Results 261 to 270 of about 125,363 (305)
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Even harmonics in alternating-current circuits
Proceedings of the American Institute of Electrical Engineers, 1909In the usual presentation and consideration of wave-forms in alternating-current circuits we are so used to the mathematical expressions which omit the second, fourth, sixth, etc. harmonics and so generally assume that these even harmonics can be neglected at the outset, that a short consideration of usual and special conditions, giving rise to even ...
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Second-harmonic alternating current polarography
Australian Journal of Chemistry, 1966The technique of second-harmonic a.c. polarography is discussed from the viewpoints of theoretical basis, experimental requirements, and scope of application. The theoretical relation is given for the second-harmonic current-component of a straightforward electrochemical reaction under conditions of a.c, polarography.
HH Bauer, DCS Foo
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Current International Harmonization Efforts
2009Efforts towards international cooperation or harmonization can occur at varying levels – at the level of technical and scientific requirements, of dossier format and content, or of assessment and review practices. Three contrasting models for regional cooperation in drug regulation harmonization, the corporate, populist, and cooperative, are described ...
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Harmonic reduction in thyristor converters by harmonic current injection
IEEE Transactions on Power Apparatus and Systems, 1976The paper describes analytical and experimental results for a new method of current harmonic reduction in thyristor converters. The principle of the method is to modify the current waveforms on the d.c. windings of the converter transformer by injecting harmonic currents at a particular frequency.
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Eliminating harmonic neutral current problems
2008 IEEE/PES Transmission and Distribution Conference and Exposition, 2008Powering multiple computer loads connected phase-neutral in a 3-phase wye distribution system places exceptional thermal stresses on the switchgear, transformers and wiring of that system. The presence of harmonic currents can lead to equipment failures and, in the worst case, fires.
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Harmonic oscillator driven by a quantum current
Physical Review Letters, 1989We show that under certain circumstances a simple quantum harmonic oscillator driven by a quantum current evolves to unique pure states even if started as a mixed state. In various limits, these states exhibit nonclassical properties such as sub-Poissonian statistics, or more interestingly resemble macroscopic superpositions.
, Slosser, , Meystre, , Braunstein
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Cascaded Harmonic Current Control Loop for VSG Harmonic Current Suppression
2023 4th International Conference on Power Engineering (ICPE), 2023Fan Yang +5 more
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Time harmonic eddy currents in non‐linear media
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 1998One way to deal with non‐linearity in the case of time harmonic excitation of the electric and magnetic fields in ferromagnetic media is to introduce an effective material to model the ferromagnetic region. This fictitious material is constant throughout a period but inhomogeneous and it takes into account the non‐linear relationship between the field ...
Paoli, Gerhard, Bíró, Oszkár
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A modified harmonic current vector method for harmonic contribution determination
IEEE PES Power Systems Conference and Exposition, 2004., 2005This paper deals with the determination of customer contributions to harmonic distortion at the point of connection to the utility network. The approach proposed in this paper is derived from the common power factor practice where a load should be fully compensated at the fundamental frequency and therefore seen as resistive from the network.
B. Blazic, T. Pfajfar, I. Papic
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ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics, 2002
Modern adjustable-speed, induction motor drives are responsible for contaminating electric networks with undesirable harmonics. Most of the speed controllers developed for induction motors employ a rectifier-inverter arrangement. In this arrangement, the alternating current drawn by the rectifier contains many undesirable harmonics. These harmonics may
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Modern adjustable-speed, induction motor drives are responsible for contaminating electric networks with undesirable harmonics. Most of the speed controllers developed for induction motors employ a rectifier-inverter arrangement. In this arrangement, the alternating current drawn by the rectifier contains many undesirable harmonics. These harmonics may
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