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    Wyświetlanie 1-9 z 9
    Tytuł:
    Conductance-controlled global-compensation-type shunt active power filter
    Autorzy:
    Szromba, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/140436.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    shunt active power filter
    active current
    indirect control method
    instantaneous compensation
    load equivalent conductance
    energy flow control
    Opis:
    This paper presents a load equivalent conductance based control method for a shunt active power filter. The principle of energy balance in the circuit, which means between supplying source - active filter - load, is used to obtain the control formula. The natural inertia of the active filter action is exploited, so no PI regulators are needed. The active filter can compensate for non-active current and, additionally, can stabilise the supplying source active power. In a case of generating loads energy harvesting is possible. The presented method is useful as well for voltage-source as current-source inverter based active filters, and for DC system as well as for AC single- or three-phase one.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 2; 259-275
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of fault states in drive systems with multi-phase induction motors
    Autorzy:
    Listwan, Jacek Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/141008.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Direct Field-Oriented Control method
    Fault Tolerant Control
    MRASCC estimator
    multi-phase squirrel-cage induction moto sensorless drives
    Voltage Source Inverter faults
    Opis:
    The paper presents the analysis of different fault states in drive systems with multiphase induction motors. The mathematical models of a five-phase and six-phase induction motor and the MRASCC estimator have been presented and the description of the Space Vector Modulation has been shown. The Direct Field-Oriented Control (DFOC) system is analyzed. Results of the simulation and experimental studies of the Direct Field-Oriented Control systems in the fault conditions are presented. The author’s original contribution includes analysis and studies of the DFOC control method of a five-phase induction motor resistant to the motor speed sensor fault with the use of the MRASCC estimator.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 4; 817-830
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of a double cross limiting method in a lime mixing and milling system
    Autorzy:
    Mikoś, Z.
    Jachimski, M.
    Wróbel, G.
    Hayduk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/140636.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    control systems
    double cross limiting method
    programmable controllers
    Opis:
    The article presents the adaptation of the setpoint calculation algorithm with limitation using the double cross method, known from the fuel-air regulation systems, in the system for mixing two sorts of lime, enabling the start of the process line without additional start-up procedures. The authors modified the standard double cross algorithm in order to enable the start of the system without special start-up procedures, while maintaining all the features of the algorithm. The results of the tests of the modified algorithm in the lime milling and mixing system are also presented.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 1; 5-16
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of minimum energy control on steel loss in VR stepper motor
    Autorzy:
    Bernat, J.
    Kołota, J.
    Stępień, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/141426.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    energy consumption
    lamination
    finite element method
    optimal control
    Opis:
    This research presents a 3D FE method for the simulation of the variable reluctance stepper motor dynamics. The proposed model is used to obtain the optimal minimum energy control law that minimizes the energy injected by the controller. The method is based on the strong coupling of field - circuit equations and extended to eddy current, motion and nonlinearity problem. The linearization technique for the coupled problem is presented. Also the lamination of the motor core is considered. In the paper the open - loop control problem is analyzed. The proposed model is validated by the comparison with measurements. Next, to demonstrate the effectiveness of the proposed optimal minimum energy control method is applied. In both cases, the examination of the variable reluctance stepper motor dynamics and the steel loss in the core is presented and compared.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 3; 439-447
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of control parameters on synchronization stability of virtual synchronous generator
    Autorzy:
    Zhang, Yanxia
    Cheng, Yachao
    Liu, Kaixiang
    Han, Yue
    Powiązania:
    https://bibliotekanauki.pl/articles/2172794.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    control parameter
    frequency modulation coefficient
    phase plane method
    synchronization stability
    virtual synchronous generator
    Opis:
