Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Jan Sobra"'
Publikováno v:
IEEE Access, Vol 10, Pp 81910-81925 (2022)
This article presents an intelligent and accurate framework for fault diagnosis of induction motors using light gradient boosting machine (LightGBM). The proposed framework offers promising generalization ability when the testing data contains new un
Externí odkaz:
https://doaj.org/article/25bbe80d6a5541c5ae0b1402cb2a27b6
Autor:
Md Masum Billah, Floran Martin, Anouar Belahcen, Aswin Balasubramanian, Toomas Vaimann, Jan Sobra
In this article, a forward uncertainty propagation method is presented for a 2-D finite-element (FE) model in an induction machine. This method is applied to quantify the uncertainty of input parameters, for example, dimensions and material propertie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6974e5503f6202baf0789a1de381b2ce
https://aaltodoc.aalto.fi/handle/123456789/116880
https://aaltodoc.aalto.fi/handle/123456789/116880
his article presents an intelligent and accurate framework for fault diagnosis of induction motors using light gradient boosting machine (LightGBM). The proposed framework offers promising generalization ability when the testing data contains new uns
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2821e1e7e746415d0e261ba24f9d99f8
https://aaltodoc.aalto.fi/handle/123456789/116182
https://aaltodoc.aalto.fi/handle/123456789/116182
Publikováno v:
2020 19th International Conference on Mechatronics - Mechatronika (ME).
The paper deals with magnetic forces and vibration analysis of a nine-phase induction motor. It is described a method of voltage harmonics injection for reaching either the same amplitude or RMS value of supplying voltage as for the case of supplying
Publikováno v:
2020 International Conference on Electrical Machines (ICEM).
In the paper, electromagnetic and vibration analyses of traction electric machine exhibiting static and dynamic eccentricities is performed. The machine is a highspeed permanent magnet synchronous motor with surface-mounted permanent magnets and doub
Autor:
Sarvavignoban Sandirasegaram, Toomas Vaimann, Jan Sobra, Alireza Nemat Saberi, Anouar Belahcen
This paper presents a fault diagnosis scheme for induction machines (IMs) using Support Vector Machine (SVM) and Random Forests (RFs). First, a number of time domain and frequency-domain features are extracted from vibration and current signals in di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7253e4e822eee16b215e46198b774c9c
https://aaltodoc.aalto.fi/handle/123456789/101411
https://aaltodoc.aalto.fi/handle/123456789/101411
Autor:
Miroslav Byrtus, Jan Sobra
Publikováno v:
IECON
In the paper, authors deal with the case study of an impact of stator frame and vertical mounting on modal and vibration behavior of a squirrel-cage induction machine. The study is performed using finite element analysis where resulting magnetic forc
This study presents induction machine fault detection possibilities using smartphone recorded audible noise. Acoustic and audible noise analysis for fault detection is a well-established technique; however, specialised equipment for diagnostic purpos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3057c9a21936a5260d1e9b939d0cfec7
https://aaltodoc.aalto.fi/handle/123456789/33120
https://aaltodoc.aalto.fi/handle/123456789/33120
Publikováno v:
2018 ELEKTRO.
The autotransformer which is supplied by network without neutral wire must be loaded symmetrically. Already small unsymmetrical load causes significant voltage imbalance and overvoltage. When the fully loading of one phase is required, the zigzag aut
Publikováno v:
2017 IEEE Conference on Energy Conversion (CENCON).
The subject of this paper is evaluating and comparing of the measured mechanical losses with equation for mechanical losses calculation. The electric machines have numerous sources of losses which are converted into the heat. These losses heat up the