Results 71 to 80 of about 1,002,747 (273)
Modeling and reduction of shaft voltages in AC motors fed by frequency converters [PDF]
, 2006 This thesis deals with the modeling and mitigation of shaft voltages and bearing currents in frequency converter-fed AC motors. Common-mode voltages produced by modern frequency converters can cause destructive currents in motor bearings.
Mäki-Ontto, Petri
core +1 more source
A novel stable nanopositioner based on a single piezoelectric stack: PistolDrive
AIP Advances, 2018 We describe a novel stable piezoelectric nanopositioner which just use one piezoelectric stack and one simple driving signal, in which the central shaft is clamped by one BeCu spring and four SiN balls that bonded to the inner wall of the cylindrical ...
Zongqiang Pang +3 more
doaj +1 more source
A Transnasal Endoscope for Robotically Assisted Gastroscopy
Advanced Robotics Research, EarlyView.This work introduces a 4.25 mm diameter magnetically navigated transnasal endoscope for upper gastrointestinal (GI) screening and intervention. The system enables precise remote steering throughout the upper GI tract and is demonstrated through in vitro and in vivo experiments, including the robotic execution of preprogrammed retroflexions, trans ...
Alexandre Mesot +6 more
wiley +1 more source
EnergiesIn this paper, we address shaft oscillations and grid-connected oscillation frequency coupling in doubly fed induction generators (DFIGs) under DC-link dynamics.
Zheng Wang, Yimin Lu
doaj +1 more source
Origami‐Inspired Morphing Fuselage for Agile Fixed‐Wing Flight
Advanced Robotics Research, EarlyView.Conventional aircraft steer with rigid control surfaces. SoAR instead replaces the fuselage itself with a cable‐driven origami continuum body that bends in 3D and compresses on demand. Whole‐fuselage morphing steers fixed‐wing flight: achieving sharp, near‐zero‐radius turns and rapid braking without ailerons, rudder, or elevator, while the same ...
Abudula Aihaitijiang, Cagdas D. Onal
wiley +1 more source
Experimental Study: Bearing Degradation Caused by Electrical Currents and Voltages at Low Speeds
LubricantsIn electric vehicles (EVs), bearings in traction motors are increasingly prone to electrical damage under operational currents and voltages, leading to accelerated wear and reduced lifespan.
Zifan Li, Ran Cai, Xueyuan Nie
doaj +1 more source
Advanced Science, EarlyView.This study identified Danofloxacin as a novel supporter of the maintenance of mouse embryonic stem cell (ESC) pluripotency. It functions partially by inhibiting HDAC1, which increases specific histone acetylation marks and activates key genes like Tert and Prdm10.
Yan Zhang +8 more
wiley +1 more source
Advanced Science, EarlyView.Engineered phage‐based trifunctional nanofibers are developed for synergistic biofilm eradication. Biofilm‐binding phages, armed with AuNPs and TCPP, serve as both warheads and scaffolds, endowing the phototherapy agents with biofilm‐anchoring ability. Upon light irradiation, AuNPs induce photothermal therapy, while TCPP generates 1O2 for photodynamic ...
Ying Cao +9 more
wiley +1 more source
Influence of parameters detuning on induction motor NFO shaft-sensorless scheme
Advances in Electrical and Computer Engineering, 2010 In this paper, the parameter sensitivity analysis of shaft-sensorless induction motor drive with natural field orientation (NFO) scheme is performed. NFO scheme calculates rotor flux position using the rotor flux vector reference only, does not require
KULIC, F. +3 more
doaj +1 more source
A Shaft Generator System without Output Voltage Distortion
IEEJ Transactions on Industry Applications, 1999 A shaft generator system, which consists of a shaft generator, a rectifier, an externally commutated thyristor inverter, an ac reactor, and a synchronous condenser, is being increasingly used mainly in large ships. Conventional type of the shaft generator system has a fundamental drawback of involving a large amount of harmonics in the output voltage ...
Nishikata, Shoji +3 more
openaire +2 more sources