Results 71 to 80 of about 179 (176)

Application of the GRC Stirling Convertor System Dynamic Model

, 2004
The GRC Stirling Convertor System Dynamic Model (SDM) has been developed to simulate dynamic performance of power systems incorporating free-piston Stirling convertors. This paper discusses its use in evaluating system dynamics and other systems concerns.
Lewandowski, Edward J., Schreiber, Jeffrey G., Regan, Timothy F.   +2 more
core  

Light‐Actuated Fiber‐Climbing Inchworm Robot Toward Endoluminal Navigation

Advanced Functional Materials, EarlyView.
A kirigami‐inspired soft inchworm robot harnesses optical energy from a customized side‐emitting optical fiber, guaranteeing its propulsion along the fiber body. The wavelength‐selective responsiveness of dye‐functionalized liquid crystal elastomers and the application of temporal illumination patterns enable sequential control of robot components. The
Antonio Lobosco, Leilei Song, Fan Liu, Yu‐Hsiang Lin, Venkatasubramanian Kalpathy Venkiteswaran, Hao Zeng, Sarthak Misra   +6 more
wiley   +1 more source

A Load‐Independent High‐Frequency Resonant DC‐DC Converter for LED Driver Applications

IET Power Electronics
This paper introduces a soft‐switching single‐switch step‐down LED driver. The switch operates under zero voltage switching condition, which eliminates switching losses as well as capacitive turn‐on losses.
Behzad Soleymani, Ramin Khalili, Ehsan Adib   +2 more
doaj   +1 more source

A 99%-efficiency GaN converter for 6.78 MHz magnetic resonant wireless power transfer system

The Journal of Engineering, 2014
The authors developed a high-efficiency gallium-nitride (GaN) Class-E converter for a 6.78 MHz magnetic resonant wireless power transfer system. A negative-bias gate driver circuit made it possible to use a depletion mode GaN high-electron-mobility ...
Yoshiyuki Akuzawa, Yuki Ito, Toshihiro Ezoe, Kiyohide Sakai   +3 more
doaj   +1 more source

Dual‐Mode Magnetic Elastomer for On‐Demand Motion and Degradation

Advanced Functional Materials, EarlyView.
A dual‐mode magnetic elastomer is introduced, enabling DC field‐driven programmable actuation and AC field‐driven magnetothermal degradation. GHz‐range magnetic fields generate ultrafast heating of magnetic nanoparticles that activates cleavage of the silicone elastomer matrix.
Jieun Han, Hyun An, Min‐Ha Oh, Yu‐Lim Lee, Woojin Jeon, Kyung‐Sub Kim, Jae‐Hwan Lee, Seungmin Kang, Yoon‐Nam Kim, Ji‐Won Kang, Daewhan Kim, Min Sang Kwon, Sang‐Koog Kim, Seung‐Kyun Kang   +13 more
wiley   +1 more source

A New Method for Loss Optimization in LLC Resonant Converters via Integrated Magnetic and Tank Design

IET Power Electronics
In environments with numerous converters, there is a need for highly efficient. The LLC resonant converter is a good candidate for microgrid applications, as it features low switching losses and a wide voltage regulation range.
Andre de Souza Leone, Henrique Marin Van Der Broocke Campos, Édwin Augusto Tonolo, William Rafhael da Silva, Romulo Francisco Lepinsk Lopes   +4 more
doaj   +1 more source

Grid current low-order harmonics suppression of the three-phase grid converter with an LCL filter under the distorted grid voltage

The Journal of Engineering, 2019
This article presents an extended backstepping control method to reduce the grid-side current harmonics caused by grid voltage distortion. A dynamic model considering the grid voltage as an external disturbance is derived in the stationary reference ...
Hang Yin, Zhiyong Dai, Xianzhang Lei, Tian Lan   +3 more
doaj   +1 more source

Interaction of ocean waves with oscillating water column wave energy convertors

, 2014
The last two decades have seen increasing interest in renewable energy technologies in response to the pollution effects from extensive use of fossil fuels and global warming.
Jean-Roch Pierre Nader (20280894)
core  

Titanium Suboxides Responsible for Electronic Anomaly Near Room Temperature in the Ti3C2Tx MXene

Advanced Functional Materials, EarlyView.
Our multi‐technique study reveals that the near‐room‐temperature anomaly in Ti3C2Tx MXene is linked to titanium suboxide nanodomains, including Ti3O5, embedded within the MXene host. Their temperature‐driven transformation provides an alternative explanation to solvent‐ and swelling‐based models and offers new insight into the thermally activated ...
Bence G. Márkus, Bradlee J. McIntosh, Lili Vajtai, Anna Nyáry, Sándor H. Sipos, Nirmal J. Ghimire, Ferenc Simon, László Forró, Dávid Beke   +8 more
wiley   +1 more source

Exploring Pb‐Chelation Chemistry in the Crystallization Dynamics of Halide Perovskites

Advanced Functional Materials, EarlyView.
A mechanism of how Pb‐chelation chemistry governs coordination geometry and initial nucleation behavior at the precursor level of halide perovskite, by regulating the deprotonation state of a chelating additive, is elucidated. This allows for innovative reaction‐system design principles that promote coherent growth while suppressing defect formation in
Byeong Jun Kim, Inseo Cho, Jung Geon Son, Yifan Yu, Gunhee Kim, Eunseo Shin, Seyeon Eom, Minsub Um, Subeom Shin, Hyungju Ahn, Dong Suk Kim, Hochan Song, Hyosung Choi, Jonghee Yang   +13 more
wiley   +1 more source