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Study of More Efficient Manufacturing Technology for UniGear Doors
Drobilič, Ivo ; Kalina, Emil (referee) ; Sedlák, Josef (advisor)
The diploma thesis deals with the analysis of suitable technologies to produce the switchgear door of product UniGear with a design of more efficient production technology. Thesis is divided into four main chapters, in which the first part describes the doors of individual switchgear compartments, design of door materials, technology for achieving desired shape of a base plate, possibilities of sheet metal forming and other technologies not linked with sheet metal processing. The second part of the thesis deals with study of the whole current production process of doors in ABB s.r.o. from sheet metal processing till powder coating. The thesis also contains proposal of innovated production technologies with a selection and evaluation of the final variant with technical and economic evaluation of current and proposed solutions.
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Application of Ultracapacitors in Traffic Systems
Kalina, Emil ; Vorel, Pavel (advisor)
The work deals with relatively new components allowing electric energy accumulation – ultracapacitors. It focuses on their application in traffic systems – in independent electric vehicles. Design and verification of a system with ultracapacitor and DC/DC adaptive converter was done. Control of the adaptive converter modifies very positively the time wafeform of the traction accumulator current during the drive cycle. The designed connection of ultracapacitor and DC/DC converter implemented in the drive structure of experimental electric vehicle with induction machine contributes to increment the action radius of the vehicle by 16% (determined by experimental verification). This result was achived particularly by limitation of traction accumulator current peaks, And by more effective storage of energy gained by recuperative braking of the vehicle as well. The core of the system is a control of the adaptive converter in order to provide an active filtration of the accumulator’s current to its long-period mean value, i.e. elimination of current (power) peaks. These are caused by acceleration from non-zero initial vehicle speed or by recuperative braking. This is done by a subsidiary current loop. The converter has a superior voltage regulation loop, which sets in long-time period the voltage of ultracapacitors to the proper value – indirectly dependent on the speed of the vehicle. This ensures the appropriate energy management of the ultracapacitor. In the following, properties of test set of ultracapacitors were verified. Finally, methods of suppression of capacity variability influence in series connection of these components were compiled and critically reviewed.
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Study of More Efficient Manufacturing Technology for UniGear Doors
Drobilič, Ivo ; Kalina, Emil (referee) ; Sedlák, Josef (advisor)
The diploma thesis deals with the analysis of suitable technologies to produce the switchgear door of product UniGear with a design of more efficient production technology. Thesis is divided into four main chapters, in which the first part describes the doors of individual switchgear compartments, design of door materials, technology for achieving desired shape of a base plate, possibilities of sheet metal forming and other technologies not linked with sheet metal processing. The second part of the thesis deals with study of the whole current production process of doors in ABB s.r.o. from sheet metal processing till powder coating. The thesis also contains proposal of innovated production technologies with a selection and evaluation of the final variant with technical and economic evaluation of current and proposed solutions.
|
|
|
Application of Ultracapacitors in Traffic Systems
Kalina, Emil ; Vorel, Pavel (advisor)
The work deals with relatively new components allowing electric energy accumulation – ultracapacitors. It focuses on their application in traffic systems – in independent electric vehicles. Design and verification of a system with ultracapacitor and DC/DC adaptive converter was done. Control of the adaptive converter modifies very positively the time wafeform of the traction accumulator current during the drive cycle. The designed connection of ultracapacitor and DC/DC converter implemented in the drive structure of experimental electric vehicle with induction machine contributes to increment the action radius of the vehicle by 16% (determined by experimental verification). This result was achived particularly by limitation of traction accumulator current peaks, And by more effective storage of energy gained by recuperative braking of the vehicle as well. The core of the system is a control of the adaptive converter in order to provide an active filtration of the accumulator’s current to its long-period mean value, i.e. elimination of current (power) peaks. These are caused by acceleration from non-zero initial vehicle speed or by recuperative braking. This is done by a subsidiary current loop. The converter has a superior voltage regulation loop, which sets in long-time period the voltage of ultracapacitors to the proper value – indirectly dependent on the speed of the vehicle. This ensures the appropriate energy management of the ultracapacitor. In the following, properties of test set of ultracapacitors were verified. Finally, methods of suppression of capacity variability influence in series connection of these components were compiled and critically reviewed.
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