Results 11 to 20 of about 4,140,882 (287)

Short-circuit currents in turbogenerators

open access: yes, 1979
The thesis is concerned with an investigation of several aspects of the short-circuit currents which arise in turbogenerators. Of particular interest is the phenomenon that one or more of the armature currents may not pass through zero for a considerable
Lek-Suan Lim (7202228)
core   +7 more sources

Efficient Fault Detection of Rotor Minor Inter-Turn Short Circuit in Induction Machines Using Wavelet Transform and Empirical Mode Decomposition

open access: yesSensors, 2023
This paper introduces a novel approach for detecting inter-turn short-circuit faults in rotor windings using wavelet transformation and empirical mode decomposition.
Attiq Ur Rehman   +6 more
doaj   +1 more source

Calculation and Investigation of Steady-State Asymmetric Modes of Three-Windings Three-Legs Power Transformer with Star/Star/Delta Windings Connection [PDF]

open access: yesProblems of the Regional Energetics, 2018
For the purpose of calculation and studying of steady-state asymmetrical modes of operation of three-windings, three-leg power transformer with an arbitrary winding connection scheme the mathematical model is proposed.
Bosneaga V., Suslov V.
doaj   +1 more source

Asymmetric Electrokinetic Energy Conversion in Slip Conical Nanopores

open access: yesNanomaterials, 2022
Ion current rectification (ICR) phenomena in asymmetric nanofluidic structures, such as conical-shaped nanopores and funnel-shaped nanochannels, have been widely investigated in recent decades.
Chih-Chang Chang
doaj   +1 more source

The energetics of gas flow and contact erosion during short circuit arcing [PDF]

open access: yes, 2004
The processes governing the movement of short circuit arcs in circuit breakers are complex and variable and the detailed understanding of these processes is incomplete.
Weaver, P.M.   +2 more
core   +1 more source

Current limiting strategy for grid-connected inverters under asymmetrical short circuit faults

open access: yesInternational Journal of Electrical Power & Energy Systems, 2021
Abstract Grid-connected inverter plays an essential role as an interface between energy resources and the power grid. The performance of the inverters is adversely affected by the grid disturbances such as imbalances and asymmetrical short circuit faults. Then, it is necessary to enhance the functionality of the inverter under such conditions.
Seyed Fariborz Zarei   +2 more
openaire   +1 more source

Analysis of short-circuit transients in the LHC main dipole circuit [PDF]

open access: yes, 2019
After the occurrence and detection of a short circuit to ground in the LHC main dipole circuit, a fast power abort is triggered and the current in the circuit starts decaying semi-exponentially from a maximum value of 11.85 kA to zero, with a time ...
Maciejewski, M   +21 more
core   +2 more sources

A change-detection algorithm for short-circuit fault detection in closed-loop AC drives [PDF]

open access: yes, 2013
This paper deals with an on-line method for turn-to-turn short-circuit fault detection in low-voltage permanent-magnet synchronous machine drives. Due to the closed-loop control, the fault effects are reflected in the voltage.
Johan Gyselinck   +10 more
core   +1 more source

IGBT Junction Temperature Measurement Under Active-Short-Circuit and Locked-Rotor Modes in New Energy Vehicles

open access: yesIEEE Access, 2020
Active-short-circuit and locked-rotor modes are common abnormal operations in new energy vehicles. The IGBT junction temperature measurement for these two operating conditions is a challenging problem due to the unexpected large current and the ...
Yuan Zhu   +5 more
doaj   +1 more source

Researching the Blocking of Current Protection of Electrical Power Units with Transformers

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2020
The magnetizing current inrush appears in electrical power units equipped with transformers in case of no-load energizing of the power transformers and in a number of other cases.
F. A. Romaniuk   +4 more
doaj   +1 more source

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