Results 171 to 180 of about 6,182 (210)

A new diode-clamp cascade multilevel converter

IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468), 2004
Cascade 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, null Yun-ping Zou, null Zhan Wang, null Zhi-chao Wu, null Yun Zhang   +4 more
openaire   +1 more source

A Sparse Multilevel Matrix Converter Based on Diode-Clamped Topology

2007 IEEE Industry Applications Annual Meeting, 2007
This 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, Alireza R. Bakhshai, Praveen K. Jain   +2 more
openaire   +1 more source

Snubber circuit for diode-clamped four-levelinverter and converter

IEE Proceedings - Electric Power Applications, 2001
The 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
openaire   +1 more source

Voltage-balancing strategies for diode-clamped multilevel converters

2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004
This 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, R. Pindado, D. Boroyevich, P. Rodriguez, J. Vicente   +4 more
openaire   +1 more source

A Simplified Virtual Vector PWM for Four-Level Diode-Clamped Converter

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019
The 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, Kui Wang, Yongdong Li   +2 more
openaire   +1 more source

A Comparison of Diode-Clamped and Cascaded Multilevel Converters for a STATCOM With Energy Storage

IEEE Transactions on Industrial Electronics, 2006
The 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, Chang Qian, Mariesa L. Crow, Steve Pekarek, Stanley Atcitty   +4 more
openaire   +1 more source

Modulation Methods for Balancing the Capacitor Voltages of N-Level Diode-Clamped Converters

IEEE Transactions on Industrial Electronics, 2023
Diode-clamped converters (DCCs) suffer from the inherent capacitor voltage imbalance problem. Most software-based voltage-balancing methods fall into the space vector modulation category and the carrier-based pulsewidth modulation category. Despite their effectiveness for the three-level DCCs, it is not easy to extend them to a general n-level topology.
Huawei Yuan, Hin Sang Lam, Neha Beniwal, Josep Pou, S. Y. Ron Hui   +4 more
openaire   +2 more sources

Diode-clamped multilevel converters: a practicable way to balance DC-link voltages

IEEE Transactions on Industrial Electronics, 2002
The converter topologies identified as diode-clamped multilevel (DCM) or, equivalently, as multipoint clamped (MPC), are rarely used in industrial applications, owing to some serious drawbacks involving mainly the stacked bank of capacitors that constitutes their multilevel DC link. The balance of the capacitor voltages is not possible in all operating
MARCHESONI, MARIO, P. TENCA
openaire   +2 more sources

A matrix converter without diode clamped over-voltage protection

Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435), 2002
In this paper, the design and testing of a new protection strategy for a matrix power converter feeding an induction motor is described. The new protection strategy, with excellent overvoltage protection, allows to remove the large and expensive diode clamp.
Mahlein, Jochen, Braun, Michael
openaire   +1 more source

Voltage Balancing in Five-Level Diode-Clamped Power Converters

IFAC Proceedings Volumes, 2013
Abstract This paper addresses the voltage imbalance problem of the dc-link capacitors in multilevel power converters. Considering the five-level diode-clamped converter, a mathematical analysis of the capacitor voltage difference dynamics is carried out.
Francisco Umbría, Fabio Gómez-Estern, Francisco Gordillo, Francisco Salas   +3 more
openaire   +1 more source