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    Wyświetlanie 1-7 z 7
    Tytuł:
    Winding machine additional overload state indication as supporting solution for mine shaft hoist operators
    Autorzy:
    Siostrzonek, Tomasz
    Trójca, Piotr
    Wójcik, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/111362.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    mining shaft hoist
    logger
    winding machine control system
    Opis:
    Dangerous events that take place in the mining plant always give us a chance to rethink whether the design of a faulty device could have been improved enough to prevent such a situation. The same scenario takes place with mining shaft hoist. Withouta doubt, a starting point for discussions about additional mining shaft hoist security measures is the last dangerous situation that took place in a Silesian mine in 2017. This article is an analysis of the probable causes and conclusions that can be drawn from that incident.
    Źródło:
    Mining – Informatics, Automation and Electrical Engineering; 2019, 57, 1; 40-43
    2450-7326
    2449-6421
    Pojawia się w:
    Mining – Informatics, Automation and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhanced Reliability for Winding Machine via New Fault Tolerant Control Based on RST-Backstepping Controller
    Autorzy:
    Haouari, Fouad
    Messekher, Salaheddine
    Bali, Noureddine
    Tadjine, Mohamed
    Boucherit, Mohamed Seghir
    Powiązania:
    https://bibliotekanauki.pl/articles/1955988.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    winding machine
    fault tolerant control
    backstepping control
    RST control
    Opis:
    Due to the external disturbances, model uncertainties, strong coupling, and occurred faults, the winding machine presents a great control challenge. In order to deal with these problems, this paper presents the formulation of a novel scheme of fault tolerant control (FTC) for three-motor web-winding systems; it is concerned with the nonlinear robust backstepping control based on the combination of RST and backstepping controllers where the process is modelled by a nonlinear model. The main contribution of the paper is that the approach developed here summarises the performance of RST and backstepping controllers in order to design a robust controller capable of eliminating external disturbances and sensor faults affecting the system. The stability of the whole system is proven using the Lyapunov theory. Finally, analysis in comparison with the conventional backstepping controller and simulations in the MATLAB environment are accomplished to confirm the efficiency of the proposed method.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 229-241
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel arrangement of combined star-delta stator winding aimed at reduction of copper usage in electric machine
    Nowy układ uzwojenia mieszanego gwiazda-trójkąt w stojanie zmniejszający zużycie miedzi w maszynie elektrycznej
    Autorzy:
    Schreier, L.
    Bendl, J.
    Chomat, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1197468.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    electric machine
    stator
    three-phase winding
    Opis:
    The submitted paper deals with the increased energy efficiency of induction machines by means of the so-called combined stator winding. Two basic variants of this winding, the series and parallel ones, are shown. The suppression of higher harmonics is analysed by means of the method of space vectors and symmetrical components. It is shown that the so-called series variant of the combined winding has a better ability to suppress higher spatial harmonics. The commonly used combined winding has, however, a longer pitch and thus bigger stator resistance and greater consumption of copper. The paper presents a proposal of an adapted combined winding whose pitch is smaller than that of the used three-phase winding. This fact results in decreasing the consumption of copper conductors with preserving the energy efficiency. The results of the analysis have been verified by measurements on physical models of machines with the combined and the adapted combined windings.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2018, 3, 119; 117-122
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control of open-end induction motor by multi-objective GA based selective harmonic elimination PWM to reduce zero sequence currents and torque ripples
    Autorzy:
    Kumar, K. Kalyan
    Anuradha, K.
