Results 31 to 40 of about 48,127 (315)
Artificial optical emissions at HAARP for pump frequencies near the third and second electron gyro-harmonic [PDF]
, 2005 International audienceHigh-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the F-layer neutral oxygen causing artificial optical emissions identical to ...
F. T. Djuth +17 more
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Harmonics asynchronous torques in wound rotor induction motor with frequency converter in the rotor [PDF]
Mining and Metallurgy Engineering Bor, 2014 The subject of this paper is the harmonics asynchronous torqueses which appear due to the presence of high time harmonics in the voltage and current of wound rotor induction motor whose speed is regulated by frequency converter in the rotor circuit ...
Vukić Đukan +2 more
doaj +1 more source
Controls for the generation of high-order harmonics and attosecond pulses by an infrared laser field combined with a low-frequency pulse [PDF]
, 2012 We investigate high-order harmonic generations by controlling various quantum paths of harmonics in an infrared laser field which combines a low-frequency pulse.
贺海翔 +3 more
core +1 more source
Time-frequency representations of high order harmonics [PDF]
, 2001 We calculate time-frequency representations (TFRs) of high-order short pulse harmonics generated in the interaction between neon atoms and an intense laser field, including macroscopic effects of propagation and phase matching in the non-linear medium ...
Gaarde, Mette B.
core +2 more sources
IEEE Access, 2020 The problems of sub-synchronous oscillation and high-frequency oscillation related to inter-harmonics need to be solved in intermittent energy generation systems.
Jie Xie +7 more
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Random PWM Technique Based Two-State Markov Chain for Permanent Magnet Synchronous Motor Control
Applied SciencesOn the basis of the space voltage vector pulse width modulation (SVPWM) technique, the random pulse width modulation (RPWM) technique, which can reduce harmonics, is investigated based on the vector control system of permanent magnet synchronous motor ...
Zhiqiang Wang +4 more
doaj +1 more source
An improved single phase SPLL with DC and harmonics suppression
Energy Reports, 2023 This paper has proposed an improved single phase software phase lock loop (SPLL) with the ability of grid voltage DC and harmonics components suppression.
Long Xiao, Dongdong Chen
doaj +1 more source
Digital Current-Control Schemes [PDF]
, 2009 The paper is about comparing the performance of digital signal processor-based current controllers for three-phase active power filters. The wide use of nonlinear loads, such as front-end rectifiers connected to the power distribution systems for dc ...
Limongi, Leonardo +3 more
core +1 more source
IEEE Access, 2020 Line commutated converter (LCC) has been widely applied in hybrid high voltage direct current (HVDC) transmission system, where the modular multilevel converter (MMC) is applied as receiving end and may induce low order harmonics in DC-link voltage ...
He Huang +5 more
doaj +1 more source
High Frequency Limit for a Chain of Harmonic Oscillators with a Point Langevin Thermostat [PDF]
Archive for Rational Mechanics and Analysis, 2020 We consider an infinite chain of coupled harmonic oscillators with a Langevin thermostat at the origin. In the high frequency limit, we establish the reflection-transmission coefficients for the wave energy for the scattering of the thermostat. To our surprise, even though the thermostat fluctuations are time-dependent, the scattering does not couple ...
Tomasz Komorowski +3 more
openaire +3 more sources