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    Tytuł:
    Oscylacje w filtrach wejściowych przekształtnikowych napędów trakcyjnych
    Oscillations in input filters of converter-based traction drives
    Autorzy:
    Dudek, R.
    Kosiorowski, S.
    Stobiecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1373077.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    napęd trakcyjny
    filtr wejściowy
    kondensator
    Opis:
    LC input filters are applied in the traction drives with DC or AC motors controlled with the power electronic systems. As follows from experience in operation of the electric mine locomotives the most frequent reason for faults of these systems are faults of the filter's capacitors. Oscillations of voltage and current during the transient states of the drive operation can be one of the reasons for the damage of the capacitors. In this paper, special attention is paid to the angular frequency of oscillations of the voltage across the filter capacitor in transient states of drive operation. This quantity can be used in diagnostic and elimination of fault operation of the power electronic systems of the vehicles' drives. On the basis of a simplified model of the traction system, non-linear equation describing the system is formulated, linearized characteristic equation is given and minimum value of the filter capacity ensuring stable operation of the system is determined. The relationship determining the angular frequency is derived. The analysis of the influence of the filter capacity, inductance and resistance of the traction network, supply source voltage and power of the drive on the angular frequency of the oscillations of the voltage across the filter capacitor is carried out using simulations in the IsSpice program. Selected results of tests of the laboratory traction drive system equipped with a traction motor of the mine locomotive type Ld 31 are presented in the last section of the paper.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2010, 86; 5-10
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane zagadnienia stabilności trakcyjnych układów napędowych sterowanych impulsowo
    Selected problems of stability of pulse-mode controlled traction drive systems
    Autorzy:
    Kosiorowski, S.
    Stobiecki, A.
    Żuchowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2076317.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    silnik trakcyjny
    sterowanie napędem
    lokomotywa
    układ napędowy
    Opis:
    New controllable power semiconductor devices make the high frequency pulse-mode operation of the power electronic converters in traction drive systems possible. The capacity and inductance of the converter input filter limiting the ripple of the traction network voltage and current can be decreased for this reason. However, the significant change of the parameter values of these elements can be unacceptable due to necessity to ensure the stable operation of the pulse-mode control system. Results of analytical research, computer-aided simulation and laboratory research concerning stability of the pulse-mode controlled drive system with the electric mining locomotive's traction motor are presented in this paper. On the basis of the traction system simplified model consisting of the energy source, traction network, input filter and drive system, the analysis of system operation was carried out. The non-linear differential equations describing the system were formulated and the points of balance were calculated. The relationships concerning the minimum value of the filter capacity ensuring proper work of the system were obtained on the basis of stability conditions. The waveforms of voltages in the system in stable and unstable working conditions obtained as result of computer simulation using Maple program are shown in the paper. Selected results of laboratory tests of the stability of the traction drive system equipped with the current and speed controllers are also shown here. The specific attention was paid to the influence of the filter capacitor capacity, line resistance and load current on the filter capacitor voltage fluctuations.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2006, 75; 77-82
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmodyfikowany filtr wejściowy przekształtnikowych napędów trakcyjnych
    Modified input filter of converter-based traction drives
    Autorzy:
    Dudek, R.
    Kosiorowski, S.
    Stobiecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1372386.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    filtr wejściowy
    napęd trakcyjny
    przekształtnik
    Opis:
    New fully controlled semiconductor power switches make considerable increase of operation frequency of converters in traction drives possible. Considering undesirable consequences of pulse current flow in the supply source and in the traction network, the increase of the converter's operation frequency allows to significant decrease of the capacitance and inductance of the input filter's components. However, the decrease of the parameter values of these components can be unacceptable due to instable operation of the drive system, which results in appearance of low-frequency undamped oscillations in the current and voltage waveforms of the input filter's capacitor. Various methods of damping these oscillations presented in the literature, for example increasing of the capacitance of the filter's capacitor, inserting an additional resistor or specific control strategies have some disadvantages and are not always effective. A method to limit the unstable region of operation of the traction drive through appropriate solution of the input filter system assuming that the mass and dimensions of the filter components are not bigger and the cost is not higher than in case of commonly applied LC filter has been suggested in the paper. Results of research of the features of the modified input filter and the results of comparison analysis between this filter and the LC type Γ filter have been presented. Special attention was paid to the stable operation region and to fluctuations of current and voltage in the filter system. The research was carried out using the IsSpice simulation program and the Maple computer algebra system.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2011, 2, 90; 199-204
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stany przejściowe w filtrach wejściowych napędów trakcyjnych sterowanych impulsowo przy pracy silnikowej i prądnicowej
    Transient states in input filters of pulse-mode controlled traction drives in motoring and generating mode of operation
    Autorzy:
    Dudek, R.
    Kosiorowski, S.
    Stobiecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1374145.pdf
    Data publikacji:
    2008
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    napęd trakcyjny
    silnik trakcyjny
    filtr wejściowy
    Opis:
    Analysis of stable operation conditions of the input filters of the mine locomotives' drive systems was presented in the paper. Equations describing the drive system in various operation states were formulated on the basis of a simplified model of the traction system. The points of balance were obtained and linearization of the system was carried out using the power series method and Jacobi matrix. Conditions of stable operation concerning the minimum value of the input filter capacitance depending on the parameters of the supply source and traction network and also on the characteristics and operation states of the drive were given. Special attention was paid to the analysis of the stable operation conditions in the generating mode during braking. Selected results of simulation and laboratory tests concerning the stable operation conditions of the input filter of the drive system of the pulse-mode controlled mine locomotive were presented. Laboratory tests were carried out using a laboratory stand equipped with a 45 kW traction motor of the mine locomotive type Ld 31.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2008, 80; 113-118
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sterowanie prądem wzbudzenia silników trakcyjnych lokomotyw kopalnianych
    Control of the field current of the mine locomotives traction motors
    Autorzy:
    Dudek, R.
    Kosiorowski, S.
    Stobiecki, A.
    Żuchowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2076371.pdf
    Data publikacji:
    2007
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    sterowanie prądem
    pole magnetyczne
    silnik trakcyjny
    lokomotywa kopalniana
    Opis:
    In the majority of electric trolley locomotives operated in Polish mines, a significant (3:1) main poles' field weakening in the traction machines is necessary. In the paper, special attention was paid to an analysis and results of laboratory tests of a transistor-based system designed for a pulse-mode control of the traction motors' excitation current of the locomotive type Ld31 (90 kW). A capacitor connected in parallel to the excitation winding of the traction motor is discharged through an resistor in the described system. Consequences of the significant differences in the current overload capacity of power transistors and SCR thyristors were presented. The relationships between a field weakening rate and an armature current for different switch duty ratios of the transistor were obtained on the basis of an approximate analysis of the system operation. The steady-state characteristic curves of the excitation current versus the armature current and power losses in the resistor were found using Maple computer algebra system. Results of the laboratory tests concerning the relationship between the excitation current and the armature current and selected oscillograms of the voltage and current waveforms were also shown.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2007, 77; 65-70
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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