Results 81 to 90 of about 5,225 (215)

Study of the generator/motor operation of induction machines in a high frequency link space power system [PDF]

open access: yes
Static power conversion systems have traditionally utilized dc current or voltage source links for converting power from one ac or dc form to another since it readily achieves the temporary energy storage required to decouple the input from the output ...
Lipo, Thomas A., Sood, Pradeep K.
core   +1 more source

Amazonian drought of 2023: Environmental conditions relevant to fishes

open access: yesJournal of Fish Biology, Volume 108, Issue 3, Page 803-823, March 2026.
Abstract This paper provides a platform for the following studies within this Special Issue. ‘Ecophysiology of fishes in the two great tributaries of the Amazon in the Anthropocene’. It documents the water quality conditions and accompanying zooplankton community structure and biomass relative to fish health in the Rio Negro and Rio Solimões during the
Ora E. Johannsson   +10 more
wiley   +1 more source

Backward travelling wave-variation-based protection for the transmission line of a hybrid HVDC system

open access: yesThe Journal of Engineering, 2019
The hybrid high-voltage direct current (HVDC) transmission system comprising a line-commutated converter (LCC) on the rectifier side and a voltage source converter (VSC) on the inverter side combines the advantages of both LCC and VSC.
Yanting Wang, Baohui Zhang, Baohui Zhang
doaj   +1 more source

A lightweight electronically commutated dc motor for electric passenger vehicles [PDF]

open access: yes
A functional model breadboard converter and a rare-earth-cobalt, permanent magnet motor; as well as an engineering model converter and PM motor suitable for vehicle installations were developed and tested.
Echolds, E. F., Walla, P. S.
core   +1 more source

Solidifying Power Electronics [Historical] [PDF]

open access: yes, 2018
More than one century ago, in 1902, American engineer Peter Cooper Hewitt (1861\u20131921) derived the mercury arc-rectifier, enclosed in a glass bulb, from his mercury-vapor lamp of the previous year.
Guarnieri, Massimo
core   +1 more source

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks [PDF]

open access: yes, 2019
In the last decade, distribution systems are experiencing a drastic transformation with the advent of new technologies. In fact, distribution networks are no longer passive systems, considering the current integration rates of new agents such as ...
Barragán Villarejo, Manuel   +4 more
core   +1 more source

Distributed photovoltaic systems: Utility interface issues and their present status. Intermediate/three-phase systems [PDF]

open access: yes
The interface issues between the intermediate-size Power Conditioning Subsystem (PCS) and the utility are considered.
Das, R. L., Klein, J. W., Macie, T. W.
core   +1 more source

Development of a drive system for a sequential space camera contract modification 4(S) [PDF]

open access: yes
The brush type dc motor and clutch were eliminated from the design of the 16 mm space sequential camera design and replaced by an electronically commutated motor. The new drive system reduces the current consumption at 24 fps to 220 mA.
Lund, D. L.   +3 more
core   +1 more source

Single phase matrix converter for radio frequency induction heating [PDF]

open access: yes, 2006
Conventional converters for radio frequency induction heating usually follow an AC-DC-AC structure, which can exhibit non-unity power factor and introduce large harmonic currents into the utility supply.
Bingham, Chris   +3 more
core   +1 more source

Applicability analysis of travelling wave protection for the hybrid HVDC system

open access: yesThe Journal of Engineering, 2019
The hybrid high-voltage direct current (HVDC) system, in which the rectifier is made up of the line commutated converter (LCC) and the inverter is composed of the modular multilevel converter (MMC), has quite different fault characteristics from the ...
Shaojie Cheng   +3 more
doaj   +1 more source

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