    Different from the synchronization mechanism of synchronous generators, the non-synchronous generators must be synchronized with the grid through a controller. Generally, the virtual synchronous generator (VSG) control strategy is adopted for this purpose. In view of the current situation, where the control loops are not comprehensively considered in the research of the synchronization stability of the VSG, this paper considers multiple control loops, such as active frequency loops, virtual governors, power filters and current constraint control, to establish the mathematical model of the VSG and infinite system. On this basis, the correlation formula between power angle difference and control parameters is deduced. Adopting the phase plane method, the influence of different control loops and their parameters on the transient synchronization stability is analyzed. Finally, a setting principle of the frequency modulation coefficient of virtual governors is proposed, which not only meets the response speed of control systems, but also has good control performance.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 4; 811--828
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modified algorithms of direct power control of AC/DC converter co-operating with the grid
    Autorzy:
    Kulikowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/141289.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    DPC
    optymalizacja sposobu DPC
    nieliniowe sterowanie
    optimization of DPC method
    three-level converter
    nonlinear control
    Opis:
    This paper briefly describes direct power control methods for two- and threelevel AC/DC converters and their modified DPC 3H 2-? and the DPC 5H2-? algorithms. It also presents two new control methods DPC-3Am (direct power control 3 areas with modification) and the DPC-3L-3Am (direct power control 3 levels 3 areas with modification). The research results were used to compare the described methods. The comparison was based on an average value of switching frequency and current distortion coefficient. Experimental investigations into the methods have shown that the use of the modified DPC methods reduces the number of switchings by more than 70% compared with the standard DPC method.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 3; 373-388
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An inductance lookup table application for analysis of reluctance stepper motor model
    Autorzy:
    Bernat, J.
    Kołota, J.
    Stępień, S.
    Szymański, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/141315.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silnik krokowy
    metoda elementów skończonych
    tablica przeglądowa
    stepper motor
    finite element method
    control
    inductance lookup table
    Opis:
    This research presents a method of modeling and numerical simulation of a reluctance stepper motor using reduced finite-element time-stepping technique. In presented model, the circuit equations are reduced to non-stationary differential equations, i.e. the inductance mapping technique is used to find relationship between coil inductance and rotor position. A strongly coupled field-circuit model of the stepper motor is presented. In analyzed model the magnetostatic field partial differential equations are coupled with rotor motion equation and solved simultaneously in each iterative step. The nonlinearity problem is solved using Newton-Raphson method with spline approximation of the B-H curve.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 1; 15-21
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of commutation conditions on steady states in matrix converter
    Autorzy:
    Borkowski, D.
    Sobczyk, T. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/141341.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    przekształtnik macierzowy
    regulacja przepływu mocy
    metoda bilansu harmonicznych
    matrix converter
    power flow control
    harmonic balance method
    Opis:
    The paper investigates a significant influence of transients on steady states in a matrix converter with the one-periodic control strategy. Proposed controller can be used as an interconnection device within a power system for a power flow control. However, the presence of inductances in external systems has the significant influence on steady state of a matrix converter operation. The special current injection method has been developed to ensure a proper operation of a matrix converter. Presented analysis of steady states is carried out in a frequency domain using the harmonic balance method. Obtained numerical results, which are confirmed by a time domain analysis, prove the effectiveness of the proposed method.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 1; 77-83
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A coupled field-circuit model of a 5-phase permanent magnet tubular linear motor
    Autorzy:
    Tomczuk, B.
    Waindok, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/141318.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silnik synchroniczny liniowy
    magnes trwały
    PMLSM
    metoda polowo-obwodowa
    symulacja
    parametry sterowania
    permanent magnet linear synchronous motors
    field-circuit method
    simulation of the transients
    control parameters
    Opis:
    A method for modeling of the dynamics characteristics for a 5-phase permanent magnet tubular linear motor (PMTLM) is presented. Its electromagnetic nonlinear field analysis with finite element method (FEM) has been coupled with the circuit model. The calculation model includes the equations for electrical circuits and mechanical quantities as well. They have been obtained using Lagrange's method. The calculated and measured waves of the mover position have been compared for several values of the excitation current. This comparison yields a good agreement. Presented calculation model is very useful in designing and optimization of the PMTLM and in the calculation of the parameters for the control algorithms intended for such a type of actuators.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 1; 5-14
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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