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    Wyświetlanie 1-3 z 3
    Tytuł:
    Universal System for Detection and Compensation of Current Sensor Faults in Three-Phase Power Electronic Systems
    Autorzy:
    Dybkowski, Mateusz
    Jankowska, Kamila Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/2175934.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    FTC
    fault-tolerant control system
    active rectifier
    current sensor
    PMSM
    permanent magnet synchronous motor
    IM
    induction motor
    diagnostics
    Opis:
    The article discusses the universal current sensor fault detection and compensation mechanism, which can be applied in three-phase power electronics (PE) symmetrical system. The mechanism is based on the assumption that a symmetrical system can be described using different components in the stationary reference frame. The solution given in article as a Cri-base detector was tested in electrical drives with induction motors (IMs) and permanent magnet synchronous motors (PMSMs). This study also proves that the same algorithm can work stable in active rectifier systems. Such an application of this detector has not been previously reported in the literature. The article describes the detection of various types of faults in different phases. The fault-tolerant voltage-oriented control (FTVOC) of an active rectifier is compared with previously described solutions for IMs and PMSMs. By analysing in various types of systems, the work proves the universality of the detector based on Cri markers.
    Źródło:
    Power Electronics and Drives; 2022, 7, 42; 267--278
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simple Technique of Initial Speed Identification for Speed-Sensorless Predictive Controlled Induction Motor Drive
    Autorzy:
    Stando, Dariusz
    Kazmierkowski, Marian P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193851.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    induction motor
    sensorless control
    model predictive control
    MRAS estimator
    initial speed identification
    restarting IM
    Opis:
    This article presents a simple technique of identifying the initial speed that allows for restarting a sensorless induction motor (IM) drive controlled by a model predictive flux control (MPFC). Initial speed identification is required because, according to the research, the applied current-model reference adaptive system (C-MRAS) can restart the IM after failure only if the error of the initial speed set in the estimator is < 25%. The proposed technique is based on short periods of flux generation for the certain initial speed and observation of the estimated torque respond. The direction of the estimated torque determines whether the real speed is higher or lower than the initial one set in the estimator. In two steps, the algorithm identifies the initial speed with an accuracy of 25%. This allows for a quick restart of the IM from any speed, eliminating the disadvantage of the sensorless drive control system with the C-MRAS speed estimator. The experimental results measured on a 50 kW drive which illustrates the operation and performances of the system are presented.
    Źródło:
    Power Electronics and Drives; 2020, 5, 40; 189-197
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensorless Induction Motor Drive Based on Model Reference Adaptive System Scheme Utilising a Fictitious Resistance
    Autorzy:
    Hajji, Soufien
    Chehida, Ramzi Ben
    Zayani, Hichem
    Bouaziz, Noomen
    Zorgani, Youssef Agrebi
    Powiązania:
    https://bibliotekanauki.pl/articles/1193902.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    indirect stator flux-oriented controller model
    ISFOC model
    model reference adaptive system
    MRAS
    fictitious resistance
    rotor speed estimation
    induction motor
    IM
    Opis:
    This article presents a new development of an indirect stator flux-oriented controller for sensorless speed induction motor drive utilising instantaneous and steady-state values, respectively, of a fictitious resistance symbolised as R_f. The dimension of the fictitious quantity, in this context, is the ohm, which is the difference between the stator d- and q-axis fictitious resistances. However, from the measurement of the stator voltage and currents of the machine, two independent resistance estimators are built. Therefore, the first is considered as a reference model of the induction machine (IM), and the second is considered as an adjustable model. Subsequently, the error between the states of the two models is used to drive a suitable adaptation mechanism that generates the estimation of the speed, for the adjustable model. Furthermore, the structure of the proposed estimator is free from stator resistance and eliminates the requirement of any flux computation. All the detailed simulation study is carried out in MATLAB/Simulink to validate the proposed method and to highlight the robustness and the stability of the proposed model reference adaptive system estimator.
    Źródło:
    Power Electronics and Drives; 2020, 5, 40; 199-212
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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