Results 31 to 40 of about 5,196 (283)

Non-destructive evaluation of cement-based materials from pressure-stimulated electrical emission - Preliminary results [PDF]

, 2011
This is the post-print version of the final paper published in Construction and Building Materials. The published article is available from the link below.
Brown, CJ, Anastasiadis, C, Kyriazopoulos, A, Triantis, D, C. Anastasiadis, C.J. Brown, A. Kyriazopoulos, D. Triantis   +7 more
core   +1 more source

Turboset shaft voltage [PDF]

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, Joksimović Dušan, Ćirić Zoran   +2 more
doaj   +1 more source

Current-carrying friction in carbon coated ball bearing

Friction, 2023
In this work, we proposed a method for coating the whole surfaces of bearing balls uniformly by carbon film with a rotatable ball clamp. We studied the carbon/carbon friction with a self-designed current-carrying ball bearing friction test system.
Peidong Xue, Cheng Chen, Xue Fan, Dongfeng Diao   +3 more
doaj   +1 more source

Analysis of Permanent Magnet Motors in High Frequency—A Review

Applied Sciences, 2021
Electric drives consume a great amount of the world’s energy, and it will keep increasing due to the electromobility trend. Thus, the efficiency of electric drives must be improved to reach the desired sustainability goal.
Yerai Moreno, Gaizka Almandoz, Aritz Egea, Beñat Arribas, Ander Urdangarin   +4 more
doaj   +1 more source

Experiment bearing upon the question of the direction and velocity of the electric current [PDF]

American Journal of Science, 1889
n ...
Nichols, E. L., Franklin, W. S.
openaire   +2 more sources

Application of Perovskite Layer to Rotor for Enhanced Stator-Rotor Capacitance for PMSM Shaft Voltage Reduction

Energies, 2020
Adjustable speed drives use Pulse Width Modulation (PWM) to switch DC-bus voltage for the synthesis of three-phase voltages to provide power to the permanent magnet synchronous motor (PMSM).
Muhammad Aqil, Jun-Hyuk Im, Jin Hur
doaj   +1 more source

Method of Limiting Shaft Voltages in AC Electric Machines

Energies, 2021
The article presents a new method of counteracting shaft voltages and currents in AC electrical machines. It is based on the use of an auxiliary winding located in the stator of the machine.
Sebastian Berhausen, Tomasz Jarek
doaj   +1 more source

New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives

Energies, 2020
Star-connected multiphase AC drives are being considered for electromovility applications such as electromechanical actuators (EMA), where high power density and fault tolerance is demanded.
Markel Fernandez, Andres Sierra-Gonzalez, Endika Robles, Iñigo Kortabarria, Edorta Ibarra, Jose Luis Martin   +5 more
doaj   +1 more source

Identification of Bearing Currents in Electric Motors for Heavy Vehicles : Development of Methodology and Software to DetectBearing Currents

, 2023
Klimatutmaningar, lagändringar och ett ökat miljötänk har tvingat transportsektorn att ställa om till eldrift. Batterier och elmotorer har utvecklats kraftigt och är nu ett alternativ även för tunga fordon.
Lindström, Jessica
core   +1 more source

Deterioration of Mechanical Properties of Axial Compression Concrete Columns with Corroded Stirrups Coupling on Load and Chloride

Applied Sciences, 2023
To research the deterioration of the mechanical properties of stirrup-corroded concrete columns under the effect of load and chloride, accelerated corrosion and load carrying capacity tests were carried out on concrete columns subjected to long-term ...
Xiaoping Zhong, Jiahao Li, Jiahao Xu, Kailai Wang, Bingxi Zhu, Yang Liu, Keting Ni   +6 more
doaj   +1 more source