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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Book ChapterDOI
Full-Bridge Transformerless PV Grid-Connected Inverters
Huafeng Xiao,Xiaobiao Wang +1 more
TL;DR: In this article, the authors discuss the application of Rule 1 in full-bridge TLIs, including LC elimination by only decoupling the PV arrays with the grid and clamping the potential of the freewheeling path, respectively.
Proceedings ArticleDOI
A model predictive control based zero-sequence circulating currents elimination algorithm for parallel operating three-level T-type inverters
TL;DR: A FCS-MPC based ZSCCs elimination algorithm for the modular paralleled 3LT2Is system is presented and the results validate the effectiveness of the proposed algorithm in current tracking, neutral point potentials (NPPs) balance and ZS CCs elimination.
Proceedings ArticleDOI
A new ZVZCS three-level inverter
Tianyu Chen,Mehdi Narimani +1 more
TL;DR: A new ZVZCS three-level inverter with T-type structure that can achieve ZCS on arm switches and ZVS on neutral point switches and a significant reduction in power loss dissipation is presented.
Proceedings ArticleDOI
Super Twisting Sliding-Mode Control Strategy for Three-Level Dynamic Voltage Restorers
TL;DR: In this paper, a super twisting sliding mode control (STSMC) method is introduced for single-phase three-level T-type inverter based dynamic voltage restorers, which is capable of alleviating chattering by producing a continuous-time modulation signal.
Proceedings ArticleDOI
Multilevel Single-Phase AC-DC-AC Converter Based on Packed U Cell
Jean T. Cardoso,Cursino B. Jacobina,Maxsuel Ferreira Cunha,Antonio de Paula Dias Queiroz,Samuel C. S. Junior +4 more
TL;DR: In this paper, a multilevel single-phase AC-DC-AC converter based on Packed U Cell (PUC) and shared leg is proposed, which is composed of eight IGBT switches and two dc links.
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.
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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.
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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.