Results 51 to 60 of about 205,989 (300)

Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors

Energies, 2020
This paper presents a method to reduce the winding-to-rotor capacitance of electrical machines for the purpose of suppressing shaft-to-frame voltage, which causes reliability issues, such as electromagnetic interference (EMI) and bearing current.
Manje Yea, Ki Jin Han
doaj   +1 more source

Resonant DC link inverters for AC motor drive systems – critical evaluation [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences, 2019
In this survey paper, resonant and quasiresonant dc link inverters are reexamined for ac motor drive applications. Critical evaluation of representative topologies is based on simulation and waveform analysis to characterize current/voltage stress of ...
M. Turzyński, P.J. Chrzan
doaj   +1 more source

The Influence of Load and Speed on the Initial Breakdown of Rolling Bearings Exposed to Electrical Currents

Lubricants, 2023
The reason for the failure of electric vehicle drives is increasingly current-induced damage to rolling bearings. Studies show that rolling bearings are more susceptible to current pass-through after the first occurrence of unwanted bearing currents.
Steffen Puchtler, Robert Maier, Martin Kuhn, Yves Burkhardt   +3 more
doaj   +1 more source

Refurbishment of the cryogenic coolers for the Skylab earth resources experiment package [PDF]

, 1975
Skylab Earth Resources Experiment Package (EREP) experiments, S191 and S192, required a cold temperature reference for operation of a spectrometer. This cold temperature reference was provided by a subminiature Stirling cycle cooler. However, the failure
Luksa, N. C., Smithson, J. C.
core   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Common-Mode Choke Design to Eliminate Electrostatic Discharge Machining Bearing Currents in Wide-Bandgap Inverter-Fed Motor Drives

Energies
The electrification of mobility sectors, including automotive, aerospace, and robotics, has accelerated the need for compact and high-efficiency power converters in electric motor drives. Wide-bandgap (WBG) semiconductor–based inverters offer significant
Mustafa Memon, Mohamed Diab
doaj   +1 more source

A Novel Bearing Lubricating Device Based on the Piezoelectric Micro-Jet

Applied Sciences, 2016
A novel bearing lubricating device, which is embedded in gyroscope’s bearing system and based on the theory of the piezoelectric micro-jet, was designed for this study.
Kai Li, Junkao Liu, Weishan Chen, Lei Ye, Lu Zhang   +4 more
doaj   +1 more source

High speed low level electrical stepping switch Patent [PDF]

, 1963
High speed low level voltage commutating ...
Dimeff, J.
core   +1 more source

Environmental stimuli shape microglial plasticity in glioma [PDF]

, 2017
In glioma, microglia and infiltrating macrophages are exposed to factors that force them to produce cytokines and chemokines, contributing to tumor growth and maintaining a pro-tumorigenic, immunosuppressed microenvironment.
Alboni, Armaiz-Pena, Bisht, Branchi, Butovsky, Cao, Chabry, Coniglio, Coughlin, Duluc, Dunn, Ehninger, Ehninger, Gabrusiewicz, Garofalo, Goldszmid, Graeber, Guillerey, Hambardzumyan, Haynes, Jung, Kaplan, Kmiecik, Kmiecik, Koka, Lauro, Mantovani, Markovic, Markovic, Mathios, Mieczkowski, Morrison, Murray, Nachat-Kappes, Nguyen, Ohsawa, Pagani, Parker, Pyonteck, Quail, Rattazzi, Richter, Rodríguez, Sale, Schmittgen, Sica, Sierra, Song, Stabile, Strengell, Szulzewsky, Szulzewsky, Tremblay, Tremblay, Van Rooijen, Vivier, Waldmann, Westwood, Yu, Zhu   +59 more
core   +2 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source