definitive form by IEEE, 2018.

For re-use rights please refer to the publisher's terms and conditions.


This paper presents a novel three-phase DC-link multilevel inverter topology with reduced number of input DC power supplies. The proposed inverter consists of series-connected half-bridge modules to generate the multilevel waveform and a simple H-bridge module, acting as a polarity generator. The inverter output voltage is transferred to the load through a three-phase transformer, which facilitates a galvanic isolation between the inverter and the load. The proposed topology features many advantages when compared with the conventional multilevel inverters proposed in the literatures. These features include scalability, simple control, reduced number of DC voltage sources and less devices count. A simple sinusoidal pulse-width modulation technique is employed to control the proposed inverter. The performance of the inverter is evaluated under different loading conditions and a comparison with some existing topologies is also presented. The feasibility and effectiveness of the proposed inverter are confirmed through simulation and experimental studies using a scaled down low-voltage laboratory prototype.

Publication metadata

Author(s): Md Mubashwar Hasan, Abu-Siada A, Dahidah MSA

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Power Electronics

Year: 2018

Volume: 33

Issue: 10

Pages: 8331-8340

Print publication date: 01/10/2018

Online publication date: 07/12/2017

Acceptance date: 29/11/2017

Date deposited: 07/12/2017

ISSN (print): 0885-8993

ISSN (electronic): 1941-0107

Publisher: IEEE


DOI: 10.1109/TPEL.2017.2780849


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