Results 11 to 20 of about 36,146 (304)
A Novel Sub-Harmonic Synchronous Machine Using Three-Layer Winding Topology
World Electric Vehicle Journal, 2022 This paper proposes a novel brushless synchronous machine topology that utilizes stator sub-harmonic magnetomotive force (MMF) for desirable brushless operation.
S M Sajjad Hossain Rafin +2 more
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Energies, 2020 In an open-winding machine, three-phase stator currents can be controlled such that the input armature currents may contain the third-harmonic current component in addition to the fundamental.
Syed Sabir Hussain Bukhari +3 more
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Harmonics in a wind power plant [PDF]
2015 IEEE Power & Energy Society General Meeting, 2015 Wind power generation has been growing at a very fast pace for the past decade, and its influence and impact on the electric power grid is significant. As in a conventional power plant, a wind power plant (WPP) must ensure that the quality of the power being delivered to the grid is excellent.
V. Preciado +3 more
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Calculation of Rotor Harmonic Losses in Multiphase Induction Machines
Machines, 2022 The topic of this paper is the determination of rotor harmonic losses in multiphase machines. Specifically, harmonic losses occur in the rotor winding and core due to higher-order spatial harmonics of the flux density.
Bogdan Brkovic, Milos Jecmenica
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Energies, 2023 The analyses of the influence of spatial harmonics on the electromagnetic torque of the multi-phase induction machine and reducing this influence are important tasks to ensure the high efficiency of the induction machine.
Andriy Kutsyk +3 more
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Study of Winding Structure to Reduce Harmonic Currents in Dual Three-Phase Motor
World Electric Vehicle Journal, 2023 Dual three-phase motors have the problem of a large generation of harmonic currents while driving due to small inductance for certain harmonics. The purpose of this paper is to theoretically clarify the effect of the winding structure of dual three-phase
Akito Yoshida, Kan Akatsu
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Topological string in harmonic space and correlation functions in $S^3$ stringy cosmology [PDF]
, 2006 We develop the harmonic space method for conifold and use it to study local complex deformations of $T^{\ast}S^{3}$ preserving manifestly $SL(2,C) $ isometry. We derive the perturbative manifestly $SL(2,C) $ invariant partition function $\mathcal{Z}_{top}
Aganagic +68 more
core +2 more sources
Harmonic aspects of wind power integration [PDF]
Journal of Modern Power Systems and Clean Energy, 2013 This paper discusses a number of ways in which wind power installations can impact the harmonic levels in the power system. Wind turbines are an additional source of harmonic emission, especially when it concerns “non-characteristic harmonics.” Parallel resonances can amplify the emission from individual turbines.
Math H. J. Bollen, Kai Yang
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AC Distributed Winding with Low Higher Spatial Harmonics Content in Mmf Distribution
Energies, 2023 This paper presents a new winding with a low higher spatial harmonics content. This winding enables the elimination of the fifth harmonic, as the most significant, in three-phase winding and the third harmonic in two-phase symmetrical winding.
Jan Staszak
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Are there static texture? [PDF]
, 1999 We consider harmonic maps from Minkowski space into the three sphere. We are especially interested in solutions which are asymptotically constant, i.e. converge to the same value in all directions of spatial infinity.
A. Vilenkin +13 more
core +4 more sources