Results 201 to 210 of about 475,480 (267)
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IEEJ Transactions on Electrical and Electronic Engineering, 2021
A simple thermal computation procedure of a metal oxide varistor (MOV) element, in which an impulse current is injected, is presented. The heat in the MOV, composed of many small cells, is computed with the discretized heat transport equation.
Tokuya Tanaka, Yoshihiro Bába
exaly +2 more sources
A simple thermal computation procedure of a metal oxide varistor (MOV) element, in which an impulse current is injected, is presented. The heat in the MOV, composed of many small cells, is computed with the discretized heat transport equation.
Tokuya Tanaka, Yoshihiro Bába
exaly +2 more sources
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021
The power electronic switches have great influences on the performance of the hybrid dc circuit breaker (DCCB). Recently, the integrated gate commutated thyristor (IGCT) is considered to be a suitable alternative full-control power device due to its high
Qiang Yi, Fei Yang, Yifei Wu
exaly +2 more sources
The power electronic switches have great influences on the performance of the hybrid dc circuit breaker (DCCB). Recently, the integrated gate commutated thyristor (IGCT) is considered to be a suitable alternative full-control power device due to its high
Qiang Yi, Fei Yang, Yifei Wu
exaly +2 more sources
IEEE Transactions on Electromagnetic Compatibility, 2020
A simple mathematical expression for nonlinear resistive properties of metal oxide varistor (MOV) elements is proposed for electromagnetic and surge simulations using the finite-difference time-domain (FDTD) method.
Tokuya Tanaka +2 more
exaly +2 more sources
A simple mathematical expression for nonlinear resistive properties of metal oxide varistor (MOV) elements is proposed for electromagnetic and surge simulations using the finite-difference time-domain (FDTD) method.
Tokuya Tanaka +2 more
exaly +2 more sources
Change of Varistor Voltage of Metal-oxide Varistor Influenced by Impulse Currents
IEEJ Transactions on Power and Energy, 2015Naoyuki Tsukamoto
exaly +2 more sources
IEEE Transactions on Circuits and Systems II: Express Briefs, 2020
Metal–oxide varistor (MOV) is a kind of special ceramic which can be used for square pulse forming based on its nonlinear electrical characteristics.
Yancheng Cui, Qilin Wu, Hanwu Yang
exaly +2 more sources
Metal–oxide varistor (MOV) is a kind of special ceramic which can be used for square pulse forming based on its nonlinear electrical characteristics.
Yancheng Cui, Qilin Wu, Hanwu Yang
exaly +2 more sources
The physics of metal oxide varistors
Journal of Applied Physics, 1975This paper outlines our present understanding of the conduction mechanisms and physical processes relevant to the performance of ZnO−based ceramic varistors. Varistor behavior is determined by the gross ceramic microstructure of the device as well as by the localized conduction processes which occur between grains. We show that the qualitative features
Lionel M. Levinson, H. R. Philipp
openaire +1 more source
ac properties of metal-oxide varistors
Journal of Applied Physics, 1976Measurements of the small-signal ac response of ZnO-based ceramic varistors are reported for frequencies f in the range 30<f<108 Hz and temperatures T in the range −200<T<300 °C. The high effective varistor dielectric constant results from the device microstructure with no detectable electrode contribution.
Lionel M. Levinson, H. R. Philipp
openaire +1 more source
Durability Analysis of Metal Oxide Varistor under Direct Current Switching Surges
2020 International SAUPEC/RobMech/PRASA Conference, 2020The circuit-break switch of a direct current (DC) system will have to dissipate any stored residual line inductance energy during the switch-off period.
D. van Niekerk, P. Bokoro
semanticscholar +1 more source
Thermal Runaway in Metal Oxide Varistors
MRS Proceedings, 1981ABSTRACTThe 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.
Martin A. Seitz +2 more
openaire +1 more source
The Effect of Electrical and Moisture Degradation of Metal Oxide Varistor with Insulation Diagnosis
IEEE International Conference on Condition Monitoring and Diagnosis, 2020Condition based monitoring of surge arresters (SA) has become a primary concern to ensure power supply quality on medium and high voltage networks. Understanding of SA behavior helps forecast their failure.
C. Chuayin +3 more
semanticscholar +1 more source