Results 41 to 50 of about 437 (152)

Effects of Shifted Magnetic Poles and Skewed Stator Slots on the Synchronous Reactance, Damper Bar Loss, and No‐Load Waveforms of Tubular Hydrogenerators

Electronics Letters, Volume 62, Issue 1, January/December 2026.
With a large‐scale 34‐MW integer‐slot tubular hydrogenerator as an example, static and transient field models are established and solved in this paper to reveal the influence laws of two key geometric structures, skewed stator slots and shifted poles, on synchronous reactance, damper bar losses, and no‐load voltage waveforms.
Wen‐han Li, Zhi‐ting Zhou, Chuan Liao, Bin Chen, Zhen‐nan Fan   +4 more
wiley   +1 more source

Modeling of the Stress–Strain of the Suspensions of the Stators of High-Power Turbogenerators

Computation, 2022
In the submitted scientific work, the existing types of stator fastening design of turbogenerators and the main causes of the stressed state of the stator suspensions are considered.
Oleksii Tretiak, Dmitriy Kritskiy, Igor Kobzar, Victoria Sokolova, Mariia Arefieva, Iryna Tretiak, Hromenko Denys, Viacheslav Nazarenko   +7 more
doaj   +1 more source

Comparative Assessment of Lightning Overvoltages at Transformer and Hydrogenerator Terminals Under Nonideal Station‐Side Metal‐Oxide Arrester Conditions

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This study comparatively assesses lightning‐overvoltage propagation to the transformer high‐voltage terminal and hydrogenerator busbar of a hydropower plant under prescribed lightning‐current injection and selected nonideal conditions of a station‐side metal‐oxide arrester.
Jiachen Zhang, Bo Zhang, Wang Guo, Chenen Sun, Zeyu Zhao, Yuanyang Liu, Jichun Yi, Wei Li, Yanliang Qiu, Guanjun Zhang   +9 more
wiley   +1 more source

Dynamic Electromagnetic Force of Stator Core for Hydro-generators under Phase to Phase Short Circuit with Two Fault Points Close to the Neutral Point

Journal of Harbin University of Science and Technology, 2021
Aiming at the problem that the phase to phase short-circuit with two fault points close to the neutral point may cause dead region of protection schemes of large synchronous generators, and in order to prevent the further expansion of the fault from ...
XIAO Shi-yong, WANG Yun-yang, GE Bao-jun
doaj   +1 more source

Analysis and calculation of electromagnetic force of stator winding and damping bar during dynamic loading of pumped storage generator/motor

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
By studying the electromagnetic force law of the stator tooth wall and the key points of the stator tooth tip under different loadings, the key parts of the stator tooth wall subjected to the electromagnetic force shock are found out. What's more, the force change law of the damping strip is obtained through analysing the force of the damping tooth ...
Dajun Tao, Xu Dai, Baojun Ge, Guifen Li, Gang Hu   +4 more
wiley   +1 more source

Friction and Lubrication of Large Tilting-Pad Thrust Bearings

Lubricants, 2015
Fluid film bearings have been extensively used in the industry because of their unbeatable durability and extremely low friction coefficient, despite a very low coefficient of friction dissipation of energy being noticeable, especially in large bearings.
Michał Wasilczuk
doaj   +1 more source

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. In this respect, the usage of diagnostics without disassembly is considered an advantage.
Bencalik, Karol, Tretina, Karel
openaire   +3 more sources

Influence of the Electromagnetic Field Model on the Calculated No‐Load Magnetic Field of Tubular Hydro Generators

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
This study investigated the influence of the selected electromagnetic field model on the calculation of the no‐load magnetic field of a tubular hydro generator. Straight and skewed stator slots were considered for the structure of the hydro generator. Three models were considered: the transient motion electromagnetic field‐circuit coupling model, the ...
Qi‐Rui Yin, Zhi‐Ting Zhou, Zhen‐Nan Fan, Yong Yang, Jing‐Can Li   +4 more
wiley   +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