Results 291 to 300 of about 11,639,860 (350)

Third Harmonic Current Injection in Fault-Tolerant Five-Phase Permanent-Magnet Motor Drive

IEEE transactions on power electronics, 2018
This paper presents a third harmonic current injection method for a five-phase permanent-magnet (PM) motor with trapezoidal back electromotive force (EMF) under postfault field oriented control (FOC).
Guohai Liu, Zhipeng Lin, Wenxiang Zhao, Qian Chen, Gaohong Xu   +4 more
semanticscholar   +1 more source

Divisors and Harmonic Currents

2001
In the first two sections of the present chapter we introduce a conjecture (Conjecture 7.1) which specifies the idea that the characterization of the divisor of the Selberg zeta function of the a-twisted geodesic flow proved in Chapter 3 Section 3.3 is related to its characterizations in terms of a-twisted harmonic currents on SX.
openaire   +1 more source

Analysis of Harmonic Current Stability and Summation of LED Lamps

2019 Electric Power Quality and Supply Reliability Conference (PQ) & 2019 Symposium on Electrical Engineering and Mechatronics (SEEM), 2019
Harmonic load currents in distribution networks are to be closely observed, in particular, when connecting high number of non-linear loads and/or other sources to the grid.
M. Jarkovoi, M. N. Iqbal, L. Kütt
semanticscholar   +1 more source

Even harmonics in alternating-current circuits

Proceedings of the American Institute of Electrical Engineers, 1909
In 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 ...
openaire   +1 more source

Second-harmonic alternating current polarography

Australian Journal of Chemistry, 1966
The 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
openaire   +1 more source

Current International Harmonization Efforts

2009
Efforts 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 ...
openaire   +1 more source

Harmonic reduction in thyristor converters by harmonic current injection

IEEE Transactions on Power Apparatus and Systems, 1976
The 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.
openaire   +1 more source

Eliminating harmonic neutral current problems

2008 IEEE/PES Transmission and Distribution Conference and Exposition, 2008
Powering 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.
openaire   +1 more source

Harmonic oscillator driven by a quantum current

Physical Review Letters, 1989
We 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
openaire   +2 more sources

Direct Harmonic Current Control Scheme for Dual Three-Phase PMSM Drive System

IEEE transactions on power electronics, 2021
Senyi Liu, Chunhua Liu
semanticscholar   +1 more source