Results 21 to 30 of about 1,738 (216)

Analysis of Auto Parametric Oscillations at the Subharmonic Frequency in Two-Phase Ferro Resonance Circuits

open access: yesProceedings of the International Conference on Applied Innovations in IT, 2023
Oscillatory processes in nonlinear multiphase electro ferromagnetic circuits (EFMC) have an exceptional variety and complexity, and therefore their research is also associated with solving complex physical problems.
Mukhtorhon Ibadullayev
doaj   +1 more source

Impact of voltage subharmonics and interharmonics on currents in single-phase induction motors

open access: yesScientific Journal of Gdynia Maritime University, 2021
In very low power drives, a single-phase induction motor is used. This motor, like the 3-phase induction squirrel-cage motor, requires a voltage supply with suitable parameters – of suitable quality, in practice.
Marcin Pepliński
doaj   +1 more source

A Method for Minimizing Subharmonics in Stator MMF of PMSM

open access: yes, 2023
Winding distribution plays a major role in deciding the space harmonics in the stator MMF. In this work, significance of winding layer on the MMF harmonics in surface-mounted permanent magnet synchronous motor (PMSM) with fractional slot concentrated ...
Ragavan, K., Manju Bhashini, R.
core   +1 more source

The Use of Voltage Transformers for the Measurement of Power System Subharmonics in Compliance With International Standards [PDF]

open access: yes, 2022
The measurement of subharmonics in distribution systems requires instrument transformers to reduce voltage and current to levels fitting with the low-voltage input of the power quality (PQ) instruments.
Luiso M.   +7 more
core   +1 more source

Influence of voltage subharmonics on induction motors of various efficiency classes

open access: yesScientific Journal of Gdynia Maritime University, 2020
Power quality disturbances related to voltage waveform distortions and effective value deviation are common in power systems. Apart from higher harmonics, subharmonics and interharmonics may also appear in voltage waveforms.
Marcin Pepliński
doaj   +1 more source

Dynamics of a mechanical system with nonlinear elastic suspension and spectral analysis of the results

open access: yesОмский научный вестник, 2023
The article considers the dynamics of a nonlinear mechanical system under the action of a kinematic perturbation on it. The object's vibration isolation system is described by a rigid cubic power characteristic and is based on compensation of external ...
V. A. Nekhaev   +3 more
doaj   +1 more source

Subharmonic functions, generalizations and separately subharmonic functions [PDF]

open access: yesJournal of Inequalities and Applications, 2006
First, we give the definition for quasi-nearly subharmonic functions, now for general, not necessarily nonnegative functions, unlike previously. We point out that our function class incudes, among others, quasisubharmonic functions, nearly subharmonic functions (in a slightly generalized sense) and almost subharmonic functions.
openaire   +7 more sources

SUBHARMONIC AND STRONGLY SUBHARMONIC FUNCTIONS

open access: yes, 2022
"Science and innovation" international scientific journal.
openaire   +2 more sources

Acoustic Tracking of Pitch, Modal, and Subharmonic Vibrations of Vocal Folds in Parkinson’s Disease and Parkinsonism

open access: yesIEEE Access, 2019
The prominent and early presence of dysphonia is considered a valuable marker for differentiation of idiopathic Parkinson's disease and parkinsonian syndromes.
Jan Hlavnicka   +4 more
doaj   +1 more source

SiC-MOSFET shunt active power filter based on half-cycle SDFT and repetitive control

open access: yesEnergy Reports, 2021
The switching frequency of traditional active power filter (APF) is usually between 10 kHz and 20 kHz. To better suppress switching subharmonics, the output filters of APFs usually use LCL-filters.
Xiao Guo, Hongyi Lin, Guozhu Chen
doaj   +1 more source

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