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1
Content available Application of extended Kalman filter for estimation of periodic disturbance and velocity ripple reduction in PMSM drive
Niewiara Ł. J., Tarczewski T., Grzesiak L M.
Bulletin of the Polish Academy of Sciences. Technical Sciences
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2020
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Vol. 68, nr 5
983--995
EN
In this paper an application of extended Kalman filter (EKF) for estimation and attenuation of periodic disturbance in permanent magnet synchronous motor (PMSM) drive is investigated. Most types of disturbances present into PMSM drive were discussed and described. The mathematical model of the plant is presented. Detailed information about the design process of the disturbance estimator was introduced. A state feedback controller (SFC) with feedforward realizes the regulation and disturbance compensation. The theoretical analysis was supported by experimental tests on the laboratory stand. Both time- and frequency-domain analysis of the estimation results and angular velocity were performed. A significant reduction of velocity ripple has been achieved.
2
Content available remote Jednofazowy mostkowy przekształtnik DC-AC z tranzystorami GaN GIT
Wydźgowski L., Niewiara Ł. J., Tarczewski T., Grzesiak L M., Zieliński M.
Przegląd Elektrotechniczny
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2018
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R. 94, nr 3
111--115
PL
W niniejszym artykule przedstawiono jednofazowy mostkowy przekształtnik napięcia z tranzystorami GaN GIT. W pracy omówiono zastosowaną topologię przekształtnika oraz przedstawiono strukturę zaprojektowanych sterowników bramkowych.. Na podstawie badań eksperymentalnych dokonano analizy sprawności układu dla wybranych częstotliwości przełączania oraz analizy częstotliwościowej wąskopasmowej oraz szerokopasmowej obejmującej badanie zawartości harmonicznych w odtwarzanym sygnale napięciowym dla częstotliwości przełączania 100 kHz, 200 kHz oraz 500 kHz.
EN
In this paper a single phase bridge voltage inverter with GaN GIT transistors is investigated. The article discusses the applied topology of the converter and presents the structure of the designed gate drivers. An analysis of the system efficiency for different switching frequencies (100 and 200 kHz) and harmonic analysis was carried out. Narrow and wideband harmonic analyzes were performed on the produced output voltage signal for switching frequencies at the level of 100,200 and 500 kHz.
3
Content available remote DC-DC converter based on silicon carbide (SiC) power devices with P+ based current controller
Niewiara Ł. J., Tarczewski T., Grzesiak L M.
Przegląd Elektrotechniczny
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2016
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R. 92, nr 6
18--24
EN
In this paper an investigation of voltage control system with P+ current controller for a DC-DC converter is presented. A DC-DC converter based on silicon carbide power devices were used. Synchronous buck topology is used for converter structure. Mathematical model of the converter is presented. The dependence between converter working conditions (i.e. input voltage, load current, switching frequency) and passive LC components is also given. A modified current control method based on P+ structure is considered. Proposed algorithm is compared with a traditional cascade structure based on PI type controllers. Output voltage and coil current dynamics were investigated. Experimental tests results were presented.
PL
W artykule przedstawiono wyniki badań układu regulacji napięcia przetwornicy DC-DC z regulatorem prądu typu P+. Zastosowano przetwornicę DC-DC z łącznikami na bazie węglika krzemu. Przetwornica została wykonana w topologii obniżającej napięcie. Przedstawiony został model matematyczny przetwornicy. Opisano także zależność pomiędzy warunkami pracy przetwornicy (np. napięcie wejściowe, prąd obciążenia, częstotliwość kluczowania) a parametrami elementów pasywnych LC. Przedstawiono propozycję struktury zmodyfikowanego regulatora prądu typu P+. Rozważany algorytm porównano z tradycyjnym algorytmem PI. Przedstawione badanie eksperymentalne dotyczą dynamiki napięcia wyjściowego oraz prądu dławika.
4
Content available Application of artificial bee colony algorithm to auto-tuning of state feedback controller for DC-DC power converter
Tarczewski T., Niewiara Ł. J., Grzesiak L M.
Power Electronics and Drives
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2016
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Vol. 1 (36), No. 2
83--96
EN
The article presents an auto-tuning method of state feedback voltage controller for DC-DC power converter. The penalty matrices employed for calculation of controller’s coefficients were obtained by using nature-inspired artificial bee colony (ABC) optimization algorithm. This overcomes the main drawback of state feedback control related to time-consuming trial-and-error tuning procedure. The optimization algorithm takes into account constraints of selected state and control variables of DC-DC power converter. In order to meet all control objectives (i.e., fast voltage response and chattering-free control signal) an appropriate performance index is proposed. Proper selection of state feedback controller (SFC) coefficients is proven by simulation and experimental tests of DC-DC power converter.
5
Content available Analysis of circuit and operation for DC–DC converter based on silicon carbide
Niewiara Ł. J., Tarczewski T., Grzesiak L. M.
Computer Applications in Electrical Engineering
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2016
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Vol. 14
268--279
EN
In this paper operating analysis of DC–DC converter is presented. Silicon Carbide based DC–DC converter is investigated. SiC power switches (i.e. MOSFETs and diodes) were used. Synchronous buck topology is applied for converter structure. The DC–DC converter mathematical model is also presented. The parameters of LC circuit were calculated using shown equations. Working conditions determine the values of output LC circuit (inductance and capacitance). Real power semiconductors are equipped in output and input capacitances. This feature may influence the generated input signal. Parasitic capacitances and inductances of the paths causes oscillations and voltage overshoots of the input PWM signal. To avoid such phenomenon, it is necessary to use a snubber circuit. This issue is also presented. The analysis of working conditions is presented for different switching frequencies. The size of passive components (LC) is compared for different operating points. Experimental tests results were presented. Waveforms of voltage and current signals were also shown.
6
Content available Experimental study of snubber circuit design for SiC power MOSFET devices
Niewiara Ł. J., Skiwski M., Tarczewski T., Grzesiak L. M.
Computer Applications in Electrical Engineering
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2015
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Vol. 13
120--131
EN
In this paper a design process of snubber circuit for DC\DC converter is presented. Computer simulation and experimental tests were carried out. Due to the presence of parasitic LC (inductance and capacitance) circuit in the power stage, it is necessary to use an additional snubber circuit for voltage overshoot and oscillations reduction. A simulation model of the converter with parasitic circuit was designed. Six topologies of snubber circuits (C, single C, RC, single RC, RCD, single RCD) were investigated in simulation tests. Simulation model of the proposed system has been investigated in Matlab/Simulink/PLECS environment. Input signal parameters like voltage overshoot, rise time, fall time were compared for considered snubber circuits. Experimental tests were carried out for the best simulation results. It confirm the proper choice of snubber circuit.
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