Effect of a ripple current on the efficiency of a PEM electrolyser
Results in Engineering, 2021 The aim of this study was to determine how the efficiency of a proton exchange membrane (PEM) electrolyser is affected by an electric ripple current and the different characteristics of the ripple current (frequency, amplitude and waveform).
Rupert Gouws +2 more
exaly +3 more sources
A two-stage dc–dc converter with high voltage gain and reduced current ripple for efficient PV energy harvesting [PDF]
Scientific ReportsPV systems require a dc–dc converter to operate at the maximum power point (MPP). However, switching based operation of these converters causes ripple current.
Hakan Akca
doaj +2 more sources
Analysis and Control of Current Ripples of Z-Source Inverters [PDF]
IEEE Access, 2020 Load current ripple is an important issue in the design and control of inverters since it influences the torque ripple and noise amplitude of a motor drive. The current ripple of Z-source inverter (ZSI) is analyzed in this paper.
Dong Shuai, Zhang Qianfan
doaj +2 more sources
Control of Ripple Eliminators to Improve the Power Quality of DC Systems and Reduce the Usage of Electrolytic Capacitors [PDF]
IEEE Access, 2016 The problem of voltage/current ripples has become a primary power quality issue for dc systems, which could seriously degrade the performance on both the source side and the load side and lead to reliability concerns.
Qing-Chang Zhong +3 more
doaj +3 more sources
Input current ripple reduction of DC/DC converters
Energy Reports, 2023 The input current ripple problem of DC/DC converters receives more and more attention recently. To meet the increasingly demanding requirements, the fundamental components of the current ripple are researched and the corresponding current ripple ...
Xinyi Zhu +6 more
doaj +1 more source
On the formation of current ripples [PDF]
Scientific Reports, 2015 AbstractFor grain sizes finer than coarse sand, the first flow-transverse bedforms to develop are current ripples. Although numerous studies have analysed different aspects of bedform morphodynamics, to date no comprehensive physical explanation for the formation of ripples has been given.
Bartholdy, Jesper +5 more
openaire +3 more sources
Brushless DC Motor Current Prediction Torque Ripple Suppression
Journal of Harbin University of Science and Technology, 2020 Aiming at the torque ripple problem of brushless DC motor, a current predictive control method combined with commutation overlap method is proposed to suppress the commutation torque ripple Based on the analysis of the cause of the commutation torque ...
LDegang, ZHANG Chenguang, HOU Zhengdong
doaj +1 more source
Impact of Current Pulsation on BLDC Motor Parameters
Sensors, 2021 BrushLess Direct-Current (BLDC) motors are characterized by high efficiency and reliability due to the fact that the BLDC motor does not require power to the rotor. The rotor of the BLDC motor consists of permanent magnets. When examining the waveform of
Andrzej Sikora, Marcin Woźniak
doaj +1 more source
Accurate Efficiency and Power Densities Optimization of Output Inductor of Buck Derived Converters
Applied Sciences, 2022 In this article, inductor loss models are developed based on the experimental characterization of off-the-shelf components. The modelling steps and techniques are described and validated.
Hugot Pichon +2 more
doaj +1 more source
Investigation of current-ripple for three-phase four-wire inverter-fed motors
Energy Reports, 2020 The three-phase four-wire drive system (4wEL) has been proved to be available of realizing fault-tolerant operation. However, this type of electric drive system (EDS) still has problems of higher current ripple than traditional three-wire EDSs.
Zhao Zhao, Roberto Leidhold
doaj +1 more source