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Wyszukujesz frazę "squirrel cage induction motor" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
Stator winding inter-turn short-circuit modelling of a squirrel-cage induction motor
Autorzy:
Radecki, A.
Powiązania:
https://bibliotekanauki.pl/articles/1193158.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
squirrel-cage induction motor modelling
induction motor faults
stator winding inter turn short-circuit
Opis:
A mathematical model of a squirrel-cage induction motor with inter-turn short-circuits in stator phases is presented in this paper. In the proposed mathematical model an extent and angular localization of short-circuit faults are determined using a simple form of short-circuit coefficient matrices. The model does not require any additional motor parameters than those that are required for conventional model of healthy induction motor. Comparative results obtained through computer simulations and from a laboratory test-stand with 2.2 kW induction motor are contained in the article. The results obtained validate the proposed extended mathematical model of a squirrel-cage induction motor with inter-turn short-circuit of stator windings.
Źródło:
Power Electronics and Drives; 2016, 1, 36/1; 139-148
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unraveling Induction Motor State through Thermal Imaging and Edge Processing : A Step towards Explainable Fault Diagnosis
Autorzy:
Piechocki, Mateusz
Pajchrowski, Tomasz
Kraft, Marek
Wolkiewicz, Marcin
Ewert, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/27312790.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
thermal imaging
fault diagnosis
squirrel-cage induction motor
convolutional neural networks
explainability
edge processing
Opis:
Equipment condition monitoring is essential to maintain the reliability of the electromechanical systems. Recently topics related to fault diagnosis have attracted significant interest, rapidly evolving this research area. This study presents a non-invasive method for online state classification of a squirrel-cage induction motor. The solution utilizes thermal imaging for non-contact analysis of thermal changes in machinery. Moreover, used convolutional neural networks (CNNs) streamline extracting relevant features from data and malfunction distinction without defining strict rules. A wide range of neural networks was evaluated to explore the possibilities of the proposed approach and their outputs were verified using model interpretability methods. Besides, the top-performing architectures were optimized and deployed on resource-constrained hardware to examine the system's performance in operating conditions. Overall, the completed tests have confirmed that the proposed approach is feasible, provides accurate results, and successfully operates even when deployed on edge devices.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 3; art. no. 170114
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soft starting and braking application for squirrel-cage induction motors operating in intermittent duty
Autorzy:
Firago, B.
Vasilyev, D.
Powiązania:
https://bibliotekanauki.pl/articles/1813599.pdf
Data publikacji:
2012
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
soft starting and braking
squirrel-cage induction motor
energy losses
stator winding temperature
frequency of starting
Opis:
This paper deals with energetic aspects of soft starting and braking application for the squirrelcage induction motors operating in intermittent duty with constant load. Energy losses in transients of an induction motor for different laws of voltage changing as well as induction motor stator winding temperature at the end of starting process are calculated and compared with the ones during fullvoltage starting and plug braking. Energy losses calculation during induction motor soft starting and braking has been performed analytically and via the Matlab simulation models of equivalent twophase induction motor in alfa to beta coordinates. The results of both calculation methods are compared and a divergence between them is determined. Also the effect of total energy losses on the induction motor stator winding temperature at the end of the motor starting process and its allowable frequency of starting is analyzed. Analytical calculation and simulation of soft starting and braking have been performed with allow for the linear and exponential laws of the first voltage harmonic magnitude changing. The results of simulation and analytical calculations are given in the tables.
Źródło:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2012, 66, 32; 339-349
1733-0718
Pojawia się w:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of super-twisting sliding mode controllers in direct field-oriented control system of six-phase induction motor: experimental studies
Autorzy:
Listwan, J.
Powiązania:
https://bibliotekanauki.pl/articles/1193593.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
six-phase squirrel-cage induction motor
direct field-oriented control method
super-twisting sliding mode control
experimental studies
Opis:
This paper presents the direct field-oriented control (DFOC) method of six-phase induction motor with the application of super-twisting sliding mode algorithm. The mathematical model of the six-phase induction motor has been described. The descriptions of the space vector modulation (SVM) method and the super-twisting algorithm have been presented. The DFOC method with super-twisting sliding mode controllers has been described. The experimental studies of the DFOC method with super-twisting controllers have been performed, and the results of these studies are presented and discussed.
Źródło:
Power Electronics and Drives; 2018, 3, 38; 23-34
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computerised system for fault diagnosis of the rotor bars of squirrel-cage induction motor
Komputerowy system diagnostyczny uszkodzeń prętów klatki maszyny indukcyjnej
Autorzy:
Osowski, S.
Kurek, J.
Siwek, K.
Powiązania:
https://bibliotekanauki.pl/articles/257946.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
klatkowa maszyna indukcyjna
wykrywanie uszkodzeń
pręt
maszyna wektorów nośnych
przetwarzanie sygnału
squirrel-cage induction motor
bar fault detection
support vector machine (SVM)
signal processing
Opis:
The paper presents the computerised system for the diagnosis of the rotor bars of an induction electrical motor. The solution relies on the processing of the measured stator current and application of the Support Vector Machine as the classifier. The important point is the generation of the diagnostic features on the basis of which the SVM classifier undertakes its decision whether or not the bars are faulty. The most important problem is concerned with the generation of the diagnostic features, on the basis of which the recognition of the state of the rotor bars is done. In our approach, we use the spectral information of the stator current, limited to a strictly specified region. The selected features form the input vector applied to the single class Support Vector Machine, responsible for recognition of the fault. The results of the numerical experiments are presented and discussed in the paper.
