Results 1 to 10 of about 2,160 (178)

Research on an active fault current suppression strategy for modular multilevel DC transformers

Zhejiang dianli
The modular multilevel DC transformer （MMDCT） serves as critical equipment in the all-DC systems， where DC fault isolation represents a key technical challenge that must be addressed during system operation.
XU Ling, ZHAO Le, ZHANG Xiaohu, GUO Hanlin, ZHANG Zheren, XU Zheng   +5 more
doaj   +1 more source

Hierarchical Control Design of a Modular Integrated OBC for Dual-Motor Electric Vehicle Applications

IEEE Access
This paper presents a novel modular integrated on-board charger (MIOBC) topology and control scheme for dual-motor electric vehicle (EV) applications.
Fatemeh Nasr Esfahani, Ahmed Darwish, Saud Alotaibi, Felician Campean   +3 more
doaj   +1 more source

$S$-2-absorbing submodules and $S$-2-absorbing second submodules

, 2020
Let R be a commutative ring with identity, S be a multiplicatively closed subset of R, and let M be an R-module. In this paper, we introduce the notion of S-2-absorbing second submodules of M as a generalization of S-second submodules and strongly 2-absorbing second submodules of M. We investigate some properties of this class of submodules.
openaire   +2 more sources

Second syzygies of monomial submodules from walks

, 2011
This paper has been subsumed as section 2 of our joint paper posted in June 2012.
Craw, Alastair, Velez, Alexander Quintero   +1 more
openaire   +2 more sources

Improved Control of Capacitor Voltage Balancing in Modular Multilevel Converter Submodules

IEEE Access
An improved incremental capacitor voltage balancing control strategy is proposed to solve the problems of large switching frequency, high complexity of the bubble method sorting algorithm, and exceeding the limit of the capacitor voltage fluctuation rate
Yanling Lyu, Yuansong Zi, Xiaowei Li
doaj   +1 more source

Variable Submodule Voltage Control for Enhanced Efficiency in DAB-Integrated Modular Multilevel Converters

Energies
Modular multilevel converters (MMCs) are widely used in power-conversion applications, including distributed energy storage integration, because of their scalability, high efficiency, and reduced harmonic distortion.
Marzio Barresi, Davide De Simone, Edoardo Ferri, Luigi Piegari   +3 more
doaj   +1 more source

Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control

World Electric Vehicle Journal
The modular multilevel converter (MMC) has unique topological characteristics and has gained significant popularity in medium-voltage applications. However, during MMC operation, circulating currents inevitably arise, exacerbating arm current distortion,
Xin Gu, Wenxuan Zhao, Guozheng Zhang, Xuqing Yao, Xuefeng Jin, Wei Chen, Chen Li   +6 more
doaj   +1 more source

Keyframe recommendation based on feature intercross and fusion

Complex & Intelligent Systems
Keyframe extraction can effectively help users quickly understand video content. Generally, keyframes should be representative of the video content and simultaneously be diverse to reduce redundancy.
Guanci Yang, Zonglin He, Zhidong Su, Yang Li, Bingqi Hu   +4 more
doaj   +1 more source

EFS-YOLO: A Steel Surface Defect Detection Model Fusing Multi-Scale Edge Features and Frequency-Domain Information

IEEE Access
To resolve false and missed detections in metal surface defect detection, and to improve the model’s performance on multi-scale and complex samples, a detection method named EFS-YOLO is proposed.
Pengcheng Meng, Wei Zhang, Hao Chen
doaj   +1 more source

φ-weakly second submodules

, 2022
Let R be a commutative ring with identity and M be an R-module. A non-zero submodule N of M is said to be a weakly second submodule if rsN⊆K, where r,s∈R and K is a submodule of M, implies either rN⊆K or sN⊆K. In this paper we introduce and study the concept of φ-weakly second submodules which are generalizations of weakly second submodules. Let φ:S(M)→
openaire   +1 more source