Results 51 to 60 of about 142 (118)

Using similarity numbers for the diagnostics of aircraft hydrogenerator

Aviation, 2014
In aviation, great emphasis is placed on aircraft safety. The current technical condition of the aircraft and its systems is an important parameter for its airworthiness.
Karol Bencalik, Karel Tretina
doaj   +1 more source

A Passive Islanding Method to Improve the Stability of Power Supply to Critical Loads in a Real Distribution Network

International Transactions on Electrical Energy Systems, Volume 2025, Issue 1, 2025.
This study proposed a modified passive islanding technique that combines over/under frequency (OUF), rate of change of frequency (ROCOF), rate of change of phase angle difference (ROCPAD), and rate of change of voltage (ROCOV) for sensing of islanding and nonislanding conditions.
Bemdoo Saka, Jacob Tsado, Vedat Kiray, Suleiman Usman Hussein, Sujin Bureerat   +4 more
wiley   +1 more source

A Novel Cooling Technique to Improve the Thermal Characteristics of a Permanent Magnet Generator Using an Earth–Air Heat Exchanger

Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.
In the current study, a novel cooling technique has been developed to enhance the thermal characteristics of a permanent magnet generator (PMG) by integrating with an earth–air heat exchanger (EAHE). The paper introduces a comprehensive thermal model of PMG, calculating thermal resistances based on the dimensions of a chosen 500‐kW PMG as a case study.
Amany R. Nasr, Ebrahim A. Badran, Ibrahim I. I. Mansy, Ayman Al-Quraan   +3 more
wiley   +1 more source

Avaliação das propriedades elétricas de barras estatóricas fabricadas com resina do tipo éter diglicidílico do bisfenol F (DGEBF) contendo nanopartículas de silica

Polímeros
Resumo O presente trabalho visa apresentar resultados da aplicação de uma resina epóxi bisfenólica (DGEBF) à base de nanopartículas de sílica (RN) e comparar suas propriedades com a resina convencional de referência epóxi bisfenólica (DGEBA) (RE ...
Rafael Novaes da Conceição, João Sinézio de Carvalho Campos   +1 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., Bonaldi, E.L., de Oliveira, L.E.L., Silva, L.E. Borges da, Salomon, C.P., Santana, W.C., Silva, J.G. Borges da, Lambert-Torres, G.   +7 more
openaire   +1 more source

Grey extra-deleting theory-based governor control for hydro-generator unit

The Journal of Engineering, 2015
The control effect by using the conventional method is not satisfied because of the grey character caused from time-variant parameters of hydro-generator units and its governor.
Ming-dong Wang, Wen-xia Su, Xian-lin Liu
doaj   +1 more source

Automatic PRPD Image Recognition of Multiple Simultaneous Partial Discharge Sources in On-Line Hydro-Generator Stator Bars

Energies, 2022
In this study, a methodology for automatic recognition of multiple simultaneous types of partial discharges (PDs) in hydro-generator stator windings was proposed.
Ramon C. F. Araújo, Rodrigo M. S. de Oliveira, Fabrício J. B. Barros   +2 more
doaj   +1 more source

Study on Current-Carrying Friction Characteristics and Corrosion Resistance of Carbon Brush/Collector Ring by Copper–Graphene Electrodeposition Process

Lubricants
The collector ring/carbon brush assembly of a hydrogenerator set is a critical component for transmitting excitation current into the self-exciting winding.
Meiyun Zhao, Jianwen Li, Chenshi Li, Yangyang Li, Xiaolong Zhang   +4 more
doaj   +1 more source

PAL-VMEA: A Novel Method for Enhancing Decision-Making Consistency in Maintenance Management

Applied Sciences, 2020
Decision-making regarding maintenance planning has become increasingly critical. In view of the need for more assertive decisions, methods, and tools based on failure analysis, performance indicators, and risk analysis have obtained great visibility. One
Marjorie M. Bellinello, Miguel A. C. Michalski, Arthur H. A. Melani, Adherbal Caminada Netto, Carlos A. Murad, Gilberto F. M. Souza   +5 more
doaj   +1 more source

Design and Research of Thrust Bearing for Datengxia Hydro-generator

Renmin Zhujiang, 2022
The design of thrust bearing of Datengxia hydro generator and the improvement measures of cooling system are introduced. The design of thrust bearing of large hydro generator focuses on the support structure, parameters and cooling method.
GE Liangcheng, FAN Xiaofu, LUO Haiqiang, WU Zhongde, LIU Pingan   +4 more
doaj