Results 31 to 40 of about 43,115 (288)

Early fault diagnosis of transformer winding based on leakage magnetic field and DSAN learning method

Frontiers in Energy Research, 2023
Aiming at the problem of lack of training samples and low accuracy in transformer early winding fault diagnosis, this paper proposes a transformer early faults diagnosis method based on transfer learning and leakage magnetic field characteristic quantity.
Xiangli Deng, Zhan Zhang, Hongye Zhu, Kang Yan   +3 more
doaj   +1 more source

3‐D magnetic equivalent circuit model for a coreless axial flux permanent‐magnet synchronous generator

IET Electric Power Applications, 2021
In coreless axial flux permanent magnet synchronous generators (AFPMSGs), magnetic leakage and fringing effect is significant due to the large air gap and increases the difficulty in magnetic field calculation.
Yunpeng Zhang, Yiming Wang, Shuning Gao
doaj   +1 more source

Photospheric magnetic vortex structures [PDF]

, 2011
Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere.
Shelyag, S., Keenan, Francis, F. P. Keenan, Fedun, V., Mathioudakis, Mihalis, Mathioudakis, M., M. Mathioudakis, Shelyag, Sergiy, Erdélyi, Robert, Keenan, F. P., Erdelyi, R., R. Erdélyi, S. Shelyag, V. Fedun, Fedun, Viktor   +14 more
core   +1 more source

Enhancing Wire-Rope Damage Signals Based on a Radial Magnetic Concentrator Bridge Circuit

Sensors, 2022
Hall-effect sensors are used for the non-destructive testing of wire ropes owing to their low power consumption and high operation frequency. The high-speed operation of wire ropes causes vibration inclination at different frequencies, which makes it ...
Jie Tian, Wei Wang, Hongyao Wang, Qiang Bai, Zeyang Zhou, Pengbo Li   +5 more
doaj   +1 more source

Power Transformer Based on Field-circuit Coupling in Different Operating Modes Simulation Ｒesearch on Leakage Magnetic Field

Journal of Harbin University of Science and Technology, 2021
In view of the change in the operation mode of the transformer，under the impact of the short-circuit current of the transformer，the magnetic field distribution characteristics of the windings are different.
WANG Kang, ZENG Jing-lan, ZHENG Yu, LAN Sheng, DU Guo-an, LIN Ye   +5 more
doaj   +1 more source

Electromagnetic optimization design and leakage magnetic field calculation of shell transformer [PDF]

AIP Advances
Aiming at the problems of high loss and local overheating caused by concentrated leakage magnetic fields in the traditional design of shell transformers, this paper carries out electromagnetic optimization design and leakage magnetic field calculation ...
Duanjiao Li, Wenxing Sun, Pengjie Liang, Yuhui Chen, Dezhi Chen, Xianghui Chang   +5 more
doaj   +1 more source

Photospheric high-frequency acoustic power excess in sunspot umbra: signature of magneto-acoustic modes [PDF]

, 2013
We present observational evidence for the presence of MHD (magnetohydrodynamic) waves in the solar photosphere deduced from SOHO/MDI (Solar and Heliospheric Observatory/Michelson Doppler Imager) Dopplergram velocity observations.
Shelyag, S., Thompson, Michael John, Zharkov, Sergei, Zharkov, S., M. J. Thompson, Fedun, V., S. Zharkov, Shelyag, Sergiy, Erdélyi, Robert, R. Erdélyi, Erdelyi, R., S. Shelyag, V. Fedun, Fedun, Viktor, Thompson, M.J.   +14 more
core   +1 more source

A Magnetic Flux Leakage and Magnetostrictive Guided Wave Hybrid Transducer for Detecting Bridge Cables

Sensors, 2012
Condition assessment of cables has gained considerable attention for the bridge safety. A magnetic flux leakage and magnetostrictive guided wave hybrid transducer is provided to inspect bridge cables.
Jiang Xu, Xinjun Wu, Cheng Cheng, Anran Ben   +3 more
doaj   +1 more source

Simulation and Analysis of 3 D Transient Leakage Magnetic Field and Electromotive Force of Power Transformer

Journal of Harbin University of Science and Technology, 2021
In order to analyze the transient magnetic field and transient electrodynamic characteristics of transformer windings under shorL-circuit impact, according to the Lheo1-y of leakage magnetic field of transformer windings and the principle of calculation ...
MU Long, CHEN Bo-gen, CAI Feng, WU Li-ming, DU Guo-an, lAN Sheng   +5 more
doaj   +1 more source

Leakage magnetic field of BLDCM based on Comsol multiphysics [PDF]

AIP Conference Proceedings, 2017
The measurement of geomagnetic field conducted by underwater robot is widely used during cruise, however, it is often influenced by the strong electromagnetic interference of the other large-scale electronic equipment on the robot itself. The leakage magnetic field of high-power brushless DC motor (BLDCM) has been identified as one of the main ...
Xiaojun Zhang, Jiabao Wen, Wen Wang, Jinghua Sun   +3 more
openaire   +1 more source