Results 11 to 20 of about 35,550 (239)

Selective Recovery of Tellurium from the Tellurium-Bearing Sodium Carbonate Slag by Sodium Sulfide Leaching Followed by Cyclone Electrowinning

Metals, 2020
The rigorous environmental requirements promote the development of new processes with short and clean technical routes for recycling tellurium from tellurium-bearing sodium carbonate slag.
Zhipeng Xu, Zoujiang Li, Dong Li, Xueyi Guo, Ying Yang, Qinghua Tian, Jun Li   +6 more
doaj   +2 more sources

An Approximate Estimation Approach of Fault Size for Spalled Ball Bearing in Induction Motor by Tracking Multiple Vibration Frequencies in Current

Sensors, 2020
Fault size estimation is of great importance to bearing performance degradation assessment and life prediction. Until now, fault size estimation has generally been based on acoustic emission signals or vibration signals; an approach based on current ...
Chidong Qiu, Xinbo Wu, Changqing Xu, Xiang Qiu, Zhengyu Xue   +4 more
doaj   +2 more sources

Chloride Resistance of Assembled Bridge Piers Reinforced with Epoxy-Coated Steel Bars

Applied Sciences
To reveal the influence of joint type and epoxy-coated steel bar surface damage on the durability of assembled bridge piers, this study simulated the potential damage to epoxy-coated steel bars at various stages of an actual construction process by ...
Dazhang Fan, Hailong Wang, Hongquan Xu, Tingquan He   +3 more
doaj   +2 more sources

Fluorescent Aromatic Polyether Sulfones: Processable, Scalable, Efficient, and Stable Polymer Emitters and Their Single-Layer Polymer Light-Emitting Diodes

Nanomaterials
In this study, fully aromatic polyether sulfones were developed, bearing blue, yellow, and orange–red π-conjugated semiconducting units. Carbazole-, anthracene-, and benzothiadiazole-based fluorophores are copolymerized with a diphenylsulfone moiety.
Konstantinos C. Andrikopoulos, Despoina Tselekidou, Charalampos Anastasopoulos, Kyparisis Papadopoulos, Vasileios Kyriazopoulos, Stergios Logothetidis, Joannis K. Kallitsis, Maria Gioti, Aikaterini K. Andreopoulou   +8 more
doaj   +2 more sources

Novel stator slot opening to reduce electrical machine bearing currents [PDF]

, 2023
Ball bearings are largely used in electrical machines, where the high frequency common mode currents affect their lifetime. This document presents a novel Zig-Zag stator slot opening geometry to reduce the winding-to-rotor capacitance Cwr with the ...
Geraint W. Jewell, De Gaetano, D., Xiao Chen, Sun, X., Xiangyu Sun, Chen, X., Wenjun Zhu, Antonio Griffo, Jewell, G.W., Zhu, W., Daniele De Gaetano, Griffo, A.   +11 more
core   +1 more source

Novel Bearing Current Suppression Approach in Doubly-Fed Induction Generators

IEEE Access, 2019
Doubly-fed induction generators (DFIGs) are widely used in the wind power generation systems. However, due to the use of the power electronic devices, such as insulated gate bipolar transistor (IGBT), it is inevitable to generate a non-zero common mode ...
Ruifang Liu, Erle Yang, Jiayao Chen, Shuangxia Niu   +3 more
doaj   +1 more source

Influence of material and thickness of slot insulation of the electric machine on the bearing voltage ratio

IOP Conference Series: Earth and Environmental Science, 2019
AbstractThe Modern electrical drive systems which able to operate in variable-speed mode became a conventional setup since power electronics-based frequency converters became wide spread. Nevertheless, specific parasitic phenomena of bearing currents always accompanying drive systems fed by frequency converters.
K Vostrov, V Frolov, V Shestakov, E Popkov, A D Mitrofanov   +4 more
openaire   +1 more source

Detection of balls bearing Incipient defect by current analysis

, 2021
47th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON), ELECTR NETWORK, OCT 13-16, 2021International audienceThe bearing problem is considered as the first factor responsible of defects in the electric machines.
Yazidi, Amine, Mahamad, Hassan Gaditto, Henao, Humberto, Betin, Franck, Segard, Eric, Vacossin, Bruno   +5 more
core   +1 more source

Intense pH Sensitivity Modulation in Carbon Nanotube-Based Field-Effect Transistor by Non-Covalent Polyfluorene Functionalization

Nanomaterials, 2023
We compare the pH sensing performance of non-functionalized carbon nanotubes (CNT) field-effect transistors (p-CNTFET) and CNTFET functionalized with a conjugated polyfluorene polymer (labeled FF-UR) bearing urea-based moieties (f-CNTFET).
Gookbin Cho, Eva Grinenval, Jean-Christophe P. Gabriel, Bérengère Lebental   +3 more
doaj   +1 more source

Lubrication Condition Monitoring of Practical Ball Bearings by Electrical Impedance Method

Tribology Online, 2019
In this study, the electrical impedance method was developed to monitor the thickness and breakdown ratio of oil films in elliptical elastohydrodynamic (EHD) contacts of practical ball bearings.
Taisuke Maruyama, Masayuki Maeda, Ken Nakano   +2 more
doaj   +1 more source