Results 41 to 50 of about 41,086 (208)

Electronically resettable fuse Patent [PDF]

open access: yes, 1971
Development and characteristics of electronically resettable fuse with saturable core current sensing transformer having two outside legs and center ...
Genter, R. E.
core   +1 more source

Waveshape recognition technique to detect current transformer saturation

open access: yesIET Generation, Transmission & Distribution, 2015
This study presents a technique to identify current transformer (CT) saturation based on waveshape properties of the CT secondary current. First, a variable‐length window, designated as the symmetry assessment window (SAW), is defined. Certain distinctive features of the distorted and undistorted currents inside the SAW are extracted by defining two ...
Ali Hooshyar, Majid Sanaye‐Pasand
openaire   +1 more source

Design and applicability analysis of independent double acquisition circuit of all-fiber optical current transformer

open access: yesGlobal Energy Interconnection, 2019
The advantages of the all-fiber optical current transformer include but are not limited to being small in size, having no magnetic saturation, exhibiting high measurement accuracy, and boasting strong electromagnetic interference resistance. However, the
Songlin Gu   +5 more
doaj   +1 more source

Analysis of excitation characteristics of transformers with different core shapes under severe DC bias

open access: yesEnergy Reports, 2022
When a transformer is in the DC bias state, a series of consequences will occur. Mainly including excitation current distortion, losses increase, hot spot temperature rise and vibration and noise increase, these consequences are not conducive to the safe
Yidan Hu, Junhao Li
doaj   +1 more source

Binary magnetic memory device Patent [PDF]

open access: yes, 1965
Nondestructive interrogating and state changing circuit for binary magnetic storage ...
Schaefer, D. H.
core   +1 more source

Research on Interference Mechanism of 25 Hz Phase Sensitive Track Equipment from Unbalanced Current

open access: yesApplied Sciences, 2023
In a 25-Hz phase-sensitive track circuit, traction backflow is unevenly distributed in the two rails, resulting in interference caused by the 50 Hz unbalanced current, which leads to misoperation of relays and other equipment in the circuit.
Lei Wang   +6 more
doaj   +1 more source

Increasing efficiency of switching type regulator circuits Patent [PDF]

open access: yes, 1968
Switching series regulator with gating control ...
Clapp, W. M.
core   +1 more source

Review of methodologies used for detection of magnetising inrush and fault conditions in power transformer

open access: yesIET Energy Systems Integration, 2021
Reliable and dedicated protection of the transformer is the main requirement in the power system due to the supervision of a highly expensive equipment transformer. Non‐linear characteristics of the transformer give mysterious behaviour for the period of
Maulik Raichura   +2 more
doaj   +1 more source

Low current linearization of magnetic amplifier for dc transducer [PDF]

open access: yes, 1981
A magnetic amplifier having two saturable reactor cores with a separate excitation winding on each connected in series opposition, a common control winding, and a common output winding, is adapted for use as a low level signal transducer.
Nagano, S.
core   +1 more source

Suppression of common-mode voltage in a PWM rectifier/inverter system [PDF]

open access: yes, 2001
This paper proposes a PWM rectifier/inverter system capable of suppressing not only supply harmonic currents but also electromagnetic interference (EMI).
Akagi, Hirofumi, Ogasawara, Satoshi
core   +1 more source

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