Phase-shifted Discontinuous Pulse-Width Modulation Methods for Multi-level Inverters Operated in Over-modulation Range

Abstract

This article presents combinations of the generic phase-shifted pulse-width modulation method with conventional discontinuous pulse-width modulation methods operated in the over-modulation range. The treated discontinuous methods are the third harmonic injection, Depenbrock's DPWM1, and Ogasawara's DPWM2. The significant advantage of the present approach over the conventional phase disposition pulse-width modulation method is the equal power flow between the H-bridges and the improved distribution of the switching operations number between them. Furthermore, they provide improved linearity in the over-modulation range. The proposed pulse-width modulation methods are analyzed by extensive simulation results. Several aspects, such as the total harmonic distortion factor of the inverter output currents and voltages, harmonic content, frequency spectrum distribution, and switchings number, are studied.

Keywords:

• discontinuous pulse-width modulation
• multi-level inverter
• third harmonic injection
• DPWM1
• DPWM2
• over-modulation

Additional information

Notes on contributors

Dmitry Baimel

Dmitry Baimel received Ph.D degree in Electrical and Computer Engineering from Ben-Gurion University, Beer-Sheva, Israel in 2013. Since 2013 till present he is lecturer in Sami Shamoon College of Engineering, Department of Electrical and Electronics Engineering Beer-Sheva, Israel. His research interests include DC-DC, AC-DC converters, power electronics and energy conversion.

Raul Rabinovici

Raul Rabinovici was born in Romania in 1950. He graduated as an electrical engineer from The Polytechnic Institute of Jassy, Romania, and received the Ph.D. degree in Electrical Engineering from Ben-Gurion University of The Negev, Beer-Sheva, Israel, in 1972 and 1987, respectively. He is currently an Associate Professor with the Department of Electrical and Computer Engineering, Ben-Gurion University of The Negev. Prof. Rabinovici was a member of the Editorial Board of the IEEE TRANSACTIONS ON MAGNETICS since 1996 till 1998. Prof. Rabinovici has supervised 48 graduate students. He published more than 150 papers in journals and conference proceedings. His principal field of interest has been electric drives, including electric machines, power electronic drivers, DSP operation, and control algorithms.

Saad Tapuchi

Saad Tapuchi has received Ph.D degree in nuclear engineering in 1988 from Ben-Gurion University, Beer-Sheva, Israel. Between the years 2002-2011 he was a senior lecturer in the Sami Shamoon College of Engineering, Department of Electrical and Electronics engineering Beer-Sheva, Israel. Since 2011 he is Associate Professor in Sami Shamoon College. Since 2006 he is a dean of Electrical Engineering Faculty in Sami Shamoon College of Engineering. His present research concentrates in power electronics, energy conversion and magnetics.

Nina Baimel

Nina Baimel received Ph.D in Computer Engineering from D. Mendeleyev, University of Chemical Technology of Russia. Since 2000 she is a lecturer in Sapir, Academic College, Department Computer Science, Sderot, Israel. Her research interests include mathematical modeling and optimization of a liquid phase change material.