Results 41 to 50 of about 6,480 (133)

From Diagnosis to Disease Staging: Multisite Validation of Cerebrospinal Fluid Molecular Tests in Multiple Sclerosis

Annals of Neurology, EarlyView.
Objective The growing demand for personalized treatment in multiple sclerosis (MS) highlights the need for more precise biomarkers that can outperform magnetic resonance imaging and clinical assessment in patient stratification. Advances in multiplex proteomic technologies suggest that cerebrospinal fluid (CSF) analysis at MS onset may not only improve
Laura Ghezzi, Peter Kosa, Mark Greenwood, Enrique Alvarez, C.L. Freedman, Anne H. Cross, Francesca Pace, Mark S. Freedman, Joanna Kocot, Laura Piccio, Bibiana Bielekova   +10 more
wiley   +1 more source

Sub-assembly experiments to determine PWM supply-induced losses in electric machines

The Journal of Engineering, 2019
This paper presents a low-cost approach to experimentally characterise the effect of the inverter supply on the losses in an electrical machine. The set-up comprises of representative subassemblies of the stator and winding, referred to as ‘motorettes ...
Jonathan Godbehere, Andrew Hopkins, Andrew Hopkins, David Drury, Phil Mellor   +4 more
doaj   +1 more source

Advanced Virtual Impedance for Power‐Sharing Improvement in Microgrids Using Different SOGI Methods: A Comparative Study

Energy Technology, EarlyView.
Advanced virtual impedance control integrating multiple second‐order generalized integrator (SOGI) variants—SOGI, ESOGI, MSOGI, and DSOGI—enhances power and harmonic sharing accuracy in islanded microgrids. The comparative study quantifies performance–complexity trade‐offs, demonstrating up to 65% total harmonic distortion (THD) reduction and improved ...
Camelia Ait Hammouda, Abdellah Benallal, Rafik Bradai, Adrian Ilinca   +3 more
wiley   +1 more source

A two-level voltage source inverter with differentially sinusoidal pulse width modulation used in the interconnection system of a wind turbine generator

The Journal of Engineering, 2014
This study analyses an interconnection system based on differentially sinusoidal pulse width modulation, used for the interconnection to the grid of a variable speed wind turbine.
Alexandros C. Charalampidis, Antonios E. Chaniotis, Antonios G. Kladas   +2 more
doaj   +1 more source

Improving the Characteristics of the Direct FOC Strategy in DFIG‐Based Wind Turbine Systems Using FOIDD and FOPD Controllers

Energy Science &Engineering, EarlyView.
This study presents a new control strategy for doubly fed induction generator (DFIG) wind turbine systems to overcome the limitations of traditional direct field control using proportional‐integral (DFOC‐PI) regulators, which are sensitive to coefficient changes and lead to low power quality.
Hamza Gasmi, Habib Benbouhenni, Z. M. S. Elbarary, Ilhami Colak, Tahar Tafticht, Salman Arafath Mohammed   +5 more
wiley   +1 more source

Implementation of NLC‐SHM based novel PWM scheme on packed U‐cell multilevel inverter

IET Power Electronics
This article introduces a novel integrated nearest level controller (NLC) combined with selective harmonic mitigation (SHM) control approach aimed at efficiently suppressing lower‐order harmonics has been introduced.
Mohd Tariq, Shahbaz Ahmad Khan, Deepak Upadhyay, Adil Sarwar, Arif Sarwat, Pasi Peltoniemi   +5 more
doaj   +1 more source

Common mode voltage elimination in dual-inverter-fed six-phase open-end winding PMSM drives with a single DC supply

The Journal of Engineering, 2019
This paper proposes a space vector pulse width modulation (SVPWM) technique to eliminate common mode voltage (CMV) and common mode current for dual-inverter six-phase open-end winding PMSM motor drive fed from a single DC supply.
Mounir Mekasser, Qiang Gao, Cai Xu
doaj   +1 more source

High‐Fidelity Simulation‐Driven Control Framework for Robust Grid Integration of Renewable Energy Systems

Energy Science &Engineering, EarlyView.
This work proposes a high‐fidelity, simulation‐driven control framework for robust grid integration of hybrid PV–wind systems using a modular, hierarchical multi‐loop architecture with adaptive decision logic. The framework coordinates power, DC‐link voltage, and grid currents under fast load and generation changes, enabling safe exploration of extreme
Wulfran Fendzi Mbasso, Ambe Harrison, Idriss Dagal, Pradeep Jangir, Zhe Liu, Aseel Smerat   +5 more
wiley   +1 more source

Effect of Parasitic Components in Voltage Drop and Design Consideration of the Switched Impedance Inverter

IET Power Electronics
This paper investigates the impact of parasitic elements on the performance of switched impedance inverters. This work develops a non‐ideal impedance source inverter model, enabling more accurate predictions of voltage gain, current relationships, and ...
Mohsen Hasan Babayi Nozadian, Dmitri Vinnikov, Hamed Mashinchi Maheri   +2 more
doaj   +1 more source

Current derivative measurement using closed-loop hall-effect current sensor

The Journal of Engineering, 2019
This paper discusses a method of the current derivative measurement using a standard closed-loop Hall-effect current sensor. The proposed method can operate with PWM-driven inverters and provides the estimation of motor-phase inductances required for an ...
A. Anuchin, A. Zharkov, A. Zharkov, D. Shpak, D. Aliamkin, Y. Vagapov   +5 more
doaj   +1 more source