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SHORTING DEVICE DRIVE OPTIMALIZATION
Michalík, Marek ; ABB, Drahomír Tůma, (oponent) ; Dohnal, Petr (vedoucí práce)
Objective of this bachelor thesis is optimalisation of shorting device drive located in high voltage switchboard in cooperation with company ABB s.r.o, for which this work is being done. First part is about theoretical analysis of switching devices with focus on switching devices without arc. Mentioned shorting device also belongs to this group. Work continues with current information from the field of electric drives, which are later used in practical part. Thesis contains theory about direct current motors in greater detail, especially group of direct current motors with permanent magnets, because this type of motor is currently used to drive the shorting device . In final part it analyses whole drive and all of its parts, some paragraphs are dedicated to choosing type of optimalisation and evaluation of current drive solution with focus on its errors and problems. Nameplate parameters of current motor and gearboxes are described. In practical part there is protocol about test of shorting device, which took place in ABB s.r.o. In last part you can find results of unloaded drive measurement. Optimalisation options are carefully analysed and compared. All suggested solutions were discussed in detail with representatives and technicians from industrial companies.
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Laboratory Workbench for Educational Purposes
Ondrejček, Vladimír
This work deals with the development and implementation of new laboratory device for laboratory exercises in electric drives. Reasons and requirements for this workbench are evaluated. In the next section a prototype design of laboratory stand is introduced. Finally the possibilities of extending and use in other subjects and applications are given.
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SHORTING DEVICE DRIVE OPTIMALIZATION
Michalík, Marek ; ABB, Drahomír Tůma, (oponent) ; Dohnal, Petr (vedoucí práce)
Objective of this bachelor thesis is optimalisation of shorting device drive located in high voltage switchboard in cooperation with company ABB s.r.o, for which this work is being done. First part is about theoretical analysis of switching devices with focus on switching devices without arc. Mentioned shorting device also belongs to this group. Work continues with current information from the field of electric drives, which are later used in practical part. Thesis contains theory about direct current motors in greater detail, especially group of direct current motors with permanent magnets, because this type of motor is currently used to drive the shorting device . In final part it analyses whole drive and all of its parts, some paragraphs are dedicated to choosing type of optimalisation and evaluation of current drive solution with focus on its errors and problems. Nameplate parameters of current motor and gearboxes are described. In practical part there is protocol about test of shorting device, which took place in ABB s.r.o. In last part you can find results of unloaded drive measurement. Optimalisation options are carefully analysed and compared. All suggested solutions were discussed in detail with representatives and technicians from industrial companies.
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Simulation of electric drives in freeware program
Hnilica, Peter ; Cipín, Radoslav (oponent) ; Huzlík, Rostislav (vedoucí práce)
The purpose of this thesis is to find and then to test the freeware alternative to Simulink. Introductory section presents short overview of the bachelor´s thesis. The second chapter is devoted to a search of available programs and to explore their potential for another use in the simulation process. In the third chapter are theoretical knowledges required for further work in simulation programs. The fourth chapter describes the simulation process of selected electrical machine in Simulink and in his freeware alternative as well as export measured values to an external file and comparison of these values. In conclusion are evaluated simulation results, including the ability of freeware alternatives to replace fully Simulink.
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Alternativní využití maticového měniče
Flígl, S. ; Lettl, Jiří
V posledních letech nalezly v pohonářských aplikacích významné uplatnění statické měniče kmitočtu, které lze dělit na nepřímé s napěťovým nebo proudovým stejnosměrným meziobvodem a přímé. Z přímých měničů kmitočtu je asi nejznámější přímý měnič kmitočtu s vnější komutací, obvykle nazývaný cyklokonvertor.
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