Praca przedstawia skomputeryzowany automatyczny system diagnostyczny do wykrywania uszkodzeń prętów maszyny indukcyjnej. Rozwiązanie jest typu bezinwazyjnego i może być zastosowane do maszyny w ruchu. Sygnały diagnostyczne generowane są na podstawie zarejestrowanych sygnałów prądu statora. W aplikacji wykorzystano jednoklasową sieć SVM (ang. Support Vector Machine) pracującą jako klasyfikator. Jednym z najistotniejszych problemów rozwiązanych w tym zadaniu jest generacja i selekcja odpowiednich cech diagnostycznych, na podstawie których klasyfikator dokonuje rozpoznania stanu prętów. Zaproponowano cechy bazujące na charakterystyce spektralnej prądu statora, ograniczonej do wybranego zakresu częstotliwości związanego z poślizgiem maszyny. System zbudowany w ramach projektu jest w pełni zautomatyzowany, poczynając od akwizycji sygnałów, poprzez ich przetwarzanie wstępne, aż po końcowy werdykt (pręty uszkodzone bądź nieuszkodzone).
Źródło:
Problemy Eksploatacji; 2010, 4; 135-151
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of closed loop control on diagnostic indices in different faults of squirrel cage induction motor
Autorzy:
Bouabid, Nourelhouda
Moussa, Mohamed-Amine
Maouche, Yassine
Khezzar, Abdelmalek
Powiązania:
https://bibliotekanauki.pl/articles/1955204.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
closed loop control
discrete Fourier transformation
fault diagnostic
indirect filed control
rotor mechanical faults
squirrel cage induction motor
sterowanie w pętli zamkniętej
dyskretna transformacja Fouriera
diagnostyka błędów
sterowanie pośrednie złożone
usterki mechaniczne wirnika
silnik indukcyjny klatkowy
Opis:
The aim of this work is to study the influence of closed loop control on diagnostic indices of both broken bar and mixed air-gap eccentricity fault indices of the squirrel cage induction motor drive. The present work is focused on the direct stator current isd signal analysis, which is independent of torque load when the induction motor is controlled by an indirect control field. The fault signatures are on the line extracted from the direct stator current signal using the discrete Fourier transformation (DFT). The formula of the measured direct stator current at both conditions is determined by the transfer function of the current loop. The obtained results show that the current loop corresponds to a low pass filter and can reduce the magnitude of diagnostic indicators which lead to wrong evaluation of the fault. Simulation and experiments were carried out in order to confirm the theoretical analysis.
Źródło:
Archives of Electrical Engineering; 2021, 70, 4; 943-958
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problems of practical diagnostics of induction machines in industry
Autorzy:
Dybowski, P.
Rams, W.
Rusek, J.
Powiązania:
https://bibliotekanauki.pl/articles/1203942.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
current measurement
diagnostic expert system
induction machine
squirrel-cage motor
Opis:
There are many problems in practical diagnostics of high-power, squirrel-cage induction machines, operated in industrial conditions. These problems make the diagnostics a difficult matter. The problems appear already at the stage of gathering diagnostic signals. The only practically accessible signals are the currents on secondary sides of current transformers monitoring supply currents of separate machines. Due to the proximity of other conductors, carrying high currents, these signals are sometimes accompanied by heavy background noise. The next stage of the diagnostic procedure is off-line analysis of registered signals referring to investigated objects. The main problem at this stage is proper interpretation of gotten results, especially in the cases where determination of the cage state, of investigated machines, is difficult due to ambiguity of diagnostic signals. The ambiguities and doubts by taking diagnostic decision result from that the diagnostic-like signal could be generated not only by cage damage but also by slightly asymmetrically manufactured rotor cage. In such difficult cases, the many-year diagnosing experience is the indispensable precondition for proper diagnostic verdict. The present paper includes some reports on case studies encountered during practical diagnoses of high power, 6kV induction machines, operated in real industrial conditions.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2008, 14, 1; 79-84
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Squirrel cage induction motors with idle bars
Autorzy:
Bernatt, J.
Powiązania:
https://bibliotekanauki.pl/articles/141386.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silnik indukcyjny
klatka wirnika
pręt bierny
induction motor
squirrel cage
idle bar
hard working conditions
Opis:
The paper describes high output induction motors driving large applications of heavy starting conditions. Heavy start is characterised by long accelerating time and occures in drives of hudge inertia torque, esspecially when performed at full load. The reliable operation of the motors depends on proper design and quality of rotor's cage. The aspects of thermal behaviour and electrodynamic forces have to be considered during the design of the motor for hard working conditions. In the paper the rotor with idle bars is investigated.
Źródło:
Archives of Electrical Engineering; 2010, 59, 1-2; 79-86
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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