Results 81 to 90 of about 2,070 (218)
Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.Abstract Microstructure homogeneity and grain size reduction are needed to ensure the current uniformity and reliability required in metal oxide varistors for DC circuit breakers. Cold sintering (CS)–a low‐temperature digestive liquid and high‐pressure densification process–has previously shown reduced grain growth, but it is not clear how the lower ...
Kayla Y. Chuong +5 more
wiley +1 more source
International Journal of Energy Research, Volume 2026, Issue 1, 2026.Automatic generation control (AGC) is vital for preserving frequency and power balance in modern interconnected power systems (IPSs), which are increasingly challenged by nonlinear dynamics, parameter uncertainties, and unpredictable load variations.
Getaneh Mesfin Meseret, Mohammad Ghiasi
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