Results 21 to 30 of about 160,807 (226)

An Introduction to Topological Insulators [PDF]

open access: yes, 2013
Electronic bands in crystals are described by an ensemble of Bloch wave functions indexed by momenta defined in the first Brillouin Zone, and their associated energies.
Carpentier, David, Fruchart, Michel
core   +4 more sources

The Optimization Design of Short-Term High-Overload Permanent Magnet Motors Considering the Nonlinear Saturation

open access: yesEnergies, 2018
Electric actuators with fast dynamic response and high torque density are widely used in aerospace and industrial applications. In this paper, the design and optimization of a short-term high-overload permanent magnet synchronous motor (STHO-PMSM) is ...
Yu-Xi Liu   +5 more
doaj   +1 more source

Improved transient simulation of salient-pole synchronous generators with internal and ground faults in the stator winding [PDF]

open access: yes, 2005
An improved model for simulating the transient behavior of salient-pole synchronous generators with internal and ground faults in the stator winding is established using the multi-loop circuit method.
Bi, D.Q.   +4 more
core   +1 more source

Specific Features of Fluoroplastic Band Bending with Due Account of Various Modularity of Material

open access: yesНаука и техника, 2019
The paper considers a technological process for production of sealing rings by winding a band work-piece on a cylindrical caliber mandrel with subsequent endurance under load and further cutting of a spiral in rings and also studies the possibility to ...
G. A. Vershina, L. E. Reut
doaj   +1 more source

Winding numbers of nodal points in Fe-based superconductors

open access: yes, 2017
We analyze the nodal points in multi-orbital Fe-based superconductors from a topological perspective. We consider the $s^{+-}$ gap structure with accidental nodes, and the $d$-wave gap with nodes along the symmetry directions.
Chichinadze, Dmitry V.   +1 more
core   +1 more source

Fractional Slot Concentrated Windings: A New Method to Manage the Mutual Inductance between Phases in Three-Phase Electrical Machines and Multi-Star Electrical Machines

open access: yesMachines, 2015
Mutual inductance is a phenomenon caused by the circulation of the magnetic flux in the core of an electrical machine. It is the result of the effect of the current flowing in one phase on the other phases.
Olivier Barre, Bellemain Napame
doaj   +1 more source

Topology counts: force distributions in circular spring networks [PDF]

open access: yes, 2017
Filamentous polymer networks govern the mechanical properties of many biological materials. Force distributions within these networks are typically highly inhomogeneous and, although the importance of force distributions for structural properties is well
Heidemann, Knut M.   +5 more
core   +3 more sources

The Topological Structure of the Space-Time Disclination

open access: yes, 1998
The space-time disclination is studied by making use of the decomposition theory of gauge potential in terms of antisymmetric tensor field and $\phi$-mapping method.
de Gennes P. G., Sheng Li, Yishi Duan
core   +1 more source

Inter-Turn Short Circuits in Stator Winding of Permanent Magnet Synchronous Generator Dedicated for Small Hydroelectric Power Plants

open access: yesEnergies
This article presents the simulation results of inter-turn short circuits in the stator winding of a permanent magnet synchronous generator (PMSG) dedicated for small hydroelectric power plants.
Adam Gozdowiak, Maciej Antal
doaj   +1 more source

Topological view on magnetic adatoms in graphene

open access: yes, 2011
We study theoretically the physical properties of a magnetic impurity in graphene. Within the Anderson model for a very strong Coulomb interaction on the impurity, we start from the Slave-Boson method and introduce a topological picture consisting of a ...
A. C. Hewson   +3 more
core   +1 more source

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