Results 81 to 90 of about 193,068 (312)

SiC/GaN power semiconductor devices: a theoretical comparison and experimental evaluation under different switching conditions [PDF]

, 2017
The conduction and switching losses of SiC and GaN power transistors are compared in this paper. Voltage rating of commercial GaN power transistors is less than 650V while that of SiC power transistors is less than 1200V.
Acanski M., Chen Z., Chinthavali M., Friedrichs P., Li K., Li K., Li K., Mousa R., Schülting P., Srdic S., Ueda D., Wang J., Wu H.   +12 more
core   +2 more sources

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

A ZVT Auxiliary Circuit for High Step-Up Multi-Input Converters with Diode-Capacitor Multiplier

Majlesi Journal of Electrical Engineering
In this paper, a Zero-Voltage Transition (ZVT) non-isolated high step-up multi-input DC-DC converters is proposed which employs an auxiliary cell and diode-capacitor multiplier.
Sayed Hossein Mirlohi, Mohammad Yazdani, Mohammad Reza Amini   +2 more
doaj   +1 more source

A novel soft-switching inverter using resonant inductor freewheeling [PDF]

, 1997
A novel topology of the voltage-source soft-switching inverter for induction motor drives is presented. The key of this topology is to employ two fractional-duty auxiliary switches and one resonant inductor per phase to provide a favorable zero-voltage ...
Chan, CC, Chan, DTW, Chau, KT, Yao, JM
core   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Electrical Control of 2D Magnetism in Bilayer CrI3 [PDF]

, 2018
The challenge of controlling magnetism using electric fields raises fundamental questions and addresses technological needs such as low-dissipation magnetic memory. The recently reported two-dimensional (2D) magnets provide a new system for studying this
Clark, Genevieve, Cobden, David H., Huang, Bevin, Jarillo-Herrero, Pablo, Klein, Dahlia R., MacNeill, David, McGuire, Michael A., Navarro-Moratalla, Efren, Seyler, Kyle L., Wilson, Nathan, Xiao, Di, Xu, Xiaodong, Yao, Wang   +12 more
core   +2 more sources

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu, Giovanni Gammaitoni, Michael Häfner, Eduardo Villalobos‐Portillo, Carlo Marini, Matteo Bianchini   +5 more
wiley   +1 more source

Fully Soft Switched Coupled Inductor-Based Semi Dual Active Half Bridge Converter with Voltage Match Control

Energies
This article proposes a fully soft-switched coupled-inductor-based semi dual-active half-bridge (SDAHB) converter designed for wide voltage range and low power applications.
Liting Li, Mei Su, Wenjing Xiong, Yu Han, Guo Xu   +4 more
doaj   +1 more source

A Fault-Tolerant T-Type Multilevel Inverter Topology with Soft-Switching Capability Based on Si and SiC Hybrid Phase Legs [PDF]

, 2016
The performance of a novel three-phase four-leg fault-tolerant T-Type inverter topology is presented in this paper, which significantly improves the inverter\u27s fault-tolerant capability regarding device switch faults.
Demerdash, Nabeel, He, Jiangbiao, Katebi, Ramin, Wei, Lixiang, Weise, Nathan   +4 more
core   +1 more source

A novel soft switching crossing current resonant converter (XCRC) [PDF]

, 1994
Unlike other resonate or soft-switching converter, this novel topology employs only two switches and a very simply control method. The inherent constant power protection feature is another merit. No special resonate chip is needed to control the circuit.
Pong, MH, Poon, FNK
core   +1 more source