Národní úložiště šedé literatury Nalezeno 4 záznamů.  Hledání trvalo 0.00 vteřin. 
Vysokootáčkový asynchronní stroj
Cajzl, Jakub ; Pribulla, Daniel (oponent) ; Klíma, Petr (vedoucí práce)
Tato práce se zabývá elektromagnetickým návrhem vysokootáčkového asynchronního stroje. V úvodu jsou shrnuty především základní informace spojené s návrhovými aspekty vysokootáčkových strojů a volbou materiálů. Další část práce je detailněji zaměřena na porovnání základních topologií rotoru pro vysokootáčkové asynchronní stroje. Hlavní část této práce je věnována elektromagnetickému návrhu stroje a jeho parametrické analýze. Jsou zde prezentovány výsledky analytického návrhu základních rozměrů a parametrické analýzy.
Design Of A High-Speed Generator For A Helium Expansion Turbine
Pribulla, Daniel
This paper presents design of an ultra-high-speed generator, propelled by a helium expansionturbine. The power output of the presented generator is 5 kW at 160 000 rpm. Very highefficiency, over 95%, was achieved thanks to the use of permanent magnet synchronous machine typeand proper material selection. Special care was taken during design of the machine rotor to meet bothmechanical and electromagnetic requirements. Only high-strength materials can withstand the load.Stator sheets have to be very thin, to suppress the skin effect and eddy current losses, especially withthe 4 pole configuration. It was shown that the design process for standard, low-speed machines canbe used with the awareness of it’s limitations. Weak points of the design, which should be furtherinvestigated, were pointed out.
Energy harvesting generator for train track side
Pribulla, Daniel ; Rubeš, Ondřej (oponent) ; Hadaš, Zdeněk (vedoucí práce)
The aim of this thesis was to design an alternative power source for an Object Controller, a component of the European Rail Traffic Management System wayside equipment. Compared to previous harvesters, a mechanical coupling, e.g. gearbox, was eliminated by using linear electric generator. This should increase the service life and reliability of the device. A three different permanent magnet synchronous generators were designed using magnetic circuit analogy and finite element methods software, namely FEMM and Ansys Maxwell. The simulation in Matlab Simulink proved, that the final generator design is capable of producing mean power of 5 W during the pass of a train from rail deflection higher than 2 mm.
Design of Power HIL unit for Li-pol cell simulation
Pribulla, Daniel ; Sova, Václav (oponent) ; Chalupa, Jan (vedoucí práce)
This thesis deals with design and construction of a Li-po cell Power-HIL simulator intended for testing of a small wireless module's powering. The simulator is based on a battery model which includes the influence of temperature and battery degradation on battery parameters. To estimate model parameters a series of tests on real Li-po cell with capacity 250mAh were performed. Charging and discharging tests were performed by different temperatures of the battery. In purpose of this test a simple thermal chamber was constructed. Design of the power electronics of the device was tested in the Simscape library of the Matlab Simulink. The result is a working prototype of the simulator tested for charging and discharging of batteries with capacity in range 100-1500 mAh. The simulator can be controlled with graphical user interface capable of setting the battery parameters and real time observation of the model variables.

Viz též: podobná jména autorů
1 Pribulla, D.
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