A New Carrier-Based Pulse Width Modulation Scheme with Reduced Output Voltage Total Harmonic Distortion for Multi-Level Inverters

Abstract

This paper proposes a novel Pulse Width Modulation (PWM) switching technique based on Optimized Carrier Peaks-PWM (OCP-PWM) which can be used to control both single phase and three-phase multilevel inverters. The proposed PWM scheme is designed according to multi-peak selection on carriers a way to define the optimum values for carrier peaks and then minimizing the output voltage Total Harmonic Distortion ($TH{D}_v$), switching frequency (f_s), and also switching losses, in comparing with the other carrier-based PWM methods. To examine the performance of the presented PWM scheme, a five-level converter has been employed including six power MOSFETs to produce five level in the output. In comparison with typical PWM switching methods for single-phase inverters, the presented PWM scheme produces low harmonic components in the output voltage. To investigate the reliability of the presented PWM scheme for single-phase five-level converters a 2.5kVA/400 V prototype is carried out by applying a TMS320F28335 digital signal processor.

KEYWORDS:

• Multi-level inverter
• OCP-PWM
• PWM
• $TH{D}_v$

Additional information

Notes on contributors

Mohammadreza Noroozi

Mohammadreza Noroozi received the BSc and MSc degrees in electrical and electronic engineering from the Imam Khomeini University and Islamic Azad University, in 1998 and 2005, respectively. Currently, he is the PhD student in the electrical and electronic engineering at the Iran University of Science and Technology, Tehran, Iran. His research interests are power electronic applications. Email: [email protected]

Adib Abrishamifar

Adib Abrishamifar received his BS, MS, and PhD degrees in electronics from the Iran University of Science and Technology (IUST), Tehran, Iran, in 1989, 1992, and 2001, respectively. Since 1993, he has been with the Department of Electrical Engineering, IUST. His current research interests include analog integrated circuit design and power electronics.

Gholamali Rezaierad

Gholamali Rezaierad received the BSc degree in electrical engineering from the District of Columbia University, USA, in 1975, MSc degree in electrical engineering from the George Washington University, USA, in 1977, PhD degree in electrical engineering from the Bradford University, UK, in 1996. Since 1980, he is a faculty member of Department of Electrical Engineering at Iran University of Science and Technology, Tehran, Iran. His research interests are digital signal processing and digital image processing. Email: [email protected]