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Sacristian bell operation control by programmable logic controller
Křížek, Ladislav ; Marada, Tomáš (referee) ; Němec, Zdeněk (advisor)
The bell is described, its parts and constructive suppositions for the right function in this work, sacristian bell operation control with hand-working and with the rotating electromotor. Programmable logic controller machine SIEMENS Simatic S7-200 CPU 221 is also described, which is the part of ringing machine in Bukovinka’s church. This ringing machine and especially the mode of both bells have specific defect. According to owner´s wishes and instructions were two variants prepared for this ringing machine to improve the working of couple bells. One of these variants was tested and just tuned at the ringing machine. This one variant follows the owner´s wish, works in Bukovinka´s church till now.
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Konstrukce elektrického motocyklu
Dobeš, Jan
In diploma thesis Construction of electric motorcycles I deal with issue of electric motorcycles, their types, constructions, advantages and their use. One part includes description of tractions and transmissions. Next part describes batteries, which are necessary in electric vehicles. The aim of this work is to compare different solutions of vehicle constructions. Experiment is about two constructions of quad. This quad used combustion engine and was modified to electric power. Electric quad was tested on power testing stand. Experimental quad constructions which were used were compared and evaluated. Experiment included test of stamina of fully charged battery.
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Alternativní pohony motorových vozidel
Puchnar, Lukáš
This Bachelor thesis focuses on the possibilities of using alternative fuels to operate the vehicle. In the first chapters, there is a review of fossil fuels used, its properties and monitored emission parameters. The following section is devoted to gas fuels, problems associated with the storage in the vehicle and engine modifications. Further are descri-bed biofuels, its production and application in combustion engines. Subsequently the electric vehicles is briefly described, current state and performance characteristics of this type of vehicles. The distribution of hybrid vehicle propulsion systems follows. The final section focuses on the economic comparison of selected alternative drives, its af-fordability and costs of operation.
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Construction of modeller electromotor
TOMÁŠEK, Zdeněk
The main aim of this thesis is the construction of small electronically switched engine from currently available components. This engine would be usable in aeroplane prototypes into the weight of 350 g. The part of this thesis is the theory of physical principle of a turning engine, the description of kinds of a direct-current motors and the method of speed control. At the end of this thesis is shown the result of measurement of a static thrust of designed engine with different rotors and propellers.
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