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
Four-Channel Buck Converter in Asymmetrical Continuous Current Conduction Mode
Lilla Litvani,Janos Hamar +1 more
TL;DR: In this article, a four-channel dc/dc buck converter in the continuous current conduction mode (CCM) was studied, and the energy equations of the converter were studied and asymmetry of input voltages, output voltages and loads were examined in the CCM.
Proceedings ArticleDOI
A Non-Isolated Bidirectional Three-Phase Unfolder for Energy Storage Systems
TL;DR: In this paper , a bi-directional DC-AC converter for grid-integration of ESSs is proposed, which has the advantages of line frequency switching for the inverter stage leading to lower switching losses, reduced requirement of DC-link capacitance as well as reduced grid-side filter size.
Proceedings ArticleDOI
Model Predictive Control of Single-Phase Three-Level Inverters with Wide Inductance Variation
TL;DR: An inductance estimation algorithm was introduced to the MPC method for a single-phase three-level inverter, and better performances can be achieved for the grid current tracking and neutral point potentials (NPPs) balance control in both steady and dynamic state.
Journal ArticleDOI
Analysis of Allowable Unbalanced Load Conditions for T-Type Three-Level PWM Converter
TL;DR: This paper analyzed the maximum allowable unbalanced load conditions in the T-type three-level PWM converter and found that this result can be properly utilized for an effective design verification considering un balanced load conditions as well as a comprehensive approach for the stable system operation.
Book ChapterDOI
Advanced PWM Strategies for Complicated Topologies
TL;DR: In this article, a model predictive pulse width modulation (PWM) strategy is applied to general two-level voltage source converters (VSCs) accompanied by corresponding modulation strategies.
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.