Results 41 to 50 of about 550 (166)
The Journal of Engineering, 2019 The study of stator core vibrations generated by electromagnetic forces in electrical machines is of great practical and theoretical interest. An important part of the problem is the correct determination of mode shapes and eigen frequencies of the ...
Allan de Barros +9 more
doaj +1 more source
Variational problem for hydrogenerator thrust bearing [PDF]
, 2020 Reversible and irreversible heavy loaded thrust bearings of a hydrogenerator are investigated. The problem of oil wedge microgeometry profiling for load capacity optimization is considered.
Borovkov, A.I. +2 more
core
PRODUCTION OF STATOR WINDING OF HYDROGENERATOR USING AUTOMATED PROCESSES [PDF]
, 2019 Ovaj rad usredotočen je na izradu statorskog namota hidrogeneratora kao najvažnijeg dijela jedne hidroelektrane i dijela u kojem se stvara električna energija koju hidroelektrana proizvodi.
Šegović, Krešimir +3 more
core +1 more source
Alternative method for assessing the effectiveness of heat exchangers
Measurement: Sensors, 2021 This article discusses an automated system for monitoring the thermal effectiveness of hydrogenerator heat exchangers (water-air). The proposed calculation methodology eliminates the need to measure the outlet air temperature (the heat exchanger hot ...
Mauricio N. Frota, PhD +3 more
doaj +1 more source
Comparison of Offline VLF PD Measurements and Online PD Measurements on a 50-Year-Old Hydrogenerator Stator in Norway [PDF]
, 2018 Stator winding insulation is the part of the hydrogenerator experiencing the highest number and the most damaging failures. Partial discharge (PD) measurement, both offline and online, are commonly used for condition assessment and monitoring of ...
Aakre, Torstein Grav +7 more
core +1 more source
IEEE Access, 2020 Hydrogenerators are strategic assets for power utilities. Their reliability and availability can lead to significant benefits. For decades, monitoring and diagnosis of hydrogenerators have been at the core of maintenance strategies. A significant part of
Ryad Zemouri +5 more
doaj +1 more source
The detection and localization of stator bar with electrical breakdown of insulation [PDF]
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2018 While in operation, the generators are exposed to various electrical, thermal, mechanical and chemical stresses, but also to pollutants that shorten their lifetime.
Klasnić Ilija +2 more
doaj
Measuring Transducer for Air Gap Capacitive Sensor in Hydrogenerator
Приборы и методы измерений, 2020 One of the most important parameters of powerful hydro generators (HG) is the air gap between the rotor and the stator, and its deviation from the set norms is a defect that can lead to serious accidents.
A. S. Levytskyi +3 more
doaj +1 more source
Equipment for Predictive Maintenance in Hydrogenerators
AASRI Procedia, 2014 This paper presents an equipment for predictive maintenance in large hydrogenerators. This equipment uses techniques of digital signal processing of the information contained in the electrical variables involved in the operation of the generator. Basically, the current and voltage signals of the generator are monitored and applied the techniques of ...
Ribeiro, L.C. +7 more
openaire +1 more source
Examination of load effects of an alternating current synchronous hydraulic drive [PDF]
, 2023 Alternating current hydraulic systems can be divided into two large groups based on the electrical analogy: synchronous alternating current hydraulic drives and asynchronous alternating current hydraulic drives.
Fekete, Tamás
core +1 more source