Results 61 to 70 of about 4,785 (242)

Modification Strategies of Carbon‐Based Electrodes From Structural Regulation to Multifunctional Integration

Advanced Science, EarlyView.
Tracing the evolution from structural regulation to multifunctional integration, this paper systematically analyzes modification strategies for carbon‐based electrodes. It evaluates how element doping, surface functionalization, and composite material design affect the electrode performance, and offers perspectives on future applications and challenges
Yunlei Wang, Shitao Dou, Yifan Wu, Mingguang Wang, Taibin Wu   +4 more
wiley   +1 more source

Staircase Matrix Modulation for the Switched-Capacitor Modular Multilevel Converter With Sensor-Less Capacitor Voltage Balancing

IEEE Open Journal of Power Electronics
Staircase modulation is a switching technique ubiquitous in multilevel inverters utilizing large number of output voltage levels. With tens of levels, the output of a multilevel inverter employing staircase modulation approaches a sinusoid without ...
Rami F. Yehia, Zhehui Guo, Hui Li, Fang Z. Peng   +3 more
doaj   +1 more source

Research on a risk evaluation and suppression method for high-frequency resonance of flexible low-frequency transmission

Zhejiang dianli, 2022
Due to the long delay of their control chains， voltage source converters （VSCs） in the high frequency band tend to show negative damping， which may give rise to high-frequency resonance when VSCs are connected to power systems.
HUA Wen, LIN Jintian, QIU Peng, LU Yi, PAN Wulue, ZHANG Jing, LIN Yizhe   +6 more
doaj   +1 more source

Integrating Spatial Proteogenomics in Cancer Research

Advanced Science, EarlyView.
Xx xx. ABSTRACT Background: Spatial proteogenomics marks a paradigm shift in oncology by integrating molecular analysis with spatial information from both spatial proteomics and other data modalities (e.g., spatial transcriptomics), thereby unveiling tumor heterogeneity and dynamic changes in the microenvironment.
Yida Wang, Yang Wu, Feng Zhang, Parthiban Periasamy, Haiyue You, Denise Goh, Rachel Elizabeth Ann Fincham, Xin Ning, Danping Wu, Lu Liu, Ying Jiang, Zhiwen Qian, Joe Yeong, Yan Zhang   +13 more
wiley   +1 more source

Novel modular multilevel matrix converter topology for efficient high-voltage AC-AC power conversion

Electrical engineering & Electromechanics
Introduction. This paper delves into the practical application of multilevel technology, particularly focusing on the capacitor-clamped converter as a promising solution for medium-to-high voltage power conversion, with specific emphasis on direct AC-AC ...
F. Saidi, A. Djahbar, E. Bounadja, W. M. Kacemi, K. Fettah   +4 more
doaj   +1 more source

A 3D Thermal Network Model for Monitoring Imbalanced Thermal Distribution of Press-Pack IGBT Modules in MMC-HVDC Applications

Energies, 2019
In this paper, the impact of a double-sided press-pack insulated-gate-bipolar-transistor (PP IGBT) cooling structure on its thermal impedance distribution is studied and explored. A matrix thermal impedance network model is built by considering the multi-
Yao Chang, Wuhua Li, Haoze Luo, Xiangning He, Francesco Iannuzzo, Frede Blaabjerg, Weixing Lin   +6 more
doaj   +1 more source

Solidifying Power Electronics [Historical] [PDF]

, 2018
More than one century ago, in 1902, American engineer Peter Cooper Hewitt (1861\u20131921) derived the mercury arc-rectifier, enclosed in a glass bulb, from his mercury-vapor lamp of the previous year.
Guarnieri, Massimo
core   +1 more source

Single‐Crystal PZT‐Driven Organic Piezo‐Phototronic Adaptive Transistors Toward Advanced Spatiotemporal Visual Computing

Advanced Science, EarlyView.
Here, we propose a single‐crystal PZT‐based piezo‐phototronic organic adaptive memory transistor (OAMT), achieving a record memory window capacity factor (γ) of 0.87 at a low SS of 200 mV/decade via efficient multi‐field control. The device achieves a high recognition accuracy ∼ 90% in neuromorphic simulations, demonstrates robust fault tolerance under
Chenhao Xu, Xingyu Cao, Zewen Li, Shifu Xiong, Yongxu Hu, Zhongwu Wang, Yujie Yuan, Lei Zheng, Wenping Hu   +8 more
wiley   +1 more source

Comparison of full power frequency converter topologies for large capacity variable speed pumped storage units

电力工程技术
Variable speed pumped storage units have obvious advantages in efficiency and adaptability under various operation conditions compared with traditional fixed-speed pumped storage units.
Bo ZHAO, Fengyuan TIAN, Qichao ZHANG, Kaiguo WANG, Hao LIANG, Jinwu GONG   +5 more
doaj   +1 more source

A Modular Multilevel Matrix Converter for High Speed Drive Applications

, 2016
The Modular Multilevel Matrix Converter (M3C) performs a direct three-phase AC to AC power conversion and is highly suitable for medium voltage high power drive applications. One area of application are high speed drives such as compressors. However, additional balancing power components which reduce the output power capability of the M3C when input ...
Bräckle, Dennis, Kammerer, Felix, Schnarrenberger, Mathias, Hiller, Marc, Braun, Michael   +4 more
openaire   +3 more sources