Results 51 to 60 of about 16,582,402 (197)
Controlling the state of quantum spins with electric currents [PDF]
Nature Physics, 2010 It is well known that a spin-polarized current can be used to manipulate the orientation of nanometre-scale magnets. This ability has now been extended to control the spin orientation of magnetic atoms adsorbed on a surface. A current of spin-polarized electrons senses and controls the magnetic state of nanostructured materials1.
Loth, S. +5 more
openaire +2 more sources
Soft start-up scheme for the hybrid distribution transformer
The Journal of Engineering, 2018 Hybrid distribution transformer (HDT) is an integrated system of the conventional distribution transformer and the PWM converters, which can greatly enhance the controllability of the conventional distribution transformer and is important for the ...
Yibin Liu +5 more
doaj +1 more source
IET Smart Grid, 2021 Hybrid AC‐DC microgrids (HMGs) are formed by interconnecting AC microgrids (MGs) and DC microgrids via AC‐DC interlinking converters (ICs). In the islanded mode, apart from power sharing in a single MG, power sharing expansion throughout HMG is desirable.
Mehdi Baharizadeh +2 more
doaj +1 more source
DFIG versus PMSG for marine current turbine applications [PDF]
, 2012 Emerging technologies for marine current turbine are mainly relevant to works that have been carried out on wind turbines and ship propellers. It is then obvious that many electric generator topologies could be used for marine current turbines. As in the
BENELGHALI, Seifeddine +3 more
core
Operational control and protection implications of fault current limitation in distribution networks [PDF]
, 2009 Rising short-circuit fault current levels is one of the problems associated with the increased presence of distributed generation (DG) in electrical networks.
Blair, S.M. +3 more
core +3 more sources
Research on Model Predictive Current Control Strategy for AC Electric Springs
发电技术ObjectivesTo improve the ability of AC electric springs (ACES) to stabilize the voltage of critical load (CL) under load switching and grid-side voltage fluctuations, a model predictive current control (MPCC) strategy is proposed.MethodsFirstly, for ...
FAN Weihan +5 more
doaj +1 more source
Reduction of common-mode voltage using a simplified FSC-MPC for a five-phase induction motor drive
The Journal of Engineering, 2019 This paper presents a cascaded closed-loop control of a five-phase induction motor (IM) drive system with common-mode voltage reduction capability. The outer loop uses standard PI regulators for speed reference tracking, while the inner control loop is ...
Hugo Guzman +3 more
doaj +1 more source
A novel high-conversion-ratio bidirectional three-phase DC–DC converter
The Journal of Engineering, 2019 A novel high-conversion-ratio bidirectional three-phase DC–DC converter is proposed in this paper, which features not only low switch voltage and current stresses, but also automatic voltage balancing and current sharing ability without adding extra ...
Fan Wang +3 more
doaj +1 more source
Capacitor voltage balancing control with reducing the average switching frequency in MMC
The Journal of Engineering, 2019 Modular multilevel converter (MMC) has a very good application prospect in the flexible high-voltage direct current (HVDC) transmission, but higher self-loss will affect the efficiency and restrict the development.
Shunliang Wang +4 more
doaj +1 more source
Loop stability analysis of boost circuit under globally dynamic compensation strategy
The Journal of Engineering, 2018 The PFC Boost converter controlled by the mode of CCM has strong non-linearity due to the use of non-linear elements such as power switch and multipliers.
Xiaofan Wang +3 more
doaj +1 more source