The gearless, grid-connected, 6-phase asymmetric wind turbine generator system

Gołębiowski, L.; Gołębiowski, M.; Humer, Matthias

doi:10.2478/aee-2015-0031

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…The most popular technique of modelling the em wave field is the FDTD (Finite Difference Time Domain) technique, and this technique is commonly used for the GPR method. Detailed information about application of the FDTD technique for radargram interpretation may be found in publication [6] and, therefore, a description of theoretical background of the FDTD method has been omitted. Numerical modelling was carried using ReflexW software (www.sandmeiergeo.de).…”

Section: Modelling Of Electromagnetic Wave Fieldmentioning

confidence: 99%

“…Material properties of several layers within the model were defined as follow (on the base of information from Table 1 and [2]): clay (εr=16, σ=10 mS/m), semi-compacted mixture of sand and gravel (εr=2.5÷9, σ=0.1÷0.9 mS/m), compacted mixture of sand and gravel (εr=9, σ=0.9 mS/m), loose mixture of sand and gravel (εr=1÷9, σ=0÷0.9 mS/m); for all materials, constant value of relative magnetic permittivity µr=1 was assumed. The technique of defining material properties for the semi-compacted and loose zones has been described in paper [6].…”

Section: Modelling Of Electromagnetic Wave Fieldmentioning

confidence: 99%

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Application of the GPR and ERT methods for non-invasive examination of a flood dike

2020

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As part of the NAWA-EMMAT project, geophysical surveys were carried out on selected sites in Poland, i.e. on the flood dike and in the surrounding of the concrete water dam. The goal of the surveys was the non- invasive detection of loose zones in the flood dike and fractured zones located in the subsoil of the water dam. Terrain geophysical measurements were conducted with the use of electrical and electromagnetic methods as well as applying seismic methods. Due to the limitations of the length of this paper, only selected results recorded on the flood dike using selected geophysical methods, i.e. electrical resistivity tomography (ERT) and ground penetrating radar (GPR) are presented. The presence of several higher hydraulic permeability zones in the dike was suggested by the results of the ERT method. The GPR method allowed, due to its high resolution, to identify small leakage zones in the body of the dike. An attempt at a quantitative interpretation of the geophysical data was made; for this purpose, the synthetic results obtained from numerical modelling of electrical and electromagnetic fields were applied. For proper construction of numerical models and further interpretation, the results of geotechnical sounding, geological drilling and the results of petrophysical measurements were also used.

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Section: Modelling Of Electromagnetic Wave Fieldmentioning

confidence: 99%

Section: Modelling Of Electromagnetic Wave Fieldmentioning

confidence: 99%

Application of the GPR and ERT methods for non-invasive examination of a flood dike

2020

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“…The important features of magnetic bearings, which differ them from other types of bearings are: contactless operation, lack of lubrications, operation in harsh environment and very low losses. These properties contribute to usage of magnetic bearings in many devices such as: flywheel energy storages, electrospindles, blowers, blood pumps and wind generators [1][2].…”

Section: Introductionmentioning

confidence: 99%

Simulation for the determination of the hybrid magnetic bearing's electromagnetic parameters

Wajnert¹

2017

ELECTROTECHNICAL REVIEW

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Three dimensional field modelling and the simulation results for a hybrid magnetic bearing are presented in the paper. The magnetic field distributions and the values of electromagnetic parameters in the function of the current intensity and the rotor position are given. The aim of the investigation was the determination of the magnetic bearing stiffness through the calculations of the magnetic force acting on the bearing rotor and the flux linkages with the windings. The simulations are important to the actuator designing and determination of its controlling parameters for proper operation of an electric drive system. Streszczenie. W artykule przedstawiono trójwymiarowe modelowanie pola oraz wyniki symulacji dla hybrydowego łożyska magnetycznego. W pracy podano rozkłady pola magnetycznego oraz wartości parametrów elektromagnetycznych w funkcji prądu i położenia wirnika. Celem badań było określenie sztywności łożyska magnetycznego poprzez obliczenia siły magnetycznej działającej na wirnik łożyska oraz strumienia skojarzonego z uzwojeniami. Symulacje są istotne w procesie projektowania siłownika oraz przy określeniu parametrów sterowania dla właściwej pracy elektrycznego systemu napędowego. Trójwymiarowe modelowanie pola oraz wyniki symulacji dla hybrydowego łożyska magnetycznego

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The gearless, grid-connected, 6-phase asymmetric wind turbine generator system

Cited by 2 publications

References 4 publications

Application of the GPR and ERT methods for non-invasive examination of a flood dike

Application of the GPR and ERT methods for non-invasive examination of a flood dike

Simulation for the determination of the hybrid magnetic bearing's electromagnetic parameters

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