Results 71 to 80 of about 1,128 (260)
Structural Dynamics Testing of Advanced Stirling Convertor Components [PDF]
NASA Glenn Research Center has been supporting the development of Stirling energy conversion for use in space. Lockheed Martin has been contracted by the Department of Energy to design and fabricate flight-unit Advanced Stirling Radioisotope Generators ...
Oriti, Salvatore M. +1 more
core +4 more sources
A Load‐Independent High‐Frequency Resonant DC‐DC Converter for LED Driver Applications
IET Power ElectronicsThis 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 +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 +3 more
doaj +1 more source
UV Plasmonic Metamaterial from Vertical Non-Conventional Nanoantennas [PDF]
, 2016 Boston, Massachusetts, November 29-December 4, 2015Metallic nanoantennas have been used as nanophotonic detectors of infrared and visible radiation [1] [2].
Alda, J. +3 more
core
Use of an inertia-less virtual synchronous machine within future power networks with high penetrations of converters [PDF]
, 2016 Conventional converter models for wind turbines and Voltage Source HVDC links, as submitted to System Operators, typically use dq-axis controllers with current injection (DQCI).
Adam Dysko +7 more
core +1 more source
Synchrotron Radiation for Quantum Technology
Advanced Functional Materials, EarlyView.Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader +10 more
wiley +1 more source
IET Power ElectronicsIn 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 +4 more
doaj +1 more source
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 +3 more
doaj +1 more source
, 2013 In this paper we introduce the concept of metasurfaces which are fully transparent when looking from one of the two sides of the sheet and have controllable functionalities for waves hitting the opposite side (one-way transparent sheets).
Asadchy, Viktar +2 more
core +1 more source
Advanced Functional Materials, EarlyView.This study demonstrates an alternative method of creating charge‐stable negatively charged nitrogen vacancy (NV−) centers close to the diamond surface without high‐temperature annealing. By illuminating nitrogen‐implanted regions with a continuous‐wave 405 nm laser, NV− centers are induced, exhibiting electron spin coherence properties suitable for ...
Jens Fuhrmann +4 more
wiley +1 more source