Results 61 to 70 of about 5,196 (283)

Tribo-Electric Performance of Nano-Enhanced Palm Oil-Based Glycerol Grease for Electric Vehicle Bearings

Lubricants
Rolling Bearings are crucial components for induction motors and generators in electric vehicles (EVs), as their performance considerably influences the system’s operational reliability and safety.
Amany A. Abozeid, May M. Youssef, Tamer F. Megahed, Mostafa El-Helaly, Florian Pape, Mohamed G. A. Nassef   +5 more
doaj   +1 more source

Reduction of non-circulating bearing currents by electrical machine design [PDF]

, 2023
Electrical machines and drive systems play a crucial role in industrial processes and everyday life. Electrical drive systems that are capable of operating in the variable speed mode allow applying electric motors for the widest range of tasks. Nowadays,
Vostrov, Konstantin
core  

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Design and Validation of Segmented CFRP Lamella-Based Composite End Shield for Bearing Current Mitigation

Machines
This study addresses the premature failure of electric motor bearings caused by inverter-induced parasitic currents. We propose a novel segmented end shield design utilizing 24 carbon fiber-reinforced polymer (CFRP) lamellae to provide both structural ...
Jiří Sika, Michal Křížek, Tomáš Kavalír, Bohumil Skala   +3 more
doaj   +1 more source

Modeling of Bearing Voltage in Electric Machines Based on Electromagnetic FEA and Measured Bearing Capacitance

, 2021
Bearing voltages and associated bearing currents in electric machines driven by pulsewidth modulation converters with high switching frequencies and high dv/dt can cause premature bearing failures.
Heins, Greg, Han, Peng, Patterson, Dean, Theile, Mark, Ionel, Dan M.   +4 more
core   +1 more source

Influence of Surface Finish on the Tribological Performance of AlTiBN Coatings Deposited on Forming Tools

Advanced Engineering Materials, EarlyView.
Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver, Iker Alfonso, Eneko Barba, Javier León, José Antonio García, Iñaki Zalakain, Iván Fernández Martínez, Arley García‐Carrero, Christian Almeyda, Daniel Salcedo   +9 more
wiley   +1 more source

WLI, XPS and SEM/FIB/EDS Surface Characterization of an Electrically Fluted Bearing Raceway

Lubricants
Electrical bearing currents may disturb the performance of the bearings via electro-corrosion if they surpass a limit of ca. 0.1 to 0.3 A/mm2. A continuous current flow, or, after a longer time span, an alternating current or a repeating impulse-like ...
Omid Safdarzadeh, Alireza Farahi, Andreas Binder, Hikmet Sezen, Jan Philipp Hofmann   +4 more
doaj   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Tribological characterization of a ball bearing subjected to an electric field : Electric drivetrain tribology

, 2023
Electric machines are widely used in for instance the automotive industry in electric vehicles and in wind turbines. The electrical machines have mechanical bearings as an integral part used to transmit power and load.
Farooq, Muhammad Umar
core   +1 more source

On the Modeling of Bearing Voltage and Current in PWM Converter-fed Electric Machines Using Electromagnetic Finite Element Analysis

, 2021
Bearing voltages and resulting currents in electric machines driven by PWM converters with fast switching and high dv/dt can cause premature bearing failures.
Peng Han, Zhang, Yibin, Mark Thiele, Murat G. Kesgin, Thiele, Mark, Han, Peng, Kesgin, Murat G., Greg Heins, Heins, Greg, Patterson, Dean, Ionel, Dan M., Dean Patterson, Dan M. Ionel, Yibin Zhang   +13 more
core   +1 more source