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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Journal ArticleDOI
A Cascaded Nine-Level Inverter Topology With T-Type and H-Bridge With Increased DC-Bus Utilization
Souradeep Pal,Mriganka Ghosh Majumder,Rakesh R,K. Gopakumar,Loganathan Umanand,Dariusz Zieliński,Abdul R. Beig +6 more
TL;DR: In this article, a hybrid nine-level inverter topology with extended dc-bus utilization for operation at over modulation range without the presence of lower order harmonics (predominantly fifth and seventh) was introduced.
Journal ArticleDOI
Circulating Current Suppression for Parallel Three-Level Inverters Under Unbalanced Operating Conditions
TL;DR: A hybrid control scheme is developed to suppress the circulating current for parallel 3LT2Is under unbalanced operating conditions by real-time adjusting dwell times of small vectors in space vector modulation technique.
Journal ArticleDOI
Improved Particle Swarm Optimization Based Selective Harmonic Elimination and Neutral Point Balance Control for Three-Level Inverter in Low-Voltage Ride-Through Operation
TL;DR: A SHEPWM scheme is proposed, which is on the basis of an improved particle swarm optimization (IPSO) algorithm to solve the harmonic elimination equations and an enhanced NP balance control method in LVRT operation.
Journal ArticleDOI
A Virtual Space Vector-Based Model Predictive Control for Inherent DC-Link Voltage Balancing of Three-Level T-Type Converters
TL;DR: This article proposes a new FCS-MPC, which only uses voltage vectors and virtual voltage vectors that do not affect the neutral-point voltage of the VSC dc link, such that an inherent dc-link voltage balancing can be achieved.
Journal ArticleDOI
A New Approach for Power Losses Evaluation of IGBT/Diode Module
Hossein Hafezi,Roberto Faranda +1 more
TL;DR: This paper evaluates existing methods and proposes new loss calculation methods for power electronics losses that can be used within simulation tools at any converter configuration and application range, splitting power electronic losses into switching and conduction losses.
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.