    Suryakalvathi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/41179745.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Warszawska, Instytut Techniki Cieplnej
    Tematy:
    open-end winding induction machine
    zero sequence currents
    torque ripple
    selective harmonic elimination
    triplen harmonics
    maszyna indukcyjna
    uzwojenie otwarte
    tętnienie momentu obrotowego
    selektywna eliminacja harmonicznych
    potrójne harmoniczne
    Opis:
    A double inverter powered induction motor with open stator winding has few benefits, including excessive error forbearance functionality, great flexibility and lesser rating of DC input voltage etc. For this Configuration, two types of Modules can be implemented: they are Non-Isolated DC link and Isolated DC link. In these two, Non-Isolated DC link is a good choice due to effective DC-link utilization and ruggedness, which is very beneficial in many applications. However, this module produces more zero sequence currents (Z-SC) by means of common mode (CMMD) voltage, which flows through DC bus. The circulation of Z-SC must be as little as possible since it merely rises the amplitude of currents in all phases. High ripple frequency of currents and torque, in addition results in extra loss, which not only reduces the efficiency, but influences loading ability and quickens the aging of drive. The Triplen harmonics can be defined as harmonics with integer of three times the frequency at fundamental, when they are in Phase in all Phases forms the Z-SC. In this paper, a novel SHE method is chosen to target Triplen harmonics in Single DC Source Module (Non- Isolated) and holding preferred fundamental quantity, which aids in improving the torque handling ability of the motor. In addition, the investigation of dual inverter fed OEW-IM with both common DC source as well as separate DC sources is also explored in the SHE for different number of switching angles and variable Modulation Index (MI) towards the torque ripples and Z-SC reduction given. The foremost challenge related to the SHE method is resolving a set of higher order nonlinear equations with a number of variables. A Multi-objective GA method is provided for that challenge which effects the reduction in Z-SC so that torque ripples will be minimized. Moreover, the novel SHE method reduces the number of harmonics better than the conventional SHE, which further decreases TH-D with decent fundamental quantity. For validation, the essential mathematical formulations and simulation results are presented.
    Źródło:
    Journal of Power Technologies; 2023, 103, 1; 72-87
    1425-1353
    Pojawia się w:
    Journal of Power Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field-circuit analysis of AC machine taking into account stator winding asymmetry
    Autorzy:
    Pietrowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813709.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    winding asymmetry
    induction machine
    axial flux
    field-circuit model
    Opis:
    The paper presents the influence of an asymmetry of a stator winding on an axial flux in AC machine. The objective research was performed for selected values of asymmetry. The axial flux was calculated as the sum of flux linkage with stator winding. In order to achieve a magnetic field distribution a dedicated 2D finite element model of AC machine was elaborated. The waveforms of axial flux and torque-time characteristic have been shown. It can be concluded that the asymmetry has significant impact on the axial flux and the pulsation of torque.
    Źródło:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2012, 66, 32; 386-392
    1733-0718
    Pojawia się w:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of properties of induction machine with combined parallel star-delta stator winding
    Analiza właściwości maszyny indukcyjnej z uzwojeniem stojana połączonym gwiazda-trójkąt
    Autorzy:
    Schreier, L.
    Bendl, J.
    Chomat, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1199581.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    induction machine
    parallel combined stator winding
    maszyna indukcyjna
    równolegle polączone uzwojenie stojana
    Opis:
    W artykule przeanalizowano właściwości maszyny z równoległym połączeniem uzwojenia stojana. Analizę prowadzono w zakresie liczby przewodów delta i połączonego w gwiazdę uzwojenia. Przedstawiono wpływ stosunku liczby przewodów tych uzwojeń do możliwości stłumienia wyższych harmonicznych przestrzennych i dotyczących sprawności urządzenia. Pochodne równania maszyny z połączonym uzwojeniem stojana opisują zachowanie maszyny, zarówno w stanie ustalonym, nieustalonym oraz podczas awarii.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2017, 1, 113; 147-153
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Introduction to the Special Section on Intelligent Fault Monitoring and Fault–Tolerant Control in Power Electronics, Drives and Renewable Energy Systems
    Autorzy:
    Malinowski, Mariusz
    Levi, Emil
    Orlowska-Kowalska, Teresa
    Powiązania:
    https://bibliotekanauki.pl/articles/1193706.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    electrical drives
    permanent magnet machine
    induction motors
    sensor fault
    winding fault
    demagnetization fault
    neural networks
    observers
    Opis:
    This article constitutes an introductory part of the special section on Intelligent Fault Monitoring and Fault-Tolerant Control in Power Electronics, Drives and Renewable Energy Systems. In the current issue of the journal, the first part of this section is published. Accepted articles are focussed mainly on the sensor-fault diagnosis methods for T-type inverter-fed dual- three phase PMSM drives, partial demagnetization, faults of the permanent magnet synchronous generator (PMSG) and online open phase fault detection (FD) in the sensorless five-phase induction motor drive implemented with an inverter output LC filter and third harmonic injection. Also, neural networks (NN) application in the detection of stator and rotor electrical faults of induction motors has been proposed in one of the papers, and the observer-based FD concept for unknown systems using input–output measurements was applied to a brushless direct current motor drive with unknown parameters.
    Źródło:
    Power Electronics and Drives; 2019, 4, 39; 163-165
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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