Results 151 to 160 of about 42,427 (189)

Eddy‐current computation on a one pole‐pitch model of a synchronous claw‐pole alternator

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2003
This paper deals with 3D finite‐element calculation of eddy currents in the claws of a claw‐pole alternator taking the rotational geometry movement into account. Two transient edge‐based vector formulations are utilised. The reduction of the model to only one pole pitch in combination with a special boundary pairing in the air gap for the applied lock ...
Kaehler, Christian, Henneberger, Gerhard
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Eddy-current computation in the claws of a synchronous claw-pole alternator in generator mode

IEEE Transactions on Magnetics, 2002
This paper deals with the three-dimensional finite-element (FE) calculation of eddy currents in the claws of a claw-pole alternator taking the rotational geometry movement into account. For this calculation a transient edge-based A/spl I.oarr/, A/spl I.oarr/ - T/spl I.oarr/ formulation is utilized. The generation of the FE model with a special focus on
C. Kaehler, G. Henneberger
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Synchronous multi-species alternations between the northern Humboldt and Kuroshio Current systems

Deep Sea Research Part II: Topical Studies in Oceanography, 2019
Abstract Synchrony of species alternations in the northern Humboldt (NHCS) and Kuroshio (KCS) Current systems was examined by comparing time series data of landings and population statistics of major small pelagic fish species along with climate indices from 1960 to 2015.
Yoshioki Oozeki, Miguel Ñiquen Carranza, Akinori Takasuka, Patricia Ayón Dejo, Hiroshi Kuroda, Jorge Tam Malagas, Takeshi Okunishi, Luis Vásquez Espinoza, Dimitri Gutiérrez Aguilar, Hiroshi Okamura, Renato Guevara Carrasco   +10 more
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Thermal Modeling of a Hybrid Excitation Synchronous Generator with Alternated Current Linkages for Stand-Alone Power Supply

International Review of Electrical Engineering (IREE), 2015
This paper presents the thermal modelling and analysis of a hybrid excitation synchronous generator with alternated current linkages (HESG-ACL) for stand-alone power supply. The HESG-ACL belongs to a class of hybrid excitation synchronous machines (HESMs), which combine the merits of electrically excited synchronous machines (EESMs) and permanent ...
Yulia Alexandrova, Katteden Kamiev, Valeriy Zaboin, Juha Pyrhönen   +3 more
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6 Hz transcranial alternating current stimulation of mPFC improves sustained attention and modulates alpha phase synchronization and power in dorsal attention network

Cognitive Neuroscience, 2020
Transcranial alternating current stimulation (tACS) is a noninvasive brain stimulation tool appropriate to modulate cortical oscillations and activity via the application of weak currents. The major goal of this study was to investigate the effects of medial Prefrontal Cortex (mPFC) stimulation on sustained attention task performance measured by Rapid ...
Rostami, Reza, Kazemi, Reza, Mozaffarinejad, Farzaneh, Nasiri, Zahra, Rostami, Maryam, Abed Hadipour Lakmehsari, Sadeghihassanabadi, Fatemeh   +6 more
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140. Effects of transcranial alternating current stimulation (tACS) on spontaneous motor tempo and sensorimotor synchronization: Preliminary data

Clinical Neurophysiology, 2013
We used transcranial alternating current stimulation (tACS) to modulate brain oscillations during spontaneous motor tempo and sensorimotor synchronization tasks to evaluate the effect of specific frequencies on motor performance. Six healthy subjects performed self-paced finger movements and auditory-paced finger tapping (synchronization–continuation ...
F. Giovannelli, I. Innocenti, M. Feurra, E. Santarnecchi, A. Borgheresi, E. Del Sordo, A. Ragazzoni, G. Zaccara, M.P. Viggiano, S. Rossi, M. Cincotta   +10 more
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Calculation of synchronous reactances of small permanent-magnet alternating-current motors: comparison of analytical approach and finite element method with measurements

IEEE Transactions on Magnetics, 1998
The synchronous reactances of permanent magnet (PM) motors have been determined using: (1) analytical method, i.e., form factors of the stator field (armature reaction factors), (2) finite element method (FEM), and (3) experimental tests on a special machine set.
J. GIERAS, SANTINI, Ezio, M. WING
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Placement multi flexible alternating current transmission system (FACTS) : Static var compensator (SVC) and static synchronous compensator (STATCOM) for improving voltage stability of 500 KV Java-Bali electrical power system

AIP Conference Proceedings, 2020
Demand for electricity is increasing rapidly, the consequence of this is a threat to the stability of the electrical system, one of which is the voltage stability. FACTS or flexible alternating current transmission system is an electronic equipment capable of regulating electrical power transmission that can be used to overcome stability problems. This
Chico Hermanu Brillianto Apribowo, Meiyanto Eko Sulistyo, Muhammad Hamka Ibrahim, Agus Ramelan, Subuh Pramono, Joko Slamet Saputro, Oktavian Listiyanto   +6 more
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Using analytical signals and synchronous detection to obtain signals of skin galvanic activity on alternating current

Biomedical Radioelectronics
The interest in the skin galvanic channel for obtaining information about a person's condition is related to the fact that these signals mainly arise as a result of higher nervous activity. This makes them interesting in a number of practical applications, such as lie detectors, devices for monitoring the ability of operators, etc.
V.I. Mirgorodsky, V.V. Gerasimov, A.V. Gerus, V.V. Dementienko, A.P. Kundin   +4 more
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Synchronous alternating current motor and mechanical vibrating system maintained by a thermionic valve at the frequency of the vibrating system

Proceedings of the Physical Society, 1926
The design of a chronograph which will give a time trace subdivided into units and fractional units requires the association of a rotating system and a vibrating or time-keeping system. It a low-frequency vibrating system be employed, the rotating system, although keeping good average time, may show exaggerated errors in unit subdivisions due to ...
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