Results 11 to 20 of about 37,428 (202)

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

A dynamic optimization method for power distribution network operation with high ratio photovoltaics

IET Generation, Transmission & Distribution, 2022
With the high ratio distributed photovoltaics (PVs) penetration to the distribution network (DN), the bearing capacity, integration capacity, consuming capacity and controlling capacity of DN for PVs are all facing great challenges.
Keyan Liu, Huiyu Zhan, Yuhan Wei, Tianyuan Kang   +3 more
doaj   +1 more source

Long-Term Blockade of Nociceptive Na_v1.7 Channels Is Analgesic in Rat Models of Knee Arthritis

Biomolecules, 2022
The voltage gated sodium channels (Nav) 1.7, 1.8, and 1.9 are primarily located on nociceptors where they are involved in signalling neuropathic pain.
Allison R. Reid, Patrice D. Côté, Jason J. McDougall   +2 more
doaj   +1 more source

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   +1 more source

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   +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

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

Determination of physicochemical conditions and role of fluids in evolution of Geysour granitoid (eastern Gonabad), using biotite mineral chemistry

Journal of Economic Geology, 2021
Introduction The chemical composition of biotite in mineralization associated with granitoids and copper porphyry deposits is sensitive to several chemical and physical factors.
Ahmad Ahmadi Khalaji , Abdolsamad Pourmohammad , Mohammad Ebrahimi , Masoud Homam, Rasoul Esmaeili   +4 more
doaj   +1 more source

Petrogenesis of the Khaku pegmatites corundum-bearing in the margin of Alvand granite complex, and its comparison with important worldwide ruby and sapphire deposits

Journal of Economic Geology, 2022
Blue-colored corundum (sapphire) is found in syenitic pegmatites in Alvand igneous complex in the Khako area. From the petrographic point of view, the host rock is composed of feldspar and small amounts of quartz, which includes corundum crystals of ...
Hadis Sadeghi, Shahryar Mahmoudi, Mohammad Reza Jafari , Mohammad Ali Arian   +3 more
doaj   +1 more source