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1
Content available Comparative analysis of the power parameters of a line start permanent magnet synchronous motor using professional FEM packages and in-house software
Baranski Mariusz
Archives of Electrical Engineering
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2023
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Vol. 72, nr 3
585--596
EN
The paper discusses the methods for calculating the power parameters of a line start permanent magnet synchronous motor (LSPMSM). The calculations have been performed using the author’s specialized FEM software and professional FEM packages, ANSYS Maxwell and COMSOL Multiphysics. The author’s algorithm for solving equations of the electromagnetic field based on the FEM has been presented. The in-house software developed on this algorithm and professional software have been used to analyse the power parameters of the LSPMS motor. In addition, both calculation time and accuracy were analysed. The calculation results were compared to the measurement results.
2
Content available remote Pomiary prędkości pojazdów w kontroli ruchu drogowego
Księżopolski Jacek
Paragraf na Drodze
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2019
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Nr 3
11--29
PL
Artykuł przedstawia zarys problematyki pomiarów prędkości pojazdów w procedurze kontroli ruchu drogowego. Przedstawiono w nim główne metody pomiarów, wskazano ich specyficzne cechy, w tym ograniczenia stosowania. Zaprezentowano i scharakteryzowano przyrządy najczęściej spotykane na polskich drogach. Omówiono akty prawne dotyczące przyrządów wykorzystywanych w pomiarach prędkości pojazdów w kontroli ruchu drogowego i wskazano ułomności istniejących regulacji prawnych. W artykule odniesiono się również do możliwości weryfikacji pomiarów prowadzonych za pomocą poszczególnych rodzajów przyrządów i zamieszczono ich przykłady.
EN
The article presents an outline of the problems concerning vehicle speed measurements in the road traffic control procedure. The main measurement methods are discussed together with their specific characteristics including limitations of applicability. The measurement instruments most frequently used on the Polish roads are described. The legal acts concerning the instruments for vehicle speed measurements in road traffic control are discussed and the deficiencies of the current legal regulations pointed out. The possibilities of verification of the measurements made with particular types of instruments are also addressed and illustrated by some examples.
3
Content available An analysis of a start-up process in LSPMSMs with aluminum and copper rotor bars considering the coupling of electromagnetic and thermal phenomena
Baranski Mariusz, Szelag Wojciech, Lyskawinski Wiesław
Archives of Electrical Engineering
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2019
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Vol. 68, nr 4
933--946
EN
The paper presents an FE model of coupled electromagnetic and thermal phenomena in Line Start Permanent Magnet Synchronous Motors (LSPMSMs). An algorithm for solving equations of a discrete model using the FEM has been presented. On the basis of this algorithm the author’s personally developed software for the analysis of coupled electromagnetic-thermal phenomena in the LSPMS motors was elaborated. This software was used to analyze the start-up process of motors with identical stator and rotor magnetic circuits and different materials of the starting cage. The start-up process of motors with the squirrel-cage made of aluminum and copper was considered. The influence of temperature on the start-up process has been taken into account. The results of simulation tests were compared with the results of measurements.
4
Content available Applying a fractional coil model for power system ferroresonance analysis
Majka Ł.
Bulletin of the Polish Academy of Sciences. Technical Sciences
|
2018
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Vol. 66, nr 4
467--474
EN
This paper addresses the problem of modeling the nonlinear coil used for ferroresonant circuit analysis. The effect of ferroresonance is described and a general modeling approach is presented. The hysteresis modeling problem is also shortly discussed, on the example of a ferromagnetic coil. A brief overview of available literature and contributors to this area are provided. A series RLC circuit supplied from an AC source is discussed. The application of the fractional derivative in the modeling of an iron core coil is presented and suggestions of model implementations are given. The computations performed are illustrated by means of waveform data obtained from computer simulations and compared with those obtained from measurements performed in a specially prepared laboratory setup.
5
Content available remote Transient analysis of a railgun with iron core
Waindok A., Piekielny P.
