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    Wyświetlanie 1-7 z 7
    Tytuł:
    Experimental results of parallel connected inverters feeding medium voltage transformer
    Autorzy:
    Kozak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/377860.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    electrical transformer
    line side inverter
    inrush currents
    inverter parallel operation
    Opis:
    Development of medium voltage, high power ship electrical installations on board of special purpose vessels, has led to use of grid side inverters along with step-up grid transformers. In this paper there is presented theoretical background and experimental results of two inverters in parallel connection feeding one 0,4/15 kV transformer.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2017, 90; 359-368
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency control of inverter fed induction motor drives
    Autorzy:
    Shaban, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/376136.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    induction motor
    torque-speed characteristic
    inverter
    Opis:
    Induction motor losses at partial loads can be significantly reduced by operating an adjustable frequency drive at the optimum slip which yields maximum efficiency. The present investigation quantifies the potential improvement in induction motor efficiency for both standard and energy efficient motors operating on a six-step voltage-source inverter supply. The analysis employs a comprehensive model of the induction motor which incorporates the frequency - dependent nature of the motor parameters and effects of stray load loss. Efficiency contours are plotted on a torque- speed plane for constant volts/hertz operation and for optimum slip frequency control plotted as a contour map.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2012, 72; 291-295
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A wide-band power electronics current source in reference current generator
    Autorzy:
    Gwóźdź, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/97463.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    control algorithm
    DSP
    inverter
    PWM
    stability of an electrical system
    Opis:
    The paper considers wide-band voltage controlled power electronics current source. The current source has been designed as a part of 1-channel reference current generator designed for current meters testing. The control module of the generator utilizes a specialized Analog Devices Inc. DSPs based microcomputer module for power electronics applications. Used solutions have allowed obtain high quality referencing of the output current within reference signal. The paper presents the structure and selected aspects of the control algorithm of the current source. Also selected investigations results of the laboratory prototype of generator are presented.
    Źródło:
    Computer Applications in Electrical Engineering; 2013, 11; 252-257
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sub-phase power electronics inverters
    Autorzy:
    Gwóźdź, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/97361.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    inverter
    Generalized Sampling Expansion
    Whittaker-Kotelnikov-Shannon sampling theorem
    WKS
    Opis:
    Dynamic changes of parameters of energy sources and receivers are reasons that decrease exactitude of output signals towards reference signals. To improve these parameters more advanced solutions of power electronics systems are necessary. Ones of possible solutions are a sub-phase inverters. The output quantity regulator there is based on Generalized Sampling Expansion, being crucial extension of Whittaker-Kotelnikov-Shannon sampling theorem. Wide-band power electronics current source with regulator based on that extension is analyzed further.
    Źródło:
    Computer Applications in Electrical Engineering; 2011, 9; 190-199
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault tolerant control of a PMSM drive in the selected emergency conditions
    Autorzy:
    Siembab, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/376452.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    PMSM
    PMSM drive
    fault-tolerant inverter
    FTC
    Fault Tolerant Control
    Opis:
    The paper describes an investigation of fault tolerant control strategies for permanent magnet synchronous motor (PMSM) driven by a fault-tolerant inverter. The inverter is a topology-modified inverter with fault-tolerant capability, which can be configured as the standard 3-phase 6-switch inverter and reconfigured as 3-phase 4-switch or 2-phase 4-switch inverter under the fault condition. By analyzing operating principle of a fault-tolerant inverter and the mathematical model of PMSM, fault tolerant control algorithms are investigated. There is a conclusion that three phase stator windings of PMSM can be effectively operated by controlling only two phase currents. Simulation results show the validity of the proposed methods.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 75; 165-172
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation and experimental examinations of voltage inverter and synchronous generator synchronization system with the use of VisualDSP++ 5.0 environment
    Autorzy:
    Kozak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/97413.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    synchronous generator
    machine inverter
    Radix–2 FFT
    synchronization
    DSP
    real–time
    Opis:
    This study describes the operation of the programming algorithm used to synchronize the machine VSI inverter with the rotating synchronous generator. Presented algorithm which bases on the Radix–2 Fourier transform allows to synchronize the inverter with the machine with variable in wide range rotating speed. This study presents the results obtained with use of the simulation software and the auxiliary software created with the use of VisualDSP++ 5.0 development environment and exemplary results of an algorithm operation in the laboratory test stand.
    Źródło:
    Computer Applications in Electrical Engineering; 2016, 14; 210-219
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control system in electric tricycle focused on high dynamics of pedals load torque response
    Autorzy:
    Fabiański, B.
    Wicher, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/377624.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    electric vehicle
    tricycle
    distributed control system
    pedaling by wire system
    CAN network
    electric drive
    BLDC motor
    power inverter
    STM32F4 MCU
    Opis:
    In the article two different control system structures of electric driven tricycle are presented. The very specific feature of the vehicle is that it works with "pedaling by wire". It means, that there is no mechanical coupling between pedals and any of driven wheels. This structure gives an advantage of achieving wide range of the correlation between the pedals load torque and speed and the driven wheels electromagnetic torque and speed. The challenge is to provide a natural pedaling feels for the rider. Two different approaches for control system signal flow are compared for natural pedaling feel for cyclist. The system architecture bases on CAN network distributed control that links three independent wheel drives, dedicated HMI panel, generator inverter and centralized supervisory board. The modelling methods are presented in the paper with an appropriate analytical base. Simulation results of presented control structures follows experimental ones taken from the electric tricycle.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 85; 233-244
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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