Results 61 to 70 of about 200,732 (327)

Terawatt-scale sub-10-fs laser technology - key to generation of GW-level attosecond pulses in X-ray free electron laser [PDF]

, 2004
We propose a technique for the production of attosecond X-ray pulses which is based on the use of X-ray SASE FEL combined with a femtosecond laser system. A few-cycle optical pulse from a Ti:sapphire laser interacts with the electron beam in a two-period
Ayvazyan, Ayvazyan, Baltushka, Brabec, E.A. Schneidmiller, E.L. Saldin, Emma, Hentchel, M.V. Yurkov, Paul, Reiche, Saldin, Saldin, Saldin, Saldin, Saldin, Saldin, Schroeder, Wabnitz, Yu   +19 more
core   +1 more source

Multiphase space vector pulse width modulation

IEEE Transactions on Energy Conversion, 2002
Pole-phase modulation adjusts the pole-phase ratio of an induction machine and requires a multileg, multiphase inverter. This paper analyzes an n-leg, n-phase inverter, and presents techniques for n-phase space vector pulse width modulation (SVPWM). In particular, nine-phase SVPWM is developed and implemented on a nine winding induction machine.
J. W. Kelly, E. G. Strangas, J. M. Miller   +2 more
openaire   +2 more sources

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

Advanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana, Indra Apsite, Leonid Ionov   +2 more
wiley   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

An extendable switched‐capacitor based three‐phase multilevel inverter with boosting capability

IET Power Electronics
The increasing demand for integrating renewable energy sources necessitates inverter topologies with boosting capabilities. Using inverters with boosting capability and a low number of components to integrate renewable energy sources can reduce costs ...
Hadi Aghaei, Seyed Majid Hashemzadeh, Ebrahim Babaei, Mohammad Bagher Bannae Sharifian, Atif Iqbal   +4 more
doaj   +1 more source

Optimal Hybrid Pulse Width Modulation for Three-Phase Inverters in Electric Propulsion Ships

Machines
Global interest in environmentally friendly ships has surged as a result of greenhouse gas reduction policies and the demand for carbon neutrality. Despite growing demand for electric propulsion systems, there is a lack of research and development on ...
Chan Roh, Hyeon-min Jeon, Seong-wan Kim, Jong-su Kim, Na-young Lee, Sung-woo Song   +5 more
doaj   +1 more source

ANN Controller Based Single phase Inverter in Smart City

International Transactions on Electrical Engineering and Computer Science, 2023
Solar-grid integration is a method for incorporating large amounts of photovoltaic (PV) supply to the grid. Advanced inverter technology, smart grids technology, islanding detection technology, solar-grid forecasting technology, grid-plant protection ...
HyunHo Park
doaj  

Sector Subdivision Based SVPWM Strategy of Neutral-Point-Clamped Three-Level Inverter for Current Ripple Reduction

Energies, 2019
This paper presents a sector subdivision based space vector pulse width modulation (SVPWM) strategy with reduced current ripple for a three-level inverter.
Guozheng Zhang, Bingxu Wei, Xin Gu, Xinmin Li, Zhanqing Zhou, Wei Chen   +5 more
doaj   +1 more source

Research on voltage regulation ability of four‐level nested clamp converter based on virtual space vector modulation

IET Power Electronics, 2023
The four‐level nested neutral point clamped (4L‐NNPC) converter is a new multi‐level converter with a simple topology, which is suitable for the medium‐voltage application. But it has voltage balancing problems under the low output frequency condition. A
Liangdeng Hu, Fei Xiao, Ziyue Xin
doaj   +1 more source

Pulse width modulated control of robotic manipulators

International Journal of Systems Science, 1990
A robust discontinuous feedback control scheme of the pulse width modulation (PWM) type is proposed for the regulation of angular positions of links in robotic manipulators. The discontinuous PWM controller design is carried out on the basis of the expected linearization approach for a suitably defined average PWM-controlled continuous model. >
Sira-Ramirez, Hebertt, Zribi, Mohammed, Ahmad, Shaheen   +2 more
openaire   +3 more sources