Przegląd Elektrotechniczny
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2017
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R. 93, nr 2
152--155
EN
A calculation and measurement results of transients for an iron-core electrodynamic launcher have been presented in the paper. The magnetostatic field calculations have been made with using the Maxwell-ANSYS software, while the circuit part of the mathematical model has been implemented in MATLAB/Simulink package. The measurement verification has been carried out with using the original laboratory stand. The transients of excitation current, capacitor voltage and projectile velocity have been compared. A good conformity between calculation and measurement results has been obtained.
PL
W pracy przedstawiono wyniki obliczeń i pomiarów sygnałów zmiennych w czasie dla wyrzutni elektrodynamicznej z rdzeniem ferromagnetycznym. Do obliczeń pola magnetostatycznego wykorzystano program Maxwell-ANSYS, natomiast część obwodową modelu matematycznego zaimplementowano w pakiecie MATLAB/Simulink. Porównano ze sobą przebiegi prądu wzbudzenia, napięcia na kondensatorach oraz prędkości wylotowej elementu ruchomego (pocisku). W obliczeniach dodatkowo wyznaczono siłę działającą na pocisk oraz jego przyspieszenie.
6
Content available Transient analysis of a railgun with permanent magnets support
Waindok A., Piekielny P.
Acta Mechanica et Automatica
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2017
|
Vol. 11, no. 4
302--307
EN
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.
7
Content available Pomiarowa ocena jakości drgań sekcji elektrod zbiorczych elektrofiltru
Nowak A. P.
Pomiary Automatyka Kontrola
|
2011
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R. 57, nr 3
277-280
PL
W artykule scharakteryzowano zastosowaną aparaturę pomiarową oraz sposób realizacji pomiarów przyspieszeń w punktach kontrolnych elektrod zbiorczych. Przedstawiono własną metodologię opracowywania wyników pomiarów, umożliwiającą jej stosowanie do walidacji modeli numerycznych lub oceny jakości drgań sekcji elektrod. Wstępne analizy, przeprowadzone na usystematyzowanych zbiorach danych, wskazały kierunki postępowania przy walidacji modeli numerycznych stosowanych do symulacji dynamicznych.
EN
Electrostatic precipitators (Fig. 1) are used for dust removal and their efficiency influences the environment. However, the effectiveness of these devices depends on many factors [1-10]. One of them is the efficiency of a periodic cleaning of the collecting electrodes (Fig. 1, pos. nZE) - the dust is removed by inducing vibrations at accelerations. These vibrations are caused by axial impact of a beater (Fig. 2, pos. US) on a dust-removal bar. In the course of impact and after its finish the impact stresses are produced in both - shaking down and collecting electrodes - systems. These processes have been the subject of numerous works, e.g. they are dealt with in [11, 12, 13] and many others. The results of calculations obtained by means of the method described in [14] are compared with those obtained from measurements. The paper briefly characterizes the measurement equipment (Tab. 1) used and the manner of measurements (Fig. 2). The author also presents his own methodology (Section 3), enabling applying it for validation of numerical models (Section 4) of one of the collecting electrode sections (Fig. 1, pos. ZEP). In conclusion it can be stated that the preliminary analysis carried out on such a systematic collection of data shows the directions for further procedures on validating numerical models for dynamic simulations.
8
Content available remote Comparison of the cone-tracing simulation and the room impulse response measurements
Pękala P.
Archives of Acoustics
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2006
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Vol. 31, No. 1
47-56
EN
The experimental verification of the acoustic field model based on the cone-tracing method [1, 2] is described. With simulated echograms and the impulse responses obtained experimentally, a set of parameters: Early Decay Time (EDT), C50 and C80 were obtained. The parameters measured at many receiving sites and those calculated were compared. Mean differences of less than 2 dB were observed for the octave band mid-frequencies above 125 Hz.
9
Weryfikacja pomiarowa dokumentacji instalacji energetycznych
Kabza Z., Kwiatkowski L. J.
Dozór Techniczny
|
2004
|
z. 4
89--91
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