Laser devices today are built using many different technical designs determined by their target application where a very special use have lasers in medicine. The effects of medical lasers are determined by their basic physical properties (wavelength, collimation, coherence, monochromaticity) and&...

This paper deals with a calculation of losses in winding of the superconducting transformer 1MVA. The idea of this usage was originated in the SKODA Research Ltd., Pilsen. 5kVA model of this transformer was made with co-operation AS CR, UWB Pilsen, MFF Prague, Skoda Research&#...

This work deals with problems of determination of parameters of induction machine's substitution diagram using finite element method software FEMM. There are determined parameters of subtitution diagram corresponding both with stator and rotor (leakage inductances and resistivities) and magnetizing...

The paper deal with using of the fuel cell as a alternative electric source in light traction branch. The fuel cell is simulated by equivalent electric diagram and this diagram is used for simulation of the light traction drive. The next part is concern to control of...

This contribution deals with new configuration of the traction converter with medium-frequency transformer intended for ac trolley wire fed locomotives. The main objective of this paper is the control of primary voltage source active rectifiers connected in series and operated on the pr...