Results 31 to 40 of about 363 (265)
900 V GaN-based sine-wave inverters for three-phase industrial applications
The Journal of Engineering, 2019 GaN devices are gradually getting attention within the industry along with SiC as a potential wide bandgap device. At present, there are almost no high-voltage GaN devices with voltage >650 V, which makes an inverter design difficult for a three-phase ...
Nilanjan Mukherjee +3 more
doaj +1 more source
Generic spice compatible model of current feedback in switch mode convertors
Electronics Letters, 1992 The mechanism of duty cycle generation in current mode (CM) and average current mode (ACM) PWM convertors is examined and found to be identical except for the functional relationship of the controlling parameters. This result is used to develop a SPICE compatible and topology independent generic current mode (GCM) model.
S. Ben-Yaakov, Z. Gaaton
openaire +1 more source
FEBS Letters, EarlyView.Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley +1 more source
DC–DC converter with a high step-down ratio for water desalination applications
The Journal of Engineering, 2019 A single-stage 600 : 1 ratio voltage step-down dc–dc converter designed to produce a voltage of between 1 and 1.5 V from a rectified single/three-phase AC supply, for application in a desalination process, is presented. A coupled-inductor design is used,
Richard C. Pollock +3 more
doaj +1 more source
A Four-Quadrant Switched Capacitor DC-DC Convertor Enabling Power-Efficient Lab-Grade Potentiostats [PDF]
2020 IEEE 20th Mediterranean Electrotechnical Conference ( MELECON), 2020 This paper presents a low-power potentiostat based on a four-quadrant switched capacitor DC-DC convertor for use in lab applications. The gearbox convertor achieves a compliance voltage of ±2.5V. Through the use of frequency scaling, the convertor features output currents in the range of 1µA to 1mA, outclassing other state-of-the-art power efficient ...
Swiggers, Matthias +4 more
openaire +2 more sources
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Design of a full SiC three-phase power factor correction with an interleaved output buck converter
The Journal of Engineering, 2019 Active rectification of the three-phase grid nowadays is a central task of power electronics. However, as the necessary DC bus voltages vary, DC-DC converters are needed.
Maximilian Nitzsche +3 more
doaj +1 more source
FEBS Letters, EarlyView.Although too much iron in the brain promotes neurodegeneration, iron ion chelators have had mixed effects in clinical trials. This review explains why; some chelators do not render the iron redox‐inactive (e.g., L1) whereas others do (e.g., desferrioxamine).
Barry Halliwell
wiley +1 more source
IET Renewable Power GenerationA soft switching non‐isolated bidirectional DC–DC converter with an improved voltage conversion ratio without any additional auxiliary switch is presented in this paper. In the proposed converter, improved step‐up/step‐down gain conversion is achieved by
Nasrin Asadi Madiseh, Ehsan Adib
doaj +1 more source
Flux control modulation for the dual active bridge DC/DC converter
The Journal of Engineering, 2019 This paper introduces a modulation technique for the single-phase dual active bridge (DAB) in which the switching frequency and transformer flux linkage are modulated to achieve improved power transfer characteristics and reduced converter losses.
Niklas Fritz +4 more
doaj +1 more source