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    Wyświetlanie 1-6 z 6
    Tytuł:
    Comparison of numerically determined noise of a 290 kW induction motor using FEM and measured acoustic radiation
    Autorzy:
    Nahlaoui, M. Al
    Steins, H.
    Kulig, S.
    Exnowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/140646.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    inverter-fed
    induction motor
    asynchronous machine
    acoustic radiation
    modal analysis
    Opis:
    In this paper a comparison of numerically determined and measured electromagnetically exited noise of an induction motor is presented. The calculations are accomplished using FEM for an example motor, which is a 290 kW inverter-fed asynchronous machine. The approach starts with the electromagnetic and mechanical consideration. The focus is set on acoustic considerations, which contain the 3D-FE-model and measurement setup in the sound chamber.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 2; 195-207
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of faults in the asynchronous machine by the use of smartmaterials
    Autorzy:
    Regaz, A.
    Zegnini, B.
    Mahi, D.
    Boukezzi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/329694.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    piezoelectric
    magnetostrictive
    diagnosis
    asynchronous machine
    piezoelektryk
    maszyna asynchroniczna
    magnetostrykcja
    diagnostyka
    Opis:
    This paper aimed with diagnosis of defects in asynchronous machine. The used method is based on the exploitation of the behavioural laws of magnetostrictive and piezoelectric materials, under harmonic regime, used in the construction of the asynchronous machine. Piezoelectric sensors are used both in the stator and in the rotor. The used one in the stator serves to detect the rupture at the stator windings and the one used in the rotor helps us to detect the rupture of the rotor bars. The produced electric potential in the terminals of piezoelectric sensor is due to the deformation generated by magnetic induction under the effect of magnetostriction. A finite element method (FEM) is selected to be the resolution numerical method. This method is used for modelling the asynchronous machine under anomaly conditions and non-load.
    Źródło:
    Diagnostyka; 2018, 19, 3; 43-54
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency improvement due to direct torque and flux three levels three areas control method applied to small hydroelectric power plant
    Autorzy:
    Kulikowski, K.
    Sikorski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200033.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    asynchronous machine
    AC/DC/AC converter
    DC/AC converter
    DTC
    flux control
    Opis:
    The paper presents a description of a new DTFC3L3A (direct torque and flux control three levels three areas) control method of induction machine as well as its comparison with the DTC method. The basis for the comparison is the switching frequency of described methods. The proposed method is optimized to reduce number of switchings (which is proportional to switching power losses) in static state, as well as it takes into account the angle which makes it possible to obtain a sinusoidal shape of flux within range of low angular frequencies of an asynchronous machine. The paper includes the results of experiments performed on a three level DC/AC inverter for both control methods.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 569-574
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of numerically determined noise of a 290 kW induction motor using fem and measured acoustic radiation
    Autorzy:
    Al Nahlaoui, M.
    Steins, H.
    Kulig, S.
    Exnowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813585.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    inverter-fed
    induction motor
    asynchronous machine
    acoustic radiation
    FEM
    noise
    surface vibration
    modal analysis
    Opis:
    Abstract - In this paper a comparison of numerically determined and measured electromagnetically exited noise of an induction motor is presented. The calculations are accomplished using FEM for an example motor, which is a 290 kW inverter-fed asynchronous machine. The approach starts with the electromagnetic and mechanical consideration. The focus is set on acoustic considerations, which contain the 3D-FE-model and measurement setup in the sound chamber. The determination of the induction and force waves is presented using parts of the results. In the case of the mechanical modeling the three dimensional FE-model is shown.
    Źródło:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2012, 66, 32; 333-338
    1733-0718
    Pojawia się w:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter
    Autorzy:
    Sikorski, A.
    Kulikowski, K.
    Korzeniewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/201199.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    asynchronous machine
    DC/AC inverter
    DTC
    flux and torque control
    3-level DC/AC inverter
    Opis:
    This paper describes two modern direct torque and flux control methods of an induction machine supplied by a three-level inverter. Additionally, it presents a comparison of the methods both in static and dynamic states. The methods, in a specific way, make use of an increased number of active vectors of the three-level inverter in order to improve control quality and reduce switching frequency. The two methods modify the DTC method by using its advantages and eliminating, at the same time its drawbacks. In static states the comparison was based on the results of investigations performed for two different load values and three set values of angular speed, whereas in dynamic states the comparison was focused on the behavior of the machine at startup. The results of the investigations have shown that both methods give very good performance. They are characterized by both sinusoidal shape of flux and low current deformations even at low angular speeds i.e. less than 10% of the nominal value. The presented methods also allow to generate nominal flux for set zero angular speed in order to achieve excitation of the induction machine. The switching frequencies for both methods are very similar in almost the whole range of control but the methods have shown some differences in control quality, particularly for higher torque values.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 771-778
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault diagnosis of induction motors rotor using current signature with different signal processing techniques
    Autorzy:
    Guezam, Abdelhak
    Bessedik, Sid Ahmed
    Djekidel, Rabah
    Powiązania:
    https://bibliotekanauki.pl/articles/2096189.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    asynchronous machine
    rotor defect
    diagnostic
    signal processing
    FFT
    HT
    WT
    maszyna asynchroniczna
    diagnostyka
    przetwarzanie sygnałów
    Opis:
    The popularity of asynchronous machines, particularly squirrel cage machines, stems from their inexpensive production costs, resilience, and low maintenance requirements. Unfortunately, potential flaws in these devices might have a negative impact on the facility's profitability and service quality. As a result, diagnostic tools for detecting flaws in these types of devices must be developed. Asynchronous machine problems can be diagnosed using a variety of methods. Signal processing techniques based on extracting information from characteristic quantities of electrical machine operation can provide highly useful information about flaws. The purpose of this research is to develop efficient algorithms based on numerous signal processing approaches for correctly detecting asynchronous cage machine rotor defects (rotor bar ruptures).
    Źródło:
    Diagnostyka; 2022, 23, 2; art. no. 2022201
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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