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    Wyświetlanie 1-10 z 10
    Tytuł:
    A single-phase induction motor operating as a self-excited induction generator
    Autorzy:
    Leicht, A.
    Makowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/141000.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    induction generator
    single-phase
    circuit modelling
    self-excited
    induction motor
    Opis:
    The purpose of the paper is the investigation of possibility of utilization of a single-phase induction machine, designed and normally operating as a single-phase capacitor induction motor, as a self-excited single-phase induction generator, which can be used to generate electrical energy from non-conventional energy sources. The paper presents dq model of the self-excited single-phase induction generator for dynamic characteristics simulation and steady-state model based on double revolving field theory with two phase symmetrical components – a forward and backward revolving field for performance of the generator under resistive load. Excitation and load characteristics obtained by simulation showed considerable influence of method of capacitor configuration in the load stator winding on terminal voltage, current and output power of the generator under load. An specific construction of the stator windings together with capacitor requirements to obtain nominal output power at desired self-regulating terminal voltage over the operating range will be the aim of further research.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 3; 361-373
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transient analysis of a railgun with permanent magnets support
    Autorzy:
    Waindok, A.
    Piekielny, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/387510.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    electrodynamic accelerators with permanent magnets
    field-circuit modelling
    transient calculation
    measurement verification
    Opis:
    The calculation and measurement results of transients for an electrodynamic accelerator with permanent magnet support have been presented in this paper. The calculations have been made using the magnetostatic model in the Maxwell software, as well as using a Matlab/Simulink transient model. The waves of mechanical parameters (projectile velocity and acceleration, force) and electric ones (excitation current and capacitor voltage) have been analyzed for different supply conditions (voltage value, capacitance). The efficiency and projectile energy have been studied as well. The mathematical models have been verified experimentally using the original laboratory stand. A good conformity between calculation and measurement results has been obtained.
    Źródło:
    Acta Mechanica et Automatica; 2017, 11, 4; 302-307
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    VHDL-AMS Models for Current Conveyor Based Monolithic Operational Amplifiers
    Autorzy:
    Pandiev, Ivailo M.
    Powiązania:
    https://bibliotekanauki.pl/articles/398082.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    analog circuits
    CCII
    CCCII
    CFOA
    integrated circuit modelling
    VHDL-AMS
    circuit simulation
    układy analogowe
    symulacja obwodowa
    Opis:
    This paper focuses on analysis and behavioral modeling of second generation positive and negative current conveyors (CCII+s, CCII‒s), as well current-controlled current conveyors (CCCIIs). On the basis of the proposed CCII+ model improved behavioral models for three-terminal and four-termi-nal monolithic CFOAs are created. The models are developed by using VHDL analog and mixed-signal (VHDL-AMS) language and the descriptions are adapted to the SystemVision (version 5.5) simulation program, which is a part of the Mentor Graphics system. The proposed models simulate static and dynamic para-meters for differential and common-mode input signals at room temperature, including the parameters input offsets, accurate input impedances, non-dominant poles at differential input signals, AC common-mode rejection, PSRR effects, output impe-dances, slew rate limiting and terminal voltage/current operating ranges. The modeling parameters are extracted for commercially available four-terminal CFOA AD844A and CCCII OPA860 by analyzing semiconductor data books or through characterization measurements. For the validation process simulation and experi-mental results for sample electronic circuits are given.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2018, 9, 1; 34-46
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of a single-phase capacitor induction motor operating at two power line frequencies
    Autorzy:
    Leicht, A.
    Makowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/140512.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    początkowy współczynnik jakości
    silniki indukcyjne
    symulacja
    induction motors
    single-phase
    circuit modelling
    simulation
    starting quality factor
    Opis:
    The paper presents a modelling mathematical tool for prediction of dynamic and steady-states operation of the single-phase capacitor induction motor for different values of the capacitor capacitance and different frequency of voltage supply at no-load and rated load conditions. Developed mathematical model of the capacitor induction motor was implemented for calculation using Matlab/Simulink software. Presented simulation results may be utilized to achieve better starting quality of single-phase capacitor induction motors.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 2; 251-266
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of Dielectric Properties of BiNbO4-Based Microwave Ceramics
    Autorzy:
    Czekaj, D.
    Lisińska-Czekaj, A.
    Garbarz-Glos, B.
