Modulation Strategy with a Minimal Number of Commutations for a Five-Level H-Bridge NPC Inverter

Modulation Strategy with a Minimal Number of Commutations for a Five-Level H-Bridge NPC Inverter

In this paper, a so-called OPTimized Pulse Width Modulation (OPT-PWM) strategy with a minimal number of commutations for a multilevel converter (MC) is proposed. The principle is based on the reduction of the number of switch commutations by removing the unnecessary ones for each voltage level trans...

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Bibliographic Details
Main Authors: Florent Becker, Ehsan Jamshidpour, Philippe Poure, Shahrokh Saadate
Format: Article
Language:English
Published: MDPI AG 2019-04-01
Series:Electronics
Subjects:
multilevel inverter
Pulse Width Modulation
minimal number of commutations
state machine
Neutral Point Clamped Converter
Online Access:https://www.mdpi.com/2079-9292/8/4/454
Description
Summary:In this paper, a so-called OPTimized Pulse Width Modulation (OPT-PWM) strategy with a minimal number of commutations for a multilevel converter (MC) is proposed. The principle is based on the reduction of the number of switch commutations by removing the unnecessary ones for each voltage level transition. The OPT-PWM strategy is applied to a five-level H-Bridge Neutral Point Clamped (HB-5L-NPC) inverter. A specific block based on a state machine is added to conventional modulation techniques to perform the transitions from a given voltage level to another one via the best trajectory with a minimal number of commutations. The principle of this additional block can be applied to any modulation technique. In this paper, the proposed strategy is validated first by simulation and then through experimental tests.
ISSN:2079-9292

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