Results 61 to 70 of about 15,247 (308)

Policy Effectiveness Analysis of China’s Circuit Breaker Mechanism

Complexity, 2020
From June to August 2015, China’s security market suffered a severe decline due to the impact of the stock market crash. For this reason, the Shanghai Stock Exchange issued a notice on December 4, 2015, deciding to implement the circuit breaker mechanism
Wei Zhou, Wanying Rao, Danxue Luo
doaj   +1 more source

Determination of failure degree of 1.2 kV SiC MOSFETs after short-circuit test using an improved test setup

Nanotechnology and Precision Engineering, 2020
Analysis of the short-circuit characteristics of SiC metal-oxide-semiconductor field-effect transistors (MOSFETs) is very important for their practical application.
Shen Diao, Jun Sun, Ziwei Zhou, Zhenzhong Zhang, Adolf Schöner, Zedong Zheng, Weiwei He   +6 more
doaj   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

An IEGT Model for Analyzing the High Current Turn-off Characteristics in DC Circuit Breaker Applications

IEEE Access, 2020
The direct current (DC) circuit breaker based on semiconductor power devices is one of the critical components in multiterminal flexible high voltage DC transmission technology.
Xin Liu, Litong Wang, Guishu Liang, Lei Qi   +3 more
doaj   +1 more source

Dynamic Control of Synaptic Plasticity by Competing Ferroelectric and Trap‐Assisted Switching in IGZO Transistors with Al2O3/HfO2 Dielectrics

Advanced Functional Materials, EarlyView.
A frequency‐tunable ferroelectric synaptic transistor based on a buried‐gate InGaZnO channel and Al2O3/HfO2 dielectric stack exhibits linear and reversible weight updates using single‐polarity pulses. By switching between ferroelectric and trap‐assisted modes depending on input frequency, the device simplifies neuromorphic circuit design and achieves ...
Ojun Kwon, Dong Ho Lee, Seyoung Oh, Jongwon Yoon, Hyo‐Bae Kim, Ji‐Hoon Ahn, Woojin Park, Han Seul Kim, Byungjin Cho   +8 more
wiley   +1 more source

Criterion and Delay Optimization of Circuit Breaker Failure Protection Based on Tail Current Recognition

Zhongguo dianli
When the circuit breaker acts, the current on the primary side of the current transformer suddenly decreases, and the inductive effect will form a tail current on secondary side, which will cause the time of return of the failure protection to be too ...
Xiangwen CHEN, Yang LIU, Qingchun ZHAO, Jin ZHANG, Mingliang JIN, Xiaochun XU, Yulong WANG, Hua XIE   +7 more
doaj   +1 more source

Development and Application of a 10 kV Mechanical DC Circuit Breaker

Energies, 2019
A DC circuit breaker is piece of core equipment for DC grid construction and can achieve fast isolation of DC faults in the grid. In this paper, based on the fault characteristics and protection requirements of an AC/DC hybrid distribution network, the ...
Lu Qu, Zhanqing Yu, Xiang Xiao, Wei Zhao, Yulong Huang, Rong Zeng   +5 more
doaj   +1 more source

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva, Giulio Fatti, Emanuel Carlos, Guilherme Ferreira, Sumita Goswami, Suman Nandy, Luiz H. C. Mattoso, Elvira Fortunato, Caio G. Otoni, Rodrigo Martins   +9 more
wiley   +1 more source

Research on topological structure and simulation of hybrid DC circuit breaker

The Journal of Engineering, 2019
At present, the hybrid DC circuit breaker (ABB company's Hybrid DC circuit breaker as the representative scheme) must be equipped with the radiator because of a long-time current passing through the power electronic devices in the load-control-switch ...
Chu Zhuang, Xu Bing, Yu Zhanqing, Wang Nianhua   +3 more
doaj   +1 more source

Switching transients caused by vacuum circuit breakers in collection grids of offshore wind farms [PDF]

, 2021
Jiayuan Tao, Qing Yang, Xuena Zheng, Yanxiao He, Ruixue Wang, Hefei Lv, Jie Zhang   +6 more
openalex   +1 more source