Results 181 to 190 of about 6,022,431 (243)

Scalable MoS2/Si Photodiode Arrays From Roll‐to‐Roll Mechanical Exfoliation

Advanced Science, EarlyView.
A dry roll‐to‐roll route transforms mechanically exfoliated MoS2 flake networks into silicon‐integrated photodiode arrays. The MoS2/Si junctions generate photovoltaic output without applied bias, allowing illuminated pixels to locate light spots and reconstruct simple images.
Yigit Sozen, Thomas Pucher, Andres Castellanos‐Gomez   +2 more
wiley   +1 more source

Review of Gastrointestinal Capsule Robots: Materials, Actuation, Diagnostics, and Therapeutics

Advanced Science, EarlyView.
This review examines gastrointestinal capsule robots through a systems engineering lens, covering shell materials, actuation and localization strategies, diagnostic modalities, therapeutic interventions, and commercialization status. By mapping the complete technological chain from fabrication to clinical deployment, this work identifies critical gaps ...
Zengsheng Li, Zhongguo Ren, Yiliang Lin, Xianfeng Xia, Tianlong Li, Kai Fung Chan, Philip Wai Yan Chiu, Wei Peng Yong, Mengmeng Sun   +8 more
wiley   +1 more source

Voltage‐Reconfigurable Magneto‐Ionic Nanolayers in Dot Arrays for Probabilistic, Materials‐Engineered Security Primitives

Advanced Science, EarlyView.
A magneto‐ionic security‐by‐materials‐design strategy exploits voltage‐driven N3– migration in selectively contacted FeCoN dots, creating reconfigurable sub‐15 nm ferromagnetic sublayers with deterministic and/or probabilistic (single‐domain↔vortex) states, voltage‐tunable probabilities and fully stochastic orientation/chirality.
Irena Spasojevic, Federica Celegato, Alessandro Magni, Paola Tiberto, Jordi Sort   +4 more
wiley   +1 more source

Multispectral UV Imaging on Capacitive CMOS Arrays Enabled by Solution‐Processed Metal‐Oxide Nanoparticles

Advanced Science, EarlyView.
Ultraviolet (UV) imagers are important for a variety of applications but often require dedicated semiconductor process flows. Here, a versatile capacitive CMOS platform is transformed into a visible‐blind, multispectral UV imager through post‐CMOS functionalization with solution‐processed metal‐oxide nanoparticles. The UV‐induced photodielectric effect
Suman Kundu, Tao Shen, Kai Betlem, Murali K. Ghatkesar, Peter G. Steeneken, Frans P. Widdershoven   +5 more
wiley   +1 more source

Short circuit analysis and protection of power module IGBTs

Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005., 2005
In this paper, the failure modes of power module IGBTs have been experimentally studied by focusing on the short-circuit behaviour of the devices, with reference to the hard switching fault (HSF) and fault under load (FUL) types of fault. In particular, the current ringing phenomenon, having an important influence on the short circuit behaviour of the ...
CHEN Y, MUSUMECI S, PAGANO R, RACITI, Angelo, SMEDLEY K.   +4 more
openaire   +2 more sources

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A Discussion on IGBT Short-Circuit Behavior and Fault Protection Schemes

IEEE Transactions on Industry Applications, 1995
IGBTs are available with short-circuit withstand times approaching those of bipolar transistors. These IGBTs can therefore be protected by the same relatively slow-acting circuitry. The more efficient IGBTs, however, have lower short-circuit withstand times.
R. Chokhawala, J. Catt, L. Kiraly
exaly   +2 more sources

Short-Circuit Protection Circuits for Silicon-Carbide Power Transistors

IEEE Transactions on Industrial Electronics, 2016
An experimental analysis of the behavior under short-circuit conditions of three different silicon-carbide (SiC) 1200-V power devices is presented. It is found that all devices take up a substantial voltage, which is favorable for detection of short circuits. A transient thermal device simulation was performed to determine the temperature stress on the
Juan Colmenares, Jacek Rabkowski, Hans-Peter Nee   +2 more
exaly   +2 more sources

Resonant converter with inherent short-circuit protection

IEEE Transactions on Circuits and Systems II: Express Briefs, 2005
Using a systematic procedure for classifying resonant converters, we have synthesized a zero-voltage switching resonant structure with inherent short-circuit protection. We analyze the operating modes of the disclosed converter and derive the control characteristic curve. Experimental verification is presented in a 100-W prototype.
Javier Maixe-Altes, Luis Martínez-Salamero, Ramon Leyva, Enric Vidal-Idiarte, Angel Cid-Pastor   +4 more
openaire   +2 more sources

Short Circuit Protection of Silicon Carbide MOSFETs: Challenges, Methods, and Prospects [PDF]

IEEE Transactions on Power Electronics
With the fabulous growth of the renewable energy industry, silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (mosfets) are increasingly finding applications in various scenarios.
Helong Li, Lijian Ding, Xiongfei Wang
exaly   +2 more sources

Fundamentals of short-circuit protection for transformers

2010 63rd Annual Conference for Protective Relay Engineers, 2010
This paper reviews principles of protection against internal short circuits in transformers of various constructions. Transformer fundamentals are reviewed as pertaining to protection. In particular, the electromagnetic circuit of a transformer is reviewed that links the terminal currents, winding currents, fluxes, and ampere-turns (ATs) in a set of ...
Bogdan Kasztenny, Michael Thompson, Normann Fischer   +2 more
openaire   +1 more source