Prohlížení Publikační činnost ČVUT dle autora "Kněnický M."
-
Calibration of unipolar high current impulses for resistance spot welding
Autor: Hlaváček J.; Kněnický M.; Draxler K.
(Czechoslovakia Section IEEE, 2020)Requirement from practice is the need for quality and precise measurement of unipolar high current impulses, which are applied in resistance spot welding. The reason is the high dependence of weld quality on the shape and ... -
Impact of High-Frequency Voltage Distortion Emitted by Large Photovoltaic Power Plant on Medium Voltage Cable Systems
Autor: Kněnický M.; Procházka R.; Hlaváček J.; Šefl O.
(IEEE Power & Energy Society, 2021)Switching processes of voltage source converters can emit significant high-frequency distortions of frequencies between 5 to 20 kHz. Furthermore, the distortions can partly propagate from the place of their origin into a ... -
Life-Time of Oil Filled Insulation Paper under Nonstandard Voltage Stresses
Autor: Šefl O.; Kněnický M.; Procházka R.
(Czechoslovakia Section IEEE, 2018)In the recent years, technological development gave rise to numerous systems that utilize power semiconductor devices. As much as these devices improve the performance of electrical systems, they also pollute the network ... -
Very fast high voltage impulse generator
Autor: Hlaváček J.; Kněnický M.
(Czech Section of the IEEE VUT, 2018)Some high voltage applications use very fast impulses with rise time less than 100 nanoseconds. Measurements of these impulses are difficult, and a lot of different voltage dividers are used. In many cases, inadequate ...