Results 111 to 120 of about 1,873 (236)

A carrier pulse width modulation for asymmetric three-level NPC inverter

The three-level neutral point clamped (NPC) inverters are widely used in practice. One of nowadays research trends of multilevel inverter topologies has been reduction of switch number.
Cuong, Quoc Thai Lam, Nguyen, Nho Van
core   +1 more source

Increased Endurance of Nonvolatile Photonics Enabled by Nanostructured Phase‐Change Materials

Advanced Materials, Volume 38, Issue 31, 2 June 2026.
Tapered and segmented islands of the phase‐change material (PCM) antimony selenide (Sb2Se3) integrated on silicon microring resonators enable ultra‐low‐loss, high‐endurance, non‐volatile photonic tuning. The nanostructured PCM design suppresses interfacial scattering and thermal stress, achieving record endurance over 100 million electrical switching ...
Jayita Dutta, Andrew Tang, Brian Mills, Rui Chen, Arnab Manna, Gokul Nath SJ, Virat Tara, Dennis Callahan, Cosmin Constantin Popescu, Juejun Hu, Arka Majumdar   +10 more
wiley   +1 more source

Pulse Width Modulated Control of Robotic Manipulators

, 1990
In this paper we propose a practical discontinuous feedback control scheme for the regulation of joint positions of robotic manipulators. A robust on-off switching control strategy based on a pulse-width-modulation (PWM) feedback scheme is proposed for ...
Ahmad, Shaheen, Zribi, Mohammed, Sira-Ramirez, Hebertt   +2 more
core  

Discontinuous Hybrid Modulation Technique for Three-Phase Three-Level Neutral Point Clamped Inverters

, 2013
Multilevel converters are widely used in high-power applications such as motor drives, utility applications, and, more recently, photovoltaic and wind generation systems.
Roberto Petrella, PETRELLA, Roberto, Alessandro Pevere, PEVERE, Alessandro   +3 more
core   +1 more source

Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance

Advanced Materials Interfaces, Volume 13, Issue 11, 9 June 2026.
Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad, Vandana Molahalli, Apichart Pattanaporkratana, Nattaporn Chattham   +3 more
wiley   +1 more source

M3D‐DPWM strategy for three‐phase four‐leg inverter with higher harmonic suppression capability

IET Power Electronics
Three‐phase four‐leg inverters are widely used in power systems due to their inherent ability to handle unbalanced loads. However, with conventional 3D space vector pulse width modulation (3D‐SVPWM), high harmonics of large amplitude exist in the output ...
Ning Li, Panpan Shen, Jie Li, Jiale Hu, Changjie Zhang   +4 more
doaj   +1 more source

Retificador buck trifásico unidirecional PWM isolado em alta-frequência por único estágio [PDF]

, 2012
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2009Descreve-se uma nova topologia de conversor CA-CC trifásico isolado em alta-frequência por único estágio ...
Greff, Diego Santos
core  

Improving capacitor voltage ripples and power losses of modular multilevel converters through discontinuous modulation

, 2013
The voltage ripple of the capacitors of the modular multilevel converter (MMC) increases when the converter output frequency decreases. This occurs in motor drive applications at low motor speeds, where the output frequency is reduced proportionally to ...
J. Zaragoza, Ceballos, S., Agelidis, V. G., S. Ceballos, J. Pou, G. Konstantinou, Konstantinou, G., Zaragoza, J., V. G. Agelidis, R. Picas, Picas, R., Pou, J.   +11 more
core   +1 more source

Graphene‐Based Wearable Textile Triboelectric Nanogenerators and Biomechanical Sensors

Advanced Materials Technologies, Volume 11, Issue 12, 18 June 2026.
This study presents a wearable textile‐based triboelectric nanogenerator (T‐TENG) using sprayed graphene enhanced with a PVA adhesion layer. The graphene‐based electrode demonstrates high electrical conductivity and robustness to multiple bends. The fabricated T‐TENG provides stable and efficient output, with strong responsiveness to biomotion.
Hongyang Dang, Benji Fenech‐Salerno, Antonio Alessio Leonardi, Federico La Barbera, Felice Torrisi   +4 more
wiley   +1 more source

Comparative Analysis of Space Vector Pulse-Width Modulation Techniques of Three-Phase Inverter to Minimize Common Mode Voltage and/or Switching Losses

Mathematics
Inverter-based systems encounter significant challenges in mitigating common-mode voltage (CMV) and minimizing inverter losses. Despite various space vector pulse-width modulation (SVPWM) techniques proposed to address these issues, a comprehensive ...
Kotb B. Tawfiq, Peter Sergeant, Arafa S. Mansour   +2 more
doaj   +1 more source