Results 21 to 30 of about 881,309 (308)

Carbon brush wear calculation in marine environment based on temperature field analysis

IET Renewable Power Generation, 2022
In the marine environment, the working environment of the doubly fed wind generator carbon brush and slip‐ring system is complicated, salt spray deposits and seawater erosion affect the temperature field and contact surface friction factor leading to ...
Zhao Shuai, Ma Hongzhong, Cheng Long
doaj   +1 more source

Multi-Field Coupling Simulation and Temperature Prediction Method of Plum Blossom Contact in High Voltage Switchgear

Journal of Applied Science and Engineering, 2022
Overheat of plum blossom contact is a typical fault of high voltage switchgear, which is a big hidden danger of stable operation of the power system. In this paper, the electrical thermal structural coupling simulation of plum blossom contact is realized
Yunfeng Jiang, Lipeng Ji, Rugang Tian, Yang Li, Xuanliang Yu, Zeqing Li   +5 more
doaj   +1 more source

Current-Carrying Performance Degradation Mechanisms of Outdoors Power Connectors Under External Vibrations

Vibration
The environmental adaptability of outdoor power connectors exerts a crucial influence on the reliability of electrical systems. In this work, the current-carrying performance degradation of commercial power connectors under forced mechanical vibration ...
Chao Zhang, Chang Sun, Wanbin Ren, Yuchen Liao, Ming Li, Jian Liu   +5 more
doaj   +1 more source

Multi-Physics Finite Element Model of Relay Contact Resistance and Temperature Rise Considering Multi-Scale and 3D Fractal Surface

IEEE Access, 2020
Contact resistance of the main circuit is an important parameter for measuring the performance and reliability of relay products. The contact resistance value interacts with the stress and temperature of the contact surface during the relay's operation ...
Ruyao Li, Wenying Yang, Huimin Liang
doaj   +1 more source

The Analysis of the Thermal Processes Occurring in the Contacts of Vacuum Switches During the Conduction of Short-Circuit Currents

Energies
This article presents the results of research on the thermal state of vacuum switch contacts during the conduction of short-circuit currents. This state is directly related to the value of the flowing current and the operating conditions of the switch ...
Karol Nowak, Krzysztof Nowak, Slawomir Rabczak   +2 more
doaj   +1 more source

Temperature Activates Contact Aging in Silica Nanocontacts

Physical Review X, 2019
Understanding the time evolution of contact strength in silica nanocontacts is of great fundamental and practical relevance in diverse areas like earthquake dynamics, wafer bonding mechanisms, as well as MEMS applications.
Matthias Vorholzer, J. G. Vilhena, Ruben Perez, Enrico Gnecco, Dirk Dietzel, André Schirmeisen   +5 more
doaj   +1 more source

Particle size of insecticidal suspensions and their contact toxicity vi. Effect of temperature on relative toxicity

, 1957
Two aqueous suspensions, one containing crystals of uniform size and the other containing colloidal particles, were made with each of seven solid contact poisons (two DDT-analogues, DDT, rotenone, 2-bromomercurithiophen, dieldrin and endrin).
Mcintosh, A. H.
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

NON-CONTACT METHOD OF MEASURING SURFACE TEMPERATURE

Российский технологический журнал, 2019
A non-contact method is proposed for measuring the surface temperature of an object using a standard radiator and standard object having optico-physical properties identical to those of the monitored object.
V. K. Bityukov, V. I. Nefedov, D. S. Simachkov   +2 more
doaj   +1 more source

Contact with the host plant enhances aphid survival at low temperature

, 1997
1. The hypothesis, suggested by previous studies, that host plant contact reduces the cold tolerance of anholocyclic aphids was tested under laboratory conditions.
Harrington, R., Butts, R. A., Bone, W., Howling, G. G., Bale, J. S.   +4 more
core   +1 more source