Results 21 to 30 of about 205,989 (300)

High-frequency Negative Effect Analysis and Countermeasures of Traction Inverter Based on all SiC MOSFET for Rail Transit

机车电传动, 2020
After the adoption of SiC device in traction converter for rail transit, the design of traction system will be negatively affected by the high switching speed and high switching frequency of power switch devices.
Yongjian ZHI, Deyong YANG, Bingquan ZHU, Keliang YUAN, Zifan GAO, Pengfei LI   +5 more
doaj  

Application of Perovskite Layer to Rotor for Enhanced Stator-Rotor Capacitance for PMSM Shaft Voltage Reduction

Energies, 2020
Adjustable speed drives use Pulse Width Modulation (PWM) to switch DC-bus voltage for the synthesis of three-phase voltages to provide power to the permanent magnet synchronous motor (PMSM).
Muhammad Aqil, Jun-Hyuk Im, Jin Hur
doaj   +1 more source

A 3D Reduced Common Mode Voltage PWM Algorithm for a Five-Phase Six-Leg Inverter

Machines, 2023
Neutral point voltage control converters (NPVCC) are being considered for AC drive applications, where their additional degree of freedom can be used for different purposes, such as fault tolerance or common mode voltage (CMV) reduction.
Markel Fernandez, Endika Robles, Iker Aretxabaleta, Iñigo Kortabarria, Jon Andreu, José Luis Martín   +5 more
doaj   +1 more source

Research on Analysis and Suppression Methods of the Bearing Current for Electric Vehicle Motor Driven by SiC Inverter

Energies
The silicon carbide (SiC) inverter brings great advantages to the motor drive systems of new energy vehicles; however, severe challenges to the bearings also happen.
Mingliang Yang, Yuan Cheng, Bochao Du, Yukuan Li, Sibo Wang, Shumei Cui   +5 more
doaj   +1 more source

Combined Effect of TID Radiation and Electrical Stress on NMOSFETs

Micromachines, 2022
The combined effect of total ionizing dose (TID) and electrical stress is investigated on NMOSFETs. For devices bearing both radiation and electrical stress, the threshold voltage shift is smaller than those only bearing electrical stress, indicating ...
Yanrong Cao, Min Wang, Xuefeng Zheng, Enxia Zhang, Ling Lv, Liang Wang, Maodan Ma, Hanghang Lv, Zhiheng Wang, Yongkun Wang, Wenchao Tian, Xiaohua Ma, Yue Hao   +12 more
doaj   +1 more source

Streamer evolution arrest governed amplified AC breakdown strength of graphene and CNT colloids

, 2018
The present article experimentally explores the concept of large improving the AC dielectric breakdown strength of insulating mineral oils by the addition of trace amounts of graphene or CNTs to form stable dispersions.
Chattopadhyay, Ankur, Dhar, Purbarun, Harikrishnan, A R, Maganti, Lakshmi Sirisha   +3 more
core   +1 more source

A cryogenic rotation stage with a large clear aperture for the half-wave plates in the Spider instrument [PDF]

, 2015
We describe the cryogenic half-wave plate rotation mechanisms built for and used in Spider, a polarization-sensitive balloon-borne telescope array that observed the Cosmic Microwave Background at 95 GHz and 150 GHz during a stratospheric balloon flight ...
Alexandra S. Rahlin, Amy Trangsrud, Anne Gambrel, Anthony Turner, Aurelien Fraisse, Benjamin Elder, Benjamin Saliwanchik, Brendan Crill, C. Barth Netterfield, Carl Reintsema, Carlo Contaldi, Carole Tucker, Carrie MacTavish, Craig Lawrie, Daniel C. Riley, Didier J., Donald Wiebe, Edward Young, Gene Hilton, H. Cynthia Chiang, Henderson S. W., Ivan Padilla, J. Richard Bond, James Bock, Jamil Shariff, Jeffrey Filippini, Johanna Nagy, John Ruhl, Jon Gudmundsson, Juan Soler, Kent Irwin, Krikor Megerian, Lorenzo Moncelsi, Mandana Amiri, Marcus Runyan, Mark Halpern, Matthew Hasselfield, Natalie Gandilo, Olivier Dore, Peter Ade, Peter Mason, Rebecca Tucker, Richard Bihary, Sean Bryan, Shyang Wen, Steven Benton, Thomas Montroy, Tracy Morford, Viktor Hristov, Warren Holmes, William Jones, Zigmund Kermish   +51 more
core   +3 more sources

Measurement of Direct Current Voltage Causing Electrical Pitting

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2010
It is widely known that electrical pitting occurs when an electrical current is passed through a ball or roller bearing. The authors have investigated critical electrical current density causing electrical pitting and have shown that it occurs in a ball ...
Shoji NOGUCHI, Shin-nosuke KAKINUMA, Tohru KANADA   +2 more
doaj   +1 more source

Interplay between Josephson and Aharonov-Bohm effects in Andreev interferometers [PDF]

, 2018
Proximity induced quantum coherence of electrons in multi-terminal voltage-driven hybrid normal-superconducting nanostructures may result in a non-trivial interplay between topology-dependent Josephson and Aharonov-Bohm effects.
Dolgirev, Pavel E., Kalenkov, Mikhail S., Zaikin, Andrei D.   +2 more
core   +4 more sources

Why and When Are Evidence‐Based Interventions Adopted in Paediatric Supportive Care? A Qualitative Exploration of the Determinants of Photobiomodulation Implementation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Oral mucositis is a common and debilitating side effect of childhood cancer and stem cell transplant treatments. It affects the quality of life of children and young people (CYP) and places a strain on services. Photobiomodulation is recommended for oral mucositis prevention in international guidance but is poorly implemented in UK ...
Claudia Heggie, Kara A. Gray‐Burrows, Peter F. Day, Bob Phillips, Carl A. Thompson   +4 more
wiley   +1 more source