Results 21 to 30 of about 1,609,794 (313)

An Overview on Electrodynamic Bearings

IEEE Access, 2022
In electrodynamics, the levitation ensues when there is a relative motion between a stator and a conductor owing to which high eddy currents are induced.
Supreeth D. K., Siddappa I. Bekinal, Shivamurthy Rokkad Chandranna   +2 more
doaj   +1 more source

Review on Tribological and Vibration Aspects in Mechanical Bearings of Electric Vehicles: Effect of Bearing Current, Shaft Voltage, and Electric Discharge Material Spalling Current

Lubricants
Electric motors play a decisive role in electric vehicles by converting electrical energy into mechanical motion across various drivetrain components.
Rohan Lokhande, Sitesh Kumar Mishra, Deepak Ronanki, Piyush Shakya, Vimal Edachery, Lijesh Koottaparambil   +5 more
doaj   +1 more source

Simulation of the Circulating Bearing Currents for Different Stator Designs of Electric Traction Machines

Machines, 2023
Pulse–width modulated inverters are commonly used to control electrical drives, generating a common mode voltage and current with high–frequency components that excite the parasitic capacitances within electric machines, such as permanent magnet ...
Yusa Tombul, Philipp Tillmann, Jakob Andert   +2 more
doaj   +1 more source

Current Status of Hybrid Bearing Damage Detection [PDF]

Tribology Transactions, 2005
Advances in material development and processing have led to the introduction of ceramic hybrid bearings for many applications. The introduction of silicon nitride hybrid bearings into the high pressure oxidizer turbopump, on the space shuttle main engine, led NASA to solve a highly persistent and troublesome bearing problem.
PAULA J. DEMPSEY, JOSEPH M. CERTO, WILFREDO MORALES   +2 more
openaire   +1 more source

Mitigation of Electrical Discharge Damage in Electric Vehicle Bearings: Comparative Study of Multi-Walled Carbon Nanotubes and Alumina Nanoparticles in Lubricating Grease

Vehicles
The electrified environments encountered in electric vehicles (EVs) in terms of parasitic currents present significant challenges for the performance of EV bearings and their lubricants. This study investigates the effectiveness of various concentrations
Emmanuel R. Jonjo, Islam Ali, Tamer F. Megahed, Mohamed G. A. Nassef   +3 more
doaj   +1 more source

Gravitational effects on a rigid Casimir cavity [PDF]

, 2001
Vacuum fluctuations produce a force acting on a rigid Casimir cavity in a weak gravitational field. Such a force is here evaluated and is found to have opposite direction with respect to the gravitational acceleration; the order of magnitude for a multi ...
Bordag M., Bordag M., Collaboration IRGO, E. CALLONI, G. ESPOSITO, Jaekel M. T., L. DI FIORE, L. MILANO, L. ROSA   +8 more
core   +2 more sources

Why and When Are Evidence‐Based Interventions Adopted in Paediatric Supportive Care? A Qualitative Exploration of the Determinants of Photobiomodulation Implementation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Oral mucositis is a common and debilitating side effect of childhood cancer and stem cell transplant treatments. It affects the quality of life of children and young people (CYP) and places a strain on services. Photobiomodulation is recommended for oral mucositis prevention in international guidance but is poorly implemented in UK ...
Claudia Heggie, Kara A. Gray‐Burrows, Peter F. Day, Bob Phillips, Carl A. Thompson   +4 more
wiley   +1 more source

Clinical Insights Into Hypercalcemia of Malignancy in Childhood

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Hypercalcemia of malignancy (HCM) is a rare but life‐threatening metabolic emergency in children that occurs in less than 1% of pediatric cancer cases, with a reported incidence ranging from 0.4% to 1.0% across different studies. While it is observed in 10%–20% of adult malignancies, pediatric HCM remains relatively uncommon.
Hüseyin Anıl Korkmaz
wiley   +1 more source

Research on Analysis and Suppression Methods of the Bearing Current for Electric Vehicle Motor Driven by SiC Inverter

Energies
The silicon carbide (SiC) inverter brings great advantages to the motor drive systems of new energy vehicles; however, severe challenges to the bearings also happen.
Mingliang Yang, Yuan Cheng, Bochao Du, Yukuan Li, Sibo Wang, Shumei Cui   +5 more
doaj   +1 more source

A Current Noise Cancellation Method Based on Fractional Linear Prediction for Bearing Fault Detection

Sensors, 2023
The stator current in an induction motor contains a large amount of information, which is unrelated to bearing faults. This information is considered as the noise component for the detection of bearing faults.
Kaijin Xu, Xiangjin Song
doaj   +1 more source