Results 251 to 260 of about 99,493 (298)

Short-Circuit Capability Prediction and Failure Mode of Asymmetric and Double Trench SiC MOSFETs

IEEE Transactions on Power Electronics, 2021
In this article, short-circuit capability prediction and failure mode of 1200-V-class SiC MOSFET s with a double and asymmetric trench structure are proposed under single-pulse short-circuit stress. A short-circuit prediction model is established to evaluate short-circuit withstand time and corresponding critical energy of devices under various dc bus
Xiaochuan Deng, Xu Li, Xuan Li, Hao Zhu, Xiaojie Xu, Yi Wen, Yongkui Sun, Wanjun Chen, Zhiqiang Li, Bo Zhang   +9 more
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Effect of asymmetrical dimensions in short circuit forces of power transformers

2005 International Conference on Electrical Machines and Systems, 2005
Calculation of the short circuit forces is very important in power transformer design. The main goal of this paper is calculation of these forces along the LV&HV windings in power transformer by using finite element method (FEM). After that, we described how forces are changing by increasing of asymmetrical dimensions and misalignment of LV&HV ...
M. Allahbakhsi, K. Abbaszadeh, A. Akbari
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Asymmetric Wide‐Bandgap Polymers Simultaneously Improve the Open‐Circuit Voltage and Short‐Circuit Current for Organic Photovoltaics

Macromolecular Rapid Communications, 2019
AbstractA trade‐off between open‐circuit voltage (V OC) and high short‐circuit (J SC) becomes one of the most vital problems limiting further improvement in polymer solar cells' (PSCs) efficiency. In this work, two asymmetric polymer donors PBDT‐F‐2TC and PBDT‐SF‐2TC are designed and synthesized. When blended with a state‐of‐the‐art acceptor IT‐4F with
Shaorong Huang, Wanying Gu, Lie Chen, Zhihui Liao, Yongkang An, Cunbin An, Yiwang Chen, Jianhui Hou   +7 more
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Short Circuit Current Characteristics Analysis and Improved Current Limiting Strategy for Three-phase Three-leg Inverter under Asymmetric Short Circuit Fault

IEEE Transactions on Power Electronics, 2018
Three-phase three-leg inverter is one of the most popular topologies for inverters. When short-circuit fault occurs, the inverter is generally switched to the current-controlled mode from voltage-controlled mode to limit the fault currents. In this situation, the inverter becomes equivalent to a symmetric, three-phase, positive sequence current source.
Zhigang Liang, Xinchun Lin, Yong Kang, Bofeng Gao, He Lei   +4 more
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Detection and isolation of asymmetrical short-circuit faults in permanent-magnet synchronous machines

2016 IEEE International Energy Conference (ENERGYCON), 2016
Phase-to-phase short-circuit faults in a permanent-magnet synchronous machines are quite dangerous because of the extremely high short-circuit transient current after fault. This paper presents a fault detection and identification diagnosis approach for asymmetrical faults in permanent-magnet synchronous machines, considering both inter-turn and phase ...
null Yuxue Ge, Yves Mollet, null Bifeng Song, Johan Gyselinck   +3 more
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Finite element analyses of short circuit forces in power transformers with asymmetric conditions

2008 IEEE International Symposium on Industrial Electronics, 2008
Short circuit forces may be destructive in a power transformer. Therefore, accurate evaluation of such forces is essential during the design and manufacturing phase. Otherwise, overestimated values may result in oversized, and in general, non-optimal design. The analytical methods are usually fast and easy to apply.
M. Reza Feyzi, M. Sabahi
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Asymmetrical Short-Circuit Response of the Wound Rotor Brushless Doubly-Fed Generator in Wind Turbines

2020 Asia Energy and Electrical Engineering Symposium (AEEES), 2020
This paper studies the dynamic response of the wound rotor brushless doubly-fed generator (BDFG) in asymmetrical fault conditions in the wind turbine. Physical behaviors under asymmetrical short-circuits are described by generalized analytical solutions and the relationship between flux linkage vectors is derived.
Quanquan Wang, Wanchun Qi, Xiaoyan Hu, Qinxin Huang, Yiqing Xu   +4 more
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A new compact band‐pass filter based on an asymmetric short‐circuited spurline resonator

Microwave and Optical Technology Letters, 2010
AbstractIn this letter, a new compact two‐pole band‐pass filter (BPF) based on an asymmetric short‐circuited spurline resonator is presented. The filter is modeled by means of a new multimodal circuit model for a microstrip to three‐line‐microstrip cross, which allows a rigorous study of a very generic new family of filters.
P. Rodriguez‐Cepeda, M. Ribó, F.J. Pajares, A. M. Sánchez, J. R. Regué, A. Pérez, L. Pradell   +6 more
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Short-circuit current of doubly fed induction generator under partial and asymmetrical voltage drop

Renewable Energy, 2016
Abstract The doubly fed wind turbine is the main equipment of wind generators. The fault transient characteristics of doubly fed induction generators (DFIG) have elicited the attention of many scholars. However, the short-circuit current (SCC) of power grid-contained DFIG under asymmetrical voltage drop cannot be accurately analyzed.
Jinxin Ouyang, Di Zheng, Xiaofu Xiong, Chao Xiao, Rui Yu   +4 more
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A method of analysing asymmetrical short-circuits on power systems including several synchronous machines

Electric Power Systems Research, 1982
Abstract This paper contains a new method for analysing symmetrical and asymmetrical faults at any point in a power system, which may include several synchronous machines connected together with transmission systems. The method is developed by using the symmetrical components, the axial components and a modified compensation theorem.
Esmat H. Badawy, B. Ramsay
openaire   +1 more source