Results 31 to 40 of about 328,930 (302)

A Three-Coil Inductively Power Transfer System with Constant Voltage Output

open access: yesEnergies, 2018
For a traditional 2-coil system outputting constant voltage (CV), the transfer efficiency decreases drastically as transfer distance increases. To solve this problem, this essay proposes a 3-coil system which could achieve CV output and Zero Phase Angle (
Ruikun Mai   +4 more
doaj   +1 more source

Research on a maximum efficiency and constant voltage output control technology for wireless power transfer system

open access: yesDianzi Jishu Yingyong, 2020
Aiming at the problems of constant voltage output and maximum efficiency of wireless power transfer technology, a wireless power transfer technology based on energy injection and phase-shifted constant voltage control methods is proposed.
Shen Pengfei, Xie Yue
doaj   +1 more source

Designing and Prototyping of Lithium-Ion Charging System Using Multi-Step Constant Current Method

open access: yesWorld Electric Vehicle Journal, 2022
The need for electrical energy means batteries have a critical role in technological developments in the future. One of the most advanced types of batteries is the lithium-ion battery.
Muhammad Nizam   +4 more
doaj   +1 more source

Analysis of the Dynamic Performance of Self-Excited Induction Generators Employed in Renewable Energy Generation [PDF]

open access: yes, 2014
Incentives, such as the Feed-in-tariff are expected to lead to continuous increase in the deployment of Small Scale Embedded Generation (SSEG) in the distribution network.
Farrag, Mohamed E.A.; id_orcid   +7 more
core   +1 more source

Space charge dynamics in oil and thick pressboard combined system under polarity reversal voltage [PDF]

open access: yes, 2014
In this study, the space charge dynamics in an oil and oil impregnated pressboard combined insulation system are investigated by the means of pulsed electroacoustic (PEA) technique under voltage polarity reversal conditions. To be closer to the real case
Hao, Miao   +9 more
core   +1 more source

Self-Commissioning of Inverter Nonlinear Effects in AC Drives [PDF]

open access: yes, 2012
The paper presents a novel technique for an accurate identification of the inverter nonlinear effects, such as the dead-time and on-state voltage drops. The proposed technique is very simple and it is based only on a current control scheme.
Rosu, S.G.   +10 more
core   +1 more source

Investigation on the Operating Conditions of Proton Exchange Membrane Fuel Cell Based on Constant Voltage Cold Start Mode

open access: yesEnergies, 2021
The cold start property is one of the main factors restricting the fuel cell application in the automotive field. The constant voltage cold start method of the fuel cell works under low start voltage and produces high heat, which can shorten the start-up
Yanbo Yang   +4 more
doaj   +1 more source

The influence of frequency of AC component on space charge behaviours in polyethylene under combined AC and DC electric fields [PDF]

open access: yes, 2014
Combined ac and dc voltages may occur in high voltage power transmission system, which bring challenges to the dielectric materials. Generally speaking, space charge is well recognised under high voltage dc conditions but has received little attention ...
C. Zhou   +3 more
core   +1 more source

The Electrical Motorcycle Charger for Application in a Residence [PDF]

open access: yesE3S Web of Conferences, 2020
The aim of this paper is to design the charger for an electric motorcycle and analyze the behavior of voltage and current value during charging. The AC voltage supply from a residence is converted to DC voltage to charge the energy storage system by ...
Jettanasen Chaiyan, Pothisarn Chaichan
doaj   +1 more source

Comparison of Electrical Measurements on Constant Voltage and Constant Current ECT Machines [PDF]

open access: yesBritish Journal of Psychiatry, 1987
Electrical measurements were made during treatment of two groups of patients, one group receiving treatment from a constant current ECT machine and the other from a constant voltage machine. The electrical impedance and energy were calculated and compared for the two groups. More energy was delivered by the constant voltage than by the constant current
R, Railton   +3 more
openaire   +4 more sources

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