National Repository of Grey Literature 6 records found  Search took 0.00 seconds. 
Zjednodušené 2D zobrazení elektromagnetického pole pohonu s indukčním motorem
Nečesaný, Jakub ; Škramlík, Jiří ; Jehlička, Vladimír
This work is focused on magnetic field modeling and analysis inside and outside the trolley bus 21 TR. Computation is carried out for application of two different power switching semiconductor devices. Influence on environment and near low-current and telecommunication systems is evaluated. Local maximum of magnetic field and the geometrical convergence is also determined. The results are discussed with the corresponding standards and concretemeasurement on the vehicle.
The Impact of the Grid Impadance on the HPF Performance
Škramlík, Jiří
For the implementation of Hybrid Power Filters (HPF) into a real environment it is desirable to know the impact of the grid impedance on the HPF performance. The paper evaluates the impact of diffetent components of the grid impedance and a load impedance on the HPF performance criteria by using the Fourier analysis.
Computation Simulation of Noise and Electromagnetic Waves in City Mass Transport Vehicles
Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír ; Nečesaný, Jakub
New problems emerge in the vehicles of city mass transportation due to the development, change of the some structure or application of the new devices. These problems are noise, vibration and electromagnetic interference. They were aimed at finding their sources, at verifying their influence and finding methods for their limitation.
Prediction of Propagation of Noice and Electromagnetic Waves in Vehicles of Mass Transportation
Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír
News problems emerge in the vehicles of city mass transportation due to the development, change of the some structure or application of the new devices. These problems are noise, vibration and electromagnetic interference. They were aimed at finding their sources, at verifying their influence and finding methods for their limitation.
Overvoltage Phenomena and Electromagnetic Interference Produced by Voltage Source Inverter with IGCT Switching Devices
Škramlík, Jiří ; Bartoš, Stanislav ; Jehlička, Vladimír
The paper summarized experience optained from an IGCT - inverter operating under laboratory conditions as well as in city mass transport vehicles. Overvoltage phenomena arising between the inverter and the supplied induction motor, the influence of the used cables, and the EMC are discussed. Finally, a comparison of EMI produced by IGCT and IGBT converters is given.
Noise, vibration and electromagnetic phenomena produced by semiconductor converters in traction vehicles
Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír ; Škramlík, Jiří
Due to the recent employment of up-to-date control electronic and electromechanical devices in cars of City Mass Transportation, new problems arise concerning the dynamics, noise, and the radiation of electromagnetic fields. Their environmental impacts, however, have not been discussed sufficiently, so far.

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