Results 61 to 70 of about 457 (219)
International Journal of Ceramic Engineering &Science, Volume 7, Issue 2, March 2025.In this paper, a method to improve the performance of varistor with the help of computational model was presented and verified by experiments. Abstract This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties.
Xiao Lei +5 more
wiley +1 more source
Advancements in wearable heart sounds devices for the monitoring of cardiovascular diseases
SmartMat, Volume 6, Issue 1, February 2025.This article presents the recent advancements in wearable and flexible heart sound devices, focusing on their mechanics, types of sensors, flexible sensing materials, and prospective denoising techniques. Furthermore, the potential applications of heart sounds for the monitoring of cardiovascular diseases are reviewed as well along with its future ...
Rafi u Shan Ahmad +5 more
wiley +1 more source
Lightning protection for power transformers of Aqaba Thermal Power Station
Archives of Electrical Engineering, 2020 In this paper, a study of the lightning phenomenon and its harmful effect on Aqaba Thermal Power Station (ATPS), located in the south-western border of Jordan, is presented using the Electromagnetic Transients Program – Alternative Transients Program ...
Wael Fawzi Abu Shehab +2 more
doaj +1 more source
, 2022 This article presents an original experimental method applied to assess the stability limits of a given Metal Oxide Varistor (MOV), with cylindrical symmetry (cylinder or disk shape), as a direct relation between the ambient temperature and the service ...
Petru Andea +4 more
core +1 more source
Mechanism and suppression of breaking overvoltage of DC circuit breakers
High Voltage, Volume 10, Issue 1, Page 32-46, February 2025.Abstract The occurrence of breaking overvoltage in a DC circuit breaker (DCCB) poses a potential threat to the safe operation of a DC grid. Based on the structure of the ±10 kV three‐terminal DC distribution network, this paper sets up the medium‐voltage DCCB and formulates a fault protection strategy.
Lu Qu +7 more
wiley +1 more source
Electron paramagnetic resonance study of ZnO varistor material
, 2014 Matsuoka-type zinc oxide (ZnO) varistor material was synthesized using a conventional solid-state reaction method. X-band electron paramagnetic resonance (EPR) data revealed that Mn ions substitute in the ZnO lattice with a 2+ paramagnetic state. Co ions
Zierep, Paul +4 more
core +1 more source
High Voltage, Volume 10, Issue 1, Page 78-87, February 2025.Abstract Metal oxide varistors (MOVs) are extensively employed in DC circuit breakers (DCCBs) to suppress overvoltage, dissipate energy and build up voltage after interruption. Despite their widespread use, the performance of MOVs under short‐time, double energy absorption conditions is not well understood, posing a challenge to their application in ...
Chen Long +5 more
wiley +1 more source
International Journal of Ceramic Engineering &Science, Volume 7, Issue 1, January 2025.Simulation methods were used to help reveal the effect mechanism of Y, Bi, and Co dopants on ZnO varistors. It provides an important theoretical basis for the development of high‐performance varistor. Abstract ZnO varistors doped with Y2O3${\rm Y}_2{\rm O}_3$, Bi2O3${\rm Bi}_2{\rm O}_3$, and Co2O3${\rm Co}_2{\rm O}_3$ were analyzed for electrical ...
Zhengzheng Fu +7 more
wiley +1 more source
, 1981 Zinc Oxide (ZnO) Ceramics-Bismuth Oxide (Bi2O3) Metal Oxide thin film heterojunction made by sputtering technique showed a highly non-Ohmic property. The voltage-current characteristics and the dielectric properties showed dependence on Bi2O3 metal oxide
Kazuo Eda
core +1 more source
High‐Current Cryogenic DC Solid‐State Circuit Breaker for Electric Aircraft
IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.Cryogenic and superconducting technologies have great potential to significantly enhance the power density and efficiency of electric propulsion aircraft. This paper presents the design of a 300 V/1700 A DC solid‐state circuit breaker (SSCB) operating at cryogenic temperatures.
Zhongying Wang +8 more
wiley +1 more source