Temat: torque moment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Induction motor analysis employing optimal torque predictor and massive conductor approach
Autorzy:: Bernatt, J.
Stępień, S.
Powiązania:: https://bibliotekanauki.pl/articles/141414.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: metoda elementów skończonych
prąd wirowy
moment obrotowy
finite element method
eddy current
torque
prediction
Opis:: This research presents a method for the simulation of the magneto-mechanical system dynamics taking motion and eddy currents into account. The major contribution of this work leans on the coupling the field-motion problem considering windings as the current forced massive conductors, modelling of the rotor motion composed of two conductive materials and the torque calculation employing the special optimal predictor combined with the modified Maxwell stress tensor method. The 3D model of the device is analysed by the time stepping finite element method. Mechanical motion of the rotor is determined by solving the second order motion equation. Both magnetic and mechanical equations are coupled in the iterative solving process. Presented method is verified by solving the TEAM Workshop Problem 30.
Źródło:: Archives of Electrical Engineering; 2010, 59, 1-2; 99-107
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Global and distributed torque calculations using the CDSA approach
Autorzy:: Li, M.
Lowther, D.A.
Powiązania:: https://bibliotekanauki.pl/articles/140380.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: moment obrotowy
analiza wrażliwości
maszyna elektryczna
torque calculation
distributed torques
sensitivity analysis
electrical machines
Opis:: Accurate force and torque calculations are fundamental to being able to predict the operation of an electromechanical device or system. The Maxwell stress tensor and the virtual work principle are the two major theories for force and torque calculation. However, if local distributions of torque are needed to couple to structural and vibration analyses, the conventional Maxwell stress approach cannot provide this easily. A recently developed approach based on sensitivity analysis has the capability to deliver local stress and torque as well as accurate global results. In addition, this approach divides the total torque into different components which are essential to the design of electrical devices. This paper includes several numerical examples of torque calculations of different electrical machines. The results are verified by a commercial software package using the Maxwell stress based force calculation.
Źródło:: Archives of Electrical Engineering; 2011, 60, 4; 459-471
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Conformal mapping approach for permanent magnet synchronous machines: on the modeling of saturation
Autorzy:: Hafner, M.
Franck, D.
Hameyer, K.
Powiązania:: https://bibliotekanauki.pl/articles/140510.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: moment obliczeniowy
pole magnetyczne
SM-PMSM
conformal mapping
air gap permeance
magnetic field
torque computation
Opis:: In the electromagnetic field simulation of modern servo drives, the computation of higher time and space harmonics is essential to predict torque pulsations, radial forces, ripple torques and cogging torque. Field computation by conformal map ping (CM) techniques is a time-effective method to compute the radial and tangential field components. In the standard CM approach, computational results of cogging torque simulations as well as overload operations observe deviations to nonlinear finite element (FE) simulations due to the neglection of slot leakage and saturation effects. This paper presents an extension of the classical CM. Additional CM parameters are computed from single finite element computations so as to consider both effects listed above in the model over a wide operation range of the electrical drive. The proposed approach is applied to a surface permanent magnet synchronous machine (SM-PMSM), and compared to numerical results obtained by finite element analysis (FEA). An accuracy similar to that of FE simulations is obtained with however the low computation time that is characteristic for analytical models.
Źródło:: Archives of Electrical Engineering; 2012, 61, 2; 211-220
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Study of delta/polygon-connected transformer-based 36-pulse ac-dc converter for power quality improvement
Autorzy:: Abdollahi, R.
Powiązania:: https://bibliotekanauki.pl/articles/140490.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: jakość energii
prostownik 36-pulsowy
bezpośredni moment obrotowy silnika indukcyjnego sterowanego napędem
AC-DC converter
delta/polygon transformer
power quality
direct torque controlled induction motor drive (DTCIMD)
Opis:: Design of a delta/polygon-connected autotransformer based 36-pulse ac-dc converter is presented in this paper. The 36-pulse topology is obtained via two paralleled eighteen-pulse ac-dc converters each of them consisting of a nine-phase (nine-leg) diode bridge rectifier. For independent operation of paralleled diode-bridge rectifiers, two interphase transformers (IPT) is designed and implemented. A transformer is designed to supply the rectifier. The design procedure of magnetics is in a way such that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. The proposed structure has been implemented and simulated using Matlab/Simulink software under different load conditions. Simulation results confirmed the significant improvement of the power quality indices (consistent with the IEEE-519 standard requirements) at the point of common coupling. Furthermore, near unity power factor is obtained for a wide range of DTCIMD operation. A comparison is made between 6-pulse and proposed converters from view point of power quality indices. Results show that input current total harmonic distortion (THD) is less than 4% for the proposed topology at variable loads.
Źródło:: Archives of Electrical Engineering; 2012, 61, 2; 277-292
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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