Results 11 to 20 of about 30,307 (306)
Influence of design parameters on the global performances of low-speed counter-rotating axial-flow fans [PDF]
, 2014 The present work aims at experimentally investigating the effects of some parameters on the performances of a counter-rotating stage, and on the instationary flow between the rotors.
BAKIR, Farid +5 more
core +1 more source
Journal of Arrhythmia, 2022 Background This study aimed to evaluate the predictors of recurrence of atrial tachyarrhythmias by structural and functional mapping: voltage, dominant frequency (DF), and rotor mapping after a pulmonary vein isolation (PVI) in nonparoxysmal atrial ...
Koji Kumagai +7 more
doaj +1 more source
Rotors on Active Magnetic Bearings: Modeling and Control Techniques [PDF]
, 2012 In the last decades the deeper and more detailed understanding of rotating machinery dynamic behavior facilitated the study and the design of several devices aiming at friction reduction, vibration damping and control, rotational speed increase and ...
Tonoli, Andrea +8 more
core +1 more source
PWM-based Flux linkage estimation for permanent magnet synchronous machines
The Journal of Engineering, 2019 Monitoring of rotor temperature in permanent magnet synchronous machines (PMSM) is of great importance as high temperature could cause partial or even irreversible demagnetisation of the permanent magnets (PMs).
Shuai Xiao, Antonio Griffo
doaj +1 more source
Study on the fault ride through critical elements and coordinated control of DFIG's converters
The Journal of Engineering, 2019 The increasing of large-scale wind power integration capacity brings great challenges to the safe operation and management of power grid.
Bingjie Tang +4 more
doaj +1 more source
THE ROTOR MODEL AND COMBINATORICS [PDF]
International Journal of Modern Physics B, 2002 We examine the groundstate wavefunction of the rotor model for different boundary conditions. Three conjectures are made on the appearance of numbers enumerating alternating sign matrices. In addition to those occurring in the O (n = 1) model we find the number A V (2m + 1;3), which 3-enumerates vertically symmetric alternating sign matrices.
Batchelor, Murray +2 more
openaire +4 more sources
Indagationes Mathematicae, 2016 We present and analyse a simple model for the twisting somersault. The model is a rigid body with a rotor attached which can be switched on and off. This makes it simple enough to devise explicit analytical formulas whilst still maintaining sufficient complexity to preserve the shape-changing dynamics essential for twisting somersaults in springboard ...
Sudarsh Bharadwaj +4 more
openaire +3 more sources
Aerodynamic investigations of ventilated brake discs. [PDF]
, 2005 The heat dissipation and performance of a ventilated brake disc strongly depends on the aerodynamic characteristics of the flow through the rotor passages.
MacManus, David G., Parish, D.
core +1 more source
The Journal of Engineering, 2019 The doubly fed induction generator (DFIG) has insufficient capacity to respond to the frequency inertia of the power grid due to the isolation between the rotor kinetic energy and the power grid by the generator-side converter.
Dongyang Sun +6 more
doaj +1 more source
Instability zones for isotropic and anisotropic multiblades rotor configurations [PDF]
, 2010 Helicopter ground resonance is an unstable dynamic phenomenon which can lead to the total destruction of the aircraft during take-off or landing phases. The earliest research in this domain was done by Coleman and Feingold around the 60's decade.
Leonardo Sanches +9 more
core +1 more source