Results 131 to 140 of about 490 (182)
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Multilevel Circuit Topologies Based on the Switched-Capacitor Converter and Diode-Clamped Converter
IEEE Transactions on Power Electronics, 2011The novel multilevel circuit topologies are proposed in this paper. They are called multilevel circuit topologies based on switched-capacitor and diode-clamped converters (MCT-BSD). The topology structure and the operation principle, including the working states' transitions of the diode-clamped part, the voltages balancing mechanism of the dc link ...
Xiangning He, Rongxiang Zhao
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Topology and Modulation for a New Multilevel Diode-Clamped Matrix Converter
IEEE Transactions on Power Electronics, 2014To expand the matrix converter application in high power area, a new three-level diode-clamped matrix converter topology as well as a related multicarrier-based modulation scheme is proposed. The topology inherits the features from the conventional multilevel inverter and the indirect matrix converter, which is composed of a cascaded-rectifier and a ...
Mei Su, Hanbing Dan, Yao Sun
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An Accurate Model for the DC-Side Voltage Control of the Neutral Point Diode Clamped Converter
IEEE Transactions on Power Delivery, 2006This paper presents an in depth analysis to show that the conventional power balance model for the dc-side control of the Neutral Point Diode Clamped (NPC) converter is not adequately accurate for all operating conditions. The inaccuracy is due to the fact that the instantaneous power of the ac-side inductors is assumed to be negligible in the power ...
Amirnaser Yazdani, R Iravani
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A Novel Inductor Based Balancing Circuit for Diode Clamped Converters
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018The paper proposes a new balancing circuit for multilevel diode clamped converters (DCC) aimed to keep the DC-Link voltages balanced, regardless of the converter operating condition. The proposed architecture, which is based on the same topology of a DCC leg, is connected to an external inductor and is driven by a specialized modulation technique ...
Brando G., Cervone A.
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A new diode-clamp cascade multilevel converter
IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468), 2004Cascade and diode-clamp voltage source converter have become increasingly popular in recent years due to their practicability. This paper will present a new diode-clamp cascade multilevel converter that is derived from these two topologies. The new concept of the novel diode-clamp cascade converter is based on the connection of multiple three-level ...
null Kai Ding +4 more
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A Sparse Multilevel Matrix Converter Based on Diode-Clamped Topology
2007 IEEE Industry Applications Annual Meeting, 2007This paper presents a novel sparse matrix converter configuration that needs no bulky energy storage capacitors or inductors, and employs only unidirectional power semiconductor switches. The source side bridge is switched at the line frequency and therefore, this allows the use of the low speed high power rating switches.
Sayed Ali Khajehoddin +2 more
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Snubber circuit for diode-clamped four-levelinverter and converter
IEE Proceedings - Electric Power Applications, 2001The snubber circuit makes use of Undeland and McMurray snubbers in the basic snubber unit, and can be regarded as a generalised combined Undeland and McMurray snubber. The proposed snubber features fewer components, improved efficiency due to low snubber loss, overvoltage clamping across main switching devices, and no imbalance problem of the blocking ...
I.-D. Kim, E.-C. Nho, J.-S. Ko
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Voltage-balancing strategies for diode-clamped multilevel converters
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004This paper explores space-vector modulation strategies for diode-clamped multilevel converters. The analysis is focused on the voltage-balancing issue, since this is a very difficult task in high-order multilevel converters. Two strategies for selecting redundant vectors in the space-vector diagram are explained; both of them are based on minimizing a ...
J. Pou +4 more
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A Simplified Virtual Vector PWM for Four-Level Diode-Clamped Converter
IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019The inherent problem of dc-link capacitor voltage imbalance in multilevel diode-clamped converters limits their development and industrial applications. By using conventional space vector PWM (CSVPWM), for higher voltage levels (>3), the balancing of capacitors voltages cannot be attained under some operational conditions.
Qamar Muhammad Attique +2 more
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A Comparison of Diode-Clamped and Cascaded Multilevel Converters for a STATCOM With Energy Storage
IEEE Transactions on Industrial Electronics, 2006The progression of distributed generation within a bulk power system will lead to the need for greater control of transmission-line power flows. Static synchronous compensators (STATCOMs) provide a power-electronics-based means of embedded control of transmission-line voltage and power flows.
Ying Cheng +4 more
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