Results 31 to 40 of about 419,978 (293)

Square-wave drive for synchronous reluctance machine and its torque ripple analysis

CES Transactions on Electrical Machines and Systems, 2021
Synchronous reluctance machine (SynRM) can be perceived as a special type of permanent magnet synchronous machine (PMSM), and shares similar control method, i.e. the sine-wave current drive with sinusoidal phase currents. In this paper, square-wave drive,
Jian-Xin Shen, Shun Cai, Dong-Min Miao, Dan Shi, Jacek Gieras, Yun-Chong Wang   +5 more
doaj   +1 more source

Small-scale dynamo action during the formation of the first stars and galaxies. I. The ideal MHD limit

, 2010
We explore the amplification of magnetic seed fields during the formation of the first stars and galaxies. During gravitational collapse, turbulence is created from accretion shocks, which may act to amplify weak magnetic fields in the protostellar cloud.
Abel, Abel, Arshakian, Balbus, Banerjee, Banerjee, Banerjee, Banerjee, Beck, Begelman, Bertschinger, Biskamp, Brandenburg, Brandenburg, Bromm, Bromm, Christensson, D. R. G. Schleicher, de Souza, Dubois, Eisenstein, Federrath, Federrath, Fromang, Galli, Glover, Glover, Grasso, Greif, Hatori, Haugen, Haugen, Haugen, Hennebelle, Hennebelle, Hennebelle, Kazantsev, Klessen, Kolmogorov, Komatsu, Koushiappas, Kritsuk, Lazar, M. Spaans, Machida, Machida, Maki, Maki, Medvedev, Mee, Mellon, Omukai, Pinto, Pinto, Pudritz, R. Banerjee, R. Beck, R. S. Klessen, Ryu, S. Sur, Schekochihin, Schleicher, Schleicher, Schleicher, Schleicher, Schleicher, Schleicher, Schlickeiser, Schmidt, Seager, Seager, Sethi, Silk, Smith, Spaans, Stancil, Subramanian, Subramanian, Subramanian, Sur, T. G. Arshakian, Tan, Tashiro, Tashiro, Wang, Wise, Wise, Xu, Yoshida, Yoshida   +89 more
core   +2 more sources

Improved rotor position estimation in extended back-EMF based sensorless PM brushless AC drives with magnetic saliency [PDF]

, 2007
An improved extended back-EMF based sensorless control method is proposed for a brushless AC motor equipped with an interior permanent magnet rotor. It accounts for dq-axis cross-coupling magnetic saturation by introducing an apparent mutual winding ...
Bingham, Chris, Howe, D, Li, Y, Zhu, Z Q
core   +1 more source

Sirolimus for Extracranial Arteriovenous Malformations: A Scoping Review of the Evidence in Syndromic and Non‐Syndromic Cases

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Arteriovenous malformations (AVMs) are rare, high‐flow, vascular anomalies that can occur either sporadically or as part of a genetic syndrome. AVMs can progress with serious morbidity and even mortality if left unchecked. Sirolimus is an mTOR inhibitor that is effective in low‐flow vascular malformations; however, its role in AVMs is unclear.
Will Swansson, Ingrid Winship, Gary Hammerschlag, Laura Scardamaglia   +3 more
wiley   +1 more source

Magnetic helicity fluxes in interface and flux transport dynamos

, 2010
Dynamos in the Sun and other bodies tend to produce magnetic fields that possess magnetic helicity of opposite sign at large and small scales, respectively. The build-up of magnetic helicity at small scales provides an important saturation mechanism.
A. Brandenburg, Archontis, Blackman, Blackman, Blackman, Blackman, Brandenburg, Brandenburg, Brandenburg, Brandenburg, Brandenburg, Cattaneo, Chatterjee, Choudhuri, Covas, Dikpati, Dikpati, Durney, G. Guerrero, Gressel, Guerrero, Jepps, Jouve, Kleeorin, Kleeorin, Käpylä, MacGregor, Markiel, Mitra, Ossendrijver, P. Chatterjee, Parker, Parker, Petrovay, Pouquet, Shukurov, Spiegel, Subramanian, Sur, Sur, Tobias, Vainshtein, van Ballegooijen, Vishniac, Zhang   +44 more
core   +3 more sources

A small angle neutron scattering and Mössbauer spectrometry study of magnetic structures in nanocrystalline Ni3Fe [PDF]

, 1999
Results are reported from small angle neutron scattering and Mössbauer spectrometry measurements on nanocrystalline Ni3Fe. The nanocrystalline materials were prepared by mechanical attrition and studied in the as-milled state, after annealing at 265 °C ...
Frase, H. N., Fultz, B., Robertson, J. L., Spooner, S.   +3 more
core   +1 more source

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Full-speed sensorless control system of synchronous reluctance motor with flux saturation model

Scientific Reports
To solve the problem that the rotor estimation accuracy is greatly affected by parameter nonlinearity and high frequency oscillation, when the synchronous reluctance motor adopts the sensorless control system.This article proposes a new flux saturation ...
Hui Cai, Wen-jian Luo
doaj   +1 more source

Performance Analysis of Single Phase Short Circuit of Three Phase Induction Motor Based on the Method of Field and Circuit

Journal of Harbin University of Science and Technology, 2017
According to the short circuit fault occurs in single-phase winding of three-phase induction motor， based on the basic theory of electrical machinery，adopting the research method of combining field and circuit， taking an 11 kW cage type three-phase ...
MENG Da-wei, GAO Xiang
doaj   +1 more source