Journal ArticleDOI
A Survey on Neutral-Point-Clamped Inverters
TLDR
The basic operation and the most used modulation and control techniques developed to date of neutral-point-clamped inverters are presented and some technological problems such as capacitor balance and losses are presented.Abstract:
Neutral-point-clamped (NPC) inverters are the most widely used topology of multilevel inverters in high-power applications (several megawatts). This paper presents in a very simple way the basic operation and the most used modulation and control techniques developed to date. Special attention is paid to the loss distribution in semiconductors, and an active NPC inverter is presented to overcome this problem. This paper discusses the main fields of application and presents some technological problems such as capacitor balance and losses.read more
Citations
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Journal ArticleDOI
Simple Neutral-Point Voltage Control for Three-Level Inverters Using a Discontinuous Pulse Width Modulation
TL;DR: In this article, the authors proposed a neutral-point voltage balancing method for a three-level inverter that uses discontinuous pulse width modulation (DPWM), which maintains low switching losses and achieves the effective voltage balancing.
Journal ArticleDOI
Neutral-Point Potential Balancing of a Five-Level Active Neutral-Point-Clamped Inverter
TL;DR: It is demonstrated that the NP potential can be naturally balanced under ideal and steady conditions and an NP potential balancing method based on zero-sequence voltage injection is presented.
Journal ArticleDOI
New Modulation Strategy to Balance the Neutral-Point Voltage for Three-Level Neutral-Clamped Inverter Systems
TL;DR: In this article, a modulation strategy that balances the neutral-point voltage for three-level neutral-clamped inverter systems is proposed, which replaces the P-type or N-type small switching states with other switching states that do not affect the neutral point voltage.
Journal ArticleDOI
Cascaded Multilevel Converters: Optimal Asymmetries and Floating Capacitor Control
Javier Pereda,Juan Dixon +1 more
TL;DR: The authors propose to improve any CM topology through two solutions: use optimal voltage asymmetries (ratios), higher than conventional ones; replace the voltage sources by floating capacitors balanced with a new control and/or a high-frequency link.
Journal ArticleDOI
A Hybrid PWM Applied to High-Power Three-Level Inverter-Fed Induction-Motor Drives
TL;DR: A hybrid pulsewidth modulation (PWM), combining the merits of both space-vector PWM and selective harmonic elimination (SHE) PWM (SHEPWM), is proposed for three-level neutral-point-clamped (NPC) inverter-fed high-power adjustable-speed drives, which uses asynchronous SVPWM at low frequency and SHEPWM at high frequency.
References
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Journal ArticleDOI
Multilevel inverters: a survey of topologies, controls, and applications
TL;DR: The most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-Clamped (flying capacitor), and cascaded multicell with separate DC sources are presented and the circuit topology options are presented.
A New Neutral-Point-Clamped PWM Inverter
TL;DR: In this article, a neutral-point-clamped PWM inverter composed of main switching devices which operate as switches for PWM and auxiliary switching devices to clamp the output terminal potential to the neutral point potential has been developed.
Journal ArticleDOI
A New Neutral-Point-Clamped PWM Inverter
TL;DR: The neutral-point-clamped PWM inverter adopting the new PWM technique shows an excellent drive system efficiency, including motor efficiency, and is appropriate for a wide-range variable-speed drive system.
Journal ArticleDOI
Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives
TL;DR: This paper covers the high-power voltage-source inverter and the most used multilevel-inverter topologies, including the neutral-point-clamped, cascaded H-bridge, and flying-capacitor converters.
Journal ArticleDOI
Pulsewidth modulation-a survey
TL;DR: The author provides a guideline and quick reference for the practicing engineer to decide which methods should be considered for an application of a given power level, switching frequency, and dynamic response.