    Bąk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/356034.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    BiNbO4 ceramics
    impedance spectroscopy
    simulation and modelling
    quivalent electric circuit method
    Opis:
    In the present paper results of the studies devoted to computer simulations of dielectric response of electroceramics in a frequency domain as well as analysis of the experimental data are given. As an object of investigations BiNbO4-based microwave ceramics was taken. Simulations of the hypothetical impedance response of the ceramic system were performed under assumption of the brick-layer model. A strategy for analysis and modelling of the impedance data for microwave electroceramics was discussed. On the base of the discussed strategy modelling of the dielectric response of BiNbO4 ceramics was performed with the electric equivalent circuit method. The Voigt’s and Maxwell’s circuits were taken as electric models. Parameters of the electric components of the circuits were determined and related to parameters of the ceramic object under study. It was found that fitting quality was good and changed within the range χ2 = 6.78 × 10-4 – 6.77 × 10-5 depending on the model.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1177-1181
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    A reliability-operational analysis of a track-side CCTV cabinet taking into account interference
    Autorzy:
    Paś, Jacek
    Rosiński, Adam
    Białek, Kamil
    Powiązania:
    https://bibliotekanauki.pl/articles/2128147.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    operation
    reliability
    electromagnetic interference
    modelling
    closed circuit television
    CCTV
    operacja
    niezawodność
    interferencja elektromagnetyczna
    modelowanie
    telewizja przemysłowa
    Opis:
    The paper presents issues associated with the impact of electromagnetic interference on track-side cabinets of a closed-circuit television system (CCTV) functioning in a railway transport environment. The measurements of an electromagnetic field emitted by a track-side CCTV cabinet were presented. Designs of this kind are operated in railway facilities; therefore, they should not disturb the functioning of other equipment, the rail traffic control systems, in particular (so-called inner compatibility). An analysis of the obtained results enabled developing a research model, and a further reliability and operational analysis, taking into account electromagnetic interference. This enabled determining a relationship allowing the determination of the probability of a track-side CCTV cabinet staying in a state of full ability. The presented discussions regarding a track-side CCTV cabinet, taking into account electromagnetic interference, allow for the numerical assessment of different types of solutions (technical and organizational), which can be implemented in order to mitigate the impact of electromagnetic interference on a system’s functioning.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136747, 1--11
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The application of Boolean algebra in modelling of leakage condition of a car hydraulic braking system
    Autorzy:
    Idzikowski, A.
    Salamon, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/265849.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    układ hamulcowy
    układ hydrauliczny
    wyciek
    algebra Boole'a
    modelowanie
    braking system
    hydraulic circuit
    leakage
    Boolean algebra
    modelling
    Opis:
    A general characteristics of a car hydraulic braking system (CHBS) is presented in this publication. A graphical model of properties-component objects is developed for the above-mentioned system. Moreover, four mathematical models in terms of logic, the set theory and the Boolean algebra of Boolean functions are developed. The examination is ended with a general model of the CHBS for n - Boolean variables and the construction and mathematical-technical interpretation of this model is presented.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 353-363
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of non-linear losses in an integrated contactless power supply for magnetically levitated elevator systems using discrete circuit elements
    Autorzy:
    Putri, A. K.
    Appunn, R.
    Hameyer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/141742.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    contactless energy transmission
    electromagnetic guiding system
    equivalent circuit model
    ferromagnetic material at high frequency
    magnetically levitated elevator
    modelling of non-linear losses
    Opis:
    A contactless energy transmission system is essential to supply onboard systems of electromagnetically levitated vehicles without physical contact to the guide rail. One of the possibilities to realise a contactless power supply (CPS) is by integrating the primary actuator into the guide rail of an electromagnetic guiding system (MGS). The secondary actuator is mounted on the elevator car. During the energy transmission, load dependent non-linear losses occur in the guide rail. The additional losses, which are caused by the leakage flux penetrating into the guide rail, cannot be modelled using the classical approach of iron losses in the equivalent circuit of a transformer, which is a constant parallel resistance to the mutual inductance. This paper introduces an approach for modelling the load dependent non-linear losses occurring in the guide rail using additional variable discrete circuit elements.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 2; 177-187
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis and simulation modeling of programmable circuits using digital potentiometers
    Autorzy:
    Pandiev, I. M
    Powiązania:
    https://bibliotekanauki.pl/articles/398071.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    mixed analogue digital integrated circuits
    digital potentiometer
    programmable circuits
    frequency domain analysis
    behavioral modelling
    circuit simulation
    analogowo-cyfrowe układy scalone
    potencjometr cyfrowy
    układy programowalne
    analiza dziedziny częstotliwości
    modelowanie behawioralne
    symulacja obwodu
    Opis:
    In this paper an object of analysis and simulation modeling are the basic programmable circuits using CMOS digital potentiometers or Resistive Digital-to-Analog Converters (RDACs). Based on the analysis and principle of operation an improved SPICE-based behavioral model for RDAC potentiometers is created. The model accurately reflects resolution (wiper steps), nominal end-to-end resistance, wiper resistance, linear and nonlinear increment/decrement of the wiper, common-mode leakage current, operating bandwidth, analog crosstalk, temperature coefficients and noise effects. Model parameters are extracted for the dual RDAC potentiometer AD5235 from Analog Devices as an example. The workability of the proposed simulation model is verified by simulation modeling and experimental testing of sample electronic circuits.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2014, 5, 4; 127-135
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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