Results 11 to 20 of about 390,386 (244)
Aeroacoustic analysis of main rotor and tail rotor interaction [PDF]
, 2008 The increased restrictions placed on helicopter noise levels over recent decades have encouraged manufacturers to better understand tail rotor noise and its aerodynamic sources.
Fletcher, Timothy M. +5 more
core +13 more sources
Novel Self-Excited Brush-Less Wound Field Vernier Machine Topology
IEEE Access, 2022 To realize the brush-less operation for wound field vernier machines (WFVMs), a novel self-excited topology is proposed in this paper which involves a four-pole main armature winding and a two-pole excitation winding connected in series using an ...
Syed Sabir Hussain Bukhari +6 more
doaj +1 more source
Dual-Mode Wound Rotor Synchronous Machine for Variable Speed Applications
IEEE Access, 2020 This paper presents a novel dual-mode wound rotor synchronous machine (DWRSM) for variable speed applications. The proposed machine combines the advantages of both the conventional wound rotor synchronous machine (CWRSM) and the brushless wound rotor ...
Muhammad Ayub +4 more
doaj +1 more source
Novel High Accuracy Resolver Topology for Space Applications
Sensors, 2021 In recent years, the space industry has experienced a significant change mainly due to the incursion of private companies, which has shaken up the sector. This new situation allows for a reduction regarding the reliability of conventional instrumentation
Jon Santiso-Zelaia +4 more
doaj +1 more source
Gong-kuang zidonghua, 2018 In view of problems of technical difficulties, high cost and high voltage requirements for power electronic components in current high voltage wound-rotor motor using stator-side high voltage inverter for frequency conversion speed regulation, a rotor ...
CHENG Guodong +2 more
doaj +1 more source
The Importance of Hydration in Wound Healing: Reinvigorating the clinical perspective [PDF]
, 2016 Balancing skin hydration levels is important as any disruption in skin integrity will result in disturbance of the dermal water balance. The discovery that a moist wound healing environment actively supports the healing response when compared to a dry ...
Cutting, K. F. +7 more
core +1 more source
Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight [PDF]
, 2010 The tail rotor of a helicopter with a single main rotor configuration can experience a significant reduction in thrust when the aircraft operates in crosswind flight. Brown’s vorticity transport model has been used to simulate a main rotor and tail rotor
Fletcher, Timothy M., Brown, Richard
core +4 more sources
Clinical usage of honey as a wound dressing: An update [PDF]
, 2004 Honey is an ancient treatment that is increasingly earning its place in modern wound care. Evidence suggests it compares with other dressings in terms of its antibacterial properties, ease of use and ability to promote a moist ...
Molan, Peter C.
core +1 more source
The Journal of Engineering, 2017 In this study, the influence of stator/rotor-pole combinations on electromagnetic performance in partitioned stator doubly salient permanent magnet (PS-DSPM) machines is investigated, in terms of open-circuit flux-linkage, back-electromotive force (EMF),
Zhongze Wu, Z.Q. Zhu
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Performance Analysis of WRIM Drive System Operating under Distorted and Unbalanced Supply: A Survey
Zanco Journal of Pure and Applied Sciences, 2020 The development of technology in power semiconductor devices leads to the increasing use of a static switching device in wound rotor induction motor (WRIM) controller systems.
Hilmy Fazil Ameen, Fadhil Toufick Aula
doaj +3 more sources