Results 81 to 90 of about 2,080 (218)
IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.A new evolutionary search algorithm based on improved Particle Swarm Optimisation (PSO) is introduced in this study to estimate the phasor. The performance has been evaluated through extensive simulations considering transient components, harmonics, and frequency changes in noiseless and noisy conditions.
Seyedeh Mina Abed Shiadeh +2 more
wiley +1 more source
A Self‐powered LVDC Solid‐State Circuit Breaker Using Low Voltage Step‐Up DC/DC Converter
IET Power Electronics, Volume 19, Issue 1, January/December 2026.This paper introduces a self‐powered LVDC solid‐state circuit breaker that harvests the forward drop of a Schottky diode via an ultra‐low voltage step‐up converter, eliminating the need for an auxiliary supply. A parallel MOSFET‐SCR conduction path and a Hall‐effect‐based electromagnet enable autonomous fault detection and tripping for both fast and ...
Dewan Mohammad Asad +3 more
wiley +1 more source
Improving current sharing between parallel varistors
, 2001 Metal oxide varistors are widely used in many power electronics circuits to protect against transient over voltages. Certain applications can be very demanding on the energy handling capability of the varistors.
Ahmed, Mohamed Mostafa Ramadan +2 more
core
Thermal Runaway in Metal Oxide Varistors
, 1981 The conditions leading to thermal runaway in metal oxide varistors are discussed in terms of its power dissipation. An equivalent circuit is used to rationalize the similarities and differences between the DC and 60 Hz ac behavior.
Mike E. Potter +2 more
core +1 more source
, 2010 This work presents the most relevant aspects of the SnO2 based varistors technology and a comparative study of its non linear behavior in relation to ZnO (modified Matsuoka system) varistors.
Longo, E. [UNESP] +5 more
core
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2014 Prolonged exposure of zinc oxide varistors to the electrical load leads to current-voltage characteristics (CVC) deformation, which is associated with a change in the height and width of the intergranular barriers, which are the main structural element ...
A. S. Tonkoshkur, A. V. Ivanchenko
doaj +1 more source
The effects of Cu dopant on the microstructure and non-ohmic electrical properties of ZnO varistors
, 2011 The doping effects of Cu on the microstructure and non-ohmic electrical properties of ZnO varistors were studied. Addition of Cu2O can enhance the ZnO grain growth during sintering. The SEM and EDS results revealed that the added Cu mainly distributed in
Fan, Jiwei +15 more
core +1 more source
Degradation and recovery of ZnO varistors
, 2006 In the present work it was studied the main aspect that influences on degradation and physical-chemical properties at grain-boundary region of metal oxide varistors and its consequences on microstructure and nonohmic electric properties.
Ramírez, M. A. [UNESP] +10 more
core +1 more source
Measuring the energy handling capability of metal oxide varistors [PDF]
, 2001 Metal oxide varistors are widely used in many power electronics circuits to protect against transient over voltages. Certain applications are very demanding on the energy handling capability of the varistors.
Putrus, G.A. +3 more
core
Influence Mechanism of Micro Grain-boundary Parameters to the Electrical Properties of ZnO Varistor
工程科学与技术ZnO varistors exhibit excellent nonlinear voltage–current characteristics and substantial energy capacity, enabling them to absorb impulse energy during power system overvoltages and thus protect the electrical equipment.
Pengfei MENG +6 more
doaj