Results 21 to 30 of about 12,916,031 (272)
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2016 The paper presents an analyses of shaft voltage and bearing current phenomena in electrical machines. An overview of the causes of these voltages and currents and their possible consequences is also given. The influence of the thyristor excitation system
Klasnić Ilija +2 more
doaj +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 +3 more
doaj +1 more source
Design and Unbiased Control of Nine-Pole Radial Magnetic Bearing
Actuators, 2023 Typical radial active magnetic bearings are structurally symmetric. For example, an eight-pole bearing uses two opposing pairs to control one axis by winding the pair in series.
Myounggyu D. Noh, Wonjin Jeong
doaj +1 more source
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 +3 more
doaj +1 more source
Energies, 2022 Pulse-width modulation (PWM) inverter drive systems are widely applied in industry for their great speed-control characteristics and performance. However, the common-mode voltage of the inverter induces motor bearing voltage and bearing current, which ...
Lei Yang +5 more
doaj +1 more source
Energies, 2019 Wind energy integration in power grids is increasing day by day to reduce the use of fossil fuels, and consequently greenhouse gas emissions. Using the pulse-width modulated (PWM) power converters in wind turbine generators, specifically in doubly-fed ...
Amr. S. Zalhaf +2 more
doaj +1 more source
Electrical Bearing Damage, A Problem in the Nano- and Macro-Range
Lubricants, 2022 Rolling bearings face different damaging effects: Besides mechanical effects, current-induced bearing damage occurs in electrical drive systems. Therefore, it is of increasing interest to understand the differences leading to known electrical damage ...
Volker Schneider +9 more
doaj +1 more source
Time-frequency vibration analysis for the detection of motor damages caused by bearing currents [PDF]
, 2015 International audienceMotor failure due to bearing currents is an issue that has drawn an increasing industrial interest over recent years. Bearing currents usually appear in motors operated by variable frequency drives (VFD); these drives may lead to ...
Razik, Hubert +3 more
core +2 more sources
Overview of Bearing White Etching Cracks due to Electrical Currents
, 2021 International audienceWith the development of variable speed drives, motor bearings are submitted to additional stress due to parasitic currents which deteriorate bearing raceways, rolling elements and lubricant.
Boileau, Thierry +3 more
core +1 more source
e+i Elektrotechnik und InformationstechnikThis paper presents and validates a novel method for measuring bearing currents in an electric drive system. As with any current measurement, a defined path must first be established through which the bearing currents flow.
B. Knebusch +3 more
semanticscholar +1 more source