Results 31 to 40 of about 20,438 (288)
H2 formation and excitation in the Stephan's Quintet galaxy-wide collision [PDF]
, 2009 Context. The Spitzer Space Telescope has detected a powerful (L(H2)~10^41 erg s-1) mid-infrared H2 emission towards the galaxy-wide collision in the Stephan's Quintet (SQ) galaxy group.
Appleton, P. N. +3 more
core +3 more sources
A volume-preserving sharpening approach for the propagation of sharp phase boundaries in multiphase lattice Boltzmann simulations [PDF]
, 2010 Lattice Boltzmann models that recover a macroscopic description of multiphase flow of immiscible liquids typically represent the boundaries between phases using a scalar function, the phase field, that varies smoothly over several grid points.
Dellar, P. J., Reis, T.
core +2 more sources
Energies, 2018 The paper presents a particular Pulse Width Modulation (PWM) strategy to reduce the (Direct Current) DC-link capacitor stress for multi-n-phase drives.
Michela Diana +2 more
doaj +1 more source
Zero-/Low-Speed Operation of Multiphase Drive Systems With Modular Multilevel Converters
IEEE Access, 2019 Modular multilevel converter (MMC)-based AC motor drives are emerging trend-research. They ease medium-/high-voltage handling in high-power applications with reduced footprint and life-cycle costs. A known challenge concerning their operation is the zero-
Mohamed I. Daoud +5 more
doaj +1 more source
Clumpy Disc and Bulge Formation [PDF]
, 2013 We present a set of hydrodynamical/Nbody controlled simulations of isolated gas rich galaxies that self-consistently include SN feedback and a detailed chemical evolution model, both tested in cosmological simulations.
Michel-Dansac, L. +3 more
core +4 more sources
Performance Evaluation of Eleven-Phase Induction Machine with Different PWM Techniques
The Journal of Engineering Research, 2015 Multiphase induction machines are used extensively in low and medium voltage (MV) drives. In MV drives, power switches have a limitation associated with switching frequency.
M.I. Masoud, A.S. Abdelkhalik
doaj +1 more source
AC Dual Excitation Multiphase Electrostatic Drive.
Journal of the Robotics Society of Japan, 1997 An electrostatic motor technology that makes it possible to actuate machines with normal dimensions (not micro machines) by electrostatic force is developed. The novel motor is named AC Dual Excitation Multiphase Electrostatic Drive (ADEMED). It consists of a pair of two thin plastic films, called slider and stator, in both of which 3-phase parallel ...
Toshiki Niino +2 more
openaire +2 more sources
A Generalised Multifrequency PWM Strategy for Dual Three-Phase Voltage Source Converters
Energies, 2019 Pulse width modulation (PWM) strategies for the control of asymmetrical six-phase drives have been widely studied since the beginning of this century. Nevertheless, space vector modulation (SVM) techniques with multifrequency voltage injection for the ...
Jose A. Riveros +4 more
doaj +1 more source
Dynamic Response in Multiphase Electric Drives: Control Performance and Influencing Factors
Machines, 2022 Speed variable electric drives play a key role in the evolution of electrical mobility. The dynamic performance of these systems is a crucial feature for security purposes.
Angel Gonzalez-Prieto +3 more
doaj +1 more source
Technical Review of Traction Drive Systems for Light Railways
Energies, 2022 Due to environmental concerns, governments around the world are taking measures to decarbonise railway transport by replacing diesel traction systems with cleaner alternatives.
Nursaid Polater, Pietro Tricoli
doaj +1 more source