Results 71 to 80 of about 19,797 (301)

Verification of the indication correctness of total harmonic distortion meters [PDF]

, 2008
W artykule opisano metodę sprawdzania dokładności wskazań mierników zawartości harmonicznych za pomocą sygnału napięciowego zawierającego wzorcową, ściśle określoną wartość współczynnika zawartości harmonicznych (THD).
Wojturski, J.
core  

A novel hybrid PWM algorithm having superior harmonic performance

Ingeniería e Investigación, 2009
This paper presents a novel hybrid modulation algorithm which improves the harmonic performance of eight of the most common pulse width modulation (PWM) algorithms for voltage source inverters (VSI) in the electric drive field. From harmonic a-nalysis of
Diana Jimena López Mesa, Guillermo Alberto Camacho Muñoz, Jaime Oscar Díaz Chávez, Carlos Alberto Gaviria López, Gilberto Bolaños Pantoja   +4 more
doaj  

A three-phase current source inverter with third harmonic injection for grid-connected renewable power sources [PDF]

Zbornik Radova: Elektrotehnički Institut "Nikola Tesla"
A novel three-phase voltage-synchronized current source (VSCS) converter with third harmonic injection is proposed in this paper. Compared with the conventional vector current control (VCC), phaselocked loop (PLL) is completely removed in this method ...
Ninković Predrag, Janda Žarko, Pejović Predrag   +2 more
doaj   +1 more source

From Photoalignment to Structured Light: Liquid Crystal Platforms for Beam Shaping and Complex Wavefronts

Advanced Functional Materials, EarlyView.
Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou, Tingjun Zhong, Sijie Liu, Pouya Nosratkhah, Ke Xu, Yuzhen Zhao, Kristiaan Neyts   +6 more
wiley   +1 more source

Analysis of total harmonic distortion in class D amplifiers [PDF]

, 2006
This dissertation presents the analysis of parameters affecting Total Harmonic Distortion (THD) of a closed-loop class D amplifier and suggests the parameter to be adjusted to reduce the THD.Master of Science (Consumer ...
The Mya Thandar.
core  

Power Quality Analysis of a Microgrid-Based on Renewable Energy Sources: A Simulation-Based Approach

Computation
At present, microgrids (μGs) are a focal point in both academia and industry due to their capability to sustain operations that are stable, resilient, reliable, and of high power quality.
Emmanuel Hernández-Mayoral, Christian R. Jiménez-Román, Jesús A. Enriquez-Santiago, Andrés López-López, Roberto A. González-Domínguez, Javier A. Ramírez-Torres, Juan D. Rodríguez-Romero, O. A. Jaramillo   +7 more
doaj   +1 more source

Giant Electrostriction in Halide Perovskites Revisited With Double‐Modulation Interferometry

Advanced Functional Materials, EarlyView.
A giant electrostrictive effect in lead halide perovskites had been reported previously. This work uses sensitive interferometry to measure the electromechanical response of various halide perovskite samples. The results reveal no intrinsic electrostrictive compression. Instead, the materials expand primarily under an applied electric field as a result
Philipp Ramming, Markus Griesbach, Ralf Moos, Lothar Kador, Anna Köhler   +4 more
wiley   +1 more source

PEMODELAN DAN ANALISIS PENERAPAN TOPOLOGI PWM REVERSIBLE RECTIFIER PADA PWM RECTIFIER UNTUK MEREDUKSI TOTAL HARMONIC DISTORTION [PDF]

, 2022
ABSTRAK Penurunan kualitas daya listrik yang diakibatkan harmonisa terjadi pada rectifier. Peralatan elektronika daya tersebut akan memberikan kontribusi arus harmonik yang besar.
Wijono, n/a, Siregar, Dody, Djuriatno, Waru   +2 more
core  

Reducing the effect of total harmonics distortion of synchronous machines

ZANCO JOURNAL OF PURE AND APPLIED SCIENCES, 2019
Synchronous machines have a great role in power system generation and controlling, reducing harmonics have been a major concern of researchers, especially with the increasing of electronic equipment and automated controls in addition to use of nonlinear loads in power systems all of these increase additional harmonic generated.
Haydar Ahmad H, Aree Akram M
openaire   +3 more sources

Polarization‐Dependent Synaptic‐Like Electro‐Optical Response in Ferroelectric Nematic Liquid Crystals

Advanced Functional Materials, EarlyView.
Ferroelectric nematic liquid crystals (FNLCs) offer fast, tunable polarization and low‐voltage operation but suffer from poor polarization retention at zero field. Semiconductor‐modified FNLCs enhance polarization retention and exhibit short‐ and long‐term electro‐optical responses, while also supporting spike‐type signal integrations.
Kutay Sagdic, Weiming Yao, Danqing Liu
wiley   +1 more source