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
Novel three-level T-type isolated bidirectional DC–DC converter
TL;DR: In this article, a three-level T-type isolated bidirectional DC-DC converter (3LTT-IBDC) was proposed for the power transfer in the form of an isolation transformer.
Proceedings ArticleDOI
Modular Three-level T-type Power Electronics Building Block for Aircraft Electric-Propulsion Drives
TL;DR: The design and development of a modular power electronics building block (PEBB) in a dc-ac three-level t-type single phase-leg topology is presented and a non-trivial design of an aluminum-based multilayer laminated busbar was the primary focus of the work.
Journal ArticleDOI
Performance Comparison Between Two-Level and Three-Level SiC-Based VFD Applications With Output Filters
TL;DR: In this paper, the authors compared the efficiency, the motor terminal voltage quality (dv/dt ), and the common mode current of the SiC-based variable frequency drives (VFDs) according to the inverter topologies with and without the output filters.
Journal ArticleDOI
A New Five-level Single-phase Inverter Employing a Space Vector Current Control
TL;DR: In this paper, a new five-level single-phase voltage source inverter was introduced, which employs two bidirectional switches and a novel space vector current control strategy was employed to maintain the desired number of voltage levels based on load current.
Proceedings ArticleDOI
A Five-Level Common-Ground-T-Type Inverter for Solar Photovoltaic Applications
TL;DR: The newly established common-ground-T-type (CGT-type) inverter is a single-stage topology restructured from the combination of a classical T-type inverter and a front-end three-level boost converter that can effectively eliminate the common mode voltage issue, prevent leakage currents, and ensure a continuous input current in PV systems.
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.