Journal ArticleDOI
Design and Implementation of a Highly Efficient Three-Level T-Type Converter for Low-Voltage Applications
Mario Schweizer,Johann W. Kolar +1 more
TLDR
The 3LT2C as mentioned in this paper combines the positive aspects of the two-level converter such as low conduction losses, small part count and a simple operation principle with the advantages of the three-level converters such as the low switching losses and superior output voltage quality.Abstract:
The demand for lightweight converters with high control performance and low acoustic noise led to an increase in switching frequencies of hard switched two-level low-voltage 3-phase converters over the last years. For high switching frequencies, converter efficiency suffers and can be kept high only by employing cost intensive switch technology such as SiC diodes or CoolMOS switches; therefore, conventional IGBT technology still prevails. In this paper, the alternative of using three-level converters for low-voltage applications is addressed. The performance and the competitiveness of the three-level T-type converter (3LT2C) is analyzed in detail and underlined with a hardware prototype. The 3LT2 C basically combines the positive aspects of the two-level converter such as low conduction losses, small part count and a simple operation principle with the advantages of the three-level converter such as low switching losses and superior output voltage quality. It is, therefore, considered to be a real alternative to two-level converters for certain low-voltage applications.read more
Citations
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Proceedings ArticleDOI
AT-NPC 3-Level Inverter-Fed Induction Motor Vector Control With Neutral Point Voltage Control
TL;DR: This research introduces a control method to keep the neutral point voltage of the smoothing capacitor, and compares and discusses the simulation results and experiment results when the induction motor is vector controlled by the 3-level inverter.
Proceedings ArticleDOI
Power Loss Analysis of Advanced-Neutral-Point-Clamped Converter with SiC MOSFETs and Si IGBTs
Jakub Stefanik,M. Zygmanowski +1 more
TL;DR: In this article, the authors evaluated the performance of an advanced neutral point-clamped (ANPC) converter with two SiC MOSFETs and four Si IGBTs per a single phase leg.
Proceedings ArticleDOI
Research on restraint strategy of narrow pulses of three-level inverter
Shuguang Wei,Minyu Li +1 more
TL;DR: In the area of narrow pulses, the sequence and the number of space vector is optimized to avoid narrow pulses according to the basic principle of space vectors assignment.
Proceedings ArticleDOI
Fault Tolerant Operation of Three-Phase 3 Level T-Type qZS Inverters using Sliding Mode Current Controllers
V. Fernao Pires,Daniel Foito,Natalia M.R. Santos,Armando Cordeiro,Carlos Roncero-Clemente,José Fernando Silva +5 more
TL;DR: This paper focuses on the development of a control system to operate a three-phase three-level T-Type qZSI under fault tolerant conditions, based on a sliding mode current controller associated to a vectorial modulator selecting the available outputs.
Journal ArticleDOI
Modulation Coordinated Voltage Balance Strategy for a Dual-T-Type Modular Multilevel Converter
TL;DR: In this article , a dual-T-type modular multilevel converter (TMMC) composed of stackable ac-dc-ac power cells is presented, where each cell is constructed by two high-frequency T-type legs and one line-frequency switched common leg.
References
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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
Recent Advances and Industrial Applications of Multilevel Converters
Samir Kouro,Mariusz Malinowski,K. Gopakumar,Josep Pou,Leopoldo G. Franquelo,Bin Wu,Jose Rodriguez,Marcelo A. Perez,Jose I. Leon +8 more
TL;DR: This paper first presents a brief overview of well-established multilevel converters strongly oriented to their current state in industrial applications to then center the discussion on the new converters that have made their way into the industry.
Journal ArticleDOI
The active NPC converter and its loss-balancing control
T. Bruckner,S. Bernet,H. Guldner +2 more
TL;DR: A loss-balancing scheme is introduced, enabling a substantially increased output power and an improved performance at zero speed, compared to the conventional NPC VSC.
Journal ArticleDOI
Influence of the modulation method on the conduction and switching losses of a PWM converter system
TL;DR: In this paper, the authors explore the dependency of the conduction losses of a bridge leg of a PWM power converter system with a high pulse rate on the shape of the phase modulation functions.