Results 31 to 40 of about 193,173 (339)

Improved Analytical Algorithm for Magnetic Field of End Windings in 300Mvar Synchronous Condenser

IEEE Access, 2021
The magnetic field of end windings affects the leakage reactance of end windings and the eddy current losses of end structures in the large electrical machine. With the rising of single-machine capacity, such effect becomes more obvious.
Erhang Zhu, Yanping Liang, Xiao Han, Xu Bian, Chenguang Wang   +4 more
doaj   +1 more source

Thermally induced mechanical stress in the stator windings of electrical machines [PDF]

, 2018
The lifetime of an electrical machine mainly depends on the thermal overloading. Modern day applications of electrical machines on one hand require compact machines with high power density, while on the other hand force electrical machines to undergo ...
Sergeant, Peter, Silwal, Bishal
core   +3 more sources

Pole-changing motor for lift installation [PDF]

E3S Web of Conferences, 2020
The Numerous lift installation require two speeds of rotation for the work. One of them is necessary for lifting, and another for exact stop of a cabin at a level of a floor. Now in these installations two speed motors with two separate windings are used.
Bobojanov Makhsud, Rismuxamedov Dauletbek, Tuychiev Furkat, Shamsutdinov Khusniddin, Magdiev Khayotullo   +4 more
doaj   +1 more source

Improved Thermal Management and Analysis for Stator End-Windings of Electrical Machines

IEEE transactions on industrial electronics (1982. Print), 2019
In an electrical machine design, thermal management plays a key role in improving the performance and reducing size. End-windings are commonly identified as the machine hot-spot.
V. Madonna, A. Walker, P. Giangrande, G. Serra, C. Gerada, M. Galea   +5 more
semanticscholar   +1 more source

Current balance method of dual windings parallel coils based on distributed capacitor compensation in high‐power WPT systems

IET Electric Power Applications, 2022
Dual windings parallel (DWP) coils are often used in high‐power wireless charging applications to reduce current stress and internal resistance. Due to the inconsistent self‐inductance and strong coupling of the two windings, the advantages of the DWP ...
Zhi Bie, Chao Wang, Kai Song, Jiantao Zhang, Chunbo Zhu   +4 more
doaj   +1 more source

Design and analysis of a novel rotor-segmented axial-field switched reluctance machine

CES Transactions on Electrical Machines and Systems, 2017
As excitation strategy is influenced by the parity of phase number, and serious end effect is caused by full pitch windings adopted by the conventional rotor-segmented switched reluctance machine (RS-SRM), a novel rotor-segmented axial-field switched ...
Wei Sun, Qiang Li, Kai Liu, Lei Li
doaj   +1 more source

Improved Method to Obtain the Online Impulse Frequency Response Signature of a Power Transformer by Multi Scale Complex CWT

IEEE Access, 2018
Online impulse frequency response analysis (IFRA) has proven to be a promising method to detect and diagnose the transformer winding mechanical faults when the transformer is in service.
Zhongyong Zhao, Chao Tang, Chenguo Yao, Qu Zhou, Lingna Xu, Yingang Gui, Syed Islam   +6 more
doaj   +1 more source

Brushless Excitation Principle and Experimental Verification of Hybrid Excitation Synchronous Generator Based on Harmonic Magnetic Field

IEEE Access, 2022
It is well known that the air-gap magnetic field of the permanent magnet synchronous generator (PMSG) is difficult to adjust. To overcome this challenge while maintaining the brushless feature of PMSGs, a hybrid excitation synchronous generator (HESG ...
Yonghong Xia, Huiyu Huang, Zhichao Zhu, Haoran Guo, Ying Chen   +4 more
doaj   +1 more source

Assessment of Electrical Machines’ State Based on Mathematical Modeling of Defect Formation in Windings

Приборы и методы измерений, 2022
The highest quality and timely diagnostics of windings’ state of various types of electrical machines including of asynchronous motors’ windings is an impoitant task. Among the existing diagnostic methods currently the most promising are those ones based
A. V. Isaev, U. V. Suchodolov, D. V. Balakhonov   +2 more
doaj   +1 more source

Influence of strands transposition on current distribution and power losses in windings of AC machines

Tehnički Glasnik, 2018
This paper analyses how the type of winding affects the current distribution and power losses in armature winding. Using finite element method, four different types of winding used in large asynchronous motors are analyzed: form-wound concentric, with ...
Branko Tomičić, Ladislav Havaš, Dunja Srpak   +2 more
doaj   +1 more source