Results 41 to 50 of about 4,753,988 (311)

Non-isolated high step-up DC–DC converter adopting auxiliary capacitor and coupled inductor

open access: yesJournal of Modern Power Systems and Clean Energy, 2017
For grid-connected power system based on photovoltaic (PV) source and fuel cells, high step-up and high-efficiency DC–DC converters are needed, due to the bus voltage of the grid-connected inverter is much higher than the output voltage of PV and fuel ...
Gang WU, Xinbo RUAN, Zhihong YE
doaj   +1 more source

Effective battery charging system using step voltage and step duty size-based MPPT controller for solar PV system

open access: yesEnergy Reports, 2023
Solar energy is an excellent source of renewable energy, despite its intermittent nature that can pose a challenge. To meet load demand, a converter is required to integrate the system.
Indresh Yadav   +3 more
doaj   +1 more source

Analysis of the Influence of Complex Terrain around DC Transmission Grounding Electrodes on Step Voltage

open access: yesEnergies
The distribution of renewable energy sources is geographically limited. In the process of long-distance transmission, the direct current flowing from a ground electrode into the ground will cause a higher step voltage, which will bring serious security ...
Qi Xiong   +4 more
doaj   +1 more source

Time-division-multiplex control scheme for voltage multiplier rectifiers

open access: yesThe Journal of Engineering, 2017
A voltage multiplier rectifier with a novel time-division-multiplexing (TDM) control scheme for high step-up converters is proposed in this study. In the proposed TDM control scheme, two full-wave voltage doubler rectifiers can be combined to realise a ...
Bin-Han Liu, Jen-Hao Teng, Wei-Lun Tsai
doaj   +1 more source

Tapped-inductor bi-directional Cuk converter with high step-up/down conversion ratio and its optimum design

open access: yesScientific Reports, 2022
A bidirectional DC–DC converter is required for an energy storage system. High efficiency and a high step-up and step-down conversion ratio are the development trends.
Hongxing Chen   +3 more
doaj   +1 more source

Are Fertility Preservation Procedures Before Gonadotoxic Therapy and Hematopoietic Stem Cell Transplantation Feasible and Safe in Very Young Children? A Retrospective Cohort Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Fertility preservation (FP) is increasingly integrated into the care of pediatric patients exposed to gonadotoxic therapy or conditioning for hematopoietic stem cell transplantation (HSCT), yet perioperative data in infants and toddlers remain scarce.
Kerstin Saalabian   +13 more
wiley   +1 more source

Double Dual High Step-Up Power Converter with Reduced Stored Energy

open access: yesEnergies, 2023
This paper introduces a dual-switchhigh step-up DC-DC power converter. The proposed converter features a high step-up voltage gain, relatively low cumulative stored energy over its inductors, low voltage stress on the active switches, and high efficiency,
Hector R. Robles-Campos   +4 more
doaj   +1 more source

Influence of moisture in step-voltage measurements of PVDF

open access: yesJournal of Physics D: Applied Physics, 1992
Step-voltage current measurements carried out with commercial poly(vinylidene fluoride) (PVDF) under vacuum showed a prominent peak in the charging current when a sample had previously been in contact with a humid environment. This effect tends to disappear in subsequent measurements performed under the same experimental conditions, giving evidence ...
Faria, R. M., Nogueira, J. S., Alves, N.
openaire   +3 more sources

4-Node Test Feeder with Step Voltage Regulators

open access: yes, 2018
This work has two main contributions; First, the development of a general, exact and standardized Step Voltage Regulator model considering all possible configurations and second, the proposal of a 4-Node Test System for testing and evaluation of three ...
C. González-Morán   +3 more
semanticscholar   +1 more source

Feasibility and Safety of Somato‐Cognitive Coordination Therapy for Cerebellar Ataxia Following Pediatric Brain Tumor Treatment

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Cerebellar ataxia after pediatric brain tumor treatment can cause persistent gait, balance, and speech impairment, yet no established rehabilitation strategy exists. Somato‐cognitive coordination therapy (SCCT) is a virtual reality–guided intervention designed to promote sensorimotor integration through visually constrained reaching
Masanobu Takeuchi   +10 more
wiley   +1